A sniping alarm system response time measuring device and measuring method

Abstract

This invention discloses a response time measurement device for a sniper alarm system, comprising: a target generation device, a high-speed photoelectric probe, a sniper alarm system, and a high-precision time measurement device. The target generation device generates a target optical signal; the high-speed photoelectric probe converts the target optical signal into a target electrical signal; the sniper alarm system detects and identifies the target optical signal and converts it into an alarm electrical signal; the high-precision time measurement device measures and records the occurrence times of the target electrical signal and the alarm electrical signal; the response time of the sniper alarm system is obtained by the time difference between the occurrence times of the target electrical signal and the alarm electrical signal. This invention enables accurate measurement of the response time of a long-range target sniper alarm system; it utilizes the existing alarm electrical signal output port of the sniper alarm system, allowing for response time measurement without affecting its normal operation.

Description

Technical Field

[0001] This invention belongs to the field of photoelectric alarm technology, and relates to a device and method for measuring the response time of a sniper alarm system. Background Technology

[0002] Response time is a crucial metric for sniper alarm systems, largely determining their performance.

[0003] When a target appears, the sniper alarm system quickly detects and identifies the target's light signal, and then issues an alarm electrical signal.

[0004] The time difference between the moment the target appears and the moment the sniper alarm system issues an alarm is the system's response time.

[0005] When the target under test is close to the sniper alarm system, the system response time can be measured using devices such as oscilloscopes and high-speed detectors (by connecting the photoelectric signal generated by the target under test and the alarm electrical signal generated by the sniper alarm system to two input channels of the same oscilloscope and measuring the time difference between the two channel signals).

[0006] However, when the target is far from the sniper system, it becomes more difficult to accurately measure the response time of the sniper alarm system.

[0007] Therefore, there is an urgent need to provide a device and method for measuring the response time of a widely applicable sniper alarm system. Summary of the Invention

[0008] (I) Purpose of the Invention

[0009] The purpose of this invention is to provide a device and method for measuring the response time of a sniper alarm system, which can achieve high-precision measurement of the response time of a sniper alarm system for long-range targets.

[0010] (II) Technical Solution

[0011] To address the aforementioned technical problems, this invention provides a sniper alarm system response time measurement device, comprising a target generation device, a high-speed photoelectric probe, a sniper alarm system, and a high-precision time measurement device.

[0012] The target generation device is used to generate a target optical signal; the high-speed photoelectric probe is used to convert the target optical signal into a target electrical signal; the sniper alarm system is used to detect and identify the target optical signal and convert the target optical signal into an alarm electrical signal; the high-precision time measurement device is used to measure and record the occurrence time of the target electrical signal and the alarm electrical signal.

[0013] This invention uses multiple high-precision time measurement devices to measure and record the occurrence times of the target electrical signal and the alarm electrical signal. The response time of the sniper alarm system is obtained by calculating the time difference between the occurrence of the target electrical signal and the alarm electrical signal.

[0014] Furthermore, the target generation device can be a live-fire or blank-fire device, a pulsed light source, or a target simulation device based on a DMD (Digital Micromirror Array).

[0015] Furthermore, the photoelectric conversion time of the high-speed photoelectric probe is on the order of nanoseconds, and this time delay has a negligible impact on the measurement accuracy of the sniper alarm system's response time. The high-speed photoelectric probe has a line-of-sight with the target.

[0016] Furthermore, the sniper alarm system includes a photoelectric detection subsystem and a wearable alarm subsystem. The photoelectric detection subsystem is used to detect and identify target light signals and transmit alarm information to the wearable alarm subsystem wirelessly. There can be one or more wearable alarm subsystems. After receiving the alarm information, the wearable alarm subsystem issues an alarm electrical signal.

[0017] Furthermore, the distance between the photoelectric detection subsystem and the wearable alarm subsystem is within the wireless communication range. The distance between the multiple wearable alarm subsystems is not limited. The photoelectric detection subsystem has line-of-sight with the target, and the distance does not exceed the effective range of the sniper alarm system.

[0018] Furthermore, the high-precision time measurement device includes a crystal oscillator clock module, a BeiDou / GPS clock module, a satellite signal receiving antenna, a comprehensive signal processing module, an internal storage module, a display module, an electrical signal input module, a data output module, and a power supply module.

[0019] Furthermore, the crystal oscillator clock module and the BeiDou / GPS clock module jointly provide clock information to the device, and both clock information enters the integrated signal processing module. The crystal oscillator clock module has good short-term stability, but accumulates errors over long-term operation. The pulse-per-second (PPS) signal emitted by the BeiDou / GPS satellites has good long-term stability, but low time resolution. Therefore, the BeiDou / GPS clock module is used to obtain clock information longer than a second, while the crystal oscillator clock module is used to obtain clock information shorter than a second.

[0020] Furthermore, the electrical signal input module is used to receive external electrical signals to be tested (target electrical signals and alarm electrical signals), and preprocess them. After preprocessing, the electrical signals enter the integrated signal processing module. The preprocessing process includes voltage division and current division to ensure that the electrical signals input to the integrated signal processing module meet the requirements.

[0021] Furthermore, the integrated signal processing module processes and analyzes the preprocessed electrical signal to determine whether an electrical signal meeting specific conditions is generated (such as a rising edge signal). If so, the moment is recorded in the internal storage module.

[0022] The time information recorded in the internal storage module can be displayed through the display module or transmitted to an external device (such as a computer) through the data output module.

[0023] The power module is used to supply power to the high-precision time measurement device.

[0024] This invention also provides a method for measuring the response time of a sniper alarm system, the specific steps of which are as follows:

[0025] S1: Set up the target generation device and the high-speed photoelectric probe, position the target light signal at the center of the field of view of the high-speed photoelectric probe, and connect the output end of the high-speed photoelectric probe to a high-precision time measurement device;

[0026] S2: Set up the sniper alarm system and arrange the positions of its photoelectric detection subsystem and wearable alarm subsystem; connect the discharge terminal of each wearable alarm subsystem to one of the high-precision time measurement devices;

[0027] S3: The target generating device generates a target optical signal, and all high-precision time measuring devices measure and record the moment when the electrical signal appears;

[0028] S4: The response time of the sniper alarm system is obtained based on the time difference between the occurrence of the measured target signal and the measured alarm signal.

[0029] Furthermore, by changing the distance between the target generating device and the photoelectric detection subsystem, the response time of the sniper alarm system at different operating distances is measured.

[0030] Furthermore, by changing the distance between the wearable alarm subsystem and the photoelectric detection subsystem, the response time of the sniper alarm system under different wireless communication distances is measured.

[0031] Furthermore, by rotating the photoelectric detection subsystem, the target light signal appears at different positions in the field of view of the photoelectric detection subsystem, and the response time of the sniper alarm system is measured in each field of view.

[0032] Furthermore, by changing target characteristics (such as bullet type), the response time of the sniper warning system to different targets was measured.

[0033] (III) Beneficial Effects

[0034] The sniper alarm system response time measurement device and method provided by the above technical solution can accurately measure the response time of the sniper alarm system for long-range targets; it can measure the response time without affecting its normal use by utilizing the existing alarm electrical signal output port of the sniper alarm system; the measurement is convenient and has high accuracy. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a sniper alarm system response time measurement device.

[0036] Figure 2 This is a diagram showing the components of a high-precision time measurement device. Detailed Implementation

[0037] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0038] like Figure 1 As shown, the sniper alarm system response time measurement device in this embodiment includes a target generation device, a high-speed photoelectric probe, a sniper alarm system, and a high-precision time measurement device.

[0039] The target generation device is a sniper rifle live-fire shooting device that generates a flash target light signal through single-shot firing.

[0040] The high-speed photoelectric probe is mounted near the muzzle of the sniper rifle and aimed at it, ensuring the muzzle flash is centered in its field of view. Its function is to convert the muzzle flash light signal into an electrical signal. As the muzzle flash appears, a rising edge appears on the corresponding electrical signal. The photoelectric conversion time delay of the high-speed photoelectric probe is on the order of nanoseconds, far less than the response time (milliseconds) of conventional sniper alarm systems, and can be ignored.

[0041] Connect the output of the photoelectric probe to a high-precision time measurement device (code A) to measure and record the appearance time of the gun flame target.

[0042] The sniper alarm system consists of an optoelectronic detection subsystem and a wearable alarm subsystem.

[0043] The photoelectric detection subsystem first captures the flash signal and converts it into a digital video signal. Then, it performs image processing on the digital video signal. When it determines that a target with the characteristics (spatial domain, time domain, band, etc.) has appeared, it sends an alarm signal to multiple wearable alarm subsystems (code 1 to N) wirelessly.

[0044] Connect a high-precision time measurement device (code B1-B) to the alarm electrical signal output terminal of each wearable alarm subsystem. N). Measure and record the output time of the alarm electrical signals of each wearable alarm subsystem.

[0045] The difference between the time the target appears and the time the alarm signal is output is the response time of the sniper alarm system.

[0046] like Figure 2 As shown, the high-precision time measurement device includes a crystal oscillator clock module, a Beidou / GPS clock module, a satellite signal receiving antenna, a comprehensive signal processing module, an internal storage module, a display module, an electrical signal input module, a data output module, and a power supply module.

[0047] The clock information from both the BeiDou / GPS clock module and the crystal oscillator clock module is fed into the integrated signal processing module. Clock information longer than a second obtained using the BeiDou / GPS clock module is denoted as: Year A / Month B / Day C / Hour D / Minute E / Second F. Clock information shorter than a second obtained using the crystal oscillator clock module is denoted as: Millisecond X / Microsecond Y / Nanosecond Z. The integrated signal processing module resets X, Y, and Z to zero and restarts the timing process each time it receives a second pulse signal. The electrical signal input module receives external electrical signals to be measured and preprocesses them. The maximum voltage of the input electrical signal is controlled at 4-5V, and the maximum current is controlled within 2A. The preprocessed electrical signal then enters the integrated signal processing module. The integrated signal processing module processes and analyzes the preprocessed electrical signal to determine if a rising edge event has occurred that meets the following conditions. The rising edge event condition parameters are set as follows: ① Rising slope ≥ 1V / μs, ② Maximum rising voltage ≥ 4V. If a rising edge event that meets the above requirements occurs, the time of the rising edge occurrence is recorded in the internal storage module. The time information recorded in the internal storage module can be displayed via the display module or transmitted to an external device (such as a computer) via the data output module. The power module uses a rechargeable battery to power the device, enabling its portability.

[0048] This embodiment also provides a method for measuring the response time of a sniper alarm system, the specific steps of which are as follows:

[0049] S1: Set up the target generation device and the high-speed photoelectric probe, position the target light signal at the center of the field of view of the high-speed photoelectric probe, and connect the output end of the high-speed photoelectric probe to a high-precision time measurement device;

[0050] S2: Set up the sniper alarm system and arrange the positions of its photoelectric detection subsystem and wearable alarm subsystem; connect the discharge terminal of each wearable alarm subsystem to one of the high-precision time measurement devices;

[0051] S3: The target generating device generates a target optical signal, and all high-precision time measuring devices measure and record the moment when the electrical signal appears;

[0052] S4: The response time of the sniper alarm system is obtained based on the time difference between the occurrence of the measured target signal and the measured alarm signal.

[0053] Furthermore, by changing the distance between the target generating device and the photoelectric detection subsystem, the response time of the sniper alarm system at different operating distances is measured.

[0054] Furthermore, by changing the distance between the wearable alarm subsystem and the photoelectric detection subsystem, the response time of the sniper alarm system under different wireless communication distances is measured.

[0055] Furthermore, by rotating the photoelectric detection subsystem, the target light signal appears at different positions in the field of view of the photoelectric detection subsystem, and the response time of the sniper alarm system is measured in each field of view.

[0056] Furthermore, by changing target characteristics (such as bullet type), the response time of the sniper warning system to different targets was measured.

[0057] As can be seen from the above technical solution, the present invention can accurately measure the response time of the alarm system while the alarm system is working normally, without affecting the normal operation of the alarm system, and can conveniently measure the response time of multiple alarm channels simultaneously.

[0058] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for measuring the response time of a sniper alarm system, characterized in that, The measurement method is based on a sniper alarm system response time measurement device, which includes: a target generation device, a high-speed photoelectric probe, a sniper alarm system, and a high-precision time measurement device. The target generation device generates a target optical signal; the high-speed photoelectric probe converts the target optical signal into a target electrical signal; the sniper alarm system detects and identifies the target optical signal and converts it into an alarm electrical signal; the high-precision time measurement device measures and records the occurrence times of the target electrical signal and the alarm electrical signal; the response time of the sniper alarm system is obtained by the time difference between the occurrence times of the target electrical signal and the alarm electrical signal. The target generation device is either live-fire or blank-fire, or a pulsed light source, or a target simulation device based on DMD; the photoelectric conversion time of the high-speed photoelectric probe is on the nanosecond level, and this photoelectric conversion time has negligible impact on the response time measurement accuracy of the sniper alarm system; the high-speed photoelectric probe has a line of sight with the target; the sniper alarm system includes a photoelectric detection subsystem and a wearable alarm subsystem. The photoelectric detection subsystem is used to detect and identify the target light signal and transmit the alarm information to the wearable alarm subsystem wirelessly. There are one or more wearable alarm subsystems. After receiving the alarm information, the wearable alarm subsystem emits an alarm electrical signal; the photoelectric detection... The distance between the subsystem and the wearable alarm subsystem is within the wireless communication range; when there are multiple wearable alarm subsystems, the distance between them is unlimited; the photoelectric detection subsystem has line-of-sight with the target, and the distance does not exceed the effective range of the sniper alarm system; the high-precision time measurement device includes a crystal oscillator clock module, a Beidou / GPS clock module, a satellite signal receiving antenna, a comprehensive signal processing module, an internal storage module, a display module, an electrical signal input module, a data output module, and a power supply module; the crystal oscillator clock module and the Beidou / GPS clock module jointly provide clock information to the device, and the clock information is all fed into the comprehensive signal processing module; the Beidou / GPS clock module obtains... For clock information exceeding seconds, the crystal oscillator clock module obtains clock information within seconds; the electrical signal input module receives external test signals including target electrical signals and alarm electrical signals, and performs voltage division and current splitting preprocessing on them. The preprocessed electrical signals then enter the integrated signal processing module; the integrated signal processing module processes and analyzes the preprocessed electrical signals to determine if any electrical signals meeting set conditions are generated. If so, the time is recorded in the internal storage module; the time information recorded in the internal storage module is displayed through the display module or transmitted to an external device through the data output module; the power supply module supplies power to the high-precision time measurement device. The measurement method includes the following steps: S1: Set up the target generation device and the high-speed photoelectric probe, position the target light signal at the center of the field of view of the high-speed photoelectric probe, and connect the output end of the high-speed photoelectric probe to a high-precision time measurement device; S2: Set up the sniper alarm system and arrange the positions of its photoelectric detection subsystem and wearable alarm subsystem; connect the discharge terminal of each wearable alarm subsystem to one of the high-precision time measurement devices; S3: The target generating device generates a target optical signal, and all high-precision time measuring devices measure and record the moment when the electrical signal appears; S4: The response time of the sniper alarm system is obtained based on the time difference between the occurrence of the measured target signal and the measured alarm signal; The response time of the sniper alarm system at different operating distances was measured by changing the distance between the target generating device and the photoelectric detection subsystem; the response time of the sniper alarm system at different wireless communication distances was measured by changing the distance between the wearable alarm subsystem and the photoelectric detection subsystem. By rotating the photoelectric detection subsystem, the target light signal appears at different positions in the field of view of the photoelectric detection subsystem, and the response time of the sniper alarm system is measured in each field of view. By changing the target characteristics, the response time of the sniper alarm system to different targets was measured.

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