JPH02196988A - Ultrasonic detecting device for vehicle - Google Patents
Ultrasonic detecting device for vehicleInfo
- Publication number
- JPH02196988A JPH02196988A JP1018816A JP1881689A JPH02196988A JP H02196988 A JPH02196988 A JP H02196988A JP 1018816 A JP1018816 A JP 1018816A JP 1881689 A JP1881689 A JP 1881689A JP H02196988 A JPH02196988 A JP H02196988A
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- Prior art keywords
- transducer
- circuit
- time
- detection
- ultrasonic
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Links
- 238000001514 detection method Methods 0.000 claims abstract description 61
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 2
- 238000002604 ultrasonography Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 14
- 238000012790 confirmation Methods 0.000 description 12
- 239000003990 capacitor Substances 0.000 description 5
- 230000003321 amplification Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
この発明は、車両に取付けられて近接物体の存在を報知
する車両用超音波検知装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ultrasonic detection device for a vehicle that is attached to a vehicle to notify the presence of a nearby object.
従来、車両のバンパーなどに超音波検知装置を設け、運
転者から見えない死角に超音波を送波して物体を検知す
るものがある。これにより、衝突を未然に防止する。BACKGROUND ART Conventionally, there are devices that detect objects by installing an ultrasonic detection device on the bumper of a vehicle and transmitting ultrasonic waves to a blind spot where the driver cannot see. This prevents collisions.
第１７図は従来の車両用超音波検知装置の一般的な電気
回路図であり、その構成および動作を第１８図のタイム
チャートと共に説明する。この装置は、送受波器ｌと送
信回路１０１と受信回路１０２とからなる。送受波器ｌ
に印加する送波信号（第１８図（Ａ））は、発振回路５
５で発生させた高周波信号をドライバ５６で増幅して得
られる。第１単安定回路５２は送波信号の休止期間を設
定し、第２単安定回路５４は印加期間を設定する。積分
回路５１は電源投入と同時に積分し、あるレベルになる
と第１単安定回路５２を駆動する。スイッチング回路５
３は第１積分回路５１の放電用である。FIG. 17 is a general electric circuit diagram of a conventional ultrasonic detection device for a vehicle, and its configuration and operation will be explained together with the time chart of FIG. 18. This device consists of a transducer l, a transmitting circuit 101, and a receiving circuit 102. transducer l
The transmission signal (FIG. 18(A)) applied to the oscillation circuit 5
It is obtained by amplifying the high frequency signal generated in step 5 with driver 56. The first monostable circuit 52 sets the rest period of the transmitted signal, and the second monostable circuit 54 sets the application period. The integrating circuit 51 integrates at the same time as the power is turned on, and drives the first monostable circuit 52 when a certain level is reached. switching circuit 5
3 is for discharging the first integrating circuit 51.
送受波器ｌの受波信号は、増幅回路５日で増幅した後（
第１８図（Ｂ））、検波回路５９で包絡線検波される。The received signal of transducer l is amplified by an amplifier circuit for 5 days (
In FIG. 18(B)), the envelope is detected by the detection circuit 59.
増幅した受波信号には人体の受波信号部ａと、床の受波
信号部すとがある。検波回路５９の出力（第１８図（Ｃ
））は、レベル検出回路６０で所定の検出レベルＬ＋に
達しているか否かを判別され、検出レベルト１以上の出
力（第１８図（Ｅ））が第２積分回路６１に入力される
。The amplified received signal includes a received signal part a of the human body and a received signal part 2 of the floor. Output of the detection circuit 59 (Fig. 18 (C)
)) is determined by the level detection circuit 60 whether it has reached a predetermined detection level L+, and the output of the detection level 1 or higher (FIG. 18(E)) is input to the second integration circuit 61.
第２積分回路６１は、検出レベルに達した入力信号の時
間的な幅が所定の時間幅にあるか否かを所定のレベルＬ
、（第１８図（Ｆ））で判別する。The second integration circuit 61 determines whether or not the temporal width of the input signal that has reached the detection level is within a predetermined time width.
, (FIG. 18(F)).
つまり、この時間が所定時間幅よりも・短いと、検知物
体の反射波ではなくノイズであると判断される。また、
第２積分回路６１により、ゲート回路５７からゲート信
号（第１８図（Ｄ））が印加され、入力波が所定の時間
内にあるか否かの判定も行われる。ゲート回路５７は、
第１単安定回路５２の信号を受けて一定時間後にゲート
信号（第１８図（Ｄ））を出し、その信号を第２積分回
路６１に送るいわゆる検出の距離を決定する時間ゲート
である。フリップフロップ６２は、第２積分回路６１に
おいて所定の時間幅がありゲート時間内にあると判断さ
れる入力波があるとき、その信号を記憶する（第１８図
（Ｇ））、この記憶は、第２単安定回路５４によりリセ
ットされ、反射波がなくなると記憶されなくなる。第３
積分回路６５はフリップフロップ６２の出力を積分する
。この積分出力（第１８図（Ｈ））は、２回連続して反
射波がゲート時間内にあればスイッチングレベルＬ。In other words, if this time is shorter than the predetermined time width, it is determined that the wave is not a reflected wave from the sensing object but is noise. Also,
The second integrating circuit 61 applies a gate signal (FIG. 18(D)) from the gate circuit 57, and also determines whether the input wave is present within a predetermined time. The gate circuit 57 is
This is a time gate that outputs a gate signal (FIG. 18(D)) after a certain period of time after receiving the signal from the first monostable circuit 52 and sends the signal to the second integrating circuit 61 to determine the so-called detection distance. The flip-flop 62 stores the signal when the second integrating circuit 61 determines that the input wave has a predetermined time width and is within the gate time (FIG. 18(G)). It is reset by the second monostable circuit 54, and when the reflected wave disappears, it is no longer stored. Third
Integrating circuit 65 integrates the output of flip-flop 62. This integrated output (FIG. 18 (H)) is at the switching level L if two consecutive reflected waves occur within the gate time.
に達するように設定しである。スイッチングレベルＬ、
に達した出力があると、第２スイッチング回路６３はリ
レー６４をオンさせる。リレー６４はブザー等の報知手
段を駆動するものである。It is set to reach . switching level L,
When there is an output that reaches this level, the second switching circuit 63 turns on the relay 64. The relay 64 is for driving a notification means such as a buzzer.
この超音波検知装置が正常に動作することの確認手段と
しては、電源投入時に装置のセルフチエツクを行い、正
常であればブザーにより一定期間連続音を発生し、断線
等の異常があれば断続音を発生するものが提案されてい
る。As a means of confirming that this ultrasonic detection device is operating normally, the device performs a self-check when the power is turned on. If it is normal, the buzzer will emit a continuous sound for a certain period of time, and if there is an abnormality such as a disconnection, an intermittent sound will be heard. It has been proposed to generate
しかし、現実に物体検知を行わずに動作確認するもので
あるため、使用者にとっては本当に物体が検知されるの
か不安が残る。そのため、結局は超音波を送受する送受
波器の前に手を近づけたりして検知動作の確認を行う場
合が多い。However, since the system checks the operation without actually detecting an object, the user remains concerned about whether the object will actually be detected. Therefore, in many cases, the detection operation is confirmed by bringing one's hand close to a transducer that transmits and receives ultrasonic waves.
このように、手で確認する場合に、っぎの不便が生じる
。In this way, when checking by hand, a certain amount of inconvenience arises.
（ａ）手を近づけて確認する場合゛、同乗者が居るとき
は一人が手を近づけ、他の人が車内で検知状態報知用の
ブザーにより確認することができる。しかし、−人だけ
で両方の作業を行うことはほとんど不可能である。すな
わち送受波器に手を近づけてブザー音を聞こうとしても
、車内に・ブザーが設置されている場合が多く、聞き取
り難い、また、何らかの物体を送受波器の近傍に固定し
て車内で確認する方法もあるが、必ずしも物体が良好な
超音波の反射物体であるとは限らず、動作確認できない
場合もある。(a) When checking by bringing your hand close: If there are fellow passengers, one person can bring their hand close and the other person can check using the buzzer that notifies the detection status inside the vehicle. However, it is almost impossible for one person to perform both tasks alone. In other words, even if you try to hear the buzzer sound by bringing your hand close to the transducer, the buzzer is often installed inside the car, making it difficult to hear, or fixing some kind of object near the transducer to check inside the car. There is a method to do this, but the object is not necessarily a good reflector of ultrasonic waves, and operation may not be confirmed in some cases.
（ｂ）車両を動かして検知可能な物体に近づけて確認す
ることは一人でも可能である。しかし、送受波器が複数
個ある場合は、それぞれに対して車両を動かす必要があ
り、非常に手間がかかる。また、適当な反射物体が見つ
からない場合もある。(b) It is possible for one person to move the vehicle closer to a detectable object and check it. However, if there are multiple transducers, it is necessary to move the vehicle to each one, which is very time-consuming. In addition, there are cases where a suitable reflective object cannot be found.
この発明の目的は、検知動作の確認を確実かつ簡単に行
える車両用超音波検知装置を堤供することである。An object of the present invention is to provide an ultrasonic detection device for a vehicle that allows reliable and easy confirmation of detection operation.
請求項（１）の車両用超音波検知装置は、送受波器の方
向を変化させる手段を設けたものである。送受波器は、
送信回路の発生する送波信号を送波し、反射波を受波す
るものである。The ultrasonic detection device for a vehicle according to claim (1) is provided with means for changing the direction of the transducer. The transducer is
It transmits the transmission signal generated by the transmission circuit and receives the reflected wave.
請求項（２）の車両用超音波検知装置は、前記送受波器
の方向を変える手段に代えて、送受波器による検知エリ
アを一時的に広げる手段を設けたものである。The ultrasonic detection device for a vehicle according to claim (2) is provided with means for temporarily expanding the detection area by the transducer in place of the means for changing the direction of the transducer.
請求項（１）の発明によると、送受波器をｖ／ｉ認用反
射物のある方向に向け、送波することにより、その確認
用反射物が検知され、受波回路により報知が行われる。According to the invention of claim (1), by directing the transducer in the direction of the v/i recognition reflective object and transmitting waves, the verification reflective object is detected and a notification is made by the wave receiving circuit. .
このように実際に検知動作を行わせて動作確認すること
ができる。確認用反射物は、地面または車両自体等が利
用される。In this way, the operation can be confirmed by actually performing the detection operation. The ground, the vehicle itself, or the like is used as the reflective object for confirmation.
請求項（２）の発明によると、動作確認時に検知エリア
を広げることにより、通常では検知されない地面や車体
が検知され、物体検知の報知が行われる。According to the invention of claim (2), by widening the detection area during operation confirmation, the ground and the vehicle body, which are normally not detected, are detected, and an object detection notification is performed.
Ｃ実施例〕
この発明の第１の実施例を第１図ないし第５図に基づい
て説明する。この例は請求項（１）の発明に対応する実
施例である。C Embodiment] A first embodiment of the present invention will be described based on FIGS. 1 to 5. This example is an embodiment corresponding to the invention of claim (1).
第２図はこの車両川幅音波検知装置を装備した車両を示
す、車体１５のバンパー２の両端に、２個の超音波の送
受波器１が各々設置し・である、送受波器１はブラケッ
ト４に取付けてあり、各ブラケット４を起倒自在に遊嵌
するスリット状の開口部３をバンパー２に設けである。Figure 2 shows a vehicle equipped with this vehicle width sonic detection device. Two ultrasonic transducers 1 are installed at both ends of the bumper 2 of the vehicle body 15. The transducers 1 are mounted on brackets. 4, and the bumper 2 is provided with a slit-shaped opening 3 into which each bracket 4 is loosely fitted so that it can be raised and lowered.
第】図は送受波器１を方向可変に支持する方向可変手段
１００を示す、送受波器ｌは信号線１３により送信回路
１０１および受信回路１０２に接続しである。送信回路
１０１および受信回路１０２は第１７図の構成のもので
ある。送受波器１を取付けたブラケット４は、取付台６
に水平な支軸５回りで回動自在に支持し、取付台６はビ
ス８およびナツト９でバンパー２に固定しである。取付
台６にはブラケット４を起立角度で係止する通常時用の
ストッパ１１と、水平角度で係止する検査用のストッパ
１２とが設けである。ブラケット４を固定した支軸５に
はアーム１６を固定し、アーム１６と取付台６のばね掛
は片６ａとの間にばね７を掛装しである。ばね７はアー
ム１６とともにトグル機構を構成しており、送受波器ｌ
が起立角度にあるときにはブラケット４をストッパｌｌ
側に付勢し、中立位置よりも倒れ角度にあるときは前記
と逆にストッパ１２側に付勢する。FIG. 1 shows a direction variable means 100 for supporting a transducer 1 in a variable direction. The transmitting circuit 101 and the receiving circuit 102 have the configuration shown in FIG. The bracket 4 to which the transducer 1 is attached is attached to the mounting base 6
The mounting base 6 is fixed to the bumper 2 with screws 8 and nuts 9. The mounting base 6 is provided with a stopper 11 for normal use that locks the bracket 4 at an upright angle, and a stopper 12 for inspection that locks the bracket 4 at a horizontal angle. An arm 16 is fixed to the support shaft 5 to which the bracket 4 is fixed, and a spring 7 is hung between the arm 16 and the spring 6a between the arm 16 and the mounting base 6. The spring 7 constitutes a toggle mechanism together with the arm 16, and the transducer l
When the is at the standing angle, move the bracket 4 to the stopper ll
When the tilt angle is lower than the neutral position, it is biased toward the stopper 12 side, contrary to the above.
上記構成の動作を説明する６通常走行時は、第１図に示
すようにブラケット４を起立させて送受波器ｌを前向き
とする。このとき、送受波器ｌはブラケット４がばね７
でストッパ１１に押し付けられることにより安定する。6. Operation of the above structure will be explained 6. During normal running, the bracket 4 is erected and the transducer 1 faces forward as shown in FIG. At this time, the transducer l has the bracket 4 connected to the spring 7.
It is stabilized by being pressed against the stopper 11.
このときの検知エリア２０は、第５図（Ａ）、（Ｂ）に
示すように車体１５の斜め丹前側にある。The detection area 20 at this time is located on the diagonal Tangen side of the vehicle body 15, as shown in FIGS. 5(A) and 5(B).
動作確認する場合は、送受波器ｌを手で押してブラケッ
ト４を第４図に示すように倒す、このとき、ブラケット
４はばね６でストッパ１２に押し付けられるので、倒れ
状態に保持される。このときの検知エリア２０は、第５
図（Ｃ）に示すように下向きとなり、超音波の送波によ
り地面４０からの反射波が検出される。地面４０が検出
されると、受信回路１０２によりブザー等の報知手段を
駆動し、物体の検出を報知する。送受波器ｌを元の前向
きに戻すと、通常の動作状態になる。To check the operation, push the transducer l by hand to tilt the bracket 4 as shown in FIG. 4. At this time, the bracket 4 is pressed against the stopper 12 by the spring 6, so it is held in the tilted state. The detection area 20 at this time is the fifth
As shown in Figure (C), the direction is downward, and reflected waves from the ground 40 are detected by transmitting ultrasonic waves. When the ground 40 is detected, the receiving circuit 102 drives a notification means such as a buzzer to notify that an object has been detected. When the transducer l is returned to its original forward position, it is in its normal operating state.
このように、送受波器ｌの方向を変えることにより地面
４０を検知して動作確認が行える。そのため、ｉ認用反
射物を探すことが不要であり、また送受波器１を倒した
まま検知状態が保持でき、−人でも簡単に動作確認する
ことができる。送受波器ｌを倒すだけで良いので、送受
波器ｌが複数個あっても同時に簡単に確認することがで
きる。In this way, by changing the direction of the transducer l, the ground 40 can be detected and the operation can be confirmed. Therefore, it is not necessary to search for a reflective object for i recognition, and the detection state can be maintained even when the transducer 1 is laid down, so that even a person can easily check the operation. Since it is sufficient to simply fold down the transducer l, even if there are a plurality of transducers l, they can be easily checked at the same time.
しかも、地面４０は良好な反射物であり、また実際に検
知動作を行わせて動作確認するので、正確な確認が行え
る。Moreover, since the ground 40 is a good reflector and the detection operation is actually performed to confirm the operation, accurate confirmation can be made.
第６図ないし第８図は、第２の実施例の方向可変手段２
００を示す、この例は、遠隔操作により送受波器ｌの方
向を変化させるようにしたものである。ブラケット４に
固定した支軸２３は車両の取付台（図示せず）に回転自
在に支持しである。6 to 8 show the direction variable means 2 of the second embodiment.
In this example, the direction of the transducer l is changed by remote control. A support shaft 23 fixed to the bracket 4 is rotatably supported on a mounting base (not shown) of a vehicle.
支軸２３にウオームホイル２４を固定し、ウオーム２２
をモータ２１の回転軸に固定しである。The worm wheel 24 is fixed to the support shaft 23, and the worm 22
is fixed to the rotating shaft of the motor 21.
第７図はモータ２１の駆動回路を示す、単安定マルチバ
イブレータすなわち単安定回路ＭＭＩおよび単安定回路
ＭＭ２の出力Ｑｌ、Ｑ２を第１および第２のパワートラ
ンジスタＴｒｉ、Ｔｒ２のベースに接続し、両トランジ
スタＴｒｉ、Ｔｒ２のコレクタ間にモータ２１を接続し
である。各コレクタは、各々抵抗を介して電源Ｂに接続
しである。単安定回路ＭＭＩの入力ＣＫＩにスイッチＳ
Ｗを、単安定回路ＭＭ２の入力ＣＫ２に、単安定回路Ｍ
ＭＩの出力Ｑｌを各々接続しである。FIG. 7 shows a drive circuit for the motor 21, in which the outputs Ql and Q2 of the monostable multivibrator, that is, the monostable circuit MMI and the monostable circuit MM2 are connected to the bases of the first and second power transistors Tri and Tr2. A motor 21 is connected between the collectors of transistors Tri and Tr2. Each collector is connected to a power supply B via a resistor. Switch S to input CKI of monostable circuit MMI
W to input CK2 of monostable circuit MM2, monostable circuit M
The outputs Ql of MI are connected to each other.
動作を説明する。運転席にあるスイッチＳＷを押すと（
第８図（Ａ））、単安定回路ＭＭＩがオン期間Ｔのパル
スを発止しく第８図（Ｂ））、この時第１のトランジス
タＴｒｉがオン、第２のトランジスタＴｒ２がオフとな
り、モータ２１には正方向の電流１１が流れる。そのた
め、モータ２１は正方向に回転し、送受波器ｌは前向き
から下向きに回転する。単安定回路−Ｍｌの出力Ｑ１が
オフになると、その立ち下がりにより単安定回路ＭＭ２
が時間幅Ｔのパルスを発生する（第８図（Ｄ））、この
時は、第１のトランジスタＴｒｉがオフ、第２のトラン
ジスタＴｒ２がオンとなり、前記と逆の電流■２が流れ
るので、モータ２１は逆方向に回転する。そのため、送
受波器１は元の前向きに戻る。なお、オン期間Ｔは送受
波器ｌが移動するのに十分な時間とし、送受波器ｌの上
下回動はストッパ（図示せず）で止めるようにする。Explain the operation. When you press the switch SW in the driver's seat (
8(A)), the monostable circuit MMI starts to emit a pulse with an on period T (FIG. 8(B)), and at this time, the first transistor Tri is turned on, the second transistor Tr2 is turned off, and the motor Current 11 in the positive direction flows through 21. Therefore, the motor 21 rotates in the forward direction, and the transducer 1 rotates downward from the front. When the output Q1 of the monostable circuit Ml turns off, its fall causes the output Q1 of the monostable circuit MM2 to turn off.
generates a pulse with a time width T (Fig. 8(D)).At this time, the first transistor Tri is turned off and the second transistor Tr2 is turned on, and a current 2 opposite to the above flows. Motor 21 rotates in the opposite direction. Therefore, the transducer 1 returns to its original forward position. The on period T is set to be a sufficient time for the transducer l to move, and the vertical movement of the transducer l is stopped by a stopper (not shown).
このように、遠隔操作で送受波器１の角度を変えること
ができるので、車内に乗ったままで動作Ｔ１１認が行え
る。In this way, since the angle of the transducer 1 can be changed by remote control, the operation T11 can be confirmed while remaining in the vehicle.
第９図および第１０図は第３の実施例を示す。FIGS. 9 and 10 show a third embodiment.
この例の方向可変手段３００は、送受波器ｌを水平回転
させるようにしたものであり、垂直な支軸３２の上端に
ブラケット３１を介して送受波器ｌを設置しである。支
軸３２は車体に支持台（図示せず）を介して回転自在に
支持してあり、支軸３２に固定したウオームホイル３３
をモータ３４のウオーム３５に噛合させである。モータ
３４の駆動回路は、第７図の回路を使用する。The direction variable means 300 of this example is configured to horizontally rotate a transducer l, and the transducer l is installed on the upper end of a vertical support shaft 32 via a bracket 31. The support shaft 32 is rotatably supported on the vehicle body via a support stand (not shown), and a worm wheel 33 is fixed to the support shaft 32.
is engaged with the worm 35 of the motor 34. The drive circuit for the motor 34 uses the circuit shown in FIG.
この構成の場合、通常走行時は、第１０図（Ａ）、（Ｂ
）のように検知エリア２０は斜め外側を向く、動作確認
時は、第１０図（Ｃ）に示すように両送受波器ｌを内側
へ回転させ、検知エリア２０の一部が重なるように対向
させる。In this configuration, during normal running, Figures 10 (A) and (B)
), the detection area 20 faces diagonally outward. When confirming operation, rotate both transducers inward as shown in Figure 10 (C), and place them facing each other so that part of the detection area 20 overlaps. let
このように送受波器ｌを対向させることにより、両送受
波器１が互いの超音波を受波することになり、あたかも
反射波を受波したのと同じ現象になる。これにより検知
動作の確認が行える。しかも、地面や車体からの反射を
使用して動作確認する場合と比べて、送波した超音波を
直接に受波するので、超音波の減衰が殆どなく、動作確
認の確実性が増す。By arranging the transducers 1 to face each other in this manner, both transducers 1 receive each other's ultrasonic waves, resulting in the same phenomenon as receiving reflected waves. This allows confirmation of the detection operation. Moreover, compared to the case where operation is confirmed using reflections from the ground or the vehicle body, since the transmitted ultrasonic waves are directly received, there is almost no attenuation of the ultrasonic waves, increasing the reliability of operation confirmation.
第１１図ないし第１３図は第４の実施例を示す。11 to 13 show a fourth embodiment.
この例は、送受波器１の検知エリアを一時的に広げる手
段を設けたものであり、請求項（２）の発明に対応する
。第１１図（Ａ）、 （Ｂ） におイテ、２゜は通常
走行時の検知エリア、２０′は拡大した検知エリアを示
す、検知エリアを広げる手段は、受波信号の増幅回路５
８（第１７図）のゲインを高める手段からなる。すなわ
ち、第１３図の増幅回路において、入力段のトランジス
タＴ「のエミッタ抵抗ＶＲを短絡させるスイッチＳＷＩ
を設けてあり、このスイッチＳＷ１が検知エリアを広げ
る手段となる。この増幅回路は、第１７図の増幅回路５
８に代えて設けたものであり、その他の超音波検知装置
全体の電気回路は第１７図の例と同様である。This example is provided with means for temporarily expanding the detection area of the transducer 1, and corresponds to the invention of claim (2). 11(A) and (B), 2° indicates the detection area during normal driving, and 20' indicates the expanded detection area. The means for expanding the detection area is the amplification circuit 5 of the received signal.
8 (FIG. 17). That is, in the amplifier circuit of FIG. 13, the switch SWI short-circuits the emitter resistance VR of the input stage transistor T.
This switch SW1 serves as a means for expanding the detection area. This amplifier circuit is the amplifier circuit 5 in FIG.
8, and the other electrical circuits of the entire ultrasonic detection device are the same as the example shown in FIG.
このように構成した場合、動作確認をする場合はスイッ
チＳＷ１を入れる。これによりエミッタ抵抗ＶＲが短絡
され、増幅回路のゲインが増す。With this configuration, switch SW1 is turned on when checking the operation. This short-circuits the emitter resistor VR and increases the gain of the amplifier circuit.
エミッタ抵抗ＶＲはゲイン調整用の可変抵抗であり、抵
抗値が小さくなるとゲインが高くなるが、短絡させるこ
とによりゲインが最大になる。そのため、検知エリア２
０が第１１図に示すように大きくなり、通常時では検知
されない車体１５のバンパー２や地面等が検知される。The emitter resistor VR is a variable resistor for gain adjustment, and as the resistance value decreases, the gain increases, but the gain is maximized by short-circuiting. Therefore, detection area 2
0 becomes large as shown in FIG. 11, and the bumper 2 of the vehicle body 15, the ground, etc., which are not detected under normal conditions, are detected.
第１２図（Ｂ）、（Ｃ）は通常時の受波信号の増幅出力
および検波回路出力を示し、（Ｄ）、（Ｅ）はゲイン増
大時の受波増幅出力および検波出力を示す、これよりわ
かるように、地面よりの反射波成分ｐによる検波出力成
分は、ゲイン増大時（Ｅ）では検出レベルＬ１を越える
。したがって地面が検出されることになる。Figures 12 (B) and (C) show the amplified output and detection circuit output of the received signal under normal conditions, and (D) and (E) show the received amplified output and detection output when the gain is increased. As can be seen, the detection output component due to the reflected wave component p from the ground exceeds the detection level L1 when the gain is increased (E). Therefore, the ground will be detected.
このように、検知エリアを一時的に広げることにより、
地面４０等を検出し、動作確認を行うので、確認が瞬時
に行え、しかも確実でがっ手間がかからない、また、検
知エリアを広げる手段は、エミッタ抵抗ＶＲを短絡させ
るスイッチＳＷ１のみで構成でき、機械的な可動部分が
不要であるため、構造が非常に簡単でコストも安く、故
障も少ない、しかも、車体に確認のための開口部３（第
１図）等を設けることが不要であり、車体の外観を損な
わない。In this way, by temporarily expanding the detection area,
Since the ground 40 etc. is detected and the operation is confirmed, the confirmation can be done instantaneously, and it is reliable and does not require much effort.In addition, the means to expand the detection area can be configured only by the switch SW1 that short-circuits the emitter resistor VR. Since no mechanical moving parts are required, the structure is very simple, the cost is low, and there are few failures, and there is no need to provide an opening 3 (Fig. 1) on the vehicle body for confirmation. Does not damage the appearance of the car body.
第１４図は第５の実施例を示す、この例は、送受波器ｌ
の送波信号の電圧を上げることにより検知エリアの拡大
を可能としたものである。すなわち、ドライバ５６′の
電源として、高電圧の電源Ｂｌと低電圧の電源Ｂ２とを
設け、これを切り換えるスイッチＳＷ２を設けたもので
ある。その他の構成は第１７図の例と同様である０通常
走行時は低電圧の電源Ｂ２に接続し、動作確認時は高電
圧の電源Ｂ２に切り換える。このように電源電圧を高く
することにより、送受波器１の印加電圧が高くなり、送
波される超音波が強くなる。そのため、受波増幅のゲイ
ンを上げた場合と同様に検知エリアが広がり、地面等の
反射波が検知される。FIG. 14 shows a fifth embodiment, in which the transducer l
By increasing the voltage of the transmitted signal, the detection area can be expanded. That is, a high voltage power source Bl and a low voltage power source B2 are provided as power sources for the driver 56', and a switch SW2 is provided to switch between them. The rest of the configuration is the same as the example shown in FIG. 17. During normal running, the vehicle is connected to the low-voltage power source B2, and when confirming operation, it is switched to the high-voltage power source B2. By increasing the power supply voltage in this way, the voltage applied to the transducer 1 increases, and the transmitted ultrasonic waves become stronger. Therefore, the detection area expands and reflected waves from the ground, etc., are detected in the same way as when the gain of the received wave amplification is increased.
第１１図の検知エリアの広がり、および第１２図の動作
は、この実施例のように送波信号の電圧を上げた場合も
同様である。このように、送波信号電圧を上げた場合も
、受波信号のゲインを大きくした場合と同様な各効果が
得られる。The expansion of the detection area shown in FIG. 11 and the operation shown in FIG. 12 are the same even when the voltage of the transmission signal is increased as in this embodiment. In this way, even when the transmit signal voltage is increased, the same effects as when the gain of the received signal is increased can be obtained.
第１５図および第１６図は第６の実施例を示す。FIGS. 15 and 16 show a sixth embodiment.
この例は、検知エリアを一時的に広げる手段として、検
波回路出力（第１５図（Ｃ））を通過させるゲート回路
５７（第１７図）のゲート時間を切り換え可能としたも
のである。その他の構成は第１７図の例と同様である。In this example, as a means for temporarily expanding the detection area, the gate time of the gate circuit 57 (FIG. 17) through which the detection circuit output (FIG. 15(C)) passes can be changed. Other configurations are similar to the example shown in FIG. 17.
ゲート時間の変更は、第１の単安定回路５２のパルス幅
の変更により行う、すなわち、第１６図に示すように、
第１単安定回路５２に時定数設定用の２個のコンデンサ
ＣＩ。The gate time is changed by changing the pulse width of the first monostable circuit 52, that is, as shown in FIG.
The first monostable circuit 52 includes two capacitors CI for setting a time constant.
Ｃ２を設け、これらコンデンサＣＩ、Ｃ２を切り換える
スイッチＳＷ３を設ける０通常時は低容量のコンデンサ
Ｃ２を接続し、動作ｉｉｍ時は大容量のコンデンサＣＩ
を接続する。C2 is provided, and a switch SW3 is provided to switch these capacitors CI and C2. 0 In normal operation, a low capacitance capacitor C2 is connected, and in operation iim, a large capacitor capacitor CI is connected.
Connect.
第１５図の（Ａ）〜（Ｆ）は、各々第１８図の（Ａ）〜
（Ｆ）と同じ部分の波形を示す、第１５図（Ｄ）は通常
時のゲート回路出力を、第１５図（Ｄ′）はゲート時間
を長くしたゲート回路出力を示す、第１５図（Ｂ）のＳ
、は近くの物体の受波増幅信号成分、Ｓオは遠くの物体
の受波信号増幅成分である。遠くの物体の受波信号増幅
成分ｓ２は、ゲート時間が短い通常時は、第３の積分回
路６５の出力（第１５図（Ｆ））として検出されないが
、ゲート時間が長い場合は第１５図（Ｆ′）に示すよう
に所定レベルＬｔを超えて検出される。(A) to (F) in Fig. 15 are (A) to (F) in Fig. 18, respectively.
Figure 15 (D) shows the waveform of the same part as (F), and Figure 15 (D') shows the gate circuit output during normal operation, and Figure 15 (D') shows the gate circuit output with a longer gate time. ) of S
, is the amplified received signal component of a nearby object, and SO is the amplified received signal component of a distant object. The received signal amplification component s2 of a distant object is not detected as the output of the third integrating circuit 65 (FIG. 15 (F)) when the gate time is short, but when the gate time is long, As shown in (F'), a level exceeding the predetermined level Lt is detected.
このように、通常のゲート時間では検出不能であった物
が検出可能となり、検知エリアが広がることがわかる。In this way, it can be seen that objects that were undetectable during the normal gate time can now be detected, and the detection area is expanded.
そのため、この場合も地面や車体等を検知して動作確認
を行うことができる。また、この場合も動作が瞬時に行
えて手間がかがらず、しかも構造が簡単という利点があ
る。Therefore, in this case as well, the operation can be confirmed by detecting the ground, the vehicle body, etc. In addition, this case also has the advantage of being able to operate instantly, requiring little effort, and having a simple structure.
請求項（１）の発明の車両用超音波検知装置は、送受波
器の方向を変化させる手段を設けたため、地面や車両自
体等に送受波器を向けることにより、動作確認すること
ができる。そのため、確認用反射物を探すことが不要で
、また検知状態が保持でき、−人でも簡単に動作確認す
ることができる。Since the ultrasonic detection device for a vehicle according to the invention of claim (1) is provided with means for changing the direction of the transducer, the operation can be confirmed by pointing the transducer toward the ground, the vehicle itself, or the like. Therefore, it is not necessary to search for a reflective object for confirmation, the detection state can be maintained, and even a person can easily confirm the operation.
しかも、確認用反射物として利用する地面や車両等は良
好な反射物であり、また実際に検知動作を行わせて動作
確認することができるので、正確な確認が行える。Moreover, the ground, vehicles, etc. used as reflective objects for confirmation are good reflective objects, and since the detection operation can be actually performed and the operation confirmed, accurate confirmation can be performed.
請求項（２）の発明によると、送受波器の送波および受
波による検知エリアを一時的に広げる手段を設けたので
、通常では検知されない地面や車体が検知される程度に
検知エリアを広げることにより、動作確認を行うことが
できる。そのため、簡単かつ確寞に動作確認することが
できる。検知エリアを広げる手段は、電気回路によって
構成でき、機械的な可動部分が不要であるため、構造が
簡単という効果がある。According to the invention of claim (2), a means is provided to temporarily widen the detection area by transmitting and receiving waves from the transducer, so that the detection area is widened to the extent that the ground and the vehicle body, which are normally not detected, can be detected. By doing so, you can confirm the operation. Therefore, operation can be easily and reliably confirmed. The means for expanding the detection area can be constructed by an electric circuit, and no mechanically moving parts are required, so the structure is simple.
第１図はこの発明の第１の実施例における送受波器方向
可変手段の断面図、第２図はその車体と送受波器との関
係を示す斜視図、第３図は第１図の■−■線断面図、第
４図は同じくその送受波器の動作確認時の状態を示す断
面図、第５図は同じくその動作説明図、第６図は第２の
実施例における送受波器方向可変手段の斜視図、第７図
は同じくその電気回路図、第８図は同電気回路の波形図
、第９図は第３の実施例の送受波器方向可変手段の斜視
図、第１θ図はその動作説明図、第１１図は第４の実施
例の動作説明図、第１２図はその波形図、第１３図は同
じくその増幅回路の電気回路図、第１４図は第５の実施
例の電気回路図、第１５図は第６の実施例の波形図、第
１６図はその電気回路図、第１７図は従来の車両用超音
波検知装置の電気回路図、第１８図はその波形図である
。
１・・・送受波器、２・・・バンパー、３・・・開口部
、４・・・ブラケット、６・・・支軸、７・・・ばね、
１５・・・車体、１００・・・方向可変手段、１０１・
・・送信回路、１０２・・・受信回路、２００．３００
・・・方向可変手段、ＳＷＩ・・・検知エリア拡大手段
であるスイッチ
即１
ζフ
図
第
図
（Ａ）
（Ｂ）
（Ｃ）
（Ａ）
ＣＫ、」１−一一一一
声
図
第
図
（Ａ）
第
図
（Ａ）
（Ｂ）
（Ｃ）
第１０
図
第１２図
第１３
図
（Ｄ）り一ト回路
第
図
第１８
図FIG. 1 is a sectional view of a transducer/receiver direction variable means in a first embodiment of the present invention, FIG. 2 is a perspective view showing the relationship between the vehicle body and the transducer, and FIG. 3 is a 4 is a cross-sectional view showing the state of the transducer at the time of operation confirmation, FIG. 5 is a diagram explaining the operation, and FIG. 6 is the direction of the transducer in the second embodiment. A perspective view of the variable means, FIG. 7 is an electric circuit diagram thereof, FIG. 8 is a waveform diagram of the electric circuit, and FIG. 9 is a perspective view of the transducer/receiver direction variable means of the third embodiment. 11 is an explanatory diagram of the operation of the fourth embodiment, FIG. 12 is a waveform diagram thereof, FIG. 13 is an electric circuit diagram of the amplifier circuit, and FIG. 14 is the fifth embodiment. Fig. 15 is a waveform diagram of the sixth embodiment, Fig. 16 is its electrical circuit diagram, Fig. 17 is an electrical circuit diagram of a conventional ultrasonic detection device for a vehicle, and Fig. 18 is its waveform. It is a diagram. DESCRIPTION OF SYMBOLS 1... Transducer/receiver, 2... Bumper, 3... Opening, 4... Bracket, 6... Support shaft, 7... Spring,
15...Vehicle body, 100...Direction variable means, 101.
...Transmission circuit, 102...Reception circuit, 200.300
...direction variable means, SWI...switch which is a detection area expansion means 1 Zeta diagram (A) (B) (C) (A) CK, 1-1111 voice diagram Figure 1 (A) Figure 10 (A) (B) (C) Figure 10 Figure 12 Figure 13 (D) Rito circuit diagram Figure 18
Claims (2)
波信号により駆動されて超音波を送波しかつ反射波を受
波する送受波器と、この送受波器の受波信号により報知
を行う受信回路とを備えた車両用超音波検知装置におい
て、前記送受波器の方向を変化させる手段を設けたこと
を特徴とする車両用超音波検知装置。(1) A transmission circuit that generates an ultrasonic transmission signal, a transducer that is driven by the transmission signal to transmit ultrasound and receive reflected waves, and a reception signal of this transducer What is claimed is: 1. A vehicular ultrasonic detection device comprising: a receiving circuit that performs notification according to the method of the present invention;
波信号により駆動されて超音波を送波しかつ反射波を受
波する送受波器と、この送受波器の受波信号により報知
を行う受信回路とを備えた車両用超音波検知装置におい
て、前記送受波器による検知エリアを一時的に広げる手
段を設けた車両用超音波検知装置。(2) A transmission circuit that generates an ultrasonic transmission signal, a transducer that is driven by the transmission signal to transmit ultrasonic waves and receive reflected waves, and a reception signal of this transducer What is claimed is: 1. An ultrasonic detection device for a vehicle, comprising: a receiving circuit that performs notification by means of a transmitter/receiver;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1018816A JPH02196988A (en) | 1989-01-26 | 1989-01-26 | Ultrasonic detecting device for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1018816A JPH02196988A (en) | 1989-01-26 | 1989-01-26 | Ultrasonic detecting device for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02196988A true JPH02196988A (en) | 1990-08-03 |
Family
ID=11982097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1018816A Pending JPH02196988A (en) | 1989-01-26 | 1989-01-26 | Ultrasonic detecting device for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02196988A (en) |
Cited By (6)
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| JPH06242237A (en) * | 1993-02-23 | 1994-09-02 | Matsushita Electric Works Ltd | Obstacle detecting sensor |
| JPH06331742A (en) * | 1993-05-26 | 1994-12-02 | Matsushita Electric Works Ltd | On-board ultrasonic sensor unit |
| JPH10160837A (en) * | 1996-12-02 | 1998-06-19 | Honda Motor Co Ltd | Radar apparatus |
| JPH11109030A (en) * | 1997-10-01 | 1999-04-23 | Fujitsu Ten Ltd | Onboard radar equipment |
| CN105702051A (en) * | 2016-04-11 | 2016-06-22 | 上海斐讯数据通信技术有限公司 | Vehicle early warning system and method and vehicle containing vehicle early warning system |
| JP2017167096A (en) * | 2016-03-18 | 2017-09-21 | パナソニックＩｐマネジメント株式会社 | Mounted state determination device and mounted state determination method |
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| JPS62293176A (en) * | 1986-06-12 | 1987-12-19 | Daihatsu Motor Co Ltd | Rear obstacle detecting device for automobile |
| JPS6444879A (en) * | 1987-08-13 | 1989-02-17 | Matsushita Electric Works Ltd | Ultrasonic object detector |
| JPH01134282A (en) * | 1987-10-19 | 1989-05-26 | Siemens Ag | Monitor for sensor |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06242237A (en) * | 1993-02-23 | 1994-09-02 | Matsushita Electric Works Ltd | Obstacle detecting sensor |
| JPH06331742A (en) * | 1993-05-26 | 1994-12-02 | Matsushita Electric Works Ltd | On-board ultrasonic sensor unit |
| JPH10160837A (en) * | 1996-12-02 | 1998-06-19 | Honda Motor Co Ltd | Radar apparatus |
| JPH11109030A (en) * | 1997-10-01 | 1999-04-23 | Fujitsu Ten Ltd | Onboard radar equipment |
| JP2017167096A (en) * | 2016-03-18 | 2017-09-21 | パナソニックＩｐマネジメント株式会社 | Mounted state determination device and mounted state determination method |
| WO2017159170A1 (en) * | 2016-03-18 | 2017-09-21 | パナソニックＩｐマネジメント株式会社 | Sensor mounting state determination device and sensor mounting state determination method |
| US20190018122A1 (en) * | 2016-03-18 | 2019-01-17 | Panasonic Intellectual Property Management Co., Lt d. | Sensor mounting state determination device and sensor mounting state determination method |
| US10571553B2 (en) | 2016-03-18 | 2020-02-25 | Panasonic Intellectual Property Management Co., Ltd. | Sensor mounting state determination device and sensor mounting state determination method |
| CN105702051A (en) * | 2016-04-11 | 2016-06-22 | 上海斐讯数据通信技术有限公司 | Vehicle early warning system and method and vehicle containing vehicle early warning system |
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