CN108613623A - Electrostatic self energizing strain transducer - Google Patents
Electrostatic self energizing strain transducer Download PDFInfo
- Publication number
- CN108613623A CN108613623A CN201810453077.2A CN201810453077A CN108613623A CN 108613623 A CN108613623 A CN 108613623A CN 201810453077 A CN201810453077 A CN 201810453077A CN 108613623 A CN108613623 A CN 108613623A
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- Prior art keywords
- sliding slot
- dielectric materials
- strain
- materials layer
- measured
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
Abstract
The present invention provides a kind of electrostatic self energizing strain transducer, strain for measuring component to be measured, including elongation strain and compression strain, sliding slot including a C fonts and the slide plate being arranged in sliding slot, component to be measured is fixed in one end of the sliding slot, fix the first dielectric materials layer and the second dielectric materials layer on the face of the opposite sliding of the sliding slot and slide plate respectively, the polarity of the polarity of the first dielectric materials layer and the second dielectric materials layer is opposite.For other strain gauge means, electrostatic self energizing strain transducer have many advantages, such as it is simple in structure, have a wide range of application, high certainty of measurement, without being additionally provided power supply.
Description
Technical field
The present invention relates to for a kind of electrostatic self energizing strain transducer device based on triboelectricity technology.
Background technology
The strain testing of structure is that engineering staff carries out Optimal Structure Designing, understands structural stress state and ensures structure
One critically important link of safety.In civil engineering industry now, strain measuring instrument is widely used in bridge, iron
The strain measurement on road, dam and various building facilities.Currently used strain measuring instrument mainly has amesdial strain gauge, electricity
Hinder strain gauge, vibrating string type sensor, etc..Wherein, as used amesdial strain gauge, due to mark length and the limit of installation
System is limited larger in practical applications；Such as use strain ga(u)ge, have non-linear, weak output signals, anti-interference ability compared with
Difference, it is affected by environment larger, and it can only survey one point of component surface cannot carry out universe survey along the strain in some direction
Amount；Such as use vibrating string type sensor, then it is more demanding to sensor material and processing technology, and measurement accuracy is relatively low.
Invention content
Technical problem to be solved by the invention is to provide a kind of electrostatic self energizing strain transducers, can be used in straining
Measurement can convert the deformation of member to be measured to electric energy and defeated as electronic signals and without being additionally provided the energy
Go out, while being also equipped with that precision is high, have a wide range of application, easy processing and feature easy to operate.
The technical proposal for solving the technical problem of the invention is：A kind of electrostatic self energizing strain transducer, is used for
The strain of component to be measured, including the sliding slot of a C fonts and the slide plate being arranged in sliding slot are measured, one end of the sliding slot is fixed on
Component to be measured, the slide plate are inserted into from the other end of sliding slot in sliding slot, and component to be measured is fixed in end；The sliding slot and slide plate
The first dielectric materials layer and the second dielectric materials layer, the first dielectric materials layer and the second dielectric are fixed respectively on the face of opposite sliding
Material layer is bonded；Between the second dielectric materials layer and slide plate and between the first dielectric materials layer and sliding slot, it is both provided with and leads
Electric layer.The polarity of first dielectric materials layer and the polarity of the second dielectric materials layer are opposite.
Further, the sliding slot is fixed on component to be measured by adhesive.
Further, further include measuring circuit, measuring circuit includes electric wire and electric signal measurement device, electric signal measurement dress
Set the potential difference measured between two conductive layers.
Further, the measuring circuit is integrated in the bottom of sliding slot.
The beneficial effects of the invention are as follows：The mechanics when present invention can strain component according to its power electric conversion properties
Rule is converted into electric signal, can use strain size by the signal processing apparatus in the device, therefore by output device
Electric signal is indicated and is exported.For other strain gauge means, electrostatic self energizing strain transducer have it is simple in structure,
Have a wide range of application, high certainty of measurement, without being additionally provided power supply the advantages that.
Description of the drawings
Fig. 1 is the structure chart of electrostatic self energizing strain transducer；
Fig. 2 is scheme of installation of the strain transducer shown in Fig. 1 on component to be measured；
Fig. 3 is the elongation strain measuring state of scheme of installation shown in Fig. 2；
Fig. 4 is the strain transducer motion state diagram under elongation strain measuring state shown in Fig. 3；
Fig. 5 is the compression strain measuring state of scheme of installation shown in Fig. 2；
Fig. 6 is the strain transducer motion state diagram under compression strain measuring state shown in Fig. 5.
Figure label：Sliding slot 1, slide plate 2, the first dielectric materials layer 3, the second dielectric materials layer 4, connecting elements 5；9 is to be measured
Component；l0For the initial mark of strain transducer；Component amount of tension/shortening amount when x (t) is t moment.
Specific implementation mode
Below in conjunction with attached drawing, the specific technical solution of invention is further described.
The present invention provides electrostatic self energizing strain transducer, the strain for measuring component to be measured, including a C fonts
Component to be measured is fixed in sliding slot 1 and the slide plate 2 being arranged in sliding slot, one end of the sliding slot 1, and the slide plate 2 is another from sliding slot 1
One end is inserted into sliding slot 1, and component to be measured is fixed in end；The is fixed on the face of the opposite sliding of the sliding slot 1 and slide plate 2 respectively
One dielectric materials layer 3 and the second dielectric materials layer 4, the first dielectric materials layer 3 and the fitting of the second dielectric materials layer 4；It is situated between second
Between material layer 4 and slide plate 2 and between the first dielectric materials layer 3 and sliding slot 1, it is both provided with conductive layer and (does not show in figure
Go out), for exporting charge.The polarity of first dielectric materials layer and the polarity of the second dielectric materials layer are opposite.
Installation form is as shown in Figure 2 (1 left end of sliding slot is fixed on component to be measured, and 2 right end of slide plate is fixed on component to be measured).
During structure to be measured stretches (Fig. 3) or compression (Fig. 5), relative displacement occurs for sliding slot 1 and slide plate 2, between two dielectric materials
It rubs, generates positive and negative charge respectively；It is measured through electric signal measurement device, you can measure potential difference.According to the potential difference, lead to
Cross the deformation quantity that conversion can be obtained component to be measured.The electric signal measurement device and relevant connecting wire can be integrated in sliding slot
Bottom.
Connecting elements 5 can be adhesive, but not limited to this.
The electrostatic self energizing strain transducer of the present invention realizes that the principle of strain measurement is as follows：
By taking the measuring state of elongation strain shown in Fig. 3 as an example, at a time when t, component amount of tension be x (t), i.e., first
The relative shift of electrode layer and the second electrode lay is x (t), and component strain expression formula is at this time：
Wherein ε (t) is the strain of t moment component to be measured, l0Component measuring section is first when being installed for strain transducer device
Beginning length.
In electrostatic self energizing strain transducer, the thickness of two kinds of dielectric materials is respectively d1And d2, opposite Jie of the two
Electric constant is respectively εr1And εr2.X (t) represents the relative displacement applied between the electrode plate there are two types of dielectric material.Work as strain sensing
When device device works, x (t) changes from 0 to maximum.When the electrode plate that two are coated with dielectric material without relative displacement (i.e. x (t)=
0), electrode plate charges, and the surface of two electrode plates obtains opposite electrostatic charge, has equal charge density σ (contact friction productions
Raw charge density).And when two electrode plates generate relative displacement, charge generates electric current through additional circuit.Work as load resistance
When being given as R, the expression formula of quantity of electric charge Q is：
Wherein d0=d1/εr1+d2/εr2, it is the equivalent thickness of dielectric material, l is the length that dielectric material is coated on electrode plate
Degree, w are the width that dielectric material is coated on electrode plate, ε0For permittivity of vacuum.
Thus voltage is represented by：
(3) three formula of simultaneous (1) (2), can obtaining voltage V (t), there are mapping relations ε by t at a certain moment with dependent variable ε (t)
(t) → V (t), i.e. certain moment t can be derived that acceleration ε (t) this moment to pass through measuring circuit by measuring voltage V (t)
Acceleration magnitude is expressed as electric signal.
Compression strain measuring state principle shown in fig. 5 is same as described above.
Claims (4)
1. a kind of electrostatic self energizing strain transducer, the strain for measuring component to be measured, characterized in that including a C fonts
Sliding slot and the slide plate that is arranged in sliding slot, component to be measured is fixed in one end of the sliding slot；The slide plate is from the another of sliding slot
End is inserted into sliding slot, and component to be measured is fixed in end；First Jie is fixed respectively on the face of the sliding slot and the opposite sliding of slide plate
Material layer and the second dielectric materials layer, the first dielectric materials layer and the fitting of the second dielectric materials layer；In the second dielectric materials layer
Between slide plate and between the first dielectric materials layer and sliding slot, it is both provided with conductive layer.The polarity of first dielectric materials layer and
The polarity of second dielectric materials layer is opposite.
2. sensor according to claim 1, characterized in that the sliding slot is fixed on component to be measured by adhesive.
3. sensor according to claim 1, characterized in that further include measuring circuit, measuring circuit includes electric wire and electricity
Signal measurement apparatus, electric signal measurement device measure the potential difference between two conductive layers.
4. sensor according to claim 3, characterized in that the measuring circuit is integrated in the bottom of sliding slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810453077.2A CN108613623B (en) | 2018-05-11 | 2018-05-11 | Electrostatic self-powered strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810453077.2A CN108613623B (en) | 2018-05-11 | 2018-05-11 | Electrostatic self-powered strain sensor |
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| Publication Number | Publication Date |
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| CN108613623A true CN108613623A (en) | 2018-10-02 |
| CN108613623B CN108613623B (en) | 2020-09-15 |
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| CN201810453077.2A Active CN108613623B (en) | 2018-05-11 | 2018-05-11 | Electrostatic self-powered strain sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458922A (en) * | 2018-11-05 | 2019-03-12 | 浙江大学 | A kind of electrostatic self energizing displacement grid sensor |
| CN110375634A (en) * | 2019-06-26 | 2019-10-25 | 上海建工集团股份有限公司 | A kind of sliding rheostat strain gauge and its application method |
| CN111059995A (en) * | 2019-12-28 | 2020-04-24 | 浙江大学 | Self-driven displacement sensor based on friction nano generator |
| WO2020093735A1 (en) * | 2018-11-05 | 2020-05-14 | 浙江大学 | Electrostatic self-powered strain grid sensor |
| CN111156912A (en) * | 2019-12-28 | 2020-05-15 | 浙江大学 | Self-driven strain sensor based on flexible photoelectric nano film |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458922A (en) * | 2018-11-05 | 2019-03-12 | 浙江大学 | A kind of electrostatic self energizing displacement grid sensor |
| WO2020093735A1 (en) * | 2018-11-05 | 2020-05-14 | 浙江大学 | Electrostatic self-powered strain grid sensor |
| WO2020093733A1 (en) * | 2018-11-05 | 2020-05-14 | 浙江大学 | Electrostatic self-powered displacement grid sensor |
| JP2021500529A (en) * | 2018-11-05 | 2021-01-07 | 浙江大学Ｚｈｅｊｉａｎｇ Ｕｎｉｖｅｒｓｉｔｙ | Electrostatic self-energy supply strain grid sensor |
| US11143496B2 (en) | 2018-11-05 | 2021-10-12 | Zhejiang University | Electrostatic self-powered strain grid sensor |
| US11402293B2 (en) | 2018-11-05 | 2022-08-02 | Zhejiang University | Electrostatic self-powered displacement grid sensor |
| CN110375634A (en) * | 2019-06-26 | 2019-10-25 | 上海建工集团股份有限公司 | A kind of sliding rheostat strain gauge and its application method |
| CN111059995A (en) * | 2019-12-28 | 2020-04-24 | 浙江大学 | Self-driven displacement sensor based on friction nano generator |
| CN111156912A (en) * | 2019-12-28 | 2020-05-15 | 浙江大学 | Self-driven strain sensor based on flexible photoelectric nano film |
| CN111156912B (en) * | 2019-12-28 | 2020-11-13 | 浙江大学 | Self-driven strain sensor based on flexible photoelectric nano film |
| WO2021129370A1 (en) * | 2019-12-28 | 2021-07-01 | 浙江大学 | Self-driving strain sensor based on flexible photoelectric nano-film |
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