CN213240194U

CN213240194U - High-precision rotating speed wireless test system

Info

Publication number: CN213240194U
Application number: CN202020740145.6U
Authority: CN
Inventors: 刘文俊; 杨军; 吕文硕
Original assignee: Shanghai Zhaoqing Sensor Technology Co ltd
Current assignee: Shanghai Zhaoqing Sensor Technology Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-05-18
Anticipated expiration: 2030-04-30

Abstract

The utility model relates to a high accuracy rotational speed wireless test system, including test module and receiving module, the main function of test module is the test of main shaft rotational speed, the main function of receiving module is the data of receiving test module wireless transmission, then carries out analysis, processing, analysis to the data; the test module comprises a three-axis accelerometer, a three-axis gyroscope, protocol conversion, an MCU, wireless transmission, a clock, a power supply chip and a battery; the receiving module comprises wireless receiving, protocol conversion, an upper computer interface and processing software. The utility model provides a high accuracy rotational speed wireless test system, can long-range wireless, high accuracy test equipment main shaft pivoted rotational speed, through the data curve of real-time observation main shaft rotational speed, monitor the equipment main shaft in real time, need not to increase personnel's cost, test module be wireless mode, install on the main shaft can, until the debugging and the acceptance of accomplishing equipment.

Description

High-precision rotating speed wireless test system

Technical Field

The utility model relates to a wireless reception technical field specifically is a high accuracy rotational speed wireless test system.

Background

Some traditional press mold preparation facilities, including printing mechanical equipment, polyimide film preparation equipment etc. its precision of producing the product depends on the rotational speed stability of main shaft in the equipment, appears beating when the main shaft in the rotation process, reacts to on the product, and the printing breadth can appear overlapping and dislocation, and the fold can appear in the film. The equipment depending on the stability of the rotating speed of the main shaft needs to carry out high-precision test on the rotating speed, an encoder is adopted for testing in a common testing method, but the encoder is suitable for high-rotating-speed test, and has good speed stability and high testing precision during high-speed measurement, and when the rotating speed is too low, for example, the rotating speed of the main shaft in the equipment is less than 200 degrees per second, the encoder cannot provide enough precision. Therefore, the method has the following disadvantages: 1. the encoder is divided into an incremental encoder and an absolute encoder according to application types, the incremental encoder realizes testing by calculating the number of pulses, the testing precision is reduced due to the loss of the pulses in the process and is generally only used for feeding back the speed of the motor, and the absolute encoder judges a numerical value according to the high and low level of each position and is generally only used for measuring the position or displacement; 2. the stability is poor, the encoder can appear the velocity fluctuation range big at low speed in the folk custom, and the stationarity is poor, and along with the improvement of sampling frequency, the low-speed scope that measures can narrow down, the precision that tests the speed with it descends scheduling problem. 3. Machinery, the rotational speed equipment is surveyed to the encoder contact, and the installation needs drive structure, and drive structure installation needs gear, belt, and the installation elasticity all can the problem, and too tightly increases mechanical loss, aggravates the motor load, and too loose can make the transmission skid for the test is inaccurate.

To sum up, it is necessary to provide a new solution to the test of main shaft rotational speed at present, the utility model discloses a triaxial gyroscope, triaxial accelerometer combine together, use the rotational speed test with inertial navigation subassembly to the not enough of scheme existence above the solution realizes full temperature high accuracy, high flexibility, real-time, and realizes wireless rotational speed test.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high accuracy rotational speed wireless test system to solve the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: a high-precision rotating speed wireless test system comprises a test module and a receiving module, wherein the test module mainly has the main function of main shaft rotating speed test, and the receiving module mainly has the function of receiving data wirelessly transmitted by the test module and then analyzing, processing and analyzing the data;

the test module comprises a three-axis accelerometer, a three-axis gyroscope, test protocol conversion, an MCU, wireless transmission, a clock, a power supply chip and a battery;

the receiving module comprises wireless receiving, receiving protocol conversion, an upper computer interface and processing software.

Preferably, the three-axis accelerometer and the three-axis gyroscope are combined into an IMU unit.

Preferably, the triaxial accelerometer is connected with the triaxial gyroscope in parallel, the IMU unit is connected with test protocol conversion through RS422, the test protocol conversion is connected with the MCU, the MCU is connected with the wireless transmitting module through a UART1 serial port, and the MCU is further connected with a clock and a power supply chip respectively.

Preferably, the power supply chip is also connected with a battery.

Preferably, the MCU is a test module processing unit.

Preferably, the wireless receiving and receiving protocol conversion is connected, the technical protocol conversion is connected with an upper computer interface through a USB interface, and the upper computer interface is further connected with processing software for processing data.

Preferably, the data processing flow includes that the upper computer receives serial port data, analyzes the data, inputs local coordinates and the rotation direction of the equipment, calculates the rotation speed component of the earth in the rotation direction of the main shaft, performs earth rotation compensation to obtain the real rotation speed of the film preparation equipment, and processes the real data.

The utility model discloses possess following beneficial effect at least:

1. the utility model provides a high accuracy rotational speed wireless test system, can long-range wireless, high accuracy test equipment main shaft pivoted rotational speed, through the data curve of real-time observation main shaft rotational speed, monitor the equipment main shaft in real time, need not to increase personnel's cost, test module be wireless mode, install on the main shaft can, until the debugging and the acceptance of accomplishing equipment.

2. The utility model discloses use independent triaxial accelerometer and triaxial gyroscope to carry out rotational speed and position test, the accelerometer resolution ratio of at first choosing reaches 1ug, measuring accuracy repeatability 1.7mg, gyroscope rotational speed accuracy repeatability 7/hr, then, adopt triaxial accelerometer and triaxial gyroscope to also compensate the main shaft weight on two other axes, improve measuring accuracy, and at last, during the actual test, earth rotation has been deducted, the influence of temperature to the test result, and then improve measuring accuracy.

3. The utility model discloses use test module and accept the module mode that combines together, acquire in real time, resolve, handle and show the data of test module test, can supply equipment debugging personnel preview debugging result in real time, need not to carry out the material loading test to equipment, reduce equipment debugging cost simultaneously.

4. The utility model discloses a wireless mode, the test module power supply adopts lithium cell power supply, and the single power supply can reach 8H, satisfies a shift and uses, only need with test module and spindle mounting together, guarantee in the test process that relative position between them is unchangeable can, the whole automatic operation of receiving module need not the record personnel.

Drawings

FIG. 1 is a block diagram schematically illustrating the structure of a test module according to the present invention;

fig. 2 is a block diagram schematically illustrating the structure of the receiving module according to the present invention;

FIG. 3 is a schematic flow chart of data processing according to the present invention;

fig. 4 is a schematic structural diagram of an IMU unit according to the present invention.

In the reference symbols: 10. a test module; 11. an IMU unit; 12. testing protocol conversion; 13. MCU; 14. wireless transmission; 15. a clock; 16. a power supply chip; 17. a battery; 20. a receiving module; 21. wireless receiving; 22. receiving protocol conversion; 23. an upper computer interface; 24. processing software; 25. and (4) analyzing software.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

Referring to fig. 1-3, the present invention provides a technical solution: a high-precision rotating speed wireless test system comprises a test module 10 and a receiving module 20. The test module 10 mainly functions to test the spindle rotation speed, and includes a three-axis accelerometer 111, a three-axis gyroscope 112, a test protocol conversion 12, an MCU13, a wireless transmitter 14, a clock 15, a power chip 16, a battery 17, and the like. The receiving module 20 mainly functions to receive data wirelessly transmitted 14 by the testing module 10, and then analyzes, processes, analyzes, etc. the data, including wireless receiving 21, receiving protocol conversion 22, upper computer interface 23, processing software 24, etc.

In the test module 10, the triaxial accelerometer 111 and the triaxial gyroscope 112 are connected in parallel, after the two are unified into a unit module, data is connected with the test protocol conversion 12 through the RS422, the test protocol conversion 12 is connected with the MCU13, the MCU13 reads the output data of the triaxial accelerometer 111 and the triaxial gyroscope 112, the MCU13 analyzes and processes the read data, data output frequency is established according to the final object to be tested, then programming is continued according to the data output rate, the data is transmitted to the wireless transmission 14 module through the UART1 serial port of the MCU13, and the wireless transmission 14 transmits the data in a transparent transmission form. In addition MCU13 is connected with clock 15 and power chip 16, and the time reference of MCU13 communication frequency and data transmission frequency is unified by clock 15 and is provided, and power chip 16 is connecting battery 17 and MCU13, the utility model discloses a wireless communication form, consequently test module 10 need adopt battery 17 power supply mode, and battery 17 passes through power chip 16 with rated voltage and converts the back, gets into MCU13 and each unit, including triaxial accelerometer 111, triaxial gyroscope 112, protocol conversion, MCU13, wireless transmission 14 etc..

The three-axis accelerometer 111 and the three-axis gyroscope 112 are combined to form the IMU unit 11, wherein the three-axis gyroscope 112 tests angular rates of X, Y, Z in three directions with a test accuracy repeatability of 7 °/hr, and the accelerometer tests accelerations of X, Y, Z in three directions with a test accuracy repeatability of 1.7 mg. The test module 10 is installed on a tested main shaft of the equipment and rotates along with the main shaft, because the rotation direction of the main shaft cannot be ensured to be completely coincided with the single-axis direction of the gyroscope during installation, and components are necessarily present on the projection of the other two axes, a three-axis gyroscope 112 is needed for accurate test, trigonometric function calculation is carried out according to the test result of the three-axis gyroscope 112 to synthesize the angular rate of the main shaft, in order to more accurately measure the system jitter of the main shaft at the position, an accelerometer is used for circumferential position calibration, and in order to compensate the fact that the single-axis rotation direction cannot be completely projected on a single axis, the three-axis accelerometer;

in order to better exert the precision of the three-axis accelerometer 111 and the three-axis gyroscope 112, the utility model discloses carry out the temperature compensation of full temperature-60 ℃ to 90 ℃ to both, guarantee that it can both exert its measuring accuracy at the full temperature range to adapt to wider service environment. And simultaneously, the utility model discloses a scheme has still carried out the deduction to the influence that earth rotation produced the top, researches the G sensitivity of acceleration.

The MCU13 is a processing unit of the test module 10, which reads, analyzes and calculates the data output by the triaxial accelerometer 111 and the triaxial gyroscope 112, and outputs the data to the wireless transmission 14 module after passing through a data filtering algorithm;

in the receiving module 20, the wireless receiver 21 is connected with a receiving protocol converter 22, a data protocol is converted and then transmitted to an upper computer through an upper computer interface 23 for data processing, software deducts earth rotation components according to the dimension of a test position, coordinates with the output of an accelerometer to calculate the position corresponding to the current angular velocity to obtain a group of time or circumferential position and angular velocity data, and performs FFT analysis on the data to obtain peak points of several frequencies existing in the system, so that the system problem of the thin film preparation equipment can be known, and the ALLAN analysis of variance can be performed on the data to know the system noise distribution condition.

And (3) data processing, namely receiving serial port data by an upper computer, analyzing the data, inputting local coordinates and the rotation direction of equipment, solving the rotation speed component of the earth in the rotation direction of a main shaft, performing earth rotation compensation to obtain the real rotation speed of the film preparation equipment, and processing the real data.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A high-precision rotating speed wireless test system is characterized by comprising a test module (10) and a receiving module (20), wherein the test module (10) mainly has the main function of main shaft rotating speed test, and the receiving module (20) mainly has the function of receiving data wirelessly transmitted (14) by the test module (10), and then analyzing, processing and analyzing the data;

the test module (10) comprises a three-axis accelerometer (111), a three-axis gyroscope (112), a test protocol conversion unit (12), an MCU (13), a wireless transmitter (14), a clock (15), a power chip (16) and a battery (17); the receiving module (20) comprises a wireless receiving module (21), a receiving protocol conversion module (22), an upper computer interface (23) and processing software (24).

2. The high-precision rotating speed wireless test system according to claim 1, wherein: the tri-axial accelerometer (111) and tri-axial gyroscope (112) are combined into an IMU unit (11).

3. The high-precision rotating speed wireless test system according to claim 2, wherein: triaxial accelerometer (111) is parallelly connected with triaxial gyroscope (112), IMU unit (11) link to each other through RS422 and test protocol conversion (12), test protocol conversion (12) are connected with MCU (13), MCU (13) is connected through UART1 serial ports and wireless transmission (14) module, clock (15) and power chip (16) are still connected respectively to MCU (13).

4. The high-precision rotating speed wireless test system according to claim 1, wherein: the power supply chip (16) is also connected with a battery (17).

5. The high-precision rotating speed wireless test system according to claim 1, wherein: the MCU (13) is a processing unit of the test module (10).

6. The high-precision rotating speed wireless test system according to claim 1, wherein: the wireless receiving device is characterized in that the wireless receiving device (21) is connected with a receiving protocol conversion device (22), the receiving protocol conversion device (22) is connected with an upper computer interface (23) through a USB interface, and the upper computer interface (23) is also connected with processing software (24) for processing data.