KR20120034946A - Rpm measuring equipments which are had in rotation style torque measuring equipment - Google Patents

Rpm measuring equipments which are had in rotation style torque measuring equipment Download PDF

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Publication number
KR20120034946A
KR20120034946A KR1020100096346A KR20100096346A KR20120034946A KR 20120034946 A KR20120034946 A KR 20120034946A KR 1020100096346 A KR1020100096346 A KR 1020100096346A KR 20100096346 A KR20100096346 A KR 20100096346A KR 20120034946 A KR20120034946 A KR 20120034946A
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South Korea
Prior art keywords
measuring
magnetic
measuring device
detection sensor
rpm
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KR1020100096346A
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Korean (ko)
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전부열
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전부열
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Priority to KR1020100096346A priority Critical patent/KR20120034946A/en
Publication of KR20120034946A publication Critical patent/KR20120034946A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/045—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft by measuring variations of frequency of stressed vibrating elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/14—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft
    • G01L3/1478—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving hinged levers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

PURPOSE: An RPM measuring system equipped in a rotary torque measuring device is provided to increase the accuracy of RPM measurement and minimize the overall volume of a torque measuring device. CONSTITUTION: An RPM measuring system equipped in a rotary torque measuring device comprises an RPM measuring rotary plate installed with a plurality of magnetic chips(31). The RPM measuring rotary plate comprises an A-phase detection sensor(32) and a B-phase detection sensor(33) on both upper sides thereof to sense the magnetic chip. The A-phase detection sensor and the B-phase detection sensor are close to both sides of the magnetic chip and have 90 degree of phase difference. A cellophane coating film(34) is formed on both surfaces of the RPM measuring rotary plate.

Description

RPM measuring equipments which are had in rotation style torque measuring equipment}

The present invention relates to an RPM measuring apparatus provided in a rotary torque measuring device, and more specifically, to miniaturize and slim the structure of the RPM measuring apparatus to minimize the total volume of the torque measuring apparatus and at the same time by using an encoder waveform. Precise RPM can be made.

In general, the rotary torque measuring device is widely used for measuring the rotation torque and angle of measuring equipment, automation equipment, automobiles, home appliances, ships etc. (hereinafter referred to as 'measurement object'). have.

Here, the rotational torque measuring device 1 will be briefly described with reference to the drawings. As shown in FIG. 4, the conventional rotary torque measuring device is connected to a measurement object and has a strain gauge at the tip of the torque measuring input shaft 11 that rotates. 12) and the slip ring 13 to be configured to rotate simultaneously.

Then, the electric transfer brush 14 is formed on the outer circumference of the slip ring 13 so as to be rubbed with the slip ring 13 selectively by the electric magnetic controller 15.

At this time, the electric signal generated by the electric transfer brush 14 is rubbed on the outer circumference of the slip ring 13 is detected by the torque value output sensor 16 and the full signal in the main computer (not shown) Conversion, calculation, and output (torque value) using a circuit are performed.

In addition, the torque measuring device 1 described above simultaneously performs the measurement of the ALPM of the measurement target at the same time as the torque measurement.

That is, the RF measuring rotary plate 2-1 is formed at the tip of the torque measuring input shaft 11 located at one side of the slip ring 13, and then the magnetic field generating device 2-2 is installed to detect the AlMP measuring object. Will be measured,

In this case, as shown in FIG. 5, the RF measurement rotating plate 2-1 repeatedly forms a plurality of gear-shaped convex parts 2-3 and concave parts 2-4 around the outer periphery thereof. -2) has a magnetic field sensor (2-5) that generates a magnetic field at the tip by an electrical action and senses the change in the magnetic field.

Therefore, when the RMP rotating plate 2-1 rotates at the same time as the torque measuring input shaft 11, the range of the magnetic field generated by the magnetic field generating device 2-2 is the outer convex portion 2 of the RPM rotating plate 2-1. -3) and the repetition via the concave part 2-4, and the magnetic field sensing sensor 2-5 detects the changed state and transmits it to the main computer to measure the number of revolutions of the RPM measuring plate per minute. do.

Here, the magnetic field change detection principle of the magnetic field sensor is to detect the change in the magnetic field range when the inflow of the object within the range of the magnetic field generated by the electrical action, compared with the pulse pattern input to the main computer to obtain a value When the outer convex portion and the concave portion of the RMP measuring rotation plate rotate on the magnetic field generating device, the convex portion is close to the magnetic field generating device, and the concave portion does not change out of the upper magnetic field range.

Conventional rotary torque measurement apparatus found through the above brief description is a situation that is currently widely used as a device for measuring the rotational torque and the RPM for the measurement object at the same time, but the volume problem by the RPM measurement device has been pointed out, and furthermore, the ALPM measurement Since the method detects a change in the magnetic field range using the convex portion and the concave portion of the outer periphery of the RPM measuring plate, the accuracy of the RMP is significantly reduced.

To describe this in more detail, the ARPM measuring apparatus provided in the conventional torque measuring apparatus repeatedly forms a plurality of convex portions and concave portions on the outer periphery of the ALPM measuring rotating plate, and places a magnetic field generating device having a magnetic field sensing sensor on one side thereof. It is

At this time, the formation conditions of the convex portion and the concave portion of the RMP measuring rotary plate are such that only one convex portion and one concave portion of the convex portion and the concave portion can be recognized in the magnetic field generation range generated in the magnetic field generating device as shown in FIG. 5. The convex portion and the concave portion are repeatedly formed at regular intervals.

This is to obtain a continuous output waveform (pulse value according to the detection of the magnetic field range change) of the rotating object.

For example, assuming that the convex portion is 1 (when the magnetic field range changes) and the concave part is 2 (when the magnetic field range does not change), the value detected by the rotation is 1,0,1,0,1 It is preferable to measure in order.

Therefore, it is preferable that the convex portion and the concave portion of one of the plurality of convex portions and concave portions are repeatedly detected, which is very difficult to manufacture and form. When the interval is maintained, there is a problem in that the measurement pulse signal is long accordingly, the accuracy of the AlpM measurement is poor, and even if the reverse rotation of the measurement object had a problem that was impossible to detect.

The convex portion and the concave portion formed on the RMP measurement rotating plate and the magnetic field generating device obtained by detecting the output wave form are those that are recognized by those skilled in the art and detailed description thereof will be omitted.

The present invention has been invented to supplement the above conventional problems, in particular in the configuration of the RPM measuring apparatus with a rotary torque measuring device, while making the volume of the RMP measuring rotating plate small and at the same time a plurality of magnetic chips in the outer periphery In order to make the Alp measurement using the encoder waveform to be made, it was invented with the focus of the technical problem to minimize the overall volume of the torque measuring device and at the same time to maximize the precision of the Alp measurement.

Means to be solved in the present invention comprises a strain gage 12 and a slip ring 13 at the tip of the torque measurement input 11 shaft that is connected to the measurement object and rotates as shown in FIG. (13) AlpM measuring device (2) with a rotary torque measuring device (1) configured to provide an electric transfer brush (14) on the outer circumference to be selectively rubbed with the slip ring 13 by the electric magnetic control device (15) In constructing,

The RF measuring device 2 includes an RF measuring rotating plate 3 having a plurality of magnetic chips 31 installed on the outer periphery on one side of the torque measuring input shaft 11 of the rotary torque measuring device 1,

It consists of an A-phase detection sensor 32 and a B-phase detection sensor 33 installed to detect the magnetic chip 31 on both upper sides of the RPM measuring rotary plate (3),

The A-phase detection sensor 32 and the B-phase detection sensor 33 are alternately installed so as to have a 90 ° phase difference while being located close to both sides of the magnetic chip 31.

The RPM rotating plate 3 is characterized in that the plurality of magnetic chips 31 are repeatedly installed at the outer circumference so that the positive and negative electrodes cross each other and the cellophane coating film 34 is formed on both surfaces thereof. do.

Therefore, the present invention, which proposes the above-mentioned means for solving the above problems, is simple and small in size, and is stably installed in a compact slim torque measuring device, as well as A and B having a 90 ° phase difference between two A and B phase sensors. Phase encoder waveform output enables easy control of ALPM measurement without the need for additional circuits in various embedded controllers and PLCs, and more accurate at low speed or high speed with twice the waveform output of conventional gear type (convex, concave). AlPM measurement will have a possible effect.

This will be described below in detail with the accompanying drawings.

1 is an overall illustration of the present invention,
2 is a partial enlarged cross-sectional view of the present invention.
Figure 3 is a partial cross-sectional view of the torque measuring device is installed the present invention,
4 is an exemplary view of a torque measuring device;
5 is an exemplary view of a conventional RF measuring device.

Prior to describing the present invention in detail, the description of the known rotational torque measuring device 1 is briefly described since it may blur the gist of the present invention.

As shown in FIG. 4, the present invention constitutes a strain gauge 12 and a slip ring 13 at the tip of a torque measuring input shaft 11 that is connected to a measurement object and rotates, and is provided at the outer circumference of the slip ring 13. In the configuration of the RF measuring device 2 in the rotary torque measuring device 1 provided with the transmission brush 14 to be selectively rubbed with the slip ring 13 by the electric magnetic control device 15,

The RMP measuring apparatus 2 includes an RMP measuring rotating plate 3 having a plurality of magnetic chips 31 installed on the outer periphery of one side of the torque measuring input shaft 11 of the torque measuring apparatus 1 with a predetermined interval therebetween;

It consists of an A-phase detection sensor 32 and a B-phase detection sensor 33 for detecting the magnetic chip 31 on both sides of the RMP measurement rotating plate (3).

Here, the A-phase detection sensor 32 and the B-phase detection sensor 33 are alternately installed to have a 90 ° phase difference at the same time as the proximity position on both sides of the magnetic chip 31 as shown in FIG.

At this time, the A, B phase detection sensor 32, 33 is installed in the proximity position within the range of the magnetic field generated by the magnetic chip 31, and also detects the magnetic field of the magnetic chip 31 and the main computer (Fig. US city).

The RF measuring rotating plate 3 forms a plurality of holes 31 ′ at predetermined intervals at the outer circumference thereof, and then installs the magnetic chip 31 therebetween so that the positive electrode and the negative electrode cross repeatedly. The cellophane coating film 34 is formed on both surfaces.

Here, RPM measuring plate is made of non-ferrous metal and at the same time Ø35 ~ Ø90 circle of 1mm in thickness, and the output waveform is 30 ~ 120 pulses with a built-in magnetic chip. By installing a sensor, A phase is outputted first in the forward rotation, B phase is outputted first in the reverse rotation, and the direction of rotation can be detected. Power is supplied from 12V to 24V and a small regulator is used to output waveforms of 3.3V, 5V, and 12V levels. .

Therefore, the present invention to be made in the above configuration is to be used in the measurement of torque at the same time the torque measurement for the measurement object in the torque measuring device,

When the RMP rotating plate rotates simultaneously with the torque measuring input shaft, the A and B phase sensor detects the magnetic field generated from the magnetic chips of the outer periphery and compares it with the waveform input to the main computer to output the RPM of the object. .

That is, as shown in FIG. 2, the plurality of magnetic chips are repeatedly installed at the outer circumference of the ALPM rotating plate to cross the positive and negative poles, and then, A and B phase detection sensors are attached to each side by 90 ° phase difference to rotate the RPM rotating plate. In this case, the A and B phase sensors repeatedly detect the different magnetic fields of the positive and negative poles of the multiple magnetic chips.

Here, the A and B phase sensor repeatedly detects the positive and negative magnetic fields of the magnetic chip and outputs the pulse signal to the main computer, and the main computer compares it with a pre-input positive pulse pattern and analyzes it. Outputs the RF of the measurement object.

The measurement method refers to a conventional encoder waveform measurement method as shown in the following 90 ° phase difference pulse graph, as shown in Figure 2 by providing a detection sensor on the A, B phase on both sides of the RF measurement rotating plate with a 90 ° phase difference Multiple rotating magnetic chips cause the A phase pulse to be 90 degrees ahead of the B phase. In this case, if it is forward rotation and the phase B pulse precedes the phase A pulse, it is reverse rotation.

Figure pat00001

As described in the above description, the present invention uses the A and B phase detection sensors that have 90 ° phase difference at the same time as installing a plurality of small magnetic chips as the RF measuring rotary plate, which is twice as large as the A and B phase waveform output. The waveform output enables more accurate ALPM measurements at low or high speeds.

In the above description, the technical idea of the ALPM measuring apparatus provided in the rotary torque measuring apparatus of the present invention has been described together with the accompanying drawings. However, the present invention exemplarily illustrates the best embodiment, but does not limit the present invention.

Therefore, it is apparent that various modifications and implications such as dimensions, shapes, structures, and the like can be made without departing from the scope of the technical idea of the present invention.

1: Torque measuring device 11: Torque measuring input shaft
12: strain gauge 13: slip ring
14: electric transfer brush 15: electric magnetic control device
16: torque value output sensor 2: RPM measuring device
2-1: RF measuring rotating plate 2-2: magnetic field generating device
2-3: convex portion 2-4: concave portion
2-5: Magnetic field sensor 3: RPM measuring plate
31: Magnetic Chip 31 ': Hole
32: A phase sensor 33: B phase sensor
34 cellophane coating film

Claims (1)

The strain gauge 12 and the slip ring 13 are formed at the tip of the torque measurement input 11 shaft which is connected to the measurement object and rotates, and at the same time, an electric transfer brush 14 is provided on the outer circumference of the slip ring 13 to provide an electric magnetic. In constructing the RMP measuring device 2 with the rotary torque measuring device 1 which is selectively rubbed with the slip ring 13 by the control device 15,
The RF measuring device 2 constitutes an RF measuring rotating plate 3 on which a plurality of magnetic chips 31 are installed at regular intervals on the outer circumference of the torque measuring input shaft 11 of the rotary torque measuring device 1. and,
A phase detection sensor 32 and B phase detection sensor 33 for detecting the magnetic chip 31 are configured on both sides of the RMP measuring rotary plate 3, respectively.
The A-phase detection sensor 32 and the B-phase detection sensor 33 are alternately installed so as to have a 90 ° phase difference at the same time while being located close to both sides of the magnetic chip 31,
The RF measuring rotating plate 3 is formed by repeatedly installing the plurality of magnetic chips 31 so that the positive electrode and the negative electrode cross each other at regular intervals at the outer circumference thereof, and forming a cellophane coating film 34 on both surfaces thereof. ALPM measuring apparatus provided in the rotational torque measuring device characterized in that.
KR1020100096346A 2010-10-04 2010-10-04 Rpm measuring equipments which are had in rotation style torque measuring equipment KR20120034946A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100096346A KR20120034946A (en) 2010-10-04 2010-10-04 Rpm measuring equipments which are had in rotation style torque measuring equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100096346A KR20120034946A (en) 2010-10-04 2010-10-04 Rpm measuring equipments which are had in rotation style torque measuring equipment

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KR20120034946A true KR20120034946A (en) 2012-04-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190060529A (en) * 2017-11-24 2019-06-03 한국기계연구원 Apparatus for measuring torque and rpm

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190060529A (en) * 2017-11-24 2019-06-03 한국기계연구원 Apparatus for measuring torque and rpm

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