An analog downhole temperature and pressure signal acquisition and display instrument

Abstract

The present invention provides a simulation down hole temperature pressure signal collection and display instrument. The instrument comprises a simulation temperature pressure signal generation module, a signal collection module, a serial sending module and an upper computer receiving and display module. The simulation temperature pressure signal generation module comprises a linear temperature pressure ROM data table and a DAC dual-channel conversion module, the linear temperature pressure ROM data table is stored in an mif file of an FPGA, the DAC dual-channel conversion module is configuredto circularly read data in the linear temperature pressure ROM data table according to a channel sequence and output corresponding formation temperatures and voltage values corresponding to formationpressures; the signal collection module comprises an analog-digital converter connected with a microcontroller, the microcontroller controls the analog-digital converter to collect the formation temperatures and the voltage values corresponding to the formation pressures, extract temperature data and pressure data from the formation temperatures and the voltage values corresponding to the formation pressures according to the channel sequence in real time and send the temperature data and the pressure data to the serial sending module; and the upper computer receiving and display module is configured to decode and display the temperature data and the pressure data in real time.

Description

technical field [0001] The invention relates to the technical field of drilling measurement, in particular to an instrument for collecting and displaying simulated downhole temperature and pressure signals. Background technique [0002] With the rapid development of electronics and information technology, microcomputers, single-chip microcomputers and their peripheral equipment have also been developed at a high speed and widely used. In order to highlight the superiority of automatic control and detect the integrity of the monitoring process, a single bus is used to control the equipment, devices and data signals of the acquisition system in the lower computer to facilitate the integration of system monitoring. Data acquisition technology mainly studies the acquisition, processing, storage and control of digital and analog information. Signal processing technology, sensor technology, computer technology and data acquisition technology together form the basis of modern detec...

AI Technical Summary

Problems solved by technology

The advantage of the first design scheme is that the hardware cost of the single-chip microcomputer of the lower computer is relatively low, and the disadvantage is that the software programming and debugging of the upper computer is more complicated, and the development cycle is long, which requires professionals to realize; the advantage of the second design scheme is that the software of the upper computer adopts LABVIEW graphics It has the advantages of simple and convenient programming, intuitive interface image, shortened development cycle, and can make quick changes to the system according to the needs of users; the disadvantage is that the data acquisition card of NI company is relatively expensive, which is a fortune for small and medium-sized enterprises. no small expense

Images