Direct voltage and direct current signal adaptive sampling circuit and method
An adaptive sampling, DC voltage technology, applied in the measurement of current/voltage, measurement of electrical variables, program control, etc., can solve problems such as poor adaptive ability, achieve a high degree of automation, ensure accuracy, and avoid the influence of sampling signals Effect
Inactive Publication Date: 2019-02-22
XUJI GRP +3
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Problems solved by technology
[0003] The purpose of the present invention is to provide a DC voltage and DC current signal self-adaptive sampling circuit and method, which is used to solve the problem in the prior art that the sampling voltage signal and current signal need to manually short-circuit the resistance or replace the circuit board, and the self-adaptive ability is poor. bad question
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[0025] The specific implementation manner of the present invention will be described in detail below with reference to the drawings and specific embodiments.
[0026] The circuit structure diagram of the DC voltage and DC current signal adaptive sampling circuit provided by the present invention is as follows figure 1 As shown, it includes a polarity change switch K2 and a sampling branch. One end of the polarity change switch K2 is used to connect the DC sampling signal, and the other end of the polarity change switch K2 is connected to the sampling branch; a resistance value is set in series in the sampling branch The two ends of the controllable resistor R1 are connected in parallel with a sampling processing circuit; the sampling processing circuit includes a first control terminal for controlling the resistance of the resistor R1 and a second control terminal for controlling the switching of the polarity change switch K2. In addition, an anti-reverse connection diode D1 i...
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The invention relates to a direct voltage and direct current signal adaptive sampling circuit and method. The adaptive sampling circuit comprises a sampling branch used for connecting a direct currentsampling signal. A resistor with a controllable resistance is arranged in series in the sampling branch. The two ends of the sampling branch are connected in parallel with a sampling processing circuit. The sampling processing circuit comprises a first control end used for controlling and changing the resistance of the resistor. Through changing the resistance of the resistor with the controllable resistance, whether the voltage of the two ends of the resistor is changed is detected, if the voltage is changed, a direct current signal is determined, and the resistance of the resistor is adjusted to the resistance suitable for current sampling and the voltage of the two ends of the resistor is sampled. If the voltage is not changed, a direct voltage signal is determined and the voltage of the two ends of the resistor is directly sampled. Human participation is not needed in a whole process. The voltage signal and the current signal can be sampled adaptively. The structure of the whole sampling circuit is simple and an automation degree is high.
Description
technical field [0001] The invention relates to a DC voltage and DC current signal self-adaptive sampling circuit and method, belonging to the technical field of sampling circuits. Background technique [0002] At present, common DC signal sampling circuits can only sample DC voltage signals or DC current signals. Even if voltage signals and current signals can be sampled, it needs to be realized by manually shorting the resistor or replacing the circuit board. The application is not flexible and the adaptability is not strong. Contents of the invention [0003] The purpose of the present invention is to provide a DC voltage and DC current signal self-adaptive sampling circuit and method, which is used to solve the problem in the prior art that the sampling voltage signal and current signal need to manually short-circuit the resistance or replace the circuit board, and the self-adaptive ability is poor. bad question. [0004] In order to solve the above technical problem...
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IPC IPC(8): G01R19/00G05B19/042
CPCG05B19/042G01R19/00
Inventor 王志鹏王振华周俊华王全海贺渊明宋一丁宋海飞陈号
Owner XUJI GRP