Calibration method and calibration system for field test equipment

A test equipment and on-site test technology, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of rough calibration and cannot meet the needs of high-precision test equipment, and achieve the effect of simple calibration method, easy implementation, and improved accuracy

Active Publication Date: 2010-12-15
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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Problems solved by technology

However, the above "zero point" calibration method does not use a standard signal source to calibrate the test equipment, but uses the "zero point" of the ground wire as the calibration standard

Method used

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  • Calibration method and calibration system for field test equipment
  • Calibration method and calibration system for field test equipment
  • Calibration method and calibration system for field test equipment

Examples

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[0049] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] See figure 1 , Showing the connection relationship when the test equipment is working normally. Including calibration equipment (which can be PC 1 with test software installed), testing equipment 2, tested equipment 3, standard USB cable 4, testing cable 5, among which standard USB cable 4 is used between PC 1 and testing equipment 2 To connect, USB cable 4 not only provides working power for test equipment 2, but also transmits commands and data between PC 1 and test equipment 2. PC 1 can be a desktop computer or a portable notebook.

[0051] Since the portable notebook has a battery life of 2-4 hours, it can carry out signal acquisition and measurement for 2-4 hours even when there is no power supply on site, whic...

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PUM

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Abstract

The invention relates to a calibration method for field test equipment. A calibration system comprises checking equipment, test equipment, a wiring converting device and a standard signal source, wherein the checking equipment and the test equipment are connected by a standard universal serial bus (USB); the test equipment and the wiring converting device are connected by a testing wire; and the wiring converting device is connected with the standard signal source. The method comprises the following steps of: collecting a standard sine wave sent by the standard signal source by using the testequipment; detecting the sampling value of N channels of the test equipment by using the checking equipment; obtaining the calibration coefficients of the N channels by dividing a standard voltage bythe sampling value of the N channels; acquiring the collected original data of the N channels when the test equipment works; and obtaining a calibration sampling value by multiplying the original data of the N channels by corresponding calibration coefficients. The invention also relates to the calibration system for the field test equipment. The calibration method and the calibration system can improve the test precision of the field test equipment.

Description

technical field [0001] The invention relates to the field of signal test equipment, in particular to a calibration method and a calibration system for field test equipment. Background technique [0002] The test equipment is a device that calculates the value of the measured signal according to its operating characteristic curve after sampling the received signal such as the voltage or current of the sensor. From the perspective of standardization, test equipment can be roughly divided into standard test equipment and non-standard test equipment. Standard test equipment such as oscilloscopes, etc., while non-standard test equipment is specially developed according to different field applications and different purposes. Test Equipment. [0003] For the signal measurement in the laboratory, it is more suitable to use standard test equipment such as an oscilloscope, but for the measurement of on-site signals, it is generally not suitable to use an oscilloscope. It is necessar...

Claims

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Application Information

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IPC IPC(8): G01R35/00
Inventor 陈明奎谭利红苏理李小文李进进
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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