JPH03158025A - Object identification system - Google Patents

Abstract

PURPOSE:To extend the service life of a data carrier memory by writing a data into the data carrier memory only when a data written at an ID controller and a data stored in the data carrier are dissident. CONSTITUTION:Readout processing of a data is implemented from an address of a memory 34 corresponding to the processing address of a data carrier 12. Then whether or not a readout data is coincident with a write data pointed out by the pointer stored in a memory 22 is checked. Then when the data are dissident, the processing of writing the data pointed out by a pointer to the processing address is implemented, and when coincident, the processing address and the write data pointer are incremented and the processing byte number is decremented. Thus, the service life of the memory of the data carrier 12 is extended.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to an identification system for tools of machine tools, parts in factories, products used in product management, distribution systems, and the like.

[Conventional technology]

In order to mechanize the tool management of conventional machine tools and the identification of parts and products on assembly lines in factories, tools 1
A system is needed to identify and manage various items such as parts and products. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 63-221950, a data carrier having a memory is provided in the object to be identified, and the necessary information is written in such memory by external data transmission, and the information is read as necessary. An article identification system has been proposed in which the article is displayed on the screen.

According to the conventional article identification system described in No. 2, the data carrier that holds data does not require a battery, and data transmission can be performed by supplying power from the outside only when data is being transmitted.

For this reason, E''FROM is used as the memory.

[Problem to be solved by the invention]

However, in such a conventional article identification system, if E"FROM is used as the memory, there is a limit to the number of times it can be rewritten. For this reason, data must always be written every time data is transmitted, regardless of the data content of the data carrier. For example, there was a drawback that the lifespan of the memory of the data carrier was shortened.

The inventions of claims 1 and 2 of the present application have been made in view of the problems of the conventional article identification system, and when the data in the memory of the data carrier is the same as the data to be written, the data cannot be written. The technical challenge is to extend the lifespan of data carriers by preventing this from occurring.

[Means to solve the problem]

As shown in FIG. 1(a), the invention of claim 1 of the present application includes a memory IA that holds data, a memory control means IB that controls writing and reading of data into the memory, and a command and a command given from the outside. It has a data transmission means IC that demodulates data and transmits the read data to a memory control means, and has a data carrier 1 attached to an article to be identified, and a data carrier 1 that transmits data to the data carrier and transmits the sent data. An article identification system comprising a write/read control unit 2 having a receiving data transmission means 2A, the write/read control unit having write data holding means holding data to be written to a data carrier. 2
B, a data reading means 2C for reading data at a corresponding address before writing data to the data carrier, and checking whether the data read by the data reading means and the data held in the write data holding means match. The present invention includes a data matching determining means 2D for determining the data, and a data writing means 2E for writing the data held in the write data holding means via the data transmitting means when the data do not match by the data matching determining means. This is a characteristic feature.

As shown in FIG. 1(b), the invention of claim 2 of the present application includes a memory IA that holds data, a memory control means IB that controls writing and reading of data to the memory, and a command and a command given from the outside. It has a data transmission means IC that demodulates data and transmits the read data to the memory control means, and has a data carrier l attached to the article to be identified, and a data carrier l that transmits data to the data carrier and transmits the sent data. An article identification system comprising: a write/read control unit 2 having a data transmission means 2A for receiving data, wherein the data carrier has a data holding means ID for temporarily holding given data; a match determination means IE that determines whether the given data matches the given data, and writes the given data when they do not match;
It is characterized by having the following.

[Effect]

According to the invention of claim 1 of the present application having such features, the write/read control unit temporarily holds the data to be written to the data carrier, once reads the data at the address to be written from the data carrier, and If so, the write process is not performed, and if they are not the same, a write signal is given to the data carrier side via the data transmission means to write the data.

Further, in the invention of claim 2 of the present application, the data carrier is capable of writing/writing.
It temporarily holds the data given from the read control unit side and determines whether it matches the data held in the memory, and if it matches, it does not write the data, but if it does not match, it writes the given data to the memory. I try to keep it that way.

(Embodiment) Fig. 2 is a block diagram showing the structure of an article identification system according to an embodiment of the present invention.
A data carrier 12 that is directly attached to the data carrier 12, a read/write head (hereinafter referred to as RW head) 13 that writes and reads data to and from the data carrier 12, and an RW head 13.
ID controller 14 that is connected to and controls its operation.
will be provided. RW head 13 and ID controller 1
4 constitutes a write/read control unit 2. Also ID
The controller 14 is connected to a host computer 15.

Now, as shown in the block diagram in FIG. 3, the ID controller 14 includes a microprocessor (CPU) 21 that controls writing and reading of data to and from the data carrier 12, and a memory 22 that holds the system program and data.
An input/output interface 23 for inputting and outputting data to and from the host computer 15 is also provided. The RW head 13 includes a modulation circuit 24 that modulates data to be transmitted to the data carrier 12, and a transmitter 25 driven by the output thereof. For example, the transmitting section 25 receives F from the coil.
Data is transmitted to the data carrier 12 by outputting an SX modulated signal. Further, the received signal obtained from the data carrier 12 is given to the demodulation circuit 27 via the receiving section 26. The demodulation circuit 27 demodulates this signal and provides it to the CPU 21.

Next, the configuration of the data carrier 12 will be explained with reference to FIG. 4. In FIG. 4, a transmitting/receiving section 31 receives and transmits a frequency signal emitted from the RW head 13, and its reception output is given to a demodulation circuit 32. The demodulation circuit 32 demodulates this signal, converts the data into the original signal, and supplies the signal to the control section 33. The control unit 33 consists of a microprocessor and a memory that holds its control program, etc., and is connected to the memory or E"F ROM via a bus.
A memory 34 (IA) is connected. The control unit 33 is a memory control means IB that controls writing or reading of data according to commands and data given from the ID controller 14, and the read data is converted into a serial signal and transmitted/received via the modulation circuit 35. Section 31.

The transmitting/receiving section 31 provides a signal to the RW head 13 by changing the resonance frequency of a resonant circuit, for example, as in the conventional example. Here, the transmitting/receiving section 31. Demodulation circuit 3
2 and the modulation circuit 35 constitute a data transmission means IC which demodulates command data given from the IDj controller and gives it to the memory control means and transmits the read data.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG. First, when a write command is given from the host computer 15, the ID controller 14 receives the command (step 41) and holds the start address of the memory of the data carrier and the write data included in the command. Figure 6 shows the ID controller 14
This is a memory map of the memory 22 of . and step 4
The process proceeds to step 2, where the start address of the given write command is written in the processing address area of the memory of the ID controller 14, and the process proceeds to step 43, where the number of bytes to be processed is calculated. Then, the process proceeds to step 44, and the write data pointer is set to the first address of the write data.

The program then proceeds to routine 45, where data is read from the address of the memory 34 corresponding to the processing address of the data carrier 12. Next, the process proceeds to step 46, in which it is checked whether the read data matches the write data indicated by the pointer held in the memory 22. If the data do not match, the data indicated by the pointer is written to the processing address (routine 47); if they match, the process proceeds to step 48 without performing this processing and the processing address and write data pointer are written. Increment and decrement the number of bytes processed. The process then proceeds to step 49 to check whether the number of processed bytes has reached O. If it is not O bytes, the process proceeds to routine 45 and repeats the same process. In this way, each byte of the write data is sequentially checked to see if it matches the data on the data carrier 12, and only if they do not match, the data is written into the memory 34 of the data carrier 12. When the number of processed bytes reaches O in this way, the process proceeds to step 50, where a response indicating the end of processing is sent to the host computer 15, and the processing is ended. Here, the CPLI 21 has achieved the function of the write data holding means 2B that holds the write data given from the host computer in step 41, and
5 achieves the function of data reading means 2C for reading out the data of a given command. Further, step 46 is a data coincidence determining means 2B that determines whether the data held by the write data holding means and the read data match, and a routine 47 is writing the data given to the data carrier when these data do not match. It achieves the function of data writing means 2E.

Next, a second embodiment embodying the invention of claim 2 of the present application will be described. In the embodiment described above, the ID controller 1
In step 4, it is determined whether the data match, and new data is written only when the data in the data carrier's memory and the data to be written do not match. In this embodiment, the structure shown in FIGS. 2 to 5 is similar to the first embodiment described above. FIG. 7 is a flowchart showing the operation of the data carrier when such a determination is made within the data carrier, and FIG. 8 is a diagram showing the buffer in the control unit 33 of the data carrier. In these figures, when the data carrier 12 starts operating, it first checks in step 51 whether a command from the ID controller 13 is received.

If the command is received, the process proceeds to step 52 to check whether it is a write command, and if it is a write command, the process proceeds to steps 53 and 54 to transfer the write address and write data to the buffer of the data carrier 12 as shown in FIG. Hold as shown. Then proceed to step 55.56 and memory 34
The data at the write address is read out and checked to see if it matches the data to be written. If these data do not match, the data is written to the write address (step 57), and if the data do not match, the process proceeds to step 58 without performing these processes and sends a processing end response to the ID controller 14. Send and end the process. Here, the control unit 33 performs steps 52-
If a write command is transmitted in 54, the data holding means ID is used to temporarily hold the data in a buffer within the control unit.
Steps 55 to 57 achieve the function of a match determining means IE that determines whether the data held in the memory matches the given data and writes the given data when they do not match. ing.

In this way, in this embodiment, the data sequentially given from the ID controller 14 via the read/write head 13 is
Data is written only if it does not match the data already held in the memory of the data carrier.

In this case, there is no need to once transmit the read data to the ID controller side by spatial transmission, so high-speed processing is possible, and the influence of noise etc. in spatial transmission is eliminated, making it possible to improve safety.

〔Effect of the invention〕

As explained in detail above, in the invention of claim 1 of the present application,
When using E"FROM as the data carrier memory, the ID controller side determines whether the data to be written matches the data held in the data carrier and writes it to the data carrier memory only when they do not match. The service life of the data carrier can be greatly extended.Furthermore, if there are many matching portions between the write data and the data already held by the data carrier, the write processing time can be shortened.

Further, in the invention of claim 2 of the present application, since such discrimination processing is performed on the data carrier side, in addition to the above-mentioned effects, the processing time for matching discrimination can be shortened, and high-speed processing can be performed. This also makes it possible to improve safety.

[Brief explanation of the drawing]

Figures 1(a) and 1(b) are claims 1 and 2 of the present application.
2 is a perspective view showing the overall structure of the article identification system, FIG. 3 is a block diagram showing the structure of 10 controllers, FIG. 4 is a block diagram showing the structure of the data carrier, FIG. 5 is a flowchart showing the operation of the ID controller, FIG. 6 is a memory map of the ID controller, FIG. 7 is a flowchart showing the operation of the data carrier, and FIG. 8 is a diagram showing the data buffer in the data carrier. 1.12... Data carrier IA, 34
Memory IB-...Memory control means 1c,
2A--Data transmission means 1D--Data holding means IE--Coincidence determining means 2--Writing/reading control unit 2
B...-Written data holding means 2C-...
・Data reading means 2D...Song data matching determining means 2E---Data writing means 15...
・Upper computer 21・・・・−・CPU
33... Control section

Claims (2)

[Claims] (1) A memory that holds data, a memory control means that controls writing and reading of data to the memory, demodulating commands and data given from the outside, and transmitting the read data to the memory control means. a data carrier that is attached to an article to be identified, and a write/read control unit that has a data transmission means that transmits data to the data carrier and receives the transmitted data. An article identification system, wherein the write/read control unit includes a write data holding means for holding data to be written to the data carrier, and a write data holding means for holding data to be written to the data carrier, and a write data holding means for holding data to be written to the data carrier. a data reading means for reading; a data matching determining means for determining whether the data read by the data reading means matches the data held in the write data holding means; data writing means for writing the data held in the write data holding means via the data transmission means when there is a match;
An article identification system comprising: (2) A memory that holds data, a memory control means that controls writing and reading of data to the memory, demodulating commands and data given from the outside, and transmitting the read data to the memory control means. a data carrier that is attached to an article to be identified, and a write/read control unit that has a data transmission means that transmits data to the data carrier and receives the transmitted data. An article identification system, wherein the data carrier includes a data holding means for temporarily holding given data, and a data holding means that determines whether the data held in the memory matches the given data, and when there is a non-match, the given data is 1. An article identification system, comprising: a match determining means for writing the data.