CN201397233Y - Three-line pendulum oscillatory cycle measuring instrument - Google Patents
Three-line pendulum oscillatory cycle measuring instrument Download PDFInfo
- Publication number
- CN201397233Y CN201397233Y CN2009201273180U CN200920127318U CN201397233Y CN 201397233 Y CN201397233 Y CN 201397233Y CN 2009201273180 U CN2009201273180 U CN 2009201273180U CN 200920127318 U CN200920127318 U CN 200920127318U CN 201397233 Y CN201397233 Y CN 201397233Y
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- circuit
- microprocessor
- resistor
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- remote receiver
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Abstract
The utility mode discloses a three-line pendulum oscillatory cycle measuring instrument, wherein a baffle plate is arranged on an oscillating plate, oscillates back and forth along with the oscillating plate, periodically shields infrared rays between an infrared transmitter and a receiver, and generates a periodic pulse signal which is imputed in an SCM through a conversion circuit, and the SCM can measure pulse number and calculates the oscillatory cycle, displays the pulse number and the oscillatory cycle through an LCD, and can restore through a push buttons for newly measuring. The precise measurement for the cycle of a three-line pendulum can be realized through the three-line pendulum cycle measuring instrument.
Description
Technical field
The utility model belongs to motor car engine detection technique field, is specifically related to a kind of three string pendulums and rocks the period measurement device.
Background technology
The engine moment inertia test is the main path that obtains engine rigidity data, and it helps cae analysis engine luggine problem, and is significant for the preferred arrangement engine mounting.Present three string pendulum testers are major equipments of test engine moment of inertia, and it is particularly important that wherein three string pendulums rock the measurement in cycle, and measuring accuracy and accuracy will directly influence the correctness of moment of inertia test result.And therefore the test of main at present employing stopwatch exists bigger personal error, and bad measurement repeatability is measured the people for a long time and easily produced defectives such as fatigue.
Summary of the invention
The purpose of this utility model is exactly to remedy existing defective of rocking period measuring, provides a kind of high precision of special use to rock period measurement equipment.
To achieve these goals, the technical scheme that the utility model adopted is:
A kind of three string pendulums rock period meter, comprise infrared remote receiver, baffle plate, infrared transmitter, microprocessor, direct supply, on-off circuit.Described baffle plate is fixed on the described three string pendulum balances, described infrared transmitter transmitting terminal and infrared remote receiver receiving end over against, first output terminal of this infrared remote receiver is connected with the control end of described on-off circuit, first end of described on-off circuit guiding path links to each other with positive source by the 6th pull-up resistor, first end of this on-off circuit guiding path is connected to an input end of described microprocessor, the second end ground connection of described on-off circuit guiding path; When described three-phase pendulum is swung, baffle plate with three string pendulums rock and periodic oscillations between infrared transmitter and infrared remote receiver, thereby make described on-off circuit according to hunting period correspondingly switch or closure, and the level signal of first end of the on-off circuit guiding path by being input to described microprocessor is calculated rocking the cycle of three string pendulums.
The period meter continuous coverage is rocked the cycle for 50 times, shows the rest period number by LCD in the measuring process, after 50 times period measurement is finished, shows the whole integration period time, and its resolution is 0.0001 second.Three string pendulums rock period meter, comprise that also button, button are connected between the reset terminal and ground of microprocessor, and when button was pressed, microprocessor carried out period measurement again.
Can realize accurate measurement by three string pendulum period meters of the present utility model to three string pendulum cycles.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model schematic diagram;
Wherein, 1-infrared remote receiver, 2-baffle plate, 3-infrared transmitter, 4-resistance, 5-the 5th pull-up resistor, 6-the 6th pull-up resistor, 7-microprocessor, 8-direct supply 4.5V, 9-LCD LCD, 10-knob, 11-on-off circuit.
Embodiment
Also in conjunction with specific embodiments the technical solution of the utility model is further described according to Figure of description below.
Figure 1 shows that structural representation of the present utility model, in order more to clearly demonstrate technical scheme, in specific embodiment, select for use the NPN triode as on-off circuit, use single chip computer AT 89S52 as microprocessor, but be not limited to this, every can realize this use new function, are equivalent substitutions that conspicuous other on-off circuit and microprocessor all belong to identical function for described those skilled in the art.
The utility model uses an infrared emission receiver, transmitting terminal and receiving end over against, infrared remote receiver is connected with NPN type transistor base, passes through a pull-up resistor simultaneously and is connected with power supply; Transistor collector links to each other with single-chip microcomputer P3.2 pin, links to each other the direct ground connection of emitter simultaneously with positive source by pull-up resistor; Knob one end links to each other other end ground connection with the P1.7 pin of single-chip microcomputer; The LCD data line links to each other with P1.0, P1.1, the P1.2 pin of single-chip microcomputer respectively.
During test, on three string pendulum balances, place a baffle plate, baffle plate with three string pendulums rock and periodic oscillations between infrared transmitter and receiver, when baffle plate swung between infrared transmitter and the infrared remote receiver, infrared remote receiver can't receive infrared ray and be in high impedance status, and its pull-up resistor low pressure end becomes high level, be that transistor base is the high level input, the triode conducting, collector voltage descends, and imports with low level signal at the single-chip microcomputer input end; When baffle plate no longer blocked infrared ray, infrared receiver was in conducting state, and corresponding pull-up resistor and triode link voltage become low level, and triode ends, and collector voltage raises, and the single-chip microcomputer input end is imported with high level signal.Be single and rock the cycle interval time of twice low level triggering.
The period meter continuous coverage is rocked the cycle for 50 times, and LCD shows the rest period number in the measuring process, after 50 times period measurement is finished, shows the whole integration period time, and its resolution is 0.0001 second.
Button is a reset switch, and after pressing, single-chip microcomputer restarts to measure.
In schematic diagram shown in Figure 2, the utility model comprises an infrared transmitter 3 and an infrared remote receiver 1, and transmitting terminal and receiving end link to each other other end ground connection over against, infrared transmitter 3 by resistance 4 (selecting 1.2K resistance for use) and direct supply 8 are anodal; Infrared remote receiver 1 with is connected as the NPN type triode of on-off circuit 11 (this programme adopts C9014) base stage, link to each other by the 5th pull-up resistor 5 (selecting 3.3K resistance for use) and direct supply 8 positive poles simultaneously; The collector of triode links to each other with microprocessor 7 (this programme adopts AT89S52) external trigger pin P3.2, links to each other the direct ground connection of the emitter of triode by the 6th pull-up resistor 6 (selecting 10K resistance for use) with direct supply 8 positive poles simultaneously; Knob 10 1 ends link to each other other end ground connection with the P1.7 pin of microprocessor 7; LCD LCD 9 (this programme adopts LCM061A) data line links to each other with P1.0, P1.1, the P1.2 pin of single-chip microcomputer 7.
When baffle plate 2 swings between infrared transmitter 3 and the infrared remote receiver 1, infrared ray is blocked, infrared remote receiver 1 can't receive infrared ray, thereby be in high impedance status, the input of transistor base high level, the triode conducting, collector voltage descends, and imports with low level signal at microprocessor 7 input ends; When baffle plate no longer blocked infrared ray, infrared remote receiver 1 was in conducting state, and transistor base is a low level, and triode ends, and current collection is high level very, and microprocessor 7 input ends are imported with high level signal.Be the cycle of rocking the interval time of twice low level triggering.
Claims (4)
1, a kind of three string pendulums rock period meter, comprise infrared remote receiver (1), baffle plate (2), infrared transmitter (3), microprocessor (7), direct supply (8), on-off circuit (11); It is characterized in that: described baffle plate (2) is fixed on the described three string pendulum balances, described infrared transmitter (3) transmitting terminal and infrared remote receiver (1) receiving end over against, first output terminal of this infrared remote receiver (1) is connected with the control end of described on-off circuit (11), first end of described on-off circuit (11) guiding path links to each other by the 6th pull-up resistor (6) and power supply (8) are anodal, first end of this on-off circuit (11) guiding path is connected to an input end of described microprocessor (7), the second end ground connection of described on-off circuit (11) guiding path; When described three-phase pendulum is swung, baffle plate (2) with three string pendulums rock and periodic oscillations between infrared transmitter (3) and infrared remote receiver (1), thereby make described on-off circuit (11) according to hunting period correspondingly switch or closure, and the level signal of first end of on-off circuit (11) guiding path by being input to described microprocessor (7) is calculated rocking the cycle of three string pendulums.
2, three string pendulums according to claim 1 rock period meter, it is characterized in that: described measuring instrument also comprises LCD (9) and the 5th pull-up resistor (5), and the control end of described on-off circuit (11) links to each other with the positive pole of described direct supply (8) by the 5th pull-up resistor (5); Block the infrared ray that enters infrared remote receiver (1) back and forth by described baffle plate (2), after the pulse signal that produces is handled through the change-over circuit that is made of the 5th pull-up resistor (5), the 6th pull-up resistor (6) and on-off circuit (11), be input to the input end of microprocessor (7), after single-chip microcomputer is handled, show measurement result by LCD LCD (9).
3, three string pendulums according to claim 1 and 2 rock period meter, it is characterized in that: described microprocessor (7) is a single-chip microcomputer, and described on-off circuit (11) is a triode.
4, three string pendulums according to claim 1 and 2 rock period meter, it is characterized in that: described measuring instrument also comprises button (10), and button (10) is connected between the reset terminal and ground of microprocessor (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201273180U CN201397233Y (en) | 2009-05-15 | 2009-05-15 | Three-line pendulum oscillatory cycle measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201273180U CN201397233Y (en) | 2009-05-15 | 2009-05-15 | Three-line pendulum oscillatory cycle measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201397233Y true CN201397233Y (en) | 2010-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201273180U Expired - Lifetime CN201397233Y (en) | 2009-05-15 | 2009-05-15 | Three-line pendulum oscillatory cycle measuring instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN201397233Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566526B (en) * | 2009-05-15 | 2011-01-05 | 重庆长安汽车股份有限公司 | Three-Line pendulum torsional pendulum period meter capable of measuring the engine moment inertia |
| CN107389265A (en) * | 2017-09-22 | 2017-11-24 | 潍坊学院 | A kind of three-line pendulum |
| CN110954267A (en) * | 2019-12-06 | 2020-04-03 | 武汉轻工大学 | Three-wire pendulum rotation period measuring circuit and device |
-
2009
- 2009-05-15 CN CN2009201273180U patent/CN201397233Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566526B (en) * | 2009-05-15 | 2011-01-05 | 重庆长安汽车股份有限公司 | Three-Line pendulum torsional pendulum period meter capable of measuring the engine moment inertia |
| CN107389265A (en) * | 2017-09-22 | 2017-11-24 | 潍坊学院 | A kind of three-line pendulum |
| CN107389265B (en) * | 2017-09-22 | 2019-01-29 | 潍坊学院 | A kind of three-line pendulum |
| CN110954267A (en) * | 2019-12-06 | 2020-04-03 | 武汉轻工大学 | Three-wire pendulum rotation period measuring circuit and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100203 Effective date of abandoning: 20090515 |