Resistance/capacitance measuring method and device thereof

A resistance-capacitance and measurement method technology, which is applied to measurement devices, measurement of resistance/reactance/impedance, and transmission of sensing components by means of electric/magnetic devices, etc. Model or style, shortened sampling time, wide range of effects

Inactive Publication Date: 2011-11-23
郑军
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0013] The primary purpose of the present invention is to provide a resistance-capacitance measurement method to solve the complex circuit, high cost, poor anti-interference, low precision, or long sampling time and poor real-time performance of the transmitter front-end measurement circuit in th

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  • Resistance/capacitance measuring method and device thereof
  • Resistance/capacitance measuring method and device thereof
  • Resistance/capacitance measuring method and device thereof

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Embodiment Construction

[0032] refer to Figure 2 to Figure 6 , a method for measuring resistance and capacitance, comprising a multi-channel series resistance-capacitance module, a multi-channel series resistance-capacitance selection module, a resistance-capacitance-period conversion module and an N cycle time detection module, and the multi-channel series resistance-capacitance module converts the resistance to be detected Or the capacitor is connected in series with the corresponding determined capacitor or resistor; the multi-channel series resistance-capacitance selection module will select the circuit to be detected in the multi-channel series resistance-capacitance module; the resistance-capacitance-period conversion module converts the resistance-capacitance value of the selected line Generate a continuous pulse corresponding to the resistance-capacitance value and realize power supply or capacitor charge and discharge control for multiple series resistance-capacitance modules; Time is measu...

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Abstract

The invention relates to a resistance/capacitance measuring method and device thereof. The device comprises a multi-path serial resistor-capacitor module, a multi-path serial resistor-capacitor selection module, a resistor/capacitor-period conversion module and an N period time detection module, and is characterized in that: the multi-path serial resistor-capacitor module serially connects a resistor or capacitor to be detected with a corresponding determined capacitor or resistor; the multi-path serial resistor-capacitor selection module selects a line to be detected in the multi-path serial resistor-capacitor module; the resistor/capacitor-period conversion module converts the resistance-capacitance value of the selected line into a continuous pulse with period corresponding to the resistance-capacitance value and realizes power supply or capacitor charge/discharge control on the multi-path serial resistor-capacitor module; and the N period time detection module is used for detecting the time of N periods of the continuous pulse output by the resistor/capacitor-period conversion module. The device provided by the invention has very simple circuit and low cost, is widely applicable, and can shorten the sampling time by 1-2 orders of magnitude relative to a frequency conversion type circuit.

Description

technical field [0001] The invention relates to a resistance-capacitance measuring method and a device thereof, which are applied in the fields of industrial control and instrumentation, especially resistance-type or capacitance-type transmitters for industrial process control. Background technique [0002] Resistive or capacitive transmitters are widely used in the field of industrial process control. In recent years, with the development of microprocessor and single-chip microcomputer (MCU) technology, intelligent transmitters have gradually become the mainstream. In this way, the front-end measurement circuit of the MCU needs to digitize the detection results before the MCU can perform subsequent further processing. [0003] The front-end measurement circuit of the resistance transmitter is the resistance detection and digitization circuit, commonly used single-arm bridge, double-arm bridge and four-arm full bridge, or constant current drive, or resistance bias, etc., out...

Claims

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Application Information

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IPC IPC(8): G01R27/02G01R27/26G01D5/16G01D5/24
Inventor 郑军
Owner 郑军
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