JPH0497635A - Data processing system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data processing system in which components within the system are divided into a plurality of modules and housed in separate housings.

[Prior Art] Conventionally, data processing devices such as electronic registers are known in which modules (units) such as a printer, a keyboard, a display, a data processing section, etc. are housed in separate housings.

Conventionally, as for the connection method of each unit in such a data processing device, as shown in FIG. 9, there is a method of connecting with a connector C attached to the housing, and a method of connecting with a cable as shown in FIG. A method of connecting by CB has been realized.

[Problems to be Solved by the Invention] However, the connector method is inconvenient because even though it is divided into units, it is not possible to arrange each unit in an arbitrary layout. Also, in the cable method, the position of the cable CB is fixed, and
Since the length of the cable CB is also set to the minimum necessary length, each unit cannot be freely arranged.

Further, even if a long cable CB is prepared so that the units can be freely arranged, there is a problem that the cable CB gets in the way and makes it impossible to perform certain tasks on the desk.

This is due to the fact that each unit is physically directly connected using connector C, cable CB, etc. to transmit and receive data. Therefore, it is possible to transmit and receive data between each unit (module) wirelessly. However, in this case, if the data is simply transmitted and received wirelessly, there is a risk that the transmitted and received data may be intercepted by a third party, and the challenge is to transmit and receive data wirelessly without being intercepted by a third party.

An object of the present invention is to enable data transmission and reception between each module to be performed wirelessly without being intercepted by a third party.

[Means to solve the problem] The means of this invention are as follows.

In this data processing system, the components within the system are divided into a plurality of modules and housed in separate housings.

Each of the modules is provided with modulation/demodulation means, and each of these modules is placed near the leakage wire.

[Work] The operation of the means of this invention is as follows.

Now, the data processing unit, keyboard, printer, and display modules, each of which is housed in a separate housing and includes modulation/demodulation means, can be arbitrarily placed on a desk with leaking wires buried in its top plate. Suppose you have placed it.

In this case, data input from the keyboard is transmitted to a data processing section and subjected to various processing, and the processing results are transmitted to a printer and a display.

At this time, data transmission between each module is performed via modulation/demodulation means and leakage wires. That is, data is exchanged by receiving leakage radio waves etc. emitted from the slots of the leakage wire.

In this case, the radiation distance of the radio waves is short, and the radio waves can only reach the vicinity of the desk where the leaky wire is buried.

Therefore, data transmission and reception between each module can be performed wirelessly without being intercepted by a third party.

[Example] An example will be described below with reference to FIGS. 1 to 8.

FIG. 1 is a diagram showing the external appearance of an electronic register, and as shown in the figure, this electronic register is connected to the main CPU unit Ul.
, keyboard unit U2, R/J printer unit U
3. It is composed of each unit of the display unit U4 and the drawer DR.

The main CPU unit U1 and the drawer DR are housed in a soccer table T, and a leaky coaxial cable LCX is buried in the top plate TB of the soccer table T.

That is, as shown in FIG. 2, a leaky coaxial cable LCX is connected to the main CPU unit U1,
This leaky coaxial cable LCX is connected to the top plate of the soccer table T.
It is buried in a meandering shape on the surface. And the main CP
By transmitting and receiving data between the U unit U1 and other units using leakage radio waves from the leaky coaxial cable LCX, the keyboard unit U2, R/J printer unit U3, and display unit U4 can be connected to the top of the soccer table T. It can be placed at any position on the board TB.

As shown in FIG. 3, the leaky coaxial cable LCX is composed of an inner conductor and an outer conductor in which slots (holes) are formed at predetermined intervals. This leaky coaxial cable LC
When electromagnetic wave energy is transmitted between the inner and outer conductors of X, a current flows in the outer conductor in the axial direction. If a slot is cut to block this flow, electromagnetic waves will be emitted from this slot. That is,
The leaky coaxial cable LCX is a cable that has both the function of a power feeder and the function of an antenna. In addition,
Other features of the leaky coaxial cable LCX include the following points.

■Since the radiation is carried out along the coaxial cable, there is no need to worry about interference with other lines, and the confidentiality of data can be maintained.

■Since it is possible to radiate to a narrow area, it is possible to radiate efficiently to the required location (by devising cable routing).

■Since it is possible to widen the radiation characteristics, it is possible to transmit multi-channel signals all at once.

■By changing the shape of the slot, you can control the amount of radio waves leaking.

FIG. 4 is a block configuration diagram of the electronic register shown in FIG. 19, in which the main CPU unit U], ]4-board unit U2R, /, J printer unit U3, and display unit U4 have the following common components: Each CPU
1, ROM 2, RAM 3, and modem 4.

Also, as specific elements, the main CP [J unit U1 has the clock circuit T and the drawer DR, the keyboard unit U2 has the keyboard KB, the R/J printer unit U
3 has an R/J printer PR, and a display unit U4 has a display DS. In addition, a leaky coaxial cable L CX is directly connected to the modem 4 of the main CP LJ unit U1, and the keyboard units U2, R/, J printer uni-soto U3, and display unit U4 have a loop antenna 5. .

In addition, CPU1 and ROM2 of the main CPU unit U1
, RAM3, especially main CPU10, main ROM20
, will be referred to as main RAM 30.

CPU10 of the main CPU unit UI is ROM20
According to the preset program, the sales data input from the keyboard unit U2 is processed in various ways, and the processing results are stored in the main RAM 30, printed by the R/J printer unit U3, and displayed on the display unit U4, etc. Controls a series of registration processes. In addition, R/J
The CPU 1 of the printer unit U3 stores the print data sent to the main CPU unit U1 in the RAM 3 according to the program in the ROM 2, generates a print control signal based on the print data, and outputs a print control signal to the R/1 printer PR.
Print it with . Moreover, the CPU1 of the display unit U4 is
According to the program in ROM2, print data sent from the main CPU unit U1 is stored in RAM3,
A display i1J control signal is generated based on the print data and displayed on the display DS. Further, the CPUI of the keyboard unit U2 scans the operation status of the keys on the keyboard KB according to the program in the ROM2, sequentially generates key code signals corresponding to the operated keys, temporarily stores them in the RAM3, and sends them to the main CPU. Send to unit U1.

Such data transmission and reception between each unit is performed via the leaky coaxial cable LCX, the modem 4, and the loop antenna 5.

The reason why the loop antenna 5 is adopted as each antenna for the keyboard unit U2, R/J printer unit U3, and display unit U4 is because the communication distance is short and a large gain is not required.

As shown in Fig. 5, this loop antenna 5 is installed inside the bottom of each unit's housing to shorten and keep the distance to the leaky coaxial cable constant, thereby reducing power consumption and making the gain uniform. At the same time, noise countermeasures are also being taken.

Next, data transmission and reception operations will be explained.

The modem 4 of the keyboard unit U2 modulates the high frequency based on the input data (digital signal) to be transmitted to the main CPU unit U1.
It radiates from the loop antenna 5 of No. 2.

Then, the modulated wave is caught by the slot of the leaky coaxial cable LCX and transmitted via the leaky coaxial cable LCX, and is sent to the modem 4 of the main CPU unit U1.
The signal is demodulated and input to the main cPUIO.

Therefore, the main CPLJ 10 processes the demodulated input data in various ways and supplies the processing results, such as data to be printed and data to be displayed, to the modem 4 of the main CPU unit U. Then, the modem 4 modulates the high frequency based on the given data and connects it to the leaky coaxial cable LC.
Send to X.

Then, a modulated wave is radiated from the slot of the leaky coaxial cable LCX. This radiated modulated wave is caught by each loop antenna of the R/J printer unit U3 and the display unit U4, and is input to the corresponding modem 4.

Then, it is demodulated by these modems 4 and sent to the corresponding CPU.
Printing and display are performed by being given to I.

In this way, data transmission between each unit is performed wirelessly using the leaky coaxial cable LCX. As shown in FIG. 2, this leaky coaxial cable LCX is laid all over the top plate TB of the soccer table T, so that the keyboard unit U2, R/J printer unit U3, and display unit U4 are , it becomes possible to freely place it at any position on the soccer table T. Also, since the radiation distance of radio waves (data) is short and is not radiated far, data can be transmitted to third parties.
It will not be leaked to anyone.

The drive power for the keyboard unit U2, R/J printer unit U3, and display unit U4 is provided by the main CPU unit to which the leaky coaxial cable LCX is directly connected, utilizing the function of the leaky coaxial cable LCX as the above-mentioned power supply line. It is supplied from U1. in this case,
This can be done by equipping the R/J printer unit U3, etc., which consumes a lot of power, with a secondary battery to store DC power rectified from radio waves.

[Modified example] As shown in FIG. 6, the main CPU unit U
1, it is also possible to place it on the top plate TH of the soccer table T without storing it inside the soccer table T, or to make the keyboard and display into a unit without separating them. be.

Also, as shown in Figure 7, without using a soccer table,
For example, it is also possible to attach a leaky coaxial cable to the ceiling of a unit that integrates a main CPU, etc. and a drawer.

Further, as shown in FIG. 8, it is also possible to use a leaky coaxial cable as an inline cable in a master-slave type sales data system. In this case, by using a leaky coaxial cable, it is possible to transmit in a relatively wide band, so that transmission and reception can be performed in parallel using different frequencies on the transmitting side and the receiving side, thereby increasing the speed. Furthermore, since it is possible to transmit multiple channels at once, it can easily accommodate an increase in the number of devices.

In addition, various applications and modifications other than the above are possible, for example,
It can also be applied to data processing devices other than sales data processing devices.

[Effect of the invention] According to the invention, data transmission and reception between each unit is performed by the third
This can be done by wireless transmission and reception without being intercepted by anyone, and although it is a wireless method, it is possible to maintain data confidentiality, and the degree of freedom in the layout of each unit is greatly increased.

is a block configuration diagram of an electronic register, FIG. 5 is a diagram showing the mounting position of a loop antenna, FIGS. 6 to 8 are diagrams showing modified examples, and FIGS. 9 and 10 are connection examples of conventional units. FIG.

Ul...Main CPU unit, U2...Keyboard unit, U3...R/J printer unit, U4
...Display unit, LCX...Leaky coaxial cable,
4...Modem.

Claims (1)

[Claims] Components in the system are divided into multiple modules,
In a data processing system housed in separate housings, each of the above modules is provided with a modulation/demodulation means, each of these modules is placed near a leaky wire, and data is transmitted between each module via the modulation/demodulation means and the leaky wire. A data processing system that performs a series of data processing while transmitting and receiving data.