JPH0346883U - - Google Patents
Info
- Publication number
- JPH0346883U JPH0346883U JP10731189U JP10731189U JPH0346883U JP H0346883 U JPH0346883 U JP H0346883U JP 10731189 U JP10731189 U JP 10731189U JP 10731189 U JP10731189 U JP 10731189U JP H0346883 U JPH0346883 U JP H0346883U
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- detecting
- monitor
- detection device
- monitor reflector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 claims 1
- 230000005856 abnormality Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
第１図はこの考案にかかる第１の実施例を示す
回路図、第２図は第１の実施例にかかるタイミン
グチヤート、第３図は第２の実施例を示す回路図
、第４図は第２の実施例にかかるタイミングチヤ
ート、第５図は第３の実施例を説明するタイミン
グチヤート、第６図はこの考案を自動車のコーナ
ーセンサに適用した場合の取付け状態の一例を示
す要部斜視図である。
１……超音波送受波器、２……モニタ反射体、
５，５１……マイコン、６……送波増幅回路、７
……受波増幅回路、８，８１，８２……検波回路
、９１，９２……分圧抵抗部、ＶＴＨ１……検波
回路８１のしきい値、ＶＴＨ２……検波回路８２
のしきい値、ＴＧ……距離ゲート、Ｔ１，Ｔ１′
……モニタ反射体信号発生時点。
Fig. 1 is a circuit diagram showing a first embodiment of this invention, Fig. 2 is a timing chart of the first embodiment, Fig. 3 is a circuit diagram showing a second embodiment, and Fig. 4 is a circuit diagram showing a second embodiment. A timing chart according to the second embodiment, FIG. 5 is a timing chart explaining the third embodiment, and FIG. 6 is a perspective view of main parts showing an example of an installation state when this invention is applied to an automobile corner sensor. It is a diagram. 1... Ultrasonic transducer, 2... Monitor reflector,
5, 51...Microcomputer, 6...Transmission amplifier circuit, 7
... Receiving amplifier circuit, 8, 81, 82 ... Detection circuit, 91, 92 ... Voltage dividing resistor section, VTH 1 ... Threshold value of detection circuit 81, VTH 2 ... Detection circuit 82
threshold value, TG...distance gate, T 1 , T 1 '
...At the time the monitor reflector signal is generated.
Claims (1)
る超音波検知装置において、送波から一定時間経
過後、該超音波検知装置から一定距離位置に設け
られるモニタ反射体からの受波信号を検出するモ
ニタ反射体検出手段と、該検出手段出力が存在し
ない場合に上記超音波検知装置を異常と判断する
判別手段とを備えたことを特徴とする超音波検知
器の異常検出装置。 In an ultrasonic detection device that detects the presence or absence of a target by transmitting and receiving ultrasonic pulses, after a certain period of time has elapsed since the transmission, a received signal from a monitor reflector installed at a certain distance from the ultrasonic detection device is detected. An abnormality detecting device for an ultrasonic detector, comprising: a monitor reflector detecting means for detecting a monitor reflector; and a determining means for determining that the ultrasonic detecting device is abnormal when there is no output from the detecting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10731189U JPH0346883U (en) | 1989-09-13 | 1989-09-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10731189U JPH0346883U (en) | 1989-09-13 | 1989-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0346883U true JPH0346883U (en) | 1991-04-30 |
Family
ID=31656004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10731189U Pending JPH0346883U (en) | 1989-09-13 | 1989-09-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0346883U (en) |
-
1989
- 1989-09-13 JP JP10731189U patent/JPH0346883U/ja active Pending
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