JP2005134074A - Landing detector for fire training device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a landing detector capable of responding to both sonic and subsonic bullets with a single device, and performing precise landing position detection and landing site detection without causing a malfunction by disturbance. <P>SOLUTION: The landing detector comprises a distortion detector or an acceleration detector attached to a target itself to detect a landing impact, in which a detection signal of the detector is subjected to signal processing for eliminating disturbance from the signal to pass only a landing impact signal, whereby the presence/absence of landing to the target and/or the landing position thereon are detected. This detector further comprises a filter for passing only the landing impact signal. The time difference between landing impact signals from a plurality of detectors is detected, and the time difference detection signal and attachment position information of each detector are operated, whereby the landing position to the target is detected. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shooting training apparatus, and more particularly, to a landing detection apparatus that detects the presence / absence of landing on a target, a landing site, and a landing position.

  The conventional shooting training was mainly for basic shooting of fixed concealment devices that perform only concealment of targets. However, in recent years, with the increase in violent crimes using guns and changes in the international situation, As part of the countermeasures, there is a demand for shooting at moving targets, which is a more practical training. Therefore, it is desired that the moving target is equipped with a landing position detection device, and that any movement of the target is performed by combining the landing and the landing position, and the efficiency of the training is improved.

  In addition, various devices have been proposed as conventional landing position detection devices. For example, a device that detects a shock wave generated by a bullet having a speed of sound or higher and estimates a landing position (see, for example, Patent Document 1), An apparatus for estimating the landing position by detecting sound when passing through a space in which a bullet is closed (see, for example, Patent Document 2), and an apparatus for estimating the landing position from reflected laser light (for example, Patent Document 3) And a device that estimates the landing position from a change in the amount of light of the light receiving unit by shutting off the laser when the bullet passes through the laser screen, and a device that performs image processing on the image captured by the camera and estimates the landing position.

In addition, as a method of detecting a landing position by an impact sensor or a vibration sensor attached to a target, flying object collision position detection (for example, see Patent Document 4), shock wave source detection (for example, see Patent Document 5) This method has been proposed.
Japanese Patent Publication No.62-17193 Japanese Patent No. 3242276 JP-A-11-230699 Japanese Patent Laid-Open No. 1-3500 JP-A-4-29000

  In the prior art device for detecting a shock wave and estimating the landing position, it cannot be used for a handgun that has a slow bullet velocity and does not generate a shock wave, and the detection accuracy is greatly affected by the wind speed at the installation location. Also, in the device that detects the sound when passing through the space where the bullet is closed and estimates the landing position, the bullet passes through the closed space, so the bullet constitutes the passage part or the closed space Is low in durability and requires a closed space, which increases the size of the apparatus. Similarly, a device using a laser or a camera image is also large and difficult to mount on a moving target device. As described above, the conventional landing position detection device can be mounted on a large moving target device that can handle both sonic (rifles, etc.) and subsonic (handguns, mechanical pistols, etc.) bullets with a single device. It was difficult.

  In addition, in each of the methods of detecting the landing position using a plurality of impact sensors and vibration sensors, the difference in the vibration occurrence time is detected by comparing the voltage of the output signal of each sensor. The generated impact signal has a high frequency and a low voltage level. However, the vibration caused by the distortion or deflection of the target due to impact of impact with time changes is a signal with a low frequency and a high voltage level, but the exclusion of this high voltage level signal is not considered, so there is a difference in detection time. There has been a problem that the landing position cannot be calculated accurately due to erroneous detection. In addition, it has not been studied to eliminate the vibration of the target that occurs when the target turns and moves, or the vibration that occurs when a pebble or the like hits the target. there were.

  An object of the present invention is to detect both sonic and subsonic bullets with a single device and detect the presence / absence of impact, the impacted part (parts such as the head and chest in the case of a human target), and the impact position It is an object of the present invention to provide a landing detection device that can be downsized and that does not malfunction due to disturbance.

In order to solve the above problems, the present invention mainly adopts the following configuration.
In the impact detection device in the shooting training device, a distortion detector or an acceleration detector is attached to the target itself to detect impact at the time of impact, eliminate disturbance from the detection signal of the detector, and pass only the impact signal at impact. The signal processing is performed to detect the presence or absence and / or the landing position of the target.

  Further, the landing detection device is provided with a filter that allows only an impact signal at the time of landing to pass.

  Further, in the landing detection device, a plurality of strain detectors or acceleration detectors are mounted, the time difference of impact signals at the time of landing from each detector is detected, and the mounting position information of the time difference detection signal and each detector is calculated. Thus, the landing position on the target is detected.

  Further, in the landing detection apparatus in the shooting training apparatus, the target is formed for each target part, for example, the head and the chest, the target part is joined by a buffer part, and the strain detector or the acceleration detector is provided for each target part. To detect the impact at the time of landing, remove the disturbance from the detection signal from the detector and perform signal processing to pass only the impact signal at the time of landing, and whether or not the target has landed and / or the target of the landing It is set as the structure which detects a site | part.

  According to the present invention, there is provided a landing detection device that can cope with both sonic and subsonic bullets with a single device, can perform accurate landing position detection and site detection, and can be downsized without malfunction due to disturbance. be able to.

  A landing position measuring apparatus according to an embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a diagram showing a configuration example in which a strain detector is attached to a target in an impact detection apparatus according to an embodiment of the present invention, and FIG. 2 shows an acceleration detector as a target in the impact detection apparatus according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a configuration example in which an acceleration detector is attached to a target gripping portion in the landing detection device according to the embodiment of the present invention, and FIG. 4 is a diagram illustrating an embodiment of the present invention. It is a figure which shows the structural example which divided the target in every impact detection apparatus which concerns on this, and joined these parts with the buffer material, and attached the distortion | strain detector for every site | part.

  FIG. 5 is a diagram illustrating an internal configuration of a signal processing circuit in the landing detection device according to the present embodiment, and FIG. 6 is a diagram illustrating a configuration example of landing position detection in the landing detection device according to the present embodiment. FIG. 7 is a diagram for explaining landing false detection due to secondary vibration derived from impact vibration at the time of landing. FIG. 8 is a diagram showing comparison between impact vibration at the time of landing and a disturbance signal. FIG. It is a figure which shows the waveform of the signal processing in the landing detection apparatus which concerns on a form.

  In FIG. 1, a humanoid target 1 and a square target 2 are shown, and a strain detector 3 is attached to the target, and impact vibrations of landing are detected by the strain detector. In FIG. 2, a humanoid target 1 and a square target 2 are shown, and an acceleration detector 4 is attached to the target, and impact vibrations of landing are detected by the acceleration detector.

  FIG. 3 shows a configuration example in which the acceleration detector 4 is attached to the target gripping part 5 of the humanoid target 1. In FIG. 4, the target is configured for each part such as the head 6, the chest part 7, etc., and the joint part is joined by a buffer part 8 made of a different material, and a strain detector is provided for each target part. The example of a structure which attached 3 is shown.

  As shown in FIG. 7, in the comparator of the landing detection device in the prior art, not the original signal (high frequency and low voltage level) detected at the time of landing but secondary generated vibration (low frequency and high voltage level). ) Was detected, it was impossible to accurately estimate the landing position, resulting in false detection. In addition, as shown in FIG. 8, when the hammer hits or pebbles, or when the target swings or moves, the impact vibration is much lower in frequency than the impact signal at impact. The level is also great.

  In the embodiment of the present invention, as described below, by adopting the circuit configuration shown in FIG. 5 and FIG. 6, disturbances other than impact vibration at the time of landing are eliminated, and as shown in FIG. It detects only the shock vibration.

  The electric signal output from the strain detector or acceleration detector attached to the target is subjected to signal processing by the signal processing circuit 9 shown in FIG. The signal processing circuit 9 is an amplification circuit 10 that amplifies the electrical signal of the detector composed of the strain detector 3 or the acceleration detector 4, and a frequency band corresponding to the velocity of the target bullet as shown in FIG. A filter 11 that passes only the signal, a comparator 12 that compares the magnitude of the signal and outputs a detection signal, and a monostable multivibrator 18. In the illustrated example of FIG. 5, the detectors 3 and 4 are part of the signal processing circuit 9, but may be separate. The characteristics of the filter 11 are determined by factors such as the target material and the bullet velocity.

  After passing through the filter 11, the signal is compared with the reference voltage 13 by the comparator 12, and when it is higher than the reference voltage 13, it is output as a detection signal of each detector. With the filter 11 and the comparator 12, it is possible to distinguish a signal at the time of landing from disturbances such as a vibration that occurs when a pebble hits or a target is concealed or a vibration during movement.

  When only the presence / absence of landing on the target is required, or only information on the landing site (information that the head or chest has landed) is required, the result detected only by the signal processing circuit described above may be used.

  Further, when information on the landing position (information on which position has landed) is necessary, the detection signal output from each signal processing circuit 9 is used to detect each detection signal by the time difference detection circuit 14 shown in FIG. The landing position is calculated by the landing position calculation unit 17 from the time difference information, the temperature information output from the temperature detection circuit 15 that detects the temperature of the target material or the ambient temperature, and the mounting position information 16 of each detector. . That is, as shown in FIGS. 1 and 2, since a plurality of detectors 3 and 4 are installed on the target, a time difference is generated at the detection time point in the vibration detection from the landing position. In that case, the mounting position information of a plurality of detectors is naturally referred to. In such a landing position detection device, it is possible to detect the presence or absence of landing.

  Here, depending on the target material, the impact vibration, which is a high frequency, is greatly attenuated and becomes a minute signal. Therefore, the amplifier and the filter need to be optimally designed to match the target material. Further, since the impact vibration depends on the bullet velocity, it is necessary to use a filter having a band corresponding to a plurality of guns.

  As described above, in the embodiment of the present invention, a plurality of strain detectors or a plurality of acceleration detectors attached to the target itself or the target gripping part detects impact vibrations generated in the target upon landing, By passing only the frequency band corresponding to the velocity of the target bullet, applying signal processing to eliminate disturbance signals such as turning of the target, and detecting impact vibration with a comparator, the difference in arrival time of impact vibration to multiple sensors Thus, it is possible to obtain an impact position detection device that can estimate an accurate impact position and is resistant to disturbance caused by a target turning or a collision other than a bullet.

  Furthermore, the target is configured for each part such as the head and chest, and the joint part of each part is joined by a buffer part different from the material of the part (the shock part makes it difficult for shock vibration to be transmitted between parts) ), Detecting the impact vibration generated in each part at the time of landing from the strain detector or acceleration detector attached to each part, and processing by a signal processing circuit equipped with a filter and a comparator, A landing site detection device that can accurately estimate the landing site and is resistant to disturbance can be obtained.

  In this way, a detector can be mounted on a hidden target or a moving target to provide presence / absence of landing, landing position information, and landing site information.

It is a figure which shows the structural example which attached the distortion detector to the target in the landing detection apparatus which concerns on embodiment of this invention. It is a figure which shows the structural example which attached the acceleration detector to the target in the landing detection apparatus which concerns on embodiment of this invention. It is a figure which shows the structural example which attached the acceleration detector to the target holding part in the landing detection apparatus which concerns on embodiment of this invention. It is a figure which shows the structural example which divided the target in every part in the impact detection apparatus which concerns on embodiment of this invention, joined these parts with the buffer material, and attached the distortion detector for every part. It is a figure which shows the internal structure of the signal processing circuit in the landing detection apparatus which concerns on this embodiment. It is a figure which shows the structural example of the impact position detection in the impact detection apparatus which concerns on this embodiment. It is a figure explaining the landing erroneous detection by the secondary vibration derived | led-out from the impact vibration at the time of landing. It is a figure which shows the comparison of the impact vibration at the time of landing and a disturbance signal. It is a figure which shows the waveform of the signal processing in the landing detection apparatus which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Humanoid target 2 Square target 3 Strain detector 4 Acceleration detector 5 Target gripping part 6 Target head part 7 Target chest part 8 Buffer part 9 Signal processing circuit 10 Amplifying circuit 11 Filter 12 Comparator 13 Reference voltage 14 Time difference detection circuit 15 Temperature Detection circuit 16 Mounting position information of each detector 17 Landing position calculation unit 18 Monostable multivibrator

Claims (7)

In the landing detection device in the shooting training device,
Attach a strain detector or acceleration detector to the target itself to detect impact when landing,
Excludes disturbance from the detection signal of the detector, and performs signal processing to pass only the impact signal upon landing,
The landing detection device, wherein presence / absence and / or landing position of the landing on the target is detected. In claim 1,
An impact detection apparatus comprising a filter that allows only an impact signal at the time of impact to pass. In claim 1 or 2,
Install multiple strain detectors or acceleration detectors,
Detect the time difference of the impact signal when landing from each detector,
A landing detection device, wherein the landing position on the target is detected by calculating the time difference detection signal and the mounting position information of each detector. In claim 1, 2 or 3,
Instead of attaching a strain detector or an acceleration detector to the target itself, the strain detector or the acceleration detector is attached to a target gripping part to which the target is attached. In the landing detection device in the shooting training device,
A target is formed for each target site with the head and chest as an example, and the target site is joined with a buffer unit,
Attach a strain detector or an acceleration detector for each target site to detect impact when landing,
Excludes disturbance from the detection signal of the detector, and performs signal processing to pass only the impact signal upon landing,
The landing detection device, wherein presence / absence of landing on the target and / or target site of landing is detected. In claim 5,
An impact detection apparatus, comprising: a filter that passes only the impact signal at the time of impact. In claim 5 or 6,
The impact detecting device, wherein the buffer portion uses a material different from the material of the target site.

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