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Multichannel voltage measurement recorder

A voltage measurement and multi-channel technology, applied in the direction of measurement using digital measurement technology, can solve the problems of high power consumption, high price, limited data storage, etc., and achieve the effect of portability, low power consumption, and simple structure

Inactive Publication Date: 2012-09-26
SCUD FUJIAN ELECTRONICS
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Problems solved by technology

[0002] In the existing electrical parameter measurement and recording products on the market, all of them have their own display screen and memory, so the data storage capacity of these products is limited, and they are large in size, expensive, and consume a lot of power.

Method used

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Experimental program
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Embodiment Construction

[0008] The specific implementation circuit is as figure 2 As shown, the description is as follows:

[0009] N1 in the figure is a microprocessor, which adopts PIC16F883 of MICROCHIP Company, and the chip has built-in RS232 serial interface and I2C interface. In order to make the measured voltage range larger, the input voltage is divided by the resistor 50:1 and then input to N5. N5 is CD4067, which is a 16-channel analog switch integrated circuit. The four IO pins of the RA port of N1 are connected to the four control terminals of ABCD of N5 to control the analog switches of each input channel to be turned on in turn. The output end of the analog switch is connected to the 16-bit high-precision A / D converter N4. After A / D conversion, the value is sent to the microprocessor N1 through the I2C interface of N4.

[0010] N1 is connected to the RS232 interface of the computer through the low-power RS232 level conversion circuit, and sends the data to the computer and displays ...

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Abstract

The invention discloses a data recorder product which can carry out voltage measurement of multiple channels and record continuous measurement results on a computer. During usage, the product is connected with the computer. A serial interface or a USB port of the computer is used to provide power. The product is controlled by a microprocessor. The microprocessor controls an analog switch group so that a measured voltage of the each channel (after partial pressure through using a precision resistor) is input through the analog switch. The input voltage carries out A / D conversion through an A / D converter. The microprocessor acquires an A / D conversion result of the each channel voltage and carries out data processing. Then, through the serial interface or the USB port, the processed data is transmitted to the computer, stores and displays on a computer interface. Because the product of the invention carries out data storage and displays the measurement result on the computer, power consumption is low. In some simplified application occasions, the serial interface of the computer can be used to provide power. The external power supply is not needed. A volume is small. Cost is low. A data storage amount is large. The recorder is convenient to be used and be carried.

Description

technical field [0001] The invention relates to a product for measuring, displaying and recording multi-channel electrical parameters, in particular to a product for measuring multi-channel voltage and displaying and storing the measurement results on a computer. Background technique [0002] In the existing electrical parameter measurement and recording products on the market, all of them have their own display screen and memory, so the data storage capacity of these products is limited, and they are large in size, expensive, and consume a lot of power. Computers are quite popular in modern society. Computers have the characteristics of large display screens and massive storage, and have strong data processing capabilities. Electrical parameter measurement and recording products have been widely used in the electronics industry. If electrical parameter measurement and recording products can be Part of the functions are processed by the computer, which can be small in size, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25
Inventor 俞峰
Owner SCUD FUJIAN ELECTRONICS
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