CN201053893Y - Strong vibration adjustable tuning fork material-position measuring meter - Google Patents
Strong vibration adjustable tuning fork material-position measuring meter Download PDFInfo
- Publication number
- CN201053893Y CN201053893Y CNU2007201547228U CN200720154722U CN201053893Y CN 201053893 Y CN201053893 Y CN 201053893Y CN U2007201547228 U CNU2007201547228 U CN U2007201547228U CN 200720154722 U CN200720154722 U CN 200720154722U CN 201053893 Y CN201053893 Y CN 201053893Y
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- tuning fork
- control circuit
- foil detector
- circuit board
- main casing
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Abstract
The utility model discloses a severe-vibration adjustable-type tuning fork level meter, which comprises a main shell, a detection body that is connected to the main shell, a controlling circuit and a piezoelectric sensor, wherein, the main shell is a cylindrical aluminum alloy shell, a controlling circuit board of the controlling circuit and the piezoelectric sensor are arranged inside the main shell, the semi-cylindrical plastic shell and a rear cover of the plastic shell are arranged outside the controlling circuit board, the piezoelectric sensor is arranged below the controlling circuit board, and the detection body comprises a detection sheet and a connection body of the detection sheet, which are connected with each other. The utility model adopts the techniques such as frequency correction, F/V conversion, etc., thereby the sensitivity of the instrument is higher, the delay time of the action is much shorter, and the measurement is more correct. An oscillation power source of the controlling circuit facilitates much wider range of the voltage and much smaller power consumption. Adopting the integral rubber sealing, the protection capacity of the instrument is improved.
Description
Technical field
The utility model relates to a kind of level meter, is particularly useful for solid material level or the fixed point warning of the interior liquid level of container or the tuning fork level meter of control of various feed bins.
Background technology
The tuning fork level meter is to utilize material that the damping action of tuning fork vibration and the principle of piezoelectric effect are designed, its transducing part is made of tuning fork, have fixedly vibration frequency and amplitude vibration, when tuning fork is subjected to the material damping action, tuning fork stops vibration, drives relay by driving circuit and sends switching signal.At present, the less 0.8～1mm of tuning fork level-sensing device tuning fork amplitude, fixed amplitude, solid and liquid level gauging can not be general.The instrument degree of protection is low to be IP65, higher to using on-the-spot environmental requirement.The narrower DC 18～55V of the service area of instrument, AC 25～220V is to having relatively high expectations of power supply.Do not have on-the-spot indication, make troubles to operation and maintenance.Action time delay is 1～3S, and sensitivity is lower, can produce bigger measurement and warning error.
The utility model content
In view of this, technical problem to be solved in the utility model is to provide a kind of usable range of instrument big, but time delay short, highly sensitive solid, liquid body universal measurement level meter.
In order to solve above-mentioned technical matters, the technical scheme that the utility model adopted is: a kind of adjustable type tuning fork level meter that shakes by force, it comprises main casing, is connected in detection body, control circuit, piezoelectric sensor on this main casing, main casing is columniform Al-alloy casing, be provided with the control circuit board and the piezoelectric sensor of control circuit in the main casing, control circuit board is provided with semi-cylindrical plastic casing and plastic casing bonnet outward, and the below of control circuit board is provided with piezoelectric sensor; Survey body and comprise foil detector and foil detector connector.
The dead ahead of above-mentioned main casing is provided with the rectangle front shroud of projection, and front shroud is provided with wiring nut and connector lug, and an end is provided with circular aluminium alloy lid.
Be connected with status switch, status indicator lamp, power supply terminal and lead-out terminal on the above-mentioned control circuit board.
Above-mentioned foil detector is the stainless steel oscillating airfoil, and the foil detector connector is the stainless steel sensor body.
The rear portion cavity of above-mentioned foil detector connector is communicated with the hollow cavity at described main casing rear portion, and an end of main casing has outer six square joints or flange, and the top of this foil detector connector is provided with pipe thread.
Above-mentioned foil detector is according to the difference of measured medium or instrument range, the corresponding change of the geometric configuration of this foil detector and size.
Above-mentioned control circuit comprises that the piezoelectric crystal module connects signal acquisition module, signal acquisition module connects amplifying circuit module, amplifying circuit module connection frequency module, frequency module connection drive circuit module and F/V modular converter, the F/V modular converter connects controlling output circuit, and drive circuit module exports signal to the piezoelectric crystal module.
The technique effect that the utility model reaches is as follows: adopt tuning fork level meter of the present utility model, fork body amplitude is strong, reaches 8mm, can reduce the deposition of material and covers; Amplitude is adjustable 0.8～8mm continuously, has increased the usable range of instrument, can be used in solid-liquid body material level simultaneously, and can distinguish the different densities medium; The instrument adjustment is also more convenient.The on-the-spot indicating operating status of red cloudy surface, penetration power lucuriant in design is strong, is fit to the relatively poor scene of visibility and uses.The degree of protection of instrument can reach IP67, and power supply voltage range is wideer to be DC 18～60V, and AC 18～253V can be used in that mains fluctuations are big, the comparatively abominable place of site environment.Action is as short as failure of oscillation 0.5～1S time delay, and starting of oscillation 0.5～2S is highly sensitive, has greatly improved the precision of measuring and reporting to the police, and can be used in the category-A hazardous area.
Description of drawings
Fig. 1 is shake the by force blast structural representation of adjustable type tuning fork level meter of the utility model;
Fig. 2 is shake the by force electrical schematic diagram of adjustable type tuning fork level meter of the utility model.
Label declaration among the figure is as follows: 1-foil detector, 2-foil detector connector one, 3-stainless steel gasket, hexagonal holding screw in the 4-, 5-hexagon head bolt, 6-flat shim, jump ring in the 7-control circuit board, 8-, 9-foil detector connector two, 10-O-ring seal one, the 11-connector lug, 12-front shroud, 13-hexagon socket head cap screw, the 15-plastic casing, 16-plastic casing bonnet, 17-thru-bolt, 18-crosshead solidus bolt, 19-O-ring seal two, cover housing behind the 20-, 21-external distance tooth M4 pad 22-elastomeric pad, 23-Phillips head bolts, 24-wiring blanking cover, 25-wiring nut.
Embodiment
As shown in Figure 1 and Figure 2, the utility model adjustable type tuning fork level meter that shakes by force, comprise main casing, survey body, control circuit board 7, piezoelectric sensor, wherein, main casing is columniform Al-alloy casing, be provided with control circuit board 7 and piezoelectric sensor in the main casing, be provided with semi-cylindrical plastic casing 15 and plastic casing bonnet 16 outside the control circuit board 7, the cavity of plastic casing 15 and plastic casing bonnet 16 are bolted in one by four hexagon socket head cap screws 13.Survey foil detector 1 and vibrative foil detector connector 1 that body comprises two oscillating airfoils with transmitting vibrations effect; the leading section of main casing is provided with the front shroud 12 of projection; front shroud 12 is fixed in one with main casing by thru-bolt 17, crosshead solidus bolt 18, O-ring seal 2 19; foil detector connector 29 plays to clamp to protect stablizes crystal inside, the effect of support and connection body 1.Interior jump ring 8, O-ring seal 1 are fixed in the place that front shroud 12 and foil detector connector 29 are connected.Front shroud 12 is provided with wiring nut 25 and connector lug 11.The rearward end of foil detector connector 1 connects front shroud 12 leading sections of main casing, by hexagon head bolt 5, flat shim 6 fixedly ceramic crystal play the effect that compresses and debug.External distance tooth M4 pad 21 is put in the screw hole, next puts elastomeric pad 22 again, and then tightens Phillips head bolts 23.Wiring blanking cover 24, wiring nut 25 are put into the right hole and the left hole of front shroud 12 respectively.
Two foil detectors 1 of inductor are fixed on front portion two forks body of foil detector connector 1 by interior hexagonal holding screw 4, stainless steel gasket 3, and the rear portion cavity of foil detector connector 1 is connected with the cavity of main casing hollow.Control circuit board 7 is arranged at main casing body cavity bottom, circular aluminium alloy lid can cover control circuit board 7 with and on electronic devices and components.Piezoelectric sensor is connected with control circuit board 7 by lead, is connected with components and parts such as status switch, status indicator lamp, power supply terminal and lead-out terminal on the control circuit board 7.The side of main casing is provided with the wire hole that is connected with the cavity of its hollow, and the port of control circuit board 7 is connected with the material level control desk by the lead that passes wire hole.The cavity of main casing adopts the rear portion of whole glue envelope main casing also can be provided with outer six square joints or flange, and the top periphery of foil detector connector 1 has R11/2 " pipe thread, be used for the installation tuning fork level meter on equipment under test.
Principle of work of the present utility model is: under the acting in conjunction of control circuit and piezoelectric sensor, two oscillating airfoil roots generation vibrations by the foil detector 1 that is positioned at inductor cause the resonance of two oscillating airfoils; When material blocks oscillating airfoil, vibration will weaken, thereby the Oscillation Amplitude that causes oscillating airfoil changes, the variation of electric capacity is sensed and is produced in this variation by piezoelectric sensor, the variation of this electric capacity has been carried out signals collecting to the variation of electric capacity by the piezoelectric crystal on the control circuit board, amplify and frequency correction through amplifying circuit and frequency standard unit then, carry out the F/V converting unit then and carry out conversion of signals, at last by control output unit output switching value signal or analog signals.
The sympathetic response effect of comprehensively having considered resonant cavity from Principles of Acoustics of the present utility model, different different with instrument range according to measured medium as size design of the foil detector connector 1 of the size of the oscillating airfoil of foil detector 1 and start point, inductor etc., foil detector 1, its geometric configuration and size are all different.The material of the foil detector connector 1 of the oscillating airfoil of foil detector 1 and inductor all adopts the 304# stainless steel of hard and soft appropriateness.Because the circuit that is provided with on the PCB circuit board is: after signal acquisition module is carried out vibration signal and filtering, the amplifying circuit module is amplified signal, carry out frequency correction and signal feedback by the frequency standard module again, signal feedback is carried out the electric power amplification to driving circuit to output on the piezoelectric crystal, electric crystal produces vibration and the moving bolt of vibration measuring, and export to the F/V modular converter and carry out voltage to frequency conversion, and then carry out voltage ratio through the controlling output circuit module and provide output signal half-open off status.
Adopt the adjustable type tuning fork level meter that shakes by force of the present utility model, the piezoelectric crystal correlation parameter all can be adjusted as fixed capacity, piezoelectric constant and natural frequency etc.Unique F/V modular converter design has guaranteed that instrument has short action time delay.The oscillation power of control circuit adopts the advanced power supply design concept of Germany to design, and the voltage range that power circuit is suitable for is wideer, and power consumption is littler.Instrument adopts whole glue envelope, has improved the protective capacities of instrument.At the defective that traditional tuning fork level-sensing device exists, the utility model has been done a large amount of improvement and innovation in the design of the selecting for use of starting material and components and parts, physical construction and circuit, every performance index of instrument all are greatly improved.The amplitude of foil detector reaches 8mm by force, can reduce the deposition of material and covers, and amplitude is adjustable 0.8～8mm continuously, has increased the usable range of instrument, can be used in solid-liquid body material level simultaneously, and can distinguish the different densities medium, and the instrument adjustment is also more convenient.The degree of protection of instrument reaches IP67, power supply voltage range DC 18～60V; AC 18～253V can be used in that mains fluctuations are big, the comparatively abominable place of site environment.Action is short time delay, failure of oscillation 0.5～1S time delay; Starting of oscillation 0.5～2S time delay, highly sensitive, greatly improved the precision of measuring and reporting to the police, the on-the-spot indicating operating status of red cloudy surface, penetration power lucuriant in design is strong, is fit to the relatively poor scene of visibility and uses.
The above is preferred embodiment of the present utility model only, is not to be used to limit protection domain of the present utility model.
Claims (7)
1. adjustable type tuning fork level meter that shakes by force, it comprises main casing, is connected in detection body, control circuit, piezoelectric sensor on this main casing, it is characterized in that, described main casing is columniform Al-alloy casing, be provided with the control circuit board and the piezoelectric sensor of control circuit in the main casing, control circuit board is provided with semi-cylindrical plastic casing and plastic casing bonnet outward, and the below of control circuit board is provided with piezoelectric sensor; Described detection body comprises foil detector and foil detector connector.
2. the adjustable type tuning fork level meter that shakes by force as claimed in claim 1 is characterized in that, the dead ahead of described main casing is provided with the rectangle front shroud of projection, and front shroud is provided with wiring nut and connector lug, and an end is provided with circular aluminium alloy lid.
3. the adjustable type tuning fork level meter that shakes by force according to claim 1 is characterized in that, is connected with status switch, status indicator lamp, power supply terminal and lead-out terminal on the described control circuit board.
4. according to claim 1, the 2 or 3 described adjustable type tuning fork level meters that shake by force, it is characterized in that described foil detector is the stainless steel oscillating airfoil, the foil detector connector is the stainless steel sensor body.
5. the adjustable type tuning fork level meter that shakes by force according to claim 4, it is characterized in that, the rear portion cavity of described foil detector connector is communicated with the hollow cavity at described main casing rear portion, and an end of main casing has outer six square joints or flange, and the top of this foil detector connector is provided with pipe thread.
6. the adjustable type tuning fork level meter that shakes by force according to claim 5 is characterized in that, described foil detector is according to the difference of measured medium or instrument range, the corresponding change of the geometric configuration of described foil detector and size.
7. the adjustable type tuning fork level meter that shakes by force according to claim 1, it is characterized in that, described control circuit comprises that the piezoelectric crystal module connects signal acquisition module, signal acquisition module connects amplifying circuit module, amplifying circuit module connection frequency module, frequency module connection drive circuit module and F/V modular converter, the F/V modular converter connects controlling output circuit, and drive circuit module exports signal to the piezoelectric crystal module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201547228U CN201053893Y (en) | 2007-05-14 | 2007-05-14 | Strong vibration adjustable tuning fork material-position measuring meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201547228U CN201053893Y (en) | 2007-05-14 | 2007-05-14 | Strong vibration adjustable tuning fork material-position measuring meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201053893Y true CN201053893Y (en) | 2008-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201547228U Expired - Fee Related CN201053893Y (en) | 2007-05-14 | 2007-05-14 | Strong vibration adjustable tuning fork material-position measuring meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201053893Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798431A (en) * | 2012-08-30 | 2012-11-28 | 北京京仪海福尔自动化仪表有限公司 | Piezoelectric crystal oscillation and detection device |
| CN102257368B (en) * | 2008-12-19 | 2013-03-06 | 恩德莱斯和豪瑟尔两合公司 | Device for determining and/or monitoring a process variable |
| CN104006863A (en) * | 2014-05-07 | 2014-08-27 | 含山县大力精密机械有限公司 | Integrally-cast liquid level tuning fork |
| CN106092258A (en) * | 2016-08-09 | 2016-11-09 | 红塔烟草(集团)有限责任公司 | Tobacco processing line vacuum conditioner liquid level measuring system and vacuum conditioner |
| CN106840309A (en) * | 2017-04-01 | 2017-06-13 | 伊玛精密电子（苏州）有限公司 | Intelligent miniature tuning fork type level meter |
| CN110869718A (en) * | 2017-07-05 | 2020-03-06 | 沙特阿拉伯石油公司 | System and method for acoustic container volume calibration |
-
2007
- 2007-05-14 CN CNU2007201547228U patent/CN201053893Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102257368B (en) * | 2008-12-19 | 2013-03-06 | 恩德莱斯和豪瑟尔两合公司 | Device for determining and/or monitoring a process variable |
| CN102798431A (en) * | 2012-08-30 | 2012-11-28 | 北京京仪海福尔自动化仪表有限公司 | Piezoelectric crystal oscillation and detection device |
| CN104006863A (en) * | 2014-05-07 | 2014-08-27 | 含山县大力精密机械有限公司 | Integrally-cast liquid level tuning fork |
| CN106092258A (en) * | 2016-08-09 | 2016-11-09 | 红塔烟草(集团)有限责任公司 | Tobacco processing line vacuum conditioner liquid level measuring system and vacuum conditioner |
| CN106840309A (en) * | 2017-04-01 | 2017-06-13 | 伊玛精密电子（苏州）有限公司 | Intelligent miniature tuning fork type level meter |
| WO2018176579A1 (en) * | 2017-04-01 | 2018-10-04 | 伊玛精密电子（苏州）有限公司 | Miniature intelligent tuning fork-type level gauge |
| CN110869718A (en) * | 2017-07-05 | 2020-03-06 | 沙特阿拉伯石油公司 | System and method for acoustic container volume calibration |
| CN110869718B (en) * | 2017-07-05 | 2021-11-02 | 沙特阿拉伯石油公司 | System and method for volume calibration of acoustic vessels |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: IMAM PRECISION ELECTRONICS (SUZHOU) CO. Free format text: FORMER OWNER: RUIDA ELECTRONIC CO., LTD. Effective date: 20081010 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081010 Address after: No. 566, Yang Cheng Road, Xiangcheng District, Jiangsu, Suzhou 215133, China Patentee after: Ema Electronics Ltd. Address before: Taiwan Taipei County China Sijhih city Corelle 31-1 169 Lane Street No. 2 Building 3, zip code: Patentee before: Ruida Electronics Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080430 Termination date: 20100514 |