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Method and circuit for measuring rotating speed of rotary machine

A technology for rotating speed measurement and realization method, which is applied to devices using electric/magnetic methods, etc., can solve the problems of difficult synchronization of counters, poor reliability, and increased system links, etc., to achieve simple and convenient implementation, reduce random error factors, The effect of less external hardware

Pending Publication Date: 2017-05-10
HARBIN UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

The traditional implementation method is to realize the counting by two counters separately, but it is difficult for the two counters to be synchronized. To achieve synchronous counting, a complex synchronous sequential circuit needs to be added, the system links increase, and the reliability deteriorates.

Method used

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  • Method and circuit for measuring rotating speed of rotary machine
  • Method and circuit for measuring rotating speed of rotary machine
  • Method and circuit for measuring rotating speed of rotary machine

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Embodiment Construction

[0017] The implementation method and measurement circuit for rotating machine speed measurement will be described in detail below in conjunction with the accompanying drawings.

[0018] combine figure 1 , the implementation method of rotating machine speed measurement in the present invention is:

[0019] 1. Using STM32F103 as the microprocessor (3), the speed pulse signal (1) obtained by the speed sensor is input to the TIM1_ETR pin of STM32F103 through optocoupler shaping (2);

[0020] 2. In the initial setting (4), set timer 1 (5) of STM32F103 as the main timer for counting speed pulses, and timer 2 (6) as a slave timer for counting high-frequency time base pulses; set timer 1 (5) It is an external signal triggering, counting up, and comparison output working mode, and the external pulse is used as the clock source, and the comparison output is OC1REF; set timer 2 (6) as an automatic reload, gating working mode, and its trigger selection comes from Based on OC1REF of time...

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Abstract

The invention discloses a method and circuit for measuring the rotating speed of a rotary machine, relates to the field of electronic measurement, and solves the synchronous counting of two counters in rotary machine rotating speed measurement. The method comprises the following steps: a rotating speed pulse signal is input into the pin TIM1_ETR of a STM32F103 via an optocoupler; using the STM32F103 as a processor, and setting a timer 1 and a timer 2 in the STM32F103 in a master-slave synchronization counting mode, and achieving cooperative operation of the two timers by means of configuration of a corresponding register so as to achieve synchronous counting; enabling a processing program to calculate the rotating speed and output the rotating speed to a display module; reconfiguring the corresponding register according to a rotating speed calculation result, starting next measurement and continuously repeating the cycle. The method and circuit for measuring the rotating speed of the rotary machine are accurate in rotating speed measurement, stable in measurement data, good in real-time performance and is simple in required peripheral circuit.

Description

technical field [0001] The invention relates to the field of electronic measurement. Background technique [0002] Rotational speed is a common mechanical quantity, which refers to the number of times an object moving in a circle turns around the center of the circle per unit time. For most rotating machinery, the speed is an important parameter. Through the measurement of the speed, the operating status of the equipment can be monitored in real time and the working conditions of the equipment can be analyzed. Therefore, the real-time and accurate measurement of the speed is very important to ensure the safe and stable operation of the equipment. significance. [0003] The variable M / T principle can be used for the measurement of the speed, that is, the counting of the speed pulse and the high-frequency time base pulse is started and stopped at the same time within a specified time, and the speed is calculated from the corresponding count value, and the speed pulse count va...

Claims

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Application Information

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IPC IPC(8): G01P3/44
CPCG01P3/44
Inventor 许景波许晓红殷宪宇崔晓萌刘智良
Owner HARBIN UNIV OF SCI & TECH
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