CN2283856Y

CN2283856Y - Computer supersonic detector for railway axle

Info

Publication number: CN2283856Y
Application number: CN 96243393
Authority: CN
Inventors: 赵兴群; 夏翎; 韩桂生
Original assignee: Yangzhong dongda electronic equipment factory; Southeast University
Current assignee: Yangzhong dongda electronic equipment factory; Southeast University
Priority date: 1996-12-18
Filing date: 1996-12-18
Publication date: 1998-06-10
Anticipated expiration: 2006-12-18

Abstract

The utility model relates to a computer ultrasonic wave flaw detector for railway axles, mainly comprising an ultrasonic wave emission/receiving circuit, an attenuator, a program control amplifier, a wave detector, a mould/digital converter, a program control data real-time compression circuit, a central processing device, a sequence circuit, a control circuit, a printer interface, a communication interface, a keyboard, etc. The utility model can be matched with proprietary software for axle flaw detection, transverse wave axle flaw detection and minor angle axle flaw detection, so the direction of the utility model is stronger, and therefore, the utility model can judge whether the detected axle is qualified or not according to the preset quality criterion. The utility model has the advantages of stable performance, correct detection result, convenient output and record, convenient operation, etc., and the utility model is suitable for being used in railway maintenance departments.

Description

Railway axle computer ultra-sonic defect detector

The utility model relates to a kind of ultrasound examination instrument, particularly a kind of instrument that the axletree of rolling stock is detected.

Railway axle is one of critical component of train, its quality quality directly influences the traffic safety of railway, in order to ensure traffic safety, must and repair the used car axle to new system and carry out quality testing, to also must often carrying out the fatigue crack inspection at the axletree of using usefulness, so that in time find and fix a breakdown, and the ultra-sonic defect detector that uses at present is analog common defectoscope, the specific aim that axletree is checked is not strong, also to rely on manual record, analysis and failure judgement, have obviously that labour intensity is big, detection speed is slow and shortcoming such as automaticity is low.

The purpose of this utility model is in order to overcome above-mentioned weak point of the prior art, designs a kind of with strong pointsly, and detection speed is fast, can analyze automatically and failure judgement and can the higher railway axle computer ultra-sonic defect detector of self registering automaticity.

Technical measures of the present utility model are on the basis of existing ultra-sonic defect detector, mainly be to change Amplifier Gain control into control automatically according to instruction programmable amplifier by manual mechanical type waver by central processing unit, the special software that cooperates the flaw detection of normal probe axletree and the flaw detection of shear wave axletree and the flaw detection of low-angle axletree of addendum on original common software basis, make the specific aim of instrument stronger, can judge whether tested axletree is qualified according to predetermined quality standard, the circuit of this instrument is made up of following common circuit, promptly by ultrasonic emitting/receiving circuit, attenuator, amplifier, wave detector, A/D converter, programmable data Real Time Compression circuit, central processing unit, sequential circuit, display control circuit, display, not power down of high capacity storer, the I/O control circuit, printer interface, communication interface and keyboard are formed, amplifier wherein is a programmable amplifier, this programmable amplifier is by integrated circuit video amplifier U1, D/A converter U2, operational amplifier U3, three terminal voltage adjuster U4 and field effect transistor Q1, capacitor C 1-C3, resistance R 1-R3 forms, its annexation is: 1 pin that meets U1 from the echoed signal of attenuator output through C2, the 7th pin of U1 output terminal connects the input end of wave detector through C1,4 pin of U1 connect the Q1 source electrode, 11 pin connect the Q1 drain electrode, 5 pin connect-the 8V power supply, 10 pin connect+the 8V power supply, 14 pin ground connection, all the other pin do not connect, the Q1 grid meets C3 and R1, C3 other end ground connection, 6 pin of another termination of R1 U3 and 11 pin of U2,2 pin of U3 connect 13 pin of U2, the 3 pin ground connection of U3,4 pin connect-12V, 7 pin connect+the 12V power supply, all the other pin do not connect, 1 pin of U4 meets R2 and R3, R2 other end ground connection, 2 pin of another termination of R3 U4 and 10 pin of U2, the low eight bit data input end D0-D7 of U2 connects the data output end D0-D7 end of central processing unit respectively, the high four figures of U2 connects the data output end D0-D3 end of central processing unit respectively according to input end D8-D11,1 pin of U2 and 2 pin and 21 pin connect the VCA end of central processing unit, 22 pin of U2 and 23 pin connect the DL/DH end of central processing unit, 3 pin of U2 and 12 pin and 14 pin ground connection, 24 pin of U2 connect+the 5V power supply, and 3 pin of U4 connect+12V.

Accompanying drawing 1 is an overall circuit block scheme of the present utility model;

Accompanying drawing 2 is programmable amplifier circuit connecting relation figure of the present utility model.

Referring to accompanying drawing 1, this instrument is under the control of central processing unit and sequential circuit, finish hyperacoustic transmitting and receiving through emission/receiving circuit, attenuator is used for the excessive received signal of decay intensity, amplifier is made processing and amplifying to the weak signal that receives, wave detector detects the echoed signal of reflection axletree situation from carrier signal, analog to digital converter is converted to digital quantity with above-mentioned signal by analog quantity, programmable data Real Time Compression circuit is finished sampled data is carried out the Real Time Compression processing, Wave data and character graphic data after central processing unit will compress are sent into display control circuit together, under the cooperation of sequential circuit, display control circuit is converted to these data the vision signal of standard and uses for display, not power down of the built-in high capacity of instrument storer can be with the running parameter of instrument, the flaw detection data of operating personnel's input and the echoed signal that collects etc. also can be preserved after shutdown the long period, for retrieval afterwards, print or dump in the computer, the I/O control circuit is by connecting keyboard, make the flaw detection personnel operate the realization man-machine conversation to instrument, printer interface circuit drives the printer output result of detection, and communication interface circuit is connected to can be by the every data in work of computer remote control instrument and the unloading Instrument memory on the computing machine.In order to make this instrument energy operate as normal, gain switch in the amplifier must be changed into by central processing unit by manually operated waver and controlling automatically according to keyboard instruction, so, programmable amplifier is one of them key, the circuit connecting relation of this programmable amplifier as shown in Figure 2, U1 among the figure is the video amplifier of models such as LM733, U2 is the D/A converter of models such as DAC1210, U3 is the operational amplifier of models such as LF356, U4 is the adjustable voltage adjuster of three ends of models such as LM317, and Q1 is the technotron of models such as 3DJ7.During work, write least-significant byte and high 4 data input pins of U2 respectively from the D0-D7 end by DL/DH control from the data of central processing unit output, the current signal of exporting from 13 pin of U2 is converted to the grid voltage of voltage signal as Q1 through U3, the output voltage of U4 connects 10 pin of U2 as reference voltage, the resistance of regulating R2 can be adjusted the output voltage of U4, the current signal of exporting from 13 pin of U2 is controlled by central processing unit, and then the grid voltage of control Q1, the source electrode of Q1 and the resistance between the drain electrode are changed, realized utilizing the purpose of procedure auto-control amplifier gain.

Computer supersonic detector for railway axle of the present utility model just has stable and reliable for performance, testing result Really, the advantage such as output knot record is convenient, operation is easy to use and with strong points, can strictly carry out the detection rules, For detection department leaves accurately original record and account, eliminate human factor, effectively raise operating efficiency, Being fit to railway maintenance department uses.

Claims

1. a railway axle computer ultra-sonic defect detector comprises by ultrasonic emitting/receiving circuit, attenuator, amplifier, wave detector, A/D converter, programmable data Real Time Compression circuit, central processing unit, sequential circuit, display control circuit, display, not power down of high capacity storer, the I/O control circuit, printer interface, communication interface and keyboard are formed, it is characterized in that amplifier is a programmable amplifier, this programmable amplifier is by integrated circuit video amplifier U1, D/A converter U2, operational amplifier U3, three terminal voltage adjuster U4 and field effect transistor Q1, capacitor C 1-C3, resistance R 1-R3 forms, its annexation is: 1 pin that meets U1 from the echoed signal of attenuator output through C2, the 7th pin of U1 output terminal connects the input end of wave detector through C1,4 pin of U1 connect the Q1 source electrode, 11 pin connect the Q1 drain electrode, 5 pin connect-the 8V power supply, 10 pin connect+the 8V power supply, 14 pin ground connection, all the other pin do not connect, the Q1 grid meets C3 and R1, C3 other end ground connection, 6 pin of another termination of R1 U3 and 11 pin of U2,2 pin of U3 connect 13 pin of U2, the 3 pin ground connection of U3,4 pin connect-12V, 7 pin connect+the 12V power supply, all the other pin do not connect, 1 pin of U4 meets R2 and R3, R2 other end ground connection, 2 pin of another termination of R3 U4 and 10 pin of U2, the low eight bit data input end D0-D7 of U2 connects the data output end D0-D7 end of central processing unit respectively, the high four figures of U2 connects the data output end D0-D3 end of central processing unit respectively according to input end D8-D11,1 pin of U2 and 2 pin and 21 pin connect the VCA end of central processing unit, 22 pin of U2 and 23 pin connect the DL/DH end of central processing unit, 3 pin of U2 and 12 pin and 14 pin ground connection, 24 pin of U2 connect+the 5V power supply, and 3 pin of U4 connect+the 12V power supply.

2. railway axle computer ultra-sonic defect detector as claimed in claim 1, it is characterized in that U1 is the video amplifier of LM733 type, U2 is the D/A converter of DAC1210 type, U3 is the operational amplifier of LF356 type, U4 is the adjustable voltage adjuster of three ends of LM317 type, and Q1 is the technotron of 3DJ7 type.