Platinum resistance and analogous current transducing circuit
A technology for simulating current and transmission circuits, applied in the field of transmitters, can solve problems such as inconvenient use, no modularization, and low cost performance, and achieve the effects of low cost, high precision, and small size
Inactive Publication Date: 2013-01-16
HANGZHOU DIANZI UNIV
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Problems solved by technology
Although the number of measurement channels of many current analog transmitters can be selected according to application requirements, they generally do not use modularization. It is difficult for users to integrate analog transmitters into their own circuits or chassis, and they can only use an external chassis. It is not very convenient to use, and it is expensive and cost-effective
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[0022] The present invention will be further described below in conjunction with accompanying drawing.
[0023] Such as figure 1 As shown, the present invention mainly consists of a platinum resistance measuring circuit 1, an analog current measuring circuit 2, a measurement channel selection circuit 3, a voltage-current conversion circuit 4, a voltage value output interface 6, a current value output interface 5, a measurement channel selection interface 7 and multiple The power supply interface is composed of 8. The analog current measurement circuit, the platinum resistance measurement circuit, the measurement channel selection circuit, and the voltage-current conversion circuit are the core parts of the present invention, and the voltage value output interface, the current value output interface, the measurement channel selection interface and the multi-power supply interface are peripheral interface parts, It is mainly composed of some connectors.
[0024] Such as figu...
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The invention relates to a platinum resistance and analogous current transducing circuit, and the present analog quantity transducer has simplex function. The circuit mainly includes a platinum resistance measuring circuit, an analogous current measuring circuit, a measuring channel selection circuit, a voltage and current converting circuit, a voltage value output interface, a current value output interface, a measuring channel selection interface and a multi-power-supply supply interface, wherein the analogous current measuring circuit, the platinum resistance measuring circuit, the measuring channel selection circuit and the voltage and current converting circuit are the core of the circuit; and the voltage value output interface, the current value output interface, the measuring channel selection interface and the multi-power-supply supply interface are peripheral interfaces, and are mainly formed by socket connectors. The platinum resistance and an analogous current transducing circuit integrates the platinum resistance temperature measurement capability and the 4-20 mA analogous current measuring capability, is available for measuring channel selection, and has the characteristics of high precision, small size, modularization, low cost, high stability and the like.
Description
technical field [0001] The invention relates to a transmitter equipped with an analog sensor in the field of industrial production, in particular to a transmitter circuit capable of measuring platinum resistance temperature and 4-20mA analog current and capable of selecting measurement channels. Background technique [0002] "Instrument automation" in the industrial production process is the trend of industrial development today. Detection is an important link in the production process, and it is the basis for automatic adjustment and control. Only when the detected information is accurate and reliable, and meets the requirements of industrial production, can it be used as a calculation parameter or a control parameter and then fed back to the industrial production process. In terms of industrial measurement and control, general-purpose analog quantities such as temperature, pressure, flow, and heat are widely transmitted in the form of platinum resistance measurement and 4-...
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IPC IPC(8): G01D5/14
Inventor 蔡文郁张美燕
Owner HANGZHOU DIANZI UNIV