CN1222755C - Inductive frequency-regulation intelligent digital displacement sensor - Google Patents
Inductive frequency-regulation intelligent digital displacement sensor Download PDFInfo
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- CN1222755C CN1222755C CN 200410022895 CN200410022895A CN1222755C CN 1222755 C CN1222755 C CN 1222755C CN 200410022895 CN200410022895 CN 200410022895 CN 200410022895 A CN200410022895 A CN 200410022895A CN 1222755 C CN1222755 C CN 1222755C
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 17
- 230000001939 inductive effect Effects 0.000 title abstract description 9
- 230000033001 locomotion Effects 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000003534 oscillatory effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000005389 magnetism Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The present invention relates to an inductive frequency-regulating intelligent digital displacement sensor which comprises a sealed housing, an inductive coil, a movable rod and a data processing circuit, wherein the inductive coil, the movable rod and the data processing circuit are arranged in the sealed housing, and the data processing circuit comprises a capacitor, a timer, a single chip computer chip, a serial memorizer chip, a serial interface chip, etc. The movable rod is inserted into the inductive coil and is a magnetism conducting metal rod capable of relatively moving in the inductive coil which is a metal coil whose inductance quantity L can change along with the movement of the movable rod; both ends of the inductive coil are respectively connected with the data processing circuit. The present invention has the advantages of independent measuring result from the length of an output cable, high precision, high stability and suitable long-distance transmission, and can directly output displacement quantity and directly display the code mark of the sensor, technical parameters and measuring environmental parameters. The code mark, the scale parameter and other records of the sensor are permanently stored in the memorizer chip, and measured parameters can be automatically stored for 250 times during each time of measurement.
Description
Technical field:
The present invention relates to sensor technical field, particularly the technological improvement of inductive displacement transducer and innovation
Background technology:
But being the movable rod member according to magnetic conduction, inductive displacement transducer produces a kind of displacement transducer that inductance that relative motion is a coil and displacement proportion relation are made in coil.Because its precision height, good stability, all obtained widespread use in fields such as machinery, water conservancy and hydropower, railway, traffic, buildings, but existing inductance displacement sensor has following shortcoming: 1, the direct outputting inductance L of sensor, and inductance L is relevant with the output line length, inductance that secondary instrument is surveyed not is the legitimate reading of coil inductance, has certain measuring errors; 2, the parameter of sensor output is coil inductance L, also need to convert according to calibration curve just can draw displacement, thereby test speed is slow, to tester's technical requirement height; 3, during sensor is embedded in the engineering structure the long-term quality monitoring of institute in a large number, when causing sensor number to lose when the stained or broken string of sensor the end of a thread takes place, measured data have formed invalid data because of determining its burial place.
Summary of the invention:
Technical matters to be solved by this invention is: a kind of inductance fm formula displacement transducer that has nothing to do, can directly show displacement with cable length, surrounding environment etc. is provided.
The technical solution used in the present invention is: it comprises telefault, motion bar and the data processing circuit that is provided with in seal casinghousing and the housing, and described data processing circuit comprises capacitor, timer, singlechip chip, Serial Storage chip, serial interface chip etc.; Described motion bar inserts in the telefault, is the magnetic conductive metal bar that can do relative motion in telefault, and described telefault can be with the wire coil that changes that moves of motion bar for inductance value L, and its two ends are connected with data processing circuit respectively.
The invention has the beneficial effects as follows:
1, the present invention is frequency signal with inductance value L in the sensor internal conversion by capacitor C and timer, makes measurement result and output cable length irrelevant, has improved measuring accuracy and long-time stability, is fit to do long-distance transmissions;
2, convert through the numerical value of single-chip microcomputer etc. and handle, sensor is output shift quantity directly, directly shows sensor number and technical parameter and measurement environment parameter etc., has removed the trouble of workman's calculating from;
3, record such as number of sensor, calibrating parameters for good and all is stored in the memory chip of sensor, and can preserve automatically when each the measurement and survey parameter 250 times, as Measuring Time, measuring point temperature, zero point parameter, shift value etc.Therefore, though the transmission-line cable breakdown of sensor, as long as reclose and can from sensor, access original and historical test data and recover new test.
Description of drawings:
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural principle block diagram of the embodiment of the invention;
Fig. 2 is the circuit theory diagrams of the embodiment of the invention.
Wherein:
1, motion bar 2, seal casinghousing
2, coil 4, capacitor
5, timer 6, singlechip chip
7, serial storage chip 8, serial interface chip
Specific embodiments:
As shown in Figure 1, 2, the concrete structure of the embodiment of the invention is: it comprise seal casinghousing 2 and be sealed in telefault 3, the motion bar 1 in the housing 2 and be arranged on seal casinghousing outer, with the data processing circuit that telefault 3 links to each other, described data processing circuit comprises capacitor 4, timer 5, singlechip chip 6, Serial Storage chip 7, serial interface chip 8 etc.; Described motion bar 2 inserts in the telefault 3, it is the Metallic rod that in telefault 3, to make the magnetic conduction of relative motion, telefault 3 changes wire coil for inductance value L with moving of motion bar, its two ends link to each other with capacitor 4 respectively, in parallel with the input end of timing circuit again, the output terminal of timing circuit is connected with the I/O interface of singlechip chip 6 again, the read/write interface SDA of singlechip chip 6, SCL pin are connected with serial storage chip 7, and the RXD of singlechip chip 6, TXD pin are connected with serial interface chip 8; Wherein by capacitor 4 and telefault 3, timer 5 is formed an oscillatory circuit, export a square wave signal that frequency is directly proportional with inductance value L, this square wave signal is connected with the I/O of singlechip chip 6, singlechip chip 6 calculates the frequency of this square wave signal by certain program, serial storage chip 7 is connected with the read/write interface of access port with singlechip chip 6, reception is from the read/write instruction of single-chip microcomputer, store or access numerical signal, serial interface chip 8 is connected with the serial line interface of monolithic movement 6 with the control mouth, reception is sent serial signal outside or is received external serial command by the transmitting-receiving mouth from the read/write instruction of singlechip chip 6.
Described singlechip chip 6 adopts MCS-51 series monolithic chip; Described Serial Storage chip 7 is that the 24C64 electricity can be write ROM (read-only memory); Described serial interface chip 8 is RS232
Principle of work of the present invention is: the square wave signal of timing circuit 5 output frequencies and the proportional relation of inductance value L also is connected to the I/O mouth of singlechip chip, the MCS51 series monolithic detects the frequency of the square wave signal of self-timer to carry out certain logical and numerical evaluation, obtains shift value; The 24C64 electricity can be write ROM (read-only memory) 7 and be connected with read/write mouth SDA, the SCL pin of MCS51 singlechip chip 6 with access port, according to read/write instruction from singlechip chip 6, store or access numerical signal, RS232 type serial interface chip 8 is with the reading and writing data order of control mouth with MCS51 singlechip chip 6, implement the conversion of numerical signal and serial signal, and send serial signal outside or accept external serial command by its transmitting-receiving mouthful S1, a S2.Described inductance fm formula intelligent digital displacement transducer is also drawn two signal wire S1, S2 and two power lead P1, P2, and wherein P1 is connected with ground wire GND, the power lead V of P2 and each element circuit
Cc
Claims (4)
1, a kind of inductance fm formula intelligent digital displacement transducer is characterized in that: it comprises seal casinghousing (2) and is sealed in housing (2) interior telefault (3), motion bar (1), data processing circuit; Described data processing circuit comprises capacitor (4), timer (5), singlechip chip (6), Serial Storage chip (7), serial interface chip (8) etc.; Described motion bar (1) inserts in the telefault (3), it is the magnetic conductive metal bar that can do relative motion in telefault (3), described telefault (3) can be with the wire coil that changes that moves of motion bar (1) for inductance value L, and its two ends are connected with data processing circuit respectively.
2, inductance fm formula intelligent digital displacement transducer according to claim 1, it is characterized in that: the two ends of telefault (3) are connected with capacitor (4), and are in parallel with the input end of timer (5) again; Capacitor (4) is formed an oscillatory circuit with telefault (3), timer (5), exports the square wave signal that frequency is directly proportional with inductance value L by the I/O mouth of singlechip chip (6) to singlechip chip (6); The output terminal of timing circuit (5) is connected with the I/O interface of singlechip chip (6), and the read/write interface SDA of singlechip chip (6), SCL pin are connected with the access port of serial storage chip (7); The RXD of singlechip chip (6), TXD pin are connected with the control mouth of serial interface chip (8).
3, inductance fm formula intelligent digital displacement transducer according to claim 1 and 2 is characterized in that: described singlechip chip (6) adopts MCS-51 series monolithic chip; Described Serial Storage chip (7) adopts the 24C64 electricity can write ROM (read-only memory); Described serial interface chip (8) is RS232.
4, inductance fm formula intelligent digital displacement transducer according to claim 1 is characterized in that: be provided with the cable that comprises two signal wires (S1, S2) and two power leads (P1, P2) on seal casinghousing (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410022895 CN1222755C (en) | 2004-02-16 | 2004-02-16 | Inductive frequency-regulation intelligent digital displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410022895 CN1222755C (en) | 2004-02-16 | 2004-02-16 | Inductive frequency-regulation intelligent digital displacement sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1560559A CN1560559A (en) | 2005-01-05 |
| CN1222755C true CN1222755C (en) | 2005-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410022895 Expired - Lifetime CN1222755C (en) | 2004-02-16 | 2004-02-16 | Inductive frequency-regulation intelligent digital displacement sensor |
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| CN (1) | CN1222755C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175127B (en) * | 2011-01-21 | 2013-06-05 | 吉林省交通科学研究所 | Real-time online monitoring method and device of cracking instability of highway subgrade |
| DE102011085740A1 (en) * | 2011-11-03 | 2013-05-08 | Continental Teves Ag & Co. Ohg | Inductive displacement sensor |
| CN104534974B (en) * | 2015-01-28 | 2017-03-22 | 长沙亿拓土木工程监测仪器有限公司 | Wide-range inductive frequency-modulation type displacement measurement device and method |
| CN113668189A (en) * | 2020-05-14 | 2021-11-19 | 青岛海尔洗衣机有限公司 | Displacement detection device, washing machine and control method of washing machine |
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- 2004-02-16 CN CN 200410022895 patent/CN1222755C/en not_active Expired - Lifetime
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| Publication number | Publication date |
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| CN1560559A (en) | 2005-01-05 |
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Address after: 410013 Changsha City, Hunan Province, Silver Valley Road, high-tech park, M0 venture building Patentee after: KINGMACH MEASUREMENT&MONITORING TECHNOLOGY CO.,LTD. Address before: 410013 Changsha City, Hunan Province, Silver Valley Road, high-tech park, M0 venture building Patentee before: Changsha Jinma High-Tech Industrial Co.,Ltd. |
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Granted publication date: 20051012 |
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