Alternating current source for exciting inductive transducer

Abstract

The invention relates to an alternating current source for exciting an inductive transducer. The alternating current source comprises a sine wave generator based on an FPGA, the output end of the sine wave generator based on the FPGA outputs two ways of sine wave signals and four ways of pulse signals, the two ways of sine wave signals are input into a wave amplifier, after the sine wave signals are amplified, the sine wave signals are input into a driving circuit, and the driving circuit is used for transmitting excitation signals to the inductive transducer; the four ways of pulse signals output by the sine wave generator are input into a sensor collecting circuit to serve as a reference clock; the sine wave generator based on the FPGA comprises an FPGA chip, the output end of the FPGA chip is connected with DA converters through SPI buses, and the output end of each DA converter is connected with a low-pass filter. According to the alternating current source for exciting the inductive transducer, alternating current signals are used for exciting an inductive transducer coil, the measuring precision of the inductive transducer can be effectively improved, the anti-interference degree of the current exciting signals is improved, and meanwhile the transmission distance is lengthened. The alternating current source can be widely applied to the field of on-line monitoring of lubricating oil liquid of various mechanical devices.

Description

technical field [0001] The invention relates to an alternating current source, in particular to an alternating current source for exciting an inductive sensor used for on-line monitoring of mechanical equipment lubricating oil. Background technique [0002] Lubricating oil is an indispensable part in the operation of many mechanical equipment. During the long-term operation of the machine, the wear and tear of mechanical parts always exists. Wear is the main reason that affects the service life and reliability of mechanical equipment. About 80% of equipment failures are caused by mechanical wear, and the economic loss caused by abrasive wear is the most serious. After long-term operation of mechanical equipment, the fine abrasive particles produced by wear and tear will gradually contaminate the lubricating oil and reduce the lubricating effect. It will cause mechanical failure and even cause accidents. For large or super-large mechanical equipment, many of them are in the...

AI Technical Summary

Problems solved by technology

Since the sensor is installed in the pipeline of mechanical equipment, the transmission cable of the excitation signal is generally relatively long, with a length of 3 to 15 meters. If the voltage signal is used for transmission, it is easy to be subjected to electromagnetic interference during the transmission process, which eventually leads to the excitation coil. The excitation magnetic field changes

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