CN201145588Y - Device for measuring axle rotating angle - Google Patents
Device for measuring axle rotating angle Download PDFInfo
- Publication number
- CN201145588Y CN201145588Y CNU2007201960545U CN200720196054U CN201145588Y CN 201145588 Y CN201145588 Y CN 201145588Y CN U2007201960545 U CNU2007201960545 U CN U2007201960545U CN 200720196054 U CN200720196054 U CN 200720196054U CN 201145588 Y CN201145588 Y CN 201145588Y
- Authority
- CN
- China
- Prior art keywords
- measured
- signal
- anglec
- scrambler
- measurement mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a device for measuring the rotation angle of a shaft, comprising a signal acquisition unit which is used for acquiring the rotation displacement of the shaft to be measured, a signal processing unit which is used for processing signals acquired by the signal acquisition unit, and a converting and calculating unit which is sued for converting the signals processed by the signal processing unit into angle values, wherein, the signal acquisition unit comprises an encoder which is externally tangent to the shaft to be measured and driven to rotate by the shaft. The rotation angle of the shaft to be measured linearly corresponds to the length of an external circular arc rotated by the shaft, thereby the rotation angle can be indirectly measured through measurement of the arc length rotated by the shaft; and the angle variation of the shaft to be measured can be obtained after processing of the signal processing unit and conversion of the converting and calculating unit, thereby accurate measurement of the rotation angle of the shaft to be measured is realized.
Description
Technical field
The utility model relates to a kind of measurement mechanism of the anglec of rotation, relates in particular to a kind of device of optical encoder to measuring than the major diameter axle anglec of rotation that use.
Background technology
At present, use in the rotating angle measurement apparatus of optical encoder, generally adopt two kinds of optical encoders: a kind of is the real axis scrambler, adopt the rotating angle measurement apparatus of this type of scrambler, an axle is stretched out at real axis scrambler center, by shaft coupling or other connected mode and measured axis formation linkage; When measured axis rotated, the axle of the scrambler that is attached thereto and then rotated, and drove the corresponding angle of scrambler ISN disc spins, output angle signal behind the number of division that turns on the photoelectric scanning head scanning code-disc; Another kind is the sky shaft encoder, adopt the rotating angle measurement apparatus of this type of scrambler, the scrambler center of adopting is an empty axle, after measured axis passes empty axle, by ring nut etc. with the rotatable empty axle of scrambler with fixing on, when measured axis rotates, the empty axle rotation therewith of scrambler, and the code-disc rotation of drive scrambler inside, by scrambler output angle signal; Two kinds of measurement mechanisms all exist to be installed and inconvenient problem with use, because the zero degree pulse signal of measured axis and rotational pulse signal are all taken from same rotary encoder, the recurrent pulse number needs to set in advance, so, these two kinds of rotating angle measurement apparatus require rotation partially sign indicating number devices must be installed on the measured axis or be installed in engagement than being on other of 1: 1; And, when measured axis diameter during greater than Φ 100MM, preceding a kind of measurement mechanism is limited by the level of processing restriction of web members such as shaft coupling, the back is a kind of to be limited by the sky aperture axis and to increase and to cause code-disc to increase, restrictions such as photoetching technique difficulty increase, all can't realize adopting conventional coders to realize then making the cost of entire measuring device increase greatly if use the specific coding device instead to the measurement of diameter greater than the axle anglec of rotation of Φ 100MM.
Publication number " CN 2499794 " name is called " a kind of measurement of angle " and discloses a kind of measurement of angle device in China's patent application prospectus, a kind of measurement of angle device of this kind mainly comprises: rotary encoder, single-chip microcomputer, phase detector, counter, register, photoelectric sensor, monostable trigger; Wherein, rotary encoder is installed on the motor shaft, and motor shaft is connected by belt gear with measured axis; When motor shaft rotated, there was the fixed engagement ratio in rotary encoder with measured axis, and when measured axis rotated, rotary encoder produced the A of dutycycle 50%, B two-phase pulse, mutually leading 90 degree of A during forward rotation, mutually leading 90 degree of B during backward rotation.Paste a light mark in the zero degree position of measured axis, when the light mark turned over photoelectric sensor, a photoelectric sensor positive pulse of output also sent instrument to; This kind measurement of angle device complex structure, the signal of rotary encoder sampling is the angle signal that axle to be measured turns over, and because rotary encoder adopts belt and measured axis ways of connecting, because there is belt slip, the influence of the factor that is stretched or the like causes the result who measures inaccurate.
The utility model content
The technical problems to be solved in the utility model provides a kind of measurement mechanism that adopts conventional coders, can accurately measure the anglec of rotation of axle to be measured.
Goal of the invention of the present utility model is achieved through the following technical solutions:
The measurement mechanism of a kind of anglec of rotation of the present utility model, it comprises: the signal gathering unit that is used to gather axis signal to be measured, be used for signal processing unit that the signal of this signal gathering unit collection is handled, wherein: described signal gathering unit is the signal gathering unit that is used to gather axle swing offset amount to be measured, and this kind measurement mechanism also comprises: the conversion of signals that is used for that this signal processing unit processes is crossed is the conversion Calculation unit of angle value; Because the rotational angle of axle to be measured is linear corresponding with the outer ring arc length of its rotation, so can measure the anglec of rotation indirectly by the arc length that measurement axis is rotated, through after the processing of signal processing unit, transform the variable quantity that obtains shaft angle degree to be measured by the conversion Calculation unit, thereby realize the anglec of rotation of axle to be measured is accurately measured.
Wherein, described signal gathering unit comprises: circumscribed with axle to be measured, by the scrambler of its driven rotary; Circumscribed by adopting with axle to be measured, by the scrambler of its driven rotary, can collect the swing offset amount of axle to be measured, the outer ring arc length of the rotation of axle rotational angle correspondence promptly to be measured.
Further, be arranged with on the central shaft of described scrambler and the circumscribed disk of axle to be measured, this disk is concentric with the central shaft of scrambler; The mode of employing sheathed and disk that axle to be measured is circumscribed on the central shaft of scrambler after making axle to be measured drive this disk to rotate, and then drives scrambler internal code disc spins, thereby produces angle signal; And, can select the different disk of diameter according to the diameter of axle to be measured; Adopt the disk concentric, can avoid because the eccentricity of central axis of this disk and scrambler causes the scrambler sampling to produce deviation with the scrambler central shaft.
Described disk is the disk that the bigger resilient material of surfaceness is made; The disk that adopts the bigger resilient material of surfaceness to make, the friction factor in the time of can increasing disk and contact with measured axis, and can cushion so that disk can produce certain elastic deformation.
Described scrambler is an increment type real axis scrambler.
On the said structure basis, wherein:
The diameter of described disk is not more than 1/3rd of shaft diameter to be measured; Adopt the diameter of disk to be not more than 1/3rd mode of shaft diameter to be measured, under the constant prerequisite of scrambler revolution respective pulses number, axle to be measured rotates a circle, corresponding encoder disk need be rotated three circles or more, approximate being equal to improved several three times even more of scrambler revolution respective pulses, makes that the sampling of scrambler is more accurate.
As the further improvement of such scheme, described signal processing unit comprises: be used for the encoder pulse signal that the signal gathering unit scrambler produces is carried out filtering and amplifying signal processing module; Through the processing of signal processing module, eliminated the clutter in the encoder pulse signal, and signal has been amplified, so that further signal is handled.
Described signal processing unit comprises: be used for data acquisition card module that the pulse signal of handling through described signal processing module is modulated; Pulse signal becomes the signal that can carry out computing for the conversion Calculation unit through the modulation of this data acquisition card module.
As the further improvement of such scheme, described data acquisition card module is the data acquisition card module with quadruple sub-circuit; Adopt the quadruple sub-circuit can realize the high power of pulse signals in the pulse signal cycle is segmented, thereby improve the resolving power and the measuring accuracy of data acquisition card module; Concrete principle is: for the incremental encoder of the most normal use, because the scrambler output pulse signal is generally A, and B, the Z three-phase signal, A wherein, B phase signals phase phasic difference 90 degree, and this comes direction indication to rely on phase differential; The Z signal only provides a reference mark signal.The quadruple sub-circuit is to A, and the rising edge of B phase all triggers, and the sampling period just is compressed to originally 1/4th like this, so the umber of pulse of revolution correspondence increases by four times, measuring accuracy also just equals to have improved four times.
As the further improvement of such scheme, described conversion Calculation unit is to be used for and will to be converted to the PC of corresponding angle value through the pulse signal of described data acquisition card module modulation, through computing.
Further, the measurement mechanism of the described axle anglec of rotation comprises: the display unit that the angle value that is used for obtaining through described conversion Calculation cell translation shows.
The measurement mechanism of a kind of anglec of rotation of the present utility model, circumscribed by adopting with axle to be measured, by the scrambler of its driven rotary, can collect the swing offset amount of axle to be measured, through after the processing of signal processing unit, transform the variable quantity that obtains shaft angle degree to be measured by the conversion Calculation unit, thereby realize the anglec of rotation of axle to be measured is accurately measured; This kind measurement mechanism need not adopt the specific coding device as signal gathering unit, has reduced cost; Than adopting rotary encoder to be installed on the motor shaft, motor shaft and measured axis are by the angle measurement unit of belt gear connected mode, and structure is simpler, and overcome because there is belt slip, the factor that is stretched or the like causes the influence to the result who measures, and is more reliable.
Description of drawings
In order to be easy to explanation, the utility model is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is the structural principle block diagram of the measurement mechanism of a kind of anglec of rotation of the utility model;
Fig. 2 is the structural representation of signal gathering unit of the measurement mechanism of a kind of anglec of rotation of the utility model;
Fig. 3 is the structural representation of Fig. 2 other direction;
Fig. 4 is the measuring principle synoptic diagram of the measurement mechanism of a kind of anglec of rotation of the utility model.
Embodiment
See also Fig. 1 and shown in Figure 4, the measurement mechanism of a kind of anglec of rotation of the present utility model, it comprises: the signal gathering unit that is used to gather axle swing offset amount to be measured, be used for signal processing unit that the signal of this signal gathering unit collection is handled, the conversion of signals that is used for that this signal processing unit processes is crossed is the conversion Calculation unit of angle value, wherein, described signal gathering unit comprises: circumscribed with axle to be measured, by the scrambler of its driven rotary; Axle rotational angle to be measured is linear corresponding with the outer ring arc length of its rotation, so can measure the anglec of rotation indirectly by the arc length that measurement axis is rotated, circumscribed by adopting with axle to be measured, by the scrambler of its driven rotary, can collect the swing offset amount of axle to be measured, through after the processing of signal processing unit, transform the variable quantity that obtains shaft angle degree to be measured by the conversion Calculation unit, thereby realize the anglec of rotation of axle to be measured is accurately measured; The scrambler that adopts in this embodiment is an increment type real axis scrambler.
The measurement mechanism of the axle anglec of rotation in this embodiment also comprises: the display unit that the angle value that is used for obtaining through described conversion Calculation cell translation shows.
In this embodiment, as shown in Figure 2 to Figure 3, be arranged with on the central shaft 1 of scrambler and to be measured 3 circumscribed disk 2, this disk 2 is concentric with the central shaft 1 of scrambler; The mode of the disk 2 that employing sheathed and axle to be measured 3 on the central shaft 1 of scrambler is circumscribed after making axle 3 to be measured drive this disk 2 to rotate, and then drives the inner code-disc (not shown) rotation of scrambler, thereby produces angle signal; And, can select the different disk 2 of diameter according to the diameter of axle 3 to be measured; Adopt the disk 2 concentric, can avoid because central shaft 1 off-centre of this disk 2 and scrambler causes scrambler sampling generation deviation with scrambler central shaft 1.
The disk that disk 2 is made for the bigger resilient material of surfaceness; The disk 2 that adopts the bigger resilient material of surfaceness to make, friction factor in the time of can increasing disk and contact with measured axis, and can be so that disk can produce the certain elastic deformation buffering, in this embodiment, polyester material is adopted in the outer ring of disk 2.
In this embodiment, the diameter of disk 2 is not more than 1/3rd of axle 3 diameters to be measured; Adopt the diameter of disk 2 to be not more than 1/3rd mode of axle 3 diameters to be measured, under the constant prerequisite of scrambler revolution respective pulses number, axle to be measured rotates a circle, corresponding encoder disk need be rotated three circles or more, approximate being equal to improved several three times even more of scrambler revolution respective pulses, makes that the sampling of scrambler is more accurate; Therefore, the diameter of axle 3 to be measured is bigger than more with the diameter of disk 2, and then the sampling of scrambler is just accurate more.
In this embodiment, signal processing unit comprises: be used for the encoder pulse signal that the signal gathering unit scrambler produces is carried out filtering and amplifying signal processing module; The encoder pulse signal has been eliminated the clutter in the encoder pulse signal, and signal has been amplified, so that further signal is handled through the processing of signal processing module; This signal processing unit also comprises: be used for data acquisition card module that the pulse signal of handling through described signal processing module is modulated; Pulse signal becomes the signal that can carry out computing for the conversion Calculation unit through the modulation of this data acquisition card module.
Above-mentioned data acquisition card module is the data acquisition card module with quadruple sub-circuit; Adopt the quadruple sub-circuit can realize the high power of pulse signals in the pulse signal cycle is segmented, thereby improve the resolving power and the measuring accuracy of data acquisition card module; Concrete principle is: for the incremental encoder of the most normal use, because the scrambler output pulse signal is generally A, and B, the Z three-phase signal, A wherein, B phase signals phase phasic difference 90 degree, and this comes direction indication to rely on phase differential; The Z signal only provides a reference mark signal.The quadruple sub-circuit is to A, and the rising edge of B phase all triggers, and the sampling period just is compressed to originally 1/4th like this, so the umber of pulse of revolution correspondence increases by four times, measuring accuracy also just equals to have improved four times.
The conversion Calculation unit is to be used for and will to be converted to the PC of corresponding angle value through the pulse signal of described data acquisition card module modulation, through computing.
With reference to Fig. 4, the measuring principle of the measurement mechanism of a kind of anglec of rotation of the utility model is as follows:
As shown in Figure 4, axle to be measured 3 circles rotate a angles, and then the arc length L that turns over of its correspondence is:
L＝2πR×(a/360)
L1＝L×(R/r)
If the scrambler revolution is output as N pulse, then the umber of pulse N1 of arc length L1 correspondence is:
N1＝(L1/2πr)×N
Then be through the umber of pulse N2 after the segmentation of quadruple sub-circuit 4 frequencys multiplication in the data acquisition card module:
N2＝N1×4
Umber of pulse N2 according to scrambler is gathered in personal computer, by the reverse computing of the formula that provides according to above-mentioned principle, just can obtain the angle that measured axis turns over.
The embodiment of the above is a better embodiment of the present utility model; be not to limit concrete practical range of the present utility model with this; for example; adopt scrambler also can adopt the real axis absolute type encoder; personal computer also can replace with known industrial computer; or the like, the equivalence that all shapes according to the utility model, structure are done changes all in protection domain of the present utility model.
Claims (10)
1. the measurement mechanism of an axle anglec of rotation, it comprises: the signal gathering unit that is used to gather axis signal to be measured, be used for signal processing unit that the signal of this signal gathering unit collection is handled, it is characterized in that: described signal gathering unit is the signal gathering unit that is used to gather axle swing offset amount to be measured, and this kind measurement mechanism also comprises: the conversion of signals that is used for that this signal processing unit processes is crossed is the conversion Calculation unit of angle value.
2. the measurement mechanism of a kind of anglec of rotation according to claim 1, it is characterized in that: described signal gathering unit comprises: circumscribed with axle to be measured, by the scrambler of its driven rotary.
3. the measurement mechanism of a kind of anglec of rotation according to claim 2 is characterized in that: be arranged with on the central shaft of described scrambler and the circumscribed disk of axle to be measured, this disk is concentric with the central shaft of scrambler.
4. the measurement mechanism of a kind of anglec of rotation according to claim 2, it is characterized in that: described scrambler is an increment type real axis scrambler.
5. the measurement mechanism of a kind of anglec of rotation according to claim 3, it is characterized in that: the diameter of described disk is not more than 1/3rd of shaft diameter to be measured.
6. the measurement mechanism of a kind of anglec of rotation according to claim 3, it is characterized in that: described disk is the disk that the bigger resilient material of surfaceness is made.
7. the measurement mechanism of a kind of anglec of rotation according to claim 2, it is characterized in that: described signal processing unit comprises: be used for the encoder pulse signal that the signal gathering unit scrambler produces is carried out filtering and amplifying signal processing module.
8. the measurement mechanism of a kind of anglec of rotation according to claim 7, it is characterized in that: described signal processing unit comprises: be used for data acquisition card module that the pulse signal of handling through described signal processing module is modulated.
9. the measurement mechanism of a kind of anglec of rotation according to claim 8 is characterized in that: described data acquisition card module be data acquisition card module with quadruple sub-circuit.
10. the measurement mechanism of a kind of anglec of rotation according to claim 9 is characterized in that: described conversion Calculation unit is to be used for being converted to the PC of corresponding angle value through the pulse signal of described data acquisition card module modulation, through computing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201960545U CN201145588Y (en) | 2007-12-14 | 2007-12-14 | Device for measuring axle rotating angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201960545U CN201145588Y (en) | 2007-12-14 | 2007-12-14 | Device for measuring axle rotating angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201145588Y true CN201145588Y (en) | 2008-11-05 |
Family
ID=40082472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201960545U Expired - Fee Related CN201145588Y (en) | 2007-12-14 | 2007-12-14 | Device for measuring axle rotating angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201145588Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445563A (en) * | 2011-09-22 | 2012-05-09 | 上海三一重机有限公司 | Excavator rotating speed and rotating braking angle testing device and application method thereof |
| CN107291669A (en) * | 2016-03-30 | 2017-10-24 | 北京天威诚信电子商务服务有限公司 | The electronic composition method and device that a kind of word is divided equally along oval circular arc |
-
2007
- 2007-12-14 CN CNU2007201960545U patent/CN201145588Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445563A (en) * | 2011-09-22 | 2012-05-09 | 上海三一重机有限公司 | Excavator rotating speed and rotating braking angle testing device and application method thereof |
| CN107291669A (en) * | 2016-03-30 | 2017-10-24 | 北京天威诚信电子商务服务有限公司 | The electronic composition method and device that a kind of word is divided equally along oval circular arc |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106706012B (en) | Coding disk, photoelectric measuring angular encoder and its working method using the coding disk | |
| EP2065682B1 (en) | Angle-measuring device with an absolute-type disk capacitive sensor | |
| CN101723213B (en) | SinCos coder based method for detecting position and speed | |
| CN102997887B (en) | A kind of angle sensor detector methods of multidimensional number and device | |
| CN206300667U (en) | Coding disk, the photoelectric measuring angular encoder using the coding disk | |
| CN102981016A (en) | Processing system and method for detecting rotating speed of rotating object | |
| CN102087296B (en) | Motor speed measurement sensor | |
| CN201145588Y (en) | Device for measuring axle rotating angle | |
| CN102243081A (en) | Laser angular displacement sensor | |
| CN106411211B (en) | A kind of absolute position signal scaling method of mixed photoelectric encoder | |
| CN205843685U (en) | Rotary encoder for integrated-type industrial machinery sensing control | |
| CN112150898A (en) | Disc multifunctional motion parameter test method | |
| CN105547130A (en) | Method and device for detecting pitch error of ABS ring gear | |
| CN109990823A (en) | For detecting the detection device and detection method of photoelectric encoder precision | |
| CN116067404A (en) | High-precision absolute value magnetic encoder and signal processing method thereof | |
| CN201945599U (en) | Motor speed detection sensor | |
| CN2275242Y (en) | Digit display liquid viscosity meter | |
| CN212054972U (en) | Absolute encoder type water turbine guide vane opening degree measuring device | |
| CN101059332A (en) | Space cam graduation transmission device graduation precision measurer | |
| CN214333827U (en) | Detection system and stopper of code disc | |
| CN2554596Y (en) | Rotation angle sensor | |
| CN210603339U (en) | Rotary encoder reading circuit | |
| CN2194513Y (en) | Augular speed and displacement measurer | |
| CN101620689A (en) | Capacitance-grid remote counter reading device | |
| CN107340024A (en) | Flowmeter high-resolution based on linear magnetic sensor counts conversion equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081105 Termination date: 20161214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |