CN1073761A - Precision length measuring method and universal gauge outfit - Google Patents
Precision length measuring method and universal gauge outfit Download PDFInfo
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- CN1073761A CN1073761A CN 92110040 CN92110040A CN1073761A CN 1073761 A CN1073761 A CN 1073761A CN 92110040 CN92110040 CN 92110040 CN 92110040 A CN92110040 A CN 92110040A CN 1073761 A CN1073761 A CN 1073761A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 230000010355 oscillation Effects 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims abstract description 10
- 230000010356 wave oscillation Effects 0.000 claims abstract description 5
- 230000003321 amplification Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000691 measurement method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
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- 229910001751 gemstone Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
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- 241001269238 Data Species 0.000 description 1
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a precise length measuring method and a universal meter for implementing the method. In the conventional electromagnetic measurement method, an R, L integral timing mode of inductance L and resistance R of an inductance sensor is adopted, and a square wave oscillation source is formed by combining signal amplification and a feedback link to change displacement into change of pulse frequency; the low-power consumption singlechip is combined with the oscillation source, and the waiting state of the low-power consumption singlechip is utilized to realize measurement. The universal meter head using the length measuring method has the characteristics of less circuit element number, small volume and extremely low power consumption, can be integrally assembled with a conventional plug gauge and a caliper gauge, is particularly suitable for batch measurement in a workshop, and is also suitable for mass production.
Description
The present invention relates to a kind of is the length measurement method of feature and the universal meter of implementing this method with the method for answering electricity consumption or electromagnetism.By inductance sensor displacement is become pulsed frequency and change, change frequency change into displacement more then, and show.The present invention is particularly suitable for the usefulness that compares and measures in enormous quantities.
Be that the basic thought that is used for the method that compares and measures in batches of feature generally is with the method for electricity or electromagnetism both at home and abroad: displacement is passed to alternating current bridge through the mobile variation that becomes inductance value of magnetic core barred body, the differential output of electric bridge, amplify through exchanging, phase depending on rectification, links such as direct current amplification change voltage analog into.Then, or become digital quantity, or become digital quantity output with pointer instrument through analog to digital conversion.For example: the patent disclosure of the patent No. 90212416.1 a kind of Electronic calliper gauge that makes in this way, this traditional mode has the shortcoming of the following aspects:
1, component number is many, and link is many, and the collocation screening of the adjustment of its multiplying power and linearity and element all has extremely tight requirement, therefore, is unsuitable for producing in enormous quantities, and costs an arm and a leg, and applies difficulty;
2, circuit is volume required bigger, and being not easy to directly adorn with feeler gauge or calliper is one;
3, its measurement range becomes with the difference of resolution, and generally its measurement range is less, thereby they all have harsh requirement to the machining precision of the basic machine of feeler gauge and calliper with to the dimensional accuracy of standard component;
4, generally be difficult to make hyperchannel, the measurement of many correlatives is difficult to realize.
The patent No. is that 88212744 patent has then provided a kind of difference structure that has, adopt the surveying instrument of differential mode of frequency regulation in conjunction with the single-chip microcomputer deal with data, it measuring accuracy and stable aspect improved some than the former, but because pulse signal need pass through links such as shaping, amplification, component number is many, the circuit part volume is big, and being not easy to directly adorn with feeler gauge that is used for measure batch and calliper is one, uses inconvenient.And complete machine work when it is measured, power consumption is bigger, is unsuitable for using dry cell power supply.
It is few to the purpose of this invention is to provide a kind of metering circuit element that can make, the circuit part volume is little, the measuring method that power consumption is extremely low, and providing the universal meter of implementing this method, this universal meter can directly be contained on conventional feeler gauge or the calliper easily, and measurement range is big, the precision height, antijamming capability is strong, and good stability is particularly suitable for duplicate measurements workpiece in enormous quantities in the workshop.
The present invention still adopts inductance sensor that displacement is become the pulsed frequency variation, change frequency change into displacement more then, and the measuring method that shows, feature of the present invention is: the inductance L that adopts inductance sensor, the R of resistance R, L integration timing mode amplifies in conjunction with signal and feedback element is formed the variation that the square wave oscillation source becomes displacement pulsed frequency, use low-power scm in conjunction with this oscillation source, utilize " waiting status " of low-power scm to realize measuring (meter frequently), when promptly measuring, timer conter of low-power scm is realized accurate timing, and a timer conter is as frequency counting.The universal meter of implementing said method has two core parts: one is oscillation source, and another is a single-chip computer with low power consumption.What connect with low-power scm also has reset circuit and reset key, latchs decoding unit and by the LCD of its control, differentiates or group lights group and function key.Said oscillation source be one by multivibrator (realize signal amplify and feedback), some sensors are connected in the resistance R between multivibrator and sensor
1, R
2, the square wave oscillation source that capacitor C and analog switch are formed.A wherein leg of low-power scm links to each other with the multivibrator of oscillation source, and two legs connect with analog switch in addition; Precision voltage regulator provides the high stability power supply for complete machine.
The present invention utilizes inductance sensor to transmit the impulse hunting source of displacement, does not need pulse signals to carry out links such as shaping; Utilize " waiting status " of low-power scm to measure, in measuring process, single-chip microcomputer is working procedure not, and other most of elements also remain static, thereby method of the present invention has the following advantages:
1, can make component number few, link is single, does not have the collocation problem of element, and control, computing, differentiation realize by mcu programming that all assembling is simple, and is easy to adjust, and flexible function is applied widely.
2, the required assembling volume of circuit part is little, be easy to same feeler gauge, calliper directly dress be one.
3, its power consumption is minimum, and the required electric current of circuit of measuring conversion portion is less than 0.3mA, and the complete machine electric current is not more than 2mA, and not with the increasing and strengthen electric current of passage, therefore can be used for powered battery.
4, its antijamming capability is extremely strong, good stability, and measuring error can be accomplished less than ± 0.005 micron.
5, its measurement range does not become with the variation of resolution, and measurement range is big.If adopt DGC-8ZG type sensor (Zhongyuan Measuring Instrument Plant's production), measurement range is ± 450 microns, requirement on machining accuracy to feeler gauge and calliper basic machine can hang down, especially to the physical size of standard component deviation with respect to nominal size, can relax in a big way, bring convenience to practical application, can reduce the cost of mechanical part.
6,, can hang up many sensors and realize in the measurement application scenario of many correlatives.
7, various fault diagnosis functions are arranged, bring convenience to working service.
The invention will be further described below in conjunction with accompanying drawing:
The block diagram of Fig. 1 universal meter of the present invention;
Fig. 2 oscillation source circuit figure;
Application example figure of Fig. 3 the present invention;
Fig. 4 is Fig. 3 embodiment singlechip CPU unit electrical schematic diagram;
Fig. 5 is Fig. 3 embodiment display unit electrical schematic diagram;
The little power consumption precision voltage regulator of Fig. 6 circuit diagram;
Fig. 7 main program flow chart;
The process flow diagram of Fig. 8 zero point drift patch routine;
Fig. 9 measures subroutine flow chart.
Among Fig. 1: 1-oscillation source, 2-low-power scm, 3-reset circuit, 4-latch decoding drive unit, 5-LCD, 6-differentiation or group lights, 7-function key, 11-precision voltage regulator, 12-aural warning.
It among Fig. 3 the present invention and the feeler gauge application example when being fitted together.Wherein 13-gauge outfit, 14-handgrip, 15-elastic body, 16-magnetic core stick, 17-jewel contact, 18-guide pin bushing, 19-coil, 20-matrix.
Embodiment: as Fig. 3, Fig. 4, Fig. 5, shown in Figure 6.
The present invention and conventional feeler gauge are connected as a single entity among this embodiment, and wherein low-power scm 2 can adopt the 87C51 chip or adopt the 80C31 chip to carry additionally program storage, and multivibrator 8 adopts CD4047, and analog switch 10 is selected 4 channel C D4052 for use.Other element and parameter are as figure.
Low-power scm 2 program storage unit (PSU)s have been inserted various functional program modules and constant in advance.Such as the program of control analog switch 10, sensor multiplying power, linear adjustment program, the storage of data such as the offset dimensions of the corresponding measurement point of ring standard gauge and qualified index, the zero drift revision program, the timing interrupt service routine, operation program, fault diagnostic program or the like.
Before the measurement, need that each sensor of gauge outfit is done a multiplying power and measure, and determine corresponding linear update equation with linear adjustment.Multiplying power and linear adjustment are by the precise jiggle stand and insert the sensor multiplying power of single-chip microcomputer 2 in advance, linear adjustment program is finished.The adjustment principle is: to a certain sensor of a certain passage, provide some definite displacements, measuring its correspondent frequency changes, multiplying power and linear adjustment program can be organized data according to this and determine to relate to multiplying power and all linear parameters, and definite linear update equation, according to the frequency change of a certain measured value, converse the numerical value of displacement with definite good equation during in order to measurement.
The data of qualified index, the offset dimensions of ring standard gauge can provide when the user orders goods, and together with all other programmable datas, one-step solidification is in single-chip microcomputer.
Before using each time, at first feeler gauge is inserted ring standard gauge and measure reference data, survey and finish, take out feeler gauge, instrument can measure the reference value of feeler gauge during the free time automatically.In order to keep this reference value constant, insert before workpiece measures at feeler gauge at every turn, free time constantly repeated the zero point drift revision program before single-chip microcomputer always utilized this section measurement.Main program flow chart as shown in Figure 7, the process flow diagram of zero point drift correction is as shown in Figure 8.
When the guide pin bushing 18 of feeler gauge inserts workpiece, jewel contact 17 is compressed, cause that magnetic core stick 16 moves relative to coil 19 generations, inductance between 1,2 pin of multivibrator CD4047 changes, thereby the square-wave pulse frequency of 13 pin output changes, and this pulse signal is by the counter meter frequency of single-chip microcomputer 2.Low-power scm adopts " waiting mode " meter frequently, and its process flow diagram as shown in Figure 9.
After obtaining measured value, by single-chip microcomputer 2 moderate multiplying factors, linear adjustment program changes the measured value of respective sensor into the displacement digital quantity; Reference value when deducting the deviate of ring standard gauge and surveying ring gauge with measured value then, and, obtain comparative result with itself and the comparison of given discriminant criterion.At last measurement data is sent display 5 to show, will be differentiated the result and send differentiation pilot lamp group 6, so far finish a measuring period.
To the measurement of many correlatives, can hang many sensors and realize.When for example hanging three or four sensors, use the program of control analog switch, measure the measured value of each passage successively, handle through Single Chip Microcomputer (SCM) program again, obtain the result of required many correlatives.
When the present invention and calliper cooperated, identical no longer the stopping of use principle stated.
Claims (4)
1, a kind of accurate measurement of length method, employing becomes pulsed frequency by inductance sensor with displacement and changes, the measuring method that frequency change is changed into displacement again and show is characterized in that: adopt inductance L, the R of resistance R, the L integration timing mode of inductance sensor to form the variation that the square wave oscillation source becomes displacement pulsed frequency in conjunction with signal amplification and feedback element; Use low-power scm in conjunction with this oscillation source, utilize " waiting status " of low-power scm to realize measuring (meter frequently), during measurement, timer conter of single-chip microcomputer is realized accurate timing, and a timer conter is realized frequency counting.
2, a kind of universal meter of implementing the described precision length measuring method of claim 1, it is characterized in that: two core parts are arranged, one is oscillation source 1, another is a single-chip computer with low power consumption 2, reset circuit 3 and the reset key in addition that connect with single-chip microcomputer 2, latch decoding unit 4 and by the LCD 5 of its control, differentiate or grouping electroluminescent lamp group 6 and function key 7, said oscillation source 1 be one by a multivibrator 8, some sensors 9 are connected in the resistance R of 9 of multivibrator 8 and sensors
1, R
2, the square wave oscillation source that capacitor C and analog switch 10 are formed, a wherein leg of single-chip microcomputer 2 and the multivibrator 8 of oscillation source 1 link, and other has two legs to connect with analog switch 10; Precision voltage regulator 11 provides the high stability power supply for complete machine.
3, the universal meter of linear measure longimetry according to claim 2 is characterized in that: low-power scm adopts the 87C51 chip.
4, according to the universal meter of claim 2 or 3 described linear measure longimetrys, it is characterized in that: multivibrator adopts CD4047.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92110040 CN1073761A (en) | 1992-09-02 | 1992-09-02 | Precision length measuring method and universal gauge outfit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92110040 CN1073761A (en) | 1992-09-02 | 1992-09-02 | Precision length measuring method and universal gauge outfit |
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| Publication Number | Publication Date |
|---|---|
| CN1073761A true CN1073761A (en) | 1993-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92110040 Pending CN1073761A (en) | 1992-09-02 | 1992-09-02 | Precision length measuring method and universal gauge outfit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8098100B2 (en) | 2007-03-15 | 2012-01-17 | Mediatek Inc. | Variable gain amplifiers |
| CN112577407A (en) * | 2019-09-27 | 2021-03-30 | 大族激光科技产业集团股份有限公司 | Method and system for correcting parameter drift of capacitive sensor |
-
1992
- 1992-09-02 CN CN 92110040 patent/CN1073761A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8098100B2 (en) | 2007-03-15 | 2012-01-17 | Mediatek Inc. | Variable gain amplifiers |
| CN112577407A (en) * | 2019-09-27 | 2021-03-30 | 大族激光科技产业集团股份有限公司 | Method and system for correcting parameter drift of capacitive sensor |
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