JP4923616B2 - Firing bullet count device - Google Patents

Firing bullet count device Download PDF

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JP4923616B2
JP4923616B2 JP2006048062A JP2006048062A JP4923616B2 JP 4923616 B2 JP4923616 B2 JP 4923616B2 JP 2006048062 A JP2006048062 A JP 2006048062A JP 2006048062 A JP2006048062 A JP 2006048062A JP 4923616 B2 JP4923616 B2 JP 4923616B2
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output value
value
fired
strain sensor
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JP2007225214A (en
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一明 芹澤
和宏 黒田
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Howa Machinery Ltd
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Description

本発明は、ガス圧作動による自動装填式銃に用いる発射弾数計数装置に関する。   The present invention relates to a projectile counting device used in a self-loading gun operated by gas pressure.

従来、ガス圧作動による自動装填式銃に用いる発射弾数計数装置は、弾丸による発射ガス圧を測定する圧力センサの出力値の変化が所定の値以上の時に弾丸が発射されたと判断するようになっている。特許文献１は、前記圧力センサが歪ゲージと固定抵抗によりブリッジ回路を構成して成る歪センサであって、弾丸による発射ガス圧で発射弾数計数装置の検出部のガス導入室を歪ませるようにし、そのガス導入室の歪みに応じて歪ゲージの抵抗値が変化するので、その抵抗値の変化に対応して出力される出力電圧を歪センサの出力値とし、前後の出力値の差から出される値を所定の値と比較するようになっている。
特許文献２には、歪ゲージの出力変化分が自動的に零点に補正することが開示されている。
特開２００５−２２６８４３号公報 特開平５−１６４５０９号公報 Conventionally, a fire bullet number counting device used for a self-loading gun operated by gas pressure determines that a bullet has been fired when a change in the output value of a pressure sensor that measures a fire gas pressure due to a bullet exceeds a predetermined value. It has become. Patent Document 1 is a strain sensor in which the pressure sensor forms a bridge circuit with a strain gauge and a fixed resistor, and the gas introduction chamber of the detection unit of the fired bullet number counting device is distorted by the fired gas pressure of a bullet. Since the resistance value of the strain gauge changes according to the strain of the gas introduction chamber, the output voltage output corresponding to the change of the resistance value is set as the output value of the strain sensor, and the difference between the output values before and after The value to be output is compared with a predetermined value.
Patent Document 2 discloses that the output change of the strain gauge is automatically corrected to the zero point.
JP 2005-226843 A JP-A-5-164509

特許文献１では、弾丸が銃身を通過することで生じる熱の影響や、野外射撃演習等における外気温度の影響により歪センサの出力値が温度ドリフトしても、歪センサの出力値を補正する手段を備えておらず、弾丸が銃身を通過する時間以外の歪センサの出力値を所定のしきい値の範囲で維持することができない。このことから、温度ドリフトによって歪センサの出力値が測定範囲外になる場合があり、その時には前後の出力値の差から出される値を出力できないので所定の値と比較できないおそれがあった。また、検出部に熱が伝わらないように、発射弾数計数装置に断熱材等を設けることが考えられるが、装置全体が重くなり射手に負担を与えることになる。特許文献２は歪ゲージについての説明であり、弾丸の発射における熱の影響を開示するものではない。
そこで本発明の課題は、上記問題点を解決するもので、歪センサの出力値が温度ドリフトしても、弾丸の発射を確実に判断できるようにした発射弾数計数装置を提供することを目的とする。 In Patent Document 1, means for correcting the output value of the strain sensor even if the output value of the strain sensor drifts due to the effect of heat caused by the bullet passing through the barrel or the influence of the outside air temperature in outdoor shooting exercises, etc. And the output value of the strain sensor other than the time for the bullet to pass through the barrel cannot be maintained within a predetermined threshold range. For this reason, the output value of the strain sensor may be out of the measurement range due to temperature drift, and at that time, the value derived from the difference between the previous and next output values cannot be output, so there is a possibility that it cannot be compared with a predetermined value. In order to prevent heat from being transmitted to the detection unit, it is conceivable to provide a heat insulating material or the like in the projecting bullet number counting device, but the entire device becomes heavy and places a burden on the shooter. Patent Document 2 is an explanation of a strain gauge, and does not disclose the influence of heat on bullet firing.
Accordingly, an object of the present invention is to solve the above-described problems, and an object thereof is to provide a fired bullet number counting device capable of reliably determining the firing of a bullet even when the output value of a strain sensor drifts in temperature. And

本発明の発射弾数計数装置は、ガス圧作動による自動装填式銃に用いる発射弾数計数装置であって、弾丸による発射ガス圧を測定する歪センサの出力値の変化が所定の値以上の時に弾丸が発射されたと判断するようにした発射弾数計数装置において、前記発射弾数計数装置には歪センサの出力値を補正する補正手段が備えられ、補正手段は、弾丸が銃身を通過する時間以外の歪センサの出力値を監視し、通過時間以外で所定のしきい値の範囲でない時に、出力値が所定のしきい値より上か下か判断し、上の時には出力値を１段下げ、下の時には出力値を１段上げ、この動作を繰り返して、次の弾丸が発射される前には歪センサの出力値が所定のしきい値の範囲で維持されるようにしことを特徴とする。
The fire bullet number counting device of the present invention is a fire bullet number counting device used for an automatic loading type gun operated by gas pressure, and a change in an output value of a strain sensor for measuring a fire gas pressure by a bullet is a predetermined value or more. In the fired bullet number counting device, which sometimes determines that a bullet has been fired, the fired bullet number counting device is provided with a correction means for correcting the output value of the strain sensor , and the correction means allows the bullet to pass through the barrel. The output value of the strain sensor other than the time is monitored, and it is determined whether the output value is above or below the predetermined threshold value when it is not within the predetermined threshold range other than the passing time. The output value is increased by one step at the time of lowering, and this operation is repeated so that the output value of the strain sensor is maintained within a predetermined threshold range before the next bullet is fired. And

本発明では、補正手段により弾丸が銃身を通過する時間以外の歪センサの出力値を所定のしきい値の範囲に補正することで、温度ドリフトによって歪センサの出力値が測定範囲外になることがないから、前後の出力値の差から出される値と所定の値が常に比較されるようになり、弾丸の発射を確実に判断することができる。   In the present invention, the output value of the strain sensor is outside the measurement range due to temperature drift by correcting the output value of the strain sensor other than the time for the bullet to pass through the barrel by the correcting means to the predetermined threshold range. Therefore, the value obtained from the difference between the output values before and after is always compared with the predetermined value, so that it is possible to reliably determine the bullet firing.

図１に示す自動装填式銃１は、例えば特公平４−７８９１８号公報に記載のように、発射された弾丸２が銃身３のガス漏れ孔４を通過すると、銃腔５内の発射ガスはガス漏れ孔４から規整子（図示しない）を経てシリンダ６内に導入され、そのガス圧によって図示しないピストン等から成るガス圧作動機構を作動させることで、排莢、装填、機関部の撃発準備が行われるようになっている。このガス圧作動による自動装填式銃１を用いて射撃演習を行なう際に、発射した弾丸２の弾数を自動的に計数する発射弾数計数装置７が銃１に取り付けられる。前記発射弾数計数装置７は、弾丸２による発射ガス圧を測定する歪センサ８の出力値Ａの変化が所定の値以上の時に弾丸２が発射されたと判断するようになっている。次に発射弾数計数装置７について説明する。規整子を外した規整子装着孔９にガス導入筒１１を備えた検出部１０が取り付けられている。ガス導入筒１１内側にはピストン側に開口するガス導入室１２が設けられ、ガス導入室１２は導入通路１３を介して銃身３のガス漏れ孔４と連通している。ガス導入筒１１の底壁には歪センサ８が取り付けられている。歪センサ８は、歪ゲージと固定抵抗によりブリッジ回路を構成したものであり、歪みにより歪ゲージの抵抗値が変化し、抵抗値の変化に対応した電圧が出力されるようになっている。これ以降、出力電圧を歪センサ８の出力値Ａとして説明する。歪センサ８の出力値Ａは微小であるので、増幅器により増幅されるようになっている。また、前記しきい値Ｐは、ある温度条件の下、弾丸２が銃身３を通過する時間Ｔ以外の歪センサ８の出力値Ａに対応し、僅かな幅が持たせてある。   As shown in, for example, Japanese Patent Publication No. 4-78918, the self-loading gun 1 shown in FIG. 1 is configured such that when a fired bullet 2 passes through a gas leak hole 4 of a barrel 3, It is introduced into the cylinder 6 from the gas leak hole 4 through a regulator (not shown), and the gas pressure operating mechanism including a piston (not shown) is operated by the gas pressure, so that exhausting, loading, and preparation for firing the engine unit are performed. Is to be done. When performing a shooting exercise using the self-loading gun 1 operated by the gas pressure, a firing bullet number counting device 7 for automatically counting the number of bullets 2 that have been fired is attached to the gun 1. The fire bullet number counting device 7 determines that the bullet 2 has been fired when the change in the output value A of the strain sensor 8 for measuring the fire gas pressure by the bullet 2 is greater than or equal to a predetermined value. Next, the fire bullet number counting device 7 will be described. A detector 10 having a gas introduction cylinder 11 is attached to a regulator mounting hole 9 from which the regulator is removed. A gas introduction chamber 12 that opens to the piston side is provided inside the gas introduction cylinder 11, and the gas introduction chamber 12 communicates with the gas leakage hole 4 of the barrel 3 through the introduction passage 13. A strain sensor 8 is attached to the bottom wall of the gas introduction cylinder 11. The strain sensor 8 comprises a bridge circuit made up of a strain gauge and a fixed resistance, and the resistance value of the strain gauge changes due to strain, and a voltage corresponding to the change in resistance value is output. Hereinafter, the output voltage will be described as the output value A of the strain sensor 8. Since the output value A of the strain sensor 8 is very small, it is amplified by an amplifier. The threshold value P corresponds to the output value A of the strain sensor 8 other than the time T during which the bullet 2 passes through the barrel 3 under a certain temperature condition, and has a slight width.

前記検出部１０には、ロックナット１４を介して処理手段１６、表示手段１７を備えた筐体１５が連結されている。その筐体１５は銃身３の先端側に取り付けられる。前記処理手段１６は、増幅器により増幅され、Ａ／Ｄ変換器でデジタル値に変換された歪センサ８の出力値Ａ１と出力値Ａ２の差から出される値Ｂを所定の値と比較し、所定の値以上であれば弾丸２が発射されたと認識して発射弾数を計数する計数部１８と、計数部１８で計数された弾数を表示手段１７に表示するための出力部１９とを備えている。処理手段１６、表示手段１７は、筐体１５に内蔵された電源（電池）２０で動作するようになっている。また、筐体１５には、電源（電池）２０によって動作する補正手段２１を備え、弾丸２が銃身３を通過する時間Ｔ以外の歪センサ８の出力値Ａを所定のしきい値Ｐの範囲に補正することで、次の弾丸２が発射される前には歪センサ８の出力値Ａが所定のしきい値Ｐの範囲で維持されるようにしてある。補正手段２１は、弾丸２が銃身３を通過する時間Ｔ以外の出力値Ａを監視し、通過時間Ｔ以外で所定のしきい値Ｐの範囲でない時に、出力値Ａが所定のしきい値Ｐより上か下か判断し、上の時には出力値Ａを１段下げ、下の時には出力値Ａを１段上げ、この動作を繰り返して出力値Ａを所定のしきい値Ｐの範囲に補正するようになっている。   A housing 15 having processing means 16 and display means 17 is connected to the detection unit 10 via a lock nut 14. The casing 15 is attached to the distal end side of the barrel 3. The processing means 16 compares a value B obtained from the difference between the output value A1 and the output value A2 of the strain sensor 8 amplified by an amplifier and converted into a digital value by an A / D converter with a predetermined value, A counting unit 18 for recognizing that the bullet 2 has been fired and counting the number of fired bullets, and an output unit 19 for displaying the number of bullets counted by the counting unit 18 on the display means 17. ing. The processing means 16 and the display means 17 are operated by a power source (battery) 20 built in the housing 15. Further, the casing 15 is provided with correction means 21 that is operated by a power source (battery) 20, and the output value A of the strain sensor 8 other than the time T during which the bullet 2 passes through the barrel 3 is within a predetermined threshold P range. Thus, the output value A of the strain sensor 8 is maintained within a predetermined threshold value P before the next bullet 2 is fired. The correction means 21 monitors the output value A other than the time T during which the bullet 2 passes through the barrel 3 and when the output value A is not within the predetermined threshold value P other than the passing time T, the output value A is the predetermined threshold value P. It is determined whether the output value A is higher or lower. When the output is higher, the output value A is decreased by one step. When the output is lower, the output value A is increased by one step. This operation is repeated to correct the output value A to a predetermined threshold value P range. It is like that.

次に発射弾数計数装置７の作動について説明する。発射弾数計数装置７を銃１に取り付けて射撃演習が行われ、弾丸２が発射されると、弾丸２による発射ガスがガス漏れ孔４、導入通路１３を介してガス導入室１２に発射ガスが導入される。導入されたガス圧によりガス導入室１２が直径方向に歪むので、ガス導入筒１１の底壁に取り付けた歪センサ８の前後の出力値Ａ１，Ａ２の差から出される値Ｂが所定の値以上となり、処理手段１６で弾丸２の発射と判断されて計数部１８の発射弾数が１つ繰り上がると共に、表示手段１７に１つ繰り上がった弾数が表示される。更に次の弾丸２が発射され、処理手段１６により弾丸２の発射と判断されると、計数部１８の発射弾数がもう１つ繰り上がると共に、表示手段１７にもう１つ繰り上がった弾数が表示される。この動作は弾丸２を発射する毎に繰り返されることになる。   Next, the operation of the fire bullet number counting device 7 will be described. When a shooting exercise is performed with the bullet number counting device 7 attached to the gun 1 and the bullet 2 is fired, the gas emitted by the bullet 2 is blown into the gas introduction chamber 12 via the gas leakage hole 4 and the introduction passage 13. Is introduced. Since the gas introduction chamber 12 is distorted in the diametrical direction by the introduced gas pressure, the value B obtained from the difference between the output values A1 and A2 before and after the strain sensor 8 attached to the bottom wall of the gas introduction cylinder 11 is equal to or greater than a predetermined value. Thus, it is determined by the processing means 16 that the bullet 2 has been fired, the number of bullets fired by the counting unit 18 is incremented by 1, and the number of bullets raised by 1 is displayed on the display means 17. When the next bullet 2 is further fired and it is determined by the processing means 16 that the bullet 2 has been fired, the number of bullets fired by the counting unit 18 is incremented by one and the number of bullets that have been incremented by the display means 17 is incremented. Is displayed. This operation is repeated every time the bullet 2 is fired.

また、弾丸２が銃身３を通過することで検出部１０の歪センサ８の出力値Ａが温度ドリフトするので、図２（ａ）のように、歪センサ８の出力値Ａが測定範囲外になる場合があり、その時には前後の出力値Ａ１，Ａ２の差から出される値Ｂを出力できない問題を起こすことになる。   Further, since the output value A of the strain sensor 8 of the detection unit 10 drifts due to the passage of the bullet 2 through the barrel 3, the output value A of the strain sensor 8 is out of the measurement range as shown in FIG. In this case, there arises a problem that the value B output from the difference between the preceding and subsequent output values A1 and A2 cannot be output.

ところが本実施形態では、筐体１５に電源（電池）２０によって動作する補正手段２１を備え、図２（ｂ）のように、弾丸２が銃身３を通過する時間Ｔ以外の歪センサ８の出力値Ａを所定のしきい値Ｐの範囲に補正することで、次の弾丸２が発射される前には歪センサ８の出力値Ａが所定のしきい値Ｐの範囲で維持されるようにしてあり、弾丸２が銃身３を通過することで生じる熱の影響や、野外射撃演習等における外気温度の影響により歪センサ８の出力値Ａが温度ドリフトしても、歪センサ８の出力値Ａが測定範囲外になることがないので、歪センサ８の前後の出力値Ａ１，Ａ２の差から出される値Ｂを確実に出力することができる。また、検出部１０と銃身３との間に断熱材などを取り付ける必要がないので、銃身３の先端側が重くならず射手に負担を与えることがない。   However, in this embodiment, the casing 15 is provided with the correction means 21 that is operated by the power source (battery) 20, and the output of the strain sensor 8 other than the time T during which the bullet 2 passes through the barrel 3 as shown in FIG. By correcting the value A within a predetermined threshold value P, the output value A of the strain sensor 8 is maintained within the predetermined threshold value P before the next bullet 2 is fired. Even if the output value A of the strain sensor 8 drifts due to the effect of heat caused by the bullet 2 passing through the barrel 3 or the influence of the outside air temperature in outdoor shooting exercises, the output value A of the strain sensor 8 Is not outside the measurement range, the value B derived from the difference between the output values A1 and A2 before and after the strain sensor 8 can be reliably output. Further, since it is not necessary to attach a heat insulating material between the detection unit 10 and the barrel 3, the tip side of the barrel 3 is not heavy and does not give a burden to the shooter.

尚、上記実施形態では発射弾数計数装置７を検出部１０と筐体１５とを一体として銃１に取り付けたが、図３に示すように、検出部１０と筐体１５とを分離させ、筐体１５を銃１の側部に取り付け具３０を介して取り付けるようにしてもよい。更に、表示手段１７を電源（電池）２０を備えた別の筐体３１に設けることで、必要時のみ筐体１５の処理手段１６に表示手段１７を接続させることが可能となり、筐体１５をより軽量とすることができる。   In the above embodiment, the shot number counting device 7 is attached to the gun 1 with the detection unit 10 and the casing 15 integrated, but as shown in FIG. 3, the detection unit 10 and the casing 15 are separated, The housing 15 may be attached to the side portion of the gun 1 via the attachment tool 30. Furthermore, by providing the display means 17 in another casing 31 equipped with a power source (battery) 20, it becomes possible to connect the display means 17 to the processing means 16 of the casing 15 only when necessary. It can be made lighter.

本発明の発射弾数計数装置を取り付けた銃を示す図である。It is a figure which shows the gun which attached the shot number counting device of this invention. 歪センサの出力値の状態を示す図である。It is a figure which shows the state of the output value of a distortion sensor. 他の実施例を示す図である。It is a figure which shows another Example.

符号の説明Explanation of symbols

１ 自動装填式銃
２ 弾丸
７ 発射弾数計数装置
８ 歪センサ
１２ ガス導入室
Ａ 出力値
Ｐ しきい値
Ｔ 弾丸が銃身を通過する時間 DESCRIPTION OF SYMBOLS 1 Automatic loading type gun 2 Bullet 7 Fire bullet number counting device 8 Strain sensor 12 Gas introduction chamber A Output value P Threshold value T Time for bullet to pass through barrel

Claims (1)

ガス圧作動による自動装填式銃に用いる発射弾数計数装置であって、弾丸による発射ガス圧を測定する歪センサの出力値の変化が所定の値以上の時に弾丸が発射されたと判断するようにした発射弾数計数装置において、前記発射弾数計数装置には歪センサの出力値を補正する補正手段が備えられ、補正手段は、弾丸が銃身を通過する時間以外の歪センサの出力値を監視し、通過時間以外で所定のしきい値の範囲でない時に、出力値が所定のしきい値より上か下か判断し、上の時には出力値を１段下げ、下の時には出力値を１段上げ、この動作を繰り返して、次の弾丸が発射される前には歪センサの出力値が所定のしきい値の範囲で維持されるようにしたことを特徴とする発射弾数計数装置。 An apparatus for counting the number of shots used in a self-loading gun operated by gas pressure so that it can be determined that a bullet has been fired when the change in the output value of a strain sensor that measures the gas pressure fired by a bullet exceeds a predetermined value In the fired bullet number counting device, the fired bullet number counting device is provided with a correcting means for correcting the output value of the strain sensor , and the correcting means monitors the output value of the strain sensor other than the time when the bullet passes through the barrel. When the output value is not within the predetermined threshold range other than the passage time, it is determined whether the output value is above or below the predetermined threshold value. When the output value is above, the output value is lowered by one step. The fire bullet counting device is characterized in that the output value of the strain sensor is maintained within a predetermined threshold range before the next bullet is fired by repeating this operation .
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JPH05164509A (en) * 1991-12-11 1993-06-29 Toshiba Corp Strain gage
JP2000046668A (en) * 1998-07-30 2000-02-18 Nippon Seiki Co Ltd Pressure detection device
JP2000088891A (en) * 1998-09-10 2000-03-31 Shimadzu Corp Bridge circuit and detector using the same
JP4375538B2 (en) * 2004-02-10 2009-12-02 豊和工業株式会社 Rifle firing number counting device

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