CN109752030A - A kind of patch type position-detection sensor - Google Patents
A kind of patch type position-detection sensor Download PDFInfo
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- CN109752030A CN109752030A CN201910127985.7A CN201910127985A CN109752030A CN 109752030 A CN109752030 A CN 109752030A CN 201910127985 A CN201910127985 A CN 201910127985A CN 109752030 A CN109752030 A CN 109752030A
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- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 239000012212 insulator Substances 0.000 claims description 23
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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Abstract
The present invention relates to a kind of patch type position-detection sensor, which includes graduated scale and reading head, it is characterised in that the fixed capacity being arranged in order on the graduated scale with n；Reading head includes a Mobile pole plate；When Mobile pole plate moves linearly from left to right with testee, variable capacitance successively is constituted with the right fixed polar plate of fixed capacity and the air dielectric of centre.The present invention occupies few space, while being not only able to satisfy plane survey, but also is able to satisfy measurement of curved surface.According to the sinusoidal signal amplitude detection testee position of measurement, it can be realized high precision position detection, significantly reduce testing cost, have a wide range of application.
Description
Technical field
The present invention relates to a kind of coding techniques, pressure swing techniques are incuded, in particular to a kind of location detecting technology.
Background technique
Location detecting technology is commonly used in kinetic control system.Sensor and measurement dress as detection change in location
It sets, is widely used in the fields such as military and space flight, aviation, navigation, industry, agricultural, plays the effect that can not be substituted.
Method for detecting position is divided into increment type and two kinds of absolute type.Increment type detection mode only measures displacement increment, every shifting
A dynamic measurement unit issues a measuring signal.Advantage is that detection device is fairly simple, and any point all can serve as to survey
Measure starting point.The disadvantage is that obtain moving distance will affect subsequent once counting is wrong by the counting for reading measuring signal
Measurement result.
Absolute value formula measurement method can be avoided disadvantages mentioned above, select a fixed zero point to make benchmark, any one quilt
Measuring point relative zero has a corresponding measured value.The resolution ratio of Measurement scales is higher, and the precision of measurement result is higher.By
It is limited in Measurement scales resolution ratio by processing technology, affects the raising of precision.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of patch type position-detection sensors, and the system structure is simple,
Flexibly, measurement accuracy is high and measurement result is accurate for control.
In order to solve the above-mentioned technical problem, patch type position-detection sensor of the invention includes graduated scale and reading head,
It is characterized in that the fixed capacity being arranged in order on the graduated scale with n；Reading head includes a Mobile pole plate；When
When Mobile pole plate moves linearly from left to right with testee, successively with the right fixed polar plate of each fixed capacity and centre air
Medium constitutes variable capacitance.
The reading head further includes a mobile insulator and a right pole plate of movement, and Mobile pole plate and movement are insulated
Body, mobile right pole plate collectively form mobile capacitor.
The graduated scale includes public left pole plate, public insulator, the n right fixed polar plates by linear sequence arrangement；n
A right fixed polar plate constitutes the n fixed capacities by linear sequence arrangement with public left pole plate and public insulator respectively.
The graduated scale includes public left pole plate, and public insulator, n are pressed the tactic right fixed polar plate of curve；n
A right fixed polar plate constitutes n with public left pole plate and public insulator respectively and presses the tactic fixed capacity of curve.
The graduated scale includes the support plate of strip, and n solid by the fixed left side on the supporting plate of linear sequence arrangement
Fixed plate and n by linear sequence arrangement insulator and n arrange right fixed polar plate by linear sequence and constitute n and press straight line
Tactic fixed capacity.
The graduated scale includes the support plate of strip, and n solid by the fixed left side on the supporting plate of curve sequence arrangement
Fixed plate and n by curve sequence arrangement insulator and n arrange right fixed polar plate by curve sequence and constitute n and press curve
Tactic fixed capacity.
In use, the left pole plate of fixed capacity is grounded, right pole plate is connected to the input terminal of signal processing circuit, Mobile pole plate or
It moves to right movable plate electrode and is connected to the output end that module occurs for sinusoidal signal；Mobile pole plate or mobile capacitor are fixed on testee
On.When testee is mobile, since area changes between plate between Mobile pole plate and corresponding right fixed polar plate, lead to phase
The capacitance for the variable capacitance answered changes, to realize the amplitude modulation of sinusoidal signal；Just according to the n output demarcated in advance
The positional relationship of string signal amplitude and Mobile pole plate or mobile capacitor, can be obtained the position data of testee.
Patch type position sensor of the invention can replace traditional optical element and groove code-disc, occupy few
Space, while it being not only able to satisfy plane survey, but also be able to satisfy measurement of curved surface.According to the sinusoidal signal amplitude detection testee of measurement
Position can be realized high precision position detection, significantly reduce testing cost, have a wide range of application.
Detailed description of the invention
Invention is further described in detail with reference to the accompanying drawings and detailed description.
Fig. 1 is overall structure perspective view of the invention.
Fig. 2 is the sectional view of the embodiment of the present invention 1.
Fig. 3 is the sectional view of the embodiment of the present invention 2.
Fig. 4 is the equivalent circuit diagram of the embodiment of the present invention 1,2.
Fig. 5 is the sectional view of the embodiment of the present invention 3.
Fig. 6 is the sectional view of the embodiment of the present invention 4.
Fig. 7 is the equivalent circuit diagram of the embodiment of the present invention 3,4.
Fig. 8 is using position detecting system structural block diagram of the invention.
Specific embodiment
Embodiment 1
As shown in Figure 1, patch type position-detection sensor of the invention includes graduated scale 1 and reading head 2.
As shown in Fig. 2, public left pole plate 11 and public insulator 12 and n of the graduated scale 1 including strip
By linear sequence arrangement right fixed polar plate 13-1,13-2 ... 13-n；N right fixed polar plate 13-1,13-2 ... 13-n
Constituted respectively with public left pole plate 11 and public insulator 12 n by linear sequence arrangement fixed capacity Cs1, Cs2 ...
Csn；The reading head 2 uses Mobile pole plate 21；When Mobile pole plate 21 moves linearly from left to right with testee, successively
With right fixed polar plate 13-1,13-2 ... 13-n and centre air dielectric constitute variable capacitance Ci1, Ci2 ... Cin；It is public
Left pole plate 11 is grounded altogether, right fixed polar plate 13-1,13-2 ... 13-n is connected to the input terminal of signal processing circuit, Mobile pole plate
21 are connected to the output end that module occurs for sinusoidal signal；Equivalent circuit is as shown in Figure 4.
Embodiment 2
As shown in Figure 1, patch type position-detection sensor of the invention includes graduated scale 1 and reading head 2；
As shown in figure 3, the graduated scale 1 includes the support plate 3 of strip, n are fixed on branch by linear sequence arrangement
Left fixed polar plate 11-1,11-2 on fagging 3 ..., 11-n and insulator 12-1,12-2 ... 12-n and right fixed pole
Plate 13-1,13-2 ... a fixed capacity Cs1, Cs2 arranged by linear sequence of the n that 13-n is constituted ... Csn；The reading
Use Mobile pole plate 21 for several 2；When Mobile pole plate 21 moves linearly from left to right with testee, successively with right fixed polar plate
13-1,13-2 ... the 13-n and air dielectric of centre composition variable capacitance Ci1, Ci2 ... Cin；Left fixed polar plate 11-1,
11-2 ... .11-n ground connection, right pole plate 13-1,13-2 ... 13-n is connected to the input terminal of signal processing circuit, Mobile pole plate
21 are connected to the output end that module occurs for sinusoidal signal；Equivalent circuit is as shown in Figure 4.
Embodiment 3
As shown in Figure 1, patch type position-detection sensor of the invention includes graduated scale 1 and reading head 2.
As shown in figure 5, the graduated scale 1 includes public left pole plate 11, public insulator 12, n are arranged by linear sequence
Right fixed polar plate 13-1,13-2 of column ... 13-n；N right fixed polar plate 13-1,13-2 ... 13-n respectively with a public left side
N fixed capacity Cs1, Cs2 arranged by linear sequence of pole plate 11 and the composition of public insulator 12 ... Csn；The reading
First 2 include that a Mobile pole plate 21, one mobile insulators 22 and a right pole plate 23 of movement, three collectively form mobile capacitor
Cmove；When Mobile pole plate 21 moves linearly from left to right with testee, successively with right fixed polar plate 13-1,13-2 ...
The 13-n and air dielectric of centre composition variable capacitance Ci1, Ci2 ... Cin；Public left pole plate 11 is grounded, right fixed polar plate
13-1,13-2 ... 13-n is connected to the input terminal of signal processing circuit, and Mobile pole plate 21 is connected to sinusoidal signal and module occurs
Output end, mobile right pole plate 23 are grounded；Equivalent circuit is as shown in Figure 7.
Embodiment 4
As shown in Figure 1, patch type position-detection sensor of the invention includes graduated scale 1 and reading head 2；.
As shown in fig. 6, the graduated scale 1 includes the support plate 3 of strip, n are fixed on branch by linear sequence arrangement
Left fixed polar plate 11-1,11-2 on fagging 3 ..., 11-n and insulator 12-1,12-2 ... 12-n and right fixed pole
Plate 13-1,13-2 ... n fixed capacity Cs1, Cs2 arranged by linear sequence of 13-n composition ... Csn；The reading
First 2 include that a Mobile pole plate 21, one mobile insulators 22 and a right pole plate 23 of movement, three collectively form mobile capacitor
Cmove；When Mobile pole plate 21 moves linearly from left to right with testee, successively with right fixed polar plate 13-1,13-2 ...
The 13-n and air dielectric of centre composition variable capacitance Ci1, Ci2 ... Cin；Left fixed polar plate 11-1,11-2 ... .11-n
Ground connection, right fixed polar plate 13-1,13-2 ... 13-n is connected to the input terminal of signal processing circuit, and Mobile pole plate 21 is connected to just
The output end of module occurs for string signal, and mobile right pole plate 23 is grounded；Equivalent circuit is as shown in Figure 7.
The present invention is not limited to the above embodiments, n fixed capacity Cs1, Cs2 ... Csn can also by circular curve or
The sequence such as any other full curve arranges, for measuring position of the object along curve movement.
As shown in figure 8, module occurs for sinusoidal signal by the power module that is cascaded, LC oscillating circuit and voltage follower
It constitutes, is prior art construction；Sinusoidal signal occurs the sinusoidal signal load that module generates and passes in patch type position of the invention
On sensor, patch type position sensor exports n sinusoidal signal, this n sinusoidal signal is through the high-speed a/d in signal processing circuit
Converter is converted to digital signal, then after FPGA module calculation process, can change to obtain according to the amplitude of n sinusoidal signal
The position data of testee.
Power module provides lasting, steady using 24V direct-flow voltage regulation source, predominantly LC oscillating circuit, voltage follower
Fixed voltage.
LC oscillating circuit, for generating the sine wave signal of the higher-order of oscillation.
Voltage follower is the common-collector circuit being made of triode 2N3393, for improving circuit carrying load ability.
High-speed a/d converter, using the ADS5263 chip of TI, for converting modulated analog sinus signals
For digital signal, then it is transferred to FPGA module.
FPGA module is obtained using the EP3C40 chip of Altera for calculating the digital signal of acquisition
Position measurement.
Claims (6)
1. a kind of patch type position-detection sensor, including graduated scale (1) and reading head (2), it is characterised in that the scale
The fixed capacities (Cs1) that are arranged in order on ruler (1) with n, (Cs2) ... (Csn)；Reading head (2) includes a movement
Pole plate (21)；When Mobile pole plate (21) moves linearly from left to right with testee, successively with fixed capacity (Cs1),
(Cs2) ... the right fixed polar plate (13-1) of (Csn), (13-2) ... (13-n) and centre air dielectric composition can power transformation
Hold (Ci1), (Ci2) ... (Cin).
2. patch type position-detection sensor according to claim 1, it is characterised in that the reading head (2) further includes
One mobile insulator (22) and the right pole plate (23) of a movement, Mobile pole plate (21) and mobile insulator (22), mobile right pole
Plate (23) collectively forms mobile capacitor (Cmove).
3. patch type position-detection sensor according to claim 1 or 2, it is characterised in that graduated scale (1) packet
Include public left pole plate (11), public insulator (12), n right fixed polar plate (13-1), (13- by linear sequence arrangement
2),……(13-n)；N right fixed polar plates (13-1), (13-2) ... (13-n) respectively with public left pole plate (11) and public
N fixed capacities (Cs1) (Cs2) arranged by linear sequence of insulator (12) composition ... (Csn).
4. patch type position-detection sensor according to claim 1 or 2, it is characterised in that graduated scale (1) packet
Public left pole plate (11) is included, public insulator (12), n are pressed the tactic right fixed polar plate (13-1) of curve, (13-
2),……(13-n)；N right fixed polar plates (13-1), (13-2) ... (13-n) respectively with public left pole plate (11) and public
Insulator (12) constitute n by the tactic fixed capacity of curve (Cs1), (Cs2) ... (Csn).
5. patch type position-detection sensor according to claim 1 or 2, it is characterised in that graduated scale (1) packet
The support plate (3) of strip is included, n are arranged left fixed polar plate (11-1), (11- being fixed on support plate (3) by linear sequence
2) ..., (11-n) and n are a a by straight line by linear sequence arrangement insulator (12-1), (12-2) ... (12-n) and n
Sequence arrange right fixed polar plate (13-1), (13-2) ... (13-n) constitutes n by the fixed capacities of linear sequence arrangement
(Cs1)、(Cs2)、……(Csn)。
6. patch type position-detection sensor according to claim 1 or 2, it is characterised in that graduated scale (1) packet
The support plate (3) of strip is included, n are arranged left fixed polar plate (11-1), (11- being fixed on support plate (3) by curve sequence
2) ..., (11-n) and n are a a by curve by curve sequence arrangement insulator (12-1), (12-2) ... (12-n) and n
Sequence arrange right fixed polar plate (13-1), (13-2) ... (13-n) constitutes n by the tactic fixed capacity of curve
(Cs1、)(Cs2)、……(Csn)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910127985.7A CN109752030A (en) | 2019-02-21 | 2019-02-21 | A kind of patch type position-detection sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910127985.7A CN109752030A (en) | 2019-02-21 | 2019-02-21 | A kind of patch type position-detection sensor |
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| Publication Number | Publication Date |
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| CN109752030A true CN109752030A (en) | 2019-05-14 |
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| CN201910127985.7A Pending CN109752030A (en) | 2019-02-21 | 2019-02-21 | A kind of patch type position-detection sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873916A (en) * | 1972-09-07 | 1975-03-25 | Maag Zahnraeder & Maschinen Ag | Capacitive sensor for measuring displacement or position |
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| CN102288100A (en) * | 2011-06-01 | 2011-12-21 | 重庆理工大学 | Time grating linear displacement sensor based on alternating electric field |
| CN103868442A (en) * | 2012-12-12 | 2014-06-18 | 王祖斌 | Differential capacitance displacement conversion and subdivision method and capacitive linear displacement measuring system |
| CN103913589A (en) * | 2014-01-03 | 2014-07-09 | 杨文庆 | Rotating speed sensor |
| CN108362206A (en) * | 2018-02-13 | 2018-08-03 | 江门市银象科技有限公司 | A kind of non-contact displacement transducer based on capacitive grating |
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| CN109341744A (en) * | 2018-12-03 | 2019-02-15 | 华中科技大学 | A kind of detection device of variable area formula displacement-capacitance |
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2019
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Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3873916A (en) * | 1972-09-07 | 1975-03-25 | Maag Zahnraeder & Maschinen Ag | Capacitive sensor for measuring displacement or position |
| CN1066121A (en) * | 1991-04-25 | 1992-11-11 | 海德罗-格伯 | Utilize capacitive transducer to displacement or specific inductive capacity carry out dynamically and non-cpntact measurement |
| CN1084268A (en) * | 1992-06-26 | 1994-03-23 | 株式会社三丰 | The capacitive type measurement utensil that is used for the measurement of absolute position |
| CN1123404A (en) * | 1994-11-10 | 1996-05-29 | 霍斯特塞德尔两合公司 | Method and device for determining the respective geometrical position of a body |
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| CN102288100A (en) * | 2011-06-01 | 2011-12-21 | 重庆理工大学 | Time grating linear displacement sensor based on alternating electric field |
| CN103868442A (en) * | 2012-12-12 | 2014-06-18 | 王祖斌 | Differential capacitance displacement conversion and subdivision method and capacitive linear displacement measuring system |
| CN103913589A (en) * | 2014-01-03 | 2014-07-09 | 杨文庆 | Rotating speed sensor |
| CN108387167A (en) * | 2017-02-02 | 2018-08-10 | 株式会社三丰 | Displacement detector |
| CN108362206A (en) * | 2018-02-13 | 2018-08-03 | 江门市银象科技有限公司 | A kind of non-contact displacement transducer based on capacitive grating |
| CN109341744A (en) * | 2018-12-03 | 2019-02-15 | 华中科技大学 | A kind of detection device of variable area formula displacement-capacitance |
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