JPS56143917A - Ultrasonic level gage - Google Patents
Ultrasonic level gageInfo
- Publication number
- JPS56143917A JPS56143917A JP4706380A JP4706380A JPS56143917A JP S56143917 A JPS56143917 A JP S56143917A JP 4706380 A JP4706380 A JP 4706380A JP 4706380 A JP4706380 A JP 4706380A JP S56143917 A JPS56143917 A JP S56143917A
- Authority
- JP
- Japan
- Prior art keywords
- output
- reflected waves
- amplifier
- gate
- measured
- 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
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
PURPOSE:To prevent malfunction owing to the reflected waves from objects other than the object to be measured and measure distance accurately by provding a blind anone generating circuit for the purpose of eliminating unnecessary reflected waves. CONSTITUTION:After the reflected waves of the ultrasonic waves from the object to be measured are received in a radio receiver 16b, they are supplied via an amplifier 17 to a measuring circuit 15. This amplifier 17 is controlled by the output of a gate 18. Namely, when the output of the gate 18 is of a low level, the output of the amplifier 17 is interrupted. Thereupon, when there are unnecessary reflected waves by projecting etc., a blind zone generating circuit 14 is provided so that the output of the gate 18 is kept at low level for a prescribed time, whereby the output of the amplifier 17 is interrupted. Hence, there is no input to the measuring circuit 15 during this time and therefore the occurrence of malfunction is obviated. Since the effect of the unnecessary reflected waves is not exerted upon the measuring circuit 15, the accurate distance is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4706380A JPS56143917A (en) | 1980-04-10 | 1980-04-10 | Ultrasonic level gage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4706380A JPS56143917A (en) | 1980-04-10 | 1980-04-10 | Ultrasonic level gage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56143917A true JPS56143917A (en) | 1981-11-10 |
Family
ID=12764690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4706380A Pending JPS56143917A (en) | 1980-04-10 | 1980-04-10 | Ultrasonic level gage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56143917A (en) |
-
1980
- 1980-04-10 JP JP4706380A patent/JPS56143917A/en active Pending
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