JPS63184577A - Specification monitoring device for commodity - Google Patents

Abstract

PURPOSE:To facilitate classified reception of respective specification information even when a commodity approaches closely, in a commodity specification monitoring device comprising mobile transmitters provided for respective commodities and a fixed receiver for reading out specification information of commodity being transmitted from said transmitters, by providing identification codes on respective mobile transmitters. CONSTITUTION:When a receiving means 31 in a mobile transmitter 30 fixed to each commodity receives a read-out command from a fixed receiver 20, specification information stored in a memory means 33 is read out by a read-out means 32 and transmitted through a transmitting means 34. Here, a means 36 for holding predetermined identification codes in the device 30 and a confirming means 35 for matching said identification code with another identification code fed from a second transmitting means 19 in the fixed receiver 20 and allowing read-out of specification information upon matching of them are provided in the transmitting means 34. The transmitting means 34 is controlled to be disabled by a stopping means 38 when a detecting means 37 detects that other mobile transmitters 30a, 30b are transmitting specification information.

Description

[Detailed Description of the Invention] (Field of Industrial Application) ゛ This invention relates to a mobile communication device attached to each of a plurality of articles, and specification information of the articles transmitted from these mobile communication devices via electromagnetic waves. The present invention relates to an article specification management system equipped with a fixed communication device that reads the information.

(Prior Art) As a conventional article specification management device, there is one shown in FIG. 5, for example.

Reference numeral 10 denotes a mobile communication device, which is hooked to a predetermined position of each vehicle body put on the automobile production line. The configuration of this mobile communication device will be explained below.

Reference numeral 2 denotes an antenna section, which receives a read command RC arriving from a fixed communication device 1, which will be described later, via electromagnetic waves of a predetermined frequency. 3 is an AD conversion circuit that amplifies the weak read command RC received by the antenna section 2, detects the amplified signal, and performs AD conversion; 4 is a read command RC present in the digital signal from the AD conversion circuit 3; It is a decoder that deciphers whether or not. This decoder 4 is an AD conversion circuit 3
When a read command RC in a digital signal from the memory is decoded, a read signal R is output to a memory operation circuit 5, which will be described later. Reference numeral 6 denotes a RAM in which specification information SD (model, standard, serial number, production history, etc.) unique to the vehicle body is stored in advance. When the memory operation circuit 5 receives the read signal R from the decoder 4, it reads out the specification information SD specific to the vehicle body from the RAM 6, and outputs the specification information SD to a DA conversion circuit 7, which will be described later. 7 is the above-mentioned DA conversion circuit 7, which converts the vehicle body-specific specification information SD in the digital value from the memory operation circuit 5 into DA, modulates it with a high frequency signal of a predetermined frequency f, for example, by the PCM method, and modulates the modulated data. The signal SDI is transmitted via the antenna section 2.

On the other hand, reference numeral 1 denotes the fixed communication device, which is installed at each work station on the production line, and receives vehicle body-specific specification information SD from the mobile communication device 1 via electromagnetic waves as a reply to the read command RC. The modulated signal SDI is received, and work commands at each work station are output to a robot or the like (not shown) based on vehicle body specific specification information SD included in the modulated signal SDI.

(Problems to be Solved by the Invention) However, such conventional product specification management devices are configured to transmit product specification information from a mobile communication device via electromagnetic waves of a single frequency. Therefore, when articles equipped with mobile communication devices must be placed close to each other, the fixed communication device selects the specification information from the desired mobile communication device among the multiple specification information received from each mobile communication device. There was a problem in that it was not possible to receive it separately from others.

Therefore, as already proposed by the inventor of the present application, an identification code is set in advance for each mobile communication device, and the fixed communication device can identify each mobile communication device by transmitting the identification code of the desired mobile communication device. Invention that differentiates
〇-285668) can be applied, but
Even with this method, the number of types of identification codes that can be set is limited, so as the number of items to be managed increases, it may become necessary to use the same identification code more than once. cannot be resolved.

The present invention has been made by focusing on such conventional problems, and an object thereof is to provide an article specification management device that can distinguish and receive specification information of each article even when the articles are close to each other. shall be.

[Means for solving problems]

In order to achieve this object, the present invention has a fixed communication device that transmits a read command via electromagnetic waves and receives product-specific specification information that arrives via electromagnetic waves. , a storage means that stores product-specific specification information in advance, a reception means that receives a read command transmitted from the fixed communication device via electromagnetic waves, and a receiver that decodes the read command and reads the product-specific specifications from the storage means. An article specification management device comprising a reading means for reading information and a transmitting means for transmitting article-specific specification information read by the reading means via electromagnetic waves, and configured by a mobile communication device attached to the article. The fixed communication device is provided with a second transmission means for transmitting a predetermined identification code to each of the mobile communication devices together with the readout command, while the readout means of the mobile communication device is provided with a second transmission means for transmitting a predetermined identification code to each of the mobile communication devices. An identification code holding means that holds a predetermined identification code, and when receiving an identification code from a fixed communication device via the receiving means, whether the identification code and the identification code held by the identification code holding means match. and, if a match is confirmed, confirming whether the article-specific specification information is read from the storage means, and whether the other mobile communication device is transmitting the article-specific specification information. a detection means for detecting the transmission means; and a stop means for stopping the operation of the transmission means when the detection means is detecting, and releasing the stoppage of the operation of the transmission means when the detection means is not sensing. We decided to set it up.

(Operation) Next, the present invention will be explained in detail based on the claim correspondence diagram shown in FIG.

The second transmitting means 19 of the fixed communication device 20 transmits the read command RC via electromagnetic waves and also transmits a predetermined identification code ID to the desired mobile communication device 30.

On the other hand, the receiving means 31 of the mobile communication device 30 receives the read command RC and the identification information ID from the fixed communication device 20. Then, the reading means 32 of the mobile communication device 30 decodes the reading command RC. Next, the checking means 35 checks whether the identification code ID held by the identification code holding means 36 and the identification code ID received from the fixed communication device 20 via the receiving means 31 match. Therefore, confirmation means 35
After confirming that the identification codes ID match, the CPU 30 permits reading of the article-specific specification information SD from the storage means 33. Then, the reading means 32 reads out the article-specific specification information SD from the storage means 33. And mobile communication means 30
The transmitting means 34 transmits the specification information SD from the reading means 32 via electromagnetic waves.

However, if the detection means 37 of the mobile communication device 30 detects that the other mobile communication devices 30a, 30b, etc. have already transmitted the specification information SD, the stop means 38 of the mobile communication device 30 stop operating. and,
If the detection means 37 of the mobile communication device 30 detects that the other mobile communication devices 30a, 30b, etc. are not transmitting the specification information SD, the stop means 38 of the mobile communication device 30 stops the transmission means 34. release.

Therefore, the fixed communication device 20 can receive only the specification information SD from the desired mobile communication transmission 30.

〔Example〕

Embodiments of the present invention will be described below using an automobile production line as an example.

The basic configuration of an automobile production line is shown in Figure 2. 11 is a conveyor driven at a predetermined speed in the direction of the arrow by a power motor (not shown) or the like.

12. 12a, 12b, etc. are vehicle bodies corresponding to goods,
These vehicle bodies 12.12a, 12b are placed on the conveyor 11 at approximately equal intervals and in close proximity in order to improve the production efficiency of automobiles. In addition, these car bodies 1
Mobile communication devices 30.30a, 30b having the same configuration are hooked to predetermined positions on the front surfaces of 2.12a, 12b in the initial process of the manufacturing line. These mobile communication devices 30
．． 30a and 30b each have a predetermined identification code ID and unique specification information SD (
(model, standard, vehicle number, production history, etc.)
When a read command RC and an identification code ID are received from a fixed communication device 20, which will be described later, only the mobile communication device, for example 30, that matches the identification code ID reads out its specification information SD and transmits a predetermined information via electromagnetic waves of frequency f. It is sent periodically.

On the other hand, a work station 39 is installed at a predetermined position on the side of the conveyor 11. This work station 3
9, 20 is specification information S periodically transmitted via electromagnetic waves of frequency f from the mobile communication device 30 hooked to the vehicle body 12 that has arrived at the work station 39.
This fixed communication device 20 always transmits the read command RC and the identification code ID of the mobile communication device 30 from the antenna 40 to a predetermined space near the conveyor 11 in front of the work station 39. There is.

41 is a robot that performs a predetermined operation on the vehicle body 12 corresponding to the specification information SD; 42 is a robot controller that controls the drive of the robot 41; Furthermore, car body 1
2a is a robot 41 at the work station 39;
Due to this, the prescribed work has not yet been carried out, and the vehicle body 12b
The robot 41 at the work station 39 has already performed a predetermined work and is transported to the next work station. Although the mobile communication device 30b hooked to the vehicle body 12b receives the read command RC from the fixed communication device 20, its identification code ID and the identification code ID from the fixed communication device 20 do not match. This is a state in which the specification information SD is not being transmitted. Further, although the mobile communication device 30a hooked to the vehicle body 12a also receives the read command RC from the fixed communication device 20, its identification code ID and the identification code ID from the fixed communication device 20 similarly match. Therefore, the specification information SD is not transmitted. 43 inputs specification information SD specific to the vehicle body 12 from the fixed communication device 20, and inputs this specification information SD.
This is a sequence controller that determines a work command corresponding to the robot controller 42 and outputs this work command to the robot controller 42. This sequence controller 43 identifies all the mobile communication devices 30.30a, 30b hooked to the vehicle bodies 12.12a, 12b, etc. input to the production line from a host device such as a large computer for production management (not shown). The code ID is input, and after car body 12b, car body 1
2. Furthermore, it is possible to determine that the vehicle body 12b etc. will arrive next to the vehicle body 12.

Next, the specific configuration of the mobile communication device 30 is shown in FIG.

22 is an antenna section, and 23 is an AD conversion circuit that amplifies and detects a weak high-frequency analog signal from the antenna section 22 with a predetermined gain, and performs AD conversion. 48 is R storing the identification code ID of this mobile communication device 30.
It's OM. This ROM 4B corresponds to the identification code holding means 36, and the identification code ID is stored in advance in the initial process of the manufacturing line by a ROM writer or the like. 24 is AD
Detects whether a read command RC exists in the digital signal from the conversion circuit, and when a read command RC is detected, an identification code ID received following the read command RC
This is a decoder that determines whether or not the ID matches the identification code ID stored in the ROM 48, and if the match is confirmed, outputs a read signal R to the memory operation circuit 26, which will be described later, after a predetermined period of time. These antenna parts 22, AD
The conversion circuit 23 realizes the receiving means 31. Further, the decoder 24 realizes a confirmation means 35. 29 determines whether or not the other mobile communication devices 30a, 30b, etc. are transmitting their respective specification information SD to the fixed communication device 20 based on the presence or absence of a signal received via the antenna section 22. Detection circuit and other mobile communication device 30a
Alternatively, when detecting that the mobile communication device 30b is transmitting the respective specification information 4 [SD] to the fixed communication device 20, the detection circuit 29 outputs a delay signal to the delay generation circuit 25. It has become. This detection circuit 29
corresponds to the detection means 37. Note that this detection circuit 29 is designed to be able to receive signals and disturbance noises while distinguishing them from each other. The delay generating circuit 25 is a stopping means 3.
8, that is, when receiving the delayed signal from the detection circuit 29, the internal random number generation circuit is activated to output the pause signal D1 to the decoder 24 for a predetermined period of time, and the detection circuit 29
When the delay signal is released, the decoder 24 is operated to stop outputting the pause signal D1. In this way, since the same identification code ID is set in the mobile communication devices 30, 30a, 30b, etc., the specification information S
When a contention state occurs in the transmission of D, the fixed communication device 20 that is in the transmission state is first allowed to take over. Reference numeral 26 denotes a memory operation circuit that reads specification information SD specific to the vehicle body 12 from a RAM 27 (described later) when receiving the readout signal R from the decoder 24, and outputs the specification information SD to a DA conversion circuit 28 (described later). When all the specification information SD has been read, a read end signal E is output to the decoder 24. These decoder 24 and memory operation circuit 26 realize reading means 32. RAM 27 contains specification information S specific to the vehicle body 12
D, and this specification information SD is stored in advance in the initial process of the manufacturing line. This RAM 27 corresponds to the storage means 33.

28 is the DA conversion circuit, which converts the specification information SD from the memory operation circuit 26 into an analog signal and performs, for example, PCM modulation using a carrier wave signal from the oscillation circuit 18 that oscillates at a predetermined frequency f. Signal SDI
is transmitted via the antenna section 22.

These DA conversion circuit 23, oscillation circuit 18, and antenna section 22 correspond to transmitting means 34.

Furthermore, the specific configuration of the fixed communication device 20 is as shown in FIG.

40 is the aforementioned antenna, 44 is a mobile communication device 30.3
This is a high frequency amplification circuit that amplifies a high frequency signal of frequency f arriving from 0a, 30b, etc.

46 is an AD conversion circuit that converts the high frequency signal from the amplifier circuit 44 into a digital signal. 47 processes the digital signal from the AD conversion circuit 46 and converts it to the vehicle body 12.
．． 12a, 12b, etc., and sequentially stores these specification information SD at predetermined addresses in the RAM 48. 51 is RAM50
This microprocessor performs arithmetic processing based on the program stored in the RAM 48 and the specification information SD stored in the RAM 48, and outputs the output to the sequence controller 43, which will be described later, via the interface circuit 56. Further, this microprocessor 51 is configured to output a read command RC and an identification code ID of the next vehicle body 12b to a digital control circuit 52, which will be described later, at a predetermined timing after the above calculation process. 52 is a digital control circuit which, upon receiving the read command RC and identification code ID from the microprocessor 51 at a predetermined timing, converts it into a predetermined format and outputs it to a DA conversion circuit 54, which will be described later. Reference numeral 53 denotes an oscillator, which oscillates a carrier wave signal of a predetermined frequency f and outputs the carrier wave signal to a DA conversion circuit 54, which will be described later. 5
4 is the DA conversion circuit, and the digital control circuit 52
The read command RC and identification code ID from the oscillator 53 are modulated based on a carrier wave signal of frequency f from the oscillator 53, and this modulated signal is converted into an analog signal to be sent to the high frequency amplification circuit 5.
It is designed to output to 5. 55 is the high frequency amplification circuit, which amplifies the modulated signal from the I)A conversion circuit 54 and sends it out via the antenna 40. The microprocessor 51, digital control circuit 52, oscillation circuit 53, DA conversion circuit 54, high frequency amplification circuit 55, and antenna 40 realize the second transmission means. 49 is RAM48.50, microprocessor 5
1. A common bus that serves as a route for information exchange between the interface circuit 56 and the digital WJ@path 52. The microprocessor 51 reads all or part of the specification information SD stored in the mobile communication devices 30, 30a, 30b, etc. based on new input information from an externally provided keyboard device (not shown). New specification information S
It also has a function to rewrite to D, and this new specification information S
If you enter D and identification code ID from a keyboard device, etc.,
The microprocessor 51 has a digital control circuit 52, D
A conversion circuit 54, high frequency amplification circuit 55, high frequency amplification circuit 55, and further via antenna 40 mobile communication device 30.3
A write command is added to the new specification information SD and the identification code ID to 0a, 30b, etc., and is then transmitted. When the mobile communication device 30 etc. receives a write command and identification code ID from the fixed communication device 20 via the antenna section 22, the decoder 24 decodes the write command and the identification code ID, and the memory operation circuit 26 decodes the following specifications. RA information SD
In the product specification management device having such a configuration, the specification information SD is rewritten for the mobile communication device specified by the identification code ID by storing it in M27. The mobile communication device 30 is attached to the vehicle body 12 that has arrived at the work station 39 and is about to undergo a predetermined work, and the mobile communication device 30 is attached to the vehicle body 12b that has received the predetermined work at the work station 39. Assuming that the mobile communication device 30b and the vehicle 12a that arrives at the work station 39 next to the vehicle body 12 are receiving the read command RC from the fixed communication device 20, the operation of the specification management device for this article is carried out. explain.

First, the vehicle body 12 transported to the work station 39
The decoder 24 of the mobile communication device 30 attached to the antenna unit 2 receives the read command RC from the fixed communication device 20.
2 and the AD conversion circuit 23, and then it is checked whether the identification code ID matches the identification code ID stored in the ROM 4B. If it is confirmed that the mutual identification codes ID match, the decoder 24 outputs a read signal R to the memory operation circuit 26. Then, the specification information SD is read from the memory operation circuit 26 RAM 27 and the read specification information SD is output to the DA conversion circuit 28. Then, the DA conversion circuit 28 modulates the specification information SD from the memory operation circuit 28 in a predetermined manner using a high frequency signal of frequency f from the oscillation circuit 18, generates a modulated signal SDI, and transmits it via the antenna section 22. . Therefore, when the memory operation circuit 26 has read out all the specification information SD from the RAM 27, it outputs an end signal E to the decoder 24. Then, when the decoder 24 receives the read command RC from the fixed communication device 20 again, the above-described operation is started again after a predetermined period of time.

On the other hand, the fixed communication device 20 receives the specification information S transmitted from the mobile communication device 30 as a response to the read command RC.
When D is received by the antenna 40, the high frequency amplifier circuit 44 amplifies this signal and outputs it to the AD conversion circuit 46. Then, the AD conversion circuit 46 converts the high frequency analog signal from the high frequency amplifier circuit 44 into a digital signal. next,
The digital control circuit 47 processes the digital signal from the AD conversion circuit 46 and demodulates the specification information SD of the vehicle body 12. Further, the digital control circuit 47 stores the demodulated specification information SD at a predetermined address in the RAM 48. Then, the microprocessor 51 has a RAM 50
Processing is performed based on the program stored in the RAM 48 and the specification information SD stored in the RAM 48. Next, the microprocessor 51 transmits the specification information SD of the vehicle body 12 to the sequence controller 43 via the interface circuit 56.

When the sequence controller 43 receives the specification information SD, it determines the vehicle body number included in the specification information SD and recognizes the arrival of the vehicle body 12.

Next, a predetermined work instruction corresponding to this specification information SD is output to the robot controller 42. Then, the robot controller 42 performs a predetermined work on the vehicle body 12 by controlling the drive of the robot 41. After the predetermined work has been performed on the vehicle body 12 in this manner, the conveyor 11 transports the vehicle body 12 to the next work station and also transports the vehicle body 12a to the work station 39. Then, the same operation as described above is started.

By the way, the detection circuit 29 of the mobile communication device 30 happens to detect the identification code I via the antenna section 22 and the AD conversion section 23.
For example, assume that the mobile communication device 30a or the mobile communication device 30b is already transmitting its specification information SD. Then, first, the detection circuit 2 of the mobile communication device 30
9 outputs the delayed signal to the delay generation circuit 25. next,
When the delay generation circuit 25 receives a delay signal from the detection circuit 29, it outputs a pause signal D1 for a predetermined time to the decoder 24.

Therefore, decoder 24 does not output read signal R to memory operation circuit 26. Then, when the other mobile communication device 30a or the mobile communication device 30b finishes transmitting its specification information SD, the antenna unit 22 and A of the mobile communication device 30
The detection circuit 29 receives the specification information S of other mobile communication devices 30a or 30b via the D conversion circuit 23.
Since it is detected that D is not being transmitted, the delay generating circuit 25 does not output the pause signal D1. After that, the read command RC and identification code ID are sent from the fixed communication device 20 to the decoder 2.
4 is decoded, the read signal R is sent to the memory operation circuit 27.
will be output to . The subsequent operations are the same as described above.

Although this embodiment has been described in the context of an automobile production line, the present invention is not limited to this, and can be applied to, for example, an article specification control device in which a large number of electrical products are loaded on a pallet. .

[Effects of the Invention] As explained above, according to the present invention, the fixed communication device is provided with the second transmission means, while the mobile communication device is provided with the detection means, the stop means, and the reading means with the identification device. Since the fixed communication device includes the code holding means and the confirmation means, the fixed communication device can specify a desired mobile communication device using the identification code. Additionally, when a fixed communication device is already in communication with a desired mobile communication device and another mobile communication device with the same identification code approaches this mobile communication device, the other mobile communication device Even if a read command is received, the transmission of the specification information is stopped by the stop means. and in order to transmit the specification information when another mobile communication device detects the termination of the communication state of the mobile communication device by the detection means,
The fixed communication device can receive specification information from each mobile communication device separately.

As a result, it is possible to provide an article specification management device that can distinguish and receive specification information for each article even when the articles are close to each other.

[Brief explanation of the drawing]

Fig. 1 is a diagram corresponding to claims of the present invention, Fig. 2 is a system configuration diagram of an article specification management system in an embodiment of the present invention, and Fig. 3 is a configuration diagram of a mobile communication device in Fig. 2. , FIG. 4 is a block diagram of the fixed communication device shown in FIG. 2, and FIG. 5 is a block diagram of a conventional product specification management device. 19... Second transmitting means 20... Fixed receiving device 30... Mobile communication device 30a... Mobile communication device 30b... Mobile communication device 31... Receiving means 3
2... Reading means 33... Storage means 34.
... Transmission means 35 ... Confirmation means 36 ...
Identification code holding means 37...Detection means 38...Stopping means ID...Identification code RC...Reading command SD...Specification information Fig. 1

Claims (1)

[Scope of Claims] A fixed communication device (20) is provided which transmits a read command (RC) via electromagnetic waves and receives article-specific specification information (SD) arriving via electromagnetic waves. a storage means (33) that stores information (SD) in advance;
Receiving means (31) for receiving a read command (RC) transmitted from the fixed communication device (20) via electromagnetic waves;
a readout means (32) for reading article-specific specification information (SD) from the storage means (33) after decoding the readout command (RC); and article-specific specification information read by the readout means (32). (SD) via electromagnetic waves, and is configured by a mobile communication device (30) attached to the article, the fixed communication device (20) is the mobile communication device (30
) is provided with a second transmitting means (19) for transmitting a predetermined identification code (ID) together with the readout command (RC), while the readout means (3) of the mobile communication device (30)
4) includes an identification code holding means (36) for holding a predetermined identification code (ID) in the mobile communication device (30), and an identification code holding means (36) for holding a predetermined identification code (ID) in the mobile communication device (30); (ID), the identification code (ID) and the identification code (I) held by the identification code holding means (36) are
and (D), and if a match is confirmed, confirming means (35) for permitting reading of article-specific specification information (SD) from the storage means (33);
a detection means (37) for detecting whether or not another mobile communication device (30a, 30b) is transmitting article-specific specification information (SD); and when the detection means (37) is detecting, the transmission The operation of the means (34) is stopped, and when the detecting means (37) is not detecting, the transmitting means (34)
An article specification management device characterized by comprising a stop means (38) for releasing the stoppage of the operation.