CN2148943Y - Electron timing instrument for measuring speed & distance of vehicles - Google Patents
Electron timing instrument for measuring speed & distance of vehicles Download PDFInfo
- Publication number
- CN2148943Y CN2148943Y CN 93203530 CN93203530U CN2148943Y CN 2148943 Y CN2148943 Y CN 2148943Y CN 93203530 CN93203530 CN 93203530 CN 93203530 U CN93203530 U CN 93203530U CN 2148943 Y CN2148943 Y CN 2148943Y
- Authority
- CN
- China
- Prior art keywords
- speed
- vehicle
- mileage
- chip microcomputer
- mileometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Distances Traversed On The Ground (AREA)
Abstract
The utility model relates to a vehicle speed measurer, which is designed for simplifying structure, increasing cost-performance ratio and satisfying the requirement of popularization. A sensor comprising a permanent magnetic sheet and a hysteresis switch makes the movement of a vehicle changed into electrical signals, and a device comprising an SCM, a liquid crystal display panel, a keyboard and a wheel circumference setting circuit calculates and displays speed, time and mileage under the control of a software. The utility model can also store all the data of the vehicle arriving at a specific moment and a mileage point according to the requirement of a user for enquiry. The specific moment and the mileage point can be preset. The vehicle speed measurer has the advantages of small volume, low power consumption, high precision, and convenient installation, being suitable for various vehicle models.
Description
The utility model relates to a kind of velocity measuring device, relates to a kind of vehicle speed measurement device that pulse signal is provided by rotation magnetic spare or rather.
Along with the progressively raising of living standards of the people, the use of novel high-grade bike, motorcycle etc. is universal day by day, such vehicle test the speed and mileage metering also becomes people's reality needs.
Existing car speed, mileage measurement mechanism, the general non-contact speed measurement mode that adopts, form by two parts functional part, comprise that the motion state signal with vehicle converts the sensing element of electric signal and speed, mileage calculating, the display unit of vehicle to, sensing element adopts photoelectric sensor that is made of luminescent device and photosensitive device thereof or the magnetoelectric transducer that is made of magnetic field generation part and magneto sensor thereof, wheel whenever circles, pulse of sensor output, the speed of vehicle, mileage calculate, display unit, can adopt the multiple technologies scheme to implement.
A kind of speed per hour meter that only can show the real-time speed of a motor vehicle is arranged, adopt counter output step-by-step counting to sensor in the fixing △ t sampling time, according to the girth of wheel and in △ t, count pulse number, calculate the forward travel distance △ S of vehicle in the △ t time, again by △ S, △ t computing velocity △ V.This scheme will be aligned △ t for the wheel of different girths when implementing, by external meters adjustment and calculating △ t, operate very inconvenient.If calculate mileage again, also to increase many parts.
Also have a kind of car speed mileometer, comprise microprocessor, memory, driver, display etc., because of pursuit high resolving power and complete function, thereby complex structure, the cost height can not satisfy popular requirement.
The purpose of this utility model is a kind of vehicle timing simple in structure, cheap, that superior performance price ratio is arranged of design mileometer that tests the speed.Except that showing the speed of a motor vehicle, time, mileage at any time, also has digital store function, can be according to user's requirement, automatically preserve the total data of vehicle when reaching particular moment, mileage points, inquiry for future reference is used, the specific moment, mileage points can be set in advance by the user, use for adapting to various vehicles simultaneously, also the wheel circumference parameter should be able to be set easily.
The vehicle electric timing of the present utility model mileometer that tests the speed, speed, the mileage that includes the magnetoelectric transducer be made up of magnetic field generation device and magneto sensor and vehicle calculates, display unit, it is characterized in that: the speed of described vehicle, mileage calculate, display unit by single-chip microcomputer, keyboard, wheel circumference circuit is set and LCDs is formed, the two-way I/O end of described single-chip microcomputer is connected with LCDs with keyboard, and the middle broken ends of fractured bone of described single-chip microcomputer connects described magneto sensor respectively and described wheel circumference is provided with circuit.
Single-chip microcomputer multiply by the wheel circumference value again by to the i.e. counting of the broken ends of fractured bone wherein of sensor output, obtains the mileage value, and with the mistiming computing velocity value of twice interruption, the time is then finished by the single-chip microcomputer internal clocking, and the RAM of single-chip microcomputer inside is as data-storing.
Describe technology of the present utility model in detail below in conjunction with embodiment and accompanying drawing thereof.
Accompanying drawing 1 is embodiment magnetoelectric transducer structure and scheme of installation.
Accompanying drawing 2 is the embodiment vehicle electric timing mileage surface plate structural representation that tests the speed.
Accompanying drawing 3 is for being equipped with the test the speed bicycle synoptic diagram of mileometer of electric time-keeping.
Accompanying drawing 4 is that the embodiment speed of a motor vehicle, mileage calculate, the display circuit schematic diagram.
Accompanying drawing 5 is the vehicle electric timing mileometer software main flow block diagram that tests the speed.
Referring to accompanying drawing 1, magnetoelectric transducer is formed by the permanent magnet 11 that produces magnetic field with as the magnetic hysteresis switch 12 of magneto sensor, and permanent magnet 11 is magnetic sheets among the embodiment, is fixed in the magnetic sheet geometrical clamp 111, and the model of embodiment magnetic hysteresis switch 12 is TL170C.121 is socket among the figure, and 122 is geometrical clamp.During installation, permanent magnetic sheet 11 should be less than 3mm with the spacing of magnetic hysteresis switch 12.
Referring to accompanying drawing 2, the test the speed panel of mileometer of vehicle electric timing is provided with LCDs 13, four control button K1-K4 and a power switch KP.LCDs is used for demonstration time, speed and mileage, and operating key contains time, mileage, speed, four kinds of key justice are set, and single or two combination operations show to carry out function corresponding, to control to switch.
Present embodiment is selected: start-press simultaneously key and speed key are set, this table is started working from zero-time, zero distance; Show current speed per hour-, change real-time display speed with the speed of a motor vehicle by the speed key; Show current mileage-, show the mileage that begins to travel from startup by the mileage key; Show the current time-press time key, demonstration begins time to current driving from startup; Current state stores-in the vehicle ' process by key is set, preserves current speed, mileage and time data, embodiment can preserve eight groups of up-to-date status datas altogether, status data demonstration simultaneously is static; State-data queries-at above-mentioned status data shows presses time key, mileage key and speed key respectively when static, but the speed of the mileage of the time point of sequential query storage, storage point and storage point; Default automatic storage state point-press simultaneously is provided with key and time key for the time state point is set, and is to increase progressively the time by the mileage key at this moment, is that mileage successively decreases during by the speed key, withdraws from setting during again by time key.Press simultaneously and key and mileage key are set for the mileage state point is set, during at this moment by the mileage key is that mileage increases progressively, be that mileage successively decreases during by the speed key, withdraw from timing being set testing the speed mileometer during again by time key, store total data automatically travelling when reaching above-mentioned state point.
Referring to accompanying drawing 3, the magnetic sheet geometrical clamp 111 of permanent magnetic sheet 11 shown in Figure 1 is installed between two vertically hung scrolls of bicycle front-wheel, the geometrical clamp 122 that magnetic hysteresis switch 12 and socket 121 are housed is installed on the bicycle front fork, one week of wheel, during permanent magnetic sheet process magnetic hysteresis switch 12 surfaces, sense magnetic field, send negative pulse and send the electric time-keeping mileometer 10 that tests the speed through lead 14.The electric time-keeping mileometer 10 that tests the speed is installed on the handle-bar, and controlled amount is in the range of size of 65 * 45 * 30mm.
Referring to accompanying drawing 4, embodiment U1 is a CMOS chip single-chip microcomputer, and model is 80C51.U2 is a LCDs, desirable 3 1/2 or 4, and as LCD4320.
Single-chip microcomputer U1 interrupts INT1(P3.3 by it) termination receives the undersuing of magnetic hysteresis switch 12 outputs, by P3.0, P3.1, P3.6, P3.7 2 * 2 operating key K1-K4 made key scanning.The U1 circuit is an electrification reset, produces clock by the 6MHz crystal, and its two-way I/O end P0, P1, P2 and P3.4, P3.5 are all as the display drive logic that produces liquid crystal display.Another interrupt INT 0(P3.2 of U1) the termination wheel circumference is provided with circuit, as wheel circumference value, i.e. girth set-point JN are set.Read in by P1.0-P1.7, P2.2-P2.4 end, 11 can be provided with 2048 perimeter value altogether.At P1.0-P1.7, be connected diode D1-D11 respectively between P2.2-P2.4 and girth set-point JN, form girth circuit is set, diode cathode is attempted by the JN end, when specifically being provided with corresponding jumper connection point with the unidirectional short circuit of diode, reading in is 0, unsettledly then reads in 1.
U1 multiply by perimeter value by to the INT1 counting, obtains the mileage value, the mistiming of interrupting with twice INT1 calculates velocity amplitude, software scans, discerns the action of each operating key, and control is switched and shown, shown in accompanying drawing 5 main flow block diagrams, the power consumption of entire circuit is about 25mW.
In the accompanying drawing 5, when being judged as " 1 ", then calculate the calculation control position of CALB for being provided with, and the demonstration position of LCDB for being provided with when being judged as " 0 ", then shows.Branched program is for carrying out the working routine of respective keys operation among the figure.
The electric time-keeping of the present utility model mileometer that tests the speed, used element is few, cost is low, but function is strong, and the resolution of time, mileage, speed is respectively 0.1 second, 0.1 kilometer and 0.1 kilometer/hour, can satisfy the requirement of the utility model purpose fully.
The utility model is except that can using on bicycle, motorcycle, and the time, speed and the mileage that also can be used for other vehicles calculate.
Claims (4)
1, a kind of vehicle electric timing mileometer that tests the speed, speed, the mileage that includes the magnetoelectric transducer be made up of magnetic field generation device and magneto sensor and vehicle calculates, display unit, it is characterized in that: the speed of described vehicle, mileage calculate, display unit by single-chip microcomputer, keyboard, wheel circumference circuit is set and LCDs is formed, the two-way I/O end of described single-chip microcomputer is connected with LCDs with keyboard, and the middle broken ends of fractured bone of described single-chip microcomputer connects described magneto sensor respectively and described wheel circumference is provided with circuit.
2, the vehicle electric timing according to claim 1 mileometer that tests the speed is characterized in that described magnetic field generation device is permanent magnetic sheet, and described magneto sensor is the magnetic hysteresis switch.
3, the vehicle electric timing according to claim 1 mileometer that tests the speed, it is characterized in that it is one group of diode circuit that described girth is provided with circuit, the diode anode is connected with the two-way I/O end of single-chip microcomputer respectively, and the diode negative terminal is connected with the middle broken ends of fractured bone of single-chip microcomputer.
4, the vehicle electric timing according to claim 1 mileometer that tests the speed is characterized in that described keyboard is 2 * 2 keyboards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93203530 CN2148943Y (en) | 1993-02-18 | 1993-02-18 | Electron timing instrument for measuring speed & distance of vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93203530 CN2148943Y (en) | 1993-02-18 | 1993-02-18 | Electron timing instrument for measuring speed & distance of vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2148943Y true CN2148943Y (en) | 1993-12-08 |
Family
ID=33787381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93203530 Expired - Fee Related CN2148943Y (en) | 1993-02-18 | 1993-02-18 | Electron timing instrument for measuring speed & distance of vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2148943Y (en) |
-
1993
- 1993-02-18 CN CN 93203530 patent/CN2148943Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |