A test method for input and output ports
A technology of input and output ports and test methods, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems that affect the operating efficiency of the system, cannot detect link crosstalk, crosstalk failure, etc., and achieve more stable and long-term safety. running effect
Active Publication Date: 2018-10-19
NANJING SCIYON AUTOMATION GRP
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Problems solved by technology
[0003] There are many testing methods for port input and output links. The input and output links can be effectively detected through detection sequence, output check and redundancy comparison. However, the diagnosis process of these methods cannot be split, and the link cannot be detected. It takes a long time to perform this kind of test for a system with many input and output ports, and some even need to stop the system, which greatly affects the operating efficiency of the system. At the same time, the crosstalk between links fails It is also more likely to occur in a system that mounts multiple input and output devices like this
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[0024] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0025] Such as figure 1 As shown, the test method of the present invention initiates the test by the controller, transmits the test signal to the port to be tested, collects the test signal of the port to be tested and the normal signal of the non-tested port back into the controller, and the controller performs all feedback signals Compare and judge whether the test signal of the port to be tested is normal, and whether the normal signal of the non-tested port is normal. If an error is detected, the system enters abnormal processing. If the detection result is normal, it is judged whether it is necessary to enter the next port test. If necessary, the controller prepares the next port test information.
[0026] Such as figure 2 As shown, it is the main block diagram of the internal structure of the input and output device of the present invention. There is an MCU ...
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The invention discloses a testing method for input / output ports. According to the testing method, a port test of all input / output equipment of an embedded system is divided into single-port tests which are performed in a plurality of times; each port test is performed for aiming at one to-be-tested port; testing information is transmitted to one to-be-tested port of the input / output equipment; testing signal of the to-be-tested port and the normal signal of other non-to-be-tested port of the input / output equipment are acquired; and through performing abnormity determination on the signals which are acquired from the to-be-tested port and the non-to-be-tested port, whether static failure or crosstalk failure of the to-be-tested port occurs is determined. The testing method has advantages of easy application, effective realization of multi-period execution, and no influence on normal system operation.
Description
technical field [0001] The invention belongs to the technical field of input and output port diagnosis, and in particular relates to a method for executing single-port tests multiple times. Background technique [0002] In the field of safety instruments and meters, the input and output of such products are often directly connected to sensors or actuators, and safety instruments and meters are often used in relatively dangerous situations. Very serious casualties and property losses. Therefore, this requires safety instruments and meters to have extremely high safety and reliability, and it is particularly important to test the input and output links. Static faults and channel crosstalk are the main types of failures at the input and output terminals. [0003] There are many testing methods for port input and output links. The input and output links can be effectively detected through detection sequence, output check and redundancy comparison. However, the diagnosis process...
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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 胡歙眉曹雨赵剑峰任秉乾査汀
Owner NANJING SCIYON AUTOMATION GRP