CN2287307Y - Fault diagnostic instrument for vehicles - Google Patents

Abstract

The utility model discloses a fault diagnostic instrument for vehicles, comprising a power source 5. The utility model is characterized in that the utility model also comprises a keyboard, a master control plate, a changeable plugging card, a Chinese character library and a display module. The utility model can overcome the defects that background technology can not be used on various vehicles, etc. The auxiliary diagnosis of the faults of various mechanical vehicles or the assembly system of the various mechanical vehicles can be realized.

Description

A kind of motor vehicles and machines fault auxiliary diagnosis instrument

The utility model belongs to failure diagnostic apparatus, particularly motor vehicles and machines fault auxiliary diagnosis instrument.

The utility model background technology is " a vehicle failure auxiliary diagnosis instrument ", and its patent No. is 942018850.This product mainly is made up of shell, main control circuit, Chinese characters display screen, keyboard etc.This product can deposit normal fault and the treating method that takes place of automobile in static storage, passes through key operation when needing, and former state shows from Chinese characters display screen again; But it is to be overcome that this product has following deficiency to have: (1) owing to there is not the restriction of replaceable plug-in card and addressing bit number, the static storage storage capability is limited.Thereby an instrument can only be confined to use restricted application on a certain specific model automobile.(2) this product just deposits Chinese character information simply in certain sequence and takes out, and does not possess intelligent functions such as reasoning and auxiliary diagnosis.(3) owing to adopted character library and Chinese display piece to split, character library with treat that display information is stored in the structure of one, the software programming difficulty is big, debugging, revises difficultly, should not form extendible modular construction.Hardware Chinese display piece is difficult to independent, is difficult to be generalized in other intelligent Chinese display instrument.(4) circuit organization is complicated, does not have clear unified bus structure or socket, brings more inconvenience for the operation and maintenance of instrument.

The purpose of this utility model is to provide a kind of and uses, possesses intelligent functions, operation and maintenances such as reasoning and auxiliary diagnosis motor vehicles and machines fault auxiliary diagnosis instrument easily on multiple motor vehicles and machines or its system synthesis.

The technical solution of the utility model is realized by following measures: a kind of motor vehicles and machines fault auxiliary diagnosis instrument, it comprises power supply 5, it is characterized in that it also comprise keyboard 1, rise message exchange reasoning and master control board 2, a certain motor vehicles and machines of storage or the assembly system diagnostics information of control action replaceable plug-in card 3, be used to store Chinese character base and display module 4 that Chinese character shows yard and shown; Its annexation is: be connected with contact pin 4.4 on the display module 4 by 30 core jacks 2.6 on this plate and Chinese character base as the master control board 2 of core component, be connected with printed panel end 3.2 on the replaceable plug-in card 3 by the slot on this plate 2.7; Be connected with lead end 1.2 on the keyboard 1 by these plate 8 core jacks 2.1, all integral body that connect are packed in the housing.Principle of work of the present utility model: the utility model is applicable to the fault auxiliary diagnosis of all kinds of motor vehicles and machines and assembly system thereof, and key is to select suitable replaceable plug-in card.Now only be diagnosed as example principle of work is described with the petrol engine oil path failure.At first select the corresponding replaceable plug-in card of gasoline engine, change plug-in card after, energized starts instrument work by start-up routine in the replaceable plug-in card, printed words " incision fast " and " failure modes menu " function appear in Chinese characters display screen; Secondly, select a certain function by numerical key " 1 " or " 2 "; Once more, if choose " failure modes menu " then screen display menu content successively, select a menu by " T " or " N " key, and further by " affirm " or " " negate " numerical key of key or prompting is answered the problem that proposes in the instrument reasoning; as " over-emitting black exhaust "? " blow out "? etc.; the diagnosis of reasoning successively, and point out corresponding treating method and step; The 4th, if choose " incision fast " function,, import the various symptom codes of seeing continuously by numerical key then according to operation instruction " failure symptom code table ", cut reasoning process fast, obtain diagnostic result and treating method.The utility model is compared following in addition different with background technology, though promptly title is identical, but circuit structure difference, for master control board, the utility model is to export from Q0-Q7 behind latch by P0.0-P0.7 in the single-chip microcomputer, the formation standard is hanged down eight bit address lines, makes single-chip microcomputer carry out exchanges data with move instruction easily; Constitute unified three-bus structure (data, address, control), be convenient to circuit modular, be convenient to seriation and maintenance; Said structure cooperates with dynamic memor and " symptom code table ", is convenient to quick incision, realizes small-sized expert reasoning and computing; For background technology, data processing circuit (dynamic and static memory) directly is connected with single-chip microcomputer, and data transmit difficulty, and computing is slower, the program organization trouble; There are not unified bus structure.For Chinese character base and display module, the utility model is Chinese character base and shows that both constitute a module and unified bus architecture is directly pegged graft, is convenient to circuit modular, be convenient to transplant and programming, and background technology then is that Chinese character base separates with display, does not possess advantage of the present utility model.For replaceable plug-in card, the utility model has enlarged its function and range of application, constitutes tandem product, thereby upgrading, expands easily; Background technology then deposits the content modification difficulty in, does not possess outside fast changeable structure.The utility model is compared with background technology, following beneficial effect is arranged: (1) can carry out auxiliary diagnosis to fault on multiple motor vehicles and machines: this is because the utility model adopts outside replaceable plug-in card, by changing " replaceable plug-in card:; each is little: the function of " replaceable plug-in card " is corresponding a certain motor vehicles and machines or assembly system, thereby reaches the auxiliary diagnosis to multiple motor vehicles and machines fault; (2) have intelligent functions such as reasoning and auxiliary diagnosis: just realize expert reasoning, this is because added the dynamic memor of larger capacity in master control board, all kinds of softwares in conjunction with single-chip microcomputer, replaceable plug-in card, can realize various computings and reasoning from logic, can be by simple question and answer or input information sign indicating number, realize the reasoning of expert's formula, auxiliary diagnosis fault, reach the function of the little expert in the pocket; (3) convenient maintenance; This is because Chinese character base and dot matrix display are made a general module, and interconnect by bus structure, not only improved the maintainability of this instrument, make software design comparatively simple, and can be used as shared module and move to easily on the other kinds intelligent Chinese display instrument, reach easy to use; (4) owing to adopt keyboard input information sign indicating number (code), so can realize fast query, cut inference procedure fast, the time is short, efficient is high.

Description of drawings: accompanying drawing 1 is a functional-block diagram of the present utility model; Accompanying drawing 2 is master control board structural representations of the present utility model; Accompanying drawing 3 is structural representations of replaceable plug-in card of the present utility model; Accompanying drawing 4 is Chinese character of the present utility model and display module structural representation; Accompanying drawing 5 is keyboard (1) structural representations; Accompanying drawing 6 is circuit diagrams of master control board (2); Accompanying drawing 7 is keyboard (1) circuit diagrams; Accompanying drawing 8 is circuit diagrams of Chinese character base and display module (4); Accompanying drawing 9 is circuit diagrams of replaceable plug-in card (3).

Now in conjunction with the accompanying drawings the utility model is further described: a kind of motor vehicles and machines fault auxiliary diagnosis instrument, it comprises power supply 5, it is characterized in that it also comprise keyboard 1, rise message exchange reasoning and master control board 2, a certain motor vehicles and machines of storage or the assembly system diagnostics information of control action replaceable plug-in card 3, be used to store Chinese character base and display module 4 that Chinese character shows yard and shown; Its annexation is: be connected with contact pin 4.4 on the display module 4 by 30 core jacks 2.6 on this plate and Chinese character base as the master control board 2 of core component, be connected with printed panel end 3.2 on the replaceable plug-in card 3 by the slot on this plate 2.7; Be connected with lead end 1.2 on the keyboard 1 by these plate 8 core jacks 2.1, all integral body that connect are packed in the housing.Master control board 2 comprises single-chip microcomputer 2.3, crystal oscillating circuit, power circuit, latch 2.5,32KRAM dynamic memor 2.4, jack 2.1,2.6, slot 2.7; To be jack 2.1 drawn by the P1.0-P1.6 of single-chip microcomputer 2.3 its annexation, crystal oscillating circuit is by single-chip microcomputer XTAL1 and XTAL2 input, + 5V power supply and ground wire are connected on the Vcc and the Vss end of single-chip microcomputer 2.3 respectively, in the single-chip microcomputer 2.3 P0.0-P0.7 composition data line and low eight bit address lines respectively with the D0-D7 of latch 2.5, the D0-D7 of dynamic memor connects, and the J16-J23 heart yearn and the jack 2.6 of formation bus, slot 2.7 connects, P0.0-P0.7 is behind latch 2.5 in the single-chip microcomputer, export from Q0-Q7, constitute low eight bit address lines, be connected with the A0-A7 of dynamic memor 2.4, and the J8-J15 heart yearn of formation bus, P2.6-P2.0 in the single-chip microcomputer 2.3 constitutes high 7 bit address lines, be connected with the A14-A8 of dynamic memor 2.4, and the J1-J7 heart yearn of formation bus, P2.7 makes the chip selection signal line in the single-chip microcomputer 2.3, be connected with CE end in the dynamic memor 2.4, and the JO heart yearn of formation bus, ALE is connected with G end in the latch 2.5 in the single-chip microcomputer 2.3, read and write Controlling Source RD, WR is connected with OE WE in the dynamic memor 2.4 respectively, Vcc in the single-chip microcomputer 2.3, PSEN, TO, Vss, P1.7 constitutes the J24-J28 heart yearn of bus, wherein power lead J24, J27 respectively with dynamic memor 2.4 in Vcc, GND connects.Chinese character base and display module 4, comprise 128 * 32 or 128 * 16 dot matrix display 4.1,32K Chinese character memory chip 4.2 and 30 core contact pins 4.4, its annexation is: contact pin 4.4 inserts in the jack 2.6, contact pin 4.4 directly inserts in the bus, and wherein J0 and J1-J7 are connected with CE end, A14-A8 end in the Chinese character memory chip 4.2 respectively; J8-J15 is connected with A0-A7 in the Chinese character memory chip 4.2; J8-J10 is connected with D/I, R/W, RES end in the display 4.1 respectively; J16-J23 is connected with D0-D7 in the Chinese character memory chip 4.2 respectively, and is connected with D0-D7 in the display 4.1, J24 respectively with Chinese character memory chip 4.2 in Vcc, Vpp, display 4.1 in Vcc be connected; OE end in J25 and the Chinese character memory chip 4.2 is connected; E end in J26 and the display 4.1 is connected; J27 connects the Vss of Chinese character memory chip 4.2 and the Vss in the display 4.1 simultaneously; J28 is connected with CS in the display.Replaceable plug-in card 3 comprises 32KEPROM3.1, track link 3.2, its annexation is, track link 3.2 is pegged graft with the slot 2.7 in the master control board 2, turn-on bus J0-J27, J28 vacant need not, J0 is connected with CE sheet choosing end among the 32KEPROM3.1 behind phase inverter, J1-J7 is connected with A14-A8 among the EPROM3.1; J8-J15 is connected with A0-A7 among the EPROM3.1, and J16-J23 is connected with D0-D7 among the EPROM3.1; J24 connects Vcc and the Vpp among the EPROM3.1 simultaneously; J25 is connected with OE among the EPROM3.1; J27 is connected with Vss among the EPROM3.1.Keyboard 1 comprises 12 film keys, transparency display window and exit 1.2; Film key is affixed on the housing, pegs graft by exit 1.2 and the slot 2.1 in the master control board 2; Exit 1.2 is made of 7 line L0-L6, and wherein L0-L3 constitutes horizontal line, respectively by being connected with+5V power supply behind the resistance; L4-L6 constitutes three ordinates, and co-ordination only just communicates when intersection point is pressed, and constituting 12 keys is respectively Y, N, 1-9,0.

Each parts, element, model require table as follows:

Ingredient	Components and parts	The model requirement
			Master control board 2	Single-chip microcomputer 2.3	8031 series, 51 series, AT51 series
Latch 2.5	74LS373、74HC373
		Dynamic memor 2.4		62256、62C256、62128、62C128
Socket 2.6	30 cores are single
		Slot 2.7		30 cores are single
Replaceable plug-in card 3	?32KEPROM?3.1				27C256、27256
		Phase inverter	74HC00
	Chinese character base and display module 4			Dot matrix Chinese display device 4.1	Other dot matrix display of LMG-MS12A32 or 128-32
Chinese character memory chip 4.2		27C256、27256
			Contact pin	The single array of 29 or 30 cores
Keyboard 1		The film touch keyboard			Base material is soft polyester diaphragm, and circuit is the conductive circuit plate

Claims (5)

1. motor vehicles and machines fault auxiliary diagnosis instrument, it comprises power supply (5), it is characterized in that it also comprise keyboard (1), rise message exchange reasoning and master control board (2), a certain motor vehicles and machines of storage or the assembly system diagnostics information of control action replaceable plug-in card (3), be used to store Chinese character base and display module (4) that Chinese character shows yard and shown; Its annexation is: be connected with contact pin (4.4) on the display module (4) by 30 core jacks (2.6) on this plate and Chinese character base as the master control board (2) of core component, be connected with printed panel end (3.2) on the replaceable plug-in card (3) by the slot on this plate (2.7); Be connected with lead end (1.2) on the keyboard (1) by these plate 8 core jacks (2.1), all integral body that connect are packed in the housing.

2. a kind of motor vehicles and machines fault auxiliary diagnosis instrument according to claim 1, it is characterized in that master control board (2) comprises single-chip microcomputer (2.3), crystal oscillating circuit, power circuit, latch (2.5), 32KRAM dynamic memor (2.4), jack (2.1), (2.6), slot (2.7); Its annexation is: jack (2.1) is drawn by the P1.0-P16 of single-chip microcomputer (2.3), crystal oscillating circuit is by single-chip microcomputer XTAL1 and XTAL2 input, + 5V power supply and ground wire are connected on the Vcc and the Vss end of single-chip microcomputer (2.3) respectively, in the single-chip microcomputer (2.3) P0.0-P0.7 composition data line and low eight bit address lines respectively with the D0-D7 of latch (2.5), the D0-D7 of dynamic memor connects, and the J16-J23 heart yearn and the jack (2.6) of formation bus, slot (2.7) connects, P0.0-P0.7 is behind latch (2.5) in the single-chip microcomputer, export from Q0-Q7, constitute low eight bit address lines, be connected with the A0-A7 of dynamic memor (2.4), and the J8-J15 heart yearn of formation bus, P2.6-P2.0 in the single-chip microcomputer (2.3) constitutes high 7 bit address lines, be connected with the A14-A8 of dynamic memor (2.4), and the J1-J7 heart yearn of formation bus, P2.7 makes the chip selection signal line in the single-chip microcomputer (2.3), be connected with CE end in the dynamic memor (2.4), and the J0 heart yearn of formation bus, ALE is connected with G end in the latch (2.5) in the single-chip microcomputer (2.3), read and write Controlling Source RD, WR respectively with dynamic memor (2.4) in OE, WE connects, Vcc in the single-chip microcomputer (2.3), PSEN, TO, Vss, P1.7 constitutes the J24-J28 heart yearn of bus, wherein power lead J24, J27 respectively with dynamic memor (2.4) in Vcc, GND connects.

3. a kind of motor vehicles and machines fault auxiliary diagnosis instrument according to claim 1, it is characterized in that Chinese character base and display module (4), comprise 128 * 32 or 128 * 16 dot matrix display (4.1), 32K Chinese character memory chip (4.2) and 30 core contact pins (4.4), its annexation is: contact pin (4.4) inserts in the jack (2.6), contact pin (4.4) directly inserts in the bus, and wherein J0 and J1-J7 are connected with CE end, A14-A8 end in the Chinese character memory chip (4.2) respectively; J8-J15 is connected with A0-A7 in the Chinese character memory chip (4.2); J8-J10 is connected with display (4.1) middle D/I, R/W, RES end respectively; J16-J23 is connected with D0-D7 in the Chinese character memory chip (4.2) respectively, and is connected with D0-D7 in the display (4.1), J24 respectively with Chinese character memory chip (4.2) in Vcc, Vpp, display (4.1) in Vcc be connected; OE end in J25 and the Chinese character memory chip (4.2) is connected; E end in J26 and the display (4.1) is connected; J27 connects the Vss of Chinese character memory chip (4.2) and the Vss in the display (4.1) simultaneously; J28 is connected with CS in the display.

4. a kind of motor vehicles and machines fault auxiliary diagnosis instrument according to claim 1, it is characterized in that replaceable plug-in card (3) comprises 32KEPROM (3.1), track link (3.2), its annexation is: track link (3.2) is pegged graft with the slot (2.7) in the master control board (2), turn-on bus J0-J27, J28 vacant need not, J0 is connected with CE sheet choosing end among the 32KEPROM (3.1) behind phase inverter, J1-J7 is connected with A14-A8 among the EPROM (3.1); J8-J15 is connected with A0-A7 among the EPROM (3.1), and J16-J23 is connected with D0-D7 among the EPROM (3.1); J24 connects Vcc and the Vpp among the EPROM (3.1) simultaneously; J25 is connected with OE among the EPROM (3.1); J27 is connected with Vss among the EPROM (3.1).

5. a kind of motor vehicles and machines fault auxiliary diagnosis instrument according to claim 1 is characterized in that keyboard (1) comprises 12 film keys, transparency display window and exits (1.2); Film key is affixed on the housing, pegs graft by exit (1.2) and the slot (2.1) in the master control board (2); Exit (1.2) is made of 7 line L0-L6, and wherein L0-L3 constitutes horizontal line, respectively by being connected with+5V power supply behind the resistance; L4-L6 constitutes three ordinates, and co-ordination only just communicates when intersection point is pressed, and constituting 12 keys is respectively Y, N, 1-9,0.

Images