Track circuit traction current interference resistance testing device based on virtual instrument

Abstract

The invention discloses a track circuit traction current interference resistance testing device based on a virtual instrument and belongs to the field of traction current interference resistance testing of railway signal devices. The device achieves the purpose of track circuit traction current interference resistance testing. The analog output of a PXI multifunctional capture card of the device is connected with the midpoint of a sending end coupling device and the midpoint of a receiving end coupling device through a power amplifier. A steel rail I current sensor and a steel rail II current sensor are installed at one end of an analog steel rail I and one end of an analog steel rail II. The two ends of the sending end coupling device are connected to the other end of the analog steel rail I and the other end of the analog steel rail II in parallel. The output of the steel rail I current sensor and the output of the steel rail II current sensor are connected with an analog input port of the PXI multifunctional capture card. The two ends of the receiving end coupling device are connected to the steel rail I and the steel rail II in parallel. A track relay contact is connected with a digital input port of the PXI multifunctional capture card. The device can output various superimposed harmonic interferences at the same time, the transient process of the critical interference of a tested device can be precisely captured, no manual intervention is needed every time testing is performed, the testing precision is improved, and the measuring time is shortened.

Description

technical field [0001] The invention belongs to the field of testing railway signal equipment based on virtual instruments and is used for accurate and efficient anti-traction current interference testing of track circuit equipment. Background technique [0002] Railway signal equipment is the equipment that is susceptible to interference in the railway system, especially in the electric traction section, the traction current can easily cause strong interference to the ground and on-board signal equipment. Heavy-duty and high-speed railways have been used on a large scale in China, but incidents of traction interference currents affecting the work of railway signaling equipment have occurred frequently. At present, in the anti-traction current harmonic interference test of track circuit equipment, the combination of independent measuring instruments such as signal generators and signal analyzers is used. The test process has the following shortcomings. 1) The signal generat...

AI Technical Summary

Problems solved by technology

3) The working status of the equipment under test needs to be observed manually, and the long test time can easily cause human eye fatigue, resulting in missed judgments and misjudgments, and the transient process of the critical interference test cannot be captured

4) Relying on manual testing and recording the results one by one, there are many testers, long test time, poor repeatability and synchronization of data processing, and low accuracy of test results

During the test, the problems that arise cannot be quickly analyzed and diagnosed

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