JPS55101879A - Ultrasonic switch - Google Patents
Ultrasonic switchInfo
- Publication number
- JPS55101879A JPS55101879A JP1070379A JP1070379A JPS55101879A JP S55101879 A JPS55101879 A JP S55101879A JP 1070379 A JP1070379 A JP 1070379A JP 1070379 A JP1070379 A JP 1070379A JP S55101879 A JPS55101879 A JP S55101879A
- Authority
- JP
- Japan
- Prior art keywords
- time
- reflected wave
- floor
- period
- wave
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
- G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
- G01S15/18—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves wherein range gates are used
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
PURPOSE:To prevent malfunction due to reflected wave from the floor surface by a method wherein object to be detected is removed from the space between the ceiling and floor for a given period of time after power is on so that the traveling time of wave in the space is memorized, and at the same time detection area is defined. CONSTITUTION:When power switch for ultrasonic switch 15 is turned on, timer circuit 6 is actuated for a specified period of time, output from receiver 4 is input to memory 7, the period from ultrasonic emission to receival of reflected wave is measured, and stored as the go-and-return time t of ultrasonic wave to and from the floor. At normal operation, the time t stored in the memory 7 is read, gate controller 9 forms gate control pulse PG, which opens and closes the gate circuit 7. This allows the detector 11 to receive reflected wave that comes during a definit period t3, i.e. signal by reflected wave from the object to be detected present in the detection area. This eliminates detection output due to reflected wave from the floor, so that the switching circuit 12 works only when the object 3 is present in the detection area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1070379A JPS55101879A (en) | 1979-01-31 | 1979-01-31 | Ultrasonic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1070379A JPS55101879A (en) | 1979-01-31 | 1979-01-31 | Ultrasonic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55101879A true JPS55101879A (en) | 1980-08-04 |
Family
ID=11757647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1070379A Pending JPS55101879A (en) | 1979-01-31 | 1979-01-31 | Ultrasonic switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55101879A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63501315A (en) * | 1985-11-06 | 1988-05-19 | フオ−ミユラ システムズ リミツテツド | proximity detector |
-
1979
- 1979-01-31 JP JP1070379A patent/JPS55101879A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63501315A (en) * | 1985-11-06 | 1988-05-19 | フオ−ミユラ システムズ リミツテツド | proximity detector |
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