CN201126430Y

CN201126430Y - Oil liquid quality detection apparatus allocated with liquid crystal display and printer

Info

Publication number: CN201126430Y
Application number: CNU2007201260196U
Authority: CN
Inventors: 张钢柱
Original assignee: Xian Tianhou Filter Technology Co Ltd
Current assignee: Xian Tianhou Filter Technology Co Ltd
Priority date: 2007-11-27
Filing date: 2007-11-27
Publication date: 2008-10-01
Anticipated expiration: 2017-11-27

Abstract

The utility model discloses an oil liquid quality detection device equipped with a liquid crystal display and a printer, the device comprises a power supply portion, an A/D converter, a single chip machine, a detection circuit, a detection control interface, an LCD display and a printer interface circuit, wherein the detection circuit includes a capacitor sensor measuring standard oil and oil to be detected, and an AC signal resource of the capacitor sensor, signals of two paths of the oil to be detected and the standard oil are collected by the detection circuit and inputted to the A/D converter after passing through a differential amplifying circuit, a zero-setting resistor, a filter circuit and a double-pole double-throw relay. The utility model has advantages of simple operation, rapid detection, visual display of the detection result, high detection precision, high detection sensitivity, good consistency and full intellectualization, the oil liquid quality detection device is equipped with a printer interface and an LCD display interface, so that the detection result is capable of being printed accurately and synchronously during detection.

Description

A kind of oil quality pick-up unit that disposes liquid crystal display and printer

Technical field

The utility model relates to oil quality detection technique field, especially relates to a kind of oil quality pick-up unit that disposes liquid crystal display and printer.

Background technology

In production, transportation and the storage process of lubricating oil itself, some pollution problems can occur inevitably, thereby before using, oil quality be detected most important.At present, all there are problems such as repeatability is relatively poor, sensitivity is on the low side in the oil quality pick-up unit great majority of use, are necessary each component units in the device, circuit connecting relation etc. are done to improve further.A kind of oil quality pick-up unit was disclosed among the disclosed utility model patent CN2478102Y on February 20th, 2002, the testing circuit of this pick-up unit comprises the capacitor and inductor bridge circuit and provides the ac signal which of AC signal for it, its detection sensitivity is higher, consistance is better, is necessary disclosed oil quality pick-up unit is improved further and optimizes.

The utility model content

Technical problem to be solved in the utility model is at above-mentioned deficiency of the prior art, a kind of oil quality pick-up unit that disposes liquid crystal display and printer is provided, this pick-up unit can be fast, accurately detect, and is easy and simple to handle, accuracy of detection height, high conformity.

For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of oil quality pick-up unit that disposes liquid crystal display and printer, comprise power pack 1, A/D converter 2, single-chip microcomputer 3, testing circuit 4, detect control interface 7, LCD display 5 and printer interface circuit 6, wherein testing circuit 4 comprises measurement standard oil and the capacitive transducer of measured oil and the ac signal which of capacitive transducer, and measured oil that described testing circuit 4 is gathered and standard oil two paths of signals are through differential amplifier circuit, zero-regulator resistor, be input to A/D converter 2 behind filtering circuit and the dpdt relay.

As a kind of preferred version of the present utility model, measured oil that described testing circuit 4 is gathered and standard oil two paths of signals are input to A/D converter 2 again behind secondary amplifying circuit, inverse filtering circuit and dpdt relay behind differential amplifier circuit, zero-regulator resistor.

Wherein said dpdt relay is TQ-2.

And described differential amplifier circuit is a master chip with operational amplifier A D620, and the secondary amplifying circuit is a master chip with operational amplifier OP07.

As another kind of preferred version of the present utility model, described single-chip microcomputer 3 is chip AT89C55WD, and A/D converter 2 is chip MC14433P, the VX end that measured oil that testing circuit 4 is gathered and standard oil two paths of signals input to chip MC14433P after treatment; Eight output terminal Q0-Q3, the DS1-DS4 of chip MC14433P join with input end P1.0/T, P1.1/T, the P1.2-P1.7 of chip AT89C55WD respectively, the output P0.0-P0.7 of chip AT89C55WD is after exclusion RB1 draws on voltage, output terminal P0.0-P0.6 and LCD 5 are joined, and output terminal P0.7 joins with detection control interface 7; The output P2.0-P2.7 of chip AT89C55WD after exclusion RB2 draws on voltage, output terminal P2.0-P2.6 with detect control interface 7 and join; Detecting control interface 7 joins by chip X9511 and LCD 5; And the VREF end of power pack 1 by chip MC1403, potentiometer W1 and chip MC14433P joins.

As another preferred version of the present utility model, the output terminal T0 of described chip AT89C55WD joins by diode D5, D3 and triode Q1, resistance R 7 and the hummer of two butt joints.

As further preferred version of the present utility model, the output terminal T1 of described chip AT89C55WD by two butt joints diode D4, D2 and triode Q2, resistance R 33 after connect LCD 5.

As further preferred version of the present utility model, output terminal INT1, the RXD of described chip AT89C55WD and TXD end join by chip MAX232 and printer interface circuit 6.

As another preferred version of the present utility model, output terminal RD, the WD of described chip AT89C55WD connects power pack 1 after by two operational amplifier LM393 that join.

To sum up, adopt a kind of oil quality pick-up unit that disposes liquid crystal display and printer of the utility model, have the following advantages: 1, easy and simple to handle, detection effect intuitive display; 2, detect fast; 3, accuracy of detection and sensitivity height, high conformity; 4, structure economics, reasonable; 5, full intellectualized, dispose special-purpose printer interface and LCD display interface, in detection with testing result accurately, show synchronously and print.

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Description of drawings

Fig. 1 is a kind of structured flowchart that disposes the oil quality pick-up unit of liquid crystal display and printer of the utility model.

Fig. 2 is the circuit theory diagrams of the utility model except that power pack.

Description of reference numerals:

The 1-power pack; The 2-A/D converter; The 3-single-chip microcomputer;

The 4-testing circuit; The 5-LCD display; The 6-printer interface;

7-detects control interface.

Embodiment

As shown in Figure 1, the oil quality pick-up unit of described configuration liquid crystal display and printer comprises power pack 1, A/D converter 2, single-chip microcomputer 3, testing circuit 4, detects control interface 7, LCD display 5 and printer interface 6.Power pack 1 after processing such as filtering circuit, is respectively other parts power supplies with power supply.Also standard oil that testing circuit 4 will collect and measured oil two-way sensor signal are transported to the signal input part of A/D converter 2 after comparison, amplification and Filtering Processing.Single-chip microcomputer 3 will be after the digital signal internal arithmetic after A/D converter 2 conversions be handled, transmit corresponding steering order to LCD display 5 and printer interface 6 respectively, LCD display 5 fast, in time testing result is shown, and printer prints testing result synchronously.Single-chip microcomputer 3 connects and detects control interface 7 simultaneously, by detecting the parameter type that control interface 7 is provided with needs mensuration.

As shown in Figure 2, in the described testing circuit 4, the signal acquisition circuit module is gathered standard oil and measured oil two-way sensor signal by capacitive transducer CX1, CX2, after two output terminal OUT1, OUT2 outputs, be input to A/D converter 2 through differential amplifier circuit, secondary amplifying circuit, inverse filtering circuit and dpdt relay.Specifically be first with standard oil and measured oil two-way sensor signal input difference amplifying circuit, this differential amplifier circuit is a master chip with chip AD620.Two paths of signals compared and processing and amplifying after output to the secondary amplifying circuit, carry out the second time and amplify, this secondary amplifying circuit is a master chip with chip OP07.Its inverse filtering circuit comprises operational amplifier chip OP07 and capacitor C 7.For improving the stability of signal, output signal is input to dpdt relay TQ-2 again after anti-phase and Filtering Processing simultaneously, afterwards signal is input to the signal input part VX end of A/D converter 2.Between differential amplifier circuit, secondary amplifying circuit, be serially connected with zero potentiometer WT, the diode D6 of another termination one forward conduction of this zero potentiometer.Before each the detection, need the resistance of this zero potentiometer is carried out corresponding adjusting, thereby guarantee the consistance that each time of this pick-up unit detects, the adjusting of this potentiometer resistance is the also each sensitivity that detects of influence simultaneously.In this oil quality pick-up unit, test item mainly is divided into water content detection project and comprehensive pollution value test item two classes, wherein comprehensive pollution value test item comprises pollution of soda acid lightweight oil and heavy metal pollution etc. again, and the effect of dpdt relay TQ-2 is the switching between the different test items of two classes when realizing detection.

In conjunction with Fig. 2, described single-chip microcomputer 3 is chip AT89C55WD, and A/D converter 2 is chip MC14433P.Eight output terminal Q0-Q3, the DS1-DS4 of chip MC14433P join with input end P1.0/T, P1.1/T, the P1.2-P1.7 of chip AT89C55WD respectively, the signal that transmits after analog to digital conversion to single-chip microcomputer 3.And after chip AT89C55WD accepts this digital signal, through inner processing computing is that JLCD1 and printer interface 6 send the control corresponding instruction to LCD display 5 respectively, and LCD display 5 is JLCD1 with the synchronous results' demonstration that detection is obtained of printer interface 6 and prints.The vdd terminal of chip MC14433P is a power end, and power pack 1 joins by the VREF end of chip MC1403, potentiometer W1 and chip MC14433P simultaneously, for A/D converter 2 is the accurate voltage that chip MC14433P provides a 2V.Link to each other by resistance R 5 between the CLKI of chip MC14433P and CLKO end, link to each other by capacitor C 4 between its RCIN and the CIN end, and RIN holds to hold by resistance R 6 and RCIN and joins.

The output P0.0-P0.7 of chip AT89C55WD is after exclusion RB1 draws on voltage, and output terminal P00-P06 and LCD 5 are that 4-6, the 11-14 pin of LCD1 joins, and control LCD 5 is that LCD1 shows synchronously; While output terminal P0.7 connects and detects control interface 7 is the 14th pin of keyboard JKEY1, thereby realizes that detecting control interface 7 is that keyboard JKEY1 is that LCD1 carries out corresponding control to LCD 5.And the output P2.0-P2.7 of chip AT89C55WD is after exclusion RB2 draws on voltage, and output terminal P2.0-P2.6 joins with the 1-7 pin that detects control interface 7, thereby realizes that detecting control interface 7 is that keyboard JKEY1 carries out corresponding control to single-chip microcomputer 3.The output terminal T0 of chip AT89C55WD joins by diode D5, D3 and triode Q1, resistance R 7 and the hummer BUZZER1 of two butt joints simultaneously, drives hummer BUZZER1 by triode Q1.When the soiling value parameter of the measured oil that is detected exceeded preset range, corresponding alerting signal was sent in chip AT89C55WD control hummer BUZZER1 action.And the output terminal T1 of chip AT89C55WD by two butt joints diode D4, D2 and triode Q2, resistance R 33 after connect the 15th pin that LCD 5 is LCD1, in testing process, be that LCD1 backlight carries out corresponding adjusting to LCD 5.Detecting control interface 7 is that keyboard JKEY1 is that LCD1 joins by chip X9511 and LCD 5, specifically be that detection control interface 7 is that the 8th, 9 pins of keyboard JKEY1 and the 1st, 2 pins of chip X9511 join, and output terminal the 5th pin of chip X9511 connects the 3rd pin that LCD 5 is LCD1, and the contrast of LCD 5 is regulated.The 8th, 9,14 pins that detect control interface 7 in addition and be keyboard JKEY1 connect the 5V power supply by resistance R 2, R3, R4 respectively.

Output terminal INT1, the RXD of described chip AT89C55WD and TXD end joins by chip MAX232 and printer interface circuit 6, and promptly output terminal INT1, RXD, TXD and P2.7 hold respectively R1OUT, R2OUT, T1IN and T2IN with chip MAX232 to hold to join.Through output terminal R2IN, the T1OUT of inter-process chip MAX232 and T2OUT is that the 6th, 3,4 pins of JCOM1 join with printer interface circuit 6 respectively, and output terminal R1IN connects JT the 2nd pin, the 2nd, 8 pins of JCOM1 and the 1st, 3 pins of JT join simultaneously, realize that single-chip microcomputer 3 is communicating by letter between the JCOM with printer interface circuit 6, control printer isochronous printing testing result.Link to each other by capacitor C 27 between two pins of the C1+ of chip MAX232 and C1-, link to each other by capacitor C 10 between two pins of C2+ and C2-, its V+ pin connects the 5V power supply after by capacitor C 13, and the V-pin is by capacitor C 16 back ground connection.Printer interface circuit 6 is that the 5th pin of JCOM1 is an earth terminal.Join in output terminal RD, the WD of described chip MC14433P and the power pack 1, the battery capacity in the power pack 1 is detected in real time by battery detection circuit.

The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of technical solutions of the utility model according to the utility model technical spirit.

Claims

1. oil quality pick-up unit that disposes liquid crystal display and printer, comprise power pack (1), A/D converter (2), single-chip microcomputer (3), testing circuit (4), detect control interface (7), LCD display (5) and printer interface circuit (6), wherein testing circuit (4) comprises measurement standard oil and the capacitive transducer of measured oil and the ac signal which of capacitive transducer, it is characterized in that: measured oil that described testing circuit (4) is gathered and standard oil two paths of signals are through differential amplifier circuit, zero-regulator resistor, be input to A/D converter (2) behind filtering circuit and the dpdt relay.

2. according to the described a kind of oil quality pick-up unit that disposes liquid crystal display and printer of claim 1, it is characterized in that: measured oil that described testing circuit (4) is gathered and standard oil two paths of signals are input to A/D converter (2) again behind secondary amplifying circuit, inverse filtering circuit and dpdt relay behind differential amplifier circuit, zero-regulator resistor.

3. according to claim 1 or 2 described a kind of oil quality pick-up units that dispose liquid crystal display and printer, it is characterized in that: described dpdt relay is TQ-2.

4. according to the described a kind of oil quality pick-up unit that disposes liquid crystal display and printer of claim 2, it is characterized in that: described differential amplifier circuit is a master chip with operational amplifier A D620, and the secondary amplifying circuit is a master chip with operational amplifier OP07.

5. according to claim 1 or 2 described a kind of oil quality pick-up units that dispose liquid crystal display and printer, it is characterized in that: described single-chip microcomputer (3) is chip AT89C55WD, A/D converter (2) is chip MC14433P, the VX end that measured oil that testing circuit (4) is gathered and standard oil two paths of signals input to chip MC14433P after treatment; Eight output terminal Q0-Q3, the DS1-DS4 of chip MC14433P join with input end P1.0/T, P1.1/T, the P1.2-P1.7 of chip AT89C55WD respectively, the output P0.0-P0.7 of chip AT89C55WD is after exclusion RB1 draws on voltage, output terminal P0.0-P0.6 and LCD (5) are joined, and output terminal P0.7 joins with detection control interface (7); The output P2.0-P2.7 of chip AT89C55WD after exclusion RB2 draws on voltage, output terminal P2.0-P2.6 with detect control interface (7) and join; Detecting control interface (7) joins by chip X9511 and LCD (5); And the VREF end of power pack (1) by chip MC1403, potentiometer W1 and chip MC14433P joins.

6. according to the described a kind of oil quality pick-up unit that disposes liquid crystal display and printer of claim 5, it is characterized in that: the output terminal T0 of described chip AT89C55WD joins by diode D5, D3 and triode Q1, resistance R 7 and the hummer of two butt joints.

7. according to the described a kind of oil quality pick-up unit that disposes liquid crystal display and printer of claim 5, it is characterized in that: the output terminal T1 of described chip AT89C55WD by two butt joints diode D4, D2 and triode Q2, resistance R 33 after connect LCD (5).

8. according to the described a kind of oil quality pick-up unit that disposes liquid crystal display and printer of claim 5, it is characterized in that: output terminal INT1, the RXD of described chip AT89C55WD and TXD end join by chip MAX232 and printer interface circuit (6).

9. according to the described a kind of oil quality pick-up unit that disposes liquid crystal display and printer of claim 5, it is characterized in that: output terminal RD, the WD of described chip AT89C55WD connects power pack (1) after by two operational amplifier LM393 that join.