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Time integrated test system and method

A technology of comprehensive testing and testing system, applied in the field of communication, can solve the problem that there is no unified standard for synchronization technology, and achieve the effect of testing

Active Publication Date: 2010-05-12
CHINA RAILWAY SIGNAL & COMM SHANGHAI ENG BUREAU GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The serial port character string is sent through the RS232 / RS422 / RS485 serial communication port to encode and send the time information in the form of ASCII code or hexadecimal character string. This method is widely used in China, but due to the current There is no unified standard for the technology of synchronizing, and the ASCII code or hexadecimal code it carries contains private protocol information such as control information and status information except time information, so before the present invention, there is no set of capable Test software for testing the ability of serial port output time accuracy of different manufacturers, used to objectively test and analyze the synchronization accuracy of the time synchronization network based on the transmission time of the serial port

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] see figure 1 , figure 2 , the present invention discloses a comprehensive time test system for detecting time deviation of equipment; the system includes a time synchronization module 10 and a serial port time test module 20 .

[0034] 【Time Synchronization Module】

[0035] The time synchronization module 10 is used to obtain the standard time to ensure the time accuracy and stability of the test system itself; it includes a GPS receiving module 11 , an NTP synchronization module 12 , and a time keeping module 13 .

[0036]The GPS receiving module 11 is composed of a GPS receiver and GPS time synchronization software, used to receive GPS signals, extract time information from the received NMEA standard protocol, and synchronize system time.

[0037] NTP synchronization module 12. The NTP synchronization module is composed of NTP client software. It is used to send time request information to the superior time source of the detected device through NTP to obtain the st...

Embodiment 2

[0061] The time comprehensive test system of the present embodiment comprises a time synchronization module and a serial port time test module; the time synchronization module is used to obtain standard time to ensure the time accuracy and stability of the test system itself; the serial port time test module is used to test time The time accuracy of the output port; the serial port time test module includes a data acquisition module and a data analysis module; the data acquisition module is used for real-time collection of ASCII codes or hexadecimal character strings sent by the detected equipment, and is forwarded to the data analysis module Processing: the data analysis module is used to extract the time information according to the protocol of the detected device according to the received ASCII code or hexadecimal string according to the set sampling mode, and calculate the time deviation between the detected device and the test system.

[0062] Described time synchronizatio...

Embodiment 3

[0075]The test platform of the present invention obtains the standard time through GPS or NTP, and maintains the stability of the time through its own constant temperature crystal oscillator, and then extracts time information from the obtained serial port output information of the device under test, and compares it with the platform time, thereby obtaining the communication time under test. The serial port time output accuracy of the device.

[0076] The workflow of the system platform of the present invention is introduced below.

[0077] 【Input item】

[0078] Select serial port: select the serial port number connected with the time device under test. Must be set.

[0079] Serial port setting: set the baud rate, parity bit, data bit and stop bit of the serial port connected to the time device under test. Must be set.

[0080] The number of bytes received each time: set the total number of bytes of the time protocol output by the serial port time device. Must be set.

...

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Abstract

The invention discloses a time integrated test system and a method. The system comprises a time synchronization module and a serial port time test module; the time synchronization module is used for obtaining standard time and ensuring the self time accuracy and stability of the test system; the serial port time test module is used for testing the time accuracy of a time output port; the serial port time test module comprises a data collection module and a data analysis module; the data collection module is used for collecting an ASCII code or a sexadecimal character string which is transmitted by equipment to be detected at real time and retransmitting the ASCII code or the sexadecimal character string to the data analysis module for processing; and the data analysis module is used for receiving the ASCII code or the sexadecimal character string, extracting time information according to different protocols of the equipment to be detected and a set sampling mode and calculating the time bias of the equipment to be detected and the test system. Under a precondition that the stability of the self time is ensured, the invention can regulate the sampling mode according to different coding modes and realize the test of the output time accuracy of the equipment.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a time test system, in particular to a time comprehensive test system; in addition, the present invention also relates to a test method of the time comprehensive test system. Background technique [0002] Time synchronization network has been widely used in aviation, transportation, banking, securities trading, telecommunications and other industries that require high time precision, and with the popularization and deepening of applications, the application field of time synchronization is constantly expanding. For time synchronization The precision requirements are getting higher and higher, and the time precision requirements of some specific systems have reached the millisecond level, so the time precision test for the time synchronization system is also important. [0003] At present, there are two time synchronization methods in the world. One is the time synchronization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04G5/00G04G7/00G04R20/04
Inventor 张文垚钱伟勇施怿栋冯燕媛李士寒
Owner CHINA RAILWAY SIGNAL & COMM SHANGHAI ENG BUREAU GRP