Claims:We Claim:

1. A system for preventing an invalid speed pulse input to an electronic control unit (ECU) of a vehicle, the system comprising:
a hall effect sensor configured to:
detect a rotational speed of at least one wheel of a vehicle; and
generate a speed signal pulse based on the rotational speed of the at least one wheel;
a switching unit configured to convert the speed signal pulse to at least one of predetermined threshold amplitudes;
a signal conditioning unit configured to generate a uniform square wave signal pulse;
a processing unit in communication with the signal conditioning unit, wherein the processing unit comprises a detection unit;
wherein the detection unit is configured to:
count a number of the uniform square wave signal pulse in a predetermined time period;
determine a frequency of the uniform square wave signal pulse;
compare the determined frequency with a predefined range of frequency; and
generate a control signal if an invalid frequency is detected, wherein the invalid frequency is outside the predefined range of frequency; and
a control unit in communication with the processing unit and configured to:
receive the uniform square wave signal pulse for providing the speed pulse input to the ECU; and
turn off the speed pulse input to the ECU of the vehicle if the control signal is received from the detection unit.

2. The system as claimed in claim 1, wherein the hall effect sensor includes at least one of: a voltage-type sensor or a current-type sensor.

3. The system as claimed in claim 1, wherein the speed signal pulse includes a current signal, and
wherein the system further comprises:
a current to voltage convertor configured to:
receive the current signal from the hall effect sensor; and
convert the current signal to generate a voltage signal.

4. The system as claimed in claim 1, wherein:
the signal conditioning unit at least comprises a low pass circuit and a Schmitt Trigger circuit, and
the control unit at least comprises a switching circuit and a combination of one or more resistors, diodes, and capacitors.

5. The system as claimed in claim 4, wherein to generate the uniform square wave signal pulse:
the low pass filter is configured to remove a high frequency noise, and
the Schmitt Trigger circuit is configured to generate the uniform square wave signal pulse.

6. The system as claimed in claim 1, further comprising:
a display unit in communication with the processing unit,
wherein the processing unit is configured to determine a speed of the vehicle based on the frequency of the uniform square wave signal pulse, and
wherein the display unit is configured to display the speed of the vehicle if the frequency of the uniform square wave signal pulse is within the predefined range of frequency.

7. A method of preventing invalid speed pulse input to an electronic control unit (ECU) of a vehicle, the method comprising:
detecting a rotational speed of at least one wheel of a vehicle through a hall effect sensor;
generating a speed signal pulse based on the rotational speed of the at least one wheel;
converting the speed signal pulse to at least one of predetermined threshold amplitudes;
performing signal conditioning on the speed signal pulse to generate a uniform square wave signal pulse;
counting a number of uniform square wave signal pulse in a predetermined time period;
determining a frequency of the uniform square wave signal pulse;
comparing the determined frequency with a predefined range of frequency; and
generating a control signal if an invalid frequency is detected, wherein the invalid frequency is outside the predefined range of frequency;
receiving the uniform square wave signal pulse for providing the speed pulse input to the ECU; and
turning off the speed pulse input to the ECU of the vehicle if the control signal is generated.

8. The method as claimed in claim 7, wherein the hall effect sensor includes at least one of: a voltage-type sensor or a current-type sensor.

9. The method as claimed in claim 7, wherein the speed signal pulse includes a current signal, and
wherein the method further comprises:
receiving the current signal from the hall effect sensor; and
converting the current signal to generate a voltage signal.

10. The method as claimed in claim 7, wherein performing signal conditioning on the speed signal pulse comprises:
removing a high frequency noise using a low pass filter, and
generating the uniform square wave signal pulse through a Schmitt Trigger circuit.

11. The method as claimed in claim 7, further comprising:
determining a speed of the vehicle based on the frequency of the uniform square wave signal pulse; and
displaying the speed of the vehicle if the frequency of the uniform square wave signal pulse is within the predefined range of frequency.

Dated 22nd Day of March 2022

Priyank Gupta
Agent for the Applicant
IN/PA-1454
, Description:TECHNICAL FIELD
Present disclosure generally relates to field of automobiles. Particularly, but not exclusively, the present disclosure relates to a system and a method for preventing invalid speed pulse input to an electronic control unit (ECU) of a vehicle.
BACKGROUND
Speed sensors are widely used in automotive, aeronautics, and various other precision engineering industries. In automotive industry, different types of wheel speed sensors are used for determining a speed of a vehicle. The speed sensors are generally mounted on the wheels of the vehicle and are used to transmit information to various systems, such as the anti-lock braking system (ABS) for dynamic vehicle control.
Speed sensors typically detect vehicle speed based on a current or a voltage signal received from a hall effect sensor located on a vehicle. The hall effect sensor based on a contact established with gear teeth generates a high/low current or voltage signal. The speed of the vehicle is calculated based on the output current or voltage signal from the hall effect sensor.
In some application, electronic control unit (ECU) of the vehicle relies on the speed sensors output signals to control and perform various functionalities of the vehicle. The ECU may receive the speed signal from an electronic instrument cluster or speedometer in communication with the speed sensor. However, the speed sensors output signals are prone to noise and errors based on environment of operation and various other factors. Thus, any invalid output signal from the speed sensor may impact the operations of the ECU of the vehicle.
Therefore, there exists a need in the art to provide a technique which overcome the above-mentioned problems and to efficiently detect invalid speed pulse signal from the speed sensor and prevent invalid speed input to an ECU of a system or an automobile.
SUMMARY
The present disclosure overcomes one or more shortcomings of the prior art and provides additional advantages discussed throughout the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.
In one non-limiting embodiment of the present disclosure, a system for preventing an invalid speed pulse input to an electronic control unit (ECU) of a vehicle is disclosed. The system comprises a hall effect sensor configured to detect a rotational speed of at least one wheel of a vehicle and generate a speed signal pulse based on the rotational speed of the wheel. The system further comprises a switching unit configured to convert the speed signal pulse to at least one of predetermined threshold amplitudes, a signal conditioning unit configured to generate a uniform square wave signal pulse, and a processing unit in communication with the signal conditioning unit, The processing unit comprises a detection unit configured to count a number of the uniform square wave signal pulse in a predetermined time period, determine a frequency of the uniform square wave signal pulse, compare the determined frequency with a predefined range of frequency, and generate a control signal if an invalid frequency is detected. The invalid frequency being outside the predefined range of frequency. The system further comprises a control unit in communication with the processing unit and configured to receive the uniform square wave signal pulse for providing the speed pulse input to the ECU and turn off the speed pulse input to the ECU of the vehicle if the control signal is received from the detection unit.
In another non-limiting embodiment of the present disclosure, the hall effect sensor includes at least one of: a voltage-type sensor or a current-type sensor.
In yet another non-limiting embodiment of the present disclosure, the speed signal pulse includes a current signal, and the system further comprises a current to voltage convertor configured to receive the current signal from the hall effect sensor and convert the current signal to generate a voltage signal.
In yet another non-limiting embodiment of the present disclosure, the signal conditioning unit at least comprises a low pass circuit and a Schmitt Trigger circuit, and the control unit at least comprises a switching circuit and a combination of one or more resistors, diodes, and capacitors.
In yet another non-limiting embodiment of the present disclosure, the low pass filter is configured to remove a high frequency noise, and the Schmitt Trigger circuit is configured to generate the uniform square wave signal pulse.
In yet another non-limiting embodiment of the present disclosure, the system further comprises a display unit in communication with the processing unit. The processing unit is configured to determine a speed of the vehicle based on the frequency of the uniform square wave signal pulse, and the display unit is configured to display the speed of the vehicle if the frequency of the uniform square wave signal pulse is within the predefined range of frequency.
In yet another non-limiting embodiment of the present disclosure, a method of preventing invalid speed pulse input to an electronic control unit (ECU) of a vehicle is disclosed. The method comprises detecting a rotational speed of wheel of a vehicle through a hall effect sensor, generating a speed signal pulse based on the rotational speed of the wheel, converting the speed signal pulse to at least one of predetermined threshold amplitudes, and performing signal conditioning on the speed signal pulse to generate a uniform square wave signal pulse. The method further comprises counting a number of uniform square wave signal pulse in a predetermined time period, determining a frequency of the uniform square wave signal pulse, comparing the determined frequency with a predefined range of frequency, and generating a control signal if an invalid frequency is detected. The invalid frequency is outside the predefined range of frequency. The method further describes receiving the uniform square wave signal pulse for providing the speed pulse input to the ECU and turning off the speed pulse input to the ECU of the vehicle if the control signal is generated.
In yet another non-limiting embodiment of the present disclosure, the speed signal pulse includes a current signal, and the method further comprises step of receiving the current signal from the hall effect sensor and converting the current signal to generate a voltage signal.
In yet another non-limiting embodiment of the present disclosure, performing signal conditioning on the speed signal pulse comprises removing a high frequency noise using a low pass filter, and generating the uniform square wave signal pulse through a Schmitt Trigger circuit.
In yet another non-limiting embodiment of the present disclosure, the method further comprises determining a speed of the vehicle based on the frequency of the uniform square wave signal pulse and displaying the speed of the vehicle if the frequency of the uniform square wave signal pulse is within the predefined range of frequency.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The features, nature, and advantages of the present disclosure will become more apparent from the detailed description set forth below when taken in conjunction with the drawings in which like reference characters identify correspondingly throughout. Some embodiments of system and/or methods in accordance with embodiments of the present subject matter are now described, by way of example only, and with reference to the accompanying figures, in which:
Fig. 1 illustrates an environment for preventing invalid speed pulse input to electronic control unit of vehicle, in accordance with an embodiment of the present disclosure;
Fig. 2 shows a block diagram illustrating a system for preventing invalid speed pulse input to electronic control unit of vehicle, in accordance with an embodiment of the present disclosure;
Fig. 3 illustrates a block diagram illustrating a system for preventing invalid speed pulse input to electronic control unit of vehicle, in accordance with another embodiment of the present disclosure;
Fig. 4 shows a circuit diagram of a system for preventing invalid speed pulse input to electronic control unit of vehicle, in accordance with an embodiment of the present disclosure;
Fig. 5 shows a circuit diagram of a control unit, in accordance with an embodiment of the present disclosure;
Fig. 6 shows a flowchart illustrating a method of preventing invalid speed pulse input to electronic control unit of vehicle, in accordance with an embodiment of the present disclosure;
It should be appreciated by those skilled in the art that any block diagram herein represents conceptual views of illustrative systems embodying the principles of the present subject matter. Similarly, it will be appreciated that any flow charts, flow diagrams and the like represent various processes which may be substantially represented in computer readable medium and executed by a computer or processor, whether or not such computer or processor is explicitly shown.
DETAILED DESCRIPTION
The terms “comprise”, “comprising”, “include(s)”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, system or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or system or method. In other words, one or more elements in a system or apparatus proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.
In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
Present disclosure describes method and system for preventing an invalid speed pulse input to an electronic control unit (ECU) of a vehicle. The system comprises a hall effect sensor configured to detect a rotational speed of at least one wheel of a vehicle and generate a speed signal pulse based on the rotational speed of the wheel. The system further comprises a switching unit configured to convert the speed signal pulse to at least one of predetermined threshold amplitudes and a signal conditioning unit configured to generate a uniform square wave signal pulse. The processing unit comprises a detection unit configured to count a number of uniform square wave signal pulse in a predetermined time period, determine a frequency of the uniform square wave signal pulse, compare the determined frequency with a predefined range of frequency, and generate a control signal if an invalid frequency is detected. The invalid frequency being outside the predefined range of frequency. The system further comprises a control unit configured to receive the uniform square wave signal pulse for providing the speed pulse input to the ECU and turn off the speed pulse input to the ECU of the vehicle if the control signal is received from the detection unit. Thus, the system prevents the invalid speed pulse input to an electronic control unit (ECU) and helps the ECU in avoiding any incorrect operation.
Fig. 1 illustrates an environment 100 for preventing invalid speed pulse input to electronic control unit of vehicle, in accordance with an embodiment of the present disclosure.
In an embodiment of the present disclosure, the environment 100 comprises a two-wheeler vehicle 101, at least one speed sensor 103, a speedometer 105, and an electronic control unit (ECU) 107 of the vehicle. The at least one speed sensor 103 may be located at a front wheel, rear wheel, or both. In one non-limiting embodiment of the present disclosure, the speed sensor 103 may be located in the gearbox of the vehicle.
In an embodiment of the present disclosure, the speedometer may be a hall effect speed sensor. However, the speed sensor is not limited above example and any other speed sensor such as magnetoresistive, inductive, variable reluctance, and optical type speed sensors are well within the scope of present disclosure.
In an embodiment of the present disclosure, while the two-wheeler vehicle 101 is in motion, the speed sensor 103 is configured to generate a speed signal pulse based on the rotation speed of the wheel. The speed signal of the speed signal is then processed through a number of operational steps to determine the speed of the vehicle 101. The operation steps may also comprise determining whether the frequency of the speed signal is within a predefined range of frequency. The other operations on the speed signal are discussed in detail in below embodiments.
If the frequency of the speed signal is within the predefined range of frequency, the determined speed is then transmitted to the speedometer 105 for displaying the speed of the vehicle 101 and to the ECU 107 for carrying out various operations of ECU 107. If the frequency of the speed signal is outside the predefined range of frequency, the determined speed is not displayed on the speedometer 105 and the speed signal input to the ECU 107 is turned off.
Thus, by preventing the invalid speed signal from speed sensor to the ECU 107, the ECU 107 avoids incorrect operations. Further, the incorrect speed of the vehicle 101 is not displayed on the speedometer 105.
Fig. 2 shows a block diagram illustrating a system 200 for preventing invalid speed pulse input to electronic control unit of vehicle, in accordance with an embodiment of the present disclosure.
In an embodiment of the present disclosure, the system 200 may comprise a speed sensor 220, an electronic control unit 230, and a plurality of units 210 in communication with each other. The system 200 may be installed on a two-wheeler vehicle. However, the present disclosure is not limited to vehicle and any other device or machine may comprise a speed sensor is well within the scope of present disclosure.
In an embodiment of the present disclosure, the plurality of units 210 may comprise a switching unit 201, a signal conditioning unit 203, a processing unit 207, a display unit 205, and a control unit 209, in communication with each other. The plurality of units 210 may comprise a dedicated hardware circuitry for performing their respective operations, as discussed in detail in below embodiments. In one non-limiting embodiment, the plurality of units 210 may be implemented inside the ECU 230 and ECU 230 may perform the all the operation of the plurality of units 210.
In an embodiment of the present disclosure, the speed sensor 220 may comprise at least one hall effect sensor. The at least one hall effect sensor may comprise a voltage-type sensor. However, the speed sensor 220 is not limited to above example and any other speed sensor is well within the scope of the present disclosure.
The at least one hall effect sensor may be configured to detect a rotational speed of at least one wheel of the vehicle and generate a speed signal pulse based on the rotational speed of the wheel. The position of the hall effect sensor may be as discussed in above embodiments.
The switching unit 201 may be configured to convert/change the amplitude of the speed signal pulse to at least one of the predetermined threshold amplitudes. In one non-limiting embodiment of the present disclosure, the predetermined threshold amplitudes may be +5V and -5V. However, the predetermined threshold amplitudes are not limited to above example and any other predetermined threshold amplitudes are well within the scope of present disclosure.
The switching unit 201 is in communication with the signal conditioning unit 203 and the signal conditioning unit 203 is configured to receive the speed signal pulse having the predetermined amplitude and generate a uniform square wave signal pulse as output. In one non-limiting embodiment of the present disclosure, the signal conditioning unit 203 at least comprises a low pass circuit and a Schmitt Trigger circuit. However, the components of the signal conditioning unit 203 is not limited to above example and any other hardware circuitry or component required to perform the above-mentioned functionality is well within the scope of present disclosure.
The output of the signal conditioning unit 203 is then fed to the processing unit 207 for further processing. The processing unit 207 may comprise a detection unit (not show). The detection unit may be configured to count a number of the uniform square wave signal pulse in a predetermined time period, determine a frequency of the uniform square wave signal pulse, compare the determined frequency with a predefined range of frequency, and generate a control signal if an invalid frequency is detected. The invalid frequency is outside the predefined range of frequency. The processing unit 207 may comprise at least one microcontroller or one or processors in combination with memory.
In an embodiment of the present disclosure, the processing unit 207 may be configured to determine a speed of the vehicle based on the frequency of the uniform square wave signal pulse. The processing unit 207 may forward the determined speed to the display unit 205 if the frequency of the uniform square wave signal pulse is within the predefined range of frequency. The display unit 205 may be then configured to display the speed of the vehicle. In one non-limiting embodiment of the present disclosure, the display unit 205 may be electronic instrument cluster or any other instrument/device known to a person skilled in the art.
The control unit 209 is in communication with the processing unit 207. The control unit 209 may be configured to receive the uniform square wave signal pulse and forward the signal pulse as a speed pulse input to the ECU 230. The control unit 209 may be configured turn off the speed pulse input to the ECU 230 of the vehicle if the control signal is received from the detection unit. The control unit 209 at least comprises a switching circuit and a combination of one or more resistors, diodes, and capacitors. However, the components or circuitry of the control unit 209 is not limited to above example and other circuitry for performing the above-mentioned operations is well within the scope of present disclosure.
Thus, by preventing the invalid speed signal input the ECU 230, the ECU 230 avoids incorrect operations. Further, the incorrect speed of the vehicle is not displayed on the display unit 205.
The above system 200 is not limited to preventing an invalid speed pulse input to an electronic control unit (ECU) of a vehicle and a person skilled in the art may use the above system 200 along with ECU in any other application for controlling the action of the ECU based on the speed sensor output.
Fig. 3 shows a block diagram illustrating a system 300 for preventing invalid speed pulse input to electronic control unit of vehicle, in accordance with another embodiment of the present disclosure.
In an embodiment of the present disclosure, the system 300 may comprise a speed sensor 320, an electronic control unit 330, and a plurality of units 310 in communication with each other. The system 300 may be installed on a two-wheeler vehicle. However, the present disclosure is not limited to vehicle and any other device or machine may comprise a speed sensor is well within the scope of present disclosure.
In an embodiment of the present disclosure, the plurality of units 310 may comprise a current to voltage converter 301, a switching unit 303, a signal conditioning unit 305, a processing unit 309, a display unit 307, and a control unit 311, in communication with each other. The plurality of units 310 may comprise a dedicated hardware circuitry for performing their respective operations, as discussed in detail in below embodiments. In one non-limiting embodiment, the plurality of units 310 may be implemented inside the ECU 330 and ECU 330 may perform the all the operation of the plurality of units 310.
The speed sensor 320 may be a hall effect speed sensor. The hall effect sensor includes a current-type sensor. The hall effect sensor may be configured to detect a rotational speed of at least one wheel of a vehicle and generate a speed signal pulse based on the rotational speed of the at least one wheel. The speed signal pulse may include a current signal. The current to voltage converter 301 may be configured to receive the current signal from the hall effect sensor and convert the current signal to generate a voltage signal.
The switching unit 303, the signal conditioning unit 305, the processing unit 309, the display unit 307, and the control unit 311 of the system 300 may perform operations similar to that of the switching unit 201, the signal conditioning unit 203, the processing unit 207, the display unit 205, and the control unit 209, as discussed in above embodiments.
Thus, the system 300 also prevents the invalid speed signal input the ECU 330, and the ECU 330 avoids incorrect operations. Further, the incorrect speed of the vehicle is not displayed on the display unit 307.
Fig. 4 shows a circuit diagram 400 of a system for preventing invalid speed pulse input to electronic control unit (ECU) of a vehicle, in accordance with an embodiment of the present disclosure.
The circuit diagram 400 represents the system 200 or system 300 as discussed in above embodiments. The resistor R1 may act as current to voltage convertor 301 for converting the current signal from the hall-effect speed sensor into voltage signal. In one non-limiting embodiment of the present disclosure, the switching unit 201, 303 may comprise resistors R2, R3, R4, capacitor C1 & transistor T1. However, the current to voltage convertor 301 and switching unit 201, 303 are not limited to above example, and any other circuits representing the current to voltage convertor 301 and switching unit 201, 303 are well within the scope of present disclosure.
In one non-limiting embodiment of the present disclosure, the signal conditioning unit 203 and 305 may comprise resistors R5, R6, capacitors C2, C3 and Schmitt Trigger IC. Resistor R5 & Capacitor C2 forms a low pass filter for blocking the high frequency noise. Schmitt Trigger IC may be configured convert irregular waveshape into uniform square wave signal. However, the signal conditioning unit 203 and 305 is not limited to above example, and any other circuit representing the signal conditioning unit 203 and 305 is well within the scope of present disclosure.
In one non-limiting embodiment of the present disclosure, the control unit 209, 311 may comprise resistors R8, R9, capacitors C4, C5, diodes D1, D2, and transistor T2. The control unit 209, 311 may be configured to perform the steps as discussed in above embodiments. However, the control unit 209, 311 is not limited to above example, and any other circuit representing the control unit 209, 311 is well within the scope of present disclosure.
Fig. 5 shows a circuit diagram 500 of a control unit 209, 311, in accordance with an embodiment of the present disclosure.
The control unit may comprise resistors R2, R3, transistor T, and capacitors C1, C2 as a switching circuit that turns ON and OFF based on the control signal received from the microcontroller (MCU) or processing unit. The control unit may further comprise resistor R1, Diode D1, and diode D2, which may act as signal conditioning unit for the incoming control signal and square wave pulse from the Schmitt Trigger circuit. The control unit may be electrically connected to the signal conditioning unit and processing unit as discussed in above embodiments. However, the control unit is not limited to above example, and any other circuit representing the control unit is well within the scope of present disclosure.
Fig. 6 shows a flowchart illustrating a method 600 of preventing invalid speed pulse input to electronic control unit of vehicle, in accordance with an embodiment of the present disclosure.
At block 601, a rotational speed of at least one wheel of the vehicle may detected using a hall effect sensor and a speed signal pulse is generated based on the rotational speed of the wheel. The hall effect sensor includes at least one of: a voltage-type sensor or a current-type sensor. If the hall effect sensor is current-type sensor, then the method 600 may further comprise receiving the current signal from the hall effect sensor and converting the current signal of the hall effect sensor to generate a voltage signal.
At block 603, the speed signal pulse is converted to at least one of predetermined threshold amplitudes. In one non-limiting embodiment, the predetermined threshold amplitudes may be +5V, 0V or -5V, 0V. However, the predetermined threshold amplitudes are not limited to above embodiments and any other amplitude is well within the scope of present disclosure.
At block 605, signal conditioning is performed on the speed signal pulse to generate a uniform square wave signal pulse. The signal conditioning applied on the speed signal pulse may comprise removing a high frequency noise using a low pass filter and generating the uniform square wave signal pulse through a Schmitt Trigger circuit.
At block 607, a number of uniform square wave signal pulse in a predetermined time period is counted and a frequency of the uniform square wave signal pulse is determined using a detection unit as discussed in above embodiment. At block 609, the determined frequency is compared with a predefined range of frequency and a control signal is generated if an invalid frequency is detected. The invalid frequency is outside the predefined range of frequency.
At block 611, the uniform square wave signal pulse for providing the speed pulse input to the ECU is received after signal conditioning. At block 613, the speed pulse input to the ECU of the vehicle is turned off, if the control signal is generated.
In one non-limiting embodiment, the method 600 may comprise determining a speed of the vehicle based on the frequency of the uniform square wave signal pulse and displaying the speed of the vehicle if the frequency of the uniform square wave signal pulse is within the predefined range of frequency.
Thus, the method 600 prevents the invalid speed signal input the ECU, and the ECU avoids incorrect operations. Further, the incorrect speed of the vehicle is not displayed on the display unit.
In another embodiment of the present disclosure, the steps of method 600 may be performed in an order different from the order described above.
The illustrated steps are set out to explain the exemplary embodiments shown, and it should be anticipated that ongoing technological development will change the manner in which particular functions are performed. These examples are presented herein for purposes of illustration, and not limitation. Further, the boundaries of the functional building blocks have been arbitrarily defined herein for the convenience of the description. Alternative boundaries can be defined so long as the specified functions and relationships thereof are appropriately performed. Alternatives (including equivalents, extensions, variations, deviations, etc., of those described herein) will be apparent to persons skilled in the relevant art(s) based on the teachings contained herein. Such alternatives fall within the scope and spirit of the disclosed embodiments.
The processing unit 207, 309, and ECU 107, 230, 330 may include, but are not restricted to, a general-purpose processor, a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), microprocessors, microcomputers, micro-controllers, digital signal processors, central processing units, state machines, logic circuitries, and/or any devices that manipulate signals based on operational instructions.
Furthermore, one or more computer-readable storage media may be utilized in implementing embodiments consistent with the present disclosure. A computer-readable storage medium refers to any type of physical memory on which information or data readable by a processor may be stored. Thus, a computer-readable storage medium may store instructions for execution by one or more processors, including instructions for causing the processor(s) to perform steps or stages consistent with the embodiments described herein. The term “computer- readable medium” should be understood to include tangible items and exclude carrier waves and transient signals, i.e., are non-transitory. Examples include random access memory (RAM), read-only memory (ROM), volatile memory, nonvolatile memory, hard drives, CD ROMs, DVDs, flash drives, disks, and any other known physical storage media.
Suitable processors include, by way of example, a processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of integrated circuit (IC), and/or a state machine.
ADVANTAGES OF THE PRESENT DISCLOSURE
Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these advantages may include those provided by the following features.
In an embodiment, the present disclosure prevents the invalid speed signal input the ECU., and the ECU 330 avoids incorrect operations. Further, the incorrect speed of the vehicle is not displayed on the display unit 307.
In an embodiment, the present disclosure helps the ECU in avoiding incorrect operations.