SoC (system-on-a-chip)-based automatic detection system of acoustic logging signal acquisition circuit

Abstract

The invention belongs to the circuit detection system technical field and comprises a SoC (system-on-a-chip)-based automatic detection system of an acoustic logging signal acquisition circuit. The SoC (system-on-a-chip)-based automatic detection system comprises an upper computer and a lower computer connected with the upper computer by a CAN bus; the upper computer is responsible for interacting with a user, controlling the lower computer, generating test signals and calculating the theoretical test response signals of a circuit under test according to the test instructions of the user, comparing the theoretical test response signals with actual measurement response signals acquired by the lower computer and judging whether a fault occurs; the lower computer includes a SoC FPGA chip as well as a CAN transceiver chip, a crystal oscillator chip, a DAC chip, an ADC chip, a power source chip, a DAC reference power source chip and an ADC reference power source chip which are all connected with the SoC FPGA chip; the SoC FPGA chip is connected with the upper computer through the CAN chip and the CAN bus; the DAC chip is connected with the input end of the circuit under test; and the test response analog signal output end and test response digital signal output end of the circuit under test are respectively connected with the ADC chip and the SoC FPGA chip. The system has the advantages of high integration, high stability, low power consumption, small size, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of acoustic wave detection applications, in particular to an automatic detection system of an SoC-based acoustic wave logging signal acquisition circuit, which can also be used for general detection of circuit boards. Background technique [0002] In the field of petroleum logging, sonic logging is a very important testing method. In the process of sonic logging, all testing links are carried out around the signal acquisition circuit, which can quickly and comprehensively test the signal acquisition circuit. Detecting and finding the location of the fault is of great significance to the sonic logging operation. At present, the detection of the circuit mainly relies on manual detection, which is inefficient and highly subjective. However, the existing electronic spare parts technology status automatically The detection system (patent 201310342045.2) works based on the PXI bus. The overall structure of the aut...

AI Technical Summary

Problems solved by technology

[0002] In the field of petroleum logging, sonic logging is a very important testing method. In the process of sonic logging, all testing links are carried out around the signal acquisition circuit, which can quickly and comprehensively test the signal acquisition circuit. Detecting and finding the location of the fault is of great significance to the sonic logging operation. At present, the detection of the circuit mainly relies on manual detection, which is inefficient and highly subjective. However, the existing electronic spare parts technology status automatically The detection system (patent 201310342045.2) works based on the PXI bus. The overall structure of the automatic detection system is as follows figure 1 As shown, it includes: a controller with automatic detection system software installed, a PXI system, a VPC connector, an adapter, a keyboard connected to the controller, and a display; The PXI module of corresponding slot in the middle is formed; Described adapter comprises system self-inspection adapter; Described controller is connected with PXI chassis by PXI bus; The signal end of each PXI module is connected with self-inspection adapter through VPC connector

Before using the automatic detection system to test the signal acquisition circuit, the user needs to design the test interface and test process first, which requires the user to be very familiar with the detection signal acquisition circuit; and the PXI bus was proposed by NI in 1997, A bus protocol that was promoted in 2010, its reference frequency is only 10MHz, which can no longer meet the needs of current circuit detection

Therefore, the automatic detection system has shortcomings such as low integration, single test content, and high requirements for testers, and it cannot accurately locate the faults of the circuit board.

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