CN204008809U - Electrostatic potential testing sensor - Google Patents
Electrostatic potential testing sensor Download PDFInfo
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- CN204008809U CN204008809U CN201420397792.6U CN201420397792U CN204008809U CN 204008809 U CN204008809 U CN 204008809U CN 201420397792 U CN201420397792 U CN 201420397792U CN 204008809 U CN204008809 U CN 204008809U
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- piezoelectric ceramics
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Abstract
The utility model relates to a kind of electrostatic potential testing sensor, the problem that mainly solve electrostatic potential proving installation design complexity in prior art, need to contact.The utility model is by adopting a kind of electrostatic potential testing sensor, comprise piezoelectric ceramics feedback wafer, piezoelectric ceramics driving piece, the plate condenser vibration utmost point, printed circuit board (PCB) (pcb board) and the beam that shakes, the beam that wherein shakes is fixed on pcb board, piezoelectric ceramics feedback wafer, piezoelectric ceramics driving piece respectively has one side to join with the beam that shakes, the beam that shakes is extremely connected with plate condenser vibration, piezoelectric ceramics driving piece is connected with alternating voltage driver, the technical scheme that piezoelectric ceramics feedback wafer is connected with sensor drive driving circuit has solved the problems referred to above preferably, can be used in the test of electrostatic potential.
Description
Technical field
The utility model relates to a kind of electrostatic potential testing sensor, is particularly useful for the electrostatic potential test of oil product.
Background technology
The oil product of petroleum chemical industry transport with loading and unloading operation process in, between oil product and tube wall, chamber wall, come in contact and separate again, as easy as rolling off a log charged.Along with gathering of static, oil-gas space very easily causes burning and blast, and static is the main cause of initiation fire accident.Therefore, monitor timely and accurately electrostatic charge of oil amount, just become the advanced subject that static research and industrial control field are extremely paid close attention to.
CN 201310303386.9 discloses a kind of Non-contact Electrostatic Voltmeter calibrating installation and calibration steps, utilize DC high-voltage power supply and metal plate electrode, near electrode centers, local space obtains standard electrostatic field, its voltage can be traceable to DC voltage standard, adopts the test method that increases the weight of edge effect to check the edge effect of metal plate electrode.The danger that the glass plate support of bearing metal plate electrode and protective resistance minimizing personnel are electrically shocked, the adjustable measuring distance that is calibrated table of vertical movement mechanism, adopts dismountable vernier caliper, is convenient to trace to the source.
Existing electrostatic potential testing apparatus all designs complexity, and is contact, and the utility model has solved this problem targetedly.
Utility model content
Technical problem to be solved in the utility model is electrostatic potential proving installation design complexity in prior art, needs the problem of contact, a kind of new electrostatic potential testing sensor is provided.This sensor, for the test of electrostatic potential, has advantages of electrostatic potential proving installation simplicity of design, does not need contact.
For addressing the above problem, the technical solution adopted in the utility model is as follows: a kind of electrostatic potential testing sensor, comprise piezoelectric ceramics feedback wafer, piezoelectric ceramics driving piece, plate condenser the vibration utmost point, printed circuit board (PCB) (pcb board) and the beam that shakes, the beam that it is characterized in that shaking is fixed on pcb board, piezoelectric ceramics feedback wafer, piezoelectric ceramics driving piece respectively have one side to join with the beam that shakes, the beam that shakes is extremely connected with plate condenser vibration, piezoelectric ceramics driving piece is connected with alternating voltage driver, and piezoelectric ceramics feedback wafer is connected with sensor drive driving circuit.
In technique scheme, preferably, described in the beam that shakes be welded on pcb board.
Under the effect of external electric field, can there is resonance because of distortion in piezoelectric ceramics.Integral density of the fundamental frequency of resonance and potsherd thickness, ceramic radius, piezoelectric ceramic piece and metal vibrating reed etc. is relevant.Piezoelectric ceramics is made to a pole plate of capacitor, in the situation that external electric field exists, the effect of external electric field to piezoelectric ceramics changes polar plate spacing thereupon, thereby capacitor C (t) constantly changes.In the case of the voltage U between amount capacitor plate is certain, charge Q (t) on pole plate just changes with the variation of capacitor C (t), just obtain the weak current signal of an alternation, recycling Weak Signal Detecting Circuit amplifies and produces Voltage-output this electric current.Its principle can be illustrated by following formula:
U＝Q(t)/C(t)
The variation of Q (t) causes the mutual movement of electric charge between two-plate, thereby forms electric current, and concerning same sensor (being that C (t) is given), the size of electric current has reflected the power of electric field, has also reflected the magnitude of voltage of static.
This patent utilizes the piezoelectric property of piezoelectric ceramics, by non-contacting field coupled, detects electrostatic potential, and the static that is applicable in petroleum chemical enterprise oil product in the interior and pipeline of oil tank in oil product storage transportation detects online, has obtained good technique effect.
Brief description of the drawings
Fig. 1 is the structural representation of sensor described in the utility model.
In Fig. 1,1 is piezoelectric ceramics feedback wafer; 2 is piezoelectric ceramics driving piece; 3 is the beam that shakes; 4 is the plate condenser vibration utmost point.
Below by embodiment, the utility model is further elaborated, but is not limited only to the present embodiment.
Embodiment
[embodiment 1]
A kind of electrostatic potential testing sensor, as shown in Figure 1, comprise piezoelectric ceramics feedback wafer, piezoelectric ceramics driving piece, the plate condenser vibration utmost point, pcb board and the beam that shakes, the beam that it is characterized in that shaking is fixed on pcb board, piezoelectric ceramics feedback wafer, piezoelectric ceramics driving piece respectively have one side to join with the beam that shakes, the beam that shakes is extremely connected with plate condenser vibration, and piezoelectric ceramics driving piece is connected with alternating voltage driver, and piezoelectric ceramics feedback wafer is connected with sensor drive driving circuit.
For sensor is effectively worked, the beam that shakes must be in the good folder state that is subject to; The beam that shakes is welded in the ground end of pcb board to metering circuit.This sensor has utilized the piezoelectric property of piezoelectric ceramics, its course of work is: alternating voltage is added in piezoelectric ceramics driving piece, making to shake, (piezoelectric ceramics converts electrical energy into mechanical energy by inverse piezoelectric effect to beam vibration under action of alternative electric field, produce mechanical vibration), thereby the interchange feedback signal that causes piezoelectric ceramics feedback wafer deformation generation same frequency is done positive feedback (mechanical energy being converted to electric energy by piezoelectric effect) and the differentiation for positive and negative static for sensor drive driving circuit, the vibration utmost point of plate condenser receives vibration and amplitude maximum, form pole plate apart from alternation (being capacitance alternation) with another static utmost point of capacity plate antenna.Capacitance change causes the change of electric charge on pole plate, so produced the current signal of alternation.The size of electric current has reflected the power of electric field, has also reflected the magnitude of voltage of static.
Claims (2)
1. an electrostatic potential testing sensor, comprise piezoelectric ceramics feedback wafer, piezoelectric ceramics driving piece, plate condenser the vibration utmost point, printed circuit board (PCB) (pcb board) and the beam that shakes, the beam that it is characterized in that shaking is fixed on pcb board, piezoelectric ceramics feedback wafer, piezoelectric ceramics driving piece respectively have one side to join with the beam that shakes, the beam that shakes is extremely connected with plate condenser vibration, piezoelectric ceramics driving piece is connected with alternating voltage driver, and piezoelectric ceramics feedback wafer is connected with sensor drive driving circuit.
2. electrostatic potential testing sensor according to claim 1, the beam that shakes described in it is characterized in that is welded on pcb board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420397792.6U CN204008809U (en) | 2014-07-17 | 2014-07-17 | Electrostatic potential testing sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420397792.6U CN204008809U (en) | 2014-07-17 | 2014-07-17 | Electrostatic potential testing sensor |
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| Publication Number | Publication Date |
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| CN204008809U true CN204008809U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420397792.6U Active CN204008809U (en) | 2014-07-17 | 2014-07-17 | Electrostatic potential testing sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569626A (en) * | 2015-01-13 | 2015-04-29 | 西安交通大学 | Electrostatic field sensor and electrostatic alarm system and method based on electrostatic field sensor |
| CN108828291A (en) * | 2018-06-04 | 2018-11-16 | 西安交通大学 | One kind being used for high-pressure electrostatic voltage MEMS micromirror sensor measured directly |
| CN110768568A (en) * | 2018-07-27 | 2020-02-07 | 成都理想境界科技有限公司 | Piezoelectric actuator, optical fiber scanning module and projection device |
| CN112528933A (en) * | 2020-12-22 | 2021-03-19 | 厦门天马微电子有限公司 | Flexible circuit board, display device and manufacturing method thereof |
-
2014
- 2014-07-17 CN CN201420397792.6U patent/CN204008809U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569626A (en) * | 2015-01-13 | 2015-04-29 | 西安交通大学 | Electrostatic field sensor and electrostatic alarm system and method based on electrostatic field sensor |
| CN108828291A (en) * | 2018-06-04 | 2018-11-16 | 西安交通大学 | One kind being used for high-pressure electrostatic voltage MEMS micromirror sensor measured directly |
| CN108828291B (en) * | 2018-06-04 | 2021-07-13 | 西安交通大学 | MEMS micro-mirror sensor for directly measuring high-voltage electrostatic voltage |
| CN110768568A (en) * | 2018-07-27 | 2020-02-07 | 成都理想境界科技有限公司 | Piezoelectric actuator, optical fiber scanning module and projection device |
| CN112528933A (en) * | 2020-12-22 | 2021-03-19 | 厦门天马微电子有限公司 | Flexible circuit board, display device and manufacturing method thereof |
| CN112528933B (en) * | 2020-12-22 | 2022-09-27 | 厦门天马微电子有限公司 | Flexible circuit board, display device and manufacturing method thereof |
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