FIELD OF THE INVENTION
The present invention relates to a remote controlled system and ,in particular, to a long distance remote controlled system to operate a battery powered car. The system of the invention provides for remote communication between the car to be operated and a computer to control the motion of the battery power car of any size The system is effective in controlling the direction of the car through the key board of the computer and importantly such control will not involve UHF / VHF radio frequency bandwidth and is therefore free of any interference with any communication devices Advantageously the system of the invention is also adapted such that it is free from any sort of hacking and / or unauthorized access / interference.
BACKGROUND ART
It is well known to utilize and use variety of battery powered cars for various end use / applications and considering the wide application of such battery powered car there has always been a need to provide for improved and better operation of such cars especially authorized access and use of such batter powered car for variety of end use and application.
It is also known that computers have wide variety of applications and uses and is now used in all fields of technology for better and improved performance. In particular, computers provide for simple and user friendly provision and considering its capabilities of flexibilities of operation and utilities there has always been attempts to utilize computers in wide variety of applications and utilities.
While battery powered cars are known and made available its remote control from a long distance which would be effective and authentic is desired for favoring wider application and use of such battery power cars. In particular,
2
a need is faced in the art to provide for suitable systems so that battery power cars can be moved automatically upto a desired distance and in the process desired control of the directions of the car is also found to be of extreme importance.
Usually there are several remote control mechanism for remote accessibility of gadgets and devices, however, such devices usually involve the use of UHF / VHF radio frequency bandwidth which is found to possibly interfere with variety of other communication devices using such radio frequency bandwidth. In case of controlling battery powered cars from remote distance it is important that the control should be interference free and should be also effective. Moreover, there are some remote controlled systems which are again subject to problems of hacking thereby causing concerns on the reliability of such remote controlled systems
OBJECT OF THE INVENTION
It is thus the basic object of the invention to provide for a safe and secure remote control system involving computer facilities/means whereby a battery powered car of any size can be driven from a distance which would be effective and enable proper controlling of the motion of the car from a remote location.
Another object of the present invention is to provide for a remote controlled system to operate any battery powered car which would favour moving the car automatically upto a desired distance by controlling such direction of the car through key board of the computer situated in a remote location.
Another object of the present invention is to provide for a remote controlled system to operate a battery powered car which would not involve the use of the usual (UHF) / VHF) radio frequency bandwidth and would therefore avoid the possibility of interference with any other communication device
3
A further object of the invention is directed to a remote controlled system to operate battery power car which would be authentic and accept only the signals from the remote controlled connected to the car and will not accept any sort of signals from any other devices.
A further object of the present invention is directed to a remote controlled system which would be free from any sort of hacking and therefore would be safe and reliable for remotely controlling the motion of a battery powered car.
Yet another object of the present invention is directed to a remote controlled system for operating battery powered car which would favour controlled motion of the car around in any field and further adapted to send pictures of the site through wireless camera fitted in the car with the picture of the site viewable through on line video on the computer screen.
SUMMARY OF THE INVENTION
Thus according to the basic aspect of the present invention there is provided a remote controlled system to operate a battery powered car|comprising-
a transmitter unit comprising
(i) a remote control device operatively connected to a computer means;
(ii) a microcontroller means adapted to multiply the signal output from said computer and adapted such as to non-erroneously carry the signal through an operatively connected phone line;
a receiver unit comprising
4
(i) a cell phone adapted to receive the signal from said transmitter unit via said phone line ;
(ii) amplification means adapted to amplify the signal thus received and means to provide the same suitable for input to a microcontroller means;
(iii) microcontroller means comprising means adapted to interrupt on receiving the first pulse followed by activation of the counter means to count the subsequent pulses for storing in an internal Counter Regsiter;mapping of the stored count to a bit pattern for output to a motor-driving circuitry and finally to the motors of the car for said remote direction control
Importantly, the remote controlled system to operate a battery powered car of the invention comprises said computer means adapted such that each of the arrow keys of said computer keyboard when pressed a distinct value for each key is sent to the parallel port of said computer.
The said microcontroller at the transmitter unit comprise a microcontroller adapted to internally multiply the value of the respective arrow keys and forward number of pulses equal to said key value to one of its port pins.
The system advantageously also includes low -pass filter means adapted to covert the square wave containing said number of pulses which is distinct for all said keys of the computer to a sinusoidal wave which is further fed to said phone line
The said sinusoidal wave from said transmitted unit is received by a cell phone in the receiver unit preferably after passing through a capacitor means and then through a low pass filter for effective reception of the actual signal.
5
The said signal from said low-pass filter is amplified by passing the signal through an n-p-n transistor followed by reconstruction of the amplified output to square wave from the sinusoidal wave by passing through a Schmitt Trigger and thereafter through a Monostable Multivibrator for smoothenmg of the wave for inputting to the microcontroller preferably 89C51 Microcontroller in said receiving unit.
The output of said Multivibrator is operatively connected to both the interrupt pin and the Counter pin of the Microcontroller such that on getting the first pulse , the microcontroller is interrupted and from then onwards the counter is adapted for counting the number the number of pulses appearing next after said first pulse.
The processor is adapted such that on being interrupted by the first pulse, the processor goes to disable interrupt mode where its interrupts are all disabled. The signal sent from the key board is converted to voice frequency and adapted to be sent over a landline telephone or cell phone.
Thus the above system enables a remote controlled system to operate a battery powered car comprising means to fix directions of the movement of a battery powered car in any direction in any field and is further adapted to send pictures of the site through a wireless camera fitted in the car which can be viewed through online video on computer screen.
It would thus be possible by way of the above disclosed remote controlled system for controlling motion of battery powered car to provide for a suitable system whereby battery powered car of any size would be driven by the present system of the invention involving the remote communication between a computer means and the car to be controlled.
6
Thus, the present system of the invention would favour controlling directions of a battery powered car sitting at a computer at the main office by means of a key board. The signal sends from the key board is converted by means of the device connected to the computer to voice frequency that can be sent over a land line telephone for a cell phone. Importantly, the signal sent over the telephone line is adapted to receive by another cell phone connected to the car. The system of the invention thus basically involves a transmitter unit and a receiver unit with the transmitter unit installed at a remote location in a computer while the receiver unit is installed in the car The receiver unit is adapted to be fitted in the car such that it converts the voice frequency received to the cell phone to a signal understandable by the computer.
The details of the invention, its object and advantages are explained hereunder in greater details in relation to non-limiting exemplary illustration as per the following accompanying figures
BRIEF DESCRIPTION OF THE ACCOMAPNYING FIGURES
Figure 1 is a schematic illustration of the system of remote controlled operation of batter powered car in accordance with the invention;
Figure 2 is a circuit diagram illustrating the transmitter unit used in the remote controlled system of the present invention
Figure 3 is a circuit diagram of the receiver unit used in the remote controlled system of the invention.
DETAILED DESCRIPTION OF THE ACCOMPANYING FIGURES:
Reference is first invited to accompanying figure 1 which illustrates schematically the remote controlled system in accordance with the invention
7
As shown in the figure, the system is adapted such that at the transmitter unit a computer based directional instruction is transmitted through a landline or mobile phone which is subsequently received by the receiver unit installed in the car through a mobile or WLL phone for corresponding control of the motion of the vehicle.
Thus, utilizing the above system it is possible that a car motion controlling signal can be sent from the key board which is converted to a voice frequency and sent over a landline telephone or cell phone. The signal sent over the telephone line in the form of voice signal is received by another cell phone connected to the car. The receiver unit in the car is adapted to convert the voice frequency received from the cell phone to a signal which can be accepted by the computer.
Reference is now invited to accompanying figure 2 which illustrates the transmitting unit installed in the computer means in the system of the invention.
As shown in said Figure 2 the transmitter unit is adapted such that whenever any of the arrow keys of the computer keyboard is pressed, a distinct value for each of the keys is sent to the parallel port of the computer. This signal outputted from the computer is firstly fed to a microcontroller (89C51) which internally multiplies the value by a factor (such as 16) and adapted to send a number of pulses equal to this value in one of its port pins. The need of multiplication is that the multiplied value allows the difference between two counts to increase to avoid any sort of erroneous detection on the receiver side. Thus this signal is actually a square wave containing a number of pulses which is distinct for all the keys This square wave is then fed to a low pass filter formed by the resistance-capacitance pair. The low-pass filter is responsible for converting the square wave into a sinusoidal wave which is then fed to a land line telephone or cell phone. The need of conversion of the square wave to sine wave is that a square wave cannot be carried non-
8
erroneously through a phone line. Due to the low-pass filter, the square wave is now converted to a sinusoidal wave which contains still that many waves as the count sent from the microcontroller.
Refernce is now invited to accompanying Figure 3 which illustrates the receiver unit used in the system in accordance with the invention.
As apparent from said Figure 3 ,the sinusoidal wave is received by the cell phone on the receiver side which, as mentioned on the transmitter side, contains a number of waves which is distinct for the distinct keys. This wave is firstly passed through a capacitor as a protection for the cell phone and then to a low-pass filter to avoid any low frequencies that communicate with the actual signal through the cell phone as noise. Without the use of low pass filter there is always a probability that the low frequency noises may get amplified while amplifying the actual signal. Then the amplification of the signal is required which is achieved by passing the signal to an n-p-n transistor. Next, the reconstruction of the square wave from the sinusoidal wave is necessary for taking the input into a microcontroller. So the amplified output is fed to a Schmitt Trigger for converting it into a square wave and then to a Monostable Multivibrator so that the wave is smoothed and no offshoots arise in the wave. The microcontroller (89C51) takes the input from the Multivibrator. Actually the output of the Multivibrator is connected to both the interrupt pin and the Counter pin of the microcontroller, so that on getting the first pulse, the microcontroller is interrupted and from then onwards the Counter is responsible for counting the number of pulses appearing next. These next pulses do not interrupt the processor, since on being interrupted by the first pulse, the processor goes to disable interrupt mode, where its interrupts are all disabled. Thus only the input to the Counter pin is effective which counts the pulses. This count is thus stored in its internal Counter register which is then mapped by the microcontroller program to a bit pattern to be outputted to the motors of the car for its appropriate direction control. Thus this bit pattern which is
9
outputted by the microcontroller is fed to a motor-driving circuitry and finally to the motors of the car for its direction control.
It is thus possible by way of the present invention to provide for a safe and secure remote control system involving computer facilities/means whereby a battery powered car of any size can be driven from a distance which would be effective and enable proper controlling of the motion of the car from a remote location.
Importantly, the remote controlled system is adapted to operate a battery powered car and would not involve the use of the usual (UHF) / VHF) radio frequency bandwidth and would therefore avoid the possibility of interference with any other communication device.
The system would be authentic and accept only the signals from the remote controlled connected to the car and will not accept any sort of signals from any other devices and would advantageously be also free of any problems of hacking and would be safe and reliable for remotely controlling the motion of a battery powered car.
10
WE CLAIM:
1. A remote controlled system to operate a battery powered carjcompnsing:
a transmitter unit comprising
(i) a remote control device operatively connected to a computer means;
(ii) a microcontroller means adapted to multiply the signal output from said computer and adapted such as to non-erroneously carry the signal through an operatively connected phone line;
a receiver unit comprising
(iv) a cell phone adapted to receive the signal from said transmitter unit via said phone line ;
(v) amplification means adapted to amplify the signal thus received and means to provide the same suitable for input to a microcontroller means;
(vi) microcontroller means comprising means adapted to interrupt on receiving the first pulse followed by activation of the counter means to count the subsequent pulses for storing in an internal Counter Regsiter;mapping of the stored count to a bit pattern for output to a motor-driving circuitry and finally to the motors of the car for said remote direction control.
2. A remote controlled system to operate a battery powered car as claimed in claim 1 wherein said computer means is adapted such that each of the arrow keys of said computer keyboard when pressed a distinct value for each key is sent to the parallel port of said computer.
11
A remote controlled system to operate a battery powered car as
claimed in anyone of claims 1 or 2 wherein said microcontroller at the
transmitter unit comprise a 89C51 microcontroller adapted to internally
multiply the value of the respective arrow keys and forward number of
pulses equal to said key value to one of its port pins.
3. A remote controlled system to operate a battery powered car as
claimed in claim 3 comprising low -pass filter means adapted to covert
the square wave containing said number of pulses which is distinct for all
said keys of the computer to a sinusoidal wave which is further fed to
said phone line
4. A remote controlled system to operate a battery powered car as
claimed in anyone of claims 1 to 4 wherein said sinusoidal wave from said
transmitted unit is received by a cell phone in the receiver unit preferably
after passing through a capacitor means and then through a low pass
filter for effective reception of the actual signal.
5. A remote controlled system to operate a battery powered car as
claimed in claim 5 wherein said signal from said low-pass filter is
amplified by passing the signal through an n-p-n transistor followed by
reconstruction of the amplified output to square wave from the sinusoidal
wave by passing through a Schmitt Trigger and thereafter through a
Monostable Multivibrator for smoothening of the wave for inputting to the
microcontroller preferably 89C51 Microcontroller in said receiving unit
6. A remote controlled system to operate a battery powered car as
claimed in claim 6 wherein the output of said Multivibrator is operatively
connected to both the interrupt pin and the Counter pin of the
Microcontroller such that on getting the first pulse , the microcontroller is
interrupted and from then onwards the counter is adapted for counting
the number the number of pulses appearing next after said first pulse.
12
A remote controlled system to operate a battery powered car as
claimed in claim 7 wherein the processor is adapted such that on being
interrupted by the first pulse , the processor goes to disable interrupt
mode where its interrupts are all disabled.
8. A remote controlled system to operate a battery powered car as
claimed in anyone of claims 1 to 8 wherein the signal sent from the key
board is converted to voice frequency and adapted to be sent over a
landline telephone or cell phone.
10. A remote controlled system to operate a battery powered car as
claimed in anyone of claims 1 to 9n comprising means to fix directions of
the movement of a battery powered car in any direction in any field and
further adapted to send pictures of the site through a wireless camera
fitted in the car which can be viewed through online video on computer
screen.
11. A remote controlled system to operate a battery powered car
substantially as herein described and illustrated with reference to the
accompanying figures.
Remote Controlled System to Operate Battery Powered Car
A remote controlled system to operate a battery powered car. The system provides for remote communication between the car to be operated and a computer to control the motion of the battery power car of any size. The system is effective in controlling the direction of the car through the key board of the computer and importantly such control will not involve UHF / VHF radio frequency bandwidth and is therefore free of any interference with any communication device. Advantageously the system of the invention is also adapted such that it is free form any sort of hacking and / or unauthorized access / interference.