A target range shooting counting system
Patent Information
- Application Number
- CN202611309014.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-27
- Publication Date
- 2026-10-23
AI Technical Summary
[0004]本申请的目的是提供一种靶场射击计数系统，可实现全姿态、抗干扰的精准信号采集，既方便射手余光查看，又方便后方教官监控，可形成“弹药领取-实际消耗-数据核对”的管理闭环，解决了传统靶场计数系统中抗干扰难、姿势适应性差、设备兼容性弱、管理无闭环等问题
本申请提供了一种靶场射击计数系统，通过将红外传感器的DO输出端经J2端子接入比较器的反相输入端，并配合同相输入端的参考电压，利用比较器的电压比较特性，将传感器受温度、环境光或弹壳反射引起的模拟波动整定为陡峭的数字电平，同时，配合输出端的上拉电阻，有效提升了输出电平的驱动能力与噪声容限，使系统能够有效抑制相邻射击位声光干扰及环境杂波，确保每一发有效射击均能被稳定识别，避免了误触发和漏触发；“自锁开关+三极管电路”结构，构成了一个硬件级的电平双向适配器，通过手动切换自锁开关状态，系统无需更改主控程序或更换外围元件，即可兼容市面上高电平有效和低电平有效两种类型的红外传感器，这使得所述系统能够灵活搭配不同型号、不同检测逻辑的红外探头，适应立姿、跪姿等不同枪口位置带来的信号变化，极大降低了系统对特定传感器的依赖性和选型成本；采用纯模拟比较器与分立三极管搭建触发通路。传感器信号经比较器整形后直接通过三极管导通驱动压控开关，信号传输路径短且无软件轮询延时，能够在微秒级内完成触发响应。这保证了即使在高速连发射击场景下，系统也能精准捕捉每一发子弹的触发瞬间，不存在累积计数误差；“比较器+三极管+自锁开关+计数器”结构完全基于通用分立元器件搭建，无需依赖昂贵的高速摄像机、AD采集卡或高主频的复杂数字信号处理器，这种设计大幅降低了物料成本和硬件开发门槛，且电路简洁、故障点少，便于在靶场大规模部署和维护，具备极高的工程实用性和推广价值；在末端集成了计数与显示模块，实现了“感知即显示”，射手无需转移视线寻找靶纸或枪身计数器，通过隔板侧面的数码管即可实时确认已击发数量。同时，该显示数据可供后方教官远程目视监控，从而有效建立“弹药领取—实际消耗—数据核对”的闭环管理机制，杜绝了少打、多打或违规补射等弹药管理漏洞。
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Abstract
Description
Technical Field
[0001] This application relates to the field of sensing and data communication, and in particular to a firing range counting system. Background Technology
[0002] Currently, shooting range counting solutions include gun-mounted devices, acoustic solutions, and fixed-point sensors. Gun-mounted devices increase weight, shift the center of gravity, affect the shooter's feel, and are incompatible with older firearms without rails. Acoustic solutions are highly susceptible to interference from echoes and gunfire from adjacent firing positions (crosstalk) in indoor ranges; existing simple optical solutions are easily affected by ambient light, spent casings, or muzzle flash from adjacent firing positions. Fixed-point sensors cannot simultaneously cover muzzle positions for different heights, such as standing, kneeling, and prone positions.
[0003] To address these issues, existing high-end solutions often employ expensive high-speed cameras or complex digital signal processing (DSP) algorithms to identify postures, resulting in high costs and hindering widespread adoption. Furthermore, existing mechanical or simple electronic counters cannot be expanded to include advanced teaching functions such as shot timers. In traditional shooting ranges, instructors struggle to monitor each student's actual number of shots in real time. Students may fire too few or too many (wasting ammunition), or continue firing after the stop command, impacting training effectiveness. Summary of the Invention
[0004] The purpose of this application is to provide a shooting range counting system that can achieve accurate signal acquisition in all postures and with anti-interference capabilities. It is convenient for shooters to view with their peripheral vision and for instructors to monitor from the rear. It can form a closed-loop management system of "ammunition collection - actual consumption - data verification", which solves the problems of difficult anti-interference, poor posture adaptability, weak equipment compatibility and lack of closed-loop management in traditional shooting range counting systems.
[0005] To achieve the above objectives, this application provides the following solution.
[0006] This application provides a target range firing counting system, including: An infrared sensor, positioned at the firing position, is used to collect the firing trigger signal; The signal input and preprocessing module is connected to the output of the infrared sensor and includes a comparator for shaping the trigger signal collected by the infrared sensor into a stable level signal. A level adaptation and inversion module is connected to the output of the signal input and preprocessing module. It includes a self-locking switch and a transistor circuit. It is used to selectively invert or not invert the stable level signal according to the effective signal level type of the infrared sensor, and output an adapted drive signal. A counting and display module, connected to the output of the level adapter flip module, is used to count shots according to the drive signal and display the current counting result; The infrared sensor inputs a level signal to the inverting input of the comparator via the J2 terminal through the DO port. The non-inverting input of the comparator is connected to a reference voltage, and the output of the comparator is connected to a pull-up resistor.
[0007] Optionally, the comparator is an LM393 comparator, and the output of the LM393 comparator outputs the stable level signal through a pull-up resistor; the signal input and preprocessing module also includes a first capacitor and a reference voltage input terminal. When there is an input at the reference voltage input terminal, the level signal is filtered by the first capacitor and compared with the reference voltage input at the reference voltage input terminal.
[0008] Optionally, the signal input and preprocessing module further includes a second capacitor connected to the inverting input of the comparator for filtering and debouncing the level signal; the reference voltage is provided by a potentiometer connected to the non-inverting input of the comparator for adjusting the trigger sensitivity.
[0009] Optionally, in the level adaptation and toggling module: When the infrared sensor is active at a high level, the stable level signal is low, the self-locking switch is in the pop-up state, the stable level signal controls the first transistor to be cut off through the first terminal group of the self-locking switch, the collector of the first transistor outputs a high level signal, the high level signal is connected to the base of the second transistor through the second terminal group of the self-locking switch, so that the second transistor is turned on and outputs a low level signal to the negative input terminal of the voltage-controlled switch; When the infrared sensor is active low, the stable level signal is high, the self-locking switch is in the pressed state, and the stable level signal is directly connected to the base of the second transistor through the third terminal group of the self-locking switch, so that the second transistor is turned on and outputs a low level signal to the negative input terminal of the voltage-controlled switch.
[0010] Optionally, the firing range counting system further includes a voltage-controlled switch energization selection pin, which is used to select whether the voltage-controlled switch is energized.
[0011] Optionally, the firing range counting system further includes a trigger status indication circuit; the trigger status indication circuit is connected to the output terminal of the second transistor and includes a light-emitting diode and a current-limiting resistor connected in series, used for light indication when a valid trigger occurs.
[0012] Optionally, the counting and display module includes a three-digit counter. The three-digit counter receives the trigger pulse output by the level adaptation and toggle module through the J6 interface. Each time a valid signal is detected, the counter increments by 1, and the current number of shots is displayed in real time through a digital tube. The J6 interface is an HDR1X3 pin header.
[0013] Optionally, the firing range counting system also includes a reverse connection protection diode, which is connected to the power input terminal to prevent the circuit from burning out when the power is reversed.
[0014] Optionally, there are multiple infrared sensors arranged in an array on the firing position partition. Each infrared sensor adopts a deep-hole collimation structure to achieve full-attitude signal acquisition under different firing postures. The display module of the counting and display module is embedded in the side of the firing position partition for the shooter to view with their peripheral vision and for the instructor to monitor.
[0015] Optionally, the firing range counting system also includes an MCU control core, which is connected to the output of the level adapter switching module and is used to receive the drive signal and perform firing count. The MCU control core also has a reserved computing power expansion interface for firing rate monitoring and reaction time training.
[0016] According to the specific embodiments provided in this application, this application has the following technical effects: This application provides a firing range counting system. By connecting the DO output of an infrared sensor to the inverting input of a comparator via the J2 terminal, and using the reference voltage at the non-inverting input, the voltage comparison characteristics of the comparator are utilized to adjust the analog fluctuations caused by temperature, ambient light, or cartridge case reflections from the sensor to a steep digital level. Simultaneously, the pull-up resistor at the output effectively improves the driving capability and noise margin of the output level, enabling the system to effectively suppress acoustic and optical interference from adjacent firing positions and environmental noise, ensuring that each valid shot can be stably identified, avoiding false triggering and missed triggering. The "self-locking switch + transistor circuit" structure constitutes a hardware-level bidirectional level adapter. By manually switching the self-locking switch state, the system can be compatible with both high-level and low-level active infrared sensors on the market without changing the main control program or replacing peripheral components. This allows the system to flexibly match different models and detection logics of infrared probes, adapting to signal changes caused by different muzzle positions such as standing and kneeling postures, greatly reducing the system's dependence on specific sensors and the selection cost. A pure analog comparator and discrete transistors are used to build the triggering path. The sensor signal, after being shaped by a comparator, directly drives the voltage-controlled switch via a transistor. The short signal transmission path and lack of software polling delay enable trigger response within microseconds. This ensures that even in high-speed continuous firing scenarios, the system can accurately capture the trigger moment of each bullet, eliminating accumulated counting errors. The "comparator + transistor + self-locking switch + counter" structure is entirely built on general-purpose discrete components, eliminating the need for expensive high-speed cameras, AD acquisition cards, or complex high-frequency digital signal processors. This design significantly reduces material costs and hardware development barriers, and its simple circuitry with fewer potential failure points facilitates large-scale deployment and maintenance at firing ranges, demonstrating high engineering practicality and widespread application value. An integrated counting and display module at the end enables "sensing as display," allowing shooters to check the number of shots fired in real-time via a digital display on the side of the partition without needing to look for the target or the gun counter. Simultaneously, this displayed data allows instructors to remotely monitor the data, effectively establishing a closed-loop management mechanism of "ammunition collection—actual consumption—data verification," preventing ammunition management loopholes such as under-firing, over-firing, or unauthorized follow-up firing. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort: Figure 1 An architectural diagram of a firing range counting system provided in one embodiment of this application; Figure 2A circuit diagram of a target range shooting counting system provided in an embodiment of this application. Detailed Implementation
[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0020] In one exemplary embodiment, such as Figure 1 As shown, a shooting range counting system is provided, including an infrared sensor, a signal input and preprocessing module, a level adaptation and flipping module, and a counting and display module.
[0021] Infrared sensors, positioned at the firing position, are used to collect firing trigger signals. Multiple infrared sensors are arranged in an array on the firing position partition. Each infrared sensor employs a deep-hole collimation structure to achieve all-attitude signal acquisition under different firing postures. The deep-hole collimated infrared array serves as the sensing end, enabling accurate signal acquisition across all postures and with strong interference resistance. The deep-hole collimation structure refers to a certain number of holes of a certain depth (arranged in a matrix) on the firing position partition. Each infrared sensor is embedded within a specific hole. The sensor's sensing direction is fixed by the opening direction of the holes, ensuring that the sensing direction is perpendicularly aligned with the infrared light source area of the muzzle at this firing position, minimizing interference from other light sources. The purpose of arranging the sensors in an array is to increase the sensing range, fully covering the height and position of the muzzle under various firing postures. The infrared array can be arranged in a matrix or other manner, which is not limited here.
[0022] Infrared sensors are used for non-contact temperature measurement of the barrel metal during single-shot firearm training. The instantaneous peak temperature of the muzzle metal during a single shot is 320~450℃. The Excelitas TPiS 1S extended optical TO-packaged infrared thermopile sensor can be used, with an effective temperature measurement range of -20℃ to 500℃, fully covering the barrel temperature rise range. Other similar sensors can also be used; no specific limitation is made here. The sensor uses I2C digital communication and integrates a hardware INT open-drain interrupt pin. After configuring the temperature threshold / temperature rise rise edge triggering rules via the microcontroller's I2C, the INT pin can output high and low level switching signals. The back-end counting circuit (counting and display module) only needs to recognize the level transition to complete the shooting determination; 8~14 Long-wave infrared bands can avoid interference from muzzle flash, ambient hot air, and lights, and only stably collect the thermal radiation of solid metal in the barrel.
[0023] The signal input and preprocessing module, connected to the output of the infrared sensor, includes a comparator for shaping the trigger signal acquired by the infrared sensor into a stable level signal.
[0024] A level adaptation and inversion module, connected to the output of the signal input and preprocessing module, includes a self-locking switch and a transistor circuit. It is used to selectively invert or not invert the stable level signal according to the effective signal level type of the infrared sensor, and output an adapted drive signal.
[0025] The counting and display module, connected to the output of the level adapter flip module, is used to count shots and display the current counting result according to the drive signal. The "sensing" (infrared array) and "display" are integrated into the firing position partition. The display module of this counting and display module is embedded in the side of the firing position partition for the shooter to view with their peripheral vision and for the instructor to monitor.
[0026] This application acquires the trigger signal of the sensor, outputs a stable level signal through a comparator, and then reverses the different signals of the sensor through a self-locking switch and a transistor circuit to drive the voltage-controlled switch and trigger a three-bit counter.
[0027] In a specific example, the comparator is an LM393 comparator, and the output of the LM393 comparator (pin 1) outputs the stable level signal through a pull-up resistor R3; the signal input and preprocessing module also includes a first capacitor C1 (0.1... The reference voltage input terminal J4 is connected to the first capacitor C1 and the reference voltage input terminal J4. When there is an input to the reference voltage input terminal J4, the level signal is filtered by the first capacitor C1 and compared with the reference voltage input to the reference voltage input terminal J4.
[0028] Among them, such as Figure 2 As shown, the infrared sensor inputs a level signal via the DO port to the inverting input (pin 2) of the comparator through terminal J2. The non-inverting input (pin 3) of the comparator is connected to a reference voltage, and the output (pin 1) of the comparator is connected to a pull-up resistor R3. The VCC pin (pin 8) of the LM393 comparator... Figure 2 The U2A pin is also connected to the power input VCC, and the GND pin (pin 4) is grounded. The GND pin of the infrared sensor is grounded, the VCC pin is connected to a 5.0V power supply, and the AO pin is the analog output; however, the AO pin is not used in this embodiment. When there is no signal, the DO port outputs a low level; when a valid signal is detected, it outputs a high-level pulse. Pins 5, 6, and 7 of the LM393 comparator are not used in this embodiment.
[0029] Terminal J2 is an HDR1X2 header pin header, serving as a signal adapter. One pin connects to the DO port of the infrared sensor to bring out the DO port signal. Terminal J10 is an HDR1X2 header pin header, used as the power or signal interface for the infrared sensor, facilitating plugging and unplugging for debugging. One pin of terminal J10 is grounded to the other pin of terminal J2, and the other pin of terminal J10 is connected to the positive terminal of the first diode D1. One pin of terminal J3 (HDR1X2 header pin header) is connected to the other pin of terminal J3, which is connected to the negative input terminal of the voltage-controlled switch S1, and the first pin of terminal J6 (HDR1X3 header pin header).
[0030] The firing range counting system also includes a power reverse connection protection diode, which is a first diode D1 (1N4007G). This reverse connection protection diode is connected to the power input terminal to prevent the circuit from burning out when the power is reversed. The cathode of the first diode D1 is connected to the power input terminal VCC (5.0V).
[0031] The signal input and preprocessing module also includes a second capacitor C2, which is connected to the inverting input of the comparator and used to filter and debouncing the level signal. The reference voltage is provided by a potentiometer R4 (10kΩ) connected to the non-inverting input of the comparator. The potentiometer R4 is used to adjust the trigger sensitivity. One end of the potentiometer R4 is connected to a 5V power supply, and the other end is grounded. The tap output is connected to the non-inverting input of the LM393 comparator via terminal J1. Adjusting the tap position of the potentiometer R4 changes the reference voltage, thereby controlling the triggering conditions of the sensor signal and achieving sensitivity adjustment. One end of the second capacitor C2 and the other end of the potentiometer R4 are grounded, and the other end of the second capacitor C2 is connected to the inverting input of the LM393 comparator. The capacitance of the second capacitor C2 is 0.1F.
[0032] One pin of terminal J1 is connected to the tap of potentiometer R4, and the other pin is connected to the non-inverting input of the LM393 comparator. When terminal J1 is on, the filtered level signal is compared with the reference voltage set by R4 (10kΩ potentiometer). When there is input to the reference voltage input terminal J4, the filtered and debouncing level signal is filtered by the first capacitor C1 and compared with the reference voltage input to the reference voltage input terminal J4. A pull-up resistor R3 is used at the output of the LM393 comparator to pull up the signal and obtain a stable level signal. The reference voltage input terminal J4 is an HDR1X2 header; one pin connects to the other pin of terminal J1 and the non-inverting input of the LM393 comparator, and the other pin is grounded. One end of the first capacitor C1 is connected to the connection line between the reference voltage input terminal J4 and the non-inverting input of the LM393 comparator, and the other end of the first capacitor C1 is grounded.
[0033] The other end of the pull-up resistor R3 is also connected to one end of the third capacitor C3 (0.1F), and the other end of the third capacitor C3 is grounded. The cathode of the first diode D1 and the power input terminal VCC are also connected to one end of the first resistor R1 (4kΩ), and the other end of the first resistor R1 is connected to the anode of the first light-emitting diode LED1, and the cathode of the first light-emitting diode LED1 is grounded. When the power input terminal VCC is normally connected and the first diode D1 is in the conducting state, current will flow through the first light-emitting diode LED1, making the first light-emitting diode LED1 constantly lit. When the circuit is powered on, it lights up, indicating that the power supply is working normally.
[0034] The output of the comparator is connected to one end of the second resistor R2 (1kΩ), and the other end of the second resistor R2 is connected to terminal 1 of the self-locking switch. Terminal 1 of the self-locking switch is also connected to terminal 3, forming the first terminal group. Terminal 2 of the self-locking switch is connected to terminal 6, terminal 3 of the self-locking switch is connected to the base of the first transistor Q1, and terminal 4 of the self-locking switch is connected to terminal 6 and the collector of the first transistor Q1, respectively. The emitter of the first transistor Q1 is grounded to the emitter of the second transistor Q2. The base of the second transistor Q2 is connected to terminal 6 of the self-locking switch, and the collector of the second transistor Q2 is connected to the negative input terminal of the voltage-controlled switch S1.
[0035] The system determines whether the first transistor Q1 should be inverted based on whether the valid signal from the preceding sensor is high or low. If it is inverted, terminals 4 and 6 of the self-locking switch are needed to control the operation of the second transistor Q2. If it is not inverted, terminals 2 and 6 of the self-locking switch are needed to turn on the second transistor Q2 to further coordinate with the subsequent drive switch S1.
[0036] In the level adaptation and flipping module: when the infrared sensor is active high, the stable level signal is low, and the self-locking switch is in the pop-up state (manually adjusted to the pop-up state). The stable level signal controls the first transistor Q1 to turn off through the first terminal group (terminals 1 and 3) of the self-locking switch. The collector of the first transistor Q1 obtains a stable high-level signal through the sixth resistor R6 (10kΩ), and outputs a high-level signal. This high-level signal is connected to the base of the second transistor Q2 through the second terminal group (terminals 4 and 6) of the self-locking switch. The second transistor Q2 receives the high-level signal from terminals 4 and 6 of the self-locking switch (which has already passed through the first transistor). Q1 is inverted, causing the second transistor Q2 to conduct and output a stable low-level signal to the negative input terminal of the voltage-controlled switch S1, driving the voltage-controlled switch S1. Furthermore, during effective triggering, the second light-emitting diode LED2 and the fifth resistor R5 (2kΩ) are used for triggering and display. The other end of the sixth resistor R6 is connected to one end of the fifth resistor R5 and the power input terminal VCC. The other end of the fifth resistor R5 is connected to the positive terminal of the second light-emitting diode LED2. The negative terminal of the second light-emitting diode LED2 is connected to the negative terminal of the second diode D2 (1N4007G) and the negative input terminal of the voltage-controlled switch S1. The positive terminal of the second diode D2 is connected to one end of the fifth resistor R5 and the power input terminal VCC. The fifth resistor R5 is a current-limiting auxiliary resistor for the second light-emitting diode LED2, used to stabilize the current of LED2. The self-locking switch switching design is suitable for both high-level and low-level active sensors.
[0037] The firing range counting system also includes a trigger status indicator circuit; the trigger status indicator circuit is connected to the output terminal of the second transistor Q2, and includes a light-emitting diode (i.e., the second light-emitting diode LED2) and a current-limiting resistor (i.e., the fifth resistor R5) connected in series, which is used to provide light indication when a valid trigger is triggered.
[0038] When the infrared sensor is active low, the stable level signal is high, and the self-locking switch is in the pressed state (manually adjust the self-locking switch to the pressed state). The stable level signal (without being inverted by the first transistor Q1) is directly connected to the base of the second transistor Q2 through the third terminal group (terminals 2 and 6) of the self-locking switch, causing the second transistor Q2 to conduct and output a low level signal to the negative input terminal of the voltage-controlled switch S1, driving the voltage-controlled switch. During the effective triggering process, the second light-emitting diode LED2 and the fifth resistor R5 are used for triggering and display.
[0039] The positive input terminal of the pressure-controlled switch S1 is connected to the power input terminal VCC. When the supply voltage reaches the voltage of the power input terminal VCC, the pressure-controlled switch S1 is triggered to switch. A pressure-controlled switch action indicator is provided for easy observation of the triggering status. The firing range counting system also includes a pressure-controlled switch energization selection pin, which is used to select whether the pressure-controlled switch is energized.
[0040] The counting and display module includes a three-digit counter. The three-digit counter receives the trigger pulse output by the level adapter flip module through the J6 interface. Each time a valid signal is detected, the counter increments by 1, and the current number of shots is displayed in real time through a digital tube. The J6 interface is an HDR1X3 pin header.
[0041] The three-digit counter, based on the action of the voltage-controlled switch S1, shorts the KEY1 and KEY2 pins of the counter via the J6 terminal interface, thus enabling counting. The J6 terminal serves as a signal interface, sending the trigger pulse output from the second transistor Q2 to either the KEY1 or KEY2 pin of the three-digit counter. The VCC pin of the three-digit counter is connected to a 5V power supply, and the GND pin is grounded.
[0042] The three-digit counter receives valid trigger pulses from the pre-amplifier circuit (voltage-controlled switch S1). Each time a valid signal is detected, KEY1 and KEY2 are shorted once, the counter increments by 1, and the current number of signal triggers is displayed in real time through a digital tube.
[0043] The firing range counting system also includes an MCU control core, which is connected to the output of the level adapter switching module. The MCU control core receives the drive signal and performs firing counts. It also reserves a computing power expansion interface for firing rate monitoring and reaction time training. As the processing unit, the MCU control core not only performs counting but also reserves the computing power foundation for future firing rate monitoring and reaction time training.
[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0045] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A firing range counting system, characterized in that, The firing range counting system includes: An infrared sensor, positioned at the firing position, is used to collect the firing trigger signal; The signal input and preprocessing module is connected to the output of the infrared sensor and includes a comparator for shaping the trigger signal collected by the infrared sensor into a stable level signal. A level adaptation and inversion module is connected to the output of the signal input and preprocessing module. It includes a self-locking switch and a transistor circuit. It is used to selectively invert or not invert the stable level signal according to the effective signal level type of the infrared sensor, and output an adapted drive signal. A counting and display module, connected to the output of the level adapter flip module, is used to count shots according to the drive signal and display the current counting result; The infrared sensor inputs a level signal to the inverting input of the comparator via the J2 terminal through the DO port. The non-inverting input of the comparator is connected to a reference voltage, and the output of the comparator is connected to a pull-up resistor.
2. The firing range counting system according to claim 1, characterized in that, The comparator is an LM393 comparator, and the output of the LM393 comparator outputs a stable level signal through a pull-up resistor. The signal input and preprocessing module also includes a first capacitor and a reference voltage input terminal. When there is an input at the reference voltage input terminal, the level signal is filtered by the first capacitor and compared with the reference voltage input at the reference voltage input terminal.
3. The firing range counting system according to claim 1, characterized in that, The signal input and preprocessing module further includes a second capacitor, which is connected to the inverting input of the comparator and is used to filter and de-jitter the level signal. The reference voltage is provided by a potentiometer connected to the non-inverting input of the comparator, and the potentiometer is used to adjust the trigger sensitivity.
4. The firing range counting system according to claim 1, characterized in that, In the level adaptation and flipping module: When the infrared sensor is active at a high level, the stable level signal is low, the self-locking switch is in the pop-up state, the stable level signal controls the first transistor to be cut off through the first terminal group of the self-locking switch, the collector of the first transistor outputs a high level signal, the high level signal is connected to the base of the second transistor through the second terminal group of the self-locking switch, so that the second transistor is turned on and outputs a low level signal to the negative input terminal of the voltage-controlled switch; When the infrared sensor is active low, the stable level signal is high, the self-locking switch is in the pressed state, and the stable level signal is directly connected to the base of the second transistor through the third terminal group of the self-locking switch, so that the second transistor is turned on and outputs a low level signal to the negative input terminal of the voltage-controlled switch.
5. The firing range counting system according to claim 4, characterized in that, The firing range counting system also includes a voltage-controlled switch energization selection pin, which is used to select whether the voltage-controlled switch is energized.
6. The firing range counting system according to claim 4, characterized in that, The firing range counting system also includes a trigger status indicator circuit; the trigger status indicator circuit is connected to the output terminal of the second transistor and includes a light-emitting diode and a current-limiting resistor connected in series, used to provide light indication when a valid trigger occurs.
7. The firing range counting system according to claim 1, characterized in that, The counting and display module includes a three-digit counter. The three-digit counter receives the trigger pulse output by the level adapter flip module through the J6 interface. Each time a valid signal is detected, the counter increments by 1, and the current number of shots is displayed in real time through a digital tube. The J6 interface is an HDR1X3 pin header.
8. The firing range counting system according to claim 1, characterized in that, The firing range counting system also includes a reverse connection protection diode, which is connected to the power input terminal to prevent the circuit from burning out when the power is reversed.
9. The firing range counting system according to claim 1, characterized in that, The infrared sensors are multiple and arranged in an array on the firing position partition. Each infrared sensor adopts a deep hole collimation structure to achieve full-attitude signal acquisition under different firing postures. The display module of the counting and display module is embedded in the side of the firing position partition for the shooter to view with their peripheral vision and for the instructor to monitor.
10. The firing range counting system according to claim 1, characterized in that, The firing range counting system also includes an MCU control core, which is connected to the output of the level adapter switching module. It is used to receive the drive signal and perform firing count. The MCU control core also has a reserved computing power expansion interface for firing rate monitoring and reaction time training.