CN2529222Y - Digital vibration noise measuring instrument - Google Patents

Abstract

The utility model discloses a digital detector for a vibrating noise used for measuring the vibration and noise in motor products and family electrical apparatus. The utility model consists of a charge magnifier, a unitary magnifier, a first integrator, a second integrator, a filter, an A calculated weight, a noise radiating curve and an AC record circuit. The utility model is characterized in that the utility model is also provided with an A/D conversion, a singlechip, a keyboard, a display circuit, a RS-232 interface circuit and a control circuit. due to adding the circuits, the utility model can become a new-generation digital intelligent detector for a vibrating noise. The utility model can measure the vibrating acceleration, velocity, displacement parameter and the noise grade for the products, even displayed by a LED. The agility and accurate degree are very high.

Description

Digital vibration noise detector

The utility model relates to a kind of digital vibration noise detector, belongs to technical field of measurement and test, is applicable to electromechanical testing, also is applicable to that electrical equipment, refrigerator etc. are dynamo-electric, the test of household appliances simultaneously.

In electronic product and household electronic products, the examination of noise level is listed among the technical standard.The index project of grade on the product is not only in the measurement of noise level, and is the whether qualified important indicator of product.The eighties begins to examine the load noise of motor abroad, subsequently China also regulation examine new Y2 motor load noise and list in its technical standard.China in 1996 have issued the technical standard GB/T16539 of " vibratory drilling method " test machine noise, Shanghai Electric Appliances Science Inst has carried out the research work of this respect during this period and developed this instrument of motor oscillating noise level monitor (patent No. ZL 00 2 1629.2) is to be made of mimic channel, can only illustrate it is primary products, should replace by more advanced digital product.

The purpose of this utility model be propose a kind of digitizing, can with the vibration noise detector simple and reasonable for structure of computing machine coupling, meet the digital development trend of instrument and meter.

Solution of the present utility model is: in the circuit of motor oscillating noise level monitor, increase on the basis by charge amplifier, kiichi amplifier, integrating amplifier, quadratic integral amplifier, A weighted noise radiation curve, wave filter, interchange writing circuit etc. and be made up of by A/D conversion, RS-232 interface, keyboard and display circuit, the control circuit of core single-chip microcomputer.Owing to increased above-mentioned Key Circuit, just constituted digitizing vibration noise detector of new generation.This instrument has high sensitivity, high resolving power, automatic range, numeral demonstration and RS-232 interface.

Further the utility model is illustrated below in conjunction with drawings and Examples.

Fig. 1 is an electric wiring block diagram of the present utility model;

Fig. 2 is the program flow diagram of the utility model tester;

Fig. 3 is the peculiar electric wiring schematic diagram of the utility model;

Fig. 4 is the panel synoptic diagram of the utility model tester;

Fig. 5 is the backboard synoptic diagram of the utility model tester.

With reference to Fig. 1, the utility model tester electric wiring block diagram shows, this instrument by charge amplifier 1, kiichi amplifier 2, integrating amplifier 3, quadratic integral amplifier 4, A weighted 5, noise radiation curve 6, a wave filter 7, exchange writing circuit 8, A/D conversion 9, single-chip microcomputer 10, keyboard and display circuit 11, RS-232 interface circuit 12, control circuit 13 and form.Wherein A/D conversion 9, single-chip microcomputer 10, keyboard and display circuit 11, RS-232 interface circuit 12, control circuit 13 are newly-increased circuit of the present utility model.The principle of work of whole instrument is as follows: the charge signal by the sensor input is sent into charge amplifier 1, obtain acceleration a after converting voltage signal to, through integrating amplifier 3,4 one quadratic integrals obtain speed V and displacement signal S respectively, rate signal is through A weighted 5, obtain noise signal L behind noise radiation curve 6 weighteds, these four kinds of signals are input to wave filter 7 by control circuit 13 controls, be input to A/D conversion 9 again and send into 8031 single-chip microcomputers 10, finish filtering and calculating by single-chip microcomputer, the result is shown by display window 11, or send into computing machine by RS-232 interface circuit 12, physical quantity of measuring and range can be set by keyboard 11, implement to determine by single-chip microcomputer 10 and control circuit 13.

With reference to Fig. 4, Fig. 5, the external structure of this instrument such as panel Fig. 4 and backboard Fig. 5 have function shift knob 15 on the panel, LED display window 16, dial 17, sensor input socket 19, print button 20, self check button 21, range switch button 22, automatic range button 23, sound source size button 24.Power switch 25 is arranged, record output 26, RS232 interface 27, overproof adjusting 28, noise compensation 29, fuse 31, supply socket 32, nameplate 30, casing 18 on the backboard.

With reference to Fig. 3, this circuit is increased part by the utility model, and its electrical schematic diagram quinquepartite is formed, and is respectively 8031 single-chip microcomputers 10, A/D conversion 9, keyboard and display circuit 11, RS232 interface 12, control circuit 13.Wherein 10 is single chip circuits, and it is by integrated package 8031,74LS373,2764, capacitor C 3, C5, DC5, and resistance R 4, crystal oscillator is formed, and mainly finishes functions such as function setting, numerical evaluation, demonstration as a result.The 11st, keyboard and display circuit, it is by integrated package 8155,74LS373, electric capacity F13, resistance R 5, R6, button KNOB, compositions such as LED, its function is to show measurement result, key assignments is pressed in response.The 12nd, the RS-232 interface circuit is made of integrated package MC1488, MC1489, and its function is to finish and the computing machine communication.The 13rd, control circuit, it is by integrated package 74LS373,74LS08,74LS10, MAX319, MAX339, MAX307, MAX318, electric capacity YC1, YC2, YC3, compositions such as resistor W2, W4, W6, W8, this partial circuit are mainly used in the input of finishing control signal, the selection of range etc.The 9th, A/D conversion, it is by integrated package AD571, LM308, capacitor C 1, C2, F14, resistance R 1, R2, resistor W1, diode Z1 forms, its function be will input analog signal conversion become discrete series to handle for single-chip microcomputer.

A kind of digital vibration noise detector is by charge amplifier 1, kiichi amplifier 2, integrating amplifier 3, quadratic integral amplifier 4, A weighted 5, noise radiation curve 6, wave filter 7, exchanging writing circuit 8 forms, it is characterized in that also having increased A/D conversion 9, single-chip microcomputer 10, keyboard and display circuit 11, RS-232 interface circuit 12, control circuit 13 and software program, its circuit connects the relation of joining: the input end of the output terminal of charge amplifier 1 and kiichi amplifier 2 joins, its output terminal joins with integrating amplifier 3 and control circuit 13 respectively, the output terminal of integrating amplifier 3 respectively with quadratic integral amplifier 4, A weighted 5, the input end of control circuit 13 joins, the input end of the output terminal of A weighted 5 and noise radiation curve 6 joins, the output terminal of noise radiation curve 6 and control circuit 13 join, the input end of the output terminal of control circuit 13 and wave filter 7 joins, the output terminal of wave filter 7 connects the input end that exchanges writing circuit 8 and A/D conversion 9 respectively, the output of A/D conversion 9 connects single-chip microcomputer 10, single-chip microcomputer 10 is connection control circuit 13 respectively, keyboard and display circuit 11 and RS-232 interface circuit 12, the above 10 is 8031 single chip circuits, it is by integrated package 8031,74LS373,2764, capacitor C 3, C5, DC5, resistance R 4, crystal oscillator is formed.The 11st, keyboard and display circuit, it is by integrated package 8155,74LS373, electric capacity F13, resistance R 5, R6, button, compositions such as LED.The 12nd, the RS-232 interface circuit is made of integrated package MC1488, MC1489.The 13rd, control circuit, it is by integrated package 74LS373,74LS08,74LS10, MAX319, MAX339, MAX307, MAX318, electric capacity YC1, YC2, YC3, compositions such as resistor W2, W4, W6, W8.The 9th, the A/D conversion, it is by integrated package AD571, LM308, capacitor C 1, C2, F14, resistance R 1, R2, resistor W1, diode Z1 forms, circuit connects the relation of joining: the simulating signal of mimic channel input inserts R1, be input to AD571 the 13rd pin through the LM308 amplification by LM308 the 6th pin, convert to behind the digital quantity on 2,3 pin that 10bit output pin by AD571 outputs to 8 pin of PB mouth of integrated package 8155 and PC mouth, be sent to 8031 data port then, result of calculation outputs to driver 74LS373 by 8031 P1 mouth and shows through LED; Keyboard array is realized that by 8155 expansions the row route selection takies PC0,1 pin, and the position route selection of column selection line and LED is multiplexing; 8031 program storage is 2764, and its low eight bit address are latched by 74LS373; MC1488 4,5 and connect 8031 TXD, 6 pin meet the RXD of computing machine, 3 pin of MC1489 meet 8031 RXD, 1 pin meets the TXD of computing machine, constitutes the RS232 interface; The data of 8031P1 mouth output latch through 74LS373.1,74LS373.1 2,5 pin output control MAX339.1, output to 74LS10 and 74LS08 simultaneously and carry out logical operation control MAX318, MAX319, the analog channel that MAX318, MAX319 and MAX339.1 form is selected measurement parameter such as acceleration, speed, displacement or noise; The data of 8031P1 mouth output latch through 74LS373.2,2, the 5 pin output control MAX339.2 of 74LS373.2, and the analog channel that MAX339.2 forms selects to measure range.

More than be hardware components explanation of the present utility model, its schematic circuit is a preferred embodiment of the utility model.This programme still comprises software section, below is illustrated with reference to accompanying drawing 2 with regard to the enforcement of software.

With reference to Fig. 2, software of the present utility model is made of timing interruption subroutine, serial interruption subroutine, electrification reset master routine three parts.Master routine is an electrification reset, single-chip microcomputer and peripheral components initiation parameter are set, the display reminding symbol is to show that instrument is normal then, can be used for measuring, judging then has or not button to press, as if having button then to judge the button number and carrying out corresponding function, do not go data acquisition if there is button then directly to change, and deal with data comprises digital filtering, calculating and update displayed data.Regularly interruption subroutine is to monitor keyboard in measuring process at any time, judges button then and carry out corresponding function in master routine if there is button that sign then is set, if no button then returns master routine, scans LED in this subroutine, shows measurement result.The communication of realization of serial interruption subroutine and computing machine, this program judges whether the data that computing machine transmits are orders, judge order and carry out corresponding function by master routine if sign then is set,, return master routine then if not order then transmits measurement data to computing machine.

As mentioned above, the utility model has been realized the digitizing of vibration noise detector, can measure acceleration, speed, displacement parameter and the machine noise level of machine vibration, directly show measurement result with LED, sensitivity, accuracy height, so owing to adopt program control amplification realizing fast automatic range on the range on a large scale, easy to use, in addition it have the RS232 standard interface can with the computer link on the product automatic inspection line, data are sent into Computer Processing and can be by the non-at-scene control of computer realization.

Claims (2)

1. a digital vibration noise detector comprises charge amplifier 1, kiichi amplifier 2, integrating amplifier 3, quadratic integral amplifier 4, A weighted 5, noise radiation curve 6, wave filter 7, exchange writing circuit 8, it is characterized in that: it has also increased A/D conversion 9, single-chip microcomputer 10, keyboard and display circuit 11, RS-232 interface circuit 12, control circuit 13 and software program, its circuit connects the relation of joining: the input end of the output terminal of charge amplifier 1 and kiichi amplifier 2 joins, its output terminal joins with integrating amplifier 3 and control circuit 13 respectively, the output terminal of integrating amplifier 3 respectively with quadratic integral amplifier 4, A weighted 5, the input end of control circuit 13 joins, the input end of the output terminal of A weighted 5 and noise radiation curve 6 joins, the output terminal of noise radiation curve 6 and control circuit 13 join, the input end of the output terminal of control circuit 13 and wave filter 7 joins, the output terminal of wave filter 7 connects the input end that exchanges writing circuit 8 and A/D conversion 9 respectively, the output of A/D conversion 9 connects single-chip microcomputer 10, single-chip microcomputer 10 is connection control circuit 13 respectively, keyboard and display circuit [11] and RS-232 interface circuit 12, the above 10 is 8031 single chip circuits, comprise integrated package 8031,74LS373,2764, capacitor C 3, C5, DC5, resistance R 4, crystal oscillator; The 11st, keyboard and display circuit comprise integrated package 8155,74LS373, electric capacity F13, resistance R 5, R6, button, LED; The 12nd, the RS-232 interface circuit comprises integrated package MC1488, MC1489; The 13rd, control circuit comprises integrated package 74LS373,74LS08,74LS10, MAX319, MAX339, MAX307, MAX318, electric capacity YC1, YC2, YC3, resistor W2, W4, W6, W8; The 9th, the A/D conversion comprises integrated package AD571, LM308, capacitor C 1, C2, F14, resistance R 1, R2, resistor W1, diode Z1; Its circuit connects the relation of joining: the simulating signal of mimic channel input inserts R1, be input to AD571 the 13rd pin through the LM308 amplification by LM308 the 6th pin, convert to behind the digital quantity on 2,3 pin that 10bit output pin by AD571 outputs to 8 pin of PB mouth of integrated package 8155 and PC mouth, be sent to 8031 data port then, result of calculation outputs to driver 74LS373 by 8031 P1 mouth and shows through LED; Keyboard array is realized that by 8155 expansions the row route selection takies PC0,1 pin, and the position route selection of column selection line and LED is multiplexing; 8031 program storage is 2764, and its low eight bit address are latched by 74LS373; MC1488 4,5 and connect 8031 TXD, 6 pin meet the RXD of computing machine, 3 pin of MC1489 meet 8031 RXD, 1 pin meets the TXD of computing machine, constitutes the RS232 interface; The data of 8031P1 mouth output latch through 74LS373.1,74LS373.1 2,5 pin output control MAX339.1, output to 74LS10 and 74LS08 simultaneously and carry out logical operation control MAX318, MAX319, the analog channel that MAX318, MAX319 and MAX339.1 form is selected measurement parameter such as acceleration, speed, displacement or noise; The data of 8031P1 mouth output latch through 74LS373.2,2, the 5 pin output control MAX339.2 of 74LS373.2, and the analog channel that MAX339.2 forms selects to measure range.

2, digital vibration noise detector according to claim 1, its feature are that also its software program comprises regularly interruption subroutine, serial interruption subroutine, electrification reset master routine.

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