CN2152204Y - Liquid crystal digital display mile meter for bicycle - Google Patents

Abstract

The utility model relates to a liquid crystal digital display mile meter for bicycles, comprising a signal detection device and a mile meter assembly. The infrared emission terminal, the infrared reception terminal, etc. of the signal detection device are respectively arranged on both sides of a bicycle front fork in correspondence. The mile meter assembly circuit uses a CMOS integrated circuit as a main body, and a liquid crystal display screen with relatively large characters are used to display the data. The CMOS integrated circuit and the liquid crystal display screen are connected into integration through the splicing match of a plug and a plug socket on a signal line. The mile meter assembly is arranged in the visible part of the bicycle body through a spring clamp. The utility model can automatically count the road mileage of bicycles of different sizes, and has the advantages of high counting precision, clear display, convenient assembly and disassembly, interference free from external factors and stable operation.

Description

Liquid crystal digital display mile meter for bicycle

The utility model relates to a kind of device that is used for bicycle stroke counting, and specifically a kind of liquid crystal digital shows the bicycle odometer.

Present known bicycle odometer can be divided into mechanical type (as document 2000865,2020138 etc.) and counter formula (as document 2006789,2058978 etc.) two big classes, its structure of mechanical type odometer is mechanical drive, machinery numeration (similar speedometer for automobile counting assembly principle), its principle of work majority is: adorn a cam on axle for bicycle, its cam advances to produce radially with garage back and forth beats, utilizing back and forth beats can push away the driver that is promoted by a Bowden cable, and its part of having the records of distance by the log is formed by the multi-disc gear combination.When bicycle running, cam just promotes the taximeter annular wheel by flexible axle and rotates, and then drives the digit wheel rotation.There is following defective in the mechanical type taximeter: 1, because the friction force of mechanical component is influential to bicycle speed.2, installation and debugging are extremely inconvenient.3, counting precision is low.4, numerical value shows the position of can not making zero, thereby does not have the stage function of having the records of distance by the log.5, can only fixedly be applicable to a kind of footpath bicycle of taking turns.And the every example of aforementioned calculation device formula odometer is all only designed sensing partly, be picking up partly of count signal, use and partly all use ready-made counter to be transformed the back without exception for counting, therefore, its design can't become special-purpose formal product, secondly, and on picking up signal, also divide contact and contactless, contact is damaged easily; Contactless employing tongue tube, but tongue tube work the time also belongs to mechanical switch, and deciliter momentary status shake can occur and then influence counting precision.

The purpose of this utility model will provide exactly that a kind of people of being applicable to go hiking, exercise, bicycle is had the records of distance by the log automatically when on and off duty, do not influence the bicycle original function and expand the bicycle function, beautify the bicycle outward appearance, and be convenient to install and antitheft liquid crystal digital demonstration bicycle odometer.

The purpose of this utility model is achieved in that liquid crystal digital shows that the bicycle odometer is the main body circuit structure with the Cmos integrated circuit, with the liquid crystal display material of big character demonstration, with infrared emission, be received as sensing mode.It is made up of signal supervisory instrument and odometer box body two major parts, signal supervisory instrument adopts the infrared electro converter, it is made up of infrared transmitting tube, infrared receiving tube and band three-prong plug signal wire, and infrared transmitting tube is stuck by decorating corresponding preceding (or the back) that is fixedly installed in bicycle of fixed body respectively with infrared receiving tube; Odometer circuit board and power supply then are installed in the odometer box body, its panel is provided with LCDs, power switch, the selector switch of having the records of distance by the log, its back side are equipped with elasticity folder 5, elasticity folder 5 can make the clamping of odometer box body be installed on the arbitrary visual position of car body, on the halter bar, be provided with three core sockets in the side of odometer box body, cooperate with the grafting of three core sockets by the three-prong plug on the band three-prong plug signal wire, signal supervisory instrument and odometer box body are joined together.The odometer circuit partly is made of 6 Cmos integrated circuit, 1 LCD LCDs, infrared emission, reception diode, diode, triode, resistance, electric capacity, switch, power supply, make printed circuit board (PCB) and be installed in the odometer box body, principle of work of the present utility model is as follows:

26 inches bicycle running one circles can be walked 2.01 meters, and 500 circles can be walked 1005 meters.Correspondence is installed infrared-emitting diode and infrared receiving diode on the bicycle front fork both sides, when bicycle rotates, cover Infrared during width of cloth bar process front fork, make and obtain a pulse signal on the infrared receiving diode, a circle (width of cloth bar of front-wheel is 32) is represented in per 32 pulses, counts 2.01 meters.

Power supply opening moment, R9, D9 are to IC4, and R11, C3 send the automatic clear signal to guarantee the correct of circuit initial value to IC5.The dutycycle that radiating portion is exported by the F5R3 oscillator is that the square-wave signal of 1:1 removes to drive an infrared-emitting diode after phase inverter F6 promotes, and infrared-emitting diode sends frequency and is about the infrared-ray that the 1000Hz dutycycle is 1:1.Receiving unit is by infrared receiving diode, amplifying triode and comprise that demodulator probe forms, when infrared light ray shines reception diode, through diode receive, triode amplification and detection, output high level; When width of cloth bar from front fork by the time, width of cloth bar covers infrared ray, reception diode does not have input signal, obtain a negative pulse through detection output, deliver to IC4 after this negative pulse process F4 shaping, IC4 is a slice serial counter, can be connected into the arbitrary carry system counter as required, to adapt to different vehicles.The utility model is example explanation with 26 inches cars: when rolling counters forward to 1593 pulse, judge through scale unit D3-D9, carry a pulse to IC5, represent that 26 inches cars have travelled 100 meters, this pulse is counted and is become corresponding binary-coded decimal through IC5 and exports IC1-IC3 to, demonstrates 00.1 kilometer to drive LCD.Because the LCD display requirement has symmetrical square wave, F5, R3 serve as the symmetrical square wave generator, and square wave is sent into LCD display backplane and display driver IC 1-IC3, perform display driver preliminary work.IC5 is three BCD counters, though it has only one group of binary-coded decimal output, but can form three decimal numbers by timesharing control shows, be that each has only an output constantly, because the scan round cycle is much smaller than the human eye vision residence time, so through decoding, can give stable display digit after the demonstration at output terminal.Display driver circuit IC1-IC3 at a time receives behind the reverse signal of F1 or F2, F3, the square wave of this signal and square-wave generator generation is compared, all suitable waveforms are promptly lighted corresponding field, in this example, the width of cloth bar of 26 inches bicycles counts up to 1593 interval scales and has travelled 100 meters, shows 00.1 kilometer on the LCD display for this reason.The conversion diode to IC5 counter output pulse simultaneously, also send a quenching pulse, make its zero clearing, for the next count cycle prepares to IC4, so move in circles, the automatic accumulative mileage of odometer in addition, takes out from IC4 that once to have the records of distance by the log be that 1 meter pulse signal is through R1, R2, D1 and square-wave signal effect, flash " ten " position that drives on the LCD display, the expression bicycle is travelling, and flashes the frequency height, represents that then the speed of a motor vehicle is fast.

The utility model can be to the automatic accurate counting of bicycle running kilometer of different size, counting region divides 0～99.9 kilometer, 0～999 meter two grades, owing to adopted the Cmos integrated circuit, so the utility model counting precision height, 0～999 meter shelves precision is 0.4 ‰, is 0.04% 0～99.9 kilometer shelves precision; Because adopt large-screen lc to show, so the utility model power consumptive province, character display is big and clear, can know demonstration in the sun; Owing to adopt partial installation, the odometer box body is installed on the car body by the elasticity folder, so the utility model easy accessibility, is beneficial to antitheft; Owing to adopt opto-electronic conversion mode pickoff signals, so the utility model working stability is reliable, not disturbed by extraneous factor.

Fig. 1 is a circuit diagram of the present utility model.

Fig. 2 is an odometer box body structure synoptic diagram of the present utility model.

Fig. 3 is a connection configuration installation diagram of the present utility model.

Below in conjunction with accompanying drawing embodiment of the present utility model is further set forth:

Referring to Fig. 1.

IC1～IC3 CD4056B 4 lines-seven-segment decoder

IC4 CD4040B 12 bit serial counters

Three BCD counters of IC5 CD4053B

F1-F6 CD40106B schmidt trigger 6 phase inverters

D1-D9 IN4148 diode

C1-C4 electric capacity

R1-R11 resistance

The S1-S2 switch

The LCD LCDs

The V1-V2 transistor

D10-D11 infrared emission, reception diode

The GB dry cell

Referring to Fig. 2, Fig. 3, Fig. 4.

LCDs 1, three core sockets 2, power switch 3, the selector switch of having the records of distance by the log 4, elasticity folder 5, infrared-emitting diode are decorated fixed body 6, infrared receiving diode is decorated fixed body 7, band three-prong plug signal wire 8, odometer box body 9.

The utility model is embodiment with 26 inches bicycles:

With the corresponding respectively both sides that are installed in bicycle front fork 3/4 width of cloth bar place of two decoration fixed bodies 6,7 that infrared-emitting diode D10, infrared receiving diode D11 be housed respectively, emission receives between two pipes at a distance of about 5cm, and does not have other shelter except that width of cloth bar.When bicycle rotates, every width of cloth bar blocks once, circuit send a pulse to IC4, when IC4 count down to 1593 pulses (representing 26 inches cars to travel 100 meters), it send carry pulse on to IC5, IC5 increases a unit on former counting basis, and then show by display circuit, represent bicycle to travel 100 meters again, in addition, the count pulse that number expression of "+" of display screen high order end is 1 meter, every sudden strain of a muscle is once represented to have travelled 1 meter, flash p.s. and then represent that the speed of a motor vehicle is 5 meter per seconds=18 kilometer/hour for 5 times, travelling so the expression car is flashed in "+", and flashing the speed that speed is represented the speed of a motor vehicle.It is single carry with 100 meters that S2 is placed on left end, and it is 99.9 kilometers that maximum demonstration is had the records of distance by the log, and it is single carry with 1 meter that S2 is placed on right-hand member, and it is 999 meters that maximum demonstration is had the records of distance by the log, and measuring error is 0.4 ‰.

The explanation of count pulse carry.

26 inches bicycle front-wheels have 32 width of cloth bars, turn around and can walk 2.01 meters, and every width of cloth stripe pitch is 0.0628 meter as can be known, when the inswept infrared emission reception diode of width of cloth bar 1593 times, nearly 50 circles of wheel this moment, 1593 * 0.0628=100.04(rice), promptly draw hundred error of meter 0.04%.The every inswept transmit-receive tube of width of cloth bar once just blocks receiving tube once, and IC4 just can obtain a pulse.(other bicycle mileage of taking turns the footpath converts also in like manner) is converted into binary number with 1593: " 11000111001 ".Get position, its " 1 " and be connected into NAND gate circuit, can realize " hundred meters one carry " of IC4 to IC5.In like manner, other takes turns the footpath bicycle as long as the diode NAND gate circuit is connect the exchange that IC4 corresponding " 1 " end can conveniently be realized this odometer.

Claims (3)

1, a kind of liquid crystal digital shows the bicycle odometer, form by signal supervisory instrument and odometer box body two large divisions, it is characterized in that signal supervisory instrument is the infrared electro converter, it is by infrared-emitting diode, infrared receiving diode and band three-prong plug signal wire are formed, and infrared-emitting diode is stuck by decorating corresponding preceding (or the back) that is fixedly installed in bicycle of fixed body respectively with infrared receiving diode; Circuit board and power supply are installed in the odometer box body, and its panel is provided with LCDs, power switch, the selector switch of having the records of distance by the log, and its back side is equipped with elasticity folder, is provided with three core sockets in the side of odometer box body; Cooperate with the grafting of three stamen sockets by three stamen plugs on the band three-prong plug signal wire, signal supervisory instrument and odometer box body are joined together.

2, liquid crystal digital according to claim 1 shows the bicycle odometer, it is characterized in that the odometer circuit by the Cmos integrated circuit, elements such as LCD LCDs, infrared emission, reception diode, diode, triode, resistance, electric capacity, switch, power supply connect and compose by lead.

3, liquid crystal digital according to claim 1 and 2 shows the bicycle odometer, it is characterized in that the odometer circuit by 4 lines, one seven-segment decoder IC1～IC3,12 bit serial counter IC4, three BCD counter IC5, schmidt trigger 6 phase inverter F1～F6, diode D1～D6, infrared emission, reception diode D10, D11, capacitor C 1～C4, resistance R 1～R11, switch S 1, S2, LCD LCDs, transistor V1, V2, power supply GB connect and compose by lead.

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