CN1439861A - Water proof electronic digital display callipers - Google Patents
Water proof electronic digital display callipers Download PDFInfo
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- CN1439861A CN1439861A CN 03115904 CN03115904A CN1439861A CN 1439861 A CN1439861 A CN 1439861A CN 03115904 CN03115904 CN 03115904 CN 03115904 A CN03115904 A CN 03115904A CN 1439861 A CN1439861 A CN 1439861A
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Abstract
A water-proof electronic caliber rule with digital indication is composed of displacement measuring device consisting of electric eddy sensors, metallic reflectors uniformly arranged on fixed rule by a certain wavelength, and several sensor coils installed on moving rule by a particular pitch. When an alternative current flows through said coils, an alternative magnetic field is generated in space to generate an electric eddy on said reflector. When fixed and moving rules move relatively, the magnetic field is modulated under the action of electric eddy, so measuring displacement value.
Description
Technical field:
The present invention relates to a kind of waterproof type electronic digital display calliper, is one of conventional indispensable instrument of departments such as machining, metrology and measurement, online detection, the examination and test of products, belongs to the surveying instrument technical field.
Background technology:
Digimatic calipers is the widely used a kind of measurer of industrial circle.Traditional digimatic calipers has series of advantages such as stable performance, easy to use, cheap, stream time be long, but there are a significant disadvantages and deficiency simultaneously: when there is liquid in environment for use, the slide calliper rule displayed value will occur than large deviation, even basic cisco unity malfunction.This defective has influenced the use of digimatic calipers at the production and processing scene to a great extent, has limited digital display calliper further applying at other field.
At present release the digimatic calipers that some have water-proof function successively both at home and abroad, can be divided into following four kinds of forms basically:
(1) utilize Sealing Technology to realize waterproof: these class methods mainly are by various seal approach, stop liquid to enter sensor internal, thereby realization water-proof function, as " absolute-type capacitive electrode caliper " (Chinese invention patent, application number 96104062), " Capacitive Digital Display Vernier Callipers " (Chinese invention patent, application number 98116518) etc. introduce.Because this does not have water-proof function sensor on principle, therefore this slide calliper rule do not belong to waterproof slide calliper rule truly.
(2) utilize coating to realize waterproof: these class methods mainly are to plate the special coating of one deck by the electrode surface at original capacitor grid transducer, thereby realization water-proof function, introduce as " reducing the dielectric capping layers of capacitive position sensor " (Chinese invention patent, application number 94115304) the pollutant sensitivity.Because sensor remains capacitive transducer, this does not have water-proof function on principle, and therefore this slide calliper rule do not belong to waterproof slide calliper rule truly.
(3) utilize inductance sensor to realize waterproof: these class methods mainly are to adopt special inductance sensor to realize measuring, promptly utilize drive coil in electric conductor, to produce the output signal that current vortex influences inductive coil, thereby the realization displacement measurement is as " induced current position transducer " of Japanese three envelope Co., Ltd. (application for a patent for invention number 96108034), " electronic caliper of using low power inductive position transducer " (application for a patent for invention number 971115850), the high accuracy induced current position transducer of deviation " reduce " (applications for a patent for invention number 98106179) etc. are introduced.This class sensor has the function of waterproof and dust and ferromagnetic particle on principle, can thoroughly solve waterproof problem, is one of desirable waterproof slide calliper rule formation scheme.Shortcoming is that power consumption is big, must adopt pulsed gap power supply mode ability practicability, and size sensor is bigger.
(4) utilize the magnetic-type sensor to realize waterproof: these class methods mainly are to adopt various magnetic-type sensors to realize displacement measurements, such as " portable precision electronic calliper " (application for a patent for invention number 97182164), " measuring the magnetoresistive transducer of yardstick " (application for a patent for invention number 98107990) introduction.This class sensor has water-proof function on principle, can thoroughly solve waterproof problem, but still to ferromagnetic particle and dust sensitivity.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, a kind of new waterproof type digimatic calipers is proposed, basic function, size, the precision of it and conditional electronic digital display calliper are suitable with the power consumption performance, and have a real water-proof function, with the industry spot that satisfies various complexity and the request for utilization of daily life.
For realizing such purpose, the present invention adopts current vortex sensor to form displacement detection device, on scale, install have certain regular shape, according to the evenly distributed metallic reflection conductor of certain wavelength period, on moving chi, several are installed and have the cell winding of specific distance and shape.When passing to exchange current in the coil, will produce alternating electromagnetic field in the space, and on the reflection conductor of scale, produce current vortex.When generation between scale and the moving chi relatively moves, under the effect of current vortex, magnetic field is produced modulating action, realize displacement measurement thus, have water-proof function simultaneously.
Waterproof digital display calliper of the present invention has the primary structure of conventional digital display calliper, comprises a scale, a moving chi (or claiming slide rule), cell winding, driving circuit and control circuit etc.Moving chi moves and realizes displacement measurement along scale.On scale according to the evenly distributed metallic reflection conductor of certain wavelength period.These reflection conductors have certain regular shape, for example rectangle, square, rhombus, triangle, sinusoidal or the like.Simultaneously, these reflection conductors can have the form of a plurality of code channels, and the mutual alignment of reflection conductor on the slide calliper rule moving direction on the different code channels can be in full accord, and certain intervals also can stagger.
The cell winding of installing on the moving chi is evenly distributed along the slide calliper rule moving direction, its at interval with scale on the distribution wavelength of reflection conductor have definite corresponding relation.These cell windings can be distributed on a plurality of parallel code channels, and how much consistent with the code channel number of scale the code channel number purpose is.The mutual alignment of coil on the slide calliper rule moving direction on the different code channels can be in full accord, the certain intervals that also can stagger, and have definite corresponding relation with the reflection conductor of scale.The wavelength of each code channel can be consistent, also can be slightly different, thus can constitute different measurement patterns, reach different measurement requirement and purposes.
The sensor coil is to work under the driving of driving circuit and control.These cell windings are transmitting coils, and alternating current is passed through in the inside, thereby form alternation at the coil surrounding space.Because partial reflection conductor above the scale will be in the zone of action of this alternating magnetic field, therefore in these reflection conductors, will produce current vortex, and conversely the electrical quantity of transmitting coil be exerted an influence.And cell winding is a receiving coil simultaneously, and it can be experienced from the eddy current effect in these reflection conductors, makes the inductance of coil itself change, and causes the frequency of driving circuit oscillator and amplitude to change.After generation between moving chi and the scale relatively moved, cell winding changed with the relative position of reflection conductor, and the frequency of the electric signal of output and amplitude also respective synchronization change, thereby can realize displacement measurement.Because this electric vortex type displacement sensor is the influence of liquid body medium and magnetisable material not, therefore can realize water-proof function.
Because the reflection conductor on the scale is equally distributed, therefore, along with moving chi is different with the position between the scale, output signal frequency becomes cyclical variation.Simultaneously, to measure sensitivity in order improving, to reduce gap variation between scale and the moving chi, generally adopt two coils at a distance of 1/2 wavelength to the influence of measurement result, thus realization difference structure pattern.For the ease of the installation and the layout of cell winding, the distance of two differential windings also can be arranged to 1/2 wavelength, 3/2 wavelength, 5/2 wavelength or the like.
Therefore cell winding can utilize the manufacturing of multilayer printed circuit board technology, has process stabilizing, advantage such as inexpensive, quick, stable.Simultaneously, cell winding and driving circuit, control circuit, communication interface etc. can be produced on the same circuit board, thereby reduce the volume and the reliability of whole measurement module greatly, reduce cost, improve maintainable.
The present invention adopts pulse interval formula power supply mode to provide the energy for cell winding, and the power supply duty of ratio is very little, therefore can reduce power consumption to greatest extent, extends working time.
The present invention adopts Single Chip Microcomputer (SCM) system to carry out the collection of driving circuit control, sensor output signal and conversion, data processing, error compensation and correction, numerical evaluation, demonstration as a result etc.
Adopt low power consumption liquid crystal display, meet overview and operating habit, have the metric system/English system simultaneously and show functions such as conversion, energy-conservation (regularly turn-offing), zero clearing.
Similar with the conventional electrical digital display calliper, digimatic calipers of the present invention has general communication interface (being generally serial RS-232c interface), therefore can be connected with PC, printer or other equipment easily, carry out data transmission, statistical study, print result and form etc.
Power supply adopts little, the capacious lithium battery of volume, can satisfy the long-continued need of work of slide calliper rule, and the while is compliance with environmental protection requirements again.
The present invention adopts eddy current displacement sensor, really realized the water-proof function of digimatic calipers, the problems such as processing site that traditional digital display calliper can not be used to have liquid medium have thoroughly been solved, the request for utilization of industry spot, process, field work and various complexity and special occasions can be satisfied, the influence of various liquid and magnetisable material can be avoided measuring.Adopt many code channels to measure form, can realize the absolute measurement of slide calliper rule position, do not lose number, and can guarantee high orientation precision.
Waterproof type electronic digital display calliper of the present invention equally also can be used to realize other length and measurement of angle utensil, for example water proof type height gauge, waterproof digital display dial gauge, waterproof digital display centimeter, waterproof digital display dial gauge etc.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Among the figure, 1 is scale, and 2 are the reflection conductor, and 3 is driving circuit, and 4 is cell winding, and 5 is control circuit, and 6 are moving chi.
Embodiment:
Below in conjunction with accompanying drawing technical scheme of the present invention is further described.
As shown in Figure 1, the present invention includes a scale 1, moving chi 6, some cell windings 4, driving circuit 3, control circuit 5, display, communication interface, button, dry cell etc.Driving circuit 3 comprises driver and pulsing circuit, and control circuit 5 comprises single-chip microcomputer, controller, sampling thief, display circuit and communication interface, interface circuit.On scale 1 along the scale moving direction evenly distributed a series of metallic reflection conductors 2 with regular shape; Moving chi 6 is installed on the scale by physical construction, and can slide along the scale blade; Several current vortex sensor coils 4 are installed on moving chi 6, and these cell windings 4 are evenly distributed along the slide calliper rule moving direction, its at interval with scale on the distribution wavelength of metallic reflection conductor 2 have definite corresponding relation.Cell winding 4 links to each other with pulsing circuit by driver, the output of cell winding 4 is connected with single-chip microcomputer through sampling thief, the output of single-chip microcomputer connects display through display circuit, connect pulsing circuit by controller, be connected with external unit by communication interface, and link to each other with button by interface circuit.Driving circuit 3, control circuit 5 and display all link to each other with dry cell.
Driver is by the pulsing circuit intermittent power supply, for cell winding 4 provides pumping signal, the output electric signal of cell winding 4 carries out data processing and calculating through sending into single-chip microcomputer behind the sampling thief, and The ultimate results is delivered to display by display circuit and carried out the numeral demonstration; Single-chip microcomputer comes the gating pulse circuit by controller, realizes intermittent power supply; Single-chip microcomputer is by communicating circuit and external unit (for example host computer, printer, other-end etc.) transmission data; Single-chip microcomputer reads button by interface circuit, carries out corresponding operating and realizes difference in functionality; Driving circuit 3, control circuit 5 and display are kept system works by the unified power supply of dry cell.
The sensor coil 4 is worked under the driving of driving circuit 3 and control.These cell windings 4 are transmitting coils, and alternating current is passed through in the inside, thereby form alternation at the coil surrounding space.Because the partial reflection conductor 2 above the scale 1 will be in the zone of action of this alternating magnetic field, therefore in these reflection conductors 2, will produce current vortex, and conversely the electrical quantity of transmitting coil be exerted an influence.And cell winding 4 is a receiving coil simultaneously, and it can be experienced from the eddy current effect in these reflection conductors, makes the inductance of coil itself change, thereby causes the frequency of driving circuit oscillator and amplitude to change, and with this variable signal output.After generation between moving chi 6 and the scale 1 relatively moved, cell winding 4 changed with the relative position of reflection conductor 2, and the frequency of the electric signal of output and amplitude also respective synchronization change, thereby can realize displacement measurement.
Because the reflection conductor 2 on the scale 1 is equally distributed, therefore, along with moving chi 6 is different with the position between the scale 1, output signal frequency becomes cyclical variation, and its period of change equals to measure wavelength.
Cell winding 4 of the present invention is produced on the same circuit board with driving circuit 3, control circuit 5, communication interface etc., adopt pulse interval formula power supply mode to provide the energy for cell winding, adopt Single Chip Microcomputer (SCM) system to control, adopt low power consumption liquid crystal display, and has a general communication interface, compact conformation, reliable operation, continuous working for a long time.
Claims (5)
1, a kind of waterproof type electronic digital display calliper, comprise scale (1), moving chi (6), cell winding (4), driving circuit (3) and control circuit (5), it is characterized in that going up according to the evenly distributed metallic reflection conductor (2) of certain wavelength period with regular shape at scale (1), go up sensor installation coil (4) at moving chi (6), cell winding (4) is evenly distributed along the slide calliper rule moving direction, its interval has definite corresponding relation with the distribution wavelength of metallic reflection conductor (2), cell winding (4) links to each other with pulsing circuit by driver, the output of cell winding (4) is connected with single-chip microcomputer through sampling thief, the output of single-chip microcomputer connects display through display circuit, connect pulsing circuit by controller, be connected with external unit by communication interface, and link to each other driving circuit (3) with button by interface circuit, control circuit (5) all links to each other with dry cell with display.
2,, it is characterized in that metallic reflection conductor (2) is rectangle, square, rhombus or triangle as the said waterproof type electronic digital display calliper of claim 1.
3,, it is characterized in that metallic reflection conductor (2) has a plurality of code channels, the in full accord or certain intervals that staggers in the mutual alignment of metallic reflection conductor (2) on the slide calliper rule moving direction on the different code channels as claim 1 or 2 said waterproof type electronic digital display callipers.
4, as the said waterproof type electronic digital display calliper of claim 1, it is characterized in that cell winding (4) is distributed on a plurality of code channels, the code channel number is consistent with the code channel number of scale, the in full accord or certain intervals that staggers in the mutual alignment of coil on the slide calliper rule moving direction on the different code channels, and have definite corresponding relation with metallic reflection conductor (2).
5, as the said waterproof type electronic digital display calliper of claim 1, it is characterized in that cell winding (4) is connected into differential output form, the distance of two differential windings is arranged to 1/2 wavelength, 3/2 wavelength or 5/2 wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031159044A CN1180219C (en) | 2003-03-20 | 2003-03-20 | Water proof electronic digital display callipers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031159044A CN1180219C (en) | 2003-03-20 | 2003-03-20 | Water proof electronic digital display callipers |
Publications (2)
| Publication Number | Publication Date |
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| CN1439861A true CN1439861A (en) | 2003-09-03 |
| CN1180219C CN1180219C (en) | 2004-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031159044A Expired - Fee Related CN1180219C (en) | 2003-03-20 | 2003-03-20 | Water proof electronic digital display callipers |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386592C (en) * | 2003-12-19 | 2008-05-07 | 上海交通大学 | Long measuring range displacement sensor with waterproof function |
| CN102426811A (en) * | 2011-10-28 | 2012-04-25 | 华北电力大学（保定） | Potential difference meter experimental apparatus |
| CN103322898A (en) * | 2013-06-05 | 2013-09-25 | 上海交通大学 | Eddy current grating sensor with self-calibration function and self-calibration method |
| CN106767366A (en) * | 2016-12-05 | 2017-05-31 | 上海砺晟光电技术有限公司 | Full digital vortex gate sensor based on micro-coil |
| CN109841136A (en) * | 2019-01-11 | 2019-06-04 | 挪度医疗器械（苏州）有限公司 | A kind of chest compression system |
| CN110530250A (en) * | 2019-09-24 | 2019-12-03 | 天津捷力自动化设备有限公司 | A kind of novel sense grid and its working method for displacement measurement |
| WO2020207000A1 (en) * | 2019-04-11 | 2020-10-15 | 郝佳 | Inductive position measuring sensor |
| CN112729089A (en) * | 2020-12-28 | 2021-04-30 | 无锡广联数字传感科技有限公司 | Displacement sensor applied to multiple occasions |
-
2003
- 2003-03-20 CN CNB031159044A patent/CN1180219C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386592C (en) * | 2003-12-19 | 2008-05-07 | 上海交通大学 | Long measuring range displacement sensor with waterproof function |
| CN102426811A (en) * | 2011-10-28 | 2012-04-25 | 华北电力大学（保定） | Potential difference meter experimental apparatus |
| CN103322898A (en) * | 2013-06-05 | 2013-09-25 | 上海交通大学 | Eddy current grating sensor with self-calibration function and self-calibration method |
| CN103322898B (en) * | 2013-06-05 | 2016-01-13 | 上海交通大学 | There is vortex lattice sensor and the method for self-calibrating of self-calibration function |
| CN106767366A (en) * | 2016-12-05 | 2017-05-31 | 上海砺晟光电技术有限公司 | Full digital vortex gate sensor based on micro-coil |
| CN109841136A (en) * | 2019-01-11 | 2019-06-04 | 挪度医疗器械（苏州）有限公司 | A kind of chest compression system |
| WO2020207000A1 (en) * | 2019-04-11 | 2020-10-15 | 郝佳 | Inductive position measuring sensor |
| US11971252B2 (en) | 2019-04-11 | 2024-04-30 | Jia Hao | Inductive position measuring sensor |
| CN110530250A (en) * | 2019-09-24 | 2019-12-03 | 天津捷力自动化设备有限公司 | A kind of novel sense grid and its working method for displacement measurement |
| CN112729089A (en) * | 2020-12-28 | 2021-04-30 | 无锡广联数字传感科技有限公司 | Displacement sensor applied to multiple occasions |
| CN112729089B (en) * | 2020-12-28 | 2022-08-19 | 无锡广联数字传感科技有限公司 | Displacement sensor applied to multiple occasions |
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| Publication number | Publication date |
|---|---|
| CN1180219C (en) | 2004-12-15 |
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Granted publication date: 20041215 |