A frequency signal generation method based on rs485 serial port and a speed system test method

A RS485, frequency signal technology, applied in the direction of linear/angular velocity measurement, velocity/acceleration/shock measurement, measuring devices, etc., can solve the problems of inconvenient portability, high price, large size, etc., to reduce debugging costs and facilitate on-site debugging Effect

Active Publication Date: 2022-03-29
CRRC DALIAN CO LTD
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Problems solved by technology

However, signal generating equipment such as waveform generators are usually bulky, expensive, and not easy to carry. In field applications, an external power supply may be required, which causes a lot of inconvenience to field testing.

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  • A frequency signal generation method based on rs485 serial port and a speed system test method
  • A frequency signal generation method based on rs485 serial port and a speed system test method
  • A frequency signal generation method based on rs485 serial port and a speed system test method

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0029] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are to distinguish two entities with the same name but different parameters or parameters that are not the same, see "first" and "second" It is only for the convenience of expression, and should not be construed as a limitation on the embodiments of the present invention, which will not be described one by one in the subsequent embodiments.

[0030] As for the technical problems in the background technology, it is found through analysis that there are a large number of interface circuits in the system under test, and if the interface circuits can be used to generate analog signals of spec...

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Abstract

A method for generating frequency signals based on an RS485 serial port and a method for testing a rotating speed system, wherein the method for generating frequency signals includes: connecting the DE end and the end of the RS485 chip, and connecting the first output end of the control module; and connecting the DE end of the RS485 chip The DI terminal is connected to the second output terminal of the control module; the potential change of the first output terminal and the second output terminal is controlled by using the preset control program in the control module, thereby controlling the output terminal output of the RS485 chip corresponding frequency signal. The testing method of the rotational speed system includes: using the RS485 interface circuit in the rotational speed system to generate a rotational speed analog signal; testing the rotational speed system through the rotational speed analog signal. The frequency signal generation method proposed by the present invention can generate various forms of frequency signals; the test method of the rotating speed system proposed on this basis can use the RS485 circuit in the existing control system, and does not need an external power supply, which is more convenient. On-site testing work.

Description

technical field [0001] The invention relates to the field of system testing, in particular to a method for generating a frequency signal based on an RS485 serial port and a method for testing a rotational speed system, which are used to facilitate on-site debugging of a system to be tested and save debugging costs. Background technique [0002] In the process of development, debugging and on-site service in the field of automatic control, it is very common and effective to use simulation signals to test the functions of embedded control systems (hereinafter referred to as control systems). Among them, the frequency input signal is a common signal of the control system, which is usually used to detect physical parameters such as rotational speed. Commonly used forms of frequency quantity signals are square wave signals and sine wave signals, which usually need to be generated by a waveform generator or a dedicated simulation instrument. However, signal generating equipment s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/489H03L7/00
CPCG01P3/489H03L7/00
Inventor 管明华姚琦李莹莹王孝峰吴嘉舜杨晓芳代振威
Owner CRRC DALIAN CO LTD
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