CN206920467U - High-precision acceleration transducer based on reflective gratings chi - Google Patents
High-precision acceleration transducer based on reflective gratings chi Download PDFInfo
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- CN206920467U CN206920467U CN201720754932.4U CN201720754932U CN206920467U CN 206920467 U CN206920467 U CN 206920467U CN 201720754932 U CN201720754932 U CN 201720754932U CN 206920467 U CN206920467 U CN 206920467U
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- guide rail
- reflective gratings
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- acceleration transducer
- gratings chi
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Abstract
The utility model discloses a kind of high-precision acceleration transducer based on reflective gratings chi, including：Shell, guide rail, signal generation module, reflective gratings chi, position-limit mechanism, signal processing module, bluetooth module, power module, top cover and guide rail slide block, signal generation module is pasted inside the housing, guide rail is fixed on boss inside the housing, guide rail slide block is equipped with guide rail, the both ends of guide rail respectively have a position-limit mechanism for being used for limiting guide rail slide block slippage, reflective gratings chi is pasted onto below guide rail slide block, signal processing module and power module are located at the both sides of outer casing bottom, bluetooth module is welded on signal processing module, top cover is provided with the top of shell.The utility model designs simple, compact-sized, high sensitivity, cost is relatively low and acceleration is measured in a manner of Bluetooth transmission, and the acceleration transducer of generation costly can be replaced in some fields.
Description
Technical field
Acceleration transducer technical field is the utility model is related to, more particularly to a kind of adding based on reflective gratings chi
Velocity sensor.
Background technology
Acceleration transducer is a kind of electronic equipment that can measure acceleration, and high-accuracy accelerometer also can apply to fly
In the inertial navigation system of machine or guided missile, it has the functions such as attitude detection, motion detection.
Accurate reflective gratings chi is usually applied to closing for Digit Control Machine Tool as a kind of critical elements of linear displacement detecting
In ring servo-drive system, feedback device is measured as a kind of straight-line displacement, it is digital pulse signal that it, which measures the signal of output, can be entered
The flexible digitized processing of row, has that detection range is big, accuracy of detection is high, fast response time, strong antijamming capability etc. are many excellent
Point.
Grating can apply to the measurement of acceleration, be currently based in the acceleration transducer of grating most of use
Fiber grating, acceleration information, the survey of center reflection wavelength change are obtained by measuring the center reflection wavelength of fiber grating
Amount needs to use special measuring instrument, such as fiber spectrometer, wavelength demodulation device etc., and this quasi-instrument is typically relatively expensive, nothing
Measurement cost is added in shape.Therefore, a kind of acceleration transducer of the reflective gratings chi based on low cost is designed, is had very
Good application and popularization value.
Utility model content
The utility model mainly solving the technical problems that provide a kind of acceleration transducer based on reflective gratings chi,
It is relatively low to design simple, compact-sized, high sensitivity, cost.
In order to solve the above technical problems, the technical scheme that the utility model uses is：There is provided a kind of based on reflective
The acceleration transducer of grating scale, including：Shell, guide rail, signal generation module, reflective gratings chi, position-limit mechanism, at signal
Module, bluetooth module, power module, top cover and guide rail slide block are managed, signal generation module is pasted inside the housing, and guide rail is fixed on
On the boss of enclosure, guide rail slide block is equipped with guide rail, respectively there is one to be used for limiting guide rail slide block cunning at the both ends of guide rail
The position-limit mechanism of journey, reflective gratings chi are pasted onto below guide rail slide block, and signal processing module and power module are located at shell bottom
The both sides in portion, bluetooth module are welded on signal processing module, and top cover is provided with the top of shell.
In one preferred embodiment of the utility model, described position-limit mechanism includes spring and the bullet for fixed spring
Spring block.
In one preferred embodiment of the utility model, described guide rail is fixed by screws in the boss of enclosure
On.
In one preferred embodiment of the utility model, described reflective gratings chi is steel belt grating chi, grating pitch
20μm。
In one preferred embodiment of the utility model, described spring is circular cone compression spring, and spring is in during installation
Pre strained state.
In one preferred embodiment of the utility model, described power module is the circuit board for being provided with button cell,
It is connected by FFC flexible flat cables with signal processing module and signal generation module.
The beneficial effects of the utility model are：It is relatively low that the utility model designs simple, compact-sized, high sensitivity, cost
And acceleration is measured in a manner of Bluetooth transmission, it can replace the acceleration transducer of generation costly in some fields.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Other accompanying drawings are obtained, wherein：
The overall structure figure that it is the preferred embodiment of the utility model one that Fig. 1, which is,；
The structure that Fig. 2 is Fig. 1 disassembles schematic diagram；
The mark of each part is as follows in accompanying drawing：1st, shell, 2, guide rail, 3, signal generation module, 4, reflective gratings chi, 5,
Spring block, 6, spring, 7, signal processing module, 8, bluetooth module, 9, power module, 10, top cover, 11, guide rail slide block.
Embodiment
The technical scheme in the embodiment of the utility model will be clearly and completely described below, it is clear that described
Embodiment is only part of the embodiment of the present utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is belonged to
The scope of the utility model protection.
Fig. 1 to Fig. 2 is referred to, the utility model embodiment includes：
A kind of acceleration transducer based on reflective gratings chi, including：It is shell 1, guide rail 2, signal generation module 3, anti-
Formula grating scale 4, position-limit mechanism, signal processing module 7, bluetooth module 8, power module 9, top cover 10 and guide rail slide block 11 are penetrated, is believed
Number generation module 3 is pasted onto inside shell 1, and guide rail 2 is fixed by screws on the boss inside shell 1, is equipped with guide rail 2
Guide rail slide block 11, the both ends of guide rail 2 respectively have a position-limit mechanism for being used for limiting guide rail slide block slippage, reflective gratings chi 4
It is pasted onto below guide rail slide block 11, signal processing module 7 and power module 9 are located at the both sides of the bottom of shell 1, and bluetooth module 8 welds
It is connected on signal processing module 7, the top of shell 1 is provided with top cover 10, and described position-limit mechanism includes spring 6 and for fixing
The spring block 5 of spring 6.
Wherein, the size of shell 1 is 40mm × 22mm × 11mm, and the size of top cover 10 is 40mm × 22mm × 2mm；Described leads
Rail is accurate decussation roller guideway, and decussation roller guideway selects the GRD01-20 decussation roller guide rails of GMT companies, maximum row
Journey 8mm, there is the advantages of high rigidity, low noise, its resistance that rubs is very small and startup friction resistance is resisted with friction of motion
Almost there is no difference, correct tracking is also can guarantee that even if micro movement, disclosure satisfy that high-precision straight line in this application
Movement needs；Described reflective gratings chi 4 is steel belt grating chi, and 20 μm of grating pitch, described spring 6 is that circular cone compresses bullet
Spring, spring 6 is in Pre strained state during installation；For bluetooth module 8 from the CC2540 model Bluetooth chips of TI companies, it incorporates bag
Containing microcontroller, host side and application program on the one element, it is the real system level chip of a super low-power consumption, even in
Also the use of long period is can guarantee that under button cell electric power thus supplied；Described power module 9 is the electricity for being provided with button cell
Road plate, button cell use model Panasonic CR2032 button cell, and voltage 3V, diameter 20mm, thickness 3.2mm, cost is low,
Power supply is convenient and easily changes, and power module 9 is powered to signal generation module 3, signal processing module 7 and bluetooth module 8 simultaneously, it
Between connected by FFC flexible flat cables；Described signal generation module 3 while integrated optical source, indication grating and photoelectricity
Sensor.
Acceleration transducer based on reflective gratings chi needs to demarcate reflective gratings chi before dispatching from the factory, because not
There is fine difference in same reflective gratings chi, these differences need to carry out error compensation in a program, therefore need to be directed to each
Individual specific reflective gratings chi is required for being demarcated.The demarcation of reflective gratings chi mainly includes two parts：1st, physics knot
The demarcation of relative position between the demarcation of structure, mainly reflective gratings chi 4 and signal generation module 3, between them between
Gap has an optimum value；2nd, the demarcation of grating signal processing routine, mainly error compensation.
After demarcation is good, the acceleration transducer based on reflective gratings chi is arranged on object under test, tried one's best during installation
Make the glide direction of guide rail slide block 11 consistent with the acceleration direction that needs measure, then, turn on the power module and bluetooth module, lead to
Crossing bluetooth makes the acceleration transducer based on reflective gratings chi be communicated with external portable notebook computer.
The basic functional principle of high-precision acceleration transducer of the utility model based on reflective gratings chi：
First, the micro-displacement amount x of guide rail slide block 11 is measured by reflective gratings chi 4, then the spring known to
Coefficient k, the size F=- kx for the module inertia force that guide rail slide block 11 and reflective gratings chi 4 form is obtained, finally, according to guide rail
The quality of sliding block 11 and the comprising modules of reflective gratings chi 4 is m and obtained F, it can be deduced that acceleration is a=F/m.
Measure the basic process of acceleration：First, the vibration of measured object is transmitted to the acceleration based on reflective gratings chi and passed
Sensor shell 1, the acceleration transducer based on reflective gratings chi will vibrate with testee；Then, due to bullet
The collective effect of spring 6 and guideway, guide rail slide block 11 will be vibrated back and forth along the direction of guide rail 2, and guide rail 2 serves limitation
The effect of the direction of motion of guide rail slide block 11, it ensure that the direction of motion of the reflective gratings chi 4 below guide rail slide block 11
And the stabilization of the relative gap between reflective gratings chi 4 and signal generation module 3, it is stable beneficial to output and high resolution
Grating signal, at this moment reflective gratings chi 4 also produced relative to signal generation module 3 identical relative displacement change, signal life
The grating signal of generation is transferred to signal processing module 7 into module 3, signal processing module 7 is handled grating signal, obtained
To displacement information；Then, according to Hookean elasticity law, the power that spring 6 is subject to is bigger, and deformation is bigger, in elastic limit, spring
There is certain proportionate relationship, i.e. F=- kx in length x variable quantity and its power F for being subject to, wherein k is the elastic coefficient, it by
The property of material determines that negative sign represents that elastic force caused by spring extends with it（Or compression）It is in opposite direction.Thus can be with
Power F is obtained by displacement information before, finally, according to Newton's second law, the acceleration a of object size is with suffered by object
Bonding force F is directly proportional, and the quality m with object is inversely proportional, and the direction of acceleration is identical with the direction of bonding force, that is, calculates acceleration
A=F/m is spent, quality m is reflective gratings chi 4 and the common quality of guide rail slide block 11；Acceleration information is sent out by bluetooth module 8
Send out.
The beneficial effect of high-precision acceleration transducer of the utility model based on reflective gratings chi is：
1st, main scale grating selects reflective gratings chi, and easily fabricated and precision is high, be advantageous to improve detection sensitivity and
Precision；20 microns of grating scale pitch, resolution ratio is up to 50nm, high resolution after subdivision.
2nd, light source, indication grating and photoelectric sensor are integrated with simultaneously on signaling module, there is compact-sized, sensor body
The advantages that product small, strong antijamming capability, it can be widely used for various detection bad environments and strict to size sensor requirement
Engineering field.
3rd, reflective main scale is arranged on high-accuracy decussation roller guideway, resistance to overturning is high.
4th, the trouble using cable is eliminated, overall sensor size is small as mode signal output from bluetooth module.
Embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, it is every
The equivalent structure or equivalent flow conversion made using the utility model description, or directly or indirectly it is used in other phases
The technical field of pass, similarly it is included in scope of patent protection of the present utility model.
Claims (8)
- A kind of 1. acceleration transducer based on reflective gratings chi, it is characterised in that including：Shell, guide rail, signal generation mould Block, reflective gratings chi, position-limit mechanism, signal processing module, bluetooth module, power module, top cover and guide rail slide block, signal life To be pasted inside the housing into module, guide rail is fixed on boss inside the housing, is equipped with guide rail slide block on guide rail, and the two of guide rail End respectively has a position-limit mechanism for being used for limiting guide rail slide block slippage, and reflective gratings chi is pasted onto below guide rail slide block, believed Number processing module and power module are located at the both sides of outer casing bottom, and bluetooth module is welded on signal processing module, the top of shell Portion is provided with top cover.
- 2. the acceleration transducer according to claim 1 based on reflective gratings chi, it is characterised in that described is spacing Mechanism includes spring and the spring block for fixed spring.
- 3. the acceleration transducer according to claim 1 based on reflective gratings chi, it is characterised in that described guide rail It is fixed by screws on the boss of enclosure.
- 4. the acceleration transducer according to claim 1 based on reflective gratings chi, it is characterised in that described guide rail For accurate decussation roller guideway.
- 5. the acceleration transducer according to claim 1 based on reflective gratings chi, it is characterised in that described reflection Formula grating scale is steel belt grating chi, 20 μm of grating pitch.
- 6. the acceleration transducer according to claim 2 based on reflective gratings chi, its feature is in described spring is Circular cone compression spring, spring is in Pre strained state during installation.
- 7. the acceleration transducer according to claim 1 based on reflective gratings chi, it is characterised in that described power supply Module is to be provided with the circuit board of button cell, passes through FFC flexible flat cables and signal processing module and signal generation module Connection.
- 8. the acceleration transducer according to claim 1 based on reflective gratings chi, it is characterised in that described signal Generation module while integrated optical source, indication grating and photoelectric sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720754932.4U CN206920467U (en) | 2017-06-27 | 2017-06-27 | High-precision acceleration transducer based on reflective gratings chi |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720754932.4U CN206920467U (en) | 2017-06-27 | 2017-06-27 | High-precision acceleration transducer based on reflective gratings chi |
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| Publication Number | Publication Date |
|---|---|
| CN206920467U true CN206920467U (en) | 2018-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720754932.4U Active CN206920467U (en) | 2017-06-27 | 2017-06-27 | High-precision acceleration transducer based on reflective gratings chi |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091941A (en) * | 2017-06-27 | 2017-08-25 | 常州瑞丰特科技有限公司 | High-precision acceleration transducer based on reflective gratings chi |
-
2017
- 2017-06-27 CN CN201720754932.4U patent/CN206920467U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091941A (en) * | 2017-06-27 | 2017-08-25 | 常州瑞丰特科技有限公司 | High-precision acceleration transducer based on reflective gratings chi |
| CN107091941B (en) * | 2017-06-27 | 2023-10-27 | 常州瑞丰特科技有限公司 | High-precision acceleration sensor based on reflection type grating ruler |
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