CN202793427U - Position detection sensor - Google Patents
Position detection sensor Download PDFInfo
- Publication number
- CN202793427U CN202793427U CN 201220477671 CN201220477671U CN202793427U CN 202793427 U CN202793427 U CN 202793427U CN 201220477671 CN201220477671 CN 201220477671 CN 201220477671 U CN201220477671 U CN 201220477671U CN 202793427 U CN202793427 U CN 202793427U
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- coil
- cavity
- detection sensor
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- metallic object
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Abstract
The utility model relates to a detection sensor, and provides a position detection sensor which is mainly used for automatically powering off small household appliances and has the advantages of high reliability, low manufacturing cost and the like. The position detection sensor comprises a coil framework, a rolling metal body, a first coil, a second coil and a rear cover, the rolling metal body is arranged in a cavity of the coil framework and can roll back and forth in the cavity, the first coil and the second coil are wound in two wire slots of the coil framework respectively and are connected to three metal pins respectively, the second metal pin serves as a common end of the first coil and the second coil, the first metal pin and the third metal pin serve as signal output ends of the first coil and the second coil, and the rear cover is arranged on the cavity in the coil framework.
Description
Technical field
The utility model relates to a kind of detecting sensor, particularly relates to a kind of position-detection sensor for the small household appliances auto-breaking.
Background technology
At present, the sensor that detects for the small household appliances auto-breaking mainly contains touch sensor and electro-optical pickoff.Touch sensor mainly is comprised of rolling Metal Ball and switch contact, is switched on or switched off two contacts by Metal Ball.The sensor of this structure exists the problem of on-state rate, because the conductive effect difference of used Metal Ball and contact causes the sensor Accuracy of Judgement to exist relatively large deviation.Electro-optical pickoff mainly is comprised of pipe, cavity, occulter with receiving photoemission, need to be to power valve certain electric current in addition during use, and the movement position by occulter changes to realize pass through and block of light between pipe changed thereby realize exporting.But this electro-optical pickoff cost is higher, and power consumption is larger.
Summary of the invention
The purpose of this utility model is to provide a kind of small household appliance auto-breaking that is mainly used in, the position-detection sensor with characteristics such as reliability height, low cost of manufactures.
The utility model is provided with coil rack, rolling metallic object, the 1st coil, the 2nd coil and bonnet; Described rolling metallic object is located in the cavity of coil rack, and the rolling metallic object can roll in cavity back and forth; Described the 1st coil and the 2nd coil are respectively in two wire casings of coil rack, the 1st coil and the 2nd coil are connected respectively on 3 metal pins, the 2nd metal pins is as the common port of the 1st coil and the 2nd coil, and the 1st metal pins and the 3rd metal pins are respectively as the signal output part of the 1st coil and the 2nd coil; Described bonnet is located on the interior cavity of coil rack.
Cavity in the described coil rack can adopt tubaeform cavity.
Described rolling metallic object can adopt metal ball body, metal cartridge or sheet metal etc.
Described rolling metallic object and the 1st coil and the 2nd coil form 2 variable inductances.Which inductance position the rolling metallic object moves to, and it is large that the sense value of that inductance becomes.When the tubaeform cavity of rolling metallic object in coil rack rolls, two inductance value are changed; And inductance cooperates the variation of two signal reflection inductance value that produce with external circuit; Chip IC is to the processing such as maintenance, comparison and filtering of amplifying, sample of above-mentioned two signals, thus the variation of judgment object state.
Compare with existing sensor, the utlity model has following advantage:
1. the utility model is provided with 2 coils, adopt in the coil rack the rolling metallic object back and forth two inductance of scrolling realization increase and reduce.Do not exist to electrically contact the conducting requirement, do not need the cavity inner wall of rolling metallic object and coil rack is carried out gold-plated processing.
2. judge the variation of position because the utility model is the relative size that detects two variable inductance values, so have the characteristics such as anti-interference is good, sensitivity is adjustable, power consumption is little.
Description of drawings
Fig. 1 is the axial arrangement synoptic diagram of the utility model embodiment.
Fig. 2 is the schematic equivalent circuit of the utility model embodiment.
Fig. 3 is the application circuit block diagram of the utility model embodiment.
Embodiment
Referring to Fig. 1～3, the utility model embodiment is provided with coil rack 1, rolling metallic object 2, the 1st coil, the 2nd coil and bonnet 5; Cavity in the described coil rack 1 is tubaeform cavity 11, and rolling metallic object 2 is located in the tubaeform cavity 11, and rolling metallic object 2 can roll in tubaeform cavity 11 back and forth; Described the 1st coil is in the 1st wire casing 31 of coil rack 1, described the 2nd coil is in the 2nd wire casing 32 of coil rack 1, the 1st coil and the 2nd coil are connected respectively on 3 metal pins, the 2nd metal pins 42 is as the common port of the 1st coil and the 2nd coil, and the 1st metal pins 41 and the 3rd metal pins 43 are respectively as the signal output part of the 1st coil and the 2nd coil; Described bonnet 5 is located on the tubaeform cavity 11 in the coil rack 1.
Described rolling metallic object 2 and the 1st coil and the 2nd coil form 2 variable inductance L1, L2.Which inductance position rolling metallic object 2 moves to, and it is large that the sense value of that inductance becomes.When the tubaeform cavity 11 of rolling metallic object 2 in coil rack 1 rolls, two inductance value are changed; And inductance cooperates the variation of two signal reflection inductance value that produce with external circuit; Chip IC is to the processing such as maintenance, comparison and filtering of amplifying, sample of above-mentioned two signals, thus the variation of judgment object state.
Below provide principle of work of the present utility model: mainly by the inductance L 1 of 2 coil coileds, L2 and 1 rolling metallic object form the utility model; 2 inductance are connected with 1 common port COM, 2 output terminal V1, V2; The rolling metallic object makes L1 in the variation of the tubaeform cavity 11 interior positions of coil rack, and the inductance value of L2 changes; Utilize 2 variable inductances to cooperate with external chip IC and produce 2 detection signal V1, V2, this detection signal V1, V2 directly reflect the size of inductance value; Chip IC is to the processing such as maintenance, comparison and filtering of amplifying, sample of above-mentioned two signals, thus the variation of judgment object state.In Fig. 3, mark A is the utility model, and VDD connects power supply, and OUT is output terminal.
Claims (3)
1. position-detection sensor is characterized in that being provided with coil rack, rolling metallic object, the 1st coil, the 2nd coil and bonnet; Described rolling metallic object is located in the cavity of coil rack, and the rolling metallic object can roll in cavity back and forth; Described the 1st coil and the 2nd coil are respectively in two wire casings of coil rack, the 1st coil and the 2nd coil are connected respectively on 3 metal pins, the 2nd metal pins is as the common port of the 1st coil and the 2nd coil, and the 1st metal pins and the 3rd metal pins are respectively as the signal output part of the 1st coil and the 2nd coil; Described bonnet is located on the interior cavity of coil rack.
2. as claimed in claim position-detection sensor is characterized in that the cavity in the described coil rack adopts tubaeform cavity.
3. as claimed in claim position-detection sensor is characterized in that described rolling metallic object adopts metal ball body, metal cartridge or sheet metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220477671 CN202793427U (en) | 2012-09-18 | 2012-09-18 | Position detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220477671 CN202793427U (en) | 2012-09-18 | 2012-09-18 | Position detection sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202793427U true CN202793427U (en) | 2013-03-13 |
Family
ID=47820673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220477671 Expired - Fee Related CN202793427U (en) | 2012-09-18 | 2012-09-18 | Position detection sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202793427U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837929A (en) * | 2015-12-01 | 2017-06-13 | Smc株式会社 | Position-detection sensor |
-
2012
- 2012-09-18 CN CN 201220477671 patent/CN202793427U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837929A (en) * | 2015-12-01 | 2017-06-13 | Smc株式会社 | Position-detection sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20190918 |