CN201804050U - Vibrating capacitor type electrostatic sensor having laser positioning function - Google Patents
Vibrating capacitor type electrostatic sensor having laser positioning function Download PDFInfo
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- CN201804050U CN201804050U CN2010205476721U CN201020547672U CN201804050U CN 201804050 U CN201804050 U CN 201804050U CN 2010205476721 U CN2010205476721 U CN 2010205476721U CN 201020547672 U CN201020547672 U CN 201020547672U CN 201804050 U CN201804050 U CN 201804050U
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Abstract
The utility model discloses a vibrating capacitor type electrostatic sensor having the laser positioning function, which belongs to the vibrating capacitor type electrostatic sensor, and solves the problem of low measurement precision of electrostatic sensors in the prior art. An electrostatic field conduction window is provided on sensitive elements. The signal output ends of sensitive elements are connected with the signal input end of the amplification circuit, the signal output end of the amplification circuit is connected with the signal input end of the filter, and the signal output end of the filter is connected with the signal input end of the signal compensation circuit. Two laser tubes are symmetrically distributed on the left side and the right side of sensitive elements, and laser beams emitted from two laser tube concentrate on the extension of the central line of sensitive elements. The utility model is suitable for electrostatic test during manufacturing, test, assembling, production, and in-situ operation of electronic products.
Description
Technical field
The utility model relates to a kind of appearance formula electrostatic transducer that shakes.
Background technology
The method of testing of existing electrostatic charge can be divided into contact type measurement and non-contact measurement.Because contact method of testing error is big and repdocutbility is poor, generally is not used.Non-contact measurement has three kinds of test modes, is respectively direct induction type, Spiralism type and capacitance-type vibration formula.Directly the shortcoming of inductive measuring is poor stability, is subject to disturb.The shortcoming that Spiralism type is measured is that operation drives by high-speed electric expreess locomotive, and power consumption is many, volume is big, poor reliability, is not suitable for long-term use.Measure the shortcoming that has effectively solved preceding two kinds of metering systems based on capacitance-type vibration formula principle, but the measuring accuracy of the existing appearance formula electrostatic transducer that shakes is lower.
The utility model content
The utility model is in order to solve the low problem of measuring accuracy of the existing appearance formula electrostatic transducer that shakes, thereby a kind of appearance formula electrostatic transducer that shakes with laser positioning function is provided.
The appearance formula electrostatic transducer that shakes with laser positioning function, it comprises sensitive element, circuit board, two laser tubes and wave filter, comprise signal amplification circuit and signal compensation circuit on the circuit board, have the electrostatic field receiver window on the sensitive surface of sensitive element, the signal output part of sensitive element is connected with the signal input part of amplifying circuit, the signal output part of amplifying circuit is connected with the signal input part of wave filter, and the signal output part of wave filter is connected with the signal input part of signal compensation circuit; Two laser tubes are symmetrically distributed in the and arranged on left and right sides of sensitive element, and the laser beam that sends of described two laser tubes is focused on the extended line of center line of sensitive element.
The utility model is measurement of electrostatic voltage accurately, existing on year-on-year basis vibration static sensor, its measuring accuracy is higher, its precision can reach in 5%, and the utility model can also be differentiated the polarity of electrostatic field, is particularly suitable for the electrostatic test that electronic product is fabricated onto test, assembling, production, field apparatus operation.
Description of drawings
Fig. 1 is a structural representation of the present utility model; Fig. 2 is that the A-A of Fig. 1 is to cut-open view; Fig. 3 is an electrical schematic diagram of the present utility model.
Embodiment
Embodiment one, in conjunction with Fig. 1 to Fig. 3 this embodiment is described, the appearance formula electrostatic transducer that shakes with laser positioning function, it comprises sensitive element 2, circuit board 3, wave filter 7 and two laser tubes 5, comprise signal amplification circuit 31 and signal compensation circuit 32 on the circuit board 3, sensitive element 2 sensitive surface have electrostatic field receiver window 4, the signal output part of sensitive element 2 is connected with the signal input part of amplifying circuit 31, the signal output part of amplifying circuit 31 is connected with the signal input part of wave filter 7, and the signal output part of wave filter 7 is connected with the signal input part of signal compensation circuit 32; Two laser tubes 5 are symmetrically distributed in the and arranged on left and right sides of sensitive element 2, and the laser beam that sends of described two laser tubes 5 is focused on the extended line of center line of sensitive element 2.
Thereby the utility model is to respond to static electric field measurement of electrostatic current potential by sensitive element 2, its principle is that the sensitive element 2 by placing electrostatic field produces feeble signal at electrostatic field, detects described feeble signal and this feeble signal amplified to produce voltage output.Simultaneously, present embodiment is according to the difference of distance of reaction index request when measuring, and adopts laser accurately to set distance between sensitive surface and the electrified body, adopts two laser positioning pipes, by adjusting setting angle, make two bundle laser focusings in a preset distance a bit.During test, sensor is placed on the laser positioning point, when guaranteeing each the measurement between sensor and the electrified body distance identical, thereby greatly reduce random deviation of measurement, effectively improved the measurement accuracy of sensor.
In the present embodiment, after sensitive element 2 is sensed signal, after amplifying, the 32 pairs of signals of amplifying circuit, and, finally export the corresponding standard signal after signal compensation circuit 33 is changed and compensated by 7 pairs of signal Processing of wave filter.
The utility model can be fixed on the place ahead of testee by outer hanging bracket 11 in use.Circuit board 3 of the present utility model is fixed on the fixed base plate 6 by two pillars 9.The utility model can also be installed pilot lamp 13 and switch 12 in the outside of housing, described pilot lamp 13 and switch 12 are connected in the utility model circuit board 3, is used for to the demonstration of working state of system and to the control of system works.
Embodiment two, this embodiment and embodiment one described difference with the appearance formula electrostatic transducer that shakes of laser positioning function are, also comprise feed circuit 33 on the circuit board 3, the power supply signal output terminal of described feed circuit 33 is connected with the power supply signal input end of sensitive element 2, the power supply signal input end of signal amplification circuit 31, the power supply signal input end of wave filter 7 and the power supply signal input end of signal compensation circuit 32 simultaneously.
Embodiment three, this embodiment and embodiment two described differences with the appearance formula electrostatic transducer that shakes of laser positioning function are; also comprise power supply protection circuit 34 on the circuit board 3, the signal output part of described power supply protection circuit 34 is connected with the signal input part of feed circuit 33.
Embodiment four, this embodiment and embodiment three described differences with the appearance formula electrostatic transducer that shakes of laser positioning function are, it also comprises housing 1, and sensitive element 2, circuit board 3, two laser tubes 5 and wave filter 7 all are encapsulated in the housing 1.
Embodiment five, this embodiment and embodiment four described differences with the appearance formula electrostatic transducer that shakes of laser positioning function are, it also comprises fixed base plate 6, described fixed base plate 6 is fixed on the bottom of housing 1, and sensitive element 2 and two laser tubes 5 all are fixed on the fixed base plate 6.
Embodiment six, this embodiment and embodiment five described differences with the appearance formula electrostatic transducer that shakes of laser positioning function are, also comprise two laser tube fixed mounts 8, described two laser tube fixed mounts 8 are separately fixed on the fixed base plate 6, and lay respectively at the both sides of sensitive element 2, described two laser tubes 5 are separately fixed in two laser tube fixed mounts 8.
Embodiment seven, this embodiment and embodiment six described differences with the appearance formula electrostatic transducer that shakes of laser positioning function are, it also comprises metal shielding board, described metal shielding board is fixed on the circuit board 3, and between sensitive element 2 and integrated chip.
Present embodiment can improve the anti-electromagnetic interference capability of sensor.Because sensor is a current potential of measuring high-strength electric field, be vulnerable on every side Electromagnetic Interference and make output produce error, influence accuracy of measurement, therefore added metal shielding board, be used for shield electromagnetic, can effectively reduce the electromagnetic interference (EMI) of highfield, guarantee that the chip performance parameter does not change, and then sensor performance is guaranteed integrated chip.
Embodiment eight, this embodiment and embodiment seven described differences with the appearance formula electrostatic transducer that shakes of laser positioning function are that signal compensation circuit 32 adopts chip microcontroller.
Embodiment nine, this embodiment and embodiment eight described differences with the appearance formula electrostatic transducer that shakes of laser positioning function are that single-chip microcomputer is that model is the PIC16F Series chip.
Embodiment ten, this embodiment and embodiment nine described differences with the appearance formula electrostatic transducer that shakes of laser positioning function are that sensitive element 2 is the flat capacitor device.
Thereby present embodiment is responded to static electric field measurement of electrostatic current potential by the flat capacitor device, its principle be by placing electrostatic field the plate condenser polar plate spacing from change, thereby the variation that causes voltage on the pole plate produces feeble signal, utilizes the Detection of Weak Signals circuit that this signal is amplified again and produces voltage output.The capacitance-type vibration pole plate is a vibratile sheet metal, because mechanical vibration, makes electric capacity cyclical variation between rapier and the measured body, and under the effect of measured body electrostatic induction, the voltage of responding on the pole plate also periodically changes.
Claims (10)
1. the appearance formula electrostatic transducer that shakes that has the laser positioning function, it is characterized in that: it comprises sensitive element (2), circuit board (3), wave filter (7) and two laser tubes (5), comprise signal amplification circuit (31) and signal compensation circuit (32) on the circuit board (3), have electrostatic field receiver window (4) on the sensitive surface of sensitive element (2), the signal output part of sensitive element (2) is connected with the signal input part of amplifying circuit (31), the signal output part of amplifying circuit (31) is connected with the signal input part of wave filter (7), and the signal output part of wave filter (7) is connected with the signal input part of signal compensation circuit (32); Two laser tubes (5) are symmetrically distributed in the and arranged on left and right sides of sensitive element (2), and the laser beam that sends of described two laser tubes (5) is focused on the extended line of center line of sensitive element (2).
2. the appearance formula electrostatic transducer that shakes with laser positioning function according to claim 1, it is characterized in that also comprising on the circuit board (3) feed circuit (33), the power supply signal output terminal of described feed circuit (33) is connected with the power supply signal input end of sensitive element (2), the power supply signal input end of signal amplification circuit (31), the power supply signal input end of wave filter (7) and the power supply signal input end of signal compensation circuit (32) simultaneously.
3. the appearance formula electrostatic transducer that shakes with laser positioning function according to claim 2; it is characterized in that also comprising on the circuit board (3) power supply protection circuit (34), the signal output part of described power supply protection circuit (34) is connected with the signal input part of feed circuit (33).
4. the appearance formula electrostatic transducer that shakes with laser positioning function according to claim 3 is characterized in that it also comprises housing (1), and sensitive element (2), circuit board (3), two laser tubes (5) and wave filter (7) all are encapsulated in the housing (1).
5. the appearance formula electrostatic transducer that shakes with laser positioning function according to claim 4, it is characterized in that it also comprises fixed base plate (6), described fixed base plate (6) is fixed on the bottom of housing (1), and sensitive element (2) and two laser tubes (5) all are fixed on the fixed base plate (6).
6. the appearance formula electrostatic transducer that shakes with laser positioning function according to claim 5, it is characterized in that it also comprises two laser tube fixed mounts (8), described two laser tube fixed mounts (8) are separately fixed on the fixed base plate (6), and lay respectively at the both sides of sensitive element (2), described two laser tubes (5) are separately fixed in two laser tube fixed mounts (8).
7. the appearance formula electrostatic transducer that shakes with laser positioning function according to claim 6 is characterized in that it also comprises metal shielding board, and the side of described metal shielding board is fixed on the circuit board (3), and is positioned between sensitive element (2) and the integrated chip.
8. the appearance formula electrostatic transducer that shakes with laser positioning function according to claim 7 is characterized in that signal compensation circuit (32) adopts chip microcontroller.
9. the appearance formula electrostatic transducer that shakes with laser positioning function according to claim 8 is characterized in that single-chip microcomputer is that model is the PIC16F Series chip.
10. the appearance formula electrostatic transducer that shakes with laser positioning function according to claim 9 is characterized in that sensitive element (2) is the flat capacitor device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205476721U CN201804050U (en) | 2010-09-29 | 2010-09-29 | Vibrating capacitor type electrostatic sensor having laser positioning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205476721U CN201804050U (en) | 2010-09-29 | 2010-09-29 | Vibrating capacitor type electrostatic sensor having laser positioning function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201804050U true CN201804050U (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205476721U Expired - Fee Related CN201804050U (en) | 2010-09-29 | 2010-09-29 | Vibrating capacitor type electrostatic sensor having laser positioning function |
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| Country | Link |
|---|---|
| CN (1) | CN201804050U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949981A (en) * | 2010-09-29 | 2011-01-19 | 中国电子科技集团公司第四十九研究所 | Vibration capacity type electrostatic sensor with laser positioning function |
-
2010
- 2010-09-29 CN CN2010205476721U patent/CN201804050U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949981A (en) * | 2010-09-29 | 2011-01-19 | 中国电子科技集团公司第四十九研究所 | Vibration capacity type electrostatic sensor with laser positioning function |
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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: 20110420 Termination date: 20170929 |