JPH10122910A - Measuring instrument device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly specify an abnormality cause by judging and storing the normality/abnormality of a prescribed electric signal from a communicating device for detecting and outputting the state of a vehicle, and performing a display according to a memory part content according to switch operation. SOLUTION: The information based on the detection result of a detecting part 10 is transmitted from a communicating device 20 through a multiple communication line 40 to a measuring instrument device 30 at a prescribed period as occasion demands. A judgment part 34 judges normality/abnormality every input of the information, and the judgment result is stored in a memory part 35. Memory areas are ensured according to the kind of information in the memory part 36, and speed information, engine rotating speed information, and outside air temperature information, for example, are classified in line unit. When each information is normal, data are written in the address of the respective area, and successively rewritten and renewed. When abnormality and normality are generated, write is successively performed. The address to be used can be minimized when normality and abnormality are frequently repeated, so that it is not required to increase the capacity of the memory part 35, and the memory part 35 can be thus efficiently used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument system for a vehicle which stores the state of a vehicle, and more particularly, to a vehicle in which not only a service person but also a user of the vehicle can roughly estimate an abnormal portion of the vehicle. The present invention relates to a measuring instrument device.

[0002]

2. Description of the Related Art At the time of periodic inspection or when a user discovers an abnormality in a vehicle, the vehicle is brought into a service factory and the vehicle is inspected by a service person.

[0003] In such inspection, for example, inspection of electrical components is performed by connecting a dedicated test device. If there is no reproducibility even if the vehicle has a defect, the inspection is carried out at a service factory. Failures may not be found,
Repair work in such a case is extremely difficult.

Therefore, as disclosed in, for example, Japanese Utility Model Application Laid-Open No. 2-99309, an information storage medium capable of storing past abnormal information is prepared in a vehicle so that the information in the information storage medium can be stored at a later date. It is known that the readout facilitates vehicle maintenance.

[0005]

However, in such a device, the user of the vehicle cannot check the abnormality information through the information storage medium by himself / herself, and is not suitable for use in a service factory. Was set up for the purpose of.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a communication device for detecting a state of a vehicle and outputting information as an electric signal, and an instrument device for inputting an electric signal from the communication device and performing a predetermined display. A storage unit that is built in the meter device and determines and stores normal or abnormal electrical signals input from the communication device; a switch unit connected to the meter device; and the storage unit according to an operation of the switch unit. And a display unit for performing display according to the storage content of the unit.

According to the present invention, there is provided a communication device for detecting a state of a vehicle and outputting at least information relating to a traveling distance as an electric signal, and a display for inputting an electric signal from the communication device and displaying at least a traveling distance. A measuring device having a unit, a storage unit that is built in the measuring device, stores at least data relating to a traveling distance, and determines and stores a normal or abnormal electric signal input from the communication device, and is connected to the measuring device. And a switch unit for enabling the display unit to switch between a display relating to the traveling distance and a display relating to the normal / abnormal state.

Further, according to the present invention, a storage area is secured in the storage unit in accordance with the type of information, and when each information is normal, the data of the information is stored in a first address of each area. Is written as it is, and the same address is sequentially overwritten and updated during normal operation. If any information is abnormal, the data of the information is written as it is at the second address of the information. When the information is overwritten and updated to the same address, and the information returns to normal, the data of the information is written as it is to the third address of the information. During normal operation, the information is overwritten and updated at the same address sequentially. , Are sequentially written to a new next address.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A meter unit 30 has a control unit (CPU) 31 for performing predetermined processing, an interface unit 32 for inputting an electric signal from the communication device 20, and a control unit 31 based on a signal from the interface unit 32. A display unit 33 that performs display in accordance with the instruction of the above, a determination unit 34 that determines whether the signal from the interface unit 32 is normal or abnormal, a storage unit 35 that stores the determination result of the determination unit 34, and a switch that can be operated by the user of the vehicle The display unit 33 switches between normal display and display of an abnormal portion estimated based on the storage state of the storage unit 35 in response to the operation of the switch unit 36. The display unit 33 is a digital mileage display unit that serves both as an odometer and a trip meter, and the storage unit 35 is a non-volatile memory (EE) that stores mileage data. ROM) portion of the push button type switch for switching display on the display unit 33 as a switch unit 36 for odometer or for trip meter, it can be used. By operating the switch unit 36, the control unit 31 goes to read the storage unit 35, and based on the data, when an abnormality is stored, a predetermined display is displayed on the display unit 33 to use the data. The user can roughly estimate the abnormal part of the vehicle by the type of display.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings.

FIG. 1 is a block diagram illustrating the configuration of a first embodiment to which the present invention is applied. Reference numeral 10 denotes a plurality of sensors 11 installed at various points of the vehicle to detect the state of the vehicle.
And a detection unit 20 including various actuators 12 for controlling the vehicle, and a communication device 30 that receives an electric signal from the detection unit 10 and outputs information based on the electric signal as an electric signal, for example, by serial communication. Communication device 20
Instrument device that performs a predetermined display by inputting an electric signal from the
A multiplex communication line 40 connects the communication device 20 and the meter device 30.

The communication device 20 has an interface unit 21 which receives electric signals from the detecting unit 10 and outputs information based on these electric signals as electric signals.

A control unit (CPU) 31 for performing predetermined processing, an interface unit 32 for inputting an electric signal from the communication device 20, an interface unit 32
A display unit 33 for performing display in accordance with an instruction from the control unit 31 based on a signal from the control unit 31; a determination unit 34 for determining whether the signal from the interface unit 32 is normal or abnormal; a storage unit 35 for storing the determination result of the determination unit 34; The display unit 33 has a switch unit 36 that can be operated by a user or the like, and switches the normal display and the display of the abnormal part estimated based on the storage state of the storage unit 35 in accordance with the operation of the switch unit 36. indicate.

For example, as the display section 33, a 6-digit digital mileage display section which serves as both an odometer and a trip meter, as the storage section 35, a part of a non-volatile memory (EEPROM) for storing mileage data, a switch As the unit 36, a switch for switching the display on the display unit 33 to an odometer or a trip meter can be used.

Next, the operation will be described. Information based on the detection result of the detection unit 10 is transmitted from the communication device 20 to the meter device 30 at a constant cycle from the communication device 20 via the multiplex communication line 40. The determining unit 34 determines whether the information is normal or abnormal each time this information is input. Specifically, for example, in the case of speed information, the detected minimum speed (0 km / h) to the detected maximum speed (for example, 180 km / h)
h) is the data corresponding to the speed within the range, and in the case of the engine speed information, the detected minimum speed (0r.p.
m.) to whether or not the data corresponds to a rotation speed within a range of a maximum detection rotation speed (for example, 10,000 rpm). In the case of outside air temperature information, a minimum detection temperature (−20 ° C.) to a maximum detection temperature. Based on preset conditions such as whether or not the data corresponds to a temperature in the range of (50 ° C.), it is determined that the data is normal if the temperature is within the range and abnormal if the temperature is out of the range. Also, when a signal is not input at a predetermined cycle, it is determined that the signal is abnormal.

The result of the determination is stored in the storage unit 35 regardless of whether the result is normal or abnormal. For example, a storage area is secured in the storage unit 35 according to the type of information. Specifically, as shown in FIG. 2, the area A is speed information, the area B is engine speed information, and the area C is If the information is normal, the data of the information is written as it is to the address 00 of each area, and the same address 00 is sequentially written during normal operation.
Is overwritten and updated (step 1).

If an abnormality is found in any of the information, the data of the information is written as it is at the address 01 of the information, and while the information is abnormal, the information is sequentially overwritten and updated to the same address 01 (step 2).

Next, when the information returns to normal, the data of the information is written as it is at the address 02 of the information,
While the information is normal, the same address 02 is sequentially overwritten and updated (step 3).

Thereafter, when an abnormal condition and a normal condition occur, steps 2 and 3 are repeated to sequentially write data at the next address.

Therefore, when normal and abnormal are not frequently repeated, the number of addresses used is small, and the storage unit 3
It is not necessary to secure a large capacity of the storage unit 5 and the storage unit 3 can be efficiently stored.
5 can be used.

[0021] Such a storage method requires less storage capacity than a method of sequentially storing states, thereby enabling cost reduction. In addition, since the data before and after can be compared as compared with the method of storing only at the time of abnormality, the cause of the abnormality can be quickly specified.

Then, the service person can use the storage unit 35
By confirming the above data, it is possible to roughly estimate the abnormal part of the vehicle, and it is possible to select necessary maintenance even if the abnormality is not reproduced in the service factory.

Further, according to the present invention, by operating the switch unit 36 by the user of the vehicle, for example, by continuously pressing the switch unit 36 for several seconds, the control unit 31 goes to read the storage unit 35 and reads the data. When an abnormality is stored, a predetermined display is performed on the display unit 33.

Specifically, when data indicating an abnormality is stored in the area A of the storage unit 35, "-0001-"
Abnormal display of the speed detection point by display (see FIG. 3A),
When the data indicating the abnormality is stored in the area B, the abnormality is displayed at the engine rotational speed detection point by “−0002−” (see FIG. 3B), and the data indicating the abnormality is stored in the area C. In this case, an abnormality display of the outside air temperature detection point is performed by displaying "-0003-" (see c in FIG. 3). When data indicating an abnormality is stored in the areas A and B, "-0010-" is displayed. 3 (d in FIG. 3). If data indicating an abnormality is stored in the areas A and B, the speed detection point is displayed by "-0020-". And an abnormal display of the outside air temperature detection point (see e in FIG. 3). When data indicating an abnormality is stored in the areas B and C, "-0030"
An abnormality display (refer to f in FIG. 3) of the engine speed detection location and the outside air temperature detection location is performed by displaying "-", and if data indicating an abnormality is stored in the areas A, B, and C, "-" 0100- "indicates an abnormal display of the speed detection location, the engine speed detection location, and the outside air temperature detection location (g in FIG. 3).
See). If the data is not stored, it is possible that the multiplex communication line 40 is abnormal.
I do. If there is no abnormality, for example, "-000
0- ”display (see i in FIG. 3) or blank display in which nothing is displayed.

As described above, it is desirable that the abnormal display is designed differently from the normal display (see j in FIG. 3). By looking at the display section 33, it is possible to roughly estimate the abnormal position of the vehicle by the type of display. can do.

FIG. 4 is a block diagram for explaining the configuration of the second embodiment to which the present invention is applied. The same or corresponding parts as those in the first embodiment of FIG. Omit description.

In the second embodiment, the instrument device 30 includes:
Display unit 33 for displaying an abnormality in the first embodiment
(See FIG. 1). That is, the instrument device 30
Has a structure like an analog pointer indicating instrument (the body of the instrument is omitted) and cannot display the abnormality.

In such a configuration, another display device separately mounted on the vehicle, for example, an independent display unit 50 such as a digital timepiece, which is disposed separately from the meter device 30, is different from that of the above embodiment. A similar display may be performed.

[0029]

The present invention relates to a communication device for detecting a state of a vehicle and outputting information as an electric signal, an instrument device for inputting an electric signal from the communication device and performing a predetermined display, and the instrument device. A storage unit that is built in and stores and determines whether a normal or abnormal electrical signal is input from the communication device, a switch unit that is connected to the meter device, and storage contents of the storage unit according to an operation of the switch unit And a display unit for performing display according to the display unit.By confirming the data in the storage unit by the display on the display unit, it is possible to roughly estimate the abnormal location of the vehicle, Even if not reproduced, necessary maintenance can be selected.

According to the present invention, there is provided a communication device for detecting a state of a vehicle and outputting at least information relating to a traveling distance as an electric signal, and a display for inputting an electric signal from the communication device and displaying at least a traveling distance. A measuring device having a unit, a storage unit that is built in the measuring device, stores at least data relating to a traveling distance, and determines and stores a normal or abnormal electric signal input from the communication device, and is connected to the measuring device. A switch unit that can be switched between a display related to a traveling distance and a display related to the normal / abnormal in the display unit,
For example, a digital odometer display unit that serves as an odometer and a trip meter as a display unit, a part of a non-volatile memory that stores mileage data as a storage unit, and a display unit for an odometer or a trip meter as a switch unit. The switch can be used to switch the instrument, so that the instrument device can be formed inexpensively and compactly without adding new parts.

According to the present invention, a storage area is secured in the storage section in accordance with the type of information, and when each information is normal, the data of the information is stored in the first address of each area. It is written as it is, and it is sequentially overwritten and updated at the same address during normal operation, and if any information is abnormal,
The data of the information is written as it is at the second address of the information, and the data is overwritten and updated at the same address sequentially during an abnormal state. When the information returns to normal, the data of the information is written as it is at the third address of the information. During normal operation, the same address is sequentially overwritten and updated, and when an abnormality and normal occur, writing is sequentially performed to a new next address.If normal and abnormal are not repeated frequently, Since the storage capacity is small, the cost can be reduced, and since the data before and after can be compared, the cause of the abnormality can be quickly identified.

[Brief description of the drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a configuration of a storage unit according to the embodiment.

FIG. 3 is an explanatory diagram of a display example of the embodiment.

FIG. 4 is a block diagram of a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 20 communication device 30 instrument device 31 control unit 32 interface unit 33 display unit 34 determination unit 35 storage unit 36 switch unit 40 multiplex communication line 50 independent display unit (display unit)

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI G01D 7/00 G01D 7/00 G K G01M 17/007 G01M 17/00 J

Claims (3)

[Claims] 1. A communication device that detects a state of a vehicle and outputs information as an electric signal, an instrument device that receives an electric signal from the communication device and performs a predetermined display, and a built-in instrument device. A storage unit that determines and stores normal or abnormal electrical signals input from the communication device, a switch unit connected to the meter device, and a display corresponding to the storage content of the storage unit according to an operation of the switch unit And a display unit for performing the following. 2. A communication device for detecting a state of a vehicle and outputting at least information on a traveling distance as an electric signal,
A meter device having a display unit for inputting an electric signal from the communication device and displaying at least a mileage, and at least data related to the mileage stored in the meter device and the electric power input from the communication device. A storage unit that determines and stores a normal abnormality of a signal, and a switch unit that is connected to the instrument device and that enables switching between a display related to a traveling distance on the display unit and a display related to the normal abnormality. Characteristic vehicle instrument device. 3. A storage area is secured in the storage section in accordance with the type of information. When each information is normal, the data of the information is written as it is to a first address of each area. During normal operation, the same address is sequentially overwritten and updated. If any information is abnormal, the data of the information is written as it is to the second address of the information. The information is updated, and when the information returns to normal, the data of the information is written as it is at the third address of the information. During the normal time, the information is overwritten and updated at the same address. The vehicle instrument device according to claim 1 or 2, wherein the address is sequentially written.