JPS6039954A - Multiplex communication device for travelling subject - Google Patents

Abstract

PURPOSE:To ensure proper transmission operation by stopping the succeeding transmission operation when any job unit generates an abnormality and transferring the mode to the transmission operation of the job unit of the next order. CONSTITUTION:A management unit 10 supervising the transmission operation of the job units 1-7 is provided additionally, and when the operation of, e.g., job unit 2 generates the abnormality, the management unit 10 reading a transmission data S2 of the job unit 2 detects the abnormality and outputs a signal SM. Then the job unit 3 is designated to execute transmission operation. Further, the fault is informed to the operator via an abnormality display element provided on an instrument panel.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multiplex communication device for a mobile body suitable as a signal transmission system in a mobile body such as an automobile.

In recent years, various control devices have been developed and installed in automobiles in order to further improve the functions of automobiles, and as a result, signal transmission has become more complex and larger. wire harnesses are becoming more complex and bulky. Therefore, multiplex communication systems were adopted to simplify and rationalize wiring harnesses. A multiplex communication system attempts to transmit signals using a small number of wire harnesses by combining and multiplexing individual signals.

Here, an example of the configuration of a conventional multiplex communication system will be described. Conventionally, the signal line and the power line were the same thing in the wiring that connected each load and the operating unit, but in a multiplex communication system, the signal line and the power line were connected at the same time, and the signal line Regarding the transmission control circuit, the 0 signal line constituted by 11η is provided with a transmission control circuit section equipped with each operation means for generating control commands to each load, and a reception control circuit section for controlling each load. Arranged between the circuit section and the reception control circuit section,
The multiplexed signal is transmitted from the transmission control circuit section to the reception Rj control circuit section 3. In this case, the signal is multiplexed -
With C-ildame wires, the wires can be made of wood, and the wiring harness can be simplified. J, the transmission control circuit section and the reception control circuit section are composed of a switch circuit network consisting of four relay switches or a microcomputer, and
11 Control circuit part only? By detecting the operating state of the specified operating means, a specified command No. 157 is transmitted, and the reception control circuit section receives and decodes the command 1, closes the specified switch as appropriate, and disconnects the specified load from the power line. It has the function of supplying power to the

In "-", conventionally (51:, transmission control circuit section C1
The receiving control circuit is located near the driver's seat, which is equipped with operating means such as quiet switches, etc., and forms the main control device, while a plurality of receiving control circuits are located in each part of the vehicle, close to each load, and serve as terminals. The device constitutes a sub-control device, and the direction in which the unwanted signals are transmitted is from the transmission control circuit section to the reception control circuit section.
1 was unidirectional. Furthermore, the detection signals of each scale sensor that detects the operating state of the engine etc. are also sent (transmitted to the 4 control circuit section, where they are processed and the required :li!I control signal is sent to the wave signal target). In this way, the sender control button 1 circuit section I: J: serves as a central processing unit: IJ is provided in 1-., this: sound discharge C is provided, and conventional Multi-rf <, ') ijj communication system central control method./r.

However, as the electronic control functions of automobiles increase and expand, the amount of information regarding both conditions, including the operating status of the engine, increases. "I" which performs iris processing and signal transmission.
1. There are cases where the ilj control method cannot adequately respond to the 1-1 situation. If the IFj 0 still medium-heated circuit section goes down, the influence on the entire system is large, so in such cases There arises a need to satisfy the system requirement of ensuring at least a minimum operating condition.

Therefore, in this application, a plurality of job units having control capabilities are arranged in a distributed manner at various locations within the moving body, and signals are sent and received between each job unit at appropriate timing to perform the required control. The purpose of this project is to provide a distributed control type multiplex communication device that satisfies the above-mentioned technical requirements. 1. Quickly respond to situations and take appropriate steps regarding transmission operations. This provides a configuration that can take various positions.

In other words, the purpose of the misfire is that each job unit reads the transmission signal of the job unit that is in the process of transmitting, performs the transmission operation in a predetermined order, and mutually sends and receives No. 45 to perform the necessary control processing. In a distributed control type mobile multiplex communication device, if an abnormality occurs in any of the above job units, the subsequent transmission operation of the job unit is stopped and the transmission of the next job unit is performed. The purpose is to cause the job unit to proceed to the transmission operation, thereby ensuring proper transmission operation of the job unit.

A feature of the present invention is that a plurality of job units having predetermined control capabilities such as detecting the state of operating means etc. and driving each electrical load are distributed in various locations on a moving body, and each job unit is In a distributed control type multiplex communication device that performs necessary control by sending and receiving signals at appropriate timings, it monitors the transmission status of each job unit to determine whether it is normal or abnormal, and performs transmission operations when an abnormality occurs. (Management that specifies the job unit that performs the job)・
The reason lies in the fact that the unit was set up.

Below are the drawings of color examples of the present invention. 1
(This will be explained in detail.

In FIG. 1, the block Ag shown by a dashed line represents the body contour of a moving body such as a car, and 'U
't 1 left I in figure! ! l is towards the vehicle body F'rtl, right (1j
Assume that l is at the rear of the vehicle body. Flock A representing a moving object
Above, multiple 2F communication equipment related to unexploded Ricoh, which is a signal transmission system in a mobile unit, is being used in NFW combat.
This clarifies the locations and connections of the control unit and the locations and connections of each load, operating means, detection means, display elements, etc.

Control unit 11.7 jobs unisol l-1, 23
, 4, 5, 6, 7 and one management unit 10
It consists of job units 1 to 7 and a management unit, each of which has a transmitting function and a receiving unit 17 functions. In this way, the control unit is configured in a distributed control type. And as the placement position (dl, job unit 1
tr::t:Right A11] 1 Job unit 2 on the front
/ 'L' side front part, job unit 3 is in the right 1111 center part, IF-Sen 1 center part D, job unit 3 is in the left rear part, job unit 3 is in the center part of the vehicle body. The job unit 7 is disposed near the display section of the driver's seat, and the management unit 10 is disposed approximately in the middle heat section of the vehicle body. The installation position is
The size is determined based on the positional relationship with the connected load, operating means, detecting means, display elements, etc.

In fact, in the multiplex communication device according to the present invention, the dl, signal lines, and power supply threads (i) are wired separately in 1 part, and the signal line 8 uses, for example, an optical fiber to adopt a multiplex transmission method. and
The - side power line 9 connects the power supply line 12 and each unit 1 to 7.10 via a fuse 11. In particular, in job units 1 to 7, the signal detecting means for each object to be detected by punching and the signal interrogating means for the electrical load of each scale are connected to an optical switch, an optical (nirefta) or a spectrometer. The light processing circuit 1!4! is constructed from the element snow.In this embodiment, a multiplex signal using light is used for signal processing as a whole.Therefore, the first In the figure, broken lines (d) consisting of optical fibers mean arched lines;

Now go to jj3 for the functions of each job unit 1-7.

For example, the Eva/Job unit 1 operates the loads such as the lamps 13 and the cooling nozzle 14 on the front right side of the ZIT body by receiving and decoding command signals transmitted from other job units. At the same time, the state of objects to be detected such as a cooling fan switch, a brake fluid switch, a compressor pressure switch, etc. is detected by a detection means 15 consisting of a corresponding sensor and a light switch,
It has a function of transmitting such information as a signal (data) to other job units. Other job unit 2
The configuration and functions of ~7 are also the same as job unit l-1.
, fai (Each job unit operates according to its own blog. However, each job unit has its own load and load depending on the location where it is installed.
・Detection means related to the target to be detected specific to , and furthermore, (d, display element ``Now e I J!!!

Money No Non To Unisol l-10i7h Job Unit 1
It is provided separately for ~7, and Shingata gland 8,
3 connected to the power supply line 9)・unit l□ IQ (0, (+4-shuttle MA 8'S: -7 sent to the shovel unit 1-1 via the signal 6-all This function is used to monitor whether the operating status of the unit 1-1 and 7 is normal or not.

In the drawing, 16, 17 &; J-Right 1i11 of the mobile body
It is the Toa Unit I that controls the front and rear doors of the Toa Unit I, and is under the control of the Job Coninodo 3. Similarly 18.19
is the door unit of the left front and rear doors under the control of job unit 4.

FIG. 2 is a drawing drawn for the purpose of clarifying the system configuration of the multiplex communication device. Each job unit 1 to 7
fd, a signal processing function for issuing operation commands regarding a predetermined load provided on the shaft, and a function for extracting predetermined information from the detected object. and job units 1 to 7,
The management unit 10 is connected by a common signal line 8.
Then, through this prayer line 8, the city shop units 1 to 7,
The transmission and reception of each god's data as described later will take place between the My and -/Nont units 10, respectively. 1. [O1
It is an optical splitter.

Next, with reference to Figures 3 to 6, 1) ij imperial multiple;
17. Data transmission operation of TI 4jI charging. It,'
! ' ] 'J-ru. white), ) figure (-1, data transmission related introductory 1.1X Figure 4 no')] 'J',
Fig. G is an output timing chart of the Iv7 spinning wheel of each job unit.

In Fig. 3, first, when the power is turned on to the system by turning on the switch, job unit 1 (indicated as J U- in the figure) takes the job (JU-).
The command signal and detection information 9) are processed 20) to be output to the signal line 8 (data bus) based on their transmission functions, and the other job units 2 to 7 and the management unit are determined at a time t1. During this fixed period of time, the other job units 2 to 7 and the management unit 10 receive and process the above data, each job unit 2 to 7 controls each item according to a predetermined program, and the other job units 2 to 7 control each item according to a predetermined program. is output to the signal line 8 to monitor the state of the tail. In the next update +a-, data is transmitted via the job unit 2 (denoted as JU-2 in the figure) or the lunar gland 8 (process 21), and the data is sent to the other job unit 1.

3 to 7. Management unit repeats the same operations as described in -. Thereafter, the transmission operation is repeated in the order of job unit 1-3 and job unit 4, and then the process returns to job unit 1, and this process is repeated.

When each process 20.21 is executed, it is determined each time whether the timing of execution 1 is appropriate and whether the output tail is normal (judgment 22.23).

- Through the series of operations of the multiplex communication device as described in
The output timing chart (transmission timing chart) of each job unit 1 to 7 as shown in the figure is generated, and due to the distortion, the transmission data S, ~s7 of each job unit 1 to 7 is displayed on the double old line 8 at a timing such as 24. flows. In Figure 4, Ll is the output (transmission) time, L2
The interval U is the time for input (receiving) and processing, and the sending operation and receiving (d operation) occur exclusively. This is done by monitoring the takes output by job units that are currently in the send state, and by decoding the ordering signals contained in the send take.

In other words, the configuration is such that the next job unit to be subjected to the transmission operation is determined based on this ordered newsletter.Specifically, (σ): the configuration of the transmission data s1 to s7 of each job unit. υ21, As shown in FIG. 5, it consists of a data bit 25, an address bit 26, a data bit 27, a parity bit 28, and a stop bit 29.The stop bit 29 is set to a different frequency for each job unit. Alternatively, the above-mentioned order designation signal can be obtained by forming it with a pulse code.

As described above, the multiplex communication device according to the present invention performs predetermined control by transmitting and receiving signals between the plurality of job units 1 to 7 as distributed control control units disposed in each part of the vehicle body. However, the form of sending and receiving requests is configured so that job units 1 to 7 sequentially repeat it in a loop by reading the transmission signal of the immediately preceding job unit.

Therefore, the system configuration becomes extremely simple, and since the scale of each job can be easily expanded, it is possible to cope with the scale expansion accompanying an increase in functions.

FIG. 6J is a timing chart diagram illustrating all operations of the management unit 10. In the signal line 8, transmission data S, -s7 of each job unit 1 to 7 is originally repeatedly transmitted in a predetermined order, as shown at 24 in FIG. However, as shown in the figure, when an abnormality occurs in the operation of the job unit 2, the management unit, which constantly reads the transmission data s2 of the job unit 2, detects it and outputs a signal group indicating that the job unit 2 is malfunctioning. specifies that the 7 job unit 3 performs the next sending operation (process 30 in Figure 3).
. Thereafter, (d) the transmission operation of the job unit 2 in the failure state is omitted and the transmission operation is repeated in the order specified first!/7 times).

In the above case, the driver is also informed that job unit 1-2 is in failure via the failure display element provided on the instrument panel based on +tq. This is followed by f. j: It is also possible to use other means of reporting.

In the above embodiment, John ″-1-: 1 per piece.
, 7, but this number (4, arbitrary, j1,000σ
Of course, if you change the number according to your needs, you can get seven.

Next, as a technical feature related to the present invention, each of the job units 1 to 7 has a membrane detection means and a rock groove for driving the load, and a management unit job units 1 to 7.
We will outline the internal structure of 7.

In FIG. 7, 31 is a detection means and 32 is a load drive unit, which is arranged at the lower part of the job unit 6. In this embodiment, the detection means 31 are connected in series through optical fibers 38 that transmit wavelength multiplexed signals, and each detection means 31 includes a spectroscopic element (filter).
31d and an optical switch (not shown), the operating state of a predetermined object to be detected can be detected by transmitting or blocking light of a predetermined wavelength by using an optical switch. The load drive Uniso I-32 has a spectroscopic element 32a and a drive circuit 32b built-in, and the spectroscopic element 32a extracts a required signal from the optical fiber 48 to extract electric power from the spot branch line 39, and the drive circuit 32b It operates to supply power to a load 33 such as a lamp via the power supply. In addition, in the figure,
8a is an optical distributor, and 9a is a coupler.0 Figure 8 shows the inside of the management unit 10;
0a is a stabilized power supply circuit, 10b is O/E.

E10 conversion circuit 10C is a control circuit, and logical operations are performed in control circuit 10C. ) Figure 9 shows the inside of the job unisol, 34 is a stabilizing power supply circuit, 35.3
6 (tl, O/E, E10 conversion circuit, 37 (ha!ti control circuit, 40 l: E10 conversion circuit.

Therefore, the logic operation is performed electrically in the control circuit 37, and when transmitted as a word, it is performed in the form of light.

As is clear from the above explanation, according to the present invention, tl, ge,
+9=L For signal transmission and control in a mobile body, we have adopted a multi-use communication method using the distributed control bar 17, in which multiple control shore units send and receive signals to and from each other at appropriate timings and repeat transmission operations in sequence. In addition to easily expanding the scale of the system, it is also possible to quickly deal with the occurrence of abnormalities in each job unit by installing a computer on the side that supervises the transmission operations of the job units. This makes it possible to ensure a minimum constant operating state in the communication system and improve reliability.

The detection means, load, etc. installed on each job unit can be easily added or changed, and the number of job units can also be added or changed, so the system can be improved without major changes. It is possible to quickly and flexibly respond to configuration changes.

Even if a failure occurs in a part of the broken system, the failure part is quickly removed, which reduces the impact on the entire system and maintains high operational reliability.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the arrangement of a multiple communication device according to the present invention in a mobile body, and FIG. 2 is a diagram showing a system of multiple communication devices (
Fig. 3 is a flowchart of Nodame, Fig. 4 is a timing chart related to transmission operation, Fig. 5 is a diagram showing the contents of transmission, Fig. 6 is a management diagram. Timing chart to explain the units 1. Figure 7. Figure 7 shows the structure of the detection means, load, and drive unit of each job unit. Figure 8 shows the structure of the management unit. Figure 9 shows the internal structure of the job unit. FIG. In the drawings, 1 to 7 are control job units; 8; 38 and 48 are signal lines, 9 and 39 are power lines, 10 is a management unit, sI to s7t: J: transmission data of each job unit, t is sending (i'i time, t2 is receiving time. ri'1-Applicant Book "11 Giken Kogyo Co., Ltd. Jj1
Japanese Patent Attorney Shimoguchi” Patent Attorney Inu Overseas Japanese Department Ben J41＾1′ Yu Koyama

Claims (1)

[Claims] A transmitting function is provided at an appropriate location within the moving body, and is equipped with an object to be detected and an electrically unbalanced load, respectively, and a transmission function that outputs a signal generated based on the object to be detected to other job units. A plurality of control job units each having a reception function that drives the electrical load by inputting and decoding signals transmitted from the units and each job unit are commonly connected.7. ), and a management unit that is connected to the signal line and monitors the normality or malfunction of each job unit by inputting the transmission signal of each job unit, and When an abnormality occurs in any job unit during sequential transmission operations based on signal transmission and reception, the management outputs an abnormality detection signal and designates the job unit to perform the next transmission operation. A mobile multiplex communication device characterized by