CN201787917U - High-accuracy magnetic displacement transducer - Google Patents
High-accuracy magnetic displacement transducer Download PDFInfo
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- CN201787917U CN201787917U CN2010202269838U CN201020226983U CN201787917U CN 201787917 U CN201787917 U CN 201787917U CN 2010202269838 U CN2010202269838 U CN 2010202269838U CN 201020226983 U CN201020226983 U CN 201020226983U CN 201787917 U CN201787917 U CN 201787917U
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Abstract
The utility model provides a high-accuracy magnetic displacement transducer which comprises a magnetic tape, a magnetic induction element, a signal amplifying and processing circuit, a digital signal processor, a program memory, and an output signal conversion and interface circuit. The magnetic tape is a magnetic grid tape formed by N poles and S poles which are arranged in alternating mode at intervals; the magnetic tape is fixed on a device to be tested; the magnetic induction element and the magnetic tape are arranged in an opposite mode; the magnetic induction element generates electromagnetic induction signals when moving relative to the magnetic tape; the signal amplifying and processing circuit is connected with the magnetic induction element and the digital signal processor; and the output end of the digital signal processor is connected with the output signal conversion and interface circuit. The high-accuracy magnetic displacement transducer utilizes the magnetic tape and the magnetic induction element to generate electromagnetic induction, accordingly the measuring performance, reliability and adaptability to environments of the high-accuracy magnetic displacement transducer are effectively improved.
Description
Technical field
The utility model relates to a kind of high precision magnetic displacement transducer, and is particularly a kind of based on electromagnetic induction principle, adopts tape and magnetic induction part to produce the high precision magnetic displacement transducer of electromagnetic induction, belongs to the electromechanical equipment technical field.
Background technology
Displacement transducer is a kind of electromechanical assembly that is used to measure full size and mechanical shift.At present, being widely used in various accurate touch-control lathes, digital machine-building, electronic surveying and manufacturing, boats and ships, weaving, printing, aviation, military project, automobile making, testing machine, elevator, chemical industry etc., is a kind of electromechanical assembly that is of wide application.
At present, the sensor technology that is applied to displacement measurement mainly contains two big classes: contact class and noncontact class.
The contact class mainly contain resistance-type linear displacement transducer etc., mainly comprise two kinds of metallic conductor class and electric plastics formula displacement transducers at present.These class Fundamentals of Sensors are simple, and manufacturing is very ripe with application, is widely used, and is cheap, but are not suitable for large range measuring, and serviceable life is short, is not suitable for commercial Application, non-digitalization.
Noncontact class displacement transducer has capacitive displacement transducer, inductive displacement transducer, ultrasonic type displacement transducer, laser type displacement transducer, electric vortex type displacement sensor, differential transformer displace (LVDT), grating displacement transducer, magnetic scale etc.Wherein electric capacity, inductance, ultrasound wave, laser, electric vortex type displacement sensor all are only applicable to volume and range ratio smaller applications place.
Differential transformer displace (LVDT) is a kind of open-flux path weak coupling measuring sensor based on electromagnetic induction principle.It adopts materials such as epoxy glass fabric, stainless steel as coil rack, uses the not enameled wire in collinear footpath, one group of primary coil of coiling on skeleton, two groups of secondary coils.Its working method depends on moving of in coil rack iron core.When elementary coil is supplied with the alternating voltage (driving voltage) of certain frequency, iron core moves the Distribution of Magnetic Field that has just changed the space in coil, thereby at the beginning of having changed, mutual induction amount between the secondary coil, secondary coil just produces induction electromotive force, position difference along with iron core, mutual induction amount is also different, the induction electromotive force of secondary generation is also different, so just (actual iron core is to contact with the measured object maintenance by measuring staff with the displacement of iron core, the displacement of testee just) become voltage signal output, then amplify and this voltage signal of processing circuit processes by signal, and export corresponding measurement data by output interface.But because the restriction of manufacturing and service condition, differential transformer type (LVDT) displacement transducer is not suitable for overlength manufacturing and application.
The grating rule displacement sensor is a kind of measurement feedback assembly that utilizes the optical principle work of grating.The grating rule displacement sensor often is applied to can be used as the detection of straight-line displacement or angular displacement in the closed loop servo system of numerical control.Its signal of measuring output is digit pulse, and it is big to have sensing range, accuracy of detection height, the characteristics that response speed is fast.
The grating rule displacement sensor is made up of scale grating and grating reading head two parts.Half is fixed on the scale grating on the lathe movable part, and grating reading head is made up of light source, convergent lens, indication grating, photovalve and adjusting mechanism etc., is installed on the lathe fixed part.
Common grating all is based on the formation principle of Moire fringe physically and carries out work, and its essence is exactly to be that a standard ruler contraposition amount of moving is measured with grating pitch.The general cost of high-resolution grating chi is more expensive, and manufacturing, difficult in maintenance, is not suitable for overlength and uses.In addition, because the problem of principle, the grating rule displacement sensor has very high requirement to dustproof, anti-greasy dirt, anticorrosion, and there is certain limitation the application scenario that vibration and vibrations are arranged.
The magnetic scale position detecting device is made up of magnetic scale (abbreviation magnetic scale), magnetic head and testing circuit, and its measuring principle is similar to the recording principle of tape.Plating one deck thin magnetic film (Ni-Co-P commonly used or Fe-Co alloy) on the matrix of the material of non-magnetic conduction such as copper, stainless steel, glass or other alloy materials.During the slotted line displacement, non-magnetic object can be made chi shape (band shape); During the measured angular displacement, can make cylindrical.Before measurement, earlier on thin magnetic film, record a series of magnetic signal at certain intervals by standard scale, at this moment thin magnetic film is called magnetic grid, during measurement, magnetic grid moves (or rotation) and reads (induction) these magnetic grid signals that move with magnetic head with displacement, make the coil in the magnetic head produce the induction simple sinusoidal electromotive, the frequency of these electromotive force is counted, just can Displacement Measurement.But the speed of the fast moving of numerically-controlled machine has reached 24m/min at present, and magnetic scale is difficult to catch up with high like this reaction velocity as measuring sensor, and its application is restricted.
In view of this, for performance and the reliability that improves displacement transducer, the utility model provides a kind of high precision magnetic displacement transducer.
Summary of the invention
The purpose of this utility model is to solve problems of the prior art, provides a kind of based on electromagnetic induction principle, adopts tape and magnetic induction part to produce the high precision magnetic displacement transducer of electromagnetic induction.
The purpose of this utility model is achieved by following technical proposals:
The high precision magnetic displacement transducer is characterized in that: comprising: tape, magnetic induction part, signal amplification and treatment circuit, digital signal processor, program storage, output signal conversion and interface;
The magnetic grid band of described tape for constituting by the N utmost point and S utmost point interleaved; This tape is fixed on the equipment to be detected, can be with equipment to be detected along rectilinear motion;
Described magnetic induction part and tape are oppositely arranged; Between this magnetic induction part and tape, leave certain interval; This magnetic induction part with the relative motion of described tape in produce electromagnetic induction signal; Described signal amplification is connected with described magnetic induction part with treatment circuit, this electromagnetic induction signal is amplified and is converted to digital signal; Described signal amplification is connected with described digital signal processor with treatment circuit, and the digital signal after the conversion is sent to described digital signal processor; Described digital signal processor links to each other with described program storage, and the calculation procedure that is invoked in the program storage to be stored is handled described digital signal; The output terminal of described digital signal processor links to each other with interface circuit with described output signal conversion.
Described tape is made by the rare earth element material.
The conversion of described output signal and interface are a kind of or several combination in parallel in synchronous serial interface, increment circuit interface, width modulation interface, bi-directional synchronization serial line interface, Serial Peripheral Interface (SPI), the digital-to-analog conversion interface.
The beneficial effects of the utility model are: adopt the high precision magnetic displacement transducer of tape as scale, improved measuring accuracy and distance, strengthened functional reliability and adaptive capacity to environment, the multiple way of output selects also to have expanded the scope of application of equipment.
Description of drawings
Fig. 1 is a high precision magnetic displacement transducer schematic diagram.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As previously mentioned, existing all kinds of displacement transducers all can not be taken into account in each side such as measurement performance, reliability and adaptives capacity to environment.Given this, the utility model adopts tape and magnetic induction part to produce electromagnetic induction based on electromagnetic induction principle, and having designed a kind of high precision magnetic displacement transducer all has good behaviour in every respect.
Fig. 1 is the schematic diagram of high precision magnetic displacement transducer.As shown in the figure, this high precision magnetic displacement transducer comprises: tape 11, magnetic induction part 12, signal amplify and treatment circuit 2, digital signal processor 3, program storage 4, output signal conversion and interface circuit 5.
The physical resolution of existing code-disc is low, and 1 μ m resolution is high precision, if make the high-resolution grating of physics, not only volume is big, the technical difficulty height, and the cost height, and also also very high to the technical requirement and the cost of manufacturing installation.And tape is made simply, and record magnetic, demagnetization and installation adjustment are all more convenient, and precision can reach 0.1 μ m, and is non-maintaining, long service life.It is very long that tape itself can be done, thereby increased measuring distance greatly, and measuring distance of the present utility model can reach 100 meters usually.Because the advantage on the magnetic displacement transducer principle, it is better than the grating rule displacement sensor on earthquake resistance and prevention performance, adaptive capacity to environment.Existing magnetic displacement transducer adopts magnetic head to read (induction) magnetic grid signal usually, because magnetic head and magnetic scale are in contact with one another when work, thereby have wearing and tearing, and be difficult to improve its reaction velocity, and the utility model adopts magnetic induction part to produce induction electromotive force, effectively avoid this drawback, and improved measuring speed greatly, can reach 20m/s at present.
In sum, the utility model is based on electromagnetic induction principle, adopts tape and magnetic induction part to produce the designed high-accuracy magnetic displacement transducer of electromagnetic induction, has the characteristics such as precision height, reliability are strong, adaptable. Ability those skilled in the art's any not creative transformation of doing under this design philosophy all should be considered as within protection domain of the present utility model.
Claims (3)
1. the high precision magnetic displacement transducer is characterized in that: comprising: tape, magnetic induction part, signal amplification and treatment circuit, digital signal processor, program storage, output signal conversion and interface;
The magnetic grid band of described tape for constituting by the N utmost point and S utmost point interleaved; This tape is fixed on the equipment to be detected, can be with equipment to be detected along rectilinear motion;
Described magnetic induction part and tape are oppositely arranged; Between this magnetic induction part and tape, leave certain interval; This magnetic induction part with the relative motion of described tape in produce electromagnetic induction signal; Described signal amplification is connected with described magnetic induction part with treatment circuit, this electromagnetic induction signal is amplified and is converted to digital signal; Described signal amplification is connected with described digital signal processor with treatment circuit, and the digital signal after the conversion is sent to described digital signal processor; Described digital signal processor links to each other with described program storage; The output terminal of described digital signal processor links to each other with interface circuit with described output signal conversion.
2. high precision magnetic displacement transducer as claimed in claim 1 is characterized in that: described tape is made by the rare earth element material.
3. high precision magnetic displacement transducer as claimed in claim 1 is characterized in that: the conversion of described output signal and interface are a kind of or several combination in parallel in synchronous serial interface, increment circuit interface, width modulation interface, bi-directional synchronization serial line interface, Serial Peripheral Interface (SPI), the digital-to-analog conversion interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202269838U CN201787917U (en) | 2010-06-09 | 2010-06-09 | High-accuracy magnetic displacement transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202269838U CN201787917U (en) | 2010-06-09 | 2010-06-09 | High-accuracy magnetic displacement transducer |
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| CN201787917U true CN201787917U (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202269838U Expired - Fee Related CN201787917U (en) | 2010-06-09 | 2010-06-09 | High-accuracy magnetic displacement transducer |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251655A (en) * | 2013-06-26 | 2014-12-31 | 昆山科致瑞斯传感技术有限公司 | Industrial magnetoelectric nanometer displacement sensor |
| CN104422382A (en) * | 2013-08-31 | 2015-03-18 | 上海球栅测量系统有限公司 | Wide power supply linear encoder for magnetic grating sensor |
| CN104422381A (en) * | 2013-08-31 | 2015-03-18 | 上海雷尼威尔技术有限公司 | Wide power supply displacement measuring system and device |
| CN105547124A (en) * | 2016-01-15 | 2016-05-04 | 中国工程物理研究院材料研究所 | Device and method for measuring displacement of object in paramagnetic box based on magnetic mark |
| CN107352241A (en) * | 2017-07-19 | 2017-11-17 | 天奇自动化工程股份有限公司 | Lowering or hoisting gear and its function realizing method with belt fracture warning function |
| CN109716072A (en) * | 2016-09-22 | 2019-05-03 | 萨根迪有限公司 | Inductance type transducer equipment |
| CN110126466A (en) * | 2019-05-16 | 2019-08-16 | 森大（深圳）技术有限公司 | Spray head flares control method, device and computer readable storage medium |
| WO2021057730A1 (en) * | 2019-09-29 | 2021-04-01 | 桂林广陆数字测控有限公司 | Hybrid positioning electromagnetic induction-type displacement sensor |
| WO2023016156A1 (en) * | 2021-08-11 | 2023-02-16 | 苏州汇川控制技术有限公司 | Communication-type magnetic scale read head, magnetic scale apparatus, electric motor module and position measurement method |
-
2010
- 2010-06-09 CN CN2010202269838U patent/CN201787917U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251655A (en) * | 2013-06-26 | 2014-12-31 | 昆山科致瑞斯传感技术有限公司 | Industrial magnetoelectric nanometer displacement sensor |
| CN104422382A (en) * | 2013-08-31 | 2015-03-18 | 上海球栅测量系统有限公司 | Wide power supply linear encoder for magnetic grating sensor |
| CN104422381A (en) * | 2013-08-31 | 2015-03-18 | 上海雷尼威尔技术有限公司 | Wide power supply displacement measuring system and device |
| CN105547124B (en) * | 2016-01-15 | 2018-02-02 | 中国工程物理研究院材料研究所 | Ohject displacement measurement apparatus and its measuring method in paramagnetic case based on magnetic mark |
| CN105547124A (en) * | 2016-01-15 | 2016-05-04 | 中国工程物理研究院材料研究所 | Device and method for measuring displacement of object in paramagnetic box based on magnetic mark |
| CN109716072A (en) * | 2016-09-22 | 2019-05-03 | 萨根迪有限公司 | Inductance type transducer equipment |
| US10928223B2 (en) | 2016-09-22 | 2021-02-23 | Sagentia Limited | Inductive sensor device |
| CN109716072B (en) * | 2016-09-22 | 2021-11-02 | 萨根迪有限公司 | Inductive sensor device |
| CN107352241A (en) * | 2017-07-19 | 2017-11-17 | 天奇自动化工程股份有限公司 | Lowering or hoisting gear and its function realizing method with belt fracture warning function |
| CN107352241B (en) * | 2017-07-19 | 2023-09-01 | 天奇自动化工程股份有限公司 | Lifting device with belt breakage early warning function and function implementation method thereof |
| CN110126466A (en) * | 2019-05-16 | 2019-08-16 | 森大（深圳）技术有限公司 | Spray head flares control method, device and computer readable storage medium |
| CN110126466B (en) * | 2019-05-16 | 2020-11-10 | 森大（深圳）技术有限公司 | Spray head flash control method and device and computer readable storage medium |
| WO2021057730A1 (en) * | 2019-09-29 | 2021-04-01 | 桂林广陆数字测控有限公司 | Hybrid positioning electromagnetic induction-type displacement sensor |
| US11965757B2 (en) | 2019-09-29 | 2024-04-23 | Guilin Guanglu Measuring Instrument Co., Ltd. | Hybrid positioning electromagnetic induction displacement sensor |
| WO2023016156A1 (en) * | 2021-08-11 | 2023-02-16 | 苏州汇川控制技术有限公司 | Communication-type magnetic scale read head, magnetic scale apparatus, electric motor module and position measurement method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING RACE AUTOMATION TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LI XINHUA Effective date: 20110425 Owner name: KUNSHAN RACE SENSOR TECHNOLOGY CO., LTD. |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100024 27-102, YANGGUANG HUAYUAN, JINGTONGYUAN, CHAOYANG DISTRICT, BEIJING TO: 100024 27-102, YANGGUANG HUAYUAN INTERNATIONAL APT., JINGTONGYUAN, CHAOYANG DISTRICT, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110425 Address after: 100024 Beijing City, Chaoyang District Jing Yuan Sun Wah Court Residence Internazionale 27-102 Co-patentee after: KUNSHAN RACE SENSOR TECHNOLOGY CO., LTD. Patentee after: Beijing Branch Automation Technology Co., Ltd. Address before: 100024 Beijing City, Chaoyang District Jing Yuan Sun Wah Court 27-102 Patentee before: Li Xinhua |
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| DD01 | Delivery of document by public notice |
Addressee: Beijing Branch Automation Technology Co., Ltd. Document name: Notification to Pay the Fees |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20130609 |