CN2032723U - Digital locomotive autometer - Google Patents
Digital locomotive autometer Download PDFInfo
- Publication number
- CN2032723U CN2032723U CN 88206453 CN88206453U CN2032723U CN 2032723 U CN2032723 U CN 2032723U CN 88206453 CN88206453 CN 88206453 CN 88206453 U CN88206453 U CN 88206453U CN 2032723 U CN2032723 U CN 2032723U
- Authority
- CN
- China
- Prior art keywords
- digital
- locomotive
- speed
- autometer
- disc
- 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 - Lifetime
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- Measurement Of Distances Traversed On The Ground (AREA)
Abstract
The utility model relates to a digital locomotive autometer which is composed an 8039 single-chip computer and a digital locomotive speed measuring and distance measuring sensor. The running speed of a locomotive is displayed by a four-bit semiconductor digital-code tube. The display resolution can reach 0.1Km/h, and the display range is 0-255Km/h.
Description
A kind of digital locomotive speedmeter is specially adapted on the train locomotive, reflects the travelling speed of train to the driver with it.At present the locomotive speedmeter that uses be with a miniature threephase alternator as speed pickup, it is installed on the front axle of locomotive, the voltage of its output changes along with train running speed.Through after the three-phase bridge rectification, the resistance of connecting send electricity to velometer (reometer), represents velocity amplitude with the size of electric current.Owing to power to velometer by diode rectification, and diode is a nonlinear element that its resistance has difference with the height of voltage, locomotive running speed is lower, the error of velometer is big more, and locomotive is when slow running, and the velocity amplitude of indication is inaccurate.When voltage was lower than 1.4 volts, diode ended, and speed is designated as zero, and locomotive is also in operation.Existing rotor sensor is a permanent magnet, and magnetic weakens gradually in the use, and the error of velometer is increased.Therefore, a lot of train operators are reflected existing inaccurate with locomotive speedmeter.
The purpose of this utility model provides a kind of measuring accuracy and irrelevant locomotive speedmeter that has error hardly of train running speed that uses digital transducer.
The utility model is achieved in that and uses 8039 one-chip computers and the digital locomotive distance measuring sensor that tests the speed to form velocity-measuring system, and the travelling speed of train is shown by 4 semiconductors.The resolution that shows can be accomplished 0.1Km/h.The display speed scope is 0～255Km/h.The numeral clear display need not throw light on.
Below in conjunction with description of drawings principle of work of the present utility model, Fig. 1 is the structure principle chart of sensor, and Fig. 2 is the basic circuit diagram of digital locomotive speedmeter.The code-disc 2 of sensor 1 uses lighttight hard plate material to make, and leaves evenly distributed window 17 above so that light passes through.When wheel, driving code-disc 2 by axle 3 rotates, the light that is sent by light source 4 is cut into interrupted light signal by code-disc 2 and is mapped on the photoreceptor 5, the shift transformation that is about to wheel becomes pulse digital signal, passes through photoelectric commutator 6(TIL-113 again) deliver to counter 7(4024 chip) count.When train speed when 3.5Km/h is above, full 16 pulses of counter 7 are then by its Q
5End is to the INT of one-chip computer 8 (8039) end output look-at-me, and computing machine 8 calculates the travelling speed and the distance of train according to the diameter of internal clocking and wheel, and the single-wheel diameter can be determined by wheel footpath switch 12.When train speed at 3.5Km/h and when following, low 4 bit digital of counter 7 are read in computing machine 8 inquiries, calculate train running speed and distance.Computing machine 8 every responses or read the signal of start-stop counter 7 or read one time 7 signal or data after, be about to counter 7 and be reset to zero, make its counting again again.
Bright for clear display, data presented adopts and latchs mode, promptly uses 4 display decoder 9(4511 chips) latch data, and drive 4 charactrons, 10 display speed values (or mileage value).
Memory under program 11(2716 chip) is used for storing computer software.74LS244 chip 13 is for bus input data usefulness, and 14 of 74LS373 chips are to use to memory under program 11 addressings.P in the computing machine
14, P
15, P
16Delivery outlet is by other equipment in the photoelectrical coupler 15 may command locomotives, as automatic stopping device 16 etc.
Claims (3)
1, a kind of velometer that is contained on the train locomotive, be applicable to measuring machine vehicle speed and distance travelled, it is characterized in that: adopted path, formation Digital Speed Testing distance measuring sensor and a computer system of forming with single-chip microcomputer that light signal was opened and interdicted to rotating code-disc.
2, digital locomotive speedmeter according to claim 1 is characterized in that sensor is made up of code-disc, axle, light source and photoreceptor.
3, digital locomotive speedmeter according to claim 1 is characterized in that its computer system is the chip by the display decoder of single-chip microcomputer and latch data, forms counting calculating, digital display system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88206453 CN2032723U (en) | 1988-06-06 | 1988-06-06 | Digital locomotive autometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88206453 CN2032723U (en) | 1988-06-06 | 1988-06-06 | Digital locomotive autometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2032723U true CN2032723U (en) | 1989-02-15 |
Family
ID=4840641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88206453 Expired - Lifetime CN2032723U (en) | 1988-06-06 | 1988-06-06 | Digital locomotive autometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2032723U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768289A (en) * | 2012-07-02 | 2012-11-07 | 江汉大学 | Photoelectric speed measuring and counting device |
| CN103171598A (en) * | 2013-04-12 | 2013-06-26 | 莱芜钢铁集团有限公司 | Method and system for positioning train |
| CN104566286A (en) * | 2014-09-25 | 2015-04-29 | 黄林军 | Switching device and luminous rod using switching device |
| CN107200043A (en) * | 2017-05-16 | 2017-09-26 | 同济大学 | Rolling stock traffic direction recognizes the device and method measured with axle speed |
-
1988
- 1988-06-06 CN CN 88206453 patent/CN2032723U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768289A (en) * | 2012-07-02 | 2012-11-07 | 江汉大学 | Photoelectric speed measuring and counting device |
| CN103171598A (en) * | 2013-04-12 | 2013-06-26 | 莱芜钢铁集团有限公司 | Method and system for positioning train |
| CN103171598B (en) * | 2013-04-12 | 2017-02-15 | 莱芜钢铁集团有限公司 | Method and system for positioning train |
| CN104566286A (en) * | 2014-09-25 | 2015-04-29 | 黄林军 | Switching device and luminous rod using switching device |
| CN104566286B (en) * | 2014-09-25 | 2018-09-07 | 黄林军 | A kind of switching device and the lighting rod using the switching device |
| CN107200043A (en) * | 2017-05-16 | 2017-09-26 | 同济大学 | Rolling stock traffic direction recognizes the device and method measured with axle speed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |