CN202885771U - Magnetostrictive self-calibration distance meter - Google Patents
Magnetostrictive self-calibration distance meter Download PDFInfo
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- CN202885771U CN202885771U CN 201220613149 CN201220613149U CN202885771U CN 202885771 U CN202885771 U CN 202885771U CN 201220613149 CN201220613149 CN 201220613149 CN 201220613149 U CN201220613149 U CN 201220613149U CN 202885771 U CN202885771 U CN 202885771U
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- magnetic test
- test coil
- amplifying circuit
- electronic switch
- flush bonding
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Abstract
The utility model provides a magnetostrictive self-calibration distance meter and belongs to the technical field of distance meters. A PWM (Pulse Width Modulation) port of an embedded processor is connected with one end of a voltage booster; the other end of the voltage booster is connected with one end of a rectifier; the other end of the rectifier is connected with one end of an electronic switch and one end of a voltage divider respectively; the other end of the voltage divider is connected with an A/D (Analog/Digital) interface of the embedded processor; a current pulse output end of the electronic switch is connected with an elastic steel wire; and a switching signal input end of the electronic switch is connected with an I/O (Input/Output) interface of the embedded processor. The accuracy of the magnetostrictive self-calibration distance meter only depends on the distance accuracy of a first detecting coil and a second detecting coil as well as temporal resolution, without being affected by environment temperature and tensile force of wire tension. Therefore, high accuracy and high stability can be obtained simultaneously. Power consumption is limited within 1 watt and a battery can be used for supplying power. The millimeter-scale accuracy of the magnetostrictive self-calibration distance meter can be guaranteed and is hardly affected by environmental factors within 15 meters, and calibration aiming at work environment is not needed.
Description
Technical field
The utility model relates to a kind of magnetostriction self calibration stadimeter, belongs to the stadimeter technical field.
Background technology
Magnetostriction, be exactly object when being subject to external magnetic field, can produce flexible relative deformation along magnetic line of force direction.The ferromagnetic material of all has magnetostrictive effect, and the magnetostrictive effect of different materials is different, extends under some material outside magnetic field effect, has positive magnetostriction coefficient; Shorten under some material outside magnetic field effects and have, have negative magnetostriction coefficient.
Form according to the geometrical variations of ferromagnetic material in magnetic field is different, and magnetostrictive effect can be divided into longitudinal effect, transversal effect, torsional effect and bulk effect, and in addition, magnetostriction also has back wash effect, i.e. the Villari effect.
Abroad, magnetostrictive liquid level sensor is take the product of American MTS company and U.S. Schaevitz company as Typical Representative, and early oneself is through successfully being applied in magnetostrictive technology in bulk displacement, level gauging field.The liquid level sensor that utilizes magnetostrictive effect to make owing to adopting contactless sensitive element, has reduced mechanical wear, therefore have higher reliability.According to the mensuration of American Space General Administration (NASA), the mean free error time of the sensing assembly of magnetostrictive liquid level sensor (MTBF) is 23 years.Simultaneously, because it is easy for installation, debugging is quick, measuring accuracy is high, cost is lower, has higher application and economic worth than measuring systems such as traditional machinery, electric capacity, pressure, ultrasound wave or servomechanism installations.
The output resolution ratio reading standard of the Temposonics III of American MTS company and L series magnetostrictive liquid level sensor is 5um, the highlyest can reach 2um.Measuring accuracy up to scholar 0.0l%F.S can be provided.Therefore, the precision of Temposonics III series of a new generation and function oneself almost near optical ruler, its ability of bearing powerful impact, vibration and contaminated environment is then strong several times than optical ruler.And price is the part of optical ruler, and these all are the scientific payoffss of MTS company.
Magnetostrictive liquid level sensor enters Chinese market in eighties of last century the eighties, and its typical products is the product of American MTS company and U.S. Schaevitz company, is mainly used in the supporting of import apparatus for production line.Domestic some R﹠D institution and manufacturing enterprise just actively develop research and development work to magnetostrictive liquid level sensor as far back as early 1990s, but its scale is all smaller, and its detection means is also all very limited, and most products also are in the sexual stage on probation now.
Existing external product is expensive, and the magnetostriction ranging technology affected by environmental parameter larger, environment temperature and elastic wire tension force all can affect measuring accuracy.
Summary of the invention
The purpose of this utility model is that affected by environmental parameter larger in order to solve existing magnetostriction stadimeter, and environment temperature and elastic wire tension force all can affect the problem of measuring accuracy, and then a kind of magnetostriction self calibration stadimeter is provided.
The purpose of this utility model is achieved through the following technical solutions:
A kind of magnetostriction self calibration stadimeter, comprise: elastic wire, removable magnet ring, the first magnetic test coil, the second magnetic test coil, the first amplifying circuit, the second amplifying circuit, electronic switch, voltage divider, rectifier, stepup transformer, flush bonding processor and display, described removable magnet ring is arranged at tested apart from terminal point, the second magnetic test coil is arranged at tested apart from initial point, it is between removable magnet ring and the second magnetic test coil that the first magnetic test coil is arranged on the detection path, elastic wire passes the second magnetic test coil, the first magnetic test coil and removable magnet ring, the second magnetic test coil is connected with the input end of the first amplifying circuit, the first magnetic test coil is connected with the input end of the second amplifying circuit, the output terminal of the first amplifying circuit and the second amplifying circuit is connected with the sampling pin of flush bonding processor respectively, the PWM port of flush bonding processor is connected with an end of stepup transformer, the other end of stepup transformer is connected with an end of rectifier, the other end of rectifier is connected with an end of electronic switch and an end of voltage divider respectively, the other end of voltage divider is connected with the A/D interface of flush bonding processor, the current impulse output terminal of electronic switch is connected with elastic wire, the switching signal input end of electronic switch is connected with the I/O interface of flush bonding processor, and the VT of flush bonding processor is connected with display.
The utlity model has following advantage: precision of the present utility model only depends on range accuracy and the time sense of the first magnetic test coil and the second magnetic test coil, not affected by environment temperature and pull spring pulling force.So can obtain simultaneously high precision and high stability.Cost increases few and can exempt complicated frequently to the calibration of surveying instrument.The stadimeter design is take High Speed Embedded Processor as core.Reduce cost, increased the simplicity of reliability and use.Power consumption constraints can be used powered battery in 1 watt.The utility model can 15 meters with interior assurance grade precision and be subjected to hardly such environmental effects, need not to calibrate for working environment.
Description of drawings
Fig. 1 is the annexation schematic diagram of magnetostriction self calibration stadimeter of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail: the present embodiment is implemented under take technical solutions of the utility model as prerequisite, has provided detailed embodiment, but protection domain of the present utility model is not limited to following embodiment.
As shown in Figure 1, a kind of magnetostriction self calibration stadimeter that the present embodiment is related, comprise: elastic wire 1, removable magnet ring 2, the first magnetic test coil 3, the second magnetic test coil 4, the first amplifying circuit 5, the second amplifying circuit 6, electronic switch 7, voltage divider 8, rectifier 9, stepup transformer 10, flush bonding processor 11 and display 12, described removable magnet ring 2 is arranged at tested apart from terminal point, the second magnetic test coil 4 is arranged at tested apart from initial point, it is between removable magnet ring 2 and the second magnetic test coil 4 that the first magnetic test coil 3 is arranged on the detection path, elastic wire 1 passes the second magnetic test coil 4, the first magnetic test coil 3 and removable magnet ring 2, the second magnetic test coil 4 is connected with the input end of the first amplifying circuit 5, the first magnetic test coil 3 is connected with the input end of the second amplifying circuit 6, the output terminal of the first amplifying circuit 5 and the second amplifying circuit 6 is connected with the sampling pin of flush bonding processor 11 respectively, the PWM port of flush bonding processor 11 is connected with an end of stepup transformer 10, the other end of stepup transformer 10 is connected with an end of rectifier 9, the other end of rectifier 9 is connected with an end of electronic switch 7 and an end of voltage divider 8 respectively, the other end of voltage divider 8 is connected with the A/D interface of flush bonding processor 11, the current impulse output terminal of electronic switch 7 is connected with elastic wire 1, the switching signal input end of electronic switch 7 is connected with the I/O interface of flush bonding processor 11, and the VT of flush bonding processor 11 is connected with display 12.
Described elastic wire 1 is commercially available magnetostrictive effect steel wire.
Described removable magnet ring 2 also available monolithic magnet replaces, and is limited can detect at the coil place suitable amplitude wave-shape (from 50 millivolts to 1 volt).
Described the first magnetic test coil 3 and the second magnetic test coil 4 are 1 ~ 3,000 circle air core coil.
The bandpass filter that described the first amplifying circuit 5 and the second amplifying circuit 6 are the amplifier formation adds the phase shift comparer.
Described electronic switch 7 adopts large current MOS pipe.
Described voltage divider 8 is electric resistance partial pressure.
Described rectifier 9 and stepup transformer 10 form by the switching current pump circuit.
Described flush bonding processor 11 uses low-power consumption high-speed microprocessor or DSP.
Described flush bonding processor 11 is the TI-MSP430F149 single-chip microcomputer.）
Principle of work:
By current impulse, produce the elastic mechanical ripple at removable magnet ring place in the elastic wire, be back to the magnetic test coil place along elastic wire, by magnetostrictive reaction, in magnetic test coil, induce signal.
The pulsed drive part produces pulse width modulated waveform (PWM ripple) by flush bonding processor.After the rectification of boosting, produce 30 volts of DC voltage.After processor die number conversion pin measures this voltage, connect electronic switch 10 microseconds by the I/O mouth.In having the elastic wire of magnetostrictive effect, produce a current impulse.This pulse and removable magnet ring effect produce a mechanical wave.This ripple is propagated with about 2 to 3 km per second speed, is detected by the first magnetic test coil and the second magnetic test coil, enters the sampling pin of flush bonding processor by amplifying circuit.
Because it is known that two magnetic test coils distance is fixed as, distance draws the velocity of propagation of elastic wave in steel wire divided by the mistiming that two coils detect signal.This speed multiply by to be sent electric pulse and receives the time of returning pulse to the first coil and be the first coil to the distance of removable magnet ring.(in fact, electric pulse receives the time of returning pulse and forms by two sections to the first magnetic test coil, and namely electric pulse passes to removable magnet ring place and passes the time with time and elastic mechanical ripple back by removable magnet ring place.Since electric pulse pass to the first magnetic test coil place with the time be respective distance divided by 300,000 kilometer per seconds, the used time can ignore with respect to this stadimeter.）
The above; it only is the better embodiment of the utility model; these embodiments all are based on the different implementations under the utility model general idea; and protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (9)
1. magnetostriction self calibration stadimeter, it is characterized in that, comprise: elastic wire, removable magnet ring, the first magnetic test coil, the second magnetic test coil, the first amplifying circuit, the second amplifying circuit, electronic switch, voltage divider, rectifier, stepup transformer, flush bonding processor and display, described removable magnet ring is arranged at tested apart from terminal point, the second magnetic test coil is arranged at tested apart from initial point, it is between removable magnet ring and the second magnetic test coil that the first magnetic test coil is arranged on the detection path, elastic wire passes the second magnetic test coil, the first magnetic test coil and removable magnet ring, the second magnetic test coil is connected with the input end of the first amplifying circuit, the first magnetic test coil is connected with the input end of the second amplifying circuit, the output terminal of the first amplifying circuit and the second amplifying circuit is connected with the sampling pin of flush bonding processor respectively, the PWM port of flush bonding processor is connected with an end of stepup transformer, the other end of stepup transformer is connected with an end of rectifier, the other end of rectifier is connected with an end of electronic switch and an end of voltage divider respectively, the other end of voltage divider is connected with the A/D interface of flush bonding processor, the current impulse output terminal of electronic switch is connected with elastic wire, the switching signal input end of electronic switch is connected with the I/O interface of flush bonding processor, and the VT of flush bonding processor is connected with display.
2. magnetostriction self calibration stadimeter according to claim 1 is characterized in that, described elastic wire is commercially available magnetostrictive effect steel wire.
3. magnetostriction self calibration stadimeter according to claim 1 is characterized in that, described the first magnetic test coil and the second magnetic test coil are 1 ~ 3,000 circle air core coil.
4. magnetostriction self calibration stadimeter according to claim 1 is characterized in that, the bandpass filter that described the first amplifying circuit and the second amplifying circuit are the amplifier formation adds the phase shift comparer.
5. magnetostriction self calibration stadimeter according to claim 1 is characterized in that, described electronic switch adopts large current MOS pipe.
6. magnetostriction self calibration stadimeter according to claim 1 is characterized in that, described voltage divider is electric resistance partial pressure.
7. magnetostriction self calibration stadimeter according to claim 1 is characterized in that, described rectifier and stepup transformer form by the switching current pump circuit.
8. magnetostriction self calibration stadimeter according to claim 1 is characterized in that, described flush bonding processor uses low-power consumption high-speed microprocessor or DSP.
9. magnetostriction self calibration stadimeter according to claim 8 is characterized in that, described flush bonding processor is the TI-MSP430F149 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220613149 CN202885771U (en) | 2012-11-20 | 2012-11-20 | Magnetostrictive self-calibration distance meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220613149 CN202885771U (en) | 2012-11-20 | 2012-11-20 | Magnetostrictive self-calibration distance meter |
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| Publication Number | Publication Date |
|---|---|
| CN202885771U true CN202885771U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220613149 Expired - Lifetime CN202885771U (en) | 2012-11-20 | 2012-11-20 | Magnetostrictive self-calibration distance meter |
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| CN (1) | CN202885771U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937408A (en) * | 2012-11-20 | 2013-02-20 | 张伟 | Magnetostrictive self-calibration distance meter |
| CN116447961A (en) * | 2023-06-16 | 2023-07-18 | 广东润宇传感器股份有限公司 | Magnetic scale positioning calibration test system |
-
2012
- 2012-11-20 CN CN 201220613149 patent/CN202885771U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937408A (en) * | 2012-11-20 | 2013-02-20 | 张伟 | Magnetostrictive self-calibration distance meter |
| CN102937408B (en) * | 2012-11-20 | 2014-12-10 | 张伟 | Magnetostrictive self-calibration distance meter |
| CN116447961A (en) * | 2023-06-16 | 2023-07-18 | 广东润宇传感器股份有限公司 | Magnetic scale positioning calibration test system |
| CN116447961B (en) * | 2023-06-16 | 2023-09-26 | 广东润宇传感器股份有限公司 | Magnetic scale positioning calibration test system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |