Simultaneous data and electric power transmitting/receiving system

• US 5,003,457 A
• Filed: 12/28/1988
• Issued: 03/26/1991
• Est. Priority Date: 12/29/1987
• Status: Expired due to Fees

• Current Assignee: Hitachi Chemical Company Limited (Resonac Holdings Corp.)
• Original Assignee: Hitachi Chemical Company Limited (Resonac Holdings Corp.)
• Inventors: Noguchi, Takeshi, Hashimoto, Masahiko, Ikei, Mitsuru
• Primary Examiner(s): MacDonald, Allen R.
• Application Number:
  US07/291,135
• Time in Patent Office: 818 Days
• Field of Search: 340/825.65, 340/825.28, 340/825.29, 340/310 R, 340/310 A, 370/100.1, 364/133
• US Class Current: 700/4
• CPC Class Codes: G08C 15/00 Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
• CPC Class Codes: H04L 12/2803 Home automation networks
• CPC Class Codes: H04L 12/2838 Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths adaptations of television systems for transmission by electric cable for domestic distribution H04N7/106; hybrid transport H04L12/6418; home network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 2012/2843 Mains power line
• CPC Class Codes: H04L 2012/285 Generic home appliances, e.g. refrigerators
• CPC Class Codes: H04L 25/02 Details ; arrangements for supplying electrical power along data transmission lines systems for transmitting signals via power distribution lines H04B3/54
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 20/20 End-user application control systems

Abstract

A data and power transmitting/receiving system applicable to a home automation system. Plural terminal units and associated communication units are connected via a common signal bus. Each terminal unit may operate an electrical load to be controlled remotely, and may include control switches for operating such loads at a number of remote locations. Each communication unit generates an n-bit data signal, each bit corresponding to the desired function of a corresponding terminal unit. A sync signal is combined with the data signal in time sequence such that the respective communication units can identify which signal operates which terminal unit. The sync signals also can supply DC power to ther respective communication units.

Claims

1. A data and power transmitting/receiving system comprising:

a plurality of terminal means (20A . . . 20N) selectively operable for producing specific data (40) for utilization by the respective terminal means;

a plurality of communication means (10A . . . 10N) connected to the corresponding terminal units, including;

at least a sync signal generator for generating a sync signal and superimposing the sync signal on the specific data in a time-division mode to produce a data signal (45), and

a data processing unit (4A . . . 4N) operative for processing the data signal to determine a controlling condition of the respective terminal means (20A . . . 20N) and for producing power for driving the data processing units; and

a common signal transmission line (30) for connecting said plurality of communication means so as to communicate the data signal with the communication means, whereby simultaneous data transmission and reception are carried out between the communication means.

2. A data power transmitting/receiving system as claimed in claim 1, wherein each of said terminal means includes:

a plurality of switches (72a . . . 72d) operative to generate data signals to which the respective terminal means is responsive so as to produce the data signal, and

a lamp (71a . . . 71d) corresponding to one of the switches included with each terminal means and operated in response to a data signal generated by operation of that switch at any of the terminal means.

3. A data and power transmitting/receiving system as claimed in claim 2, further comprising a plurality of display unit (18) each including a plurality of light emitting diodes operative to indicate which of the lamps (71a . . . 71d) is illuminated.

4. A data and power transmitting/receiving system as claim in claim 3, wherein each of said communication means includes:

means (11) for generating a sync signal (50) at a predetermined time interval to determining a starting instant of both data transmission and reception;

means (12) responsive to the sync signal for determining whether or not the sync signal is transmitted prior to the specific data (40);

means (13) for transmitting the specific data and sync signal as the data signal (45) via the common signal transmission line (30) to other communication means;

means (14) for demodulating the data signal received via the signal transmission line from other communication means;

means (15) for discriminating the specific data from the sync signal; and

means (16) connected between the terminal means (20A . . . 20N), transmitting means (13), demodulating means (14), and discriminating means (15), for processing the sync signal and data to control the terminal means, whereby the simultaneous data transmission and reception are carried out between the communication means (10A . . . 10N).

5. A data and power transmitting/receiving system as claimed in claim 4, wherein said processing means includes;

data conversion means (17) connected between the corresponding terminal means (20A,

     10) and the transmitting means (20A . . . 20N) and transmitting means (13) for converting said specific data (40) derived from the switches of the corresponding terminal means into a discriminatable data form;

data decrypting means (20) for decrypting the data signal demodulated by the demodulating means to produce a decrypted data signal;

display controlling means (23) responsive to the decrypted data signal for controlling the display unit (18A) to display the decrypted data signal thereon; and

means (21,

     24) responsive to the decrypted data signal for determining whether or not a control signal is supplied to the lamp (71A . . . 71D) of the corresponding terminal means (24A).

6. A data and power transmitting/receiving system as claimed in claim 1, wherein said common signal transmission line is constructed of two lines.

7. A data and power transmitting/receiving system as claimed in claim 1, wherein said sync signal generator is constructed of a clock signal generator (69) and a frequency divider circuit (70) for frequency-dividing the clock signal to obtain said sync signal (50).

8. A data and power transmitting/receiving system as claimed in claim 1, wherein the voltage level of said sync signal (50) is higher than that of said specific data (40).

9. A data and power transmitting/receiving system as claimed in claim 1, wherein each of said communication means includes a power source circuit (70) having a rectifer operative to rectify the sync signal and a capacitor operative to receive and store the rectified sync signal therein to produce DC power.

10. A data and power transmitting/receiving system as claimed in claim 1, where each of said terminal means includes:

a plurality of actuators A (503 . . .

     505) operative to control corresponding plural loads,

a plurality of sensors B (507 . . .

     509) responsive to predetermined conditions affected by operation of the corresponding loads, and

at least one data communication circuit C(515/516/517) connected to a selected actuator and to the sensor responsive to the predetermined condition of the corresponding load;

each of said communication means includes;

a control panel (502), and

a control unit (520) connected to the control panel; and

said common signal transmission line comprises a power/data communication line (521) connected to the control unit and to the data communication circuits and selectively operative to supply electrical power to operate the actuators as well as communicating signals with respect to the sensors.

11. A data and power transmitting/receiving system as claimed in claim 10, wherein said control panel includes;

a transistor (529);

a light emitting diode (53) connected to the collector of the transistor; and

a switch (527) for turning ON/OFF said control unit (520), whereby the light emitting diode is turned ON/OFF in response to switching operations of the switch.

12. A data and power transmitting/receiving system as claimed in claim 10, wherein said control unit includes a first microprocessor (523) for processing the specific data (40) so as to obtain the data signal (45) to be transferred.

13. A data and power transmitting/receiving system as claimed in claim 10, wherein said data communication circuit (524) employed in said terminal means includes a second microcomputer (528) for processing the data signal transferred from the control unit (520) so as to obtain the specific data for controlling said actuators and for processing output signals derived from said sensors (507, 508, 510 . . . 519) in order to obtain sensor signals to be transferred to said communication means.

14. A data and power transmitting/receiving system as claimed in claim 1, wherein said plurality of communication means (10A . . . 10N) are connected to said common signal transmission line (30) in such a manner that connecting said communication means establishes a wired-OR logic circuit in conjunction with said transmission line.