CN2526779Y - Sensor for digital display callipers - Google Patents
Sensor for digital display callipers Download PDFInfo
- Publication number
- CN2526779Y CN2526779Y CN 02226160 CN02226160U CN2526779Y CN 2526779 Y CN2526779 Y CN 2526779Y CN 02226160 CN02226160 CN 02226160 CN 02226160 U CN02226160 U CN 02226160U CN 2526779 Y CN2526779 Y CN 2526779Y
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- China
- Prior art keywords
- electrode
- pitch
- emitting electrode
- emitting
- wiring board
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- Expired - Fee Related
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Abstract
The utility model relates to a capacitive gate sensor for a digital display caliber rule, and adjacent emitting electrodes in the same pitch T are respectively and alternately arranged at both sides of a receiving electrode. The arrangement sequences of the emitting electrodes in all pitches in one group comprising NT (N is a whole number.) pitches are identical, and the arrangement sequences of the emitting electrodes in every other one group are stagger. The contiguous emitting electrodes in 2N (N is a whole number.) groups are arranged in a measurement direction at intervals, and the gaps between the contiguous emitting electrodes in each pitch T, among pitches and among groups in the measurement direction are the same. The arrangement method can increase the measuring signal strength, so that the measurement sensitivity is improved, and the manufacture difficulty and the cost can not be increased.
Description
Technical field
The utility model relates to the capacitor grid transducer that capacitive transducer, particularly digital display calliper that a kind of digital display appliance of measuring length uses are used.
Background technology
Capacitor grid transducer is applied to technology on the digital display calliper two kinds on phase demodulating type and amplitude discrimination type.The structure of existing phase demodulating sensor is the emitting electrodes that contain 8 emission unlike signals on its moving grid wiring board a pitch, and each emitting electrode is arranged in order by certain order.NT group emitting electrode is arranged on the moving grid wiring board, and the gap of adjacent transmission electrode is s, is sidelong at one of emitting electrode and puts a receiving electrode.According to above-mentioned spread pattern, if improve its resolution and precision and dwindle the spacing t of emitting electrode, then adjacent transmission gaps between electrodes s will be very little, and its technology difficulty is conspicuous.And, therefore can cause reflecting electrode signal when crossing over two emitting electrodes discontinuous, thereby influence the precision of sensor owing to have gap s between the adjacent transmission electrode.A kind of modified capacitive displacement transducer is disclosed in ZL982507747, the staggered mode in emitting electrode zero stand-off has been proposed, its formation is to be staggered respectively in the both sides of receiving electrode comprising the emitting electrode of launching unlike signal in pitch T on the moving grid wiring board, with it in another pitch T of several pitches T, putting in order of its emitting electrode is staggered with putting in order of above-mentioned emitting electrode, and the adjacent transmission electrode is zero along the gap of direction of measurement.Owing to adopted the emitting electrode staggered pattern, made moving grid wiring board symmetry along direction of measurement when assembling require to reduce greatly, thereby lowered assembly difficulty.Owing to adopted the zero stand-off arrangement, can improve measuring accuracy again.But therefore this arrangement mode at least one pitch T of must being separated by before and after the emitting electrode upper-lower position is put upside down has reduced the quantity of emitting electrode, thereby has weakened the intensity that transmits and receives signal.Because the restriction of physical dimension, the emitting electrode quantity that can arrange on a moving grid wiring board is limited, the requirement that will reduce measuring accuracy and improve the electrode manufacturing accuracy after emitting electrode quantity reduces.Simultaneously, can not reach when measuring needed intensity when transmitting, the fit-up gap that can only take to reduce between moving grid wiring board and fixed grid wiring board strengthens induced signal, the measurer that this disposal route is applied to the approximate zero fit-up gap is feasible, and the measurer of big fit-up gap is arranged between moving grid and the fixed grid is unpractical but be used in such the needing of digital display calliper.
Summary of the invention
The purpose of this utility model is to propose a kind ofly can increase transmit signal strength, improves and measures sensitivity, does not increase the capacitor grid transducer that the digital display calliper of manufacture difficulty is used simultaneously again.
Technical solution of the present utility model is: the capacitor grid transducer that a kind of digital display calliper is used, comprise moving grid wiring board that is located on the complementary scale and the fixed grid wiring board that is located on the main scale, above-mentioned moving grid wiring board is provided with the emitting electrode that 2N (N be integer) individual emission unlike signal among each pitch Ts arranged vertical with direction of measurement, the electronic circuit of accepting electrode and carrying out data processing of a rectangle, the fixed grid wiring board is provided with towards above-mentioned emitting electrode and receiving electrode and along the reflecting electrode that is arranged in order on the direction of measurement, the length of receiving electrode is the integral multiple of the pitch T of emitting electrode, its two ends are respectively than the short T/2 in two outer ends of emitting electrode, the spacing of reflecting electrode equates with the pitch T of emitting electrode, it is characterized in that: adjacent emitting electrode is staggered respectively in the both sides of receiving electrode in same pitch T, with the individual pitch of NT (N is an integer) be each pitch in a group emitting electrode put in order identical, and staggered every putting in order of one group of emitting electrode.
Further technical solution of the present utility model is: in each pitch T, between pitch and the pitch and group with organize between the gap of adjacent transmission electrode on direction of measurement identical.
The utility model is owing to adopted the 2N group emitting electrode on whole moving grid wiring board to realize staggered, continuously, structure arranged with a gap, it has overcome the big and high shortcoming of matching requirements of manufacture difficulty that emitting electrode is arranged in the structure of receiving electrode one side in certain sequence successively with a gap, also overcome the emitting electrode zero stand-off, thereby the staggered and discontinuous structure that is arranged in the receiving electrode both sides because of having weakened the shortcoming that transmits and reduce measuring accuracy and increase the electrode manufacture difficulty, combine the advantage of above-mentioned two kinds of structures simultaneously, increase transmit signal strength, measure sensitivity thereby improve, do not increase manufacture difficulty and cost simultaneously again.
Description of drawings
The drawing of accompanying drawing is described as follows:
Fig. 1 is the structural representation of an embodiment of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model comprises and is located on the complementary scale moving grid wiring board 1 and is located at fixed grid wiring board 2 on the main scale that moving grid wiring board 1 and fixed grid wiring board 2 are made matrix with epoxy resin fiberglass cloth plate or electronic ceramics.There is a leptosomatic receiving electrode 4 centre of moving grid wiring board 1, in the both sides of receiving electrode 4 a row emitting electrode 3 is arranged respectively, carries out the electronic circuit of data processing in addition in addition.The width t of emitting electrode 3 is 0.5 millimeter, and the gap s of adjacent transmission electrode 3 is 0.08 millimeter.Before and after emitting electrode 3 is divided into two groups, every group has four pitch T, two groups of totally 8 pitch T.The spread pattern of the emitting electrode 3 in pitch T of preceding group is 1,3,5,7 for the upside at receiving electrode 4, and downside is 2,4,6,8.The spread pattern of emitting electrode 3 is staggered with preceding group in pitch of back group, and emitting electrode 3 is 2,4,6,8 at the upside of receiving electrode 4, and downside is 1,3,5,7, and all are numbered identical emitting electrode 3 and all interconnect.In each pitch T, between pitch and the pitch and group with organize between the gap of adjacent transmission electrode on direction of measurement identical.The length of receiving electrode 4 is 7 times of pitch T of emitting electrode 3, and its two ends are respectively than the short T/2 in two outer ends on an emitting electrode left side.Fixed grid wiring board 2 is provided with a series of electric reflecting electrodes 5 of going up insulation, and it is shaped as cross.The spacing of reflecting electrode 5 equals the pitch T of emitting electrode 3.Reflecting electrode 5 forms coupling capacitance with emitting electrode 3, receiving electrode 4.Emitting electrode 3 is communicated with electronic circuit by lead with receiving electrode 4.
Claims (2)
1. capacitor grid transducer that digital display calliper is used, comprise moving grid wiring board that is located on the complementary scale and the fixed grid wiring board that is located on the main scale, above-mentioned moving grid wiring board is provided with the emitting electrode that 2N (N be integer) individual emission unlike signal among each pitch Ts arranged vertical with direction of measurement, the electronic circuit of accepting electrode and carrying out data processing of a rectangle, the fixed grid wiring board is provided with towards above-mentioned emitting electrode and receiving electrode and along the reflecting electrode that is arranged in order on the direction of measurement, the length of receiving electrode is the integral multiple of the pitch T of emitting electrode, its two ends are respectively than the short T/2 in two outer ends of emitting electrode, the spacing of reflecting electrode equates with the pitch T of emitting electrode, it is characterized in that: adjacent emitting electrode is staggered respectively in the both sides of receiving electrode in same pitch T, with the individual pitch of NT (N is an integer) be each pitch in a group emitting electrode put in order identical, and staggered every putting in order of one group of emitting electrode, the adjacent transmission electrode is arranged on direction of measurement with a gap in 2N (N is an integer) group.
2. the capacitor grid transducer that a kind of digital display calliper according to claim 1 is used is characterized in that: in each pitch T, between pitch and the pitch and group with organize between the gap of adjacent transmission electrode on direction of measurement identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02226160 CN2526779Y (en) | 2002-03-14 | 2002-03-14 | Sensor for digital display callipers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02226160 CN2526779Y (en) | 2002-03-14 | 2002-03-14 | Sensor for digital display callipers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2526779Y true CN2526779Y (en) | 2002-12-18 |
Family
ID=33703225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02226160 Expired - Fee Related CN2526779Y (en) | 2002-03-14 | 2002-03-14 | Sensor for digital display callipers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2526779Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100541152C (en) * | 2003-11-04 | 2009-09-16 | 安德动态技术有限公司 | Be used in the signal-balanced shield electrode configuration in capacitive displacement sensing systems and the method |
| CN114295042A (en) * | 2021-12-30 | 2022-04-08 | 常熟理工学院 | Block-shaped elevator band-type brake gap monitoring device and method and early warning system |
-
2002
- 2002-03-14 CN CN 02226160 patent/CN2526779Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100541152C (en) * | 2003-11-04 | 2009-09-16 | 安德动态技术有限公司 | Be used in the signal-balanced shield electrode configuration in capacitive displacement sensing systems and the method |
| CN114295042A (en) * | 2021-12-30 | 2022-04-08 | 常熟理工学院 | Block-shaped elevator band-type brake gap monitoring device and method and early warning system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |