a signal conditioner
A signal conditioner and voltage signal technology, applied in the field of electronics, can solve problems such as inaccurate monitoring signals, achieve high-reliability signal transmission, reduce the possibility of circuit damage, and achieve high compensation accuracy.
Active Publication Date: 2018-03-09
PIPECHINA SOUTH CHINA CO
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Problems solved by technology
[0005] The embodiment of the present invention provides a signal conditioner to solve the technical problem that the signal conditioner in the prior art does not consider the influence of the ambient temperature on the monitoring signal, resulting in inaccurate monitoring signals after processing
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Embodiment Construction
[0051] The embodiment of the present invention provides a signal conditioner to solve the technical problem that the processed monitoring signal is inaccurate due to the lack of consideration of the influence of the ambient temperature on the monitoring signal in the signal conditioner in the prior art.
[0052] An embodiment of the present invention provides a signal conditioner, including:
[0053] The current loop receiving circuit is used to receive the current signal sent by the pressure transmitter and convert the current signal into a voltage signal; the current loop receiving circuit includes:
[0054] Positive input;
[0055] The first operational amplifier has a first positive input pin, a first negative input pin, a first power supply pin, a second power supply pin and a first output pin, the first power supply pin is connected to the positive input terminal, The second power supply pin is grounded through the first resistor;
[0056] The first capacitor, the firs...
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The invention discloses a signal conditioner, comprising: a current loop receiving circuit for receiving a monitoring signal for monitoring whether a pipeline leaks; a temperature compensation unit for determining the signal required under the real-time ambient temperature according to the real-time ambient temperature Amplification gain; a signal amplification circuit, connected to the current loop receiving circuit and the temperature compensation unit, for amplifying the monitoring signal according to the signal amplification gain; a low-pass filter circuit, connected to the signal amplification circuit connected to filter out signals with a frequency higher than a preset frequency in the monitoring signals. It can be seen that since the current loop reception in the signal conditioner of the embodiment of the present invention adopts the photoelectric coupling method, on the basis of receiving and converting the current signal output by the voltage transformer into a voltage signal, the high voltage transformer and signal conditioner are provided. Reliable signal transmission and effective electrical isolation greatly reduce the possibility of mutual interference and circuit damage.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to a signal conditioner. Background technique [0002] The safe operation of oil and gas pipelines is gradually becoming the focus of attention. Leaks caused by corrosion, third-party damage and other reasons seriously threaten the safe operation of pipelines. The pipeline leakage monitoring system is an automatic system for monitoring the leakage of pipeline fluid. The leakage monitoring system needs to collect the pressure of the fluid in the pipeline through the pressure transmitter, and judge whether the pipeline leaks according to the change of the pressure. [0003] In the leakage monitoring system, the output signal of the on-site pressure transmitter is usually doped with a lot of noise, which is not suitable for direct data analysis and processing. It needs to be pre-processed by the signal conditioner before it can be input to the signal acquisition terminal. The per...
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IPC IPC(8): F17D5/06
Inventor 许斌谭东杰王洪超吴家勇王立坤郑健峰富宽张弢甲刘胜楠
Owner PIPECHINA SOUTH CHINA CO