CN1108605A - Micro computer monitoring and controlling apparatus for water-resistance dynamometering system of diesel locomotive and method thereof - Google Patents
Micro computer monitoring and controlling apparatus for water-resistance dynamometering system of diesel locomotive and method thereof Download PDFInfo
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- CN1108605A CN1108605A CN 94111681 CN94111681A CN1108605A CN 1108605 A CN1108605 A CN 1108605A CN 94111681 CN94111681 CN 94111681 CN 94111681 A CN94111681 A CN 94111681A CN 1108605 A CN1108605 A CN 1108605A
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Abstract
The supervisory control microcomputor and method thereof for the water-resistance dynamometer system of diesel locomotive can automatically adjust the lifting of the floating plate used in the water-resistance dynamometer system through closed-loop control according to the present load current of diesel locomotive to make the current unchange, it also can control relevant executing elements according to the tested water-temp. level signal in the water-resistance dynamometor system and by using optimum logical expression to make the water-resistance temp. keep at 60-80 degree C. and the water-resistance tank in the optimum condition of full level. Said system can simultaneously detect and display the current, voltage and power and fault-alarming, emergency cutt-off etc.
Description
The invention belongs to the diesel locomotive waterr rheostat test and its power-measuring system is carried out the device of micro computer monitoring.
Known diesel locomotive waterr rheostat test power-measuring system all adopts manual control at present, the major defect of this method is, along with the power-measuring system water temperature changes and the adjustment of diesel locomotive component parameter, given electric current will change thereupon, especially when given big electric current, water temperature sharply rises, water resistance is sharply reduced, cause also steep variation of given electric current, even the special messenger controls power-measuring system and technology is very skilled, also be difficult to keep given electric current constant, test error is big, stability is bad thereby cause, and has influenced test mass.In addition, known " diesel locomotive " 87 years 6 phases " calculating of dong feng 4 locomotive water resistance power measurement arrangement " are introduced, power-measuring system water resistance temperature remains in 60 ℃～80 ℃ scopes and is advisable, and at present this temperature by manual control, have problems such as operation inconvenience, control accuracy difference, fail to make power-measuring system to give play to maximum capacity.
When task of the present invention just provides the diesel locomotive waterr rheostat test power-measuring system is carried out the microprocessor-based monitoring device and the method for optimal control.
The feature of diesel locomotive water resistance power-measuring system microprocessor-based monitoring device of the present invention be microprocessor-based monitoring device according to given diesel locomotive load current value by the lifting that closed loop control comes movable pole plate in the automatically regulating water resistance power-measuring system, electric current is remained unchanged; On the other hand,, control corresponding power element, make the water resistance temperature remain in 60 ℃～80 ℃ scopes and the optimum state of water resistance groove full-water level by optimum logical expression according to water temperature, water level signal in the detected water resistance power-measuring system.
The present invention adopts manual control to compare with known diesel locomotive water resistance power-measuring system, has following obvious advantage:
A. the given load current of diesel locomotive carries out the closed loop automatic guidance during waterr rheostat test, remains unchanged, and therefore is convenient to observe and adjust the diesel locomotive parameters, makes test accuracy improve.
B. the power-measuring system water resistance always works in optimum state, can obtain lower and more stable electrical resistivity, so current setting is steady, and power-measuring system can have been given play to maximum capacity.
C. can detect automatically, show power, avoid known waterr rheostat test to need artificial horsepower rating.
D. power-measuring system is realized automatic guidance fully, has therefore alleviated testing crew labour intensity.
Therefore control monitor unit of the present invention need not changed known waterr rheostat test original equipment, only can realize micro computer monitoring or former manually operated conversion by change-over swith S3, has that cost is low, the reliability advantages of higher, is convenient to the user and accepts.
The feature of microprocessor-based monitoring device of the present invention can clearly explanation from the accompanying drawing of the following example.
Fig. 1 is a hardware composition frame chart of the present invention
Fig. 2 is a circuit diagram of the present invention
Fig. 3 is a primary module flow chart of the present invention.
Fig. 4 is a power-measuring system current closed-loop automatic control module flow chart of the present invention.
Fig. 5 is a power-measuring system water resistance optimal control modular program block diagram of the present invention.
By shown in Figure 1, compositions such as the main micro controller system of control monitor unit hardware components of the present invention, I/O expansion interface, storage circuit, sample circuit, photoelectric isolating driving circuit.Can clearerly see by Fig. 2, when carrying out the diesel locomotive waterr rheostat test, after given current value of the keyboard on the control monitor unit and order, control monitor unit is obtained current sampling signal from diverter R, sends into the A/D change-over circuit of being made up of U2 after handling through the preposing signal process circuit that is made of U4 and converts digital quantity input microcomputer to.Microcomputer compares processing with given value and sampled value, the control signal of sending is driven the coil Q1 and the Q2 of the movable pole plate lifting of power-measuring system dragging motor MI rotating reversing contactor by the buffer circuit that is made of solid-state relay SSR, can realize the lifting of the movable pole plate of power-measuring system, also just realize size of current control, thereby kept the set point electric current constant.When needs detect demonstration diesel locomotive power, after giving an order by the keyboard on the control monitor unit, control monitor unit is at first obtained current sampling signal from R, convert digital quantity input microcomputer to through sending into the A/D change-over circuit of forming by U2 after the fore-lying device processing that constitutes by U4, control monitor unit is obtained voltage sampling signal from bleeder R29, R30 then, send into the A/D change-over circuit of forming by U3 and convert digital quantity input microcomputer to, microcomputer multiplies each other current value and the magnitude of voltage that samples, and after digital processing, deliver to the display space, realize that power shows.
The switching value signal of the inflow temperature relay K 1 that control monitor unit of the present invention is installed on one's body to power-measuring system water resistance groove, leaving water temperature relay K 2 and level relay K3 carries out the timing interrupt inquiry, and the power element action truth table (seeing Table 1) during according to the optimum mode of operation of water resistance is set up the control logic expression formula of entering water electromagnetic valve T3 and water-circulating pump M3, be X=a+bc, y=bc, thereby guarantee that water resistance is operated in water resistance groove inflow temperature 〉=60 ℃, leaving water temperature≤80 ℃, the optimum state of fills with water all the time.Have no progeny in pole plate bound bit switch S1 that control monitor unit is installed on one's body to power-measuring system water resistance groove and the switching value signal response of S2, send on the one hand buffer circuit that alarm indication forms through SCR drive annunciator DL and telltale H＜, putting Q1 and Q2 on the other hand is zero state, the movable pole plate of power-measuring system is stopped, preventing from that pole plate from crossing the border to be short-circuited or the major accident of arcing.
Control monitor unit software section of the present invention all adopts the module programming method, mainly contains primary module, sampling module, display module, parameter detecting display module, anxious processing module, power-measuring system current closed-loop automatic control module, the power-measuring system water resistance optimal control module etc. of stopping of fault alarm.Wherein anxious to stop processing module be highest priority interrupt executive mode module to fault alarm, and power-measuring system water resistance optimal control module be a timing interrupt inquiry executive mode module.Representative type main modular feature can clearly explanation from the accompanying drawing of embodiment.
Fig. 3 has shown microprocessor-based monitoring device master control program of the present invention.As shown in Figure 3, program begins, at first 8031 INT0 is interrupted, T0 regularly interrupts, P1 mouth, 8155(1), 8155(2) and data buffer initialization, after this enter keyboard and display management, promptly by key scanning, when pressing numerical key, transfer display module, when pressing function key, change corresponding functional modules.
Fig. 4 has shown that microprocessor-based monitoring device of the present invention carries out the current closed-loop automatic control process to power-measuring system.As shown in Figure 4, after program begins, at first to 8031 P1 mouth and data buffer initialization, after this carry out current sample, for preventing to disturb, improve sampling precision and reliability, sampled result is carried out digital filter, then sampled value and given value are compared, when sampled value during greater than given value, microcomputer sends movable pole plate rising signals, and when sampled value during less than given value, microcomputer sends movable pole plate dropping signal, when sampled value equals given value, microcomputer sends movable pole plate danger signal, thereby has realized movable pole plate according to given current value automatically regulating, and is constant with holding current.When movable pole plate changes mode of operation, adopt the software delay method, to guarantee its reliable commutation.
Fig. 5 has shown that microprocessor-based monitoring device of the present invention is optimized control process to the water resistance of power-measuring system.As shown in Figure 5, enter interrupt service routine after microcomputer response T0 regularly interrupts.At first close and interrupt; keep the scene intact; inquire about power-measuring system Inlet and outlet water temperature relay and level relay state then; obtain corresponding switching value signal; through logic operation; obtain the logical formula x and the y that set up by table 1, and control entering water electromagnetic valve T3 and water-circulating pump M3 in the power-measuring system respectively with x and y.Recover on-the-spot at last, open and interrupt and return.
Claims (2)
1, a kind of device that adopts system controlled by computer diesel locomotive water resistance power-measuring system comprises:
(1) is used for power-measuring system is carried out programme controlled microcomputer system;
(2) be used to import the keyboard of data and control command;
(3) be used to be shown to the telltale of definite value and sampled value;
(4) be used to drive the photoelectric isolated driver of water resistance power-measuring system power element;
It is characterized in that this device also comprises:
(5) be used for the water resistance power-measuring system is carried out current closed-loop automatic guidance and the electric current that detect to show, voltage, power and the electric current, the voltage sampling circuit that are provided with;
(6) be used for the water resistance power-measuring system is optimized control and the water resistance groove Inlet and outlet water temperature of setting and the sample circuit of water level;
(7) attention display that is used for fault and prevents accident and take place.
2, a kind of method that adopts system controlled by computer diesel locomotive water resistance power-measuring system is characterized in that:
(1) microprocessor-based monitoring device is by behind the given diesel locomotive load current value of keyboard, obtain current sampling signal from current sampling circuit, treated amplification back converts digital quantity input microcomputer to by A/D converter, microcomputer compares and treats sampled value and given value, sends movable pole plate ascending, descending in the water resistance power-measuring system, stops control signal according to comparative result;
(2) microprocessor-based monitoring device obtains corresponding switching value signal by Inlet and outlet water temperature relay and the level relay of installing on the water resistance cell wall in the water resistance power-measuring system, through logic operation, draw the logic control equation of being tried to achieve, control entering water electromagnetic valve and water-circulating pump in the water resistance power-measuring system respectively by " water resistance optimum state power element action truth table (table 1) ".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111681 CN1108605A (en) | 1994-03-18 | 1994-03-18 | Micro computer monitoring and controlling apparatus for water-resistance dynamometering system of diesel locomotive and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111681 CN1108605A (en) | 1994-03-18 | 1994-03-18 | Micro computer monitoring and controlling apparatus for water-resistance dynamometering system of diesel locomotive and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1108605A true CN1108605A (en) | 1995-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94111681 Pending CN1108605A (en) | 1994-03-18 | 1994-03-18 | Micro computer monitoring and controlling apparatus for water-resistance dynamometering system of diesel locomotive and method thereof |
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| Country | Link |
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| CN (1) | CN1108605A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302347C (en) * | 2003-06-06 | 2007-02-28 | 株洲时代集团公司 | Microcomputer control system of internal combustion engine vehicle |
-
1994
- 1994-03-18 CN CN 94111681 patent/CN1108605A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302347C (en) * | 2003-06-06 | 2007-02-28 | 株洲时代集团公司 | Microcomputer control system of internal combustion engine vehicle |
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