CN201885680U - Precise displacement sensing device - Google Patents
Precise displacement sensing device Download PDFInfo
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- CN201885680U CN201885680U CN2010206508908U CN201020650890U CN201885680U CN 201885680 U CN201885680 U CN 201885680U CN 2010206508908 U CN2010206508908 U CN 2010206508908U CN 201020650890 U CN201020650890 U CN 201020650890U CN 201885680 U CN201885680 U CN 201885680U
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Abstract
The utility model relates to a precise displacement sensing device in the technical field of precise detection, which comprises a fixed frame, one excited deformation body or a plurality of excited deformation bodies, one force converter or a plurality of force converters, an excitation body and a constraint steering mechanism, wherein the excited deformation body and the force converter are arranged in a staggered manner and connected into the fixed frame in series; the constraint steering mechanism is movably arranged in the fixed frame in parallel to the excited deformation body and the force converter; the excitation body is fixedly connected with the constraint steering mechanism; and the deformation direction of the excited deformation body is consistent with the stress direction of the force converter. The precise displacement sensing device has both the functions of displacement and excitation intensity sensing, has the advantages of simple structure, less constituent element and smaller volume, and is convenient to install.
Description
Technical field
The utility model relates to the displacement transducer in a kind of precise detection technology field, specifically is a kind of accurate displacement sensing device that is used to detect precision mechanism based on materials such as permanent magnetism, magnetostriction and piezoelectricity or device compound action.
Background technology
The displacement transducer of traditional approach adopts inductance, electric capacity or laser sensing etc. that straight-line displacement is detected more.The accurately displacement of the accurate moving device of monitoring or system or instrument in real time, raising for the usability optimization of instruments such as precision measurement, superhigh precision machining tool and equipment and runnability is all most important, this also presses for a kind of integrated sensing mechanism, can be used for moving-member integrated, when structure and overall dimensions are not made big change, the system that is moved is had not only can actuation movement but also can be accurately from the value of this motion of perception, make this motion driving system have self-driven, from the intelligent characteristic of perception.But at present there is very big difficulty in integrated incorporate intelligent drives, the displacement mechanism of a kind of like this function of development, and its main cause is not have dependable performance, volume compact, highly sensitive high-performance sensing mechanism.
Find that through retrieval the sensor of the performance the best of Ying Yonging, use most convenient is a laser displacement sensor in the market to prior art.As the LK series laser displacement sensor of Japanese Keyemce company, its sensing accuracy can reach nanometer, and installation and very easy to use, is a kind of laser sensing device of non-contact measurement.But the shortcoming of this device be the realization of sensing must one cover light path devices and light source, make the complex structure of this sensor, volume is big, therefore can not be integrated in the actuation movement equipment of small size, cause under the small running environment of precision, this kind sensing device can not use.
The utility model content
The utility model is at the prior art above shortcomings, a kind of accurate displacement sensing device is provided, its compact conformation, structural strength height, need not conveniently to obtain the sensing electric signal under the situation of power drives, the straight-line displacement of this signal and detected mechanism has direct corresponding relation, transducing signal sensitivity, accurate.As sensing element, it is simple in structure, and convenient integrated use in existing drive system or device can realize driving and the incorporate driving of sensing function, gearshift.Be particularly suitable for integrated application with precision driver and precision electric motor.
The utility model is achieved through the following technical solutions, the utility model comprises: fixed frame, one or more excited target deformable body, one or more power become device, excitation body and constraint guiding mechanism, wherein: excited target deformable body and power change device are crisscross arranged and are connected in series in the fixed frame, the constraint guiding mechanism is movably set in the fixed frame and is parallel to the excited target deformable body and power change device, the excitation body is fixedlyed connected with the constraint guiding mechanism, and the deformation direction of excited target deformable body becomes device with power and is subjected to force direction consistent.
Described fixed frame is the rigid material body.
Described excited target deformable body is the magnetostriction materials body.
Be provided with biasing excitation body between described excited target deformable body and the fixed frame.
Described power becomes device and is piezoelectric material body or piezoelectric sensor.
Described excitation body is permanent-magnet-field body, magnetic conduction excitation body or electric magnetization body.
Be provided with the excitation guide mechanism between described excited target deformable body and the power change device.
When the excitation body was the permanent-magnet-field body, described excitation guide mechanism was two magnetic conductors that are arranged at excited target deformable body two ends respectively; When the excitation body is magnetic conduction excitation body, described excitation guide mechanism biasing magneto excitation body and magnetic conductor or two biasing magneto excitation bodies that are arranged at excited target deformable body two ends respectively for being arranged at excited target deformable body two ends respectively.。
Compared with prior art, the utility model advantage comprises: 1, realized a kind of sensor that has displacement and excitation density sensing concurrently; 2, sensor construction is simple, and building block is few, and volume is less and easy for installation.
Based on above advantage, accurate displacement sensing device of the present utility model is particularly suitable for making driving and sensing integrated intelligent driver or drive displacement sensing device.
Description of drawings
Fig. 1 is embodiment 1 synoptic diagram;
Wherein: (a) being structural representation, (b) is working state schematic representation.
Fig. 2 is embodiment 2 synoptic diagram.
Fig. 3 is embodiment 3 synoptic diagram.
Fig. 4 is embodiment 4 synoptic diagram.
Fig. 5 is embodiment 5 synoptic diagram.
Wherein: (a) for having the sensor synoptic diagram of magnetic conduction excitation body, (b) for having the right sensor synoptic diagram of biasing magneto excitation body.
Fig. 6 is embodiment 6 synoptic diagram.
Embodiment
Below embodiment of the present utility model is elaborated; present embodiment is being to implement under the prerequisite with technical solutions of the utility model; provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Shown in Fig. 1 (a), present embodiment comprises: fixed frame 1, excited target deformable body 2, power become device 3, excitation body 4, constraint guiding mechanism 5, wherein: excited target deformable body 2 is crisscross arranged with power change device 3 and is connected in series in the fixed frame 1, constraint guiding mechanism 5 is movably set in the fixed frame interior 1 and is parallel to excited target deformable body 2 and becomes device 3 with power, excitation body 4 is fixedlyed connected with constraint guiding mechanism 5, and the deformation direction of excited target deformable body 2 becomes device 3 with power and is subjected to force direction consistent.
Described fixed frame 1 is the rigid material body;
Described excited target deformable body 2 can be the magnetostriction materials body;
Described power becomes device 3 and is piezoelectric material body or piezoelectric sensor;
Described excitation body 4 is a permanent magnet;
Described constraint guiding mechanism 5 is slip or rolling or the elastic deformation mechanism that is connected and relies on fixed frame 1 to lead with excitation body 4.
Excited target deformable body 2 is assemblied in the fixed frame 1 with the together initial chucking of power change device 3 and encourages body 4 in the side of excited target deformable body 2 with power change device 3, can be under the support of constraint guiding mechanism 5, relatively excited target deformable body 2 carry out stably near or away from motion, shown in Fig. 1 (a).
When excitation body 4 is a permanent magnet, during gradually near excited target deformable body 2, because excited target deformable body 2 is the magnetostriction materials body, close along with permanent-magnet-field body 4, the magnetic field intensity of its perception permanent-magnet-field body 4 is more and more stronger, cause 2 magnetic elongation of excited target deformable body, but this moment, excited target deformable body 2 is become device 3 chuckings by power, and its elongation strain is done manual work and is converted into the pressure that is pressed on the power change device, the power that is pressed on becomes device 3 on piezoelectric material body/piezoelectric sensor, shown in Fig. 1 (b).Because power becomes device 3 and be piezoelectric material body/piezoelectric sensor, its stressed electric signal that produces, along with encourage body 4 progressively close/away from, promptly 2 excitation densities that can experience of excited target deformable body can progressively strengthen/weaken, and corresponding increase/reduce.Therefore, the electric signal power of the displacement of excitation body 4 and 3 generations of power change device has corresponding relation.So become the intensity or the Strength Changes amount of the electric signal that device 3 produces by detection power, can detect the displacement variable of excitation body 4.So relative to encouraging moving of body 4, institute's utility model device is a kind of linear displacement transducer.
As shown in Figure 2, comprise a plurality of excited target deformable bodys 2 and power in the present embodiment and become device 3, close its position is that a power becomes device 3 between two excited target deformable bodys 2 and be clamped in the fixed frame 1 or two excited target deformable bodys 2 are sandwiched in three power and become between the devices 3.Help producing stronger power varying signal like this, as adopt power change device 3 to be piezoelectric sensor, excited target deformable body 2 is the magnetostriction materials body, and the magnetostriction amount of Chan Shenging piezoelectric signal intensity bigger and that produced is stronger so, and the performance that helps sensor improves and convenient the use.
As shown in Figure 3, in the present embodiment: be provided with a pair of magnetic conductor to 6 between described excited target deformable body 2 and the power change device 3, this magnetic conductor 6 helps to prevent to encourage the excitation of body 4 to leak, help permanent magnetic material excitation body 4 to form closed magnetic circuit as magnetic conductor 6, and make the intensity of excitation body 4 excitation excited target deformable bodys 2 stronger, help the magnetic field intensity that produces as the excited target deformable body 2 that adopts magnetostriction materials higher, make that to become the induction of device 3 as piezoelectric forces sensitiveer, thereby improve the effect of the utility model sensing device.
As shown in Figure 4, in the present embodiment: be provided with a biasing excitation body 7 between described excited target deformable body 2 and the fixed frame 1.This biasing excitation body 7 is connected with excited target deformable body 2, power change device 3 and together initial chucking is assemblied in the fixed frame 1.Because the initial excitation of biasing excitation body 7 acts on excited target deformable body 2, as adopt permanent magnet bias body 7, its magnetic field initial excitation magnetostriction excited target deformable body 2 can be so that the initial magnetic bias strain of the magnetostriction of excited target deformable body 2 be positioned at the linear constant interval of strain.Like this, when excited target deformable body 2 was subjected to the external change magnetic field excitation, sensitivity was higher, caused power to become the power varying signal that device 3 produces, it is higher into the piezoelectric signal sensitivity of piezoelectric sensor to become device 3 as power, thereby makes the sensing device sensing of institute's utility model more accurate and sensitive.
As described in Fig. 5 (a), in the present embodiment: described excitation body is a magnetic conduction excitation body 8, is provided with a magnetic conductor 6 and a biasing magneto excitation body 7 between described excited target deformable body 2 and the power change device 3.Under this kind structure, when magnetic conduction encourages body 8 gradually near excited target deformable body 2, biasing magneto excitation body 7, magnetic conduction excitation body 8 and magnetic conductor are more and more littler to an air-gap that magnetic conductor forms in the magnetic loop in 6, leakage field is fewer and feweri, so magnetic field intensity in magnetic loop that excited target deformable body 2 is sensed by 7 generations of biasing magneto excitation body, be that the excitation density sensed of excited target deformable body 2 is high more, also can sense stronger power varying signal so corresponding power becomes device 3.So, adopting magnetic conduction excitation body 8, its moving displacement also can be perceived.In like manner, based on this principle, magnetic conductor all is replaced by biasing magneto excitation body 7 to 6, shown in Fig. 5 (b).Can realize the displacement sensing function equally.
Embodiment 6
As shown in Figure 6, in the present embodiment: described excitation body is an electromagnetic type excitation body 9, be specially a solenoid, principle and implementation process are with front embodiment, when solenoid fed fixed current, promptly the electromagnetic field that is produced is certain, and was identical with the permanent magnet situation so, the moving displacement of solenoid can be perceived, and make a kind of displacement sensing apparatus.Perhaps, solenoid maintains static, and the strength of current of its feeding changes, and the electromagnetic intensity variation that promptly loads also can be perceived, so displacement sensing apparatus of the present utility model can also be a kind of strength of current sensor.
Displacement sensing mechanism described in the above embodiment, wherein the excited target deformable body is a kind of when being subjected to the external magnetic field excitation, or external heat excitation, or external electrical field excitation, or exterior light is according to excitation, or can produce distortion under the situation of outside liquid or gas flow disturbance excitation, and the degree of this distortion increases with the enhancing of external drive intensity.Simultaneously, it is a kind ofly pressure can be converted to the transducer that electricity, magnetic, look or light change that the power that adopted becomes device, and force transformation is directly proportional with stressed size by the intensity of the signal of electricity, magnetic, look or light.In addition, the excitation body is a kind of object that can produce magnetic or heat or electricity or light or fluid excitation.Therefore, when excited target deformable body and power become the device chucking and are assemblied in the fixed frame, when encouraging body along retraining guiding mechanism by close excited target deformable body far away, though self excitation density of excitation body is constant, but along with encouraging the progressively close of body, the excitation density that the excited target deformable body can be experienced can be more and more stronger, thereby its possible elongation is increasing, but this elongation can be subjected to the prevention that captured power becomes device, cause the excited target deformable body that power is become the device workmanship and produces pressure, become the principle of work of device based on power, this pressure will produce one, magnetic, the signal of look or light, and the external drive intensity that the size of this signal and excited target deformable body are experienced promptly encourages the degree of body near the excited target deformable body, just encourages the displacement of body to become corresponding relation.So become the intensity or the Strength Changes amount of the signal of electricity that device produces or magnetic or look or light by detection power, can detect the displacement variable of excitation body.So relative to encouraging moving of body, more than device can be realized the straight-line displacement sensing measurement;
In like manner, when the relative position of excitation body and excited target deformable body constant, when but the excitation density of excitation body self changes, also can make the excited target deformable body that power is become device and produce pressure, this pressure will produce the corresponding electricity or the signal of magnetic or look or light, and the size of this signal becomes corresponding relation with the inner excitation density that produces of excitation body.So become the intensity (Strength Changes amount) of the signal of electricity that device produces or magnetic or look or light by detection power, can detect the variable quantity that the excitation body applies excitation density.So encourage body to apply excitation relatively, more than device also can be realized the excitation density sensing measurement.
Claims (6)
1. accurate displacement sensing device, it is characterized in that, comprise: fixed frame, one or more excited target deformable body, one or more power become device, excitation body and constraint guiding mechanism, wherein: excited target deformable body and power change device are crisscross arranged and are connected in series in the fixed frame, the constraint guiding mechanism is movably set in the fixed frame and is parallel to the excited target deformable body and power change device, the excitation body is fixedlyed connected with the constraint guiding mechanism, and the deformation direction of excited target deformable body becomes device with power and is subjected to force direction consistent.
2. accurate displacement sensing device according to claim 1 is characterized in that, described power becomes device and is piezoelectric material body or piezoelectric sensor.
3. accurate displacement sensing device according to claim 1 is characterized in that, is provided with biasing excitation body between described excited target deformable body and the fixed frame.
4. accurate displacement sensing device according to claim 1 is characterized in that, described excitation body is permanent-magnet-field body, magnetic conduction excitation body or electric magnetization body.
5. accurate displacement sensing device according to claim 1 is characterized in that, is provided with the excitation guide mechanism between described excited target deformable body and the power change device.
6. according to claim 4 or 5 described accurate displacement sensing devices, it is characterized in that when the excitation body was the permanent-magnet-field body, described excitation guide mechanism was two magnetic conductors that are arranged at excited target deformable body two ends respectively; When the excitation body is magnetic conduction excitation body, described excitation guide mechanism biasing magneto excitation body and magnetic conductor or two biasing magneto excitation bodies that are arranged at excited target deformable body two ends respectively for being arranged at excited target deformable body two ends respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206508908U CN201885680U (en) | 2010-12-10 | 2010-12-10 | Precise displacement sensing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206508908U CN201885680U (en) | 2010-12-10 | 2010-12-10 | Precise displacement sensing device |
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| CN201885680U true CN201885680U (en) | 2011-06-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095358A (en) * | 2010-12-10 | 2011-06-15 | 上海交通大学 | Precise displacement transducer |
| CN103196359B (en) * | 2013-04-03 | 2016-04-20 | 广州广电运通金融电子股份有限公司 | A kind of measuring method of gap and device |
-
2010
- 2010-12-10 CN CN2010206508908U patent/CN201885680U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095358A (en) * | 2010-12-10 | 2011-06-15 | 上海交通大学 | Precise displacement transducer |
| CN103196359B (en) * | 2013-04-03 | 2016-04-20 | 广州广电运通金融电子股份有限公司 | A kind of measuring method of gap and device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20161210 |