JPS63177779U - - Google Patents
Info
- Publication number
- JPS63177779U JPS63177779U JP6977987U JP6977987U JPS63177779U JP S63177779 U JPS63177779 U JP S63177779U JP 6977987 U JP6977987 U JP 6977987U JP 6977987 U JP6977987 U JP 6977987U JP S63177779 U JPS63177779 U JP S63177779U
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- detection
- signal
- circuit
- gate
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
第１図は本考案の一実施例による超音波スイツ
チの全体構成を示すブロツク図、第２図は送波ゲ
ート発生回路の回路構成を示す回路図、第３図は
本実施例の動作を示すタイムチヤート、第４図は
従来の超音波スイツチの主要部を示すブロツク図
、第５図はその動作を示すタイムチヤートである
。
１１……送波ゲート発生回路、１３……禁止ゲ
ート発生回路、１６……超音波振動子、１７……
検波回路、１８……比較回路、１９……信号処理
回路、２０……検知ゲート発生回路、２１，３２
……フリツプフロツプ、２２……シフトレジスタ
、２３，２５……オア回路、３１……演算増幅器
、３３……ＦＥＴ、３４……インバータ。
Fig. 1 is a block diagram showing the overall configuration of an ultrasonic switch according to an embodiment of the present invention, Fig. 2 is a circuit diagram showing the circuit structure of a transmission gate generation circuit, and Fig. 3 shows the operation of this embodiment. 4 is a block diagram showing the main parts of a conventional ultrasonic switch, and FIG. 5 is a time chart showing its operation. 11... Transmission gate generation circuit, 13... Prohibition gate generation circuit, 16... Ultrasonic transducer, 17...
Detection circuit, 18... Comparison circuit, 19... Signal processing circuit, 20... Detection gate generation circuit, 21, 32
... flip-flop, 22 ... shift register, 23, 25 ... OR circuit, 31 ... operational amplifier, 33 ... FET, 34 ... inverter.
Claims (1)
受信時間によつて所定範囲の物体を検知する超音
波スイツチであつて、 長時間及び短時間の送波ゲート信号を交互に発
生し前記超音波素子を駆動する送波ゲート発生回
路と、 前記送波ゲート信号によつて起動され超音波受
信信号の検知までの時間を定める禁止ゲート信号
を発生する禁止ゲート発生回路と、 前記超音波受信信号の検知時間を定める検知ゲ
ート信号を発生する検知ゲート発生回路と、 前記超音波素子より得られる所定閾値レベルを
越える受波信号を識別する比較回路と、 長時間及び短時間の送波の間に前記検知ゲート
発生回路の検知ゲート信号に基づいて比較出力を
保持する信号処理回路と、を具備することを特徴
とする超音波スイツチ。 (2) 前記信号処理回路は、検知ゲート信号のタ
イミングで比較出力を保持するフリツプフロツプ
と、前記フリツプフロツプの保持出力を検知ゲー
ト信号によつてシフトする２ビツトのシフトレジ
スタと、前記シフトレジスタの各出力の論理和を
とるオア回路と、有することを特徴とする実用新
案登録請求の範囲第１項記載の超音波スイツチ。[Claims for Utility Model Registration] (1) An ultrasonic switch that detects objects within a predetermined range based on the reception time of ultrasonic signals by driving an ultrasonic element intermittently, a wave transmission gate generation circuit that alternately generates wave gate signals to drive the ultrasonic element; and a prohibition circuit that generates a prohibition gate signal that is activated by the wave transmission gate signal and determines the time until detection of the ultrasonic reception signal. a gate generation circuit; a detection gate generation circuit that generates a detection gate signal that determines the detection time of the ultrasonic reception signal; a comparison circuit that identifies a reception signal that exceeds a predetermined threshold level obtained from the ultrasonic element; An ultrasonic switch comprising: a signal processing circuit that holds a comparative output based on the detection gate signal of the detection gate generation circuit during time and short-time wave transmission. (2) The signal processing circuit includes a flip-flop that holds the comparison output at the timing of the detection gate signal, a 2-bit shift register that shifts the held output of the flip-flop in accordance with the detection gate signal, and each output of the shift register. 2. The ultrasonic switch according to claim 1, further comprising: an OR circuit that calculates the logical sum of the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6977987U JPH0548143Y2 (en) | 1987-05-11 | 1987-05-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6977987U JPH0548143Y2 (en) | 1987-05-11 | 1987-05-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63177779U true JPS63177779U (en) | 1988-11-17 |
| JPH0548143Y2 JPH0548143Y2 (en) | 1993-12-20 |
Family
ID=30910816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6977987U Expired - Lifetime JPH0548143Y2 (en) | 1987-05-11 | 1987-05-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0548143Y2 (en) |
-
1987
- 1987-05-11 JP JP6977987U patent/JPH0548143Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0548143Y2 (en) | 1993-12-20 |
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