A control system for safe firing of a machine gun

Abstract

The present invention provides a control system for safe shooting of a machine gun, which relates to the technical field of light weapons. The specific scheme of the device is as follows: install the machine gun at the middle position of the cradle, and install an electric lead screw mechanism and a photoelectric sensor on the side of the machine gun. Install a front contact position sensor and a rear contact position sensor on the electric lead screw mechanism to sense the position of the nut of the electric lead screw mechanism, and install a photoelectric sensor below the cartridge ejection port of the machine gun to sense the dropping of misfired cartridges and cartridge cases. Install a firing electromagnet at the tail of the machine gun to release the limit of the bolt carrier by the release. The single-chip microcomputer (or DSP) is electrically connected to the electric lead screw mechanism, the front contact position sensor, the rear contact position sensor, the photoelectric sensor and the firing electromagnet, and the single-chip microcomputer (or DSP) is electrically connected to the display device, the keyboard and the memory. Input control instructions to the single-chip microcomputer (or DSP) through the keyboard to realize bolt opening, shooting, safe shooting control of the machine gun and handling of misfired cartridges. The structure is simple and the operation is safe.

Description

Technical Field

[0001] The present invention relates to the technical field of light weapons, and particularly relates to a control system for safe shooting of machine guns. Background Art

[0002] After a machine gun remote weapon station is integrated on a mobile or fixed platform, it generally adopts an unmanned remote operation mode. After the machine gun bolts are opened and the bullets are loaded, the machine gun will always be in a state of being ready to fire. When a threat is detected, due to reasons such as misoperation, vehicle vibration, or power failure, the bullets ready to fire in the machine gun may accidentally fire, posing a safety threat to non-combatants. In addition, due to non-standard operations in the production, processing, storage, and transportation of bullets, misfiring bullets often occur in the purchased bullets. Since the remote operation mode is adopted, personnel in the battlefield environment cannot perform manual disposal in time, resulting in the problem of inability to fire normally. There is no publicly published relevant content for this technology abroad. Summary of the Invention

[0003] The purpose of the present invention is: aiming at the problems of how to avoid accidental firing after the machine gun bolts are opened and how to handle misfiring bullets, the present invention provides a control system for safe shooting of machine guns that can achieve safe bullet waiting to fire and has the ability to automatically dispose of misfiring bullets.

[0004] The technical solution of the present invention is: a control system for safe shooting of machine guns, characterized in that it includes: an electric lead screw mechanism, a front contact position sensor, a rear contact position sensor, an optoelectronic sensor, a firing electromagnet, and a control unit; the machine gun as the control object is installed on the cradle.

[0005] The electric lead screw mechanism is used to push the bolt carrier to move backward along the length direction of the machine gun, and then push the bolt to move backward; the front contact position sensor is installed on the electric lead screw mechanism corresponding to the forward limit position of the nut of the electric lead screw, the rear contact position sensor is installed on the electric lead screw mechanism corresponding to the backward limit position of the nut of the electric lead screw, and the optoelectronic sensor is installed in the ejection channel of the cradle.

[0006] The firing electromagnet is installed at the tail of the machine gun, and when it is energized, it can release the limit of the bolt carrier by the release.

[0007] A spring is installed between the bolt carrier and the rear part of the machine gun housing, and the spring is compressed when the bolt carrier and the bolt move backward.

[0008] The electric lead screw mechanism is controlled by the control unit; the front contact position sensor, the rear contact position sensor, and the optoelectronic sensor respectively send detection signals to the control unit; the firing electromagnet is energized or de-energized under the control of the control unit.

[0009] As a preferred embodiment of the present invention, when the machine gun needs to unlock, an unlocking command is input to the control unit. The control unit receives the signal from the front contact position sensor sensing the nut of the electric lead screw at the front contact position, and sends a forward movement command to the electric lead screw mechanism. The electric lead screw mechanism pushes the bolt carrier backward. The bolt carrier presses against the bolt and moves it backward. The nut of the electric lead screw moves backward to the rear contact position. The rear contact position sensor sends a signal to the control unit indicating that the nut of the electric lead screw is at the rear contact position. The bolt carrier is limited by the disconnector at the rear extreme position, and the spring at the rear end of the bolt carrier is compressed. The control unit receives the signal that the nut of the electric lead screw is at the rear contact position, sends a reverse movement instruction to the electric lead screw mechanism. The nut on the lead screw of the electric lead screw mechanism moves forward. The front contact position sensor sends a signal to the control unit indicating that the nut of the electric lead screw is at the front contact position. After receiving the signal, the control unit sends a stop movement command to the electric lead screw mechanism, and the electric lead screw mechanism stops working, and the unlocking is completed.

[0010] As a preferred embodiment of the present invention, when the machine gun needs to fire, a firing instruction is input to the control unit. The control unit sends an energization command to the firing electromagnet. The energization of the firing electromagnet releases the limit on the bolt carrier by the disconnector. The bolt carrier drives the bolt to quickly rush forward under the action of the spring restoring force. The bolt drives the firing pin to quickly rush forward. The firing pin hits the bottom of the bullet to complete the firing action.

[0011] As a preferred embodiment of the present invention, when the machine gun needs to be in the cocked and safe control state after completing the unlocking action and before firing or after firing: At this time, the bolt carrier is at the rear extreme position. A safe cocked instruction is input to the control unit. The control unit sends a forward movement command to the electric lead screw mechanism. The electric lead screw mechanism receives the command and the nut on the electric lead screw mechanism moves backward to the rear contact position. The rear contact position sensor sends a signal to the control unit indicating that the nut of the electric lead screw is at the rear contact position. The control unit sends a stop movement instruction to the electric lead screw mechanism. At this time, the bolt carrier restricts the bolt from moving forward, and the bullet is in the state of being ready to fire.

[0012] As a preferred embodiment of the present invention, after the firing process, when the photoelectric sensor does not detect the falling of a cartridge case within the set time, this signal is sent to the control unit, determining that this round of bullet is a misfire bullet, inputting a misfire bullet disposal instruction to the control unit. After receiving the misfire bullet disposal instruction, the control unit sends a forward movement instruction to the electric lead screw mechanism and a power-off instruction to the firing electromagnet. The electric lead screw mechanism pushes the bolt carrier backward, and the bolt carrier holds the bolt and moves backward. If during the backward movement of the bolt carrier, the misfire bullet is successfully ejected and touches the photoelectric sensor, the photoelectric sensor sends a signal to the control unit to confirm that the misfire bullet has been successfully ejected; the nut of the electric lead screw mechanism moves to the rear contact position, and the rear contact position sensor sends a signal to the control unit indicating that the nut of the electric lead screw is at the rear contact position. After receiving the signal that the rear contact is in place sent by the rear contact position sensor, the control unit sends a stop movement instruction to the electric lead screw mechanism, and the electric lead screw mechanism stops moving. The bolt carrier is limited by the disconnector at the rear limit position to complete the secondary bolt opening, and the system completes the misfire bullet processing action.

[0013] As a preferred embodiment of the present invention, it further includes a keyboard. The keyboard is connected to the control unit as an instruction input device. The control unit receives the instructions input by the keyboard and transmits the commands to the electric lead screw mechanism and the firing electromagnet.

[0014] As a preferred embodiment of the present invention, the electric lead screw mechanism uses a trapezoidal lead screw as the transmission component and has a self-locking function.

[0015] As a preferred embodiment of the present invention, it further includes a display device. The control unit counts the total number of misfire bullets and the total number of fired bullets by sensing the photoelectric on-off signal of the photoelectric sensor and displays them on the display device.

[0016] As a preferred embodiment of the present invention, it further includes a storage device. The control unit counts the total number of misfire bullets and the total number of fired bullets by sensing the photoelectric on-off signal of the photoelectric sensor and transmits them to the storage device for storage. The control unit can retrieve the data stored in the storage device in real time.

[0017] Beneficial effects:

[0018] (1) This system uses a single-chip microcomputer or DSP to send commands to the electric lead screw mechanism to control the bolt opening, shooting of the machine gun, and the safe cocking of the bullet. During the safe cocking process of the bullet, the electric lead screw mechanism restricts the movement of the bolt carrier and further restricts the movement of the bolt to avoid accidental firing of the bullet.

[0019] (2) This system can detect misfire bullets during the firing process and can control the bolt carrier to perform secondary bolt opening to eject the misfire bullet by controlling the electric lead screw mechanism.

[0020] (3) The trapezoidal lead screw on the electric lead screw mechanism has a self-locking function, which can ensure that the bolt carrier cannot move during the safe cocked state of the bullet.

[0021] (4) The photoelectric sensor at the shell ejection port below the machine gun can determine whether the bullet is a dud. By sensing the dud bullet and the shell ejection behavior, it transmits the on-off signal to the single-chip microcomputer (or DSP). The single-chip microcomputer (or DSP) can process the on-off signal to count the number of dud bullets and shells.

[0022] (5) This system has a display device and a storage device. The display device can display the number of fired bullets, the number of dud bullets, and whether there is a dud bullet. The number of fired bullets and the number of dud bullets can be stored in the storage device and retrieved in real time. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the control circuit composition of this system;

[0024] Figure 2 is a diagram of the bolt carrier at the front contact position and the machine gun in the unbolted state;

[0025] Figure 3 is a diagram of the bolt carrier at the rear contact position, after unbolting and in the cocked state;

[0026] Among them: 1 - firing electromagnet; 2 - rear contact position sensor; 3 - bolt; 4 - bolt carrier; 5 - bullet; 6 - front contact position sensor; 8 - photoelectric sensor; 9 - control unit; 10 - display device; 11 - keyboard; 12 - memory. Detailed Implementation Manner

[0027] The following further elaborates on the present invention in conjunction with the drawings and embodiments.

[0028] This embodiment provides a control system for safe shooting of a machine gun, as Figure 1 and Figure 2 shown. This device includes: an electric lead screw mechanism, a firing electromagnet 1, and a control circuit; the objects of safe shooting control are the machine gun and the bullet 5.

[0029] See the attached Figure 1, the control circuit includes: a front contact position sensor 6, a rear contact position sensor 2, a photoelectric sensor 8, a control unit 9, a communication circuit, a memory 12, a keyboard 11, and a display device 10; wherein the control unit 9 uses a single-chip microcomputer or a DSP, and the memory 12 uses an EEPROM storage device; wherein the front contact position sensor 6 and the rear contact position sensor 2 are used as proximity switches and are electrically connected to the control unit 9 for sending detection signals of the nut position of the electric lead screw to the control unit 9; the photoelectric sensor 8 is used as a photoelectric switch and is electrically connected to the control unit 9 for sending a detection signal of whether the cartridge case is successfully ejected to the control unit 9; the memory 12 is electrically connected to the control unit 9 and can perform two-way information transmission with the control unit 9. The storage device 12 is used to record the number of misfires and back up functional parameters, and the data stored therein can be called by the control unit 9 in real time after power-on; the display device 10 is electrically connected to the control unit 9, and the control unit 9 can send the number of fired bullets 5, the number of misfires, and the position information of the bolt carrier 4 to the display device 10 for display; the keyboard 11 is electrically connected to the control unit 9 and is used to input control instructions to the control unit 9 through the keyboard 11 to complete bolt opening, safe cocking, and misfire processing; the host computer is connected to the control unit 9 through a bus (such as a CAN bus or a 422, 232 bus) for interaction and can perform two-way information transmission with the control unit 9 to complete various complex control functions.

[0030] See the appendix Figure 2, The machine gun, which is the control object, is installed on the cradle. An electric lead screw mechanism, a photoelectric sensor 8, a front contact position sensor 6, and a rear contact position sensor 2 are installed on one side of the cradle. The electric lead screw mechanism is used to push the bolt carrier 4 to move backward along the length direction of the machine gun (the nut in the electric lead screw mechanism abuts against the front end face of the protrusion below the bolt carrier 4 but is not connected. When the nut moves backward along the length direction of the machine gun, it pushes the bolt carrier 4 to move synchronously. When the nut moves forward, it does not drive the bolt carrier 4 to move forward). The photoelectric sensor 8 is installed in the ejection channel of the cradle. In this example, it is specifically installed below the ejection port of the machine gun. The photoelectric sensor 8 is a non-contact type, and it senses the dropping behavior of misfired cartridges or cartridge cases through photoelectric on-off signals. When a misfired cartridge or a cartridge case drops, the photoelectric sensor 8 will output an on-off signal, which is connected to the control unit 9 through a communication circuit. The control unit 9 can receive the on-off signal of whether the cartridge case is successfully ejected detected by the photoelectric sensor 8, make a logical judgment, and count the number of misfired cartridges and the total number of successfully ejected cartridge cases through the signal transmitted by the photoelectric sensor 8, and transmit the calculation result to the display device 10 for display and store it in the storage device 12. The front contact position sensor 6 is installed at the set front contact position on the electric lead screw mechanism, and the rear contact position sensor 2 is installed at the set rear contact position on the electric lead screw mechanism. The front contact position sensor 6 and the rear contact position sensor 2 are non-contact type. The front contact position corresponds to the forward limit position of the movement of the nut in the electric lead screw mechanism, and the rear contact position corresponds to the rear limit position of the movement of the nut in the electric lead screw mechanism. The front contact position sensor 6 and the rear contact position sensor 2 are responsible for collecting the in-place signals of the nut on the electric lead screw mechanism. When the nut on the electric lead screw reaches or leaves the front contact position and the rear contact position, the position sensors at the corresponding positions will be turned on or off, and their signals are transmitted to the control unit 9 through a communication circuit. After data processing by the control unit 9, the results are displayed on the display device 10. If a counting error occurs, the control unit 9 can manually clear the count or manually input the total number of misfired cartridges.

[0031] See the appendix Figure 2 , A spring is installed between the rear end of the bolt carrier 4 and the rear part of the machine gun housing, that is, one end of the spring abuts against the bolt carrier 4, and the other end abuts against the rear end of the machine gun. When the electric lead screw mechanism drives the nut on the lead screw to move backward through the rotation of the motor, it pushes the bolt carrier 4 to move backward synchronously. The bolt carrier 4 presses against the bolt 3 to move backward. When the nut moves to the rear contact position, both the bolt 3 and the bolt carrier 4 move to the rear limit position. After the bolt carrier 4 moves to the rear limit position, it is limited at the rear limit position by the release. During this process, the spring at the rear end of the bolt carrier 4 is compressed. A firing electromagnet 1 is installed at the tail of the machine gun. The control unit 9 controls whether the firing electromagnet 1 is energized through a communication circuit. When the firing electromagnet 1 is energized, it can activate the release to release the bolt carrier 4.

[0032] When the machine gun needs to unlock, a unlock command is input to the control unit 9 through the keyboard 11. After the control unit 9 confirms that the nut of the electric lead screw is at the front contact position, it sends a forward movement command to the electric lead screw mechanism. After the electric lead screw mechanism is started, the nut on the lead screw is driven by the motor to move backward. The nut pushes the bolt carrier 4 backward, and the bolt carrier 4 holds the bolt 3 and moves it backward. When the nut of the electric lead screw moves to the rear contact position, the rear contact position sensor 2 sends a signal indicating that the backward movement is in place to the control unit 9. At this time, both the bolt 3 and the bolt carrier 4 move to the rear limit position. The bolt carrier 4 is limited to the rear limit position by the release, and the spring at the rear end of the bolt carrier 4 is compressed. After the control unit 9 receives the in-place signal sent by the rear contact position sensor 2, it sends a reverse movement instruction to the electric lead screw mechanism. The electric lead screw mechanism drives the nut on the lead screw to move forward through the motor until the nut moves to the front contact position. After the control unit 9 receives the forward movement in-place signal sent by the front contact position sensor 6, the control unit 9 sends a stop movement command to the electric lead screw mechanism, and the electric lead screw mechanism stops working, completing the unlock action. At this time, the bullet 5 of the machine gun drives the cartridge feeding mechanism through the bolt carrier 4 to load the bullet 5 into the chamber, thus completing the unlock action, and the bullet 5 is in the state of being ready to fire.

[0033] When the machine gun needs to fire, a firing instruction is input to the control unit 9 through the keyboard 11. The control unit 9 sends a power-on command to the firing electromagnet 1 through the communication circuit. The firing electromagnet 1 is powered on and starts to release the bolt carrier 4 by the release. The bolt carrier 4 drives the bolt 3 to quickly rush forward under the action of the spring return force. The bolt 3 drives the firing pin to quickly rush forward, and the firing pin hits the bottom of the bullet 5 to complete the firing action. During the firing process, the cartridge case drops, and the photoelectric sensor 8 will output a on-off signal, transmit the data to the control unit 9 and display it on the display device 10.

[0034] When the machine gun needs to implement safety firing control after completing the unlock action, at this time, the bolt carrier 4 is at the rear limit position, and the bullet 5 is in the state of being ready to fire. To ensure that the bolt carrier 4 will not drive the bolt 3 to rush forward, the operator inputs a safety firing control instruction to the control unit 9 through the keyboard 11. See Appendix Figure 3 , the control unit 9 sends a forward movement command to the electric lead screw mechanism. The electric lead screw mechanism drives the nut to move backward through the motor. When the nut moves to the rear contact position, when the control unit 9 receives the backward movement in-place signal sent by the rear contact position sensor 2, it sends a stop movement instruction to the electric lead screw mechanism. At this time, due to the self-locking function of the trapezoidal lead screw, the bolt carrier 4 cannot move forward, and the bolt carrier 4 restricts the bolt 3 from moving forward, and the system completes the safety firing control instruction.

[0035] After the threat target in front is eliminated, to prevent misfiring of the bullet 5, the operator inputs a safety shooting control instruction to the control unit 9 through the keyboard 11. The control unit 9 issues a power-off command to the firing electromagnet 1. The bolt carrier 4 is limited by the release when it moves to the rear extreme position, and then the above process is repeated.

[0036] When a misfired bullet needs to be dealt with during the firing process, if the bolt 3 and the firing pin quickly move forward and the bullet 5 does not detonate, and the photoelectric sensor 8 does not detect the dropping of the cartridge case within the set time, this signal is transmitted to the control unit 9 through the communication circuit, and it is determined that this round of bullet 5 is a misfired bullet. The control unit 9 sends a misfired bullet display instruction to the display device 10. When the operator sees the misfired bullet display instruction, the operator inputs a misfired bullet disposal instruction to the control unit 9 through the keyboard 11. After receiving the misfired bullet disposal instruction, the control unit 9 issues a forward movement instruction to the electric lead screw mechanism and a power-off instruction to the firing electromagnet 1. The electric lead screw mechanism drives the nut on the lead screw to move backward through the motor, and the nut pushes the bolt carrier 4 to move backward. The bolt carrier 4 pushes the bolt 3 to move backward. If during the backward movement of the bolt carrier 4, the misfired bullet is successfully ejected and touches the photoelectric sensor 8, the photoelectric sensor 8 transmits the signal to the control unit 9 through the communication circuit to confirm that the misfired bullet has been successfully ejected; when the nut moves to the rear contact position, after the control unit 9 receives the rear contact in-place signal sent by the rear contact position sensor 2, it sends a stop movement instruction to the electric lead screw mechanism. The bolt carrier 4 moves to the rear extreme position and is limited by the release, indicating that the system mechanism operates normally, completing the secondary bolt opening, and the next round of ammunition is in the state of being ready to fire, and the system completes the misfired bullet handling action.

[0037] Although the present invention has been described in detail with general descriptions and specific embodiments above, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A control system for the safe shooting of a machine gun, characterized in that, Including: An electric lead screw mechanism, a front contact position sensor, a rear contact position sensor, an optoelectronic sensor, a firing electromagnet, and a control unit; the machine gun as the control object is mounted on the cradle; The electric lead screw mechanism is used to push the bolt carrier to move backward along the length direction of the machine gun, and further push the bolt to move backward; the front contact position sensor is mounted on the electric lead screw mechanism corresponding to the forward movement limit position of the nut of the electric lead screw, the rear contact position sensor is mounted on the electric lead screw mechanism corresponding to the backward movement limit position of the nut of the electric lead screw, and the optoelectronic sensor is mounted in the ejection channel of the cradle; The firing electromagnet is mounted at the tail of the machine gun, and when it is energized, it can release the limit of the bolt carrier by the disconnector; A spring is installed between the bolt carrier and the rear part of the machine gun housing, and the spring is compressed when the bolt carrier and the bolt move backward; The electric lead screw mechanism is controlled by the control unit; the front contact position sensor, the rear contact position sensor, and the optoelectronic sensor respectively send detection signals to the control unit; the firing electromagnet is energized or de-energized under the control of the control unit; When the machine gun needs to unlock, an unlock command is input to the control unit. The control unit receives the signal of the front contact position sensor sensing the nut of the electric lead screw at the front contact position, and sends a forward movement command to the electric lead screw mechanism. The electric lead screw mechanism pushes the bolt carrier to move backward, the bolt carrier pushes the bolt to move backward, the nut of the electric lead screw moves backward to the rear contact position, and the rear contact position sensor sends a signal of the nut of the electric lead screw at the rear contact position to the control unit. The bolt carrier is limited by the disconnector at the rear limit position, and the spring at the rear end of the bolt carrier is compressed. The control unit receives the signal of the nut of the electric lead screw at the rear contact position, sends a reverse movement instruction to the electric lead screw mechanism, the nut on the lead screw of the electric lead screw mechanism moves forward, the front contact position sensor sends a signal of the nut of the electric lead screw at the front contact position to the control unit, and after receiving the signal, the control unit sends a stop movement command to the electric lead screw mechanism, and the electric lead screw mechanism stops working, and the unlocking is completed.

2. The control system for safe firing of a machine gun according to claim 1, characterized in that, When the machine gun needs to fire, a firing instruction is input to the control unit. The control unit sends an energizing command to the firing electromagnet. The firing electromagnet is energized to release the limit of the bolt carrier by the disconnector. The bolt carrier drives the bolt to quickly rush forward under the action of the spring return force, the bolt drives the firing pin to quickly rush forward, and the firing pin hits the bottom of the bullet to complete the firing action.

3. The control system for safe firing of a machine gun according to claim 1, characterized in that, When the machine gun needs to be in the cocked and safe control state after completing the unlocking action and before firing or after firing: at this time, the bolt carrier is at the rear limit position. An instruction for cocked and safe is input to the control unit. The control unit sends a forward movement command to the electric lead screw mechanism. After receiving the command, the electric lead screw mechanism, the nut on it moves backward to the rear contact position, and the rear contact position sensor sends a signal of the nut of the electric lead screw at the rear contact position to the control unit. The control unit sends a stop movement instruction to the electric lead screw mechanism. At this time, the bolt carrier restricts the bolt from moving forward, and the bullet is in the state of being ready to fire.

4. The control system for safe shooting of a machine gun as claimed in claim 1, wherein, After the firing process, when the photoelectric sensor does not detect the dropping of a cartridge case within the set time, it sends this signal to the control unit, determines that this round of ammunition is a misfire, inputs a misfire disposal instruction to the control unit. After receiving the misfire disposal instruction, the control unit sends a forward movement instruction to the electric lead screw mechanism and a power-off instruction to the firing electromagnet. The electric lead screw mechanism pushes the bolt carrier backward, and the bolt carrier holds the bolt and moves backward. If during the backward movement of the bolt carrier, the misfired cartridge is successfully ejected and triggers the photoelectric sensor, the photoelectric sensor sends a signal to the control unit to confirm that the misfired cartridge has been successfully ejected; the nut of the electric lead screw mechanism moves to the rear contact position, and the rear contact position sensor sends a signal to the control unit indicating that the nut of the electric lead screw is in the rear contact position. After receiving the signal that the rear contact is in place sent by the rear contact position sensor, the control unit sends a stop movement instruction to the electric lead screw mechanism, and the electric lead screw mechanism stops moving. The bolt carrier is limited by the disconnector at the rear extreme position, completing the secondary bolt opening, and the system completes the misfire processing action.

5. The control system for safe firing of a machine gun according to any one of claims 1-4, characterized in that, It further includes a keyboard. The keyboard is connected to the control unit as an instruction input device. The control unit receives the instructions input by the keyboard and transmits the commands to the electric lead screw mechanism and the firing electromagnet.

6. The control system for safe shooting of a machine gun according to any one of claims 1-4, characterized in that, The electric lead screw mechanism uses a trapezoidal lead screw as the transmission component and has a self-locking function.

7. A control system for safe firing of a machine gun according to any one of claims 1-4, characterized in that, It further includes a display device. The control unit displays the total number of misfired cartridges and the total number of fired cartridges on the display device by sensing the photoelectric on-off signals of the photoelectric sensor.

8. A control system for safe firing of a machine gun according to any one of claims 1-4, characterized in that, It further includes a storage device. The control unit counts the total number of misfired cartridges and the total number of fired cartridges by sensing the photoelectric on-off signals of the photoelectric sensor and transmits them to the storage device for storage. The control unit can retrieve the data stored in the storage device in real time.

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