CN201397317Y

CN201397317Y - Alternate collecting circuit for high-speed data collecting system in ultrasonic detection

Info

Publication number: CN201397317Y
Application number: CN200920071555XU
Authority: CN
Inventors: 刘宁; 龚威; 谢璟
Original assignee: Shanghai Cytrix Electrical Technology Co Ltd
Current assignee: Shanghai Cytrix Electrical Technology Co Ltd
Priority date: 2009-05-04
Filing date: 2009-05-04
Publication date: 2010-02-03
Anticipated expiration: 2019-05-04

Abstract

The utility model discloses an alternate collecting circuit for a high-speed data collecting system in ultrasonic detection, which collects a voltage signal Vi formed by an ultrasonic echo signal after being amplified in an uniform-amplitude manner. The alternate collecting circuit comprises two same A/D converters and an inverter. The two A/D converters receive the collected voltage signal Vi atthe same time and share one data bus, one A/D converter directly receives a sampling trigger signal CLK, and the other A/D converter receives the sampling trigger signal CLK by the inverter. The alternate collecting circuit for the high-speed data collecting system in ultrasonic detection has the advantages of low cost, high speed, high precision and the like.

Description

A kind of alternately Acquisition Circuit that is used for Ultrasonic Detection high speed data acquisition system (DAS)

Technical field

The utility model relates to the Ultrasonic Detection field, relates in particular to a kind of alternately Acquisition Circuit that is used for Ultrasonic Detection high speed data acquisition system (DAS).

Technical background

In the Non-Destructive Testing field, UT (Ultrasonic Testing) is a kind of detection technique of generally using.Because sound wave velocity of propagation in solid work to be detected is very fast, therefore require the very high speed of data acquisition system (DAS), because the echoed signal intensity difference of solid work to be detected is bigger, therefore the dynamic range that requires signal to amplify is bigger simultaneously.

At present, generally use the expensive high-speed a/d and the high speed amplifier of wide dynamic range to solve this difficult problem, but the cost height.

Summary of the invention

The purpose of this utility model is to overcome the defective of prior art, and a kind of alternately Acquisition Circuit that is used for Ultrasonic Detection high speed data acquisition system (DAS) is provided, and it has, and cost is low, speed fast, the precision advantages of higher.

The technical scheme that realizes above-mentioned purpose is: a kind of alternately Acquisition Circuit that is used for Ultrasonic Detection high speed data acquisition system (DAS), gather the voltage signal Vi that forms after the ultrasonic echo signal process constant amplitude processing and amplifying, wherein, comprise two identical A/D converters and a phase inverter, two A/D converters are accepted the voltage signal Vi that collects simultaneously, an and shared data bus, one of them A/D converter is directly accepted sampling trigger signal CLK, and another A/D converter is accepted sampling trigger signal CLK by described phase inverter.

The above-mentioned alternately Acquisition Circuit that is used for Ultrasonic Detection high speed data acquisition system (DAS), wherein, described data bus is the data bus of 12 bit resolutions.

The beneficial effects of the utility model are: alternately Acquisition Circuit of the present utility model is by using two identical A/D converters and a phase inverter, alternately gathering when having realized varying level, reduced cost, kept sampling precision, the sampling rate that is doubled.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

See also Fig. 1, there is shown a kind of alternately Acquisition Circuit that is used for Ultrasonic Detection high speed data acquisition system (DAS) of the present utility model, gather the voltage signal Vi that forms after the ultrasonic echo signal process constant amplitude processing and amplifying, the utility model comprises two identical A/D converters and a phase inverter F, two A/D converters are accepted the voltage signal Vi that collects simultaneously, and shared data bus Data0～11, one of them A/D converter is directly accepted sampling trigger signal CLK, another A/D converter is accepted sampling trigger signal CLK by phase inverter F, and data bus Data0～11 are the data bus of 12 bit resolutions.

In the present embodiment, two A/D converters are respectively the first A/D converter A/D1 and the second A/D converter A/D2, model is the THS1230 of TI company, the first A/D converter A/D1 and the second A/D converter A/D2 sampling trigger signal are respectively/CLK and CLK, these two signals are the clock signal of A/D converter, and speed reaches 500KHz.Carry out analog to digital conversion during high level, outside output data during low level, sampling trigger signal be respectively CLK and/CLK is that same clock provides, signal/CLK obtains through behind the phase inverter F for signal CLK, the model of phase inverter F is 74FCT14.When CLK is a high level, the second A/D converter A/D2 carries out analog to digital conversion, the outside output data of the first A/D converter A/D1.When CLK is a low level, the first A/D converter A/D1 carries out analog to digital conversion, the outside output data of the second A/D converter A/D2.One times of the sampling rate of A/D converter, it is constant to reach the 1MHz. precision, keeps 12 bit resolutions.

Below embodiment has been described in detail the utility model in conjunction with the accompanying drawings, and those skilled in the art can make the many variations example to the utility model according to the above description.Thereby some details among the embodiment should not constitute qualification of the present utility model, and the scope that the utility model will define with appended claims is as protection domain of the present utility model.

Claims

1. alternately Acquisition Circuit that is used for Ultrasonic Detection high speed data acquisition system (DAS), gather the voltage signal Vi that forms after the ultrasonic echo signal process constant amplitude processing and amplifying, it is characterized in that, comprise two identical A/D converters and a phase inverter, two A/D converters are accepted the voltage signal Vi that collects simultaneously, an and shared data bus, one of them A/D converter is directly accepted sampling trigger signal CLK, and another A/D converter is accepted sampling trigger signal CLK by described phase inverter.

2. the alternately Acquisition Circuit that is used for Ultrasonic Detection high speed data acquisition system (DAS) according to claim 1 is characterized in that described data bus is the data bus of 12 bit resolutions.