JPH03234446A - Commodity discrimination system - Google Patents

Abstract

PURPOSE:To prevent loss of data in advance, by equipping a writing cancelling means which writes in a data carrier via a data transmission means the data held by a data reading means at the cancelling time of data writing. CONSTITUTION:A commodity discrimination system having a data carrier 1 fitted to the commodity of a discriminating object and a data transmission means 2A which transmits data to the data carrier 1 and receives the fed out data, is set. Then, it is composed by equipped a data reading means 2B holding the data of the address to be written prior to the data writing on to the data carrier 1 with its reading and a data writing means 2C writing via the data transmission means 2A the writing data after reading the data by the data reading means 2B and so as to write by a writing cancelling means 2D in the data carrier 1 via the data transmission means 2A the data held by the data reading means 2B again at the cancelling time of the data writing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to an identification system for tools for 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. It also has a data manual function and display function to easily check and modify data on the data carrier, and inputs commands and necessary data from the data input section and transfers the data to the data carrier's memory via the transmission medium. A portable ID controller that performs reading or writing is used.

[Problem to be solved by the invention]

In such portable ID controllers, the manual system for commands and data is often complicated, and the data input section is often miniaturized.

Therefore, there is a problem in that important data on the data carrier may be rewritten due to an operational error, and it may not be possible to recover the data.

The present invention has been made in view of the problems of the conventional article identification system, and is designed to easily cancel the writing and write the original data even after writing data on a data carrier. This is a technical issue.

[Means for Solving the Problems] As shown in FIG. 1, the present invention comprises a memory IA that holds data, a memory control means IB that controls writing and reading of data into the memory, and commands given from the outside. a data carrier 1 which is attached to an article to be identified, and a data carrier 1 that demodulates the data and transmits the read data to the memory control means; an article identification system comprising: a write/read control unit 2 having a data transmission means 2A for receiving data; means 2B, data writing means 2C for writing the write data via the data transmission means after reading the data by the data reading means, and data writing means 2C for writing the write data via the data transmission means after data reading by the data reading means; The present invention is characterized in that it has a write canceling means 2D for writing to the data carrier via the write canceling means 2D.

[Effect]

According to the present invention having such characteristics, before writing data to the data carrier on the write/read control unit side, the data reading means 2B reads and holds the data on the data carrier, and then the data is written. I'm here. If the writing is to be canceled after writing, the read and held data is given to the data carrier again and the data is written to restore the original state.

〔Example〕

FIG. 2(a) is a perspective view showing the structure of an article identification system according to an embodiment of the present invention. In this figure, the article identification system is a pallet 1 on which parts to be identified are transported.
1, a read/write head (hereinafter referred to as RW head) 13 that writes and reads data to and from the data carrier 12, and RW head 1.
A portable ID controller 4 is provided which is connected to 3 and controls its operation. The RW head 13 and the ID controller 14 are located at the bottom of the write/read control unit 2. The ID controller 14 is, for example, a portable controller having a data input section 23 and a display section 24, as shown in a front view in FIG. 2(b).

Now, as shown in the block diagram in FIG. 3, the RW head 13 and ID controller 14 include 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. A data input section 23 and a display section 24 are also provided. The RW head 13 includes a modulation circuit 25 that modulates data to be transmitted to the data carrier 12, and a transmitter 26 driven by the output thereof. The transmitter 26 transmits data to the data carrier 12 by outputting, for example, an FSK-modulated signal from a coil. Further, the received signal obtained from the data carrier 12 is given to the demodulation circuit 28 via the receiving section 27. The demodulation circuit 28 demodulates this signal and provides it to the CPU 21. Here, the RW head 13 achieves the function of the data transmission means 2A for transmitting data to and from the data carrier.

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 is connected to a microprocessor and a memory 34 (IA) via a bus, which stores a microprocessor and its control programs. 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 sent to the modulation circuit 35.
The signal is sent to the transmitter/receiver 31 via the transmitter/receiver 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 32 and modulation circuit 3
Reference numeral 5 constitutes a data transmission means IC which demodulates command data given from the ID controller, 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 of FIG. 5 and the display example of FIG. 6.

When writing data, first a write command is given from the data input section 23. Here, the write command is executed by setting the write key rWRITE and an address such as ro O10J as shown in FIG. 6(a), then inputting data such as r123456789ABcDEJ and pressing the set key rsETJ. Then, the ID controller 14 receives the command (step 41), proceeds to step 42, takes in the write start address and write data, and stores them in the memory 22 of the ID controller 14 as shown in FIG. Then step 4
Proceeding to step 3, the number of write bytes is calculated based on the write data and stored in the memory 22. The program then proceeds to routine 44 to read the write byte number of data from the write start address of the data carrier 12, and proceeds to step 45 to hold the read data in the memory 22. The program then proceeds to routine 46 to write write data to the data carrier 12 from the write start address. Then, the results are displayed as shown in FIG. 6(b), and the process ends (step 47). Here, the CPU 21 achieves the function of the data holding means 2B that reads and holds the data in advance when writing the data to the data carrier 12 in steps 41 to 45, and in the routine 46, the CPU 21 performs the function of the data holding means 2B to read and hold the data before writing the data to the data carrier 12. It achieves the function of the writing means 2C.

Next, the process for canceling data once written will be explained. FIG. 8 shows the cancellation key r from the host computer 15.
12 is a flowchart showing processing when cANcJ is input. First, when this key is input, as shown in FIG. 6(C), the first address written last time, in the case of the operation described above, the address "0010J" and the data of the data carrier 12 read in advance from that address before writing. is displayed (step 52).Then, the routine advances to routine 53, where the read data previously held in the memory 22 is sequentially written into the data carrier 12 from the write start address.After the writing is completed, the routine advances to step 54. The result is displayed, for example, as shown in FIG. 6 (2), and the process is completed.
In this embodiment, the function of the write canceling means 2D is achieved, which writes the data read by the data reading means back into the data carrier when canceling the write.

As described above, according to the present invention, even if data is accidentally written from the ID controller to the data carrier, the original data is retained, so the original state can be restored by performing a cancellation operation. . Although this embodiment describes a portable controller as the ID controller, it goes without saying that the present invention is applicable not only to portable controllers but also to ordinary ID controllers.

〔Effect of the invention〕

As explained in detail above, according to the present invention, since the data in the data carrier area to be written is once read and held on the D controller side, it is possible to restore the original state by a cancellation operation. This makes it possible to prevent data loss.

[Brief explanation of drawings]

Figure 1 is a functional block diagram of the present invention, Figure 2 (a) is a perspective view showing the overall configuration of an article identification system according to an embodiment of the present invention, Figure 2 (b) is a front view of the ID controller, and Figure 2 (b) is a front view of the ID controller. Figure 3 is a block diagram showing the configuration of the RW head and ID controller, Figure 4 is a block diagram showing the configuration of the data carrier, Figure 5 is a flowchart showing the operation of the ID controller when writing data, and Figure 6 is the command and FIG. 7 is a diagram showing an example of the display, FIG. 7 is a memory map of the ID controller at this time, and FIG. 8 is a flowchart showing the operation when canceling writing. 1, 1: L---------・-Data carrier
LA, 34-・-・・～・Memory IB・-1---
--Memory control means IC92A--Data transmission means 2.--Write/read control unit
2 B----- Data reading means 2C... Data writing means 13---RW header 21-m---CPU3--Data input section-- ~---Control unit 2D---Writing cancellation means 14---ID controller 22---1---Memory 2 24------Display section 33

Claims (1)

[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 comprising: a data reading means for reading and holding data at an address to be written before writing data to the data carrier; and after reading the data by the data reading means, the written data is transmitted to the data carrier. and write canceling means for writing the data held by the data reading means again into the data carrier via the data transmission means when data writing is canceled. An article identification system featuring: