CN113092823A - High-precision wide-range rotating speed generating device - Google Patents
High-precision wide-range rotating speed generating device Download PDFInfo
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- CN113092823A CN113092823A CN202110500163.6A CN202110500163A CN113092823A CN 113092823 A CN113092823 A CN 113092823A CN 202110500163 A CN202110500163 A CN 202110500163A CN 113092823 A CN113092823 A CN 113092823A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
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Abstract
The invention discloses a high-precision wide-range rotating speed generating device. The device includes: the control unit comprises a position sensor, an FPGA module and a microprocessor, wherein the position sensor is in communication connection with the FPGA module, and the FPGA module is in communication connection with the microprocessor; the electromechanical unit comprises a servo motor, an electronic converter, a gear speed increasing mechanism, a low-rotating-speed output shaft and a high-rotating-speed output shaft, wherein the servo motor is electrically connected with the electronic converter, mechanically connected with the gear speed increasing mechanism and in transmission connection with the low-rotating-speed output shaft and the high-rotating-speed output shaft; and an input-output unit. The device realizes the wide-range generation and the accurate control of the standard rotating speed of 0.1-100000 r/min based on a servo motor, a two-stage high-precision gear speed increasing mechanism and an FPGA technology, and can finish the accurate and reliable contact type or non-contact type wide-range rotating speed detection and calibration of a revolution meter, a revolution meter and a revolution sensor.
Description
Technical Field
The invention relates to the technical field of metering test, in particular to a high-precision wide-range rotating speed generating device for detecting a contact type or non-contact type rotating speed measuring instrument and a rotating speed sensor.
Background
The rotating speed is an important parameter for describing the operating technical performance of various rotating machines, and is the basis of mechanical kinematics metering, and the rotating speed of the rotating machines is measured by using a rotating speed measuring instrument or a rotating speed sensor and a secondary instrument, wherein the rotating speed measuring instrument and the rotating speed sensor belonging to working appliances are widely selected by various industries in the society. For example, a tachometer and a tachometer sensor are one of the necessary instruments in the mechanical industry, are used for measuring the rotating speed or frequency of a motor, are commonly used in the manufacturing industries of motors, fans, paper making, plastics, chemical fibers, washing machines, automobiles, airplanes, ships and the like, and relate to various fields of national economy. Various types of tachometers and tachometer sensors must be certified or calibrated by means of a tachometer standard or a tachometer generator.
In the field of measurement and measurement, in order to ensure that the measurement values are uniform or the measurement is accurate and reliable, it is an important work to detect the measurement ranges and measurement errors of a rotating speed measuring instrument and a rotating speed sensor. In China, a brushless motor is often matched with a five-stage gear speed changing device to form a standard rotating speed device by five rotating speed output shafts in the traditional detection of a rotating speed measuring instrument, and the standard rotating speed device covers the rotating speed output range of 5-100000 r/min, as disclosed in a Chinese patent 'standard rotating speed device' (application number: 201420626207.5). The other extended upper limit of the rotating speed measurement is based on a micro motor and an FPGA technology, a standard rotating speed device is formed by a rotating speed output shaft, and the rotating speed output range of 3000-120000 r/min is covered, as disclosed in the Chinese patent 'rotating speed standard device' (application number: 201620473050.6). In addition, a high-speed servo motor is used for connecting the combination configuration of the speed-increasing transmission case and the speed-reducing transmission case, and the rotating speed output range of 0-20000 r/min is covered, as disclosed in the Chinese patent 'rotating speed characteristic calibration device' (application number: 202010208262.2).
With the rapid development of aerospace, national defense military industry, medical health and some high and new technology industries in recent years, the two types of conventional rotating speed standard devices and one type of conventional rotating speed characteristic calibration device cannot meet the wide-range rotating speed metering requirements from national defense construction and civil safety in the aspects of measuring range and measuring precision.
In the prior art, a brushless motor is usually used to cooperate with a gear speed change device, the expansion of an output range is realized through five-stage speed increasing and reducing, the range of the achievable rotating speed is 5-100000 r/min, the range of the achievable rotating speed is 3000-120000 r/min by using a micro motor and an FPGA technology, and the combination configuration of a high-speed servo motor connecting a speed increasing transmission case and a speed reducing transmission case covers the rotating speed output range of 0-20000 r/min, so that the wide-range requirement of the measuring range of 0.1-100000 r/min of a common wide-range rotating speed measuring instrument cannot be met. Moreover, the brushless motor is matched with a five-stage gear speed change device, the structure is complex, the appearance is clumsy, the vibration and the noise are large during the operation, and errors of the five-stage speed change are accumulated: the uncertainty is 1 multiplied by 10 when the rotating speed is 5 to 1000r/min-45X 10 at a rotation speed of 1000 to 100000r/min-5The combination configuration of the high-speed servo motor connecting the speed-increasing transmission box and the speed-reducing transmission box also has error accumulation of multi-stage speed change, and the mechanical abrasion of the micro motor causes the reduction of precision, poor stability and short service life, thus being incapable of meeting the requirement of detecting the 1 multiplied by 10 rotating speed measuring instrument with high precision-5High accuracy requirements.
Disclosure of Invention
The invention aims to provide a high-precision wide-range rotating speed generating device which is used for realizing wide-range generation and precise control of standard rotating speed on the basis of a servo motor, a two-stage large speed increasing ratio high-precision gear speed increasing mechanism and an FPGA (field programmable gate array) technology. The FPGA module is used for controlling the rotating speed in real time, and has high operation precision and strong anti-electromagnetic interference capability. Aiming at the problems of low speed increasing ratio, narrow rotating speed range, large speed fluctuation and large oil splashing lubrication loss of the traditional separately-installed two-stage gear speed increasing mechanism, the invention adopts the integrally-installed and oil-lubricated two-stage high-precision gear speed increasing mechanism, and reduces the gear processing error and the assembly errorDifferential, step-up ratio is 1: 10, smooth running and small speed fluctuation. The invention can complete accurate and reliable contact or non-contact wide-range rotating speed detection and calibration of the revolution meter, the rotating speed measuring instrument and the rotating speed sensor, and the uncertainty of the rotating speed output is better than 1 multiplied by 10-5。
The invention adopts the following solution:
a high accuracy wide range speed generator, the generator comprising:
a power supply unit;
the control unit comprises a position sensor, an FPGA module and a microprocessor, wherein the position sensor is in communication connection with the FPGA module, and the FPGA module is in communication connection with the microprocessor;
the electromechanical unit comprises a servo motor, an electronic converter, a gear speed increasing mechanism, a low-rotating-speed output shaft and a high-rotating-speed output shaft, wherein the servo motor is electrically connected with the electronic converter, is mechanically connected with the gear speed increasing mechanism, and is in transmission connection with the low-rotating-speed output shaft and the high-rotating-speed output shaft;
the servo motor is in communication connection with the position sensor, and the upper limit of the rotating speed of the servo motor can reach 12000 r/min;
the rotating speed range of the rotating speed generating device is 0.1-100000 r/min, and the uncertainty is better than 1 multiplied by 10-5；
The gear speed increasing mechanism adopts a two-stage high-precision gear speed increasing mechanism which is integrally installed and lubricated by grease.
Preferably, in the high-precision wide-range rotating speed generating device, the gear speed increasing mechanism can increase speed in two stages, and the speed increasing ratio is 1: 10.
preferably, in the high-precision wide-range rotating speed generating device, the output rotating speed range of the low-rotating-speed output shaft can be 0.1-10000 r/min.
Preferably, in the high-precision wide-range rotating speed generating device, the output rotating speed range of the high-rotating-speed output shaft can be 10-100000 r/min.
Preferably, in the high-precision wide-range rotating speed generating device, the low-rotating-speed output shaft can drive the standard rotating speed gear plate with 60 teeth to rotate.
Preferably, in the high-precision wide-range rotating speed generating device, the low-rotating-speed output shaft can drive the photoelectric signal reflecting disc to rotate.
Preferably, in the high-precision wide-range rotating speed generating device, the high-rotating-speed output shaft can drive the photoelectric signal reflecting disc to rotate.
Preferably, in the high-precision wide-range rotating speed generating device, the input and output unit may comprise a user interaction interface.
Preferably, in the high-precision wide-range rotating speed generating device, the user interaction interface can be a touch display screen.
Preferably, in the high-precision wide-range rotating speed generating device, the control unit, the power supply unit and the input/output unit may be integrated in the same case.
The invention has the beneficial effects that: the invention adopts a servo motor, a two-stage high-precision gear speed increasing mechanism and an FPGA technology to realize the wide-range generation and the precise control of the standard rotating speed, wherein the two-stage high-precision gear speed increasing mechanism has the characteristics of few stages, high speed increasing ratio, reasonable structure and small accumulated mechanical error in the transmission process, the servo motor feeds back signals through a position sensor, and the position sensor is subjected to feedback control by the FPGA, so that the adjustable and controllable rotating speed setting of a low rotating speed output shaft and a high rotating speed output shaft can be realized, and the high-precision wide-range rotating speed generating device can finish the accurate and reliable rotating speed detection and calibration of a contact type or non-contact type rotating speed measuring instrument and a rotating speed sensor. The invention has the advantages of wide rotating speed range, low lower limit of rotating speed, small running noise and vibration, strong anti-interference capability, flexible and convenient operation and low price.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in greater detail the disclosed exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 is a schematic diagram showing an overall structure of a high-precision wide-range rotational speed generating device according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Fig. 1 shows an overall structure of a high-precision wide-range rotational speed generating device according to an embodiment of the present invention, which is shown in fig. 1, and may include: a control unit 100, a mechatronic unit 200, a power supply unit 300, and an input-output unit 400. The control unit 100 may comprise a position sensor 101, an FPGA module 102 and a microprocessor 103, wherein the position sensor 101 is communicatively connected to the FPGA module 102 and the FPGA module 102 is communicatively connected to the microprocessor 103. The electromechanical unit 200 may include a servo motor 201, an electronic converter 202, a gear increasing mechanism 203, a low rotational speed output shaft 204, and a high rotational speed output shaft 205, wherein the servo motor 201 is electrically connected to the electronic converter 202, mechanically connected to the gear increasing mechanism 203, and drivingly connected to the low rotational speed output shaft 204 and the high rotational speed output shaft 205. The input/output unit 400 is communicatively connected to the microprocessor 103, and is electrically connected to the electronic converter 202 and the power supply unit 300. In the high-precision wide-range rotating speed generating device, a servo motor 201 is in communication connection with a position sensor 101, wherein the servo motor can adopt loose MHMF042L1U2M, the upper limit of the rotating speed reaches 12000r/min, and a corresponding driver is MCDLN35 SC.
The user inputs a set rotational speed through the input/output unit 400, and the input rotational speed is converted into a signal for driving the servo motor 201 by the electronic converter 202. The position sensor 101 measures the rotation speed of the servo motor 201 in real time, and compares the measured rotation speed with the input rotation speed, and controls the rotation speed of the servo motor 201 on the input rotation speed through signal processing of the FPGA module 102 and the microprocessor 103. The high-precision wide-range rotating speed generating device disclosed by the invention realizes wide-range generation and precise control of standard rotating speed based on a servo motor, a two-stage high-precision gear speed increasing mechanism and an FPGA (field programmable gate array) technology, and can finish accurate and reliable contact type or non-contact type wide-range rotating speed detection and calibration on a tachometer, a rotating speed measuring instrument and a rotating speed sensor.
In one example, the gear speed increasing mechanism 203 may be a two-stage speed increasing mechanism with a speed increasing ratio of 1: 10, the two-stage gear speed increasing has high speed increasing ratio, reasonable structure and stable operation characteristic, and can realize reliable rotating speed output.
In one example, the output speed of the low speed output shaft 204 can range from 0.1 to 10000 r/min.
In one example, the output speed of the high speed output shaft 205 may range from 10 to 100000 r/min.
In one example, the low speed output shaft 204 may rotate a 60 tooth standard speed gear plate.
In one example, the low speed output shaft 204 may rotate the optical-electrical signal reflective disk.
In one example, the high speed output shaft 205 may rotate the optical-electrical signal reflective disc
In one example, the input and output unit 400 may include a user interaction interface. The user can input the set rotation speed through the user interaction interface.
In one example, the user interaction interface may be a touch display screen.
In one example, the control unit 100, the power supply unit 300, and the input-output unit 400 may be integrated in the same chassis.
Application example
To facilitate understanding of the solution of the embodiments of the present invention and the effects thereof, three specific application examples are given below. It will be understood by those skilled in the art that this example is merely for the purpose of facilitating an understanding of the present invention and that any specific details thereof are not intended to limit the invention in any way.
Application example 1: the high-precision wide-range rotating speed generating device is used for detecting the laser rotating speed measuring instrument.
The measuring beam emitted by the laser sensor of the laser type rotating speed measuring instrument is irradiated on the low rotating speed output shaft 204 or the high rotating speed output shaft 205 of the high-precision wide-range rotating speed generating device, and the output rotating speed of the high-precision wide-range rotating speed generating device is measured through the photoelectric signal reflecting disc driven by the output shaft of the device. The detection of the measuring range and the measuring error of the rotating speed measuring instrument is completed by setting the output rotating speed according to 1, 3 and 5 series within the rotating speed range of 1-100000 r/min through the touch display screen of the high-precision wide-range rotating speed generating device. The measurement result shows that the uncertainty of the laser type rotating speed measuring instrument in the extended measurement within the rotating speed range of 1-100000 r/min is 0.001%.
Application example 2: the high-precision wide-range rotating speed generating device provided by the invention is used for detecting the photoelectric digital rotating speed meter.
The measuring light beam emitted by the photoelectric sensor of the photoelectric digital tachometer irradiates on the low rotating speed output shaft 204 or the high rotating speed output shaft 205 of the high-precision wide-range rotating speed generating device, and the output rotating speed of the high-precision wide-range rotating speed generating device is measured through a photoelectric signal reflecting disc driven on the output shaft of the device. The detection of the measuring range and the measuring error of the photoelectric digital tachometer is completed by setting the output rotating speed according to the series of 1, 3 and 5 within the rotating speed range of 1-99999 r/min through the touch display screen of the high-precision wide-range rotating speed generating device. The measurement result shows that the maximum allowable error of the photoelectric digital tachometer in the rotating speed range of 1-99999 r/min is 0.05%.
Application example 3: the magnetoelectric rotating speed sensor is detected by the high-precision wide-range rotating speed generating device.
The magnetoelectric rotating speed sensor is close to a 60-tooth standard rotating speed gear disc driven by a low rotating speed output shaft 204 of the high-precision wide-range rotating speed generating device, the gap between the front end surface of the sensor and the tooth top is (0.5-1.5) mm, and the front end surface of the sensor is perpendicular to and intersected with the axis of a gear shaft, so that the output rotating speed of the high-precision wide-range rotating speed generating device is measured. The detection of the measurement error of the magnetoelectric rotation speed sensor is completed by setting the output rotation speed according to 300 r/min, 500 r/min, 1000r/min, 3000 r/min, 5000 r/min and 7000 r/min through the touch display screen of the high-precision wide-range rotation speed generating device. The measurement result shows that the measurement error of the magnetoelectric rotating speed sensor in the rotating speed range of 300-7000 r/min is +/-1 r/min.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. High accuracy wide range rotational speed generating device, its characterized in that includes:
a power supply unit;
the control unit comprises a position sensor, an FPGA module and a microprocessor, wherein the position sensor is in communication connection with the FPGA module, and the FPGA module is in communication connection with the microprocessor;
the electromechanical unit comprises a servo motor, an electronic converter, a gear speed increasing mechanism, a low-rotating-speed output shaft and a high-rotating-speed output shaft, wherein the servo motor is electrically connected with the electronic converter, is mechanically connected with the gear speed increasing mechanism and is in transmission connection with the low-rotating-speed output shaft and the high-rotating-speed output shaft; and
an input/output unit in communication connection with the microprocessor and electrically connected with the electronic converter and the power supply unit,
the servo motor is in communication connection with the position sensor, and the upper limit of the rotating speed of the servo motor can reach 12000 r/min;
the rotating speed range of the rotating speed generating device is 0.1-100000 r/min, and the uncertainty is better than 1 multiplied by 10-5；
The gear speed increasing mechanism adopts a two-stage high-precision gear speed increasing mechanism which is integrally installed and lubricated by grease.
2. The high-precision wide-range rotating speed generating device according to claim 1, wherein the gear speed increasing mechanism is a two-stage speed increasing mechanism, and the speed increasing ratio of the gear speed increasing mechanism is 1: 10.
3. the high-precision wide-range rotating speed generating device according to claim 2, wherein the output rotating speed range of the low-speed output shaft is 0.1-10000 r/min.
4. The high-precision wide-range rotating speed generating device according to claim 2, wherein the output rotating speed range of the high-speed output shaft is 10-100000 r/min.
5. The high-precision wide-range rotating speed generating device according to claim 1, wherein the low-speed output shaft can drive a 60-tooth standard-speed gear plate to rotate.
6. The high-precision wide-range rotating speed generating device according to claim 1, wherein the low-speed output shaft can drive the photoelectric signal reflecting disc to rotate.
7. The high-precision wide-range rotating speed generating device according to claim 1, wherein the high-speed output shaft can drive the photoelectric signal reflecting disc to rotate.
8. The high-precision wide-range rotating speed generating device according to claim 1, wherein the input/output unit comprises a user interface.
9. The high-precision wide-range rotating speed generating device according to claim 8, wherein the user interaction interface is a touch display screen.
10. The high-precision wide-range rotating speed generating device according to claim 1, wherein the control unit, the power supply unit and the input/output unit are integrated in the same case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110500163.6A CN113092823A (en) | 2021-05-08 | 2021-05-08 | High-precision wide-range rotating speed generating device |
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| CN202110500163.6A CN113092823A (en) | 2021-05-08 | 2021-05-08 | High-precision wide-range rotating speed generating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236179A (en) * | 2021-12-21 | 2022-03-25 | 江苏丰仪同创互联科技有限公司 | Tachometer calibrating device based on image recognition technology and automatic calibrating method |
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2021
- 2021-05-08 CN CN202110500163.6A patent/CN113092823A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236179A (en) * | 2021-12-21 | 2022-03-25 | 江苏丰仪同创互联科技有限公司 | Tachometer calibrating device based on image recognition technology and automatic calibrating method |
| CN114236179B (en) * | 2021-12-21 | 2023-12-01 | 江苏丰仪同创互联科技有限公司 | Tachometer verification device and automatic verification method based on image recognition technology |
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