CN2704836Y

CN2704836Y - Cooled water pump performance testing system of vehicle engine

Info

Publication number: CN2704836Y
Application number: CN 200420035093
Authority: CN
Inventors: 吴彤峰; 罗文广; 向宇
Original assignee: Guangxi University of Science and Technology
Current assignee: Guangxi University of Science and Technology
Priority date: 2004-02-13
Filing date: 2004-02-13
Publication date: 2005-06-15
Anticipated expiration: 2014-02-13

Abstract

The utility model relates to a cooled water pump performance testing system of vehicle engine, comprising an industrial controlling machine (computer) system, an observing and controlling system, a test desk frame and an operation desk. The key technology is that an impulse counter interface card (2), an I/O interface card (3), A/D and D/A multiple function interface cards (4) are inserted into the industrial controlling machine (1) for realizing data acquisition and sending forth control commands; a differential pressure transducer (18) detects the pressure difference of the inlet and outlet of the tested water pump (19); the flow quantity detection and control device is composed of a flow quantity transducer (25), a gear (26), a stepping motor (27), a flow quantity adjusting valve (28), a position switch (29), a pulse generator (10) and a stepping motor driver (11); an asynchronous motor (22) drives the tested water pump (19), and the frequency speed control mode is realized by a frequency converter (7). The utility model has high degree of automation and reliability and easy operation.

Description

The automobile engine cooling water pump Performance Test System

Technical field

The utility model relates to a kind of pilot system that is used for the testing automobile component capabilities, especially for the pilot system of testing automobile engine cooling water pump performance.

Background technology

At present, the automobile engine cooling water pump Performance Test System becomes system controlled by computer by manual control, and existing Microcomputer Test System for Motor mainly contains Single Chip Microcomputer (SCM) system and microcomputer system two classes.Though the single-chip microcomputer test macro has low, the real-time controlled advantage such as strong of cost, also there are the shortcomings such as Single Chip Microcomputer (SCM) system plate poor reliability of the inconvenient and customization of man-machine interaction.The microprocessor based computer test macro is a kind of trend of development.According to relevant document, the implementation of this system is had nothing in common with each other, and typical characteristics are: (1) is imported and exported at water pump and is installed a pressure transducer respectively, detects its import and top hole pressure, calculates pressure reduction.Its shortcoming is: use two pressure transducers, cost is higher; Need two measured values in addition and calculate, increased the possibility and the error of calculation of measuring error.(2) aspect flow measurement and control, adopt electric gate valve to control, cost is higher and degree of regulation is not high enough; Do not solve the problems of measurement of maximum flow under different tested water pumps and the different test speed in addition, just can't accurately measure each flow point from zero to maximal value equably yet by the requirement of GB.(3) aspect signal measurement, the type of various sensor output quantities such as flow, pressure, moment of torsion, rotating speed and temperature is not quite similar, and the detection method of existing TT﹠C system is that they all are converted into voltage, sends into microsystem through the A/D conversion again.This mode has increased transformed error.(4) adopt direct current motor to drive tested water pump.Though this mode can smoothly adjustable-speed, the direct current motor price is higher, and direct supply is difficult to obtain usually.

Summary of the invention

For the deficiency that the existing automobile engine cooling water pump Performance Test System that overcomes as stated in the Background Art exists, the utility model provides a kind of novel test macro.

The technical scheme that its technical matters that solves the utility model adopts is: be made of industrial computer (computing machine) system, TT﹠C system, test-bed and operator's console.In the slot of industrial computer, insert A/D and D/A versatile interface card, I/O interface card and impulse meter interface card, be connected with sensor, topworks etc. with terminal board by external relay board.The inlet and outlet pressure difference of tested water pump is detected by differential pressure pickup, obtains a voltage, directly sends into industrial computer after the A/D conversion.Flow is detected by turbine type flow sensor, and it is output as pulse signal, directly sends into the impulse meter interface card, obtains its frequency after engineering is converted to flow value.Maximum flow measuring method: the fixing one stroke switch in appropriate location above flow control valve, its guide rod just in time makes the travel switch closure when the valve opening of variable valve reaches maximal value, send closure signal to industrial computer, the flow value that records this moment is maximum flow.The control principle of flow is: the control step motor driven gear, the aperture of the guide rod control valve of gear driven gate valve reaches the purpose of regulating flow.Adopt asynchronous motor to drive tested water pump, obtain various test speed, detect torque and the rotating speed that motor offers water pump with torque rotary speed sensor with frequency control way.It is coaxial that motor, torque rotary speed sensor and tested water pump are connected realization by hard axle.The utility model has directly been measured physical quantitys such as flow, pressure reduction, torque, rotating speed and water temperature, calculates by these measured values and obtains lift, shaft power and efficient.The intelligent PI algorithm based on expert system has been adopted in the adjusting of flow in an embodiment, and the integral separation PID algorithm is then adopted in the adjusting of rotating speed, obtains high control precision.

The beneficial effects of the utility model are: (1) each physical quantity has measurement loop separately, can measure each amount simultaneously, and test findings is more genuine and believable; (2) not only cost is low for the control technology scheme of flow, and controls effectively, is guarantee the whole test system performance basic, and is of value to the minimizing test period, raises labour efficiency; (3) system automation degree and reliability height are simple to operate.

Description of drawings

Fig. 1 is a structural principle block diagram of the present utility model.

Fig. 2 is the industrial computer program flow diagram.

Among the figure, 1. industrial computer, 2. impulse meter interface card, 3.I/O interface card, 4.A/D and D/A versatile interface card, 5. terminal board, 6. relay board, 7. frequency converter, 8. temperature transmitter, 9. printer, 10. pulse producer, 11. stepper motor drivers, 12. A.C. contactor, 13. operator's console, 14. hand valves, 15. water inlet pipe, 16. differential pressure pickups, 17. little flexible pipes, 18. anchor clamps, 19. water pumps, 20. torque rotary speed sensors, 21. hard axle, 22. asynchronous motors, 23. flexible pipes, 24. rising pipe, 25. flow sensors, 26. gears, 27. stepper motor, 28. flow control valves, 29. travel switches, 30. connection terminal, 31. air valves, 32. closed tanks, 33. water level gauge, 34. temperature sensors, 35. electric heaters.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

1, system architecture.Way of realization is that test macro is made of test-bed, operator's console (13) and both lines.Test-bed comprises: hand valve (14), water inlet pipe (15), be fixed on water inlet pipe (15) and go up differential pressure pickup (16), little flexible pipe (17), anchor clamps (18), torque rotary speed sensor (20), hard axle (21), asynchronous motor (22), flexible pipe (23), rising pipe (24), flow sensor (25), gear (26), stepper motor (27), flow control valve (28), travel switch (29), connection terminal (30), air valve (31), closed tank (32), water level gauge (33), temperature sensor (34), electric heater (35).Operator's console (13) has two-layer, and industrial computer (1) and printer (9) are placed in the upper strata, and impulse meter interface card (2), I/O interface card (3), A/D and D/A versatile interface card (4) are inserted on the motherboard of industrial computer (1); Lower floor divides two lattice again, wherein lattice have installed metal screen layer additional, terminal board (5), relay board (6), temperature transmitter (8), pulse producer (10), stepper motor driver (11) have been installed, and another lattice have then been installed frequency converter (7) and A.C. contactor (12).Three buttons and red, yellow, green three pilot lamp are arranged on the guidance panel of operator's console (13).Three buttons are controlled the switching of general supply, asynchronous motor power supply, heater power source respectively, and three pilot lamp are indicated general supply input, system's operation and well heater work respectively.

2, DATA REASONING comprises: pressure reduction, water tank water temperature, torque, rotating speed and flow.The turnover water end (W.E.) of differential pressure pickup (16) is by the water inlet and the water delivering orifice of two little flexible pipes (17) difference water pump, measure their pressure reduction, its output quantity is the DC voltage of 1～5V, and temperature sensor (34) is output as the voltage of 0～5V after temperature transmitter (8) conversion, this tittle is directly sent into multichannel A/D and D/A versatile interface card (4), after conversion, send into industrial computer (1), obtain physical quantity corresponding through the engineering conversion again.Torque rotary speed sensor (20) detects torque, rotating speed, flow sensor (25) detects flow, and their output is pulsed quantity, sends into multichannel impulse meter interface card (2) back and obtains pulsed frequency, send into industrial computer (1), obtain physical quantity corresponding through the engineering conversion.Travel switch (29) is used to measure peak flow values.

3, control comprises: the control of flow, rotating speed and water temperature.Flow control is to realize stepper motor (27) work when pulse signal is provided to stepper motor driver (11) by the aperture that stepper motor (27) driven gear (26) is regulated flow control valve (28) valve.Pulse signal is provided by pulse producer (10), and the contact of some relays of relay board (6) couples together the output terminal of pulse producer (10) and the pulse input end of stepper motor driver (11), and pulse signal is provided during this closing of contact.A/D and D/A versatile interface card (4) are given the sense of rotation of I/O signal (high and low level) the control step motor that stepper motor driver (11) provides.Rotating speed control is to adopt frequency control way to realize by frequency converter (7).Frequency converter (7) control is comprised two aspects: the closure of the some relays by I/O interface card (3) pilot relay plate (6), disconnect opening, stopping of control of conversion device (7); The out-put supply frequency of D/A (D/A switch) the passage output control of conversion device (7) by control A/D and D/A versatile interface card (4) reaches the purpose of speed governing.Temperature control is that the power supply switching of controlling electric heater (35) after the measurement feedback is realized.

In conjunction with Fig. 1 and Fig. 2 the course of work of the present utility model is described:

1, the preparation before the test.Add water for closed tank (32), by water level gauge (33) observed stage; Fixing tested water pump; Open hand valve (14).

2, initial work.Closed power switch starts industrial computer (1), moves application software of the present utility model, at first inputs user name and password; Enter the initialization interface, the input of finishing that Model of pump, test rated engine speed, flow measurement are counted, tachometric survey is counted etc.; After finishing initialization, enter runnable interface.

3, process of the test.This process is full-automatic.By industrial computer (1) motor speed is adjusted to given rotating speed, at first measure maximum flow, count according to the flow measurement of setting and to adjust each flow point equably to maximum flow from zero, measure flow, pressure reduction, torque, rotating speed and the water temperature of synchronization, calculate lift, shaft power and efficient according to measured value.In this process, runnable interface constantly shows each measured value, and simultaneity factor also on request control accuracy is regulated asynchronous motor speed and water temperature.

4, off-test.Counting when given rotating speed measures with flow point number average, and off-test stops the motor operation, printable test form automatically.

Claims

1, a kind of automobile engine cooling water pump Performance Test System, it is characterized in that: by industrial computer system, TT﹠C system, test-bed and operator's console (13) constitute, comprise: industrial computer (1), impulse meter interface card (2), I/O interface card (3), A/D and D/A versatile interface card (4), terminal board (5), relay board (6), frequency converter (7), temperature transmitter (8), printer (9), pulse producer (10), stepper motor driver (11), A.C. contactor (12), operator's console (13), hand valve (14), water inlet pipe (15), differential pressure pickup (16), little flexible pipe (17), anchor clamps (18), torque rotary speed sensor (20), hard axle (21), asynchronous motor (22), flexible pipe (23), rising pipe (24), flow sensor (25), gear (26), stepper motor (27), flow control valve (28), travel switch (29), connection terminal (30), air valve (31), closed tank (32), water level gauge (33), temperature sensor (34), electric heater (35), industrial computer system and TT﹠C system are installed in operator's console (13) lining, industrial computer system is by being inserted in the impulse meter interface card (2) of industrial computer (1), I/O interface card (3), A/D is connected and data information exchange with TT﹠C system with D/A versatile interface card (4), and TT﹠C system is connected with test-bed by lead.

2, test macro according to claim 1 is characterized in that: an installing differential pressure pickup (16) between water inlet pipe (15) and flexible pipe (23).

3, test macro according to claim 1 is characterized in that: stepper motor (27) is connected with flow control valve (28) by gear (26), and travel switch (29) is installed in flow control valve (28) top.

4, test macro according to claim 1 is characterized in that: frequency converter (7) is connected with asynchronous motor (22) by lead, and asynchronous motor (22) is connected with tested water pump (19) by hard axle (21).