JP6630889B2 - Detection device - Google Patents
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Description
本発明は、送信機と受信機で構成される検知装置に関するものであり、特に送信機と受信機を対向し設置調整するための技術に関するものである。 The present invention relates to a detection device including a transmitter and a receiver, and more particularly, to a technique for adjusting a transmitter and a receiver facing each other.
従来の侵入者を検出する目的で使用されるこの種の検知装置としては、電磁波を送信する送信部を有する送信機と、受信部を有する受信機とを警戒区間を隔てて対向し、光軸を合せて設置する形態のものがある。警戒区間を通過する人間（侵入者）により、送信機から発射される電磁波が遮断され、受信機に到達しないことや、到達する電磁波が減少したことを検出して、警報信号を出力するものである。 As this type of detection device used for the purpose of detecting a conventional intruder, a transmitter having a transmission unit for transmitting electromagnetic waves and a receiver having a reception unit are opposed to each other with a guard interval, and the optical axis There is a form that is installed together. An electromagnetic signal emitted from the transmitter is cut off by a human (intruder) passing through the alert section, and it is detected that the electromagnetic wave that does not reach the receiver or that the electromagnetic wave that has reached the receiver has decreased, and an alarm signal is output. is there.
本発明における光軸とは、送信機の電磁波出力特性の中心軸や、受信機の電磁波入力特性の中心軸のことを指し、光学的な意味に限らない。また、これらの特性の中心軸が重なるよう対向させることを、光軸を合せるという。 The optical axis in the present invention refers to the central axis of the electromagnetic wave output characteristic of the transmitter and the central axis of the electromagnetic wave input characteristic of the receiver, and is not limited to the optical meaning. Opposing the central axes of these characteristics so as to overlap is referred to as aligning the optical axes.
送信機は受信機の設置方向に電磁波を発射するため、電磁波の発射特性に指向性を持つ。受信機も同様に送信機の設置方向から電磁波を受信するため、電磁波の受信特性に指向性を持つ。 Since the transmitter emits electromagnetic waves in the installation direction of the receiver, the transmitter has directivity in the emission characteristics of the electromagnetic waves. The receiver similarly receives the electromagnetic waves from the installation direction of the transmitter, and thus has directivity in the reception characteristics of the electromagnetic waves.
防犯用途として、人の視覚を刺激しないように電磁波として赤外線等の光線や、マイクロ波等の電波が用いられる。 For security use, light rays such as infrared rays and radio waves such as microwaves are used as electromagnetic waves so as not to stimulate human vision.
検知装置が十分な性能を発揮するためには送信部と受信部を正しく対向させ、十分な受信信号レベルとなるように調整しなくてはならない。受信信号レベルが低いと太陽光や車のヘッドライト、木々の揺れや猫などの動物の影響により誤動作が起こる。このような原因により誤動作の起こらない程度に検知装置が信号とノイズを弁別し、十分な性能を発揮できる受信信号レベルとして閾値１を設けている。 In order for the detection device to exhibit sufficient performance, the transmission unit and the reception unit must be correctly opposed to each other and adjusted so as to have a sufficient reception signal level. If the reception signal level is low, malfunctions occur due to the influence of sunlight, headlights of cars, swaying of trees, and animals such as cats. The detection device discriminates the signal and the noise to such an extent that a malfunction does not occur due to such a cause, and the threshold 1 is provided as a reception signal level at which sufficient performance can be exhibited.
送信機と受信機の間の警戒距離は一般的に数百メートルとなるものがあり、装置の設置時又はメンテナンス時の光軸調整には精度を要するため、従来の検知装置の送信機と受信機には照準器が設けられており、照準器を用いて光軸を調整する（例えば、特許文献１参照）。しかし、この照準器の精度は送信機及び受信機の大きさ及びコストの兼ね合いにより、十分なものを装備することができないため、受信信号レベルを電圧として取出しテスターで読み取り、受信機の光軸の微調整を行う方法が採られていた。また、受信信号レベルに応じた出力をレベルメータやLED等の表示を変える方式や、鳴動装置を鳴動させて断続音の鳴動時間や周期を変化させて受信信号レベルを知らせる方式（断続音方式）、鳴動装置を鳴動させてその音の周波数の変化により受信信号レベルを知らせる方式（音の周波数方式）があった（例えば、特許文献２参照）。 The caution distance between the transmitter and the receiver is generally several hundred meters, and the alignment of the optical axis at the time of installation or maintenance of the device requires precision. The machine is provided with a sight, and the optical axis is adjusted using the sight (for example, see Patent Document 1). However, the accuracy of this sight can not be equipped enough due to the size and cost of the transmitter and the receiver, so the received signal level is taken out as a voltage, read by a tester, and the optical axis of the receiver is checked. A method of performing fine adjustment was adopted. In addition, a method of changing the display according to the received signal level by changing the display of a level meter, LED, etc., or a method of notifying the received signal level by changing the ringing time and period of the intermittent sound by sounding a sounding device (intermittent sound method) There has been a method (a sound frequency method) in which a ringing device sounds and a received signal level is notified by a change in the frequency of the sound (for example, see Patent Document 2).
前記断続音方式や前記音の周波数方式では光軸調整時には受信信号レベルに応じて鳴動装置を鳴動させるが、受信信号レベルがあらかじめ設定した閾値２未満の場合は鳴動をさせず、閾値２に達した後に断続音や連続音を鳴動させる。 In the intermittent sound method or the sound frequency method, the sounding device sounds at the time of optical axis adjustment according to the received signal level, but does not sound when the received signal level is less than the preset threshold 2, and reaches the threshold 2 After that, it sounds an intermittent or continuous sound.
送信機の光軸調整の効率を高めるため受信機との間で無線通信を行い、送信機と受信機のどちらの光軸調整を行う際にも受信信号レベルの確認や、送信機側での受信機の設定変更や、受信機側で送信機の設定変更ができる装置があった。（例えば、特許文献３参照）。 Wireless communication is performed with the receiver to increase the efficiency of the optical axis adjustment of the transmitter.When adjusting the optical axis of either the transmitter or the receiver, check the received signal level or check the transmitter side. There are devices that can change the settings of the receiver and the settings of the transmitter on the receiver side. (For example, see Patent Document 3).
受信信号レベルは雨や雪、送信機や受信機のカバーの汚れなどにより減衰するため、このような原因により減衰した場合でも、誤って警報信号を出力しないように閾値１に達した後も受信信号レベルを高めることが求められる場合や、さらには設置環境において最も高いレベルに合わせることが要求される場合などがある。 Since the received signal level attenuates due to rain or snow, dirt on the cover of the transmitter or receiver, etc., even if it attenuates due to such a cause, the signal is received even after reaching the threshold 1 so as not to output an alarm signal by mistake. In some cases, it is required to increase the signal level, and in other cases, it is required to match the highest level in the installation environment.
受信信号レベルを高めるための方法として、テスター等の視覚的な表示により行う方法と、鳴動装置を鳴動させて知らせる方法があった。テスター等の視覚的な表示の読み取りを行うと正確な調整ができる。しかし、光軸調整時は視線を光軸調整装置に向けていなければ、光軸調整装置を調整者の過誤により逆方向に操作したり、大きく調整しすぎたりすることがある。その様な場合は、あらためてテスターから照準器に視線を移して光軸を調整するが、視線を移動させることは労力を要するため、照準器を確認しつつ光軸調整を行ったり、光軸調整装置を目視しつつ光軸調整装置の操作をしたり、光軸調整装置の操作の過誤が無いように調整を行うことが理想である。 As a method for increasing the reception signal level, there are a method of performing visual display using a tester or the like, and a method of making a ringing device sound to notify the user. When a visual display such as a tester is read, accurate adjustment can be performed. However, if the line of sight is not pointed at the optical axis adjusting device during the optical axis adjustment, the optical axis adjusting device may be operated in the opposite direction due to an error of the adjuster, or may be excessively adjusted. In such a case, the line of sight is moved from the tester to the sight again to adjust the optical axis.However, moving the line of sight requires labor, so adjust the optical axis while checking the sight, or adjust the optical axis. It is ideal that the optical axis adjustment device is operated while the device is visually observed, and that the adjustment is performed so that there is no error in the operation of the optical axis adjustment device.
光軸調整のためにはドライバーでネジを回したり、指でツマミやダイヤルを回したりして光軸調整機構を操作する必要があり、当然、光軸調整時には光軸調整装置に視線を向けていた方が操作に過誤が生じにくい。 In order to adjust the optical axis, it is necessary to operate the optical axis adjustment mechanism by turning the screw with a screwdriver or turning the knob or dial with a finger. Error is less likely to occur in operation.
一方、鳴動装置を鳴動させることにより受信信号レベルを知らせる方法では、照準器や光軸調整装置から視線を移動させる必要はないため受信信号レベルを確認しながら照準器や光軸調整装置を使用することができる。これらのことから、検知装置の光軸調整においては視覚的な表示より、音により受信信号レベルを知らせる方法が有効となる。 On the other hand, in the method of notifying the reception signal level by sounding the ringing device, it is not necessary to move the line of sight from the sight and the optical axis adjustment device, so that the sight and the optical axis adjustment device are used while checking the reception signal level. be able to. From these facts, in the optical axis adjustment of the detection device, a method of notifying the received signal level by sound rather than visual display is effective.
従来の、断続音方式の受信信号レベルと断続音周期の関係を図２に示す。断続音方式では、光軸を調整することで受信信号レベルが徐々に高くなり閾値２に達するまで鳴動装置は鳴動させず、閾値２から断続音を鳴動させ、受信信号レベルが高くなるとともに周期や鳴動時間を徐々に短くする。閾値１に達した後に連続音に切り替えることで、検知装置が十分な性能を発揮できる受信信号レベルに達したことがわかるものがあった。しかし、断続音方式では、連続音に切り替わった後は、受信信号レベルが上がっても同じ音が鳴り続けるため、光軸の精度を高めるためにはテスター等の表示の読み取りを行う必要があり、音では受信信号レベルがわからなくなる。 FIG. 2 shows the relationship between the received signal level of the conventional intermittent tone system and the intermittent tone period. In the intermittent sound method, the ringing device does not sound until the reception signal level gradually increases by adjusting the optical axis and reaches the threshold value 2, and the intermittent sound is sounded from the threshold value 2. Reduce the ringing time gradually. In some cases, switching to the continuous sound after reaching the threshold 1 indicates that the reception signal has reached a reception signal level at which the detection device can exhibit sufficient performance. However, in the intermittent sound method, after switching to the continuous sound, the same sound continues to sound even if the received signal level rises, so it is necessary to read the display of a tester or the like in order to improve the accuracy of the optical axis, With sound, the received signal level is not known.
従来の、音の周波数方式の受信信号レベルと音の周波数方式の関係を図３に示す。音の周波数方式では、受信信号レベルが閾値２に達するまでは鳴動装置は鳴動させず、閾値２に達すると最も音の周波数の低い音を鳴動させ、閾値１に達した後も受信信号レベルの変化に応じて音の周波数を変化させる。この方式では最も音が高くなる方向に光軸調整することで、受信信号レベルが最大となる状態に調整することができる。しかし、音の周波数方式では閾値１に達したか否か判断することができないため、必要以上に受信信号レベルを高めることとなり調整に時間がかかる場合があったり、視線を閾値１に達したか否かを表示する表示灯や、テスターに移すことで受信信号レベルを閾値１に達したことを確認したりすることとなる。 FIG. 3 shows a conventional relationship between a received signal level of a sound frequency system and a sound frequency system. In the sound frequency system, the ringing device does not ring until the reception signal level reaches the threshold value 2, and sounds the lowest sound frequency when the threshold value 2 is reached. The frequency of the sound is changed according to the change. In this method, by adjusting the optical axis in the direction in which the sound becomes highest, the reception signal level can be adjusted to the maximum. However, since it is not possible to determine whether or not the threshold value 1 has been reached with the sound frequency method, the received signal level may be increased more than necessary, and it may take a long time to adjust, or whether the line of sight has reached the threshold value 1 It will be confirmed that the received signal level has reached the threshold value 1 by moving to an indicator lamp for displaying whether or not the signal is received or to a tester.
コストの兼ね合いから前記連続音や前記断続音を鳴動させる鳴動装置として、圧電ブザーが用いられる。圧電ブザーは鳴動させる周波数によっては音圧が変わるため、鳴動させる周波数を可聴域の中でも、より狭い帯域（圧電ブザーが十分な音圧を鳴動させられる帯域）に限定する必要がある。例えば、音の周波数方式の場合、受信信号レベルが変化する範囲を一定として、周波数帯域を割り当てる範囲を狭くすると音の周波数を聴き取ることで受信信号レベルを判断することが困難となる。 A piezoelectric buzzer is used as a sounding device that sounds the continuous sound or the intermittent sound in consideration of cost. Since the sound pressure of the piezoelectric buzzer changes depending on the frequency at which it sounds, it is necessary to limit the sounding frequency to a narrower band (a band at which the piezoelectric buzzer can sound sufficient sound pressure) in the audible range. For example, in the case of the sound frequency system, if the range in which the received signal level changes is fixed and the range in which the frequency band is allocated is narrowed, it becomes difficult to determine the received signal level by listening to the sound frequency.
また、高齢者などは可聴周波数帯域が狭いため、圧電ブザーを鳴動させる周波数帯域を狭くしなければ、周波数の変化により音を聴き取ることができなくなることがある。 In addition, since the audible frequency band of an elderly person or the like is narrow, unless the frequency band for sounding the piezoelectric buzzer is narrowed, sound may not be heard due to a change in frequency.
これらのことから、狭い音の周波数の範囲を用いて、照準器を使用したり光軸調整装置を目視したりしながら、容易に受信信号レベルの調整を完了できる方法が必要とされる。 For these reasons, there is a need for a method that can easily complete the adjustment of the received signal level while using a sight and viewing the optical axis adjustment device using a narrow sound frequency range.
受信信号レベルが閾値２に達するまで鳴動装置は鳴動させず、閾値２から断続音方式により、断続音を鳴動させ、受信信号レベルに応じて断続音の周期や鳴動時間を変える。受信信号レベルが閾値１を超えるまで断続音方式で鳴動装置を鳴動させ、閾値１を超えた後は音の周波数方式により、連続音を鳴動させ、受信信号レベルに応じて連続音の音の周波数を変えて、鳴動装置を鳴動させる。 The ringing device does not ring until the reception signal level reaches the threshold value 2, emits an intermittent sound from the threshold value 2 according to the intermittent sound method, and changes the cycle and ringing time of the intermittent sound according to the reception signal level. The ringing device is sounded in an intermittent tone system until the received signal level exceeds the threshold value 1. After the threshold value is exceeded, a continuous sound is sounded according to the sound frequency system, and the frequency of the continuous sound is adjusted according to the received signal level. To change the ringing device to ring.
また、受信信号レベルが閾値１で切り替える際の断続音と、連続音の音の周波数を同一とすることが好ましい。 Further, it is preferable that the frequency of the intermittent sound when the received signal level is switched at the threshold value 1 and the frequency of the continuous sound are the same.
また、断続音の一度の鳴動中に音の周波数又は音色を変化させることが好ましい。 Further, it is preferable to change the frequency or timbre of the sound during a single intermittent sound.
本発明は、従来と同じ受信信号レベルの範囲（例えば、電圧で示すと１から５ボルトなど）の受信信号レベルを音で知らせるときに音の周波数方式を使用する受信信号レベルの範囲（例えば、電圧で示すと３ボルトから５ボルトなど）は狭くなり、従来と同じ受信信号レベル変化量あたりの音の周波数変化量とした場合に必要となる音の周波数帯域が狭くなるため、可聴周波数帯域の狭い人の可聴周波数帯域外またはその近くの周波数の音を使用する必要がなくなる。このため、高齢者のように可聴周波数帯域の狭い人であっても、調整が容易となる。 The present invention provides a received signal level range (for example, 1 to 5 volts in terms of voltage) that uses a sound frequency scheme when notifying the received signal level in the same range as the conventional one. (In terms of voltage, 3 volts to 5 volts, etc.) becomes narrower, and the sound frequency band required for the same sound frequency change per received signal level change becomes narrower. Eliminating the need to use sounds at frequencies near or near the narrow person's audible frequency band. For this reason, adjustment is easy even for a person having a narrow audible frequency band such as an elderly person.
また、圧電ブザーが十分な音圧を鳴動させられる音の周波数帯域に限って使用することができるようになるため、音の周波数方式部分で使用する音の周波数帯域の全域で十分な音圧により鳴動することができるようになり、一般的な可聴周波数帯域の人にも聴き取りやすくすることができる。 Also, since the piezoelectric buzzer can be used only in the frequency band of sound that can sound sufficient sound pressure, sufficient sound pressure can be used in the entire frequency band of sound used in the sound frequency method part It is possible to make a sound, and it is possible to make it easy for a person in a general audible frequency band to hear.
受信信号レベルが閾値２から閾値１に達するまでは断続音方式を使用することにより音の周波数を変化させず、断続音の鳴動と鳴動の間隔や長さを変化させることで、閾値１に達した後の音の周波数方式部分で鳴動に利用する音の周波数帯域を狭くしても、従来の音の周波数方式と同等の受信信号レベル変化量あたりの周波数変化量を確保することができ、光軸調整の難易度も同等とすることができる。 Until the reception signal level reaches the threshold 1 from the threshold 2, the frequency of the sound is not changed by using the intermittent sound method, but the threshold 1 is reached by changing the interval and length of the intermittent sound. Even if the frequency band of the sound used for ringing is narrowed in the frequency method part of the sound after the sound, the amount of frequency change per received signal level change equivalent to the conventional sound frequency method can be secured, The difficulty of axis adjustment can be made equal.
従来の断続音方式では閾値１に達した後は、テスター等を確認しながら調整する必要があったが、本発明によりテスター等の受信信号レベルを視覚的に表示するものを使用する必要が無いため、照準器や光軸調整装置に視線を向けて光軸調整を行うことができるようになり、光軸調整装置の操作の過誤を減らすことができ、過誤があった場合でも光軸の再調整が容易となる。 In the conventional intermittent tone system, after reaching the threshold 1, it was necessary to adjust while checking the tester or the like. However, according to the present invention, there is no need to use a tester or the like that visually displays the received signal level. Therefore, it is possible to adjust the optical axis by directing a line of sight to the sight and the optical axis adjustment device, and it is possible to reduce errors in operation of the optical axis adjustment device. Adjustment becomes easy.
以下、本発明の実施の形態について説明するが、以下の説明により本発明が限定されるものではない。以下においては照準器と鳴動装置が対向型検知装置と一体となっているものを例として説明するが、警戒時には取り外し、光軸調整時にのみ取り付けるものであってもよい。また、送信機に鳴動装置、送信機と受信機のそれぞれに通信機能を備え、受信機と送信機の間で通信を行い、受信信号レベルを送信機に送ることで、送信機に備えられた鳴動装置により受信信号レベルに応じた鳴動をさせてもよい。 Hereinafter, embodiments of the present invention will be described, but the present invention is not limited by the following description. Hereinafter, an example in which the sighting device and the sounding device are integrated with the facing-type detection device will be described. However, the sighting device and the sounding device may be detached at the time of caution and attached only at the time of optical axis adjustment. Also, the transmitter has a ringing device, and each of the transmitter and the receiver has a communication function, performs communication between the receiver and the transmitter, and sends a received signal level to the transmitter, so that the transmitter is provided. The ringing device may make a ringing according to the received signal level.
以下の実施例では送信機と受信機が分かれたものを説明するが、送信機と受信機が一体となったもの（送受信機）についても発明の範囲に含まれる。これは、送受信機と反射装置（電磁波を受信した方向に反射する再帰反射板など）とを警戒区間を隔てて対向し、光軸を合せて設置する検知装置である。送信機から発射される電磁波が遮断され、送受信機の受信部に電磁波が到達しないことや、反射装置と送受信機の間を遮断や、到達する電磁波の増加や減少、位相の変化を検出して、警報信号を出力するものである。 In the following embodiments, a case where a transmitter and a receiver are separated will be described. However, an integrated transmitter and receiver (transceiver) is also included in the scope of the invention. This is a detection device in which a transceiver and a reflection device (such as a retroreflection plate that reflects in the direction in which an electromagnetic wave is received) face each other across a warning section, and are installed with their optical axes aligned. The electromagnetic wave emitted from the transmitter is cut off, the electromagnetic wave does not reach the receiving part of the transceiver, the cutoff between the reflection device and the transceiver, the increase or decrease of the arriving electromagnetic wave, the change in phase is detected. Output an alarm signal.
本発明は、図１のような検知装置を構成する。送信機１０の送信部１２から電磁波１１が発射され、受信機２０の受信部２５にて受信され、受信部２５にて信号処理を行い受信信号レベル２２に変換される。受信信号レベル２２は受信信号レベル処理・判断部２６に入力され、受信信号レベル２２が閾値２に満たなければ警報出力部２７に検知信号２３が入力される。検知装置が光軸調整状態であれば鳴動装置２８に鳴動信号２４が入力される。警報出力部２７に検知信号２３が入力されると、警報出力部２７は図示されない警報受信機に警報信号２１を入力する。警報受信機は警備センターや建物の管理人室などに設置され、そこに常駐する人が監視を行う。
The present invention constitutes a detection device as shown in FIG. The electromagnetic wave 11 is emitted from the
検知装置のカバーを開けると検知装置の動作状態を切り替えるスイッチが働き、警戒状態から光軸調整状態となる。検知装置が警戒状態の時、又は光軸調整状態であっても音のＯＮ／ＯＦＦスイッチがＯＦＦとなっていた場合には鳴動信号２４は出力されない。検知装置が光軸調整状態で音のＯＮ／ＯＦＦスイッチがＯＮとなっており、かつ、受信信号レベル２２が閾値２以上の時に、鳴動信号２４が出力されるが、鳴動信号２４は受信信号レベル２２によって変化する。このときの鳴動の断続音の周期と、音の周波数、受信信号レベル２２の関係を図４に示す。
When the cover of the detection device is opened, a switch for switching the operation state of the detection device is activated, and the state is changed from the alert state to the optical axis adjustment state. The ringing
光軸調整において、未調整状態では受信信号レベル２２は閾値２よりも小さくなり無音となるため、送信機と受信機にそれぞれ設けられた照準器１３と照準器２９を用いて、電磁波の発射方向及び受信方向を光軸調整装置１４及び光軸調整装置２Ａを操作することで光軸を調整する。それぞれの光軸調整装置はツマミやダイヤルであれば指で、ネジ式であればドライバーを用いて、操作する構造となっている。
In the optical axis adjustment, in the unadjusted state, the received
粗調整を行い、受信信号レベル２２が閾値２に達すると、受信信号レベル処理・判断部２６は鳴動信号２４として断続音信号を入力し、鳴動装置２８は断続音を鳴動する。受信信号レベル２２が大きくなるにつれて、受信信号レベル処理・判断部２６は断続音の鳴動時間と鳴動の停止時間を短くなるよう鳴動信号２４を鳴動装置２８に入力し、鳴動装置２８は前述の鳴動信号２４に従って断続音を鳴動する。これにより、調整者は受信信号レベル２２を聴き分けることができるため、音を聴きながら照準器を使用しつつ、又は光軸調整装置を目視しつつ光軸を調整する。
When the coarse adjustment is performed and the received
さらに微調整を行い、受信信号レベル２２が閾値１に達すると、受信信号レベル処理・判断部２６は鳴動信号２４を断続音から連続音に切り替えて鳴動装置に入力する。連続音が鳴動したということは、受信信号レベル２２が閾値１に達し、検知装置がノイズと信号を弁別し、十分に性能を発揮できることを意味するため調整を完了してもよい。
Further fine adjustment is performed, and when the received
音の周波数方式では音の周波数と受信信号レベルを対応させているため、受信信号レベル２２が閾値１で断続音方式と音の周波数方式を切り替える際の断続音及び、連続音の音の周波数が離れていると、受信信号レベル２２が大きく変わった場合と同じように鳴動することがある。そうすると調整者は光軸の調整に過誤があったかのように感じる場合がある。よって、図４に示すように閾値１前後の断続音及び、連続音の音の周波数は一致するように動作させることで、このような誤解を避けることができる。
In the sound frequency system, the sound frequency and the reception signal level are associated with each other, so that the
受信信号レベル２２が閾値１に達した後も、受信信号レベル２２が大きくなるにつれて連続音の音の周波数は高くなる。この音の周波数の変化を聴き取ることで受信信号レベル２２を確認できるため、照準器を使用しつつ、又は光軸調整装置を目視しつつ光軸を調整する。
Even after the
このとき、音の周波数に対応して音圧を変化させることで、受信信号レベル２２の調整状態はより明確となるため、音の周波数が高くなるにつれて音圧も高くなるように鳴動させる。
At this time, the sound pressure is changed according to the frequency of the sound, so that the adjustment state of the received
光軸を最も音の周波数又は音圧が高くなるところに調整することで、受信信号レベル２２を検知器の設置環境における最大値に調整することができる。ただし、同じ機器を用いても受信信号レベル２２の最大値は設置環境や送信機と受信機の距離などによって異なる。
By adjusting the optical axis to a position where the sound frequency or sound pressure becomes highest, the
尚、上記実施例では、断続音の鳴動時の音の周波数や音色を変化させていないが、音の周波数をスイープ音などに変化させてもよい。スイープ音とは一度の鳴動中に音の周波数や音色が変化する音の事である。スイープ音のスイープ周波数範囲にブザーの特性上、音圧が高くなる音の周波数を含めることで通常の可聴周波数帯域を持つ人が聴き取りやすく、さらに高齢者等の可聴周波数帯域が狭い人でも聴き取りやすい音の周波数を含めることで、より多くの人にとって聴き取りやすくなる。 In the above embodiment, the frequency and tone of the sound at the time of the intermittent sound are not changed, but the frequency of the sound may be changed to a sweep sound or the like. A sweep sound is a sound in which the frequency or tone of the sound changes during a single sound. Due to the characteristics of the buzzer, the sweep frequency range of the sweep sound includes the sound frequency at which the sound pressure increases, making it easier for people with a normal audible frequency band to hear, and even for people with a narrow audible frequency band, such as the elderly. By including frequencies of sounds that are easy to pick up, it is easier for more people to hear.
また、鳴動させる音の信号は正弦波、矩形波やそれらの複合による様々なものを用いることができる。特に矩形波においては、周期を一定として、デューティ比を変えることで音色を変化させることができる。 Further, as the sound signal to be sounded, various signals based on a sine wave, a rectangular wave, or a combination thereof can be used. In particular, for a rectangular wave, the timbre can be changed by changing the duty ratio while keeping the period constant.
上記実施例では、図４において、断続音の周期及び音の周波数は、受信信号レベルに応じて線形的に変化させたが、非線形的に（例えば対数的など）周期や音の周波数を変化させてもよい。 In the above embodiment, in FIG. 4, the period of the intermittent sound and the frequency of the sound are changed linearly in accordance with the received signal level, but the period and the frequency of the sound are changed non-linearly (for example, logarithmic). You may.
以上、本発明の実施形態を説明したが、上述の実施形態は例として提示したものであり、発明の範囲は、これに限定するものではなく、その他の様々な形態で実施されることが可能であり、特許請求の範囲に記載された発明の範囲とその均等の範囲に含まれるものである。 Although the embodiment of the present invention has been described above, the above-described embodiment has been presented as an example, and the scope of the invention is not limited to this, and can be implemented in various other forms. , And are included in the scope of the invention described in the claims and their equivalents.
１０ 送信機
１１ 電磁波
１２ 送信部
１３ 照準器
１４ 光軸調整装置
２０ 受信機
２１ 警報信号
２２ 受信信号レベル
２３ 検知信号
２４ 鳴動信号
２５ 受信部
２６ 受信信号レベル処理・判断部
２７ 警報出力部
２８ 鳴動装置
２９ 照準器
２Ａ 光軸調整装置
REFERENCE SIGNS
Claims (5)
送信機と受信機の両方に照準器と光軸調整装置を備え、
前記送信機または受信機には、前記送信部より発射された電磁波を受信した受信信号レベルに応じた鳴動を行う圧電ブザーを備え、
前記圧電ブザーは断続音又は連続音の何れか一方を鳴動し、
前記連続音は受信信号レベルにより、音の周波数が変化し、
前記断続音は受信信号レベルにより、鳴動と鳴動の間隔または鳴動の長さまたはその両方が変化し、
前記受信信号レベルが閾値１に達するまでは断続音方式を使用し、前記閾値１に達した後は音の周波数方式を使用することを特徴とする検知装置。 In a detection device including a transmitter having a transmission unit that transmits an electromagnetic wave, and a receiver having a reception unit that receives an electromagnetic wave emitted from the transmitter,
Equipped with sight and optical axis adjustment device for both transmitter and receiver,
The transmitter or the receiver includes a piezoelectric buzzer that sounds according to a reception signal level of the electromagnetic wave emitted from the transmission unit,
The piezoelectric buzzer sounds either an intermittent sound or a continuous sound,
The frequency of the continuous sound changes depending on the received signal level,
The intermittent sound changes the interval between sounds and the length of the sound or both depending on the received signal level,
Until it said received signal level reaches the threshold 1 uses intermittent sound method, detection apparatus, characterized in that you use the frequency scheme of the sound after it has reached the threshold value 1.
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