JPS61278239A - Check device - Google Patents

Abstract

PURPOSE:To attain quick and efficient check by including a logical operation processing based on the state of an operation switch, a detection switch and other sensors and an output display processing to all processing programs. CONSTITUTION:The logical operation and display processing are performed by a logical operation processing program 72a and a display processing program 72b of a storage section 72 based on the state of the operation switch driving a load of a node unit via the said node unit designated by the operation switch of an operation section 73, a detection switch and a sensor or the like and the result is displayed on a display section 74. Then all processings of each node unit are given in the check device 50. Thus, the check of output functions of an optional node unit is attained efficiently without changing the connecting point connecting the check device 50 to the transmission system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inspection device for a digital multiplex transmission system, and more particularly to display output processing of an inspection device for a digital multiplex transmission system for automobiles.

[Prior art]

In explaining a conventional inspection device for a digital multiplex transmission system in an automobile, we will first take up a portion of the electric circuit of the automobile and explain the main points of digital multiplex transmission.

FIG. 3 is a circuit diagram showing the electrical systems of the automobile's light system and air conditioning system. In the figure, 11 is a radiator fan motor, which is activated by turning on a radiator thermo detection switch 12, and a cooler pressure detection switch 13 for cooling monitoring;
It operates by turning on the cooler thermo detection switch 14 for monitoring overcooling of the evaporator, the cooler switch 15 for operating the air conditioner, and the proa switch 16 for operating the blower motor. Reference numeral 17 denotes a magnetic clutch for the cooler, which is activated when the four cooler pressure detection switch 13, cooler thermodetection switch 14, cooler switch 15, and proa switch 16 are turned on, and connects the cooler compressor to the engine. A diode 18 is used to prevent the magnetic clutch 17 from operating when the radiator thermodetection switch 12 is ON.

19 is the cooler pilot lamp, cooler switch 15
turns on when the proa switch 16 is turned on to indicate that the air conditioner is operating, and the tara pilot lamp 1 lights up to indicate that the air conditioner is operating.
9 is on, the cooler pressure detection switch 13 and the cooler thermo detection switch 14 continue to energize the magnetic clutch 17 to generate cold air as long as the refrigerant pressure is within the limit and the evaporator is not in a supercooled state. Reference numeral 20 denotes a blower motor for blowing air, and the blower motor 20 is operated by operating the blower switch 16. In reality, the proar motor 20 is often controlled in several stages from a strong wind to a light breeze, but in this example, it is simplified to only - number of proar switches 16. Reference numeral 21 denotes a key switch, and the operation of the radiator fan motor 11, magnetic clutch 17, propeller motor 20, and tarla pilot lamp 19 is prohibited by the key switch 21. Further, the key switch 21 actually includes contacts for turning on the accessory, turning on the starter, etc., but these are omitted here for simplification.

22, 23, and 24 are a high beam pilot lamp, a right high beam headlight, and a left high beam headlight, respectively. Lights up when the switch is turned on. The dimmer switch 28 turns on the right low beam headlight 29 and the left low beam headlight 30, respectively, by switching the high beam and low beam of the headlights and turning them on to the low beam side.

31 and 32 are a meter panel lighting lamp and a license lighting lamp of the dash board, respectively, and the lighting switch 3 is interlocked with the lighting switch 26.
It lights up when the small light side 37 or the headlight side 38 of No. 3 is turned on. The meter panel illumination lamp 31 is actually composed of several pieces, and the license illumination lamp 32 is composed of two pieces on the left and right sides. 34 and 35 are side lights and tail lights that can each be configured with two left and right lights, and can be turned on by turning on the parking light 36 or by turning on the small light side 37 and headlight side 38 of the lighting switch 33.
The light can be turned off by turning on.

A battery 39 supplies power to the circuit. In addition,
In FIG. 3, fuses, battery charging circuits, etc. are omitted.

FIG. 4 is a block diagram showing a transmission system in which the operation switch, detection switch, and full load control system using the circuit shown in FIG. 3 are digitally multiplexed using four node units and a loop network. In the figure, parts given the same reference numerals as those in FIG. 3 indicate the same or equivalent parts. 40 is a transmission line for multiplexed signals; 41, 42, 43, and 44 are node units disposed in each section of the automobile; each of the node units 41 to 44 is connected in a loop through the transmission line 40. The node unit 41 and node unit 42 are placed on the right and left of the engine room, respectively, and the node unit 43 and node unit 44 are placed on the right and left of the room, respectively. The signals from the operation switches and detection switches shown in FIG.

In addition, in the figure, 34a and 34b represent a right side light and a left side light, respectively, 32a and 32b represent a right license light and a left license light, respectively, and 35a and 35b represent a right tail light and a left tail light, respectively. , 61 and 62 indicate a small light switch and a headlight switch, respectively.

In the above multiplex transmission system, details of the communication method are omitted, but each node unit 41 to 44 transmits the input 0N10FF information of the switch in bit serial,
The switch information necessary for each drive load is taken in from the transmission line 40, and the following logical processing corresponding to the logic of the switch states shown in FIG. 3 is performed to drive each load.

In the node unit 41, right high beam headlight 22 = passing switch 2
5 + headlight switch 62 x daymer switch 28
......(1) Right low beam headlight 29 - Headlight switch 62X Daymer switch 28... (2) Right side light 34a = Parking switch 36 + Small light switch 61+
Heradolite switch 62...
... (3) Radiator fan motor 11 - (radiator thermo detection switch 12 + Tara pressure detection switch 1
3 + Cooler thermo detection switch 14 + Cooler switch 1
5 + professional switch 16) x key switch 21
...(4) Node unit 42
In the case, left high beam headlight 24! Passing light switch 25 + Headlight switch 62 x Daymer switch 2B ...... (5) Left low beam headlight 30 - Headlight switch 62X Daymer switch 28... (6) Left side light 34b = Passing Switch 25 + Small light switch 61 + Head light switch 62 ...
・(7) Magnetic clutch 17 = (Cooler pressure detection switch 13 x Cooler thermo detection switch 14 x Tara switch 15 x Proa switch 16) x Key switch 21
(8) Right license light 32a - small light switch 61 + head light switch 62 (9) Right tail light 35a - passing switch 25 + small light switch 61 + head light switch 62
(10) Meter panel illumination lamp 31 small light switch 61 + headlight switch 62 (11) Cooler pilot lamp 19 snow (cooler switch 15 x
Proa switch 16) x key switch 21
......(12) High beam pilot lamp 22 - passing switch 25 + headlight switch 62X daymer switch 28
(13) In the node unit 44, left license light 32b = small light switch 6
1 + Head light switch 62 (14) Left tail light 35b - Passing switch 25 + Small light switch 61 + Head light switch 62
・・・・・・(15) Blower motor 2
0 = Pro switch 16 x Key switch 21
(16) Each of the four node units 41 to 44 drives the load through the logic processing in (1) to (16) above, thereby achieving the same operation as the circuit in FIG. 3. be able to. However, in FIG. 4, the power supply line is omitted for simplicity.

Further, in FIG. 4, reference numeral 50 denotes an inspection device, which is connected to any of the inspection device connection terminals 52, 53, 54, and 55 of each of the node units 41 to 44 through a cable 51 to inspect the system.

FIG. 5 is a flowchart showing the operation of the inspection device 50 according to a conventional method. When the inspection device 50 is connected to the loop formed by the transmission line via the node units 41 to 44, the signals sent from each node unit according to a predetermined communication method are received on the loop through the reception process in step 210. The transmission signal from each of the node units 41 to 44 is received and transferred to the reception buffer memory. Next, in the editing process of step 220, the node units 41 to 44
Processing such as integrating data from each node unit 41 to 44, extracting input signals, and converting formats is performed on the contents of the receive buffer, which also contains signals for communication control, and output for display. Transfer to buffer memory.

In the input signal display process of step 230, bit allocation of output buffer data and 0N10FF control are performed for the peripheral interface output latch circuit directly connected to the driver that drives the display.

FIG. 6 is a flowchart showing details of the operation of the input signal display processing in step 230.

They are provided corresponding to input signals, that is, all operation and detection switches of each node unit 41 to 44. The following steps 231 to 2 are performed for the output latch circuit for the display device.
Through the determination process 41, set-lit control is performed in accordance with all switch input signals of the output buffer.

In step 231, it is determined whether the cooler pressure detection switch 13 is ON or not. If it is ON, the output latch of the cooler pressure detection switch is set, and if it is OFF, the output latch is reset. Next, in step 232, it is determined whether the cooler thermo detection switch 14 is ON or not. If it is ON, the cooler thermo detection switch output latch is set, and if it is OFF, the output latch is reset. Subsequently, in step 233, it is determined whether or not the radiator thermodetection switch 12 is ON. If it is ON, the radiator thermodetection switch output latch is set, and if it is OFF, the output latch is reset. Then step 2
34, it is determined whether the small light switch 37 is ON or not, and if it is ON, the small light switch output latch is set, and if it is OFF, the output latch is reset. Next, in step 235, it is determined whether the headlight switch 38 is ON or not, and if it is ON, the headlight switch output latch is set and the headlight switch 38 is turned OFF.
If so, reset the output latch. Subsequently, in step 236, it is determined whether the passing switch 25 is ON or not. If it is ON, the passing switch output latch is set, and if it is OFF, the output latch is reset. In step 237, it is determined whether the dimmer switch 28 is ON or not. If it is ON, the dimmer switch output latch is set, and if it is OFF, the output latch is reset. Next, in step 238, it is determined whether the parking switch 36 is -ON, and the parking switch 36 is turned ON.
If it is N, set the parking switch output latch, and if it is OFF, reset the output latch. Next, in step 239, it is determined whether the cooler switch 15 is ON or not. If it is ON, the cooler switch output latch is set, and if it is OFF, the output latch is reset. Subsequently, in step 240, it is determined whether the proa switch 16 is ON or not. If it is ON, the proa switch output latch is set, and if it is OFF, the output latch is reset. Next, in step 241, it is determined whether the key switch 21 is ON or not. If it is ON, the key switch output latch is set, and if it is OFF, the output latch is reset. By processing as described above, it is possible to check all input switch signals on the multiplexed transmission loop system.

[Problem that the invention seeks to solve]

However, with inspection equipment that performs the above processing, it is possible to monitor input switch signals, but for loads such as motors and lamps, a large number of input signals are processed and output, and the processing cannot be performed for each load. Since the contents are different, when a fault occurs in the load operation, it is not easy to analyze the fault only from the input switch signal, and it is extremely inefficient.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide an inspection device for a digital multiplex transmission system that eliminates the above-mentioned conventional drawbacks and enables quick and efficient inspection work.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides an inspection device for a digital multiplex transmission system in which a plurality of node units are connected in a loop through a transmission line. All logical operation processing and output display processing based on the states of operation switches, detection switches, other sensors, etc. to be operated are included in the processing program of the inspection device, and a switch for specifying an arbitrary node unit and each node unit are driven. By mounting a display corresponding to the load, it is possible to execute all output functions of the node units that make up the system.

[Effect]

By configuring the inspection device as described above, the inspection device can perform all the output functions of the node units that make up the system, making it possible to perform quick and efficient inspection work without the above-mentioned conventional drawbacks. Become.

[Embodiment] An embodiment of the present invention will be described below in detail based on the drawings.

FIG. 1 is a flowchart showing the operation flow of the inspection device according to the present invention, and FIG. 2 is a flowchart showing details of the display processing of the node unit 41 (see FIG. 4).

In FIG. 1, the receiving process in step 101 and the editing process in step 102 are similar to the conventional receiving process and editing process shown in FIG. However, at the operation switch input in step 103, the state of the node unit designation switch provided on the operation panel is read, and by branching in steps 110, 112, 114, and 116, the following output of the node unit designated by the node unit designation switch is performed. Performs logic and display processing.

In the step 110, it is determined whether the node unit is the node unit 41 or not, and if the node unit is the node unit 41, step 1 is performed.
At step 20, output logic processing of the node unit 41 is performed, and then at step 130, display processing of the node unit 41 is performed. In step 110, if the node unit is not the node unit 41, then in step 112 it is determined whether the node unit is the node unit 42, and if it is the node unit 42, the output logic processing of the node unit 42 is performed in step 122, and then in step 140. Display processing of the node unit 42 is performed. In step 112, if it is not the node unit 42, it is determined in step 114 whether it is the node unit 43. If it is the node unit 43, output logic processing of the node-unit 43 is performed in step 124, and then in step 150, it is determined whether the node unit 43 is the node unit 43. Display processing of the unit 43 is performed. If the node unit 43 is not the node unit 43 in step 114, it is determined in step 116 whether or not the node unit 44 is the node unit 44.
If so, output logic processing of the node unit 44 is performed in step 126, and then display processing of the node unit 44 is performed in step 160. Also, the step 116
, if the node unit is not 44, step 1
At 70, input signal display processing is performed.

That is, in the output logic processing of each node unit in steps 120, 122, 124, and 126, the above logic formula (1
) to (4), (5) to (8).

Logical operations corresponding to the drive load based on (9) to (13) and (14) to (16) are performed.

Further, in the display processing of each node unit in steps 130, 140, 150, and 160, output buffer data is allocated and 0N10FF control is performed for the display device provided corresponding to the load of each node unit. In the input signal display process of step 170, when the node unit is not designated by the node unit designation switch, the input signal corresponding to the operation and the state of the detection switch is displayed and output as in the conventional case.

FIG. 2 is a flowchart showing details of the display processing (step 130) of the node unit 41. As shown in the figure, in step 131, the right high beam headlight 23 is turned on by the determination process of the logical formula (1).
If it is ON, it sets the output latch for the right high beam headlight, and if it is OFF, it resets the output latch. In step 132, it is determined whether the right low beam headlight 29 is ON or not by the determination process of the logical formula (2), and if it is ON, the output latch of the right low beam headlight is set and the OF
If F, the output latch is reset. Next, in step 133, it is determined whether the right side light 34a is ON or not by the determination process of the logical formula (3), and if it is ON, the output latch of the right side light 34a is set, and if it is OFF, the output latch is set. Reset the latch. Next, in step 134, it is determined whether the radiator fan motor 11 is ON or not by the determination process of the logical formula (4), and if it is ON, the output latch of the radiator fan motor is set, and if it is 0FF, the output latch is set. Reset.

That is, steps are performed for each output latch circuit that drives the display devices provided corresponding to the right high beam headlight 23, right low beam headlight 29, right side light 34a, and radiator fan motor 11 driven by the node unit 41. Through the determination processes 131, 132, 133, and 134, the set/reset is controlled based on the results of the logical operations of the logical formulas (1) to (4) in step 120 of FIG. The above processing is also performed when other node units 42 to 44 are designated by the node unit designation switch.

FIG. 7 is a diagram showing an example of the configuration of an inspection device that performs the processes shown in the flowcharts of FIGS. 1 and 2 above. In the figure, 71 is a central processing unit that controls each part of the inspection device, and 72 is a central processing unit that causes the central processing unit 71 to perform logical operation processing based on the states of operation switches, detection switches, sensors, etc. that drive the loads of all node units. 73 is a storage section in which various programs such as a display processing program 72b for performing display processing are stored. 73 is an operation section equipped with operation switches for specifying each of the node units 41 to 44. 74 is an operation section for each of the node units 41 to 44. a display section 75 including a display corresponding to the load driven by the node unit;
is the input interface, 76 is the output interface, 77
is a serial signal receiving module 7 that receives a bit serial signal from the transmission path 40 via a node unit.
8 is an input/output interface that connects the node unit and the central processing unit, and 79 is a serial signal transmission module that sends a bit serial signal to the transmission line via the node unit.

An operation that drives the load of the node unit through the node unit specified by the operation switch of the operation section 73.
Based on the states of the operation switch, detection switch, sensor, etc., the logical operation processing program 72a and the display processing program 72b in the storage section 72 perform the logical operation and display processing as shown in the above logical formulas (1) to (16). It is displayed on the display section 74.

According to the above embodiment, since the inspection device 50 is responsible for all the output processing of each of the node units 41 to 44, any node unit can be It becomes possible to efficiently check the output function of the For example, the node unit 41
If the radiator fan motor 11 driven by the radiator fan motor 11 is inoperable and there is no abnormality in the motor itself, since the radiator fan motor 11 operates logically using five switches as described above, the input switch signal is By only monitoring, it cannot be determined whether the cause of the non-operation is due to the input signal or the drive system, unless the logic of the above-mentioned logical formula (4) is referred to. However, in general, the total number of loads such as lamps, motors, solenoids, and other actuators in an automobile often exceeds 100 points, and it is inefficient to refer to the above-mentioned logical formula each time. It is necessary to secure personnel with specialized knowledge. In contrast, the inspection device 5 of the above embodiment
According to 0, by checking the status of the display corresponding to the abnormal load, if there is no abnormality displayed on the display, it is a problem on the output side of the node unit, and the abnormality is detected as well as the actual load. In this case, it can be easily determined that there is a problem with the input signal system consisting of the related switch, the node unit into which the switch signal is input, and the transmission line. Therefore, inspection work on a digital multiplex transmission system can be carried out quickly and efficiently without requiring specialized knowledge.

〔Effect of the invention〕

As explained above, according to the present invention, the inspection device includes all logical operation processing and output display processing based on the states of operation switches, detection switches, other sensors, etc. in the processing program of the inspection device, and also By implementing a switch to specify the unit and an indicator corresponding to the load driven by each node unit, all the output functions of the node units that make up the system can be executed, so it is quick and easy to use without the above-mentioned drawbacks of the conventional system. Moreover, an inspection device for a digital multiplex transmission system capable of efficient inspection work can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the operation flow of the inspection device according to the present invention, FIG. 2 is a flowchart showing the flow of display processing of the node unit, FIG. 3 is a partial circuit diagram of the electrical system of the automobile, and FIG. FIG. 6 is a flowchart showing the flow of the operation of the conventional inspection device, FIG. 6 is a flowchart showing the flow of input signal display processing, and FIG. 7 is a diagram showing an example of the configuration of the inspection device according to the present invention. In the figure, 40... transmission line, 41, 42, 43, 44...
- Node unit, 50... Inspection device, 71... Central processing unit, 72... Storage section, 73... Operation section, 7
4...Display section, 75...Input interface, 76
... Output interface, 77... Serial signal receiving module, 78... Input/output interface, 7
9... Serial signal transmission module.

Claims (1)

[Claims] In an inspection device for a digital multiplex transmission system in which a plurality of node units are connected in a loop through a transmission path, the inspection device is equipped with operation switches, detection switches, other sensors, etc. that drive the loads of all the node units that make up the system. All logical operation processing and output display processing based on the state are included in the processing program of the inspection device, and a switch for specifying any node unit and a display corresponding to the load driven by each node unit are installed. An inspection device featuring: