CN208847829U - A kind of device and altimeter and slide calliper rule based on rotating excitation field displacement measurement - Google Patents
A kind of device and altimeter and slide calliper rule based on rotating excitation field displacement measurement Download PDFInfo
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- CN208847829U CN208847829U CN201821298179.3U CN201821298179U CN208847829U CN 208847829 U CN208847829 U CN 208847829U CN 201821298179 U CN201821298179 U CN 201821298179U CN 208847829 U CN208847829 U CN 208847829U
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Abstract
The utility model discloses a kind of device based on rotating excitation field displacement measurement and altimeters and slide calliper rule, comprising: rack gear, gear, magnet, processor, at least two magneto sensors and angle detection unit；Wheel and rack engagement, gear drive mag-net synchronous rotation；Magneto sensor monitors magnet poles variation, and exports the signal of the number of characterization pole change；Angle detection unit is used to monitor the absolute angle of magnet poles variation, and exports the signal of the absolute angle of characterization pole change；Processor calculates displacement of the gear on rack gear according to the signal of the number of pole change, the signal of the absolute angle of pole change and gear compound graduation circumference.Compared with prior art, electronic measuring instrument is set to be not easily susceptible to measure the influence of pollutant (Ru Shui, oil, dust etc.) in environment using this method, simultaneously, compared with using the electronic measuring instrument of capacitor, inductance measurement method, its fast response time, measurement stability is more preferable, and measurement accuracy is higher.
Description
Technical field
The utility model relates to electronic measuring instrument fields, and in particular to a kind of device based on rotating excitation field displacement measurement
And altimeter and slide calliper rule.
Background technique
Existing electronic measuring instrument is generally measured using the method for capacitor, inductance, and measurement accuracy is vulnerable to survey
The pollutant effects such as oil, water, dust in environment are measured, and in the use environment of electronic measuring instrument, these pollutants are again difficult
To avoid presence, this leverage using capacitor, inductance measurement method electronic measuring instrument measurement stability.
Utility model content
The purpose of the utility model is to overcome the above-mentioned deficiencies in the presence of the prior art, provide a kind of based on rotary magnetic
The device and altimeter and slide calliper rule of field displacement measurement.
In order to realize above-mentioned purpose of utility model, the utility model provides following technical scheme:
A kind of device based on rotating excitation field displacement measurement characterized by comprising rack gear, gear, magnet, processor,
At least two magneto sensors and angle detection unit；Wherein, the gear is engaged with the rack gear, and the gear drives the magnetic
Body rotates synchronously；The magneto sensor is used to monitor the number of the magnet poles variation, and exports time of characterization pole change
Several signals；The angle detection unit is used to monitor the absolute angle of the magnet poles variation, and exports characterization magnetic pole and become
The signal of the absolute angle of change；The processor is connect with each magneto sensor and the angle detection unit respectively, and
According to characterization pole change number signal, characterize pole change absolute angle signal and gear compound graduation circumference,
Calculate displacement of the gear on the rack gear.
Preferably, the magneto sensor is Hall element, when the Hall element monitors the pole change of the magnet,
The Hall element output pulse signal, and by the pulse signal transmission to the processor；The processor passes through to pulse
Number of signals counts, and obtains the number of full circle of the magnet rotation.
Preferably, at least two Hall elements are separately positioned on position different around the magnet；The processing
Device passes through the phase difference for judging that Hall element described in any two generates pulse signal, determines the direction of the magnet rotation, if
To rotate forward, the pulse signal quantity that the processor is exported according to the Hall element carries out plus coujnt；If reversed
Rotation, the pulse signal quantity that the processor is exported according to the Hall element carry out subtraction count.
Preferably, the work of the magnetic coder is arranged by the processor for magnetic coder in the angle detection unit
Working frequency.
It preferably, further include magnetic screen shell, the magnet is placed in the magnetic screen shell；The processor, the angle
It spends detection unit and at least two magneto sensors to integrate on a circuit board jointly, and circuit board is in the magnetic screen shell
In installation site, magnet described in the magnetic coder face that it is set above.
It preferably, further include shaft, the shaft is fixedly connected by bearing support, one end with the gear；It is described
The shaft other end is fixedly connected with the magnet, and is protruded into inside the magnetic screen shell.
Preferably, the bearing includes first bearing and second bearing, and the first bearing and second bearing are installed respectively
On the support frame, the second bearing is set between the gear and the magnet.
Preferably, support frame as described above is connect with the magnetic screen shell；Or support frame as described above is the one of the magnetic screen shell
Part.
Preferably, a kind of altimeter, including a kind of above-described device based on rotating excitation field displacement measurement.
Preferably, a kind of slide calliper rule, including a kind of above-described device based on rotating excitation field displacement measurement.
Compared with prior art, the utility model has the beneficial effects that the utility model is based on rotating excitation field position using a kind of
The device and altimeter and slide calliper rule of shift measurement, comprising: rack gear, gear, magnet, processor, at least two magneto sensors and angle
Spend detection unit；Wherein, wheel and rack engages, and gear drives mag-net synchronous rotation；Magneto sensor is for monitoring magnet poles
The number of variation, and export the signal of the number of characterization pole change；Angle detection unit is used to monitor magnet poles variation
Absolute angle, and export the signal of the absolute angle of characterization pole change；Processor is examined with each magneto sensor and angle respectively
Unit connection is surveyed, and according to the signal of the number of characterization pole change, the signal and tooth of the absolute angle for characterizing pole change
Wheel indexing circumference, calculates displacement of the gear on rack gear.Compared with prior art, make electronic surveying using this method
Instrument is not easily susceptible to the influence of pollutant (Ru Shui, oil, dust etc.) in measurement environment, meanwhile, with use capacitor, inductance measurement side
The electronic measuring instrument of method is compared, fast response time, and measurement stability is more preferable, and measurement accuracy is higher.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of device based on rotating excitation field displacement measurement；
Fig. 2 is that magnet is directly embedded in the schematic diagram on gear；
Fig. 3 is the positional diagram of Hall element and magnet；
The schematic diagram of pulse is generated when Fig. 4 rotates clockwise for magnet；
Fig. 5 is the schematic diagram that pulse is generated when magnet rotates counterclockwise；
Fig. 6 is the positional diagram of Hall element, magnetic coder and magnet；
Fig. 7 is the structural schematic diagram of the device based on rotating excitation field displacement measurement with magnetic screen shell.
Wherein, 1- rack gear, 2- gear, 3- magnet, 4- processor, 5- magneto sensor, 6- angle detection unit, 7- magnetic screen
Shell, 8- shaft, 9- circuit board, 10- first bearing, 11- second bearing.
Specific embodiment
The utility model is described in further detail below with reference to test example and specific embodiment.But it should not be by this
The range for being interpreted as the above-mentioned theme of the utility model is only limitted to embodiment below, all to be realized based on the content of the present invention
Technology belongs to the scope of the utility model.
Embodiment 1
The utility model, based on the device of rotating excitation field displacement measurement, as shown in Figure 1, comprising: rack gear 1, gear 2, magnet
3, processor 4, at least two magneto sensors 5 and angle detection unit 6.
Wherein, gear 2 is engaged with rack gear 1, and gear 2 drives magnet 3 to rotate synchronously.Magneto sensor 5 is for monitoring magnet magnetic
Pole variation, and export the signal of the number of characterization pole change；Angle detection unit 6 is used to monitor the absolute of magnet poles variation
Angle, and export the signal of the absolute angle of characterization pole change.Processor point 4 is not detected with each magneto sensor 5 and angle
Unit 6 connects, and according to the signal of the number of characterization pole change, the signal and gear of the absolute angle for characterizing pole change
Circumference is indexed, displacement of the gear 2 on rack gear 1 is calculated.
It includes following two that gear, which is fixedly connected with mode with magnet:
The first connection type be it is coaxially connected, magnet is round magnet steel, monitors magnet poles variation convenient for magneto sensor 5
Number, and export characterization pole change number signal, convenient for angle detection unit 6 monitor magnet poles variation it is absolute
Angle, and export the signal of the absolute angle of characterization pole change.
Second of connection type is directly to be embedded in magnet on gear, as shown in Fig. 2, rotation of the magnet 3 with gear 2
Angle changes.
In specific implementation process, magneto sensor 5 is Hall element, as shown in figure 3, Hall element 1 and Hall element 2 are distinguished
It is arranged in around magnet, and Hall element 1 is different with the placement location of Hall element 2, and the rotation side of magnet is judged with this
To.Processor 4, which passes through, judges that Hall element 1 and Hall element 2 generate the phase difference of pulse signal, determines the side of magnet rotation
To if rotating forward, the pulse signal quantity that processor 4 is exported according to Hall element 1 and Hall element 2 carries out addition meter
Number；If rotating backward, the pulse signal quantity that processor 4 is exported according to Hall element 1 and Hall element 2 carries out subtraction meter
Number.
For example, output level transits to high level by low level as shown in figure 4, Hall element 1 detects the pole S, one is generated
A rising edge of a pulse generates waveform diagram A, and Hall element 2 detects the pole S for the first time and equally exports a pulse and rises after θ
Edge generates waveform diagram B, and Hall element 1 exports the advanced Hall element 2 of impulse phase and exports pulse θ, and processor 4 detects at this time
Rising edge moment is exported in Hall element 1, the output of Hall element 2 is low level, judges that magnet steel rotates clockwise, in processor 4
Count is incremented.If magnet steel rotates counterclockwise, as shown in figure 5, Hall element 1, which exports impulse phase, falls behind the output arteries and veins of Hall element 2
Rush θ.Rising edge moment then is exported in Hall element 1, Hall element output is high level, and the counter in processor 4 subtracts 1.
It is similar to above, the failing edge of pulse, the rising edge of Hall element 2, Hall element 2 are exported by Hall element 1
Any one edge of a pulse in failing edge, can complete discriminating direction and magnet steel turnning circle counts.In conclusion processor
The value of counter reflects magnet steel turnning circle in 4, and count value is that positive number expression rotates clockwise, and negative number representation is rotation counterclockwise
Turn.
Wherein, each Hall element is connect with processor 4, and when magnet 3 is by Hall element, Hall element exports pulse
Signal, and by the pulse signal transmission to processor 4, counting of the processor 4 to pulse signal obtains the whole circle of magnet rotation
Number.
In specific implementation process, angle detection unit 6 is magnetic coder, magnetic coder and Hall element 1, Hall element 2
And the positional relationship of magnet, as shown in fig. 6, magnetic coder is right against magnet 3, magnetic coder is able to detect the two poles of the earth in rotary shaft
Absolute angular position when magnet is rotated around the center IC.Absolute angular position can be defeated with different modes such as PWM, ABI, UVW
Out, or by interface it directly reads.Magnetic coder measures the surplus of non-number of full circle.Magnetic is arranged by processor 4 to encode
Detection number of the device within the unit time, as detected 3 times in 1s, with this energy saving.
Then, processor 4 is according to the signal of the number of characterization pole change, the signal of the absolute angle of characterization pole change
And gear compound graduation circumference, calculate displacement of the gear 2 on rack gear 1.
If providing a length of C of gear compound graduation circumference, the counts of processor are K, and magnetic coder detects the angle of surplus
Length for θ, object being measured is L, can use following formula and is calculated:
As shown in fig. 7, the device based on rotating excitation field displacement measurement further includes magnetic screen shell 7, magnet 3 is placed in magnetic screen
In shell 7；Processor 4, angle detection unit 6 and at least two magneto sensors 5 are integrated in jointly on a circuit board 9, and circuit
Installation site of the plate 9 in magnetic screen shell 7 makes the 6 face magnet 3 of angle detection unit being arranged thereon.
When gear 2 and 3 connection type of magnet are coaxially connected, the device based on rotating excitation field displacement measurement includes shaft
8, shaft 8 is by bearing support, and one end is fixedly connected with gear 2, and the other end is fixedly connected with magnet 3, and shaft 8 and
One end that magnet 3 connects is set to inside magnetic screen shell 7.
Its middle (center) bearing includes first bearing 10 and second bearing 11, and first bearing 10 and second bearing 11 are separately mounted to prop up
On support, second bearing 11 is set between gear 3 and magnet 4.
The connection type of support frame and magnetic screen shell 7 is the modes such as welding or bolt.Or support frame is magnetic screen shell
A part.
Embodiment 2
Altimeter (also known as altitude meter) is the instrument for measuring point position in space with respect to ground level, is widely used in online
Or batch detection, can measure height, depth, groove width, internal-and external diameter, the hole heart away from, distance of shaft centers, flatness, verticality etc..
On the basis of embodiment 1, a kind of altimeter, including a plummer, one is fixed on plummer with tooth
The bracket of item, a transmission device being set on bracket and measuring device, and one and transmission device and measuring device electricity
The control device of connection, plummer have a loading end, are used to carry optical element to be detected, and bracket is used for fixed conveyor
Device and measuring device, detection device are used to detect the relative motion distance between transmission device and bracket, and control device is used for
It controls transmission device and digital display is carried out to the output of measuring device, altimeter further comprises that an opposite plummer is arranged
Probe converter and load multiple probes thereon, probe is for detecting optical element, probe converter and transmission device
Connection, and can moving therewith to change the relative distance of probe converter and plummer, probe converter can rotate with
Switch multiple probes selectively to detect to the optical element being carried on plummer.
The measuring device includes gear, magnet, processor, at least two magneto sensors and angle detection unit.When measurement,
Measuring device is slided, gear is engaged with the rack gear on bracket, and gear drives mag-net synchronous rotation, and magneto sensor is for monitoring magnet
Pole change, and export the signal of the number of characterization pole change.Angle detection unit is used to monitor the exhausted of magnet poles variation
To angle, and the signal of the absolute angle of characterization pole change is exported, processor is detected with each magneto sensor and angle respectively
Unit connection, and according to the signal of the number of characterization pole change, the signal and gear of the absolute angle for characterizing pole change
Circumference is indexed, displacement of the gear on rack gear is calculated.
Embodiment 3
Slide calliper rule are a kind of measurers for measuring length, internal-and external diameter, depth, have the function of measuring and examine.
On the basis of embodiment 1, a kind of slide calliper rule, including with including ruler frame, the blade with rack gear and measuring device；
The measuring device includes gear, magnet, processor, at least two magneto sensors and angle detection unit.When measurement, measuring device
It is slided along blade, gear is engaged with the rack gear on blade, and gear drives mag-net synchronous rotation, and magneto sensor is for monitoring magnet magnetic
Pole variation, and export the signal of the number of characterization pole change.Angle detection unit is used to monitor the absolute of magnet poles variation
Angle, and the signal of the absolute angle of characterization pole change is exported, processor is single with each magneto sensor and angle detection respectively
Member connection, and according to the signal of the number of characterization pole change, the signal and gear point of the absolute angle for characterizing pole change
Circumference is spent, displacement of the gear on rack gear is calculated.
Claims (10)
1. a kind of device based on rotating excitation field displacement measurement characterized by comprising rack gear, gear, magnet, processor, extremely
Few two magneto sensors and angle detection unit；Wherein, the gear is engaged with the rack gear, and the gear drives the magnet
It rotates synchronously；The magneto sensor exports the signal of the number of characterization pole change for monitoring the magnet poles variation；
The angle detection unit is used to monitor the absolute angle of the magnet poles variation, and exports the absolute angle of characterization pole change
The signal of degree；The processor is connect with each magneto sensor and the angle detection unit respectively, and according to characterization magnetic
The signal of the number of pole variation, characterize pole change absolute angle signal and gear compound graduation circumference, calculate described
Displacement of the gear on the rack gear.
2. a kind of device based on rotating excitation field displacement measurement according to claim 1, which is characterized in that the magnetosensitive member
Part is Hall element, when the Hall element monitors the pole change of the magnet, the Hall element output pulse signal,
And by the pulse signal transmission to the processor；The processor is by obtaining the magnet to pulse number meter number
The number of full circle of rotation.
3. a kind of device based on rotating excitation field displacement measurement according to claim 2, which is characterized in that at least two institutes
It states Hall element and is separately positioned on position different around the magnet；The processor is by judging Hall described in any two
Element generates the phase difference of pulse signal, determines the direction of the magnet rotation, if rotating forward, the processor is according to institute
The pulse signal quantity of Hall element output is stated, plus coujnt is carried out；If rotating backward, the processor is according to the Hall
The pulse signal quantity of element output, carries out subtraction count.
4. a kind of device based on rotating excitation field displacement measurement according to claim 1, which is characterized in that the angle inspection
The working frequency of the magnetic coder is arranged by the processor for magnetic coder in survey unit.
5. a kind of device based on rotating excitation field displacement measurement according to claim 4, which is characterized in that further include magnetic cup
Shell is covered, the magnet is placed in the magnetic screen shell；The processor, the angle detection unit and at least two magnetic
Quick element integrates on a circuit board jointly, and installation site of the circuit board in the magnetic screen shell, it is arranged above
The magnetic coder face described in magnet.
6. a kind of device based on rotating excitation field displacement measurement according to claim 5, which is characterized in that further include turning
Axis, the shaft are fixedly connected by bearing support, one end with the gear；The shaft other end is fixed with the magnet
Connection, and protrude into inside the magnetic screen shell.
7. a kind of device based on rotating excitation field displacement measurement according to claim 6, which is characterized in that the bearing packet
First bearing and second bearing are included, the first bearing and second bearing are separately mounted on support frame, and the second bearing is set
It is placed between the gear and the magnet.
8. a kind of device based on rotating excitation field displacement measurement according to claim 7, which is characterized in that support frame as described above
It is connect with the magnetic screen shell；Or support frame as described above is a part of the magnetic screen shell.
9. a kind of altimeter, which is characterized in that be based on rotating excitation field displacement including one kind described in any one of 1-8 claim and survey
The device of amount.
10. a kind of slide calliper rule, which is characterized in that be based on rotating excitation field displacement including one kind described in any one of 1-8 claim and survey
The device of amount.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821298179.3U CN208847829U (en) | 2018-08-13 | 2018-08-13 | A kind of device and altimeter and slide calliper rule based on rotating excitation field displacement measurement |
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| CN201821298179.3U CN208847829U (en) | 2018-08-13 | 2018-08-13 | A kind of device and altimeter and slide calliper rule based on rotating excitation field displacement measurement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129211A (en) * | 2020-09-10 | 2020-12-25 | 宁波金兴量具有限公司 | Anti-interference ranging method based on variable magnetic field |
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2018
- 2018-08-13 CN CN201821298179.3U patent/CN208847829U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129211A (en) * | 2020-09-10 | 2020-12-25 | 宁波金兴量具有限公司 | Anti-interference ranging method based on variable magnetic field |
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