CN1280608C

CN1280608C - Supersonic thickness measurer with speech reading function

Info

Publication number: CN1280608C
Application number: CN 200410058091
Authority: CN
Inventors: 石坤; 陈钢; 邱杨; 陶雪荣; 张英平
Original assignee: CHINA SPECIFIC EQUIPMENT DETECTION RESEARCH CENTER
Current assignee: CHINA SPECIFIC EQUIPMENT DETECTION RESEARCH CENTER
Priority date: 2004-08-13
Filing date: 2004-08-13
Publication date: 2006-10-18
Anticipated expiration: 2024-08-13
Also published as: CN1587904A

Abstract

The present invention provides an ultrasonic thickness measuring instrument with a voice reading function, which is used in the field of the non-destructive inspection. The present invention comprises a host machine and a probe, wherein the probe comprises an ultrasonic impulse transmitting unit and an ultrasonic impulse receiving unit; the host machine comprises a CPU, an ultrasonic emission circuit, a signal receiving and amplifying circuit, a thickness wave forming circuit, a counter circuit, a display circuit and a keyboard. The present invention is characterized in that the ultrasonic thickness measuring instrument also comprises a voice circuit, a memory circuit and a USB universal serial bus interface circuit, wherein the USB interface circuit is formed by connecting the USB interface integrated circuit provided with a parallel bus with the CPU; the CPU is used for receiving the signals sent by other circuits and generates control signals to control other circuits; an ultrasonic thickness measuring circuit is controlled by the CPU, and the thickness value of the measured body is obtained after the calculation and treatment and is displayed at the same time. The measured data which can be read out by the voice circuit controlled by the CPU is controlled and output by the CPU and is stored in the memory; the data is uploaded to a PC by the USB interface so as to be analyzed and collected. The present invention has the advantage of strong practicability.

Description

A kind of supersonic thickness meter with voice read functions

Technical field

" a kind of supersonic thickness meter with voice read functions " is a kind ofly to possess the measurement data sound pronunciation and read ultrasonic thickness test instrument with memory function, can be widely used in the Non-Destructive Testing field.

Background technology

Ultrasonic thickness test is the inspection technology of a maturation in industrial circle, and its great advantage is a safety when detecting, easy, reliable, accurate and precision is high.Shown in the structured flowchart that Fig. 1 has audiogage both at home and abroad now, present supersonic thickness meter both domestic and external mainly is made up of main frame and probe two parts.Host circuit comprises that ultrasonic transmit circuit, ultrasonic signal receive amplifying circuit, thickness waveshaping circuit, counter circuit, liquid crystal display circuit and keyboard.The high-pressure shocking wave incentive probe that produces by radiating circuit during work, produce the ultrasonic transmit pulses ripple, pulsating wave is received circuit and receives after the reflection of medium interface, after the amplification, form the thickness ripple, obtain one-tenth-value thickness 1/10 after handling by single-chip microcomputer counting, show thickness value through LCDs LCD, it mainly multiply by time by sample according to the velocity of propagation of sound wave in sample half obtain the thickness of sample.Present part supersonic thickness meter host machine part also has RS232 standard serial communication interface circuit and can be connected with mini-printer or PC.

Yet it is relatively poor in detecting owing to condition of work, circumstance complication, when the checker when measuring, need a hand-held instrument, the another hand is measured, perhaps two hand-held instruments, eyes will replace the LCDs of the correct body position and the instrument of gaze detection, and the balance that also will keep health sometimes is (because the shape of detected equipment differs, the locus is indefinite, checker's body gesture will be along with the shape of equipment and locus and change during detection, may take the station, sit, crouch, bow, face upward, postures such as side), these have all increased checker's labour intensity, but also cause testing result distortion or mistake easily.

In addition, the communication of RS232 standard serial is a kind of data transmission technology of low speed, and transfer rate is generally between 9600bps～38400bps.When transmitting a large amount of detection data, need take a long time, it does not support plug and play and hot plug yet simultaneously, uses very inconvenient as checkout equipment.

Summary of the invention

The objective of the invention is to overcome existing supersonic thickness meter owing to the Presentation Function that only has measurement data, the inconvenience of bringing for detection person's measuring operation sometimes, and the distortion and the wrong shortcoming that cause assay easily, a kind of supersonic thickness meter with voice read functions has been proposed.

Technical scheme of the present invention such as Fig. 2 and shown in Figure 4, include main frame and probe two parts, wherein probe segment is divided into ultrasonic pulse transmitting probe and ultrasonic pulse receiving transducer, host machine part includes cpu central processing unit, ultrasonic transmit circuit, ultrasonic signal reception amplifying circuit, thickness waveshaping circuit, counter circuit, memory circuitry, display circuit and keyboard, CPU is used to receive the signal that other each circuit are sent, and the generation control signal is controlled other each circuit; CPU control ultrasonic thickness measurement circuit, the emission ultrasonic pulse, the ultrasonic signal of reception reflected back is after signal amplifies, form the thickness ripple, computing obtains the one-tenth-value thickness 1/10 of testee through CPU, is presented on the LCDs LCD, and memory circuitry is used to store one-tenth-value thickness 1/10, its data write and output is controlled by CPU, and connect to form by general flash memory FLASH ROM and CPU, it is characterized in that: also be provided with sound circuit, USB USB (universal serial bus) circuit; Sound circuit is connected to form by general speech chip and CPU, sound circuit is used to realize the voice count off, the voice of its output are subjected to CPU control, the P0 mouth P0.0 of CPU～P0.7 is connected to the address input A0～A7 of speech chip through latch U6, the P2.7 pin of CPU is connected to the PLAYL level playback end foot control system playback of this chip, the SP+ of speech chip and SP-loudspeaker output pin drive loudspeaker LS1, read the one-tenth-value thickness 1/10 that records; USB USB (universal serial bus) circuit is connected to form by the USB interface integrated circuit and the CPU of band parallel bus, CPU is by 8 bit data bus D0～D7, article 5, control line: reset signal RESET-N, read gate READ, write gate WRITE, pending signal SUSPEND, chip selection signal CS0 links to each other with the USB interface chip, CPU control is read data from memory circuitry, send into the USB interface chip, the USB interface chip is converted to data the datagram that meets the USB1.1 standard, be uploaded to PC, S1, C5, C6 forms the USB clock, by the clock input pin input of USB interface chip.

Described cpu central processing unit is atmel corp's 51 series monolithics, and CPU forms 8 bit data bus D0-D7 by adding a slice latch circuit, and 16 bit address bus A0-A15 form Single Chip Microcomputer (SCM) system; Control other each circuit working by the input/output signal of its each port.

The present invention adopts powered battery, through the power supply conversion circuit boost and voltage stabilizing after, power to system, CPU control ultrasound emission circuit, excitation ultrasound emission probe is to testee surface emitting ultrasonic pulse, ultrasonic receiving transducer receives the ultrasonic signal by the surface reflection of testee opposite side, the big circuit that veers away amplifies, the thickness waveshaping circuit is received the signal after the amplification, forms the thickness square wave, send counting circuit, finish counting, count value is sent CPU, and CPU calculates the one-tenth-value thickness 1/10 of testee, shows output by liquid crystal display circuit; Simultaneously by CPU control sound circuit, the term pronunciation goes out measurement data, and measurement data is exported in the storer by CPU control and stores, can be by the USB USB (universal serial bus) with the data upload in the storer to PC.

This instrument possesses measurement result data automatic speech read functions, and in thickness measuring, instrument carries out the voice reading automatically, and the reviewer can be absorbed in the testing process operation, thereby has improved the precision of survey record greatly, has reduced wrong generation; Greatly reduce reviewer's labour intensity simultaneously, improved work efficiency, also reduced since the check spatial alternation to the checker bring dangerous and inconvenient.

The RS232 standard serial communication interface transfer rate of using at present existing supersonic thickness meter is low, do not support plug and play, do not support the shortcoming of hot plug, and the present invention is by USB USB (universal serial bus) and PC communication.This interface has fast, the characteristics of plug and play, support hot plug, thereby makes thicknessmeter and being connected of computing machine more efficient, convenient.Communication speed reaches as high as 12Mbps, even transmit a large amount of measurement data, in the time of also can not causing data transmission, survey crew such as waits as long at problem.

Description of drawings.

The schematic block diagram of the existing audiogage of Fig. 1;

Fig. 2 schematic block diagram with supersonic thickness meter of voice read functions of the present invention;

The main circuit schematic diagram of the existing audiogage of Fig. 3;

Fig. 4 voice with supersonic thickness meter of voice read functions of the present invention read, data storage, usb circuit schematic diagram.

Embodiment

The present invention is further illustrated in conjunction with Fig. 2, Fig. 3, Fig. 4:

A kind of ultrasonic thicknessmeter of novel band voice read functions is made up of main frame and probe two parts.Wherein probe segment is divided into ultrasonic pulse transmitting probe and ultrasonic pulse receiving transducer; Host machine part is by cpu central processing unit, power-switching circuit, and the ultrasonic thickness measurement circuit, sound circuit, memory circuitry, USB USB (universal serial bus) circuit is formed.

Cpu central processing unit U5 is atmel corp's 51 series monolithics, and model is AT89C51.8 pin P0.0～P0.7 of its P0 mouth are as the data bus of total system, pass through address latch U6 simultaneously, model is 74LS373, and by ALE pin output gating 74LS373, latch address P0.0～P0.7 is as the least-significant byte A0～A7 of the address bus of total system during sheet addressing outward.P1.0, P1.1, P1.2 are connected to keyboard port in the P1 port.P1.3 is connected to the CCLR end of 82 system counters (U1), and model is 74HC590, and control counter makes zero.The break-make of P1.4 control field effect transistor BG5, thereby the emission of control ultrasonic pulse.The generation of P1.5 control thickness ripple.P1.6 is connected to the RESET-N reseting pin of USB interface integrated circuit PDIUSBD12 (U4), and control PDIUSBD12 resets.P1.7 is the outer FLASH storer U8 of sheet, and model is AT29C256, chip selection signal.P2.0～P2.7 is as the most-significant byte A8～A15 of system address bus in the P2 port.Wherein A15 is connected to speech chip U7, and model is IDS1420, the playback of PLAYL level playback end foot control system.Wherein the A14 sheet that is connected to address latch U6 selects pin LE, as the gating signal of U6.P3.0 in the P3 port, P3.1, P3.3 are connected to the LCD port.P3.2 is connected to the RCO end of 74HC590, obtains the counter spill over.The SUSPEND that P3.4 is connected to USB interface integrated circuit PDIUSBD12 (U4) hangs up pin, and control PDIUSBD12 work is still hung up.The CS sheet that P3.5 is connected to PDIUSBD12 selects pin, control PDIUSBD12 gating.P3.6 is as the write gate signal WRIDE of total system.P3.7 is as the read strobe signal READ of total system.S11 is the 12M crystal oscillator, for CPU provides work clock.C11 and C12 are the starting of oscillation electric capacity of crystal oscillator.

The ultrasonic thickness measurement circuit is by the ultrasonic pulse radiating circuit, the ultrasonic signal amplifying circuit, and the thickness waveshaping circuit, counter circuit, keyboard and liquid crystal display circuit are formed.When receiving measuring command, CPU control P1.4 output high level, make source electrode and the drain electrode conducting of field effect transistor BG5, encourage the external ultrasound emission sensor of B2 to testee surface emitting ultrasonic pulse, ultrasonic receiving transducer receives the ultrasonic signal by the surface reflection of testee opposite side, the external ultrasound wave of B1 is accepted sensor, receive the ultrasonic signal that reflects, the big circuit that veers away amplifies, and logical circuit is handled, and forms the thickness square wave at the clk end, send into the CCLK end of 82 system rolling counters forward 74HC590, enabling counting device counting, finish counting after, count value is sent CPU.CPU calculates the one-tenth-value thickness 1/10 of testee, shows output by liquid crystal display circuit.

Sound circuit is made up of a slice speech chip U7, and model is ISD1420.This chip uses CMOS technology inside, comprises clock on the sheet, Mike's prime amplifier, automatic gain control, bandpass filter, smoothing filter and power amplifier.The sampling frequency of 6.4KHz and 8.0KHz can be provided, the user can directly store the nonvolatile memory in the sheet according to the voice that voice quality is selected to take a sample into, does not need other means direct modeling stored energy of digitizing and compression that the voice music sound of true nature is provided.The ISD1420 storage inside voice document that records.After CPU calculates the one-tenth-value thickness 1/10 of measurement, read measured value automatically by CPU control sound circuit.The course of work is, at first (P0.0～P0.7) is connected to the address input of speech chip through latch U6, and (A0～A7), according to measured value, addressable storage is the voice document in the appropriate address in the ISD1420 internal storage for the P0 mouth of CPU.Next step, the P2.7 pin of CPU is connected to the PLAYL level playback end foot control system playback of this chip, and the signal of this pin will begin playback operation when being low by hypermutation, and playback finishes back PLAYL and becomes high level, and playback stops.After finishing playback, device enters the power down standby mode automatically.SP+ and SP-loudspeaker output pin drive loudspeaker LS1.Numerical value address input according to the highest two bit address positions has two kinds of functions.When A7, A6 had at least one to be 0, the address input was thought in input, and the address of input is taken as the start address of current playing.The address input is latched at the negative edge of signal at PLAYL.When the highest two A7, the A6 of address are high level, remaining address bit will be become state flag bit and no longer will be address bit, and speech chip enters operator scheme, comes the control operation pattern by CPU.

Memory circuit is made up of a slice FLASH ROM (U8), and model is AT29C256.Capacity is up to 256KBit, and the read cycle time is little of 70ns.After CPU calculates the one-tenth-value thickness 1/10 of measurement, measured value is stored among the storer AT29C256.Write gate WRITE and chip selection signal CS1 output low level gated memory.Storer is by 14 bit address bus A0～A13 addressing, again by 8 bit data bus D0～D7 with data storage in corresponding address space.C4 is the decoupling capacitor of power supply.CPU control write gate signal WRITE deposits measurement data in the storer in during measurement; When needs uploaded to PC with measurement data, CPU control read strobe signal READ read measurement data from storer.

USB USB (universal serial bus) circuit is made up of the USB interface chip PDIUSBD12 (U4) of a slice band parallel bus.PDIUSBD12 is the very high USB interface device of a cost performance, meets the standard of USB1.1 version fully, and transfer rate is up to 12Mbps.After outwork finishes, CPU control can be delivered to USB interface to the data that are temporary in the storer by the CPU taking-up down, be connected to the USB interface of PC by the usb communication cable, PC is stored in the PC hard disk after receiving, and carries out data analysis or data and compiles record.Just can control read gate READ and chip selection signal CS1 output low level gated memory by CPU, by 14 bit address bus A0～A13 addressing, the usb data port is delivered in the data taking-up that will be temporary in the storer by 8 bit data bus D0～D7 again, CPU is gating PDIUSBD12 again, the data that receive are converted to the packet that meets the USB1.1 standard, from D+, the D-pin sends to J1, and J1 is USB cable socket, USB port.Be connected to the USB interface of PC by the usb communication cable, PC is stored in the PC hard disk after receiving data.S1, C5, C6 form the USB clock, by the clock input pin input of U4.R5, R6 are order wire impedance matching resistance, and R3 is an order wire positive pull-up resistor, and R4 is the anti-phase pull down resistor of order wire.C1, C2, C3 are that order wire removes lotus root electric capacity.C4 is that power supply removes lotus root electric capacity.

This instrument is when detecting, probe is placed object surfaces, the probe ultrasonic waves transmitted enters detected object by couplant, ultrasound wave all will reflect in the front and rear surfaces of object, the time interval of two secondary reflections can obtain the thickness of testee through converting, and its result provides in the mode that numeral shows and voice take place.After detected data deposited storer in successively, the staff can be uploaded to measurement data among the PC by USB interface, carried out data analysis or data and compiled record.The present invention is simple, convenient, practical.

Claims

1, a kind of supersonic thickness meter with voice read functions, include main frame and probe two parts, wherein probe segment is divided into ultrasonic pulse transmitting probe and ultrasonic pulse receiving transducer, host machine part includes cpu central processing unit, ultrasonic transmit circuit, ultrasonic signal reception amplifying circuit, thickness waveshaping circuit, counter circuit, memory circuitry, display circuit and keyboard, CPU is used to receive the signal that other each circuit are sent, and the generation control signal is controlled other each circuit; CPU control ultrasonic thickness measurement circuit, the emission ultrasonic pulse, the ultrasonic signal of reception reflected back is after signal amplifies, form the thickness ripple, computing obtains the one-tenth-value thickness 1/10 of testee through CPU, is presented on the LCDs LCD, and memory circuitry is used to store one-tenth-value thickness 1/10, its data write and output is controlled by CPU, and connect to form by general flash memory FLASH ROM and CPU, it is characterized in that: also be provided with sound circuit, USB USB (universal serial bus) circuit; Sound circuit is connected to form by general speech chip and CPU, sound circuit is used to realize the voice count off, the voice of its output are subjected to CPU control, (P0.0～P0.7) is connected to the address input (A0～A7) of speech chip to the P0 mouth of CPU through latch U6, the P2.7 pin of CPU is connected to the PLAYL level playback end foot control system playback of this chip, the SP+ of speech chip and SP-loudspeaker output pin drive loudspeaker LS1, read the one-tenth-value thickness 1/10 that records; USB USB (universal serial bus) circuit is connected to form by the USB interface integrated circuit and the CPU of band parallel bus, CPU is by 8 bit data bus (D0～D7), article 5, control line: reset signal RESET-N, read gate READ, write gate WRITE, pending signal SUSPEND, chip selection signal CS0 links to each other with the USB interface chip, CPU control is read data from memory circuitry, send into the USB interface chip, the USB interface chip is converted to data the datagram that meets the USB1.1 standard, be uploaded to PC, S1, C5, C6 forms the USB clock, by the clock input pin input of USB interface chip.

2, a kind of supersonic thickness meter according to claim 1 with voice read functions, it is characterized in that: cpu central processing unit is atmel corp's 51 series monolithics, CPU is by adding a slice latch circuit, form 8 bit data bus (D0-D7), 16 bit address buses (A0-A15) are formed Single Chip Microcomputer (SCM) system; Control other each circuit working by the input/output signal of its each port.