CN201269770Y - Thick film resistor type liquid level sensor - Google Patents
Thick film resistor type liquid level sensor Download PDFInfo
- Publication number
- CN201269770Y CN201269770Y CNU2008200721522U CN200820072152U CN201269770Y CN 201269770 Y CN201269770 Y CN 201269770Y CN U2008200721522 U CNU2008200721522 U CN U2008200721522U CN 200820072152 U CN200820072152 U CN 200820072152U CN 201269770 Y CN201269770 Y CN 201269770Y
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- thick
- resistance
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- film resistor
- slide plate
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Abstract
The utility model relates to a sensor device converting the liquid level into corresponding output resistance value, in particular to a thick-film resistance-type liquid level sensor which comprises a thick-film resistance board, a lever, a sliding-slab bracket, a bobber, a conductive spring, a resistance board bracket, a resistance plug wire group, sliding slabs, contacts, comb-shaped electrode regions, thick-film resistance strips, an initial resistance RO, an output end and another output end; the thick-film resistance board is provided with two groups of thick-film resistance strips with common end points and two groups of scalloped comb-shaped electrode regions which are connected with the two groups of thick-film resistance strips and arranged in an opposite and interlaced way; the sliding slabs adopt a structural form of a front group, a rear group and two sliding slab bodies in each group; contacts adopt a structural form of a front group, a rear group and two contact bodies in each group; and the four contact bodies are respectively arranged on the four sliding slab bodies. The liquid level sensor has the advantages of providing precise resistance and ensuring the normal work of the sensor in a severe vibrating liquid environment and gaseous environment.
Description
Technical field
The utility model relates to and a kind of liquid level is converted into the sensor device of corresponding resistance value output, a kind of specifically thick-film resistor formula liquid level sensor, and it is a kind of highly reliable and high-precision level sensing apparatus.
Background technology
At present, known thick-film resistor formula liquid level sensor structure is generally formed by having single test contact and being fixed on slide plate on the slide plate support, follower (float), leverage (lever, slide plate support), resistance board support, thick-film resistor plate (conductive strips that it is surperficial and coupled thick-film resistor become single group series arrangement), housing etc.When liquid level changes, follower is subjected to displacement synchronously with liquid level, driving leverage and slide plate moves, contact on the slide plate slides into the comb electrode place corresponding with liquid level simultaneously on the thick-film resistor plate, the certain resistance value of output between conductive strips common port and the contact can be reacted current level value on the thick-film resistor plate.But, a lot of liquid level sensors can only be in the pure working environment of static state steady operation, and the resistance value deviation of output is bigger.General liquid level sensor is in the liquid environment and gaseous environment of more abominable vibration, can not guarantee that all contact and thick-film resistor plate reliably contact and the less high precision resistance of output bias, causes difficulty in the real work liquid level indicating value.
Summary of the invention
Reach the shortcoming that the contact on the slide plate and thick-film resistor plate can not reliably contact in the liquid environment of abominable vibration and gaseous environment more greatly in order to overcome existing thick-film resistor formula liquid level sensor output resistance deviation, the utility model provides a kind of thick-film resistor formula liquid level sensor, this liquid level sensor can not only be exported the measurement resistance of degree of precision, can also guarantee that sensor contact can reliably contact with the thick-film resistor plate in the liquid environment of abominable vibration and gaseous environment.
The technical scheme that its technical matters that solves the utility model adopts is:
This sensor comprises the thick-film resistor plate, lever, slide plate support, float, power spring, resistance board support, resistance plug wire group, slide plate, contact, comb electrode district, thick-film resistor band, initial resistance R 0, output terminal, another output terminal.Be provided with two groups of thick-film resistor bands and two groups of coupled fan-shaped comb electrode districts of public point on the described thick-film resistor plate, two groups of relative and dislocation arrangements in comb electrode district; The version of two groups, every group two slide plate bodies before and after described slide plate adopts, the version of two groups, every group two contact bodies before and after contact adopts, four contact bodies be separately positioned on four slide plate bodies above.
Described float is fixed on the lever, lever and slide plate and the slide plate support composition leverage that is fixed up, an output terminal of slide plate and thick-film resistor plate links together with welding manner by power spring, in the resistance board support, output terminal, initial resistance, two groups of thick-film resistors, two groups of comb electrodes, slide plate, power spring and another output terminal are electrically connected in proper order, change along with liquid level, it is center rotation with the axle of slide plate support that float can drive leverage, and two groups of contacts of the slide plate that contacts with the thick-film resistor plate can be the center rotation with this axle also, two groups of contacts contact with two groups of comb electrodes of thick-film resistor plate respectively in rotary course all the time, along with the change of position, the sensor output terminal can be exported corresponding resistance.
The beneficial effects of the utility model are, both can provide accurate resistance, can guarantee sensor operate as normal in the liquid environment of abominable vibration and gaseous environment again.
Description of drawings
Fig. 1 is a thick-film resistor formula liquid level sensor one-piece construction synoptic diagram
Fig. 2 is that the utility model slide plate contact contacts partial enlarged view with the circuit board comb electrode
Fig. 3 is the utility model thick-film resistor plate portion structure for amplifying synoptic diagram
Fig. 4 is the utility model slide plate and contact part structure for amplifying synoptic diagram
Fig. 5,6,7 is three kinds of status circuit schematic diagrams of utility model.
Embodiment
By illustrated in figures 1 and 2:
This sensor comprises thick-film resistor plate 1, lever 2, slide plate support 3, float 4, power spring 5, resistance board support 6, resistance plug wire group 7, slide plate 8, contact 9, comb electrode district 10, thick-film resistor band 11, initial resistance R 012, output terminal 13, another output terminal 14.
Be provided with the two groups of thick-film resistor bands 11 and coupled 10, two groups of comb electrode districts, two groups of fan-shaped comb electrode districts, the 10 relative and dislocation arrangements of public point on the described thick-film resistor plate 1.
By Fig. 3 and shown in Figure 4: the version of two groups, every group two slide plate bodies 15 before and after described slide plate 8 adopts, the version of two groups, every group two contact bodies 16 before and after contact 9 adopts, four contact bodies 16 be separately positioned on four slide plate bodies 15 above.
Described float 4 is fixed on the lever 2, lever 2 and slide plate 8 and the slide plate support 3 composition leverage that is fixed up, the output terminal 14 of slide plate 8 and thick-film resistor plate 1 links together with welding manner by power spring 5, change along with liquid level, float 4 meeting drive leverages are the center rotation with the axle of slide plate support 3, and two groups of contacts 9 of the slide plate 8 that contacts with thick-film resistor plate 1 can be the center rotation with this axle also, two groups of contacts 9 contact with two groups of comb electrodes 10 of thick-film resistor plate respectively in rotary course all the time, along with the change of position, resistance plug wire group 7 can the corresponding resistance of output.
When two groups of contacts on the slide plate contact with two groups of comb electrodes respectively, will measure two resistance values, each resistance measurement is all identical with traditional measurement method, but, two contacts on the slide plate connect because being short circuits, therefore the resistance of exporting between public point and the slide plate is the parallel connection value of two resistance values measuring, can reduce the deviation of single channel resistance after the resistance parallel connection, improve measuring accuracy;
Contact and slide plate can adopt elasticity silver-bearing copper or the moulding of copper-nickel alloy integrated punching preferably, just have 4 contact bodies to slide on two groups of comb electrodes of thick-film resistor plate on such slide plate, to reach the purpose that slide plate contact and thick-film resistor plate comb electrode reliably contact.
At Fig. 5,6, in 7, output resistance Rout one end is connected with slide plate, the other end links to each other with an end of initial resistance R 0, the initiating terminal of the other end of initial resistance R 0 and two groups of thick-film resistor bands links together, wherein one group of thick-film resistor band is by n thick-film resistor R11, R12, R13, R1x, R1 (x+1), R1n is composed in series, another group thick-film resistor band is by n thick-film resistor R21, R22, R23, R2x, R2 (x+1), R2n is composed in series, each thick-film resistor both sides all has lead to be connected with comb electrode, two groups of comb electrodes are fan-shaped and evenly distribute with one heart, two groups of relative and dislocation arrangements of comb electrode, in the slide plate moving process, two pairs of contacts on the slide plate contact with two groups of comb electrodes respectively, the slide plate end is measured two groups of resistances, connect common output resistance Rout after two groups of resistance parallel connections again with initial resistance R 0; Two pairs of contacts and two groups of comb electrodes on the slide plate form 3 kinds of contact conditions, and the computing method of the output resistance Rout of every kind of state are as follows:
Fig. 5: state 1:R1=R11+R12+R13+ ... + R1x, R2=R21+R22+R23+ ... + R2x, R close=R1 * R2/ (R1+R2)
Rout=R0+R closes
Fig. 6: state 2:R1=R11+R12+R13+ ... + R1x, R2=R21+R22+R23+ ... + R2x, R close=R1 * R2/ (R1+R2)
Rout=R0+R closes
Fig. 7: state 3:R1=R11+R12+R13+ ... + R1 (x+1), R2=R21+R22+R23+ ... + R2x, R close=R1 * R2/ (R1+R2)
Rout=R0+R closes.
Claims (1)
1, a kind of thick-film resistor formula liquid level sensor, this sensor comprises thick-film resistor plate (1), lever (2), slide plate support (3), float (4), power spring (5), resistance board support (6), resistance plug wire group (7), slide plate (8), contact (9), comb electrode district (10), thick-film resistor band (11), initial resistance R 0 (12), output terminal (13), another output terminal (14) is characterized in that: be provided with two groups of thick-film resistor bands (11) of public point and coupled two groups of fan-shaped comb electrode districts (10) on the described thick-film resistor plate (1), the relative and dislocation arrangement in two groups of comb electrode districts (10); The version of two groups, every group two slide plate bodies (15) before and after described slide plate (8) adopts, the version of two groups, every group two contact bodies (16) before and after contact (9) adopts, four contact bodies (16) be separately positioned on four slide plate bodies (15) above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200721522U CN201269770Y (en) | 2008-07-21 | 2008-07-21 | Thick film resistor type liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200721522U CN201269770Y (en) | 2008-07-21 | 2008-07-21 | Thick film resistor type liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269770Y true CN201269770Y (en) | 2009-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200721522U Expired - Fee Related CN201269770Y (en) | 2008-07-21 | 2008-07-21 | Thick film resistor type liquid level sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN201269770Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011513A (en) * | 2011-12-19 | 2014-08-27 | 大陆汽车有限责任公司 | Filling level indicator |
| CN106840317A (en) * | 2017-02-27 | 2017-06-13 | 天津普洛仙科技有限公司 | Water process liquid level detection device |
| CN107976231A (en) * | 2017-11-23 | 2018-05-01 | 安徽江淮汽车集团股份有限公司 | A kind of fuel pump sensor |
| CN110931189A (en) * | 2019-12-16 | 2020-03-27 | 武汉驰电科技有限公司 | Ceramic resistance card and automatic positioning resistance adjusting method |
| CN111103085A (en) * | 2019-12-16 | 2020-05-05 | 武汉驰电科技有限公司 | Mechanical pressure sensor |
| CN111128501A (en) * | 2019-12-16 | 2020-05-08 | 武汉驰电科技有限公司 | Off-line laser resistance trimming machine and resistance trimming method |
-
2008
- 2008-07-21 CN CNU2008200721522U patent/CN201269770Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011513A (en) * | 2011-12-19 | 2014-08-27 | 大陆汽车有限责任公司 | Filling level indicator |
| US9766110B2 (en) | 2011-12-19 | 2017-09-19 | Continental Automotive Gmbh | Filling level indicator |
| CN104011513B (en) * | 2011-12-19 | 2017-10-27 | 大陆汽车有限责任公司 | Thing position indicator |
| CN106840317A (en) * | 2017-02-27 | 2017-06-13 | 天津普洛仙科技有限公司 | Water process liquid level detection device |
| CN107976231A (en) * | 2017-11-23 | 2018-05-01 | 安徽江淮汽车集团股份有限公司 | A kind of fuel pump sensor |
| CN110931189A (en) * | 2019-12-16 | 2020-03-27 | 武汉驰电科技有限公司 | Ceramic resistance card and automatic positioning resistance adjusting method |
| CN111103085A (en) * | 2019-12-16 | 2020-05-05 | 武汉驰电科技有限公司 | Mechanical pressure sensor |
| CN111128501A (en) * | 2019-12-16 | 2020-05-08 | 武汉驰电科技有限公司 | Off-line laser resistance trimming machine and resistance trimming method |
| CN111103085B (en) * | 2019-12-16 | 2021-08-06 | 武汉驰电科技有限公司 | Mechanical pressure sensor |
| CN110931189B (en) * | 2019-12-16 | 2021-09-24 | 武汉驰电科技有限公司 | Ceramic resistance card and automatic positioning resistance adjusting method |
| CN111128501B (en) * | 2019-12-16 | 2021-09-24 | 武汉驰电科技有限公司 | Laser resistance adjusting method |
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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: JILIN DEKE ELECTRONIC CO., LTD. Free format text: FORMER OWNER: SIPING DEJIA ELECTRONIC METER CO., LTD. Effective date: 20140128 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140128 Address after: 136001, Siping East Street, Siping City, Jilin Province, No. 1276 Patentee after: JILIN DEKE ELECTRONIC CO., LTD. Address before: 136001, 1276, Ping Tung Street, Siping City, Jilin Province Patentee before: Siping Dejia Electronic Meter Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20150721 |
|
| EXPY | Termination of patent right or utility model |