Multifunctional data acquisition card and measurement method

Abstract

The present invention belongs to the data acquisition field, in particular to a multifunctional data acquisition card and a measurement method. The multifunctional data acquisition card provided by the present invention comprises a communication interface circuit (1), a microcontroller (2), an analog-digital converter (3), a programmable amplifier (4), a measurement type switching module (5) and an input selection relay module (6). The multifunctional data acquisition card of the present invention acquires the types of the data, such as the voltages, the currents, the thermal resistance, the thermocouple, the resistance bridge type pressure sensor signals, etc., by switching the electronic switches, and the microcontroller is set to carry out the logic control, so that various types of data is acquired on a single data acquisition card, and the number of the devices applied by a related measurement system and the cost are reduced. According to the present invention, a relay is arrangedon the data acquisition card and is used to select whether a currently accessed measurement signal is a to-be-measured signal or a calibration signal, thereby realizing an online calibration function.

Description

technical field [0001] The invention belongs to the field of data acquisition, and in particular relates to a multifunctional data acquisition card and a measurement method. Background technique [0002] Data acquisition cards are used to collect various types of data. With the rapid development of modern equipment in the direction of digitization and informatization, data acquisition cards are more and more widely used in various fields. [0003] Most of the common data acquisition cards can only collect one type of data. When it is necessary to collect data of voltage, current, thermal resistance, thermocouple, resistance bridge pressure sensor signal, etc., it usually needs to be equipped with multiple types of different data acquisition cards. card, thereby increasing the cost and complexity of the system. Therefore, there is a need for a multi-function data acquisition card that can independently complete the above-mentioned various signal acquisitions. Contents of t...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of most existing data acquisition cards that can only collect one or a few types of data, the present invention provides a single hardware resource to collect data such as voltage, current, thermal resistance, thermocouple, and resistance bridge pressure sensor signals. Acquisition card and measurement method to reduce test cost

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