CN1152349C

CN1152349C - Failure analyzer for taximeter

Info

Publication number: CN1152349C
Application number: CNB011380780A
Authority: CN
Inventors: 陈鸿俊; 于世平; 殷琍娜
Original assignee: NANJING METERING TEST INST
Current assignee: NANJING METERING TEST INST
Priority date: 2001-12-31
Filing date: 2001-12-31
Publication date: 2004-06-02
Anticipated expiration: 2021-12-31
Also published as: CN1356672A

Abstract

The present invention relates to a fault analyzer for fare meters, which is composed of a CPU. The information of a built-in motor or a manual rotating disk is processed by the CPU and is displayed by a main screen, an auxiliary screen and a K value display screen after isolated and shaped by a synchronous pulse signal output by a sensor. Thus, the information is compared with the display data of a tested fare meter which acts synchronously so as to judge a fault point. The present invention has the advantages of compact structure, convenient use and accurate judgment to fault points. The defects of a traditional test of a complete vehicle on a testing platform are overcome and a self test can be carried out by the manual rotating disk.

Description

Failure analyzer for taximeter

Technical field

The present invention relates to a kind of testing tool, especially a kind ofly be used for vehicle-mounted failure analyzer for taximeter.

Background technology

Vehicle-mounted fee register is a kind of appointment measurement instrument that generally uses in the taxi, accurately whether it, directly have influence on driver and crew's economic interests, because vehicle-mounted fee register frequency of utilization is high, some practical problemss that exist on the fee register inherent quality in addition, cause that the probability that fee register breaks down is also very high, the dispute between the driver and crew that cause owing to the fault of vehicle-mounted fee register happens occasionally.Therefore, carry out regular or irregular detection, classified as among various places taxi passenger transportation management department and the measuring control department working contents for vehicle-mounted fee register.

At present, fee register detection mode commonly used mainly is: taxi is placed on the test board, pass through drive unit, whether simulated automotive speed per hour 60KM/H makes car load carry out the original place sky on test board and sails, and consistent according to data presented on the operating range that shows on the test board and the tested fee register, if all data are in allowed band, then tested fee register is qualified, otherwise, be judged to be defective.This detection mode, promptly uneconomical, inconvenient again, can not analyze and cause the fee register underproof possible breakdown point of having the records of distance by the log.

Summary of the invention

The objective of the invention is to:, provide a kind of new fee register faults analysis instrument that is used to judge at the present vehicle-mounted fee register practical problems that detection system exists of having the records of distance by the log.

The object of the present invention is achieved like this: a kind of failure analyzer for taximeter, comprise CPU, it is characterized in that: mechanical driving device is provided with the sensor interface with interface, first sensor interface, second sensor interface and tested fee register (1) configuration of motor (2) or manual turntable (3), the input end of built-in first sensor (4) joins the INT of output terminal and CPU (9) by mechanical driving device and built-in motor (2) or manual turntable (3) ₁Pin connects, and CPU (9) joins with ROM (read-only memory) (10) and read-write memory (11), and CPU (9) is connected with K value display screen (15) by display circuit (12) and analytic accounting Cheng Ping (13), the pair screen (14) of having the records of distance by the log by display interface.

The invention has the advantages that: before use, can carry out self check to the complete machine duty of fault analysis instrument by manual turntable (3), determine that it is in shape, and can select different test points, be used for concrete failure judgement position, in addition, this analyser compact conformation, easy to use, the drawback of having avoided the traditional detection mode to exist effectively.

Description of drawings

Fig. 1 is a system chart of the present invention;

Fig. 2 is that the embodiment of the invention relates to the CPU fundamental diagram;

Fig. 3 is the isolation shaping schematic diagram that the embodiment of the invention relates to;

Fig. 4 is the display circuit schematic diagram that the embodiment of the invention relates to.

Among the figure: 1, tested fee register, 2, motor, 3, manual turntable, 4, first sensor, 5, second sensor, 8, photoelectricity isolates change-over circuit, 9, CPU, 10, read-only memory, 11, reading writing memory, 12, display circuit, 13, analytic accounting Cheng Ping, 14, the pair screen of having the records of distance by the log, 15, K value display screen.

Embodiment

Below, in conjunction with the accompanying drawings the embodiment of the invention is further described.

The present invention is with built-in motor 2 and manual turntable 3 information that rotates as seen from Figure 1, become synchronous pulse information through built-in first sensor 4, synchronous pulse information is sent into central processor CPU 9 after can isolating change-over circuit 8 shapings by photoelectricity, relevant procedures and data that CPU9 provides according to read-only memory 10 and reading writing memory 11, carry out data processing, and deliver to display circuit 12, relevant information will be at analytic accounting Cheng Ping 13, pair have the records of distance by the log the screen 14 and K value display screen 15 on the demonstration, before this system works, can be according to the K value of tested fee register 1, the button that resets/be shifted by K value initialization circuit is revised the K Value Data in the reading writing memory 11 with+1 button, the K value can't be changed locked in testing process.In the detection, the interface that the sensor of tested fee register 1 configuration and mechanical driving device are reserved joins; Perhaps join by built-in second sensor, 5 direct pulse input ports with tested fee register 1.

As seen from Figure 2, the present invention in the specific implementation, what CPU9 selected is the 80C31 chip, and what read-only memory 10 was selected is the 27C512 chip, 6264 chips in reading writing memory 11 selections, what display circuit 12 was selected is 8255 chips, what photoelectricity was isolated change-over circuit 8 selections is two TIL117 chips, and wherein, a TIL117 realizes photoelectricity isolation conversion, its signal is from the pulse signal of built-in first sensor 4, and it outputs to the INT of 80C31 chip ₁Pin, another piece TIL117 chip is taken from the information of sky/loaded vehicle switch, and delivers to the T of 80C31 chip ₁Pin, T ₁Pin is the common I/O mouth of CPU; Reset/be shifted button and+1 button received P1.2 and the P1.1 pin of 80C31 respectively, is used for the setting of K value, and in addition, CPU also is provided with holding circuit and electronics house dog, and its holding circuit is selected the MAX818 chip for use.

Isolate shaping as seen from Figure 3 and be sending into the TIL117 chip through the RC twitter circuit that disappears from the pulse signal of first sensor 4, after send into the INT of CPU through reverse drive chip 74HC00 ₁Pin, another road are the information to sky/loaded vehicle switch, send into the TIL117 chip through the RC twitter circuit that disappears, and deliver to the T of CPU again ₁Pin.

As seen from Figure 4, what digital display circuit 12 was selected is 8255 chips, its shows signal comes from the display interface of cpu data bus, output signal is by three ULN2003 chips, through independently digital pipeline section (position) driving circuit separately, drive corresponding analytic accounting Cheng Ping 13, pair have the records of distance by the log screen 14 and 15 demonstrations of K value display screen.

Can carry out self check by 3 pairs of failure analyzer for taximeter of manual turntable before using, because fee register 1 uses on different vehicles, the radius of wheel of each car differs bigger, thereby different vehicle, used fee register K value design is different, detect the preceding K value that must set according to tested fee register earlier, the K value of adjustment failure analyzer for taximeter.

In the test process, can be earlier dock with the interface of mechanical driving device reservation on the sensor of tested fee register configuration and the failure analyzer for taximeter, start built-in motor 2 then, make the synchronization pulse of failure analyzer for taximeter output directly send into tested fee register 1, have the records of distance by the log screen 14 video data and the video data on the tested fee register 1 of pair in the fee register analyser compared, if the error amount of video data is in allowed band, then tested fee register is qualified, otherwise fault is arranged.To judging out of order tested fee register 1, can disconnect the pulse signal source of the sensor of tested fee register 1 configuration, and the pulse input port that the synchronization criterion pulse signal of the second built-in sensor 5 is directly introduced tested fee register 1, start built-in motor 2 once more, the line data of going forward side by side relatively, if data are in allowed band, represent that then tested fee register 1 is qualified, prove that underproof reason is that the sensor of tested fee register 1 configuration has fault; If still defective, prove that then tested fee register 1 itself has fault.

Claims

1, a kind of failure analyzer for taximeter, comprise CPU, it is characterized in that: mechanical driving device is provided with the sensor interface with interface, first sensor interface, second sensor interface and tested fee register (1) configuration of motor (2) or manual turntable (3), the input end of built-in first sensor (4) joins the INT of output terminal and CPU (9) by mechanical driving device and built-in motor (2) or manual turntable (3) ₁Pin connects, and CPU (9) joins with ROM (read-only memory) (10) and read-write memory (11), and CPU (9) is connected with K value display screen (15) by display circuit (12) and analytic accounting Cheng Ping (13), the pair screen (14) of having the records of distance by the log by display interface.

2, failure analyzer for taximeter according to claim 1, it is characterized in that: the input end of built-in second sensor (5) is joined by mechanical driving device and built-in motor (2) or manual turntable (3), and output terminal is connected with the pulse input port of tested fee register (1).

3, failure analyzer for taximeter according to claim 1 is characterized in that: the sensor input end of tested fee register (1) configuration is joined by mechanical driving device and built-in motor (2) or manual turntable (3).

4, failure analyzer for taximeter according to claim 1 is characterized in that: the INT of the output terminal of built-in first sensor (4) and CPU (9) ₁Be provided with photoelectricity between the pin and isolate change-over circuit (8).

5, according to claim 1 or 4 described failure analyzer for taximeter, it is characterized in that: the K value in the described read-write memory (11) can be rewritten by the read-write input port of CPU (9).