CN108415628B - Capacitance sensor - Google Patents
Capacitance sensor Download PDFInfo
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- CN108415628B CN108415628B CN201810049283.7A CN201810049283A CN108415628B CN 108415628 B CN108415628 B CN 108415628B CN 201810049283 A CN201810049283 A CN 201810049283A CN 108415628 B CN108415628 B CN 108415628B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a capacitance sensor, which comprises an outer sphere, an inner sphere and a detection tube arranged between the outer sphere and the inner sphere, wherein the detection tube comprises: the whole capacitive sensor has a multidirectional sound wave directional induction feedback function due to the distribution and fixing structure of the detection tubes between the outer sphere and the inner sphere; the whole body of the detection tube consists of a tubular tube body, a circular fixed polar plate, a supporting cone of a circular cone structure and a resonant polar plate, wherein the fixed polar plate, the resonant polar plate and a gap space between the fixed polar plate and the resonant polar plate form a very simple capacitor body structure; the wall bodies of the outer ball body, the inner ball body, the detection tube, the inner guide tube and the outer guide tube are all formed by a silencing plate, and the silencing plate is formed by an absorption plate, a supporting plate and a separation plate, so that the anti-interference capability of the whole capacitive sensor is greatly enhanced.
Description
Technical Field
The invention relates to the technical field of capacitive sensors, in particular to a capacitive sensor.
Background
An ultrasonic sensor is a sensor that converts an ultrasonic signal into another energy signal (typically an electrical signal). Ultrasonic waves are mechanical waves with vibration frequencies above 20 KHz. It has the features of high frequency, short wavelength, less diffraction, high directivity, directional propagation, etc. The penetration of ultrasonic waves into liquids and solids is great, especially in sunlight-opaque solids. Ultrasonic waves hitting impurities or interfaces can generate significant reflection to form echoes, and the Doppler effect can be generated when the ultrasonic waves hit a moving object. The ultrasonic sensor is widely applied to the aspects of industry, national defense, biomedicine and the like.
In the prior art, most of ultrasonic sensors in mobile phones are of a single structure, besides ultrasonic waves, the ultrasonic sensors cannot receive sound waves of other wave bands, a special ultrasonic transmitting device needs to be arranged during use, the structure composition of the whole device is complex, the manufacturing cost is high, and the problems can be well solved if a capacitive sensor with a simple structure for multi-angle and multi-range directional detection can be designed.
Disclosure of Invention
It is an object of the present invention to provide a capacitive sensor to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a capacitance sensor comprises an outer sphere, an inner sphere and a detection tube arranged between the outer sphere and the inner sphere;
the wall body of the outer sphere is provided with uniformly distributed circular detection holes, the inner sphere and the outer sphere are concentric, the wall body of the inner sphere is provided with circular fixing holes at positions corresponding to the detection holes, and detection tubes are sleeved between the fixing holes and the detection holes;
the main body of the detection tube is a cylindrical tube body, a circular fixed polar plate is arranged at the bottom of the tube body, four uniformly distributed support cones are arranged at the upper end of the fixed polar plate, and a circular resonance polar plate fixedly connected with the support cones is arranged on the upper end face of each support cone;
the inner sphere body is characterized in that a guide hole I is formed in the middle of the bottom of the inner sphere body, a cylindrical inner guide pipe fixedly connected with the guide hole I is arranged in the guide hole I in a sleeved mode, a cylindrical outer guide pipe fixedly connected with the bottom of the inner sphere body is arranged on the outer side of the inner guide pipe, the outer guide pipe is coaxial with the inner guide pipe, a guide hole II is formed between the outer guide pipe and the inner guide pipe and on the wall body of the inner sphere body, the outer guide pipe penetrates through the outer sphere body and is fixedly connected with the wall body of the outer sphere body into a whole, and the outer guide pipe penetrates through the outer sphere body and then.
Preferably, the upper end of the pipe body is fixedly connected with the detection hole, and the lower end of the pipe body penetrates through the fixing hole and is fixedly connected with the fixing hole.
Preferably, the fixed polar plate is connected with the tube body together, so that a sealed cavity structure is formed at the bottom of the tube body.
Preferably, the supporting cones are in a conical structure with a large bottom and a small top, and the supporting cones are uniformly distributed and arranged along the circumference of the fixed polar plate.
Preferably, the wall bodies of the outer sphere, the inner sphere, the detection tube, the inner guide tube and the outer guide tube are all formed by sound absorption plates, the outer sides of the sound absorption plates are symmetrically provided with absorption plates, the core parts of the sound absorption plates are provided with supporting plates, and isolation plates are symmetrically arranged between the supporting plates and the absorption plates on the two sides.
Preferably, the absorption plate is a plate body with a porous and loose structure.
Preferably, the support plate is a plate body with a compact structure.
Preferably, the isolation plate is a plate body with an elastic structure.
Preferably, the resonance polar plate is of a thin-wall plate structure, the diameter of the resonance polar plate is two millimeters smaller than that of the fixed polar plate, and the diameter of the fixed polar plate is equal to the inner diameter of the tube body.
Compared with the prior art, the invention has the beneficial effects that:
1. the whole capacitive sensor has a multidirectional sound wave directional induction feedback function due to the distribution and fixing structure of the detection tubes between the outer sphere and the inner sphere;
2. the whole body of the detection tube consists of a tubular tube body, a circular fixed polar plate, a supporting cone of a circular cone structure and a resonant polar plate, wherein the fixed polar plate, the resonant polar plate and a gap space between the fixed polar plate and the resonant polar plate form a very simple capacitor body structure;
3. compared with other shapes, the whole capacitive sensor is of a spherical structure, so that the occupied space of the whole capacitive sensor is greatly saved;
4. the wall bodies of the outer ball body, the inner ball body, the detection tube, the inner guide tube and the outer guide tube are all formed by a silencing plate, and the silencing plate is formed by an absorption plate, a supporting plate and a separation plate, so that the anti-interference capability of the whole capacitive sensor is greatly enhanced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 2;
FIG. 4 is an enlarged view of the structure at B in FIG. 2;
FIG. 5 is a schematic structural view of an acoustic panel;
fig. 6 is a schematic diagram of the working principle of the probe tube.
In the figure: the device comprises an outer sphere 1, an inner sphere 2, a probe tube 3, an inner guide tube 4, an outer guide tube 5, an acoustic board 6, a probe hole 101, a guide hole 201I, a guide hole 202 II, a fixed hole 203, a tube body 301, a fixed pole plate 302, a supporting cone 303, a resonant pole plate 304, an absorption board 601, a separation board 602 and a supporting board 603.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a capacitive sensor comprises an outer sphere 1, an inner sphere 2 and a detection tube 3 arranged between the outer sphere 1 and the inner sphere 2;
the wall body of the outer sphere 1 is provided with uniformly distributed circular detection holes 101, the inner sphere 2 is concentric with the outer sphere 1, the wall body of the inner sphere 2 is provided with circular fixing holes 203 at positions corresponding to the detection holes 101, and the detection tube 3 is sleeved between the fixing holes 203 and the detection holes 101, so that the detection tube 3 is well fixed between the inner sphere 2 and the outer sphere 1, and the whole sensor (capacitive sensor) has a multi-direction directional detection function;
the main body of the detection tube 3 is a cylindrical tube body 301, a circular fixed polar plate 302 is arranged at the bottom of the tube body 301, four uniformly distributed support cones 303 are arranged at the upper end of the fixed polar plate 302, a circular resonance polar plate 304 fixedly connected with the support cones 303 is arranged on the upper end face of the support cones 303, the whole fixed polar plate 302, the resonance polar plate 304 and a space between the resonance polar plate 304 and the fixed polar plate 302 form a capacitor body structure, when the resonance polar plate 304 generates a resonance effect, the plate surface of the whole resonance polar plate 304 protrudes outwards or sinks inwards, so that the distance between the resonance polar plate 304 and the fixed polar plate 302 is changed, the capacitance of the whole capacitor body is changed, and at the moment, a sensor can transmit a differential signal outwards;
the middle position of the bottom of the inner sphere 2 is provided with a guide hole I201, a cylindrical inner guide tube 4 fixedly connected with the guide hole I201 is arranged in the guide hole I201, a cylindrical outer guide tube 5 fixedly connected with the bottom of the inner sphere 2 is arranged on the outer side of the inner guide tube 4, the outer guide tube 5 is coaxial with the inner guide tube 4, a guide hole II 202 is arranged between the outer guide tube 5 and the inner guide tube 4 and on the wall body of the inner sphere 2, the outer guide tube 5 penetrates through the outer sphere 1 and is fixedly connected with the wall body of the outer sphere 1 into a whole, the outer guide tube 5 penetrates through the outer sphere 1 and then extends downwards with the inner guide tube 4 at equal intervals, the inner guide tube 4 and the outer guide tube 5 respectively collect the leads led out from the fixed pole plate 302 and the resonant pole plate 304 in groups, and classification.
Further, the upper end of the tube body 301 is fixedly connected with the detection hole 101, and the lower end of the tube body 301 passes through the fixing hole 203 and is fixedly connected with the fixing hole 203, so that the whole detection tube 3 is more stable.
Further, the fixed pole plate 302 is connected with the tube body 301 to form a sealed cavity structure at the bottom of the tube body 301, so that the whole probe tube 3 has better anti-interference capability.
Further, the supporting cones 303 are cone structures with large bottoms and small tops, and the supporting cones 303 are uniformly distributed along the circumference of the fixed pole plate 302, so that the bottom support of the whole resonance pole plate 304 is stable, the contact surface with the resonance pole plate is reduced, and the influence of the supporting cones 303 on the resonance effect of the resonance pole plate 304 is reduced.
Furthermore, the wall bodies of the outer sphere 1, the inner sphere 2, the detection tube 3, the inner guide tube 4 and the outer guide tube 5 are all formed by the sound-absorbing plate 6, the outer side of the sound-absorbing plate 6 is symmetrically provided with the absorbing plate 601, the core part of the sound-absorbing plate 6 is provided with the supporting plate 603, and the isolating plate 602 is symmetrically arranged between the supporting plate 603 and the absorbing plates 601 at two sides, so that the whole sensor has good sound-absorbing and sound-insulating anti-interference capability.
Furthermore, the absorption plate 601 is a plate body with a porous and loose structure, and can absorb and reduce the sound wave entering the detection tube 3 and contacting with the wall body 301, so that the whole noise reduction plate 6 has a good sound absorption effect, and the anti-interference capability of the whole sensor is improved.
Further, the supporting plate 603 is a plate body with a compact structure, so that the entire muffling wave 6 has a good function of isolating sound waves and a good function of supporting.
Further, the isolation plate 602 is a plate body with an elastic structure, and is used for damping, buffering and isolating the vibration effect generated by the sound wave transmitted from the inside of the probe tube 3 and the vibration of the resonant polar plate 304.
Further, the resonant pole plate 304 is a thin-wall plate structure, so that the resonant effect generated by the resonant pole plate 304 is better, the diameter of the resonant pole plate 304 is two millimeters smaller than that of the fixed pole plate 302, and the diameter of the fixed pole plate 302 is equal to the inner diameter of the tube body 301, so that the resonant pole plate 304 can resonate in the tube body 301 without interference.
The working state is as follows: the whole capacitance sensor is vertically placed in a hollow area, when sound waves are transmitted to the sensor, the sound waves enter a tube body 301 of a detection tube 3 from an orifice of a detection hole 101 in an outer sphere 1, when the sound waves reach a resonance polar plate 304 at the bottom of the tube body 301, the resonance polar plate 304 and the sound waves generate a resonance effect to vibrate up and down, when the resonance polar plate 304 vibrates up and down, the distance between a middle fixed polar plate 302 and the resonance polar plate 304 of a capacitance structure formed by the resonance polar plate 304, the fixed polar plate 302 and a gap between the resonance polar plate 304 and the fixed polar plate 302 changes, therefore, the capacitance changes, a differential signal is further sent outwards, and the action of positioning induction and feedback of the oriented sound waves is completed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A capacitive sensor, characterized by: comprises an outer sphere (1), an inner sphere (2) and a detection tube (3) arranged between the outer sphere (1) and the inner sphere (2);
the wall body of the outer sphere (1) is provided with uniformly distributed circular detection holes (101), the inner sphere (2) and the outer sphere (1) are concentric, a circular fixing hole (203) is formed in the wall body of the inner sphere (2) and at a position corresponding to the detection holes (101), and a detection tube (3) is sleeved between the fixing hole (203) and the detection holes (101);
the main body of the detection tube (3) is a cylindrical tube body (301), the upper end of the tube body (301) is fixedly connected with the detection hole (101), the lower end of the tube body (301) penetrates through the fixing hole (203) and is fixedly connected with the fixing hole (203), a circular fixed polar plate (302) is arranged at the bottom of the tube body (301), the fixed polar plate (302) is connected with the tube body (301) to enable the bottom of the tube body (301) to form a sealed cavity structure, four uniformly distributed support cones (303) are arranged at the upper end of the fixed polar plate (302), and a circular resonance polar plate (304) fixedly connected with the support cones (303) is arranged on the upper end face of each support cone (303);
the utility model discloses a ball-shaped structure, including interior spheroid (2), the intermediate position of interior spheroid (2) bottom is equipped with pilot hole I (201), be furnished with cylindrical inner catheter (4) together with pilot hole I (201) fixed connection in pilot hole I (201) endotheca, the outside of inner catheter (4) is equipped with the columniform outer catheter (5) with interior spheroid (2) bottom fixed connection, outer catheter (5) are coaxial with inner catheter (4), be equipped with pilot hole II (202) between outer catheter (5) and inner catheter (4) and on the wall body of interior spheroid (2), outer catheter (5) pass outer spheroid (1) and with the wall body fixed connection of outer spheroid (1) integrative, and outer catheter (5) pass outer spheroid (1) back and together carry out equidistance extension downwards with inner catheter (4).
2. A capacitive sensor according to claim 1, wherein: the supporting cones (303) are in a conical structure with a large bottom and a small top, and the supporting cones (303) are uniformly distributed and arranged along the circumference of the fixed pole plate (302).
3. A capacitive sensor according to claim 1, wherein: the wall body of the outer sphere (1), the inner sphere (2), the detection tube (3), the inner guide tube (4) and the outer guide tube (5) is composed of an anechoic plate (6), the outer side of the anechoic plate (6) is symmetrically provided with an absorption plate (601), the core part of the anechoic plate (6) is provided with a support plate (603), and a separation plate (602) is symmetrically arranged between the support plate (603) and the absorption plates (601) at the two sides.
4. A capacitive sensor according to claim 3, wherein: the absorption plate (601) is a plate body with a porous and loose structure.
5. A capacitive sensor according to claim 3, wherein: the supporting plate (603) is a plate body with a compact structure.
6. A capacitive sensor according to claim 3, wherein: the isolation plate (602) is a plate body with an elastic structure.
7. A capacitive sensor according to claim 1, wherein: the resonance polar plate (304) is of a thin-wall plate body structure, the diameter of the resonance polar plate (304) is two millimeters smaller than that of the fixed polar plate (302), and the diameter of the fixed polar plate (302) is equal to the inner diameter of the tube body (301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810049283.7A CN108415628B (en) | 2018-01-18 | 2018-01-18 | Capacitance sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810049283.7A CN108415628B (en) | 2018-01-18 | 2018-01-18 | Capacitance sensor |
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| Publication Number | Publication Date |
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| CN108415628A CN108415628A (en) | 2018-08-17 |
| CN108415628B true CN108415628B (en) | 2021-05-04 |
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| CN201175441Y (en) * | 2007-06-18 | 2009-01-07 | 王世明 | Ultrasonic massage comb with vibration |
| JP5237069B2 (en) * | 2008-12-05 | 2013-07-17 | 株式会社オーディオテクニカ | Omnidirectional condenser microphone unit and omnidirectional condenser microphone |
| CN107064306A (en) * | 2017-04-18 | 2017-08-18 | 微美光速资本投资管理（北京）有限公司 | A kind of ultrasound holography detection device and application method |
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