JP2011158205A - Firing detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a firing detector capable of highly accurately detecting firing timing of a projectile and usable for various applications. <P>SOLUTION: The firing detector 1 includes: a radio-frequency sensor 11 having a transmitting part 11a projecting radio waves to a barrel 20a firing the projectile 21 and a receiving part 11b receiving reflected waves from the barrel 20a and detecting vibration of the barrel 20a generated by firing of the projectile 21 in the non-contact state; and a control device 12 detecting the firing timing of the projectile 21 by using a detection result obtained by controlling the radio-frequency sensor 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a launch detection device that detects the launch timing of a projectile.

  Projectiles such as missiles and shells can be used without problems in the event of design performance, the required landing accuracy or interception accuracy, or in the event of an emergency. Shooting tests are performed regularly or irregularly for the purpose of checking whether or not there is. In this shooting test, since the flight path and landing point of the projectile are measured with reference to the launch timing at which the projectile was launched, a launch detection device that detects the launch timing of the projectile is used.

Typical examples of the conventional launch detection apparatus include the following (1) to (3).
(1) Launch detection device using infrared sensor (2) Launch detection device using muzzle line (3) Launch detection device using vibration sensor

  The firing detection device shown in (1) is a device that detects the timing at which the flame generated when the explosive that launches the projectile detonates is detected by the infrared sensor as the launch timing of the projectile. The launch detection device shown in (2) above detects the timing at which the line was cut by launching the projectile as the launch timing of the projectile, with a wire (wire) stretched around the muzzle where the projectile is launched. It is a device to do.

  The firing detection device shown in (3) is a device that provides a vibration sensor such as an acceleration sensor in or near the barrel where the projectile is fired, and detects the timing at which the vibration is detected as the firing timing of the projectile. The following Patent Documents 1 and 2 disclose examples of conventional missile launchers.

Japanese Patent Laid-Open No. 06-323787 JP-T-2007-501370

  By the way, since the fire detection device shown in (1) described above uses an infrared sensor, if smoke is emitted before the flame, the infrared light is blocked by the smoke and the launch timing of the projectile can be detected. There is a problem that it cannot be done. In addition, since an infrared sensor is used, malfunction due to sunlight is likely to occur, and malfunctions frequently occur especially in marine applications (for example, for detecting the timing at which projectiles are fired from guns provided on escort ships). There is a fear.

  The launch detection device shown in (2) described above is the most reliable device at present because no malfunction occurs as in the launch detection device shown in (1) above. However, if the projectile is fired from the muzzle, the line stretched around the muzzle will be cut off, so it is necessary to work to stretch the line at the muzzle whenever the projectile is fired. There is a problem that this work takes time. Moreover, there is also a problem that it cannot be used for safety in marine applications.

  In the above-described launch detection device (3), for example, there is a possibility that erroneous detection may occur due to vibration generated when the projectile is filled in the barrel. In addition, the transmission characteristics of the path from the gun barrel to the vibration sensor cause a delay or variation in the time for the vibration generated in the gun barrel to reach the vibration sensor. Furthermore, in the marine application, the installation location of the vibration sensor is limited, and there is a problem that the sensor or wiring due to continuous use is likely to break down.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a launch detection device that can detect the launch timing of a projectile with high accuracy and can be used for various purposes.

In order to solve the above-described problem, a launch detection apparatus according to the present invention includes a launch detection apparatus (1-3) for detecting a launch timing of a projectile (21) launched from a gun barrel (20a). And non-contact sensors (11, 31) for detecting vibrations of the gun barrel caused by the non-contact, and a control device (12 for detecting the firing timing of the projectile using a detection result obtained by controlling the non-contact sensors) 32).
According to this invention, the vibration of the gun barrel caused by the firing of the projectile is detected by the non-contact sensor, and the firing timing of the projectile is detected by the control device using the detection result of the non-contact sensor.
Further, in the launch detection device of the present invention, the control device uses the detection result of the non-contact sensor to determine the timing at which a specific frequency corresponding to the vibration of the gun barrel caused by the launch of the projectile is obtained, It is detected as a firing timing of the projectile.
In the launch detection apparatus of the present invention, the specific frequency is a Doppler frequency corresponding to vibration of the gun barrel caused by firing of the projectile.
Further, the launch detection apparatus of the present invention includes a radio wave sensor for detecting a vibration of the gun barrel in a non-contact manner by receiving a reflected wave obtained by the non-contact sensor projecting a radio wave on the gun barrel, and a sound wave in the gun barrel. A sound wave sensor that receives a reflected wave obtained by projecting to the gun barrel and detects the vibration of the gun barrel in a non-contact manner; and a reflected wave obtained by projecting a light wave on the gun barrel to receive the vibration of the gun barrel in a non-contact manner. It is characterized by comprising at least one of a light wave sensor to detect.
Further, in the launch detection device of the present invention, when the non-contact sensor includes a plurality of sensors among the radio wave sensor, the sound wave sensor, and the light wave sensor, the control device detects all the sensors. The timing at which the specific frequency is obtained from each result is detected as the launch timing of the projectile.
Further, in the launch detection device of the present invention, the radio wave sensor, the sound wave sensor, and the light wave sensor are arranged so that the radio wave, sound wave, and light wave are projected from the oblique direction to the gun barrel, respectively. It is characterized by.

  According to the present invention, the vibration of the gun barrel caused by the launch of the projectile is detected by the non-contact sensor, and the launch timing of the projectile is detected by the control device using the detection result of the non-contact sensor. There is an effect that the firing timing can be detected with high accuracy. In addition, when smoke is emitted as in the conventional case, detection does not become impossible or malfunction due to sunlight or the like does not occur, and it is necessary to perform a work to stretch the line each time the projectile is launched. Therefore, there is an effect that it can be used for various purposes.

It is a figure which shows the principal part structure of the discharge | release detection apparatus by 1st Embodiment of this invention. It is a figure which shows the principal part structure of the discharge | release detection apparatus by 2nd Embodiment of this invention. It is a figure which shows the principal part structure of the discharge | release detection apparatus by 3rd Embodiment of this invention.

  Hereinafter, a launch detection apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a diagram showing a main configuration of a launch detection apparatus according to a first embodiment of the present invention. As shown in FIG. 1, the launch detection device 1 of this embodiment includes a radio wave sensor 11 (non-contact sensor) and a control device 12, and launches a projectile 21 that is fired from a cylindrical barrel 20 a of the gun 20. Detect timing. The cannon 20 is, for example, a howitzer, a high-fire gun, a war cannon, and the like, and the projectile 21 is, for example, a missile or a shell. The projectile 21 filled in the gun barrel 20a of the gun 20 is fired from the gun barrel 20a, for example, when explosives are detonated in the gun barrel 20a.

  The radio wave sensor 11 includes a transmission unit 11a that transmits radio waves (microwaves) and a reception unit 11b that receives radio waves. The radio wave sensor 11 projects radio waves from the transmission unit 11a toward the barrel 20a of the gun 20, and transmits radio waves. A reflected wave obtained by projecting onto the gun barrel 20a is received by the receiving unit 11b, and vibration of the gun barrel 20a is detected in a non-contact manner. The radio wave sensor 11 is supported by a tripod or the like at a position separated by about 10 meters from the gun barrel 20a, for example, and is arranged so that the projected radio wave is perpendicularly incident on the gun barrel 20a.

  Here, the vibration of the gun barrel 20a occurs not only when the projectile 21 is launched, but also when the projectile 21 is filled into the gun barrel 20a. The vibration that occurs during the filling is the magnitude of the vibration of the gun barrel 20a during launch. Very small compared. For this reason, the radio wave sensor 11 detects a large vibration of the gun barrel 20a that occurs when the projectile 21 is fired, but does not detect a slight vibration of the gun barrel 20a that occurs during filling.

  The control device 12 detects the launch timing of the projectile 21 using the detection result obtained by controlling the radio wave sensor 11. Specifically, the control device 12 performs detection timing control (set) and initialization timing control (reset) on the radio wave sensor 11. Further, using the detection result read from the radio wave sensor 11, the timing at which a specific frequency corresponding to the vibration of the gun barrel 20 a generated by the launch of the projectile 21 is obtained is detected as the launch timing of the projectile 21.

The control device 12 obtains the Doppler frequency corresponding to the vibration of the gun barrel 20a caused by the launch of the projectile 21 as the specific frequency. Here, the moving speed of the gun barrel 20a is V, the frequency of the radio wave transmitted from the transmitter 11a of the radio wave sensor 11 is f0, the speed of light is c, and the projection angle of the radio wave to the gun barrel 20a (the incident angle of the radio wave to the gun barrel 20a) is θ. Then, the Doppler frequency fd generated by the vibration of the gun barrel 20a is expressed by the following equation (1).
fd = (2 · V · f0 · cos θ) / c (1)

  From the above equation (1), it can be seen that the Doppler frequency fd corresponds to the vibration speed (movement speed V) of the gun barrel 20a generated when the projectile 21 is fired. Here, if the weight of the projectile 21 filled in the gun barrel 20a and the amount of explosive used are approximately the same, the vibration speed of the gun barrel 20a generated when the projectile 21 is fired is substantially the same. The resulting Doppler frequency fd is also substantially the same. For this reason, the control device 12 detects the timing at which the specific Doppler frequency fd generated by the vibration of the gun barrel 20 a is obtained as the firing timing of the projectile 21.

  Next, the operation of the launch detection apparatus 1 having the above configuration will be briefly described. First, before the projectile 21 is fired from the gun 20, the control device 12 controls the radio wave sensor 11 to project radio waves from the transmission unit 11a toward the gun barrel 20a. When radio waves are projected from the transmitter 11a toward the gun barrel 20a, a part of the radio waves are reflected by the gun barrel 20a and received by the receiver 11b of the radio wave sensor 11, and vibration of the gun barrel 20a is detected in a non-contact manner. This detection result is input to the control device 12 to detect the presence or absence of a specific Doppler frequency fd caused by the vibration of the gun barrel 20a. Note that the Doppler frequency fd is not detected while the projectile 21 is not being fired.

  Now, assuming that the projectile 21 is filled with gunpowder in the gun barrel 20a of the gun 20, and then the gunpowder is detonated, the projectile 21 is fired from the gun barrel 20a. At this time, the gun barrel 20 a vibrates due to the explosive of the explosive and the launch of the projectile 21, and the vibration is detected by the radio wave sensor 11. When this detection result is input to the control device 12, the Doppler frequency fd is obtained, and the timing at which the Doppler frequency fd is obtained is detected as the firing timing of the projectile 21.

  As described above, in the present embodiment, the vibration of the gun barrel 20a generated when the projectile 21 is launched is detected in a non-contact manner using the radio wave sensor 11, and the projectile 21 is launched using this detection result. Since the timing is detected, the firing timing of the projectile can be detected with high accuracy. Moreover, detection is not impossible when smoke is emitted as in the conventional case, and malfunctions due to sunlight or the like do not occur, and it is necessary to perform a work to stretch the line each time the projectile 21 is fired. There is no. For this reason, the launch detection apparatus 1 can be used for various purposes.

[Second Embodiment]
FIG. 2 is a diagram showing a main configuration of a launch detection apparatus according to the second embodiment of the present invention. As shown in FIG. 2, the launch detection device 2 of this embodiment includes a radio wave sensor 11, a sound wave sensor 31, and a control device 32, and launches a projectile 21 that is fired from a cylindrical barrel 20 a of the gun 20. Detect timing. The radio wave sensor 11 is the same as the radio wave sensor 11 shown in FIG. In FIG. 2, the radio wave from the radio wave sensor 11 is shown to be projected from the oblique direction with respect to the gun barrel 20a. However, the radio wave sensor 11 is, for example, the gun barrels 20a to 10 as in the first embodiment. It is supported by a tripod or the like at a position separated by about a meter, and for example, the projected radio wave is arranged so as to be perpendicularly incident on the gun barrel 20a.

  The sound wave sensor 31 includes a transmission unit 31a that transmits sound waves (ultrasonic waves) and a reception unit 31b that receives sound waves. The sound wave sensor 31 projects sound waves from the transmission unit 31a toward the barrel 20a of the gun 20, and generates sound waves. A reflected wave obtained by projecting onto the gun barrel 20a is received by the receiving unit 31b, and vibration of the gun barrel 20a is detected in a non-contact manner. Similar to the radio wave sensor 11, the sound wave sensor 31 is supported by a tripod or the like at a position separated from the gun barrel 20a by about 10 meters, for example, and is disposed so that the projected sound wave is perpendicularly incident on the gun barrel 20a.

  The control device 32 detects the firing timing of the projectile 21 using the detection result obtained by controlling the radio wave sensor 11 and the sound wave sensor 31. Specifically, the Doppler frequency is detected from each of the detection result of the radio wave sensor 11 and the detection result of the sound wave sensor 31, and the timing at which each Doppler frequency is obtained is detected as the launch timing of the projectile 21. Thus, the detection timing of the projectile 21 is detected by combining the detection result of the radio wave sensor 11 and the detection result of the sound wave sensor 31 in order to prevent erroneous detection due to disturbance such as birds.

  The launch detection device 2 of the present embodiment detects the Doppler frequency from the detection result of the radio wave sensor 11 and detects the timing at which the Doppler frequency is obtained from the detection result of the sound wave sensor 31 as the launch timing of the projectile 21. As described above, the launch detection device 2 of the present embodiment is that the launch timing of the projectile 21 is detected by combining the detection result of the radio wave sensor 11 and the detection result of the sound wave sensor 31. Unlike FIG. 1, the basic operation is the same as that of the launch detection apparatus 1 of the first embodiment. For this reason, also in the launch detection apparatus 2 of the present embodiment, the launch timing of the projectile can be detected with high accuracy, and the launch detection apparatus 2 can be used for various purposes.

[Third Embodiment]
FIG. 3 is a diagram showing a main configuration of a launch detection apparatus according to the third embodiment of the present invention. As shown in FIG. 3, the launch detection device 3 according to the present embodiment includes the radio wave sensor 11 and the control device 12, similar to the launch detection device 1 according to the first embodiment, and includes a cylindrical barrel 20 a of the gun 20. The firing timing of the projectile 21 to be fired is detected.

  However, in the above-described launch detection device 1 of the first embodiment, the radio wave sensor 11 is arranged so that the radio wave is perpendicularly incident on the gun barrel 20a. On the other hand, in the launch detection device 3 of the present embodiment, the transmission unit 11a and the reception unit 11b of the radio wave sensor 11 are provided as separate bodies, and radio waves from the transmission unit 11a are obliquely directed to the gun barrel 20a. The receiving unit 11b detects a radio wave that is incident and reflected obliquely from the barrel 20a.

  When the projectile 21 is fired, the barrel 20a moves more in the axial direction than the radial direction of the normal barrel 20a. For this reason, there is an advantage that the Doppler frequency can be easily detected by making the radio wave incident on the gun barrel 20a from an oblique direction. In the case where the radio wave sensor 11 and the sound wave sensor 31 are provided as in the launch detection device shown in FIG. 2, both the radio wave and the sound wave may be incident on the gun barrel 20a from an oblique direction. One of the sound wave and the sound wave may be incident from an oblique direction, and the other may be incident vertically.

  In the example illustrated in FIG. 3, the aspect in which the transmission unit 11 a and the reception unit 11 b of the radio wave sensor 11 are provided separately has been described. However, if a mirror that reflects the radio wave transmitted from the transmission unit 11a toward the transmission unit 11a is attached to the gun barrel 20a, the radio wave sensor 11 in which the transmission unit 11a and the reception unit 11b are integrated can be used.

[Other Embodiments]
In the first and third embodiments described above, the radio wave sensor 11 is used to detect the vibration of the gun barrel 20a in a non-contact manner. In the second embodiment, the radio wave sensor 11 and the sound wave sensor 31 are used to suppress the vibration of the gun barrel 20a. It was detected by contact. However, instead of these, or in combination with these, vibration of the gun barrel 20a may be detected in a non-contact manner using a light wave sensor. Here, the light wave sensor includes a transmission unit that transmits light waves and a reception unit that receives light waves. The light wave sensor projects light waves from the transmission unit toward the barrel 20a of the gun 20, and projects the light waves onto the barrel 20a. The reflected wave obtained in this way is received by the receiver, and the vibration of the barrel 20a is detected in a non-contact manner.

  When a plurality of sensors such as the radio wave sensor 11, the sound wave sensor 31, and the light wave sensor are provided, the control device uses the timing at which the Doppler frequency is obtained from all the detection results of the plurality of sensors as the launch timing of the projectile 21. To detect. Further, when the light wave sensor is provided, the light wave from the light wave sensor may be incident on the gun barrel 20a from an oblique direction, as in the third embodiment.

  Since the radio wave transmitted from the radio wave sensor 10 propagates at the speed of light, the delay until the radio wave reflected by the gun barrel 20a is received by the receiving unit 11b is considered to be negligible. The same applies to the case where a light wave sensor is used. However, when the sound wave sensor 31 is used, the delay until the sound wave reflected by the gun barrel 20a is received by the receiving unit 11b is larger than when the radio wave sensor 10 or the light wave sensor is used. Therefore, when the sound wave sensor 31 is used, it is desirable to correct the timing at which the Doppler frequency is detected in consideration of the speed of sound.

1-3 Launch detection device 11 Radio wave sensor 12 Control device 20a Gun barrel 21 Projectile 31 Sound wave sensor 32 Control device

Claims (6)

In a fire detection device that detects the firing timing of a projectile fired from a gun barrel,
A non-contact sensor for detecting non-contact vibration of the barrel generated by the launch of the projectile;
A launch detection apparatus comprising: a control device that detects a launch timing of the projectile using a detection result obtained by controlling the non-contact sensor.   The control device detects, as a firing timing of the projectile, a timing at which a specific frequency corresponding to vibration of the gun barrel generated by the firing of the projectile is obtained, using a detection result of the non-contact sensor. The launch detection apparatus according to claim 1.   The launch detection apparatus according to claim 2, wherein the specific frequency is a Doppler frequency corresponding to vibration of the gun barrel caused by firing of the projectile. The non-contact sensor receives a reflected wave obtained by projecting radio waves onto the barrel and detects a vibration of the barrel in a non-contact manner;
A sound wave sensor that receives a reflected wave obtained by projecting a sound wave on the barrel and detects vibration of the barrel in a non-contact manner;
4. The launch according to claim 2, comprising at least one of a light wave sensor that receives a reflected wave obtained by projecting a light wave on the gun barrel and detects vibration of the gun barrel in a non-contact manner. 5. Detection device.   In the case where the non-contact sensor includes a plurality of sensors of the radio wave sensor, the sound wave sensor, and the light wave sensor, the control device determines the specific frequency from each of the detection results of all the sensors. The launch detection apparatus according to claim 4, wherein the obtained timing is detected as a launch timing of the projectile.   5. The radio wave sensor, the sound wave sensor, and the light wave sensor are arranged so that the radio wave, sound wave, and light wave are projected from an oblique direction to the gun barrel, respectively. 5. The launch detection device according to 5.

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