DESC:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
A SYSTEM AND METHOD FOR MOMENTARY RELEASE OF LASER BEAM

APPLICANT:
Cereble Private Limited
An Indian entity having address,
S. No. 65, Plot No. 74, Abhinav Society, Padmavati, Pune – 411009,
Maharashtra, India

The following specification particularly describes the invention and the manner which is to be performed.

CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY
The present application claims priority from an Indian patent Application No: 202121012499, filed on 23rd March 2021, incorporated herein by a reference.

TECHNICAL FIELD
The present disclosure relates to the field of a system and method for momentary release of a laser beam in a shooting device, and more particularly to a system and a method for momentary release of a laser beam after filtering and identifying a sound signal using a sound filtering algorithm in a shooting rifle/pistol.
BACKGROUND
The subject matter discussed in the background section should not be assumed to be prior art merely as a result of its mention in the background section. Similarly, a problem mentioned in the background section or associated with the subject matter of the background section should not be assumed to have been previously recognized in the prior art. The subject matter in the background section merely represents different approaches, which in and of themselves may also correspond to implementations of the claimed technology.
Shooting sports is catching up in its popularity by virtue of new technologies. Nowadays laser beam is used instead of pellets for training of rifle/pistol shooting. Professional shooting events have stringent regulations that must be adhered to. The shooter must refrain from taking support from the shooting table while being within the firing point completely. Further, the shooter must stand free with both the feet on the floor. Moreover, the competitive shooting events demand the shooters to keep both the hands behind the trigger guard, albeit the use of two hands. Further, the user is also required to use a constant beam only. As such, momentary pulling of a laser beam becomes inevitable. Thus, this requires the pistol or rifle activation by a loading lever which is to be operated using non-shooting hand. However, the above rule does not rule out the instance of misfiring or false shooting. As shot firing event is the crux of the entire shooting experience, it is prerequisite to accurately detect the shot firing event.
Other systems for detecting a trigger pull are rail mounted devices that are not in contact with the moving internal components. These devices may also pulse a laser but require recording of the shot firing event with an inertial sensor in the rail mounted device. The motion of the whole firearm from the recoil is used to register that the gun has fired. The system is configured to wait on the recoil to detect the firing, the system does not accurately detect the aim-point because the aim-point has been greatly disturbed by the recoil. By the time the laser pulse is fired and measured by a camera system, the weapon has moved substantially from the true aim-point. The resulting inaccuracy is an accepted practice of the industry.
In one of the prior arts, it goes on to disclose a method of detecting a shot firing event of a firearm. In this, the shot firing event is detected by a sensor mounted on the firearm or simulated firearm. For example, an accelerometer may be used or an ultrasonic sensor. Further, in one of its preferred embodiments, the device comprises a housing including a rail interface in the outside of the housing wherein the rail interface is designed to attach to a rail of the firearm; a laser emitter mounted inside the housing; an IMU mounted inside the housing; an ultrasonic sensor located inside the housing and in direct contact with an inside wall of the housing; and a microcontroller in electrical communication with the ultrasonic sensor. Further, the apparatus may further include a pinger located in the firing chamber of the firearm. In order to allow the ultrasonic sensor to more easily distinguish the striking of the hammer, the pinger emits an ultrasonic signature when struck by the hammer of the firearm. This ultrasonic signature from the pinger is easily distinguished by the ultrasonic sensor from other noises in the frequency band. Further, when the firing event is recorded, the simulation system looks backward in time at the history of recorded muzzle position to select the aim-point that corresponded to the delayed firing event that was recorded. Further, the application discloses a method of detecting the aim point of a firearm or weapon simulator by continuously pulsing a laser coaxially aligned to the bore. Further, the ultrasonic sensor is mounted in direct contact with the housing. In such an embodiment, the ultrasonic sensor may be pressed into contact with the housing. The housing is then mounted to the weapon via the rail interface and thus, pressed into contact with the body of the firearm itself. This puts the ultrasonic sensor in vibrational contact with the exterior of the firearm. Placing the ultrasonic sensor in direct contact with the housing of the weapon simulator module, increases the sensitivity, or signal to noise ratio, of the system and allows the ultrasonic sensor to more easily detect a trigger pull. However, this prior art further states that in cases where the ultrasound from the hammer strike is difficult to discriminate against, a battery powered or piezo-electric ultrasound pinger with a switch can be placed into the chamber. In this case, when the hammer strikes, the pinger will be triggered to emit a unique tuned resonant ultrasonic tone. This tone will be clearly distinguishable from other naturally occurring acoustic emissions. This tone will transmit through the body of the weapon and be read by the ultrasonic microphone that is located in the weapon simulator module.
Therefore, within this reference itself, it is evident that the ultrasonic signature from the pinger is not that easily distinguished from other environmental noises by the ultrasonic sensor because of which a battery powered or piezo-electric ultrasound pinger with a switch is provided inside the chamber which will in turn produce a uniquely tuned resonant ultrasonic tone which will be read by the ultrasonic microphone. This increases complexity and thus, calls for a need to have a wholesome solution which can accurately detect trigger pulling and momentarily fire the laser beam.
Further, in another prior art, an electronic sensing system is disclosed using a piezoelectric element and an electronic logic system by detecting and analysing the shockwaves that propagate through the material of the weapon from the explosive expansion of gasses that accelerate a projectile along a barrel and/or by detecting and analysing the mechanical transients of the weapons action during and around discharge and reporting that event to further systems. Further, the present invention utilises a digitally controlled logic element consisting of a combination of electronically configurable analogue filters to isolate frequency and digital logic to evaluate pulse duration and spacing. The filter stage evaluates the crude characteristics of an event and if within frequency and amplitude thresholds determined by the type of firearm and location of sensor, passes the signal to the digital logic, which evaluates the signal for pulse width, amplitude and duration and returns an output value corresponding to shot or no-shot. Further, due to the presence of several sounds in the background, the microphone is configured to capture the noises and sounds and with each sound, it may lead to early release of the laser beams because the microprocessor was unable to accurately filter and identify the trigger pulling sound apart from other noises.
Therefore, the reference fails to disclose filtering and distinguishing the trigger sound from other environmental noises. Therefore, there is a long-standing need of equipping the firearms with a certain mechanism that can accurately detect trigger pulling and momentarily fire the laser beam.

SUMMARY
Before the present system and device and its components are described, it is to be understood that this disclosure is not limited to the particular system and its arrangement as described, as there can be multiple possible embodiments which are not expressly illustrated in the present disclosure. It is also to be understood that the terminology used in the description is for the purpose of describing the versions or embodiments only and is not intended to limit the scope of the present application. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in detecting or limiting the scope of the claimed subject matter.
In one implementation, the present disclosure describes about a trigger pulling sound detection system for enabling momentary pulling of a laser beam. The system may be enabled over a laser shooting pistol or rifle. The system may comprise a microphone, a microcontroller, a trigger, a trigger toggle, a battery, and a laser. The microphone may be configured to detect a sound signal in and around the laser shooting pistol or rifle. A microphone captures the sound signal and transmits the same to the microcontroller. The microcontroller enables a sound processing algorithm configured to detect the trigger pulling sound by analyzing the sound signal. Further, the sound processing algorithm may use Fast Fourier Transforms to filter and identify the trigger pulling sound accurately from other environmental noises. Once the microcontroller generates a laser beam actuation signal, the laser proceeds to momentarily pulling a laser beam.
In another implementation, the present disclosure describes a method of momentary pulling of the laser beam once the trigger is pulled. Once the shooter actuates the trigger, a sound signal of trigger is generated. The microphone captures the sound signal which is then transmitted to the microcontroller. The microcontroller processes the sound signal using a sound processing algorithm. This sound signal is then filtered and identified accurately amidst other environmental noises by the sound processing algorithm. Once the sound signal is filtered and identified, the laser proceeds to activate and pulling a laser beam.

BRIEF DESCRIPTION OF DRAWINGS
The detailed description is described with reference to the accompanying Figures. In the Figures, the digit(s) of a reference number identifies the Figure in which the reference number first appears. The same numbers are used throughout the drawings to refer like features and components.

Figure 1a illustrates the various components of a shooting device 100, in accordance with an embodiment of the present subject matter.

Figure 1b illustrates a sequence of releasing a laser beam once the trigger is pulled in the shooting device 100, in accordance with an exemplary embodiment of the present subject matter.

Figure 2 illustrates the method of momentary release of a laser beam of the shooting device 100, in accordance with an exemplary embodiment of the present subject matter.

DETAILED DESCRIPTION
Reference throughout the specification to “various embodiments,” “some embodiments,” “one embodiment,” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases “in various embodiments,” “in some embodiments,” “in one embodiment,” or “in an embodiment” in places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.
The words "comprising," "having," "containing," and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items or meant to be limited to only the listed item or items.
It must also be noted that, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Although any methods similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary methods are described. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms.
Fig 1a and 1b illustrate two schematic diagrams of components present in a shooting device 100, more specifically the shooting device 100 encompasses a laser pistol or a laser rifle, in accordance with the present invention. The shooting device 100 comprises a trigger 111, a microphone 120, and a microcontroller 130. Further, a battery unit 170 along with a battery indicator 160, and a laser 140 are also present. Additionally, a trigger toggle 180, and an inbuilt buzzer for alerts to the shooter may also be integrated into the shooting device 100.
In one of the embodiments, the shooting device 100 is a semiconductor laser type pistol or a laser type rifle having a Class 1 laser with a Laser Divergence of upto 1 mrad. Both, the laser pistol and the laser rifle are configured to have a laser wavelength of 650nm with a fluctuation margin between + 5 %. Further, the dot created by the laser beam 140 projected on the target has a laser dot diameter of 5 mm with a margin of +5% for a shooting range of 10m for a 3mm diameter of laser’s lens output aperture.
In the present invention, the laser output power of shooting device 100 is 4mW for a momentary laser emission duration of 30ms. Further, the operating temperatures is in a range of 00C to 500C for getting optimal results. Further, the battery configuration used in various shooting modes requires the need of in-built charging configuration, herein a charging port of USB C type. For the laser pistol, the battery is configured to be a 16340, 880 mAh Li-Ion Cell for providing ~ 15 hours or ~ 900 shots per battery charge. The charging power supply is 5V. For the laser rifle, the battery is configured to be an 18650, 2200 mAh Li-ion Cell for providing ~ 20 hours or ~ 1200 shots per battery charge. The charging power supply remains the same as laser pistol 5V.
In one exemplary embodiment, the microcontroller 130 consists of 256KB of Flash and SRAM up to 32KB. The microcontroller 130 is installed with a specification of 32-Bit ARM Cortex M0+ running at 48MHz. The Microcontroller 130 has a sound filtering algorithm 150 that uses Fast Fourier Transforms to identify the trigger pulling event accurately and filter out other environmental noises.
In a preferred embodiment of the present invention, the shooting device 100 comprises a trigger 111 which produces a sound signal when the trigger 111 is pulled, a microphone 120, which is configured to detect the sound signal generated by the trigger 111. Additionally, the microcontroller 130 continuously monitors the sound signals received from the environment with the help of the microphone 120. The algorithm 150 inside the microcontroller 120 is able to differentiate between environmental noise, loading sound and shot sound (sound signal that is produced by a trigger pulling event). When a shot sound is detected, it turns on the laser momentarily. During the capture of the sound signal of the trigger pulling, different background noises also get captured which needs to be processed and filtered. The shooting device 100 further comprises a microcontroller 130 which receives the sound signal from the microphone 120. The microcontroller 130 filters and identifies the trigger pulling sound amidst other noises. Further, the microcontroller 130 generates an actuation signal for the laser 140 to activate and momentarily release a laser beam. Further, the shooting device consists a laser 140 which is disposed at the front of the shooting device 100. As soon as the laser 140 receives the actuation signal from the microcontroller 130, the laser 140 activates a beam of laser for a very shot pulse of time.
Now, referring figure 2, a flow chart 200 is further illustrated to provide a method for a momentary release of a laser beam. The present subject matter proposes a method that may be used in competitive professional shooting sports for 10-metre rifle and pistol shooting and Pentathlon Laser Run designed for both right and left-handed athletes.
At step S210, the microphone 120 captures the sound signal produced by the trigger 111. The microphone 120 is configured to capture a sound signal which is generated by the event of the trigger 111 pulling. As the trigger 111 is pulled, a sound is produced which is picked by the microphone 120 which is housed inside the shooting device 100.
At step S220, transmission of the sound signal by the microphone 120 to a microcontroller 130 takes place. Once the microphone 120 picks up or catches the sound signal, it passes on to the microcontroller 130 for further analysis and processing.
At step S230, processing the sound signal to filter and identify the trigger pulling sound accurately. The microcontroller 130 analyses the sound signal transmitted by the microphone 120 with the help of a sound processing algorithm 150. The sound processing algorithm 150 processes different sounds in the environment.
At step S240, filtering of the sound signal takes place to distinguish the sound signal from other environmental noises. The microcontroller 130 executes the sound processing algorithm 150 to filter the sound signal using a Fast Fourier Transforms. The Fast Fourier Transforms is enabled to filter and identify the trigger pulling accurately from other environmental noises.
At step S250, activating and momentary pulling of a laser beam takes place once the trigger 111 is pulled.
The embodiments, examples and alternatives of the preceding paragraphs, the description, including any of their various aspects or respective individual features, may be taken independently or in any combination. Features described in connection with one embodiment are applicable to all embodiments, unless such features are incompatible. Although implementations of the sound filtering algorithm 150 on a 32-Bit microcontroller 130 for the detection of the trigger pulling sound of a laser pistol/rifle (shooting device 100) based upon detection of sound via microphone 120 have been described in language specific to structural features and/or methods, it is to be understood that the specifications are not necessarily limited to the specific features or methods described. Rather, the specific features and methods are disclosed as examples of implementations of the system and the device for facilitating momentary pulling of a laser beam after the detection of trigger sound.
Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. However, one of ordinary skill in the art will readily recognize that the present disclosure is not intended to be limited to the embodiments illustrated but is to be accorded the widest scope consistent with the principles and features described herein.
The foregoing description shall be interpreted as illustrative and not in any limiting sense. A person of ordinary skill in the art would understand that certain modifications could come within the scope of this disclosure.
The embodiments, examples and alternatives of the preceding paragraphs or the description and drawings, including any of their various aspects or respective individual features, may be taken independently or in any combination. Features described in connection with one embodiment are applicable to all embodiments, unless such features are incompatible.
,CLAIMS:WE CLAIM:
1. A shooting device (100) comprising:
a trigger (111) configured to generate a sound signal, wherein a trigger (111) is pulled to produce the sound signal;
a microphone (120) configured to detect the sound signal;
a microcontroller (130) configured to receive the sound signal from the microphone (120), wherein the microcontroller (130) is configured to filter the sound signal to identify the event of trigger (111) pulling, and wherein the microcontroller (130) is configured to generate a laser beam actuation signal;
a laser (140) configured to receive the laser beam activation signal, and wherein the laser (140) is configured to emit a laser beam for a pre-defined time.

2. A shooting device (100) as claimed in claim 1, wherein the microcontroller (130) is configured to filter the sound signal with a sound processing algorithm (150), wherein the sound processing algorithm (150) uses Fast Fourier Transforms.

3. A shooting device (100) as claimed in claim 1, wherein the shooting device (100) is configured to have a laser wavelength of 650nm within a fluctuation margin of + 5 %.

4. A shooting device (100) as claimed in claim 1, wherein the dot created by the laser beam projected on the target has a laser dot diameter of 5 mm with a fluctuation margin of +5% for a shooting range of 10m wherein the laser’s lens output aperture diameter is 3mm of a shooting device (100).

5. A shooting device (100) as claimed in claim 1, wherein the shooting device (100) has a laser output power of 4mW for a momentary laser release for a duration of 30micro-seconds.

6. A shooting device (100) as claimed in claim 1, wherein the shooting device (100) has an operating temperature ranging between 00C to 500C.

7. A shooting device (100) as claimed in claim 1, wherein the shooting device (100) comprising the microcontroller (130) has a configuration of 32-Bit ARM Cortex M0+ running at 48MHz along with 256KB of Flash and SRAM up to 32KB.

8. A shooting device (100) as claimed in claim 1, wherein the battery unit (170) for the laser pistol and the rifle have a battery configuration of 18650, 2200 mAh Li-Ion Cell for providing ~ 20 hours or ~ 1200 shots per battery charge.

9. A method for momentary release of a laser beam in a shooting device (100), the method comprising the steps of:
(S210) capturing a sound signal by a microphone (120), wherein the sound signal is produced by a trigger pulling event;
(S220) transmitting the sound signal to a microcontroller (130) by the microphone ((120);
(S230) processing the sound signal by the microcontroller (130) using a sound processing algorithm (150) to identify the trigger release sound accurately;
(S240) filtering and identifying the sound signal to distinguish the sound signal from other environmental noises; and
(S250) activating and releasing a laser beam for a pre-defined time after the occurrence of the trigger pulling event when the laser (140) receives the laser beam activation signal.

Dated 23rd Day of March 2021
Priyank Gupta
Agent for the Applicant
IN/PA-1454