JPS6248139A - Data communication equipment - Google Patents

Abstract

PURPOSE:To send a message immediately anywhere in a building by sending a high frequency signal from a transmitter to an AC distribution line wired for lighting in a building premises, using a light sensor so as to receive an intensity change due to a high frequency signal in addition to the lighting and decoding a photoelectric conversion output signal. CONSTITUTION:In calling a specific individual, a call code registered for the individual is sent to an AC wire 11. A fluorescent light 7 is lighted by a voltage in 50Hz including harmonics. In irradiating the light of the fluorescent light 7 to a light sensor 9 provided to the surface of a wrist watch 8, an output waveform is obtained at an output terminal of the light sensor 9. This is amplified by an amplifier 12 and only the harmonics is extracted from a band pass filter 13. The call number data carried by the harmonics and a number data in a call code memory 19 at the reception side are compared and when they are coincident, an alarm section 21 of the wrist watch 8 starts ringing and the concerned person recognizes the own callout.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a data communication device in a building or the like.

[Prior Art and its Problems] Generally, from a given seat, people working in other seats in the same building are contacted by a company telephone. However, if the person in question is away from their desk, it is not possible to contact them.For this reason, it is conceivable to provide each employee with a transceiver or pager, but this would be bulky and unrealistic in terms of cost. It is.

Also, instead of telephone calls, for example, the magazine ``Transistor Technology 419''
As described in the April 1985 issue, pages 473-482, it is also being considered to connect a plurality of personal computers to each other using AC wiring and have them communicate with each other through data communication. However, with this type of computer system, not only was it expensive because each person had to be provided with a computer, but it also had the disadvantage that it was impossible to contact people if they were separated from each other.

[Purpose of the Invention] This invention was made in consideration of the above-mentioned point 1, and its purpose is to provide a simple circuit that consumes less power, and which can be used if the person concerned is in a building. The aim is to provide a data communication device that can instantly transmit messages no matter where you are.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention sends a high frequency signal from the transmitter side to an AC distribution line wired for lighting in a building, so that the illuminator emits light in addition to normal light emission. This high-frequency signal causes the luminous intensity to change at high frequencies, and this luminous intensity change is received by an optical sensor, and the photoelectric conversion output signal is decoded.

[Embodiment] An embodiment in which the present invention is applied to an electronic wristwatch as a receiving device will be described below with reference to one drawing. In Figure 1,
1 in the figure is a keyboard, which is used to key in the number and message of the person you are trying to call.
The output signal from the keyboard l is sent to the transmission control section 3 of the transmitting device 2.

At the time of transmission, the transmission control section 3 sends the number and message data to the BCH encoding circuit 4 to convert them into shortened Fragin code data. This shortened FREQUENCY 5HIFT code data is further processed by FSX (FREQUENCY 5HIFT
KEYING) is sent to the encoder 5, converted into actual transmission data, and supplied to the AC wiring 11 via the transmitter 6. The transmitter 6 modulates this transmission data into an electrical signal with a higher frequency than 50 Hz, superimposes it on the normal frequency of, for example, 50 Hz, and sends it to the building wiring 11.

The fluorescent lamps 7 and the like supplied with power from this wiring 11 are lit, and in addition to normal light emission, emitted light fluctuates at high frequencies.

People are holding watches 8 under this light.

Next, the circuit configuration of the wristwatch 8 will be explained with reference to FIG. A superimposed optical signal of 50 Hz and a high frequency signal is received.

The high frequency signal (including the number and message data) photoelectrically converted by the optical sensor 9 and the 50 Hz addition signal are amplified by the amplifier 12 of the receiver 10. Then, 50 Hz is cut by the band filter 13 and only the number data and message data signals modulated at high frequency are sent to the arithmetic circuit 1.
given to 4. Further, the signal detected by the arithmetic circuit 14 and turned into a data pulse is applied to an output block 15, where the waveform is shaped.This signal is outputted to an FSX decoder 16 and decoded. The decoded number and message data are subjected to BCH decoding in a BCH decoding circuit 17 and are provided to a reception control section 18. The reception control unit 18 determines whether the accident number (code) stored in the call code memory 19 matches the number data from the BCH decoding circuit 17, and if they match, sends a match signal to the clock circuit 20. The message data is also transferred to the clock circuit 20. Then, the clock circuit 20 activates the alarm section 21.
A notification is sounded to notify the person concerned and the message is displayed on a predetermined display section.

[Operation of the embodiment] Next, the operation will be explained with reference to FIG. 3(4)(a).

When calling a specific individual, the transmitting device 2 sends a call code previously registered for that individual to the AC wiring 11. The fluorescent lamp 7 lights up at 50H2, which includes the Takaoka wave component (data) h, as shown in Figure 3 (a) (the fluctuating light of the data component has a high frequency, so it is not perceived by humans).
When the light from the fluorescent lamp 7 hits the optical sensor 9 provided on the surface of the wristwatch 8, the output waveform shown in Figure (A) is obtained at the output end of the optical sensor 9. This is amplified by the amplifier 12, and only the high frequency component is extracted by the band filter 13 (Fig. 3 (0)
), the calling number data carried by this high frequency component is compared with the number data stored in the receiving side's calling code memory 19, and if they match, the alarm section 21 of the wristwatch 8 starts sounding and the person in question is notified that he/she has been called. You can know.

[Effects of the Invention] As explained in detail above, in this invention, the high-frequency signal sent from the transmitter to the power line causes the light of the fluorescent lamp supplied from the power line to be illuminated with high frequency, which can be used as a wristwatch. Since the data communication device receives data using a light sensor installed in the building, it is small and does not require an antenna, and can be received anywhere in a building with fluorescent lights. Since the power consumption of the receiving circuit is low, it does not affect the watch's battery life.If the optical sensor uses a solar cell, it can also be used as a power source. If it is built into a wristwatch, it is highly portable and can be easily disseminated.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment in which the present invention is applied to a wristwatch, FIG. 2 is a circuit diagram of a receiving device and a timepiece, and FIG. 3 is a waveform diagram for explaining the operation. 1... Keyboard, 2... Transmitting device,
3...Transmission control unit, 6...Transmitter, 7
...Fluorescent light, 8...Watch, 9...
... Optical sensor, 10... Receiver, 11...
...Wiring, 12...Amplifier, 13...
...Band filter, 16...FSK decoder, 17...BCH decoding circuit, 18...
・Reception control unit, 19... Calling code memory,
20...Clock circuit, 21...Alarm-1
, Department.

Claims (1)

[Claims] A transmission control means for high-frequency modulating a predetermined signal and transmitting it to a power line, an illuminator lit by the power line, a light sensor means for receiving light from the illuminator and detecting a high-frequency signal, and the light sensor means. and a reception control means for demodulating the high frequency signal detected by the data communication device.