Multiplex synchronous flat wheel analog signal source system based on virtual instrument
A multi-channel synchronous, analog signal technology, applied in the direction of ultrasonic/sonic/infrasonic wave generation, etc., can solve the problem of no analog flat wheel signal source articles or related reports, achieve easy analysis and calculation, simplify complexity, reduce complexity degree of effect
Inactive Publication Date: 2008-12-17
HARBIN ENG UNIV
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[0003] So far there are no articles or related reports about the analog flat wheel signal source
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[0037] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0038] 1. Hardware part:
[0039] combine figure 1 , the multi-channel synchronous flat wheel analog signal source system based on virtual instruments is mainly composed of a virtual panel module based on Labwindows / CVI, a signal transfer module based on ARM as the control chip, and a plug-and-play signal generation module based on CPLD as the control chip. Partial composition.
[0040] 1) combine image 3 5. The RAM-based signal conversion module adopts the LPCxxxx chip of PHILIPS Company, which is a 32-bit ARM7TDMI-S based on real-time simulation and tracking. TM CPU microcontroller with 256K bytes of embedded high-speed FLASH memory, 128-bit wide interface / accelerator can achieve up to 60MHZ operating frequency.
[0041] 2) combine Figure 6 , The USB interface adopts the CHxxxV interface control chip, adopts the USB2.0 standard bus specification, and the ...
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The invention provides a multiplexing synchronous horizontal wheel simulated signal source system based on a virtual instrument. The simulated signal source system includes a virtual panel module based on Labwindows / CVI, a signal switchover module based on ARM as a control chip and a plug-and-play signal generating module based on CPLD as the control chip. The signal switchover module based on the ARM as the control chip adopts the ARM composed of a power supply, a crystal oscillator, a reset circuit, a JTAG port and a serial port as the control chip and further comprises a USB switching circuit, liquid crystal, a press key, a drive circuit and a plug and play interface functional circuit connected to the signal switchover module at the periphery thereof. The virtual panel based on the Labwindows / CVI is connected with the USB switching circuit of the signal switchover module based on the ARM as the control chip via USB wires. The plug-and-play signal generating module is connected to the plug-and-play interface function circuit of the signal switchover module based on the ARM as the control chip. The system can replace the horizontal wheel simulating signal source of an on-site train to realize the synchronization of the 9-way horizontal wheel signal. The 9-way signal can be replaced simultaneously, and the amplitude value and the frequency of the 9-way signal are tunable.
Description
(1) Technical field [0001] The present invention relates to an analog signal generating device, in particular to recovering and simulating the vibration of a train wheel tread (abbreviated as a flat wheel) with flat scars when it is in contact with the rails according to the sensor data collected on site. Flat wheel analog signal source for signal. (2) Background technology [0002] Flat scars on train wheels and rails are one of the hidden dangers of major train safety accidents. Therefore, the railway department urgently needs to monitor the transport vehicles in real time, and puts forward higher requirements for the safety, efficiency and intelligence of railway testing equipment. No matter what high-performance detection system is based on real-time high-precision acquisition of wheel-rail vibration signals, analysis and processing are performed, and finally the wheel-rail scar damage level is given. Due to the limitations of the actual situation, it is impossible for ...
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Inventor 张兴周胡文飞田金超张博为王鹏飞战永兴李泳萍国强李世亮
Owner HARBIN ENG UNIV