CN2255634Y - Dynamic recorder for motor vehicle - Google Patents

Abstract

The utility model relates to a dynamic recorder and the printer thereof for a motor vehicle, which is used for recording the dynamic data of vehicles for accident analysis. The dynamic recorder comprises a microcomputer, a time circuit and a parallel interface circuit, wherein, a data bus of the microcomputer is connected with a data bus of the parallel interface. The signal of a monitored point in the vehicle is fed back to the microcomputer for treatment via the parallel interface circuit; a printing output interface is matched with a printing input interface of the printer. The output printer comprises a printing head, a drive circuit, a control circuit, and an input interface circuit with a switch, wherein, the input interface of the input interface circuit is matched with the output interface of the dynamic recorder. The utility model has the advantages of quick information transmission, convenient utilization, and accurate, complete and reliable data; the utility model has the advantages that the printer is portable, the data can be printed at site, and the accident analysis can be performed in time and efficiently.

Description

The motor vehicle dynamic recorder

The utility model relates to a kind of motor vehicle dynamic recorder, belongs to the transportation and communication field of instrumentation technology, is specially adapted to the accident monitoring to running car.

Existing vehicle dynamic registering instrument, a kind of is instantaneous Displaying Meter, as the kilometer table, speedometer etc., but these data can not preserve, and can not reflect the dynamic data that vehicle has an accident that time, thereby after car accident took place, no datat was analyzed foundation.In recent years, occurred a kind ofly handling the technical scheme of vehicle dynamic data, but the display screen that has plenty of by registering instrument itself shows dynamic data with microcomputer (microcomputer), can't output data; Its shortcoming is that it can only can not be analyzed as the data strange land as some interim reference numbers that shows, more can not deposit archives in.Also having a kind of is registering instrument to be taken out the back connect with common computer from vehicle, just can print result to registering instrument is recorded after putting layout in order by common computer (as 286 or 386 etc.), the single-chip microcomputer incoming line and the measured signal point of this registering instrument directly link, and, between registering instrument and the common computer, what adopt is that serial line interface connects, its operation is very complicated, must the professional can operate, and detect and to finish at the scene, detection speed is very slow, wastes time and energy; Equipment investment simultaneously is big.

The purpose of this utility model is: the shortcoming that overcomes above-mentioned technology, provide a kind of operation push-button few, easy to use, information transmission is fast, just can the printing problem data in the vehicle site of an accident, operating personnel do not need special training with regard to operable, vehicle dynamic registering instrument.

The technical scheme of dynamic recorder of the present utility model is: it includes microcomputer (miniature), time circuit and parallel interface; The data bus of this microcomputer connects with the parallel interface chip data bus of parallel interface, the signal of the monitored point in the vehicle, as the speed of a motor vehicle, turn to, information such as braking feeds back to after by parallel interface and handles in the microcomputer; The printing input interface of output print interface and printing equipment is complementary.

The technical scheme of the output print device of the utility model dynamic recorder is: it comprises printhead, driving circuit, controller, and the input interface circuit of belt switch; The interface of this input interface circuit and the output interface of dynamic recorder are complementary.

Above-mentioned the utility model motor vehicles dynamic recorder is installed on the motor vehicles, and particularly in the pilothouse of automobile, the monitored point in the vehicle can be the speed monitoring point in the wheel box, generally realizes signals collecting with speed pickup; The monitoring point that positions such as front car light, back car light, steering mechanism, arrestment mechanism, reversing can also be arranged.Vehicle is in the middle of actual motion, at any time registration of vehicle running state data, refresh p.s. once, when having an accident, the procedure auto-control of the microcomputer by dynamic recorder, finish signal and take, analyze, write down storage, accident is taken place at that moment and at that moment before vehicle status data in one minute be retained in the dynamic recorder.When calling data when the needs evaluation, (generally being the traffic police personnel) directly links printing equipment in the place where the accident occurred by interface line and dynamic recorder, start print switch, can the printing problem dynamic data.When transferring these data, need not from vehicle, take out dynamic recorder, and only according to the record data on the print data paper tape, just intuitive analysis culprit then and there and definite accident responsibility people, and give over to using case trial electric with or file.

The utility model is further described below in conjunction with drawings and Examples:

Fig. 1, be the dynamic recorder structure principle chart that has the printout interface on the parallel interface.

The dynamic recorder structure principle chart that has the printout interface on Fig. 2, the microcomputer.

Fig. 3, parallel interface pin figure.

Fig. 4, printing equipment block diagram.

Fig. 5, print routine figure.

Subordinate list, one group of print data (partial data).

Among the figure: (1), central processing unit; (2), address bus; (3) memory under program; (4), data memory; (5), data bus; (6), time circuit; (7), parallel interface; (8) monitor signal input interface; (9), monitoring point on the vehicle; (10) printing equipment; (11) printout interface; (12), chip select circuit; (13) read/write circuit; (11 ') print control bus.

The accompanying drawing sign that relates to printing equipment is: (14), printing input interface circuit; (15), controller; (16), driving circuit; (17), printhead; (18), power supply.

As Fig. 1 is an embodiment of the utility model dynamic recorder, and its microcomputer (being microcomputer) includes central processing unit (1), address bus (2), memory under program (3), data memory (4), chip select circuit (12) and read/write circuit (13); Central processing unit (1) comprises arithmetical unit and controller composition, and arithmetical unit comprises calculating states logical block, totalizer, working storage, programmable counter, program status register, stack register, data pointer register and boolean processor; Controller comprises order register, command decoder, steering logic display and clock oscillator.The clock of time circuit is selected 8MHZ for use, and memory under program adopts EPROM (2718) chip, and data memory is selected a slice static RAM (SRAM) (6264) for use, and it has power-down protection apparatus, is furnished with automatic rechargable battery, but protected data reaches two months.

Fig. 1 is the embodiment that has the dynamic recorder of printout interface (11) and monitor signal input interface (8) on the parallel interface (7), be that the output print interface is the interface on the parallel interface, this output print interface can also be the printing interface on the microcomputer, as shown in Figure 2, printing interface (11) is located on the central processing unit (1), (11 ') be to print control bus.

Fig. 3 is that chip that parallel interface (7) is adopted is 8255 pin figure.This chip has three port PA, PB, PC, can be divided into two interfaces (JP1 and JP2), is respectively monitor signal input interface (8) and printout interface (11) and connects; Parallel interface (7) is a programmable peripheral interface, and its chip has 38 parallel I/O mouth PA, PB, PC, and PC wherein divides high 4 mouths and low 4 mouths again, can change the work of its I/O by software programming.Among Fig. 1, Fig. 3,8255 directly link with central processing unit (1) data bus (5).A0, A1 are used for selecting 8255 inner three data ports, (PA, PB, PC).RD, WR is the read-write control signal of read/write circuit (13), 8255 A0 in native system, A1 directly links to each other with address wire A0, the A1 of address bus (2), and CS then contact pin selects circuit (12).

Time circuit (6) is an obliterated data not under the powering-off state; Timing with second, branch, the time, day, the moon, year mode, and the leap year compensate function is arranged, the time is with the indication with PM, AM of 24 hours systems or 12 hours systems in one day.Time circuit (6) can adopt the DS12887 chip, and it also has multiple characteristics, as, 128 ram cells and software interface are arranged, 14 byte clock and control registers, the general RAM of 114 bytes with the output of programming square-wave signal, has the bus compatible look-at-me.

Printing equipment of the present utility model, shown in Figure 5 as Fig. 4, it comprises printhead (17), driving circuit (16), controller (15) is printed input interface circuit (14), this interface circuit (14) has switch, and the output interface of its interface and dynamic recorder is complementary.Print in the input interface and comprise the printing control line interface that links with print switch, interrogation signal line interface, the signal feedback line interface of beating; When printing input interface (14) and dynamically note show that instrument printout interface (11) is connected, to print control line and controlled by switch, all the other comprise the interrogation signal line, the print signal line, all conductings such as feedback signal line are in the wait print state.

Obvious technical effects of the present utility model, data are accurate, complete, reliable, be convenient to carry out timely and effectively crash analysis, can realize purpose of the present invention.Subordinate list is one group of data printing.To print wherein 1 second data result be described as follows:

As: 951,208 212,001 0,042 00111

DATE T1ME SPEED EDCBA

Wherein 1., DATE represents year, month, day in the hurdle.On Dec 8th, 1

2., clock time is represented, that is: 21: 20: 01 in the T1ME hurdle

3., speed per hour is represented, that is: 42 kilometers/hour in the SPEED hurdle

4., the EDCBA hurdle represents the monitoring point code name, that is: A represents braking, B represents to blow a trumpet, C represents left steering, D represents right turn, E represents reversing.The action that occurs in this hurdle is represented with " 0 " and " 1 ": not action of " 0 " expression, " 1 " expression action.As: 00111 expression is braked, blows a trumpet, and the left steering lamp is opened, does not turn on the right turn lamp, not reversing.

5., this information means: this car accident occurs in 95 on Dec 8,21 o'clock, and wherein the vehicle dynamic of 20 fen 01 second moment is: 42 kilometers of speed per hours, brake, blow a trumpet, and the left steering lamp is opened.Vehicle dynamic can be pursued a second analysis by the record (per second all has delegation's document recording) of printout in the 1st second moment to its 60 seconds.The utility model dynamic recorder is one of a per car, after the installation, generally mustn't dismantle; Printing equipment is supporting with it printer, carries when can be by traffic-police on duty or office preserves ready access upon use.

951208?212003?0000?00001

Subordinate list 951,208 212,002 0,010 00101

951208?212001?0042?00111

951208?212000?0080?00110

951208?211959?0085?00110

951208?211958?0090?00011

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951208?211905?0100 0000

951208?211904?0100 0000

DATE TIME SPEED?EDCBA

Claims (6)

1, a kind of motor vehicle dynamic recorder is characterized in that it includes microcomputer, time circuit and parallel interface; The data bus of this microcomputer connects with the parallel interface data bus of parallel interface, and the signal of monitored point feeds back in the microcomputer after by parallel interface and handles in the vehicle; The printing input interface of output print interface and printing equipment is complementary.

2,, it is characterized in that described output print interface can be interface on the parallel interface or the output print interface on the microcomputer by the described dynamic recorder of claim 1.

3, by the described dynamic recorder of claim 1, it is characterized in that the parallel interface of described parallel interface has three port PA, PB, PC, can be to be divided into two interfaces, links with monitor signal input interface and printout interface respectively.

4, by the described dynamic recorder of claim 1, it is characterized in that, parallel interface is a programmable peripheral interface chip, and its PC that has among 38 parallel I/O mouth: PA, PB, the PC divides high 4 mouths and low 4 mouths again, can change the work of its I/O mouth by software programming.

5, by the described dynamic recorder of claim 1, it is characterized in that printing equipment comprises printhead, driving circuit, the input interface circuit of controller and belt switch; The interface of this input interface circuit and the output interface of dynamic recorder are complementary.

6, by the described dynamic recorder of claim 5, it is characterized in that, in the described printing input interface, comprise the printing control line interface that links with print switch, interrogation signal line interface, print signal feedback line interface.

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