CN87207399U - Condenser type angular displacement sensor - Google Patents
Condenser type angular displacement sensor Download PDFInfo
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- CN87207399U CN87207399U CN 87207399 CN87207399U CN87207399U CN 87207399 U CN87207399 U CN 87207399U CN 87207399 CN87207399 CN 87207399 CN 87207399 U CN87207399 U CN 87207399U CN 87207399 U CN87207399 U CN 87207399U
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Abstract
The utility model relates to a condenser type angular displacement sensor which is formed by that the condenser system comprises two concentric cylinders, the condenser system is adapted to integrated circuits and displayers of existing condenser type electronic digital display calipers, and the relative angle displacement of the two cylinders can be translated to electrical pulses which can be counted and displayed. The digital display system of the utility model is formed by directly adopting the connection of the special integrated circuits and the displayers of the existing commercial electronic digital display calipers. So the utility model can keep high precision and high resolution with low cost, and screw measurers can also be inserted and electronic digital display is realized. The utility model has the advantages of simple structure, and small size, in particular to small radial size, etc.
Description
The utility model relates to a kind of angular displacement sensor, is a kind of angular displacement sensor that can use the realization electronic digital display on the spiral micrometer measuring implement.
Existing spiral micrometer measuring implement need add the relative angular displacement digitizing that a kind of small-sized angular displacement sensor is paid micrometer screw.Do not influence considering suitably to increase the measurer size and to make the spiral micrometer measuring implement realize that numeral shows under the portable condition.Existing angular displacement sensor has known round grating, and round induction synchrometer and code-wheel etc. all because of itself being difficult for miniaturization, or because of its adaptive circuit is difficult for miniaturization, are used and be difficult on the spiral micrometer measuring implement.
A kind of known method is arranged, promptly straight-line displacement is converted to corresponding electric pulse by a capacitor system by electronic circuit, behind counting, give numeral and show.Produced digimatic calipers in this way, its special IC is commercialization also.But because of the capacitor system of straight-line displacement can not directly append on the spiral micrometer measuring implement.
The purpose of this utility model provides a kind of small-sized capacitive angular sensor, can be attached on the spiral micrometer measuring implement easily, and do not influence the portability of measurer, and directly utilize the special IC of digimatic calipers to make the spiral micrometer measuring implement realize digital displayization with very low cost.
The utility model is achieved in that it is made up of the (see figure 1) of concentric drums in relative rotation of two equal in length.On the aspectant surface of two cylinders, arrange electrode, constitute capacitor system as shown in Figure 2.Stationary cylinder b(inner cylinder) outside surface is arranged emitting electrode E and output electrode O, is separated by earthing pole G between emitting electrode and output electrode; Rotor a(out cylinder) inside surface is arranged receiving electrode C and earthing pole G.Emitting electrode E is uniform along circumferential surface, and every group is 8, and one group or several groups (among the figure being 1 group) can be set; The piece number of receiving electrode C and the group number of emitting electrode equate (among the figure being 1), and be uniform along circumferential surface, every topped 4 emitting electrodes just that occupy, and all the other are earthing pole.The arrangement form that two groups of emitting electrodes are set is shown in Fig. 3.
Several groups of corresponding pole plates of emitting electrode are together in parallel, and are connected to electronic circuit, respectively it are applied the constant amplitude square driving voltage that the adjacent phase difference is π/4 by electronic circuit.By the capacitance group of emitting electrode and receiving electrode, make the composite signal that produces an alternation on the receiving electrode.This composite signal is coupled to electronic circuit by the capacitance group that receiving electrode and output electrode constitute.The electrode connection figure (see figure 4) of sensor, the oscillogram on each electrode of sensor as shown in Figure 5.
When rotor has angular displacement, be received the topped emitting electrode of electrode changes thereupon, composite signal just produces and the proportional phase shift of angular displacement, revolution is crossed one group of emitting electrode, the phase shift of composite signal is 2 π, the relation of having only angular displacement in the sensor of one group of emitting electrode and composite signal phase shift α as shown in Figure 6, the vector among the figure is the vector of composite signal first-harmonic.
Composite signal is coupled to phase identification of circuit by output electrode and detects its phase shift, and presses the continuously even interpolation n electric pulse of per 2 π phase shifts by the interpolation circuit, and the counting circuit counting is sent in the interpolation pulse simultaneously, so just makes the angular displacement digitizing.For the sensor that has only one group of emitting electrode, angular displacement and phase shift equate that rotating a circle just has n electric pulse, and promptly numeral is shown as n.The integrated circuit of existing digimatic calipers special use can produce two kinds of interpolation pulses, and a kind of is n=400, and another kind is n=508, is respectively applied for made in Great Britain the measurement and the metric system measurement.The angular displacement sensor that provides as the utility model utilizes the digimatic calipers special IC, adopts one group of emitting electrode, and revolution can obtain 400 segmentations or 508 segmentations; Adopt two groups of emitting electrodes, revolution can obtain 800 segmentations or 1016 segmentations, and the rest may be inferred.
Characteristics of the present utility model and effect, general sensor is for guaranteeing its resolution and precision, each electrode all must have the quite size of size, but distribution electrode just can be made less radial dimension on drum surface, and this is crucial to portable spiral micrometer measuring implement.
Concentric cylindrical structure of the present utility model is consistent with the version that micrometer screw is paid, and is convenient to use on the spiral micrometer measuring implement, does not make whole spiral micrometer system structure complicated.
The utility model is owing to directly adopting existing commercial digimatic calipers special IC to connect to form the electronic digital display system, and institute can realize digital displayization easily so that the spiral micrometer measuring implement does not increase too large scale.
Based on above-mentioned feature, the utlity model has simple in structure, volume is little, particularly radial dimension is little, the spiral micrometer measuring implement that is easy to pack into utilizes existing small circuit, can be with lower cost, keep high precision and high resolving power, can make existing spiral micrometer measuring implement realize that electron number is clear again.
Structural principle of the present utility model and typical embodiment are provided by following accompanying drawing:
Fig. 1 is the structural representation of out cylinder (a) and inner cylinder (b).
Fig. 2 arranges the capacitor system figure that electrode constitutes on the face-to-face surface of two cylinders.
Fig. 3 is the arrangement of electrodes form figure that 2 groups of emitting electrodes are set.
Fig. 4 is the electrode connection figure of sensor.
Fig. 5 is the oscillogram on each electrode of sensor.
Fig. 6 is the graph of a relation that has only angular displacement and composite signal angle of phase displacement α in the sensor of one group of emitting electrode.
Fig. 7 is the structural representation of lengthening rotor.
Fig. 8 shows the sensor construction figure of the additional rotor of milscale for electronics.
As can be seen from Figure 7, modification of the present utility model can be done rotor longlyer than stationary cylinder, and the screw coaxial that rotor and micrometer screw are paid is fixed, rotor just can simultaneously rotate one side with screw rod and move vertically, and above-mentioned functions does not have any change.One-piece construction is more simplified.
Find out from electronic digital display micrometer shown in Figure 8, on milscale chi frame, installed the capacitive angular sensor of one group of emitting electrode additional, it by two equal in length in relative rotation concentric drums form.The one, stationary cylinder (inner cylinder), the 2nd, rotor (out cylinder).On the outside surface of stationary cylinder, be furnished with 8 every group emitting electrode E and output electrode O being uniformly distributed along the circumference, separate by earthing pole G between emitting electrode and the output electrode.Be furnished with the receiving electrode C that is uniformly distributed along the circumference on the inside surface of rotor, its piece number and emitting electrode E group number is identical, the topped 4 emitting electrode E just that occupy of institute.Inner cylinder is fixed in the milscale chi frame, and out cylinder is connected with groove on the micrometric screw by trundle, and micrometric screw rotates and drives out cylinder and do rotation relatively with respect to inner cylinder during measurement.8 emitting electrodes are connected to lead on the pin of integrated circuit and accept driving voltage, and output electrode is connected on the corresponding pin composite signal is coupled in the circuit with lead too and goes.Micrometric screw rotates a week, drives out cylinder and also rotates a circle, and 2 π phase shifts just appear in composite signal.Adopt the integrated circuit and the display of existing digimatic calipers, 2 π phase shifts can interpolation 508 and 400 electric pulses, and therefore, it is 0.508mm that screw design becomes pitch, and the demonstration least unit that makes electronic digital display micrometer is 0.001mm or 0.00005 inch.This electronic digital display micrometer has optional position zero setting function, and metric and English translation function and reading keep function.
If improve the segmentation number of digimatic calipers circuit, make 500 electric pulses of per 2 π phase shift interpolations, then can keep the micrometric screw that original pitch is 0.5mm, make the demonstration least unit of milscale still be 0.001mm.
In sum, the utility model can also be implemented at micrometer caliper, inside micrometer, other spiral micrometer and indexing means except implementing in above-mentioned micrometer, and it is clear to make it electron number.
Claims (2)
1, a kind of capacitive angular sensor, it comprises integrated circuit and display, it is characterized in that by two equal in length in relative rotation concentric drums form, be furnished with every group of being uniformly distributed along the circumference on the outside surface of stationary cylinder b inner cylinder and be 8 one group or several groups of emitting electrode E, and layout output electrode O, between emitting electrode and output electrode, separate by earthing pole G, be furnished with the receiving electrode C that is uniformly distributed along the circumference on the inside surface of rotor a out cylinder, its piece number is identical with emitting electrode E group number, the just topped 4 emitting electrode E that occupy of institute separate with onesize earthing pole between receiving electrode.
2, capacitive angular sensor according to claim 1 is characterized in that the length of rotor is longer than the length of stationary cylinder, and rotor is coaxial fixing with micrometric screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87207399 CN87207399U (en) | 1987-08-14 | 1987-08-14 | Condenser type angular displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87207399 CN87207399U (en) | 1987-08-14 | 1987-08-14 | Condenser type angular displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87207399U true CN87207399U (en) | 1988-04-20 |
Family
ID=4822842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87207399 Withdrawn CN87207399U (en) | 1987-08-14 | 1987-08-14 | Condenser type angular displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87207399U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106796121A (en) * | 2014-10-07 | 2017-05-31 | 斯沃奇集团研究和开发有限公司 | By when based on set bar position sensor |
| CN106931873A (en) * | 2015-12-29 | 2017-07-07 | 河北长孚电气设备有限公司 | Capacitive grid numeral display direct-reading index plate |
| CN111050636A (en) * | 2017-09-01 | 2020-04-21 | 雀巢产品有限公司 | Heart rate detection device and related systems and methods |
| CN115494126A (en) * | 2022-09-16 | 2022-12-20 | 西北工业大学 | Circumferential fixed-moving combined type capacitive sensor and coding positioning method |
-
1987
- 1987-08-14 CN CN 87207399 patent/CN87207399U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106796121A (en) * | 2014-10-07 | 2017-05-31 | 斯沃奇集团研究和开发有限公司 | By when based on set bar position sensor |
| CN106796121B (en) * | 2014-10-07 | 2019-10-15 | 斯沃奇集团研究和开发有限公司 | By when based on set bar position sensor |
| CN106931873A (en) * | 2015-12-29 | 2017-07-07 | 河北长孚电气设备有限公司 | Capacitive grid numeral display direct-reading index plate |
| CN111050636A (en) * | 2017-09-01 | 2020-04-21 | 雀巢产品有限公司 | Heart rate detection device and related systems and methods |
| CN115494126A (en) * | 2022-09-16 | 2022-12-20 | 西北工业大学 | Circumferential fixed-moving combined type capacitive sensor and coding positioning method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |