CN201173932Y

CN201173932Y - Electric locomotive LCD Chinese display velocimeter

Info

Publication number: CN201173932Y
Application number: CNU2008200698456U
Authority: CN
Inventors: 丁少华
Original assignee: Yongcheng Coal and Electricity Holding Group Co Ltd
Current assignee: Yongcheng Coal and Electricity Holding Group Co Ltd
Priority date: 2008-03-24
Filing date: 2008-03-24
Publication date: 2008-12-31
Anticipated expiration: 2018-03-24

Abstract

The utility model provides a liquid crystal Chinese character displaying velometer. The velometer consists of a Hall element arranged on a vehicle frame of an electric vehicle, magnet steel arranged on wheels and a control system; the key technique is as follows: the control system takes a single chip machine as a control core; the single chip machine has a clock wire and a data wire connected with a LCD; in order to adapt to different vehicles and facilitate the adjustment, the single chip machine is also connected with a dial switch. The liquid crystal Chinese character displaying velometer of the utility model uses the Chinese character displaying LCD to display the running speed as well as the mileage and warning information, etc., which is big in information content and more humanized and visualized; the liquid crystal Chinese character displaying velometer is provided with the dial switch, and speed parameters corresponding to the type of the electric vehicle can be set on the spot, so that the adaptive capacity is strong; moreover, the velometer also has the advantages of full functions, strong adaptive capacity, reliable operation, accurate measurement, direct-viewing display, novelty, simple assembly and convenient adjustment, etc.

Description

Electric locomotive liquid crystal Chinese display knotmeter

One, technical field

The utility model relates to a kind of device that various vehicles such as mine, building site, enterprise have velocity survey, mileage demonstration, overspeed alarming function that is used for.

Two, background technology

Because the mine belongs to high risk industries, and the mine is aboveground, track transport distance, complicated condition, bend and the track switch of down-hole are many, electric locomotive is many etc., proposed challenge with management for safety, use efficiently.Electric locomotive speed is too high not to meet the regulation that is no more than 4m/s in " safety regulations in coal mine ", have many potential safety hazards, speed is crossed to hang down then influences mine production, can't give full play to the potentiality of equipment, cause the wasting of resources, therefore one travel speed is most important safely and efficiently.The mine is existing does not all have speed display device with electric locomotive, and what the electric locomotive driver can only rely on the individual feels to carry out speed control, has not only brought great potential safety hazard, and operation, maintenance efficiency are low, can not satisfy the requirement of highly efficient and productive modernized mine.There is enterprise to invent a kind of electric locomotive knotmeter recently, adopt Hall element to cooperate the picking rate signal with magnet steel, though use the speed measuring device adaptive faculty of Hall element stronger, but the digital speed instrument that uses in control system does not possess the ability according to field condition speed governing degree coefficient, special train special use, versatility are poor, use charactron to show not enough hommization, the display message amount is little, is unfavorable for follow-up function development.

Three, summary of the invention

The technical problems to be solved in the utility model is: design a kind of electric locomotive liquid crystal Chinese display knotmeter, speed is detected show more human nature, more directly perceived, and be applicable to that the locomotive of various models uses, to overcome the deficiencies in the prior art.

Solving the technical scheme that the utility model technical matters taked is: by be installed in the Hall element on the electric locomotive vehicle frame, magnet steel and the control system on the wheel formed, its gordian technique is that control system is the control core with the single-chip microcomputer, connects a LCD on the clock line of single-chip microcomputer, data line.For adapting to different automobile types and convenient the adjustment, on single-chip microcomputer, also be connected with a toggle switch.

Good effect of the present utility model is: use the Chinese display liquid crystal display to show, show that not only travel speed also can show distance travelled and warning message etc., the display message amount is big, and human nature, directly perceived more; Have toggle switch in the device, can be according to the electric locomotive model, the on-the-spot velocity coefficient of setting correspondence, adaptive faculty is strong.Advantages such as that this knotmeter has is multiple functional, adaptive faculty is strong, reliable, accurate measurement, intuitive display, novelty, installation is simple, debugging is convenient.

Four, description of drawings

Accompanying drawing is an electrical schematic diagram of the present utility model.

Five, embodiment

Electric principle of the present utility model adopts AT89C2051 type single-chip microcomputer (totally 20 pins) to be the control core as shown in drawings in the ultimate system of single-chip microcomputer 1, the 20# pin of single-chip microcomputer 1 is the 5V power input, and the 10# pin is ground.4#, the external crystal oscillator Y1 of 5# pin and capacitor C 2, C3 provide time clock to single-chip microcomputer, guarantee can normally moving of single-chip microcomputer 1.15#, 14# pin respectively by resistance R 14, R15 and light emitting diode D8, D9 and+the 5V power supply links to each other, realizes the control to light emitting diode, is used to refer to duty (glimmering during work) and (being lighted during overspeed alarming) indicated in warning.

1, power circuit 6:

Liquid crystal Chinese display knotmeter adopts 24V DC power supply (input current 0.17A, system insulate to metal shell).The 24V direct supply is considered the low-and high-frequency undesired signal that seals in except that from power supply, the normal operation of protection system through 0.2A protective tube, choking coil T1, diode D1 (preventing that power supply from connecing instead), reactance T2 and capacitor C 6, C7, C8.After through three-terminal voltage-stabilizing 7818 (or 317), 7812,7805 and capacitor C 9, C10, C11, C12, diode D2, D3, D4, D5, D6, D7, combinations such as stabilivolt V1, V2 carry out multistage voltage stabilizing, step-down, for hall probe, J1 relay provide 12V operating voltage, for LCD panel, single-chip microcomputer, storer etc. provide 5V operating voltage.

2, the input circuit 4:

Input is to be cooperated with magnet steel on the wheel by rack-mounted hall probe, realizes the detection to wheel.Magnet steel on wheel and hall probe axis coinciding are point-blank the time, hall probe is just exported a pulse signal, be input to the 7# pin of single-chip microcomputer behind pulse signal process resistance R 5, R6, the photoelectricity isolation U3b, make single-chip microcomputer 1 enter the outer 1 processing subroutine of interrupting, start timer internal, carry out timing, and the recording impulse number, realize testing the speed and mileage.

3, mileage storage circuit 3:

Adopt EEPROM class ferroelectric memory such as 24C * *, chip such as X25045, by two pull-up resistors of 2#, 3# pin and R3, R4 of single-chip microcomputer 1 realize with 24C * * I of sections electricity storage ²The C bus communication is realized writing and reading of mileage, finishes the memory function of mileage.I ²The pull-up resistor of C bus can reduce interference, guarantees the reliability service of communication.

4, the detection of power loss circuit 5:

Before power-supply system protection diode D1, drawn a voltage signal; enter behind the photoelectricity isolating diode U3a through 20V stabilivolt V3 ground connection by current-limiting resistance R8; during operate as normal since input voltage 24V greater than 20V; the stabilivolt conducting; photoelectricity is isolated the U3a operation; single-chip microcomputer 6# pin is a high level, and single-chip microcomputer normally moves.When supply voltage is lower than 20V, the V3 stabilivolt just recovers to end, U3a photoelectricity is isolated the output that quits work and is recovered to end, the 6# pin becomes electronegative potential under the effect of pull down resistor R9, single-chip microcomputer enters outside 0 Interrupt Process subroutine, to wait for outer 0 recovery of interrupting behind the mileage parameter write store after upgrading, single-chip microcomputer resets after the recovery.

5, the overspeed alarming circuit 7:

When single-chip microcomputer 1 detected the electric locomotive travelling speed above regulation, by electronegative potential of 13# pin output, U 3c photoelectricity isolation work was by resistance R 17, R18, pilot relay J1 work after triode B1 amplifies, by no source contact output alarm signal.The pull-in winding of J1 relay also has anti-phase diode D10, capacitor C 4 etc., on the output contact and by capacitor C 5, to realize eliminating interference from the source, realizes the reliability service of controller.

6, LCD 8:

17#, 16# pin (clock line, data line) by single-chip microcomputer 1 link to each other with the LCD 8 of 4 row * 8 words by R12, R13, and single-chip microcomputer 1 is realized the Presentation Function of Chinese character, letter, numeral etc. by serial communication control liquid crystal board.

7, the circuit 2 that resets:

Reset circuit 2 is made up of capacitor C 1, resistance R 1, R2 reset button K1, power supply charges to electric capacity when powering on, electric capacity is equivalent to conducting, single-chip microcomputer 1# pin is a noble potential, electric capacity charging finish the back recover by, under the effect of pull down resistor R2, the 1# pin recovers electronegative potential, single-chip microcomputer withdraws from and resets, and realizes the electrification reset function to single-chip microcomputer.Capacitor C 1 is by the R1 short circuit, because R1 resistance is very little and much smaller than R2, so the 1# pin of single-chip microcomputer 1 is a noble potential, single-chip microcomputer 1 enters and resets when pressing the K1 button.Capacitor C 1 is by R1, K1 discharge, after unclamping, button is equivalent to conducting in the electric capacity charging process, the 1# pin of single-chip microcomputer 1 still is a noble potential, electric capacity charging finish the back recover by, under the effect of pull down resistor R2, the 1# pin recovers electronegative potential, and single-chip microcomputer 1 withdraws from and resets, and realizes the button reset function of single-chip microcomputer 1.

8, the toggle switch circuit 9:

Toggle switch is two switches, be connected 18,19 pin of single-chip microcomputer 1, two of R10, R11 resistance are arranged at the bottom, four kinds of cooperation positions by two toggle switchs, four kinds of corresponding vehicles are set, be respectively 14T, 10T (the 8T wheel diameter is the same), vehicles (also can according to circumstances adjust in advance) such as 5T, 2.5T, be convenient to on-the-spot the adjustment.

Claims

1, a kind of electric locomotive liquid crystal Chinese display knotmeter, by be installed in the Hall element on the electric locomotive vehicle frame, magnet steel and the control system on the wheel formed, it is characterized in that: control system serves as the control core with single-chip microcomputer (1), by a control line connection LCD (8) of single-chip microcomputer (1).

2, electric locomotive liquid crystal Chinese display knotmeter according to claim 1 is characterized in that: be connected with a toggle switch circuit (9) on single-chip microcomputer (1).