JPS6150883A - Production control system for automobile - Google Patents

Abstract

PURPOSE:To make something trouble in a battery source findable in an easy manner, by letting an automobile so as to store information of a battery consumption state in memory via a receiver in a production control system. CONSTITUTION:A writing command signal and inherent information out of a higher rank device are transmitted to a communication device 10, which comes into an operational state by starting out of the higher rank device. The communication device receiving this, after being processed with demodulation or the like, houses this inherent information in a data memory part 42 in regular sequence. At this time, the communication device 10 writes voltage information out of a battery check circuit 41 into the specified address of the data memory part 42 via a shift register 43 from the independent standpoint. Afterward, the higher rank device reads out written data out of the communication device 10, and it judges of whether the written result is normal or not, and further judges of whether a battery B inside the communication device 10 is normal or not on the basis of the voltage information together with the check of the inherent information.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a communication system that stores information specific to the workpiece on a workpiece on an automobile production line such as a car body assembly line, a parts assembly line, or a painting line, and transmits the information unique to the workpiece. This invention relates to a manufacturing control system for automobiles in which a host device issues work instructions at a work station based on work-specific information from the communication device inputted via a receiving device installed at the work station. .

[Prior Art] Conventionally, as this type of automobile manufacturing management system, there is one disclosed in, for example, Japanese Patent Application Laid-Open No. 57-209667.

This system is an example of a system used in a painting line, and its basic configuration is shown in FIG. In the figure, inside a painted car body 1 (?I!! painting as a workpiece), vehicle type information of the car body 1,
A communication YiH 10 in which information unique to the car body 1 (hereinafter simply referred to as unique information) such as paint color information and station part information is stored in advance and transmits this stored unique information.
On the other hand, at the work station for the painting process, there is a paint 0 bot 16 and this iH robot 16.
In addition to a color change device 18 for switching the paint supplied to the communication device 10, a receiver 12 for receiving unique information transmitted from the communication device 10 (also has an optical function such as outputting a trigger signal to the communication device 10). is installed. Then, when the vehicle body 1 moves to the work station,
Receives unique information from the communication device 10 attached to the vehicle body 1
! The process pipe 1!11! receives this information from the equipment 12, and this unique 1n information is sent to the higher-level equipment. l1ilt control 14t
One message is sent to a14 (computer). Is this QNI equipment 14 a good receiver? Based on the unique information from the communication device 10 that is manually inputted via the 'ff12, for example, it issues work instructions to the painting robot 1G according to the Φ type, painting area, etc. of the 11 bodies 1, and A work command is given to the change device 18 (to supply paint of a specified color to the coating OIX kit 16. Therefore, the robot only operates according to the work command from the control device 14). 16 and color change device 18 are activated, and the vehicle body 1 is painted in accordance with the color change information stored in the communication device 10.

Here, the specific configuration (M configuration) of the communication device 10 is as shown in FIG. 6, for example. A data storage section 22 consisting of a memory etc. receives a trigger signal (
For example, when receiving an infrared ray, the battery B is supplied to each circuit inside the device, and from then on, power is supplied to each @ path in synchronization with a predetermined timing pulse from a timing signal generation circuit 24, which will be described later. Trigger circuit 24 fL 1 ~ Generates a timing signal that divides the frequency of the oscillation signal from the base optical oscillator circuit 25 upon activation from the trigger circuit 22 and outputs a predetermined operation timing pulse to each circuit inside the device. It is a circuit. Then, when receiving the trigger signal from the receiver 0!12, the data signal generating circuit 26 reads the unique information for the vehicle body 1 from the data storage section 21 in synchronization with the timing pulse from the timing signal generating circuit 24. Data (number 8) corresponding to this unique information is created, and this data (number 9) is modulated by the output circuit 27 and sent to the receiving device 12 via the photodiode 28. While the trigger time λ゛a22 is operating!I!JJ, that is, while the communication device 10 is operating, the TI light emitting guide A indicates the operating state.
- The two lights are now lit.

On the other hand, since it is attached to the 10 bodies 1 etc. by the 8-piece installation 10 and is always connected to the IP! When battery B is exhausted, I is
In addition to the above-described circuits 1i and j, the communication device 10 is conventionally provided with a battery single circuit 30. This battery check circuit 30 is, for example, always +1'! If the current from the battery B is caused to flow through the reference resistance, and the voltage drop across the reference resistance is greater than a predetermined value C, that is,
If the battery BTi pressure is normal, turn on the check switch 31 l:X? , the light emitting diode 32 and the like are turned on when the light emitting diode 32 is created. Therefore, the consumption of the battery B can be easily determined by the probability Σ of the light-emitting diode 32 lighting up when the check switch 31 is turned on.

[The invention solved the problem.]However, in an automobile manufacturing line, the above-mentioned communication devices are installed and a large number of workpieces are moved, and each communication As a practical matter, it is very cumbersome for an operator to check the consumption status of the battery B by pressing the above-mentioned check switch on the device one by one. For example, even if you regularly perform the &1i verification, since the verification is not done in real time, there is a possibility that some kind of failure (such as the
If this occurs, the discovery of battery B power supply abnormality will be delayed and the system will not be stable.

[Means for solving the problem 1 + Invention t, 1. In view of the above problems, an automobile manufacturing management system is provided in which an abnormality in the battery power supply of a communication device installed in a workpiece can be easily and timely discovered. The purpose is to provide a raccoon system, and in order to achieve this purpose, a communication system that is attached to a workpiece on an automobile production line, operates by power supply from a battery, and transmits pre-stored information specific to the workpiece. a receiving device that is provided in a work station and receives work-specific information transmitted from the communication device; and a receiving device that receives work-specific information transmitted from the communication device; In an automobile manufacturing management system having a host device that issues work instructions, the communication device transmits the battery condition status 1rJ information to the above-mentioned receiver f.
(Information transmitted to higher-level device via l device) ヱiJ 11
This is done by providing a storage means to store the information as an example.

[Embodiments of the Invention] Hereinafter, actual examples of the present invention M1! 41 on the drawing 2. Please follow the instructions 1
I will clarify.

The basic system configuration is the same as that shown in FIG. 5, taking a painting line as an example. here,
The specific structure of Tsushin's J110, which is attached to the vehicle body 1, is shown in FIG. 1, for example. In the figure, reference numeral 41 denotes a battery check circuit that constantly inputs the output voltage from battery B and outputs the voltage of the person as encoded voltage information, and 42 (also unique information of the vehicle body 1 in FIG. 5, That is, vehicle type information, paint color information, paint part information, etc. are stored in advance, and voltage information of battery B from the battery check circuit 41 is stored in a predetermined area (address) via a shift register 43, which will be described later. The data storage unit (R
AM), and the shift register 43 sequentially stores the voltage information serially outputted from the battery check circuit 4 in synchronization with a predetermined timing pulse from the timing generation circuit 24. The pressure information is sequentially stored at specified addresses in the data storage e1142.

In addition, the trigger signal from the HH1112 is inputted to the IC receiver in FIG. 5 through the photodetector diode 23.
The trigger circuit 22 supplies battery B power to each circuit in the narrow stomach (excluding the battery check circuit 41) and controls the power supply to each circuit thereafter. 25
A timing signal generating circuit 24 which divides the frequency of an oscillation signal from the oscillation signal and outputs a predetermined timing pulse to each circuit in the device is approximately the same as the conventional circuit shown in FIG. Then, when receiving the trigger signal from the receiving (Fi!!
At the same time as reading out the fixed Ti information and voltage information from r5 to 1, a data signal corresponding to the fixed i information and voltage information is created, and the output circuit 27 modulates this data signal and outputs it to the light emitting diode. 28 to the receiving device 12. Furthermore, in this device, the sixth
Similar to the conventional lamp shown in the figure, two light emitting diodes are provided which light up while the communication device 10 is in operation.

Next, what process will become the upper level equipment? 1 Immediate it, II II
The operation of the stomach filling 14 will be explained based on the flowchart shown in FIG.

When a read command is output from the control device 14, a trigger signal is output from the reception 'A iff 12 in response to this read command, and this trigger transmits data transmitted from the communication device 10 activated by the signal, that is, The unique information and voltage information stored in the data storage section 42 are input to the controller 1114 via the receiving device 12.

When the data is transmitted in this way, the control device 14 takes the data into the internal memory, detects general error codes, etc., and reads the above data stored at a predetermined address in the internal memory. di I for transmission data
Check the information on Jruden 1F and check whether battery B in line 10 is normal or not. Regarding this determination, for example, on the control 211 R edict 14 side, the third
As shown in the figure, the communication device 10 has information on a predetermined voltage vth11'i (2) much larger than the lower limit battery B voltage vIlli11 (2) (ΔV) for normal operation, and the predetermined voltage information vth and transmission data Voltage information V on J5
When the voltage information V becomes equal to or less than the predetermined voltage information vth, it is determined that the battery B is abnormal.

In the judgment of the above baggage B, it is normal and it is judged as 'rut'.
Juru (V>Vth) (!:, aill12111ffl
14 LtAs before, 351 fi is assigned to the relevant work station based on the unique information included in the transmitted data.
! Shita Nuriha [1 bot 1-56 and color change H
Issue a work command to fQ 18 (normal processing). On the other hand, if it is determined that battery B is abnormal (■≦Vth), an alarm signal will be output to a kidney reporting device (not shown) installed at the work station, etc., and a temporary The above transmission data (specific information 9) 2) stored in the internal memory is saved. When replacing the communication device 10 that has been found to be defective due to the operation of the alarm device that is activated in the 13th period, the above-mentioned Lll iλ11 is applied to the data rl 'a R11 of the new communication device. Data stored in the device 14 (
Unique information) to ensure that it does not cause problems in subsequent processes.

FIG. 4 is a timing chart showing the operation of the upper 'j1g'++'l when writing unique information of the vehicle body 1 to which the communication device 10 is to be attached to the data storage unit 41 of the communication Rffi 10. In this case, even if we assume that the host device is a write-only machine for the first stage of the production line, it is also possible to write unique information to the new communication terminal 8 when a battery B abnormality is detected as described above. A11! It may be assumed that the control device 14 is used. Furthermore, the first
In the communication device 10 shown in the figure, although means for writing unique information are not specifically shown, it is capable of receiving and demodulating data from a host device, data control for the data storage unit/11, and address control. It is assumed that general processing such as Il is performed.

The device is activated by activation from a higher-level device (corresponding to the trigger signal from the receiving old I2) (the unique information to be occupied is transmitted from the higher-level device to the H device 10 along with a write command signal. After receiving the transmitted specific information 411 and performing processing such as demodulation, the communication device 10 sequentially stores the specific information 411 in the data storage unit 42. At this time, the communication device 10 performs a battery check on its own. circuit 4
The voltage information from 1 is sequentially written into predetermined addresses of the data storage section 42 via the shift register 43. after that,
The host device outputs the captured data from the communication device 1061 + and determines whether the writing R1 Song is normal or not.
In this 711 determination, it is determined whether or not the battery B in the battery 10 is normal based on the battery voltage information as well as checking the unique information.

In the process of judging the write results above, if the round-up results are abnormal (mismatch between store-in data and read data),
It outputs an alarm signal indicating that the communication device 10 is in error, and also issues a command to replace the communication device 10. Also, battery B 5
Even when it is determined that the battery is low (≦Vth), an alarm signal indicating that the battery is exhausted is output, and a replacement command for the communication device 1o is issued.

It should be noted that only when it is determined that everything is normal in the process of determining the write results above, the host device performs the subsequent predetermined normal processing i). Then, data (hard information) is captured again in the same way as described above for the new companion outfit d exchanged based on the exchange command from the communication device 10 as described above.

As described above, according to this embodiment, the voltage information of the battery B in the communication device d1Q is stored in the data storage unit 41 every time the communication device 10 is activated from the host device. is the above-mentioned voltage cutoff H1 at its startup fO.
Based on this, it becomes possible to recognize a battery abnormality in the communication device 10.

In this embodiment, the voltage information of battery B is stored, and based on this voltage information, the abnormality of battery B is determined according to the characteristics shown in FIG. I tried to do this, but as I followed, for example,
The battery check circuit may determine whether the voltage V of the battery B is equal to or less than Vmin in FIG. 3, and when this determination is made, a flag may be set at a predetermined address in the data storage section. In this case, it is sufficient to determine whether or not the battery is B by checking the presence or absence of the flag in the host device (, 1).

Furthermore, although the above embodiments have been explained using a painting line as an example, it is a matter of enthusiasm that the present invention can be applied to all other manufacturing lines such as vehicle body assembly lines and parts assembly lines.

[Effect of R light] According to the present invention, according to the present invention, automatic t1! A communication 'Ail' installed on a workpiece on the production line.
'J, top i! battery purchasing information! Since information is stored as being able to transmit information to the communication device, abnormalities in the communication device can be easily and timely detected, making it possible to further unmanned operation. This makes it possible to realize a high-speed automobile production line.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a communication device used in the automatic %71ffi management system according to the present invention, FIG. Fig. 3 is a graph showing the opening of the battery check, and Fig. 11 is a graph showing the opening of the battery check. F121 showing the operation of the host device when entering iξ
54!5 is an explanatory diagram showing an example of a manufacturing control system in the painting process, and FIG. 6 is a block diagram showing an example of two devices used in a conventional automobile manufacturing control system. It is a diagram. 1...Vehicle body 10...Communication device 12...Receiver (8 German stomach 14...Control narrow purchase (upper device) 16...ΦGerman robot 18...Colorage 1 engine device 22... Trigger circuit 24...Timing signal generation circuit 26...Data signal generation circuit 27...Output circuit 41...Battery check circuit 42...Data storage section 43...Shift register Special applicant Nissan Motor Co., Ltd. Co., Ltd.Figure 2Figure 3・Figure 1Figure 5

Claims (1)

[Claims] A communication device is attached to a workpiece on an automobile production line, operates by power supply from a battery, and transmits pre-stored information unique to the workpiece, and a communication device installed at a work station and transmits information unique to the workpiece from the communication device. In an automobile manufacturing management system comprising a receiving device that receives information on the workpiece, and a host device that issues work instructions at the work station based on the work-specific information input via the receiving device, the communication device An automobile manufacturing management system, further comprising a storage means for storing battery consumption state information as information that can be transmitted to a host device via the receiving device.