One-phase digital current/voltage measuring instrument and measuring method thereof

Abstract

The invention discloses a one-phase digital current / voltage measuring instrument and a measuring method thereof, comprising a power supply connected with all circuits; the measuring instrument is characterized in that: an input circuit is used for collecting input current / voltage numerical value from a microprocessor; a key signal acquisition circuit is used for setting communication band rate and communication address by a toggle switch; a communication interface circuit is used for adopting RS-485 communication mode based on Modbus protocol to receive command data from an upper computer and uploading the collected input current / voltage data to the upper computer by the microprocessor and keeping real-time communication with the upper computer. By adopting the structure and method, the current and the voltage in an electrical circuit are measured and displayed in a real-time manner, and the measured electric quantity data is transmitted remotely by an RS-485 interface. A user can combine the functional modules randomly according to needs, so as to solve the disadvantage that the information can be obtained only by checking the instrument and improve the precision of the measured numerical value; the product performance is stable and reliable, therefore, the instrument is easy to manufacture.

Description

technical field [0001] The invention relates to a power measuring instrument, in particular to a single-phase digital current / voltage measuring instrument and a measuring method thereof. Background technique [0002] With the increasingly higher requirements for the automation and intelligence of electrical equipment control, the operation and management of industrial processes have also entered the network era. More and more information needs to be executed and managed by the host computer. The previous single-phase current / voltage The function of the measuring instrument product is completed by hardware design, the internal adjustable potentiometer is used to calibrate the instrument, and the information can only be known by looking at the instrument. There are problems such as inability to communicate with the host computer, large error in measurement parameters, and unstable performance. How to check the measurement parameters in a timely, effective and convenient manner...

AI Technical Summary

Problems solved by technology

[0002] With the increasingly higher requirements for the automation and intelligence of electrical equipment control, the operation and management of industrial processes have also entered the network era. More and more information needs to be executed and managed by the host computer. The previous single-phase current / voltage The functions of measuring instrument products are completed by hardware design, and the internal adjustable potentiometer is used to calibrate the instrument. Only by looking at the instrument can we know the information. There are problems such as inability to communicate with the host computer, large error in measurement parameters, and unstable performance.

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