CN2122380U - Probe of acoustic charge level instrument - Google Patents
Probe of acoustic charge level instrument Download PDFInfo
- Publication number
- CN2122380U CN2122380U CN 92215372 CN92215372U CN2122380U CN 2122380 U CN2122380 U CN 2122380U CN 92215372 CN92215372 CN 92215372 CN 92215372 U CN92215372 U CN 92215372U CN 2122380 U CN2122380 U CN 2122380U
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- CN
- China
- Prior art keywords
- probe
- material position
- position meter
- ultrasonic material
- acoustic
- 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.)
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- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The utility model relates to a probe of an ultrasonic material position meter, belonging to the probe of the material position meter, which utilizes the acoustic wave to measure the distance and especially measure the storage capacity. The probe of an ultrasonic material position meter is mainly composed of an electrodynamic loudspeaker, a microphone and a reflex housing. The probe of an ultrasonic material position meter has the advantages of high electroacoustic conversion efficiency, small beam open-angle, small measuring blind zone, etc. The probe of an ultrasonic material position meter is suitable for the environment with big man-made noise. The probe of an ultrasonic material position meter has the advantages of convenient fabrication, low cost, and is matched with the electronic measurement component, and can be used for the material position measurement of the storehouse storing liquids, granularity materials or powdery materials.
Description
The utility model belongs to the reflection that utilizes sound wave and measures the acoustic transceiver device (promptly claim probe) of distance in particular for measuring the level-sensing device of reserves in the reservoir vessel.
The existing level-sensing device that utilizes the sound ranging principle to make, its acoustic transceiver device generally adopts piezoelectric ceramic piece to be made, the frequency range broad that it is suitable for, but have some shortcomings: the electroacoustic-acoustic-electric conversion efficiency as it is lower; The wave beam angle of release is big (being generally 7 °); And along with the raising of piezoelectric ceramics acoustic emission power, its reverb increases, and makes and measures the blind area increase, and simultaneously, cost of manufacture is quite high.
The purpose of this utility model is: utilize general known D.sp. and condenser microphone, make a kind of efficiently, its wave beam angle of release is little and measure the little sound level-sensing device probe in blind area.
The utility model is achieved in that it mainly is made of an acoustic emission D.sp., a sound reception condenser microphone and a reflecting cover of paraboloid, D.sp. and electric capacity are transaudient together affixed, be installed on the focal plane of reflecting cover of paraboloid, the axial length of reflecting cover of paraboloid is at least 8-10 times of its focus diameter of section.
Reflex housing can adopt the bigger cast aluminium of sound reflection coefficient, plastic or other material to make.
Detailed structure of the present utility model gives detailed description by the embodiment accompanying drawing that provides:
Fig. 1 is the utility model structure longitudinal sectional drawing.
Among the figure: 1-dynamic loudspeaker, 2-condenser microphone, 3-loudspeaker support, 4-reflecting cover of paraboloid.Transverse cross-sectional view is a circle.
The higher non-directive moving-coil type high frequency dynamic loudspeaker of electro-acoustic conversion efficiency is adopted in acoustic emission, and non-directive condenser microphone such as the Electret condenser microphone that sensitivity is higher and volume is again little adopted in sound reception.With the carriage center place of microphone viscose glue at tweeter, both are installed in the place, focal plane of a parabolic acoustic reflection shell together, the diameter of section size that parabolic reflector covers on the place, focal plane should equate that the axial length of reflecting cover of paraboloid is at least 8-10 times of its focus place diameter of section with the caliber size of loudspeaker.
The utility model adopts the effect of reflecting cover of paraboloid to be: non-direction acoustic emission and sound reception are focused on, acoustic energy is concentrated, as flashlight beam, make sound wave run into tested interface, its reflected sound strengthens, and with the signal to noise ratio (S/N ratio) that raising detects, improves and detects performance.
High frequency dynamic loudspeaker among the utility model embodiment adopts pure titanium film ball to rise band loudspeaker, and it is condenser microphone that acoustic receiver adopts Electret condenser microphone, and reflex housing is made with cast aluminium, and the acoustic emission frequency of operation is 14KHz.
Adopt different dynamic loudspeakers can obtain different acoustic emission frequency of operation and acoustical power, be generally 7KHz-20KHz.
The utility model has the advantage of: 1. adopting dynamic speaker is the acoustic emission device, its electro-acoustic conversion efficiency height, simultaneously, adopt the higher condenser microphone of reception sensitivity to receive reflective sound wave, its optoelectronic conversion ratio is also high, has used again the sound reflecting cover in addition, make acoustic energy pass through to focus on, improved the sound reception signal to noise ratio, improved operating efficiency, level-sensing device also can be worked normally at the very big environment of man-made noise; 2. to open the angle be 4 ° to the acoustic beam of actual measurement level-sensing device, and do not have secondary lobe, and acoustic energy is concentrated; 3. owing to Yu Xiangxiao, making level-sensing device actual measurement blind area is 0.3 meter, and range can reach 50 meters, has improved the range finding distance; 4. simple for production, cheap, utilized the existing device of easily buying on the market; 5. range of application is wider, and this probe is cooperated electronic measuring part, and to liquid reserves or graininess (rice, wheat, beans etc.), the material position, warehouse of powdery (such as cement etc.) material all can be measured.
Claims (2)
1, a kind of level-sensing device probe, it is characterized in that: it is by a D.sp., one condenser microphone and a reflecting cover of paraboloid constitute, after its D.sp. and condenser microphone are affixed, be installed on the focal plane of reflecting cover of paraboloid, the axial length of reflecting cover of paraboloid is at least 8-10 times of its focus diameter of section.
2, level-sensing device probe according to claim 1, it is characterized in that: said reflecting cover of paraboloid is made by cast aluminium or plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92215372 CN2122380U (en) | 1992-04-07 | 1992-04-07 | Probe of acoustic charge level instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92215372 CN2122380U (en) | 1992-04-07 | 1992-04-07 | Probe of acoustic charge level instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2122380U true CN2122380U (en) | 1992-11-18 |
Family
ID=4959785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92215372 Withdrawn CN2122380U (en) | 1992-04-07 | 1992-04-07 | Probe of acoustic charge level instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2122380U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793548A (en) * | 2010-03-25 | 2010-08-04 | 南方电网技术研究中心 | Device and method for coherent separation of noise of equipment of direct-current convertor station |
| CN102200464A (en) * | 2010-03-26 | 2011-09-28 | Vega格里沙贝两合公司 | False echo storage in case of container noise |
-
1992
- 1992-04-07 CN CN 92215372 patent/CN2122380U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793548A (en) * | 2010-03-25 | 2010-08-04 | 南方电网技术研究中心 | Device and method for coherent separation of noise of equipment of direct-current convertor station |
| CN102200464A (en) * | 2010-03-26 | 2011-09-28 | Vega格里沙贝两合公司 | False echo storage in case of container noise |
| CN102200464B (en) * | 2010-03-26 | 2016-04-13 | Vega格里沙贝两合公司 | Interference echo in container noise stores |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |