JPS63253834A - Terminal controller - 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] [Objective of the Invention 1 (Field of Industrial Application) This invention relates to a terminal control device that controls the power supply of multiple terminals using a data line, and in particular, the present invention relates to a terminal control device that controls the power supply of multiple terminals using a data line. If you send a command to turn on the power to the terminal, an instant voltage drop from the voltage supply source may cause the terminal terminal equipment to malfunction, or a breaker on the voltage supply side may start, causing a system stoppage. The present invention relates to a terminal-based T111 device designed to prevent the above.

(Prior art) In recent years, public facilities such as hotels or areas have been identified and
CTV (Closed Circuit Television)
A data communication system such as a system has been set up to provide pay broadcasting as well as communication services such as security management at each user terminal.

FIG. 5 is a block diagram showing the main components of the above system, in which the management center is shown by a dashed line and each user terminal is not shown by a dotted line. The management center is a head-end computer 101. It consists of a modem 102, and user terminals (n in the figure) are connected to a path line 103 from the modem 102.
Data terminals (collectively referred to as 104) connected via
) 104-1.104-2. 304-n, and as a terminal device controlled by each data terminal 104 (7) TV receiver &1105-1.105-2. =105
-n (also 105 and 16). User number: 2
The data terminal 104 at the terminal transmits the TV receiver 105 i and II according to the downstream data from the management center through the pass line 103, and also transmits the viewing request data (response) made by the user or security information, etc. to the upstream data. Send as.

In addition, in the system shown in Figure 5, commercial exchange' to each terminal device is
A single pressure supply means is also shown. That is, in this system,
The AC voltage supply source 107 is common to each terminal, and is connected from a power line 108 to an outlet 108a, 108a,
... is extracted and supplied to the data terminal 104 and the TV receiver. Furthermore, the TV receiver 105 is configured to operate the auxiliary power switch 1 by using a keypad means such as a remote control.
06-1゜106-2.106-1"ON","OFF
"ON" and "OFF" of the power supply are controlled by "turning the power ON" and "OFF".

In such a system, the procedure for the management center to communicate with each terminal is to sequentially designate each data terminal 104 and request a response (hauling self-referencing method), and because the operation command is common to the terminals. Sometimes you may want to specify all terminals at once and send a command. An example of this is turning the power switch "ON'" and "OFF".
List the commands that control it.

FIG. 6 shows the format of transmission data in the above system.As shown in this figure, the downlink data from the tube Flt=inter to the data terminal 104 consists of an address part, a command part, a data part, an error check code part, For example, by inserting predetermined data into the address field,
It is possible to distinguish between the polling communication and the simultaneous communication. In the former case, the terminal is distinguished by setting a physical address unique to the terminal in the address field, and in the latter case, it is distinguished by setting a "0" address in the address field. When the rOJ address is set, for example, by inserting a command code to turn the power "ON" or "OFF 111'" into the command section, the power switch of the TV receiver 105 can be remotely controlled from each terminal at the same time. The power switch can be remotely controlled using, for example, a remote control switch 106 or a next-side power-off switch (not shown).

However, when communicating to turn on and turn off the power to all terminals at the same time as described above, all TV receiver R105s may be turned on at the same time. , it may be turned “OFF”, so
n when each TV reception Ia 105 is turned ON 11
A rush current twice as large flows through the power supply line 108. When an excessive current flows in this way, the power supply source 107 has a power supply impedance.

Due to the line impedance, the AC voltage applied to each terminal is momentarily reduced, and during this period, the data terminal 104 or the TV receiver gM 105 may malfunction, or the breaker means on the voltage supply side may malfunction. The rush current increases as the number of terminals n increases.
The larger the number of terminal devices requesting to turn on the power switch, the larger the number.

FIG. 7 shows an example system in which a data terminal is extended with Ia capabilities to control a plurality of termination devices 105. 109
-1, 109-2 and -109-n are data terminals 10
This is a switch that controls the power supply of multiple terminals i & δ 105 at the same time based on the simultaneous command received by terminal 4. As such a plurality of terminal devices, in addition to a TV receiver, refrigerators, electric water heaters, etc. can be considered.

Note that it is only necessary to control the power of all terminals at the same time, so by using a sequential communication method using polling and at least slightly shifting the command sending timing of the power supply 110N11, it is possible to control the power of all terminal devices at the same time. It is possible to prevent power from being turned on at the same time. However, in this case, since a terminal-specific address is set and a command is sent, polling for this purpose takes a long time, resulting in an increased burden on the management center.

(Problem to be solved by the invention) In a conventional system, when each terminal shares a voltage supply source, if all terminal terminals are turned on at the same time, the rush current causes a voltage drop. ,
There were problems in which data terminals malfunctioned or breakers on the voltage supply side tripped, causing the system to stop, making it impossible to operate smoothly.

The object of the present invention is to provide a terminal control device which solves the above-mentioned problems and allows uniform operation without causing inconveniences such as voltage drop and breakage of breakers.

[Structure of the Invention] (Step T: to solve the problem) This invention provides a method for turning on the power from the management center.
OFF” When a computer is received, timer processing is performed using the terminal-specific address as a reference time parameter.
This is to avoid the inconvenience caused by sharing the voltage supply source by providing an operation delay means for slowing down the actual power supply operations.

(Function) According to this invention, simultaneous e-mail from the management center is “ON”.
When a ``, OFF'' command is received, a timer operation is performed using the self-specific address of each terminal as a reference time parameter, and the power switch is prohibited from turning ON or OFF until a predetermined period of time has elapsed. J-ru so,
This prevents power from being supplied all at once to the terminal devices connected to the terminals, making it possible to prevent breakers from operating or malfunctions due to voltage drops.

(Example) Hereinafter, the present invention will be explained with reference to the illustrated embodiments.

FIG. 1 is a block circuit diagram showing an embodiment of a terminal control device according to the present invention.

In Figure 1, A is the management center, B-1゜B-2,
. . , are terminal devices, and both devices are connected via a path line 13. To the management center, head end computer 11. The modem 12 is configured with a modem 12.
Polling can be performed with each terminal B-1, 8-2, and so on via the terminal B-1, 8-2, and so on.

In this embodiment, each data terminal 14. of terminals B-1, 8-2, . ... is the power supply from management center 8.
Upon receiving the "ON", "OFF" (especially "ON") command, it performs a U-count operation based on the terminal's unique address, and turns on the actual power switch of the terminal equipment @15...
``This consists in configuring a means for delaying the operation by a different amount of time for each terminal.
-1 will be explained, and a plurality of other terminals have the same configuration.

141 is a terminal side modem corresponding to the modem 12 on the management center side, and both modems transmit data using a predetermined modulation/demodulation method. The modem 141 demodulates the downlink transmission data and outputs each baseband data 141a of the address section, command section, and error check code section explained in FIG. . The address comparator 142 is, for example, means for determining whether or not simultaneous communication is based on the "0" address.
The address data behind the baseband data 141a is used for comparison. Its second input terminal receives rOJ address data 1 from the f'OJ address storage unit 143.
43a is supplied.

The output data 141a from the modem 141 is also supplied to a first input terminal of another address comparator 145. This address comparator 145 is means for determining whether or not it is a unique address for itself, and its second input terminal is supplied with unique address data 144a from the self address storage unit 144.

When any of the above comparison means determines that the addresses match, the data in the command field and error check code field following the address field are transferred to the error detection circuit 146.1.
49. These error detection circuits 146.14
9 corrects and detects data errors using the data in the error check code section, and if no error occurs or if the error can be corrected, correct data is output from either of the error detection circuits 146 and 149. .

In the case of the error detection circuit 146, these outputs are supplied to the command processing circuit 148 via delay means 147,
In the case of the error detection circuit 149, the command processing circuit 148
supplied directly to

Now, the delay means 147 has the most unique configuration in this embodiment, and supplies the data from the error detection circuit 146 to the command processing circuit 148 after delaying it by a predetermined time.

This delay time is determined by address data 143a from the own address storage unit provided to delay means 147. Therefore, the delay time at each terminal is different.

The data thus input to the command processing circuit 148 causes the command processing circuit 148 to execute processing according to the contents of the command. As a result of decoding the above command, the power supply
0 N +1. Or if it is a “” OF F” command,
A signal Q148a is supplied to the relay switch 16. The relay switch 16 is controlled by the signal 148a,
Connect the voltage supply source 17 and each terminal? H source Klein 1
It is configured such that the power supply voltages of 8 and 8 can be connected and connected to the power outlet 21 for the TV receiver. As a result, the power plug 19
If the TV receiver 15 is plugged into the outlet 21, the power "ON" and "OFF" operations of the TV receiver 15 are controlled.
Note that the data from the error detection circuit 149 is a command specifying a terminal-specific address, so if the error detection circuit 149 determines that there is no data error, the response data (upstream data) is sent to the output circuit. 150 and sends it to the management center 8 via the modem 141.

On the other hand, a CGTV signal of a predetermined frequency is also transmitted from Management Center No. 8 via another cable. And CCTV
The signal is input to comparator 9151. converter 15
1, a local oscillator (path shown) is controlled by a PLL1 path 152, and a desired channel is received by inputting channel selection data to the PLL circuit 152 in the form of a frequency division ratio. The channel selection circuit 153 inputs the frequency division ratio data to the PLL circuit 152 using a key signal from a key switch 20 of a remote controller or the like. The reception output of converter 151 is TV receiver @ machine 1
5 for display processing. Note that the display 154 displays reception information such as reception channel number.

FIG. 2 shows an example of a specific circuit of the delay means 147. In FIG. 2, the same parts as in FIG. 1 are given the same reference numerals, and the circuit surrounded by dotted lines constitutes the delay means 147. Specifically, first, the error detection circuit 146 detects the command data 14 supplied from the address comparator 142.
When 6a is output, a signal 146b indicating the detection result is output to Jξ.
is outputting. The delay means 147 is composed of a latch circuit a and a counter b, and is configured so that the clock from the terminal C is passed through the counter b, and the latch circuit a is operated to output according to a predetermined threshold and an output d.

Note that address data from the own address storage unit 144 is input in parallel to counter b as initial value data. The error detection circuit 146 inputs and outputs the data 146a to the latch circuit a at the timing of the signal Q146b. The signal @146b is also used as a signal to clear the counter b, and the counter b starts counting the clock from the terminal C at the timing of the signal 146b.

In the system configured as described above, a command to turn on the power switch of the TV receiver 15 is sent to each terminal.
The operation in the case of simultaneous transmission will be explained.

FIG. 3 is a time chart showing the operation of the terminal in response to the above command. (a) shows the timing of transmission command data D, (b) -1° (b) -2, (b) -
3, the self-identical right address is, for example, Hamming distance [1
] The timing of the "ON" operation of the power switch (relay switch 16) in three different terminals is shown, respectively. As is clear from these figures, when each of the above terminals correctly receives the data after sending the command data, the terminal (b)-1 switches the relay switch 16 after one second.
is turned "ON", and the TV receiver 15 is turned on. Then, the terminal (b)-2 receives the data after t+Δ seconds, and the terminal (b)-3 receives the data after t+2Δ seconds.
Power is turned on to the receiver. In this way, by turning on the power to the terminal devices in each terminal at different timings, the voltage supply source 17 is not suddenly loaded with loads from all the terminals, preventing rush current, and increasing the power of the data terminal 14. This is to avoid malfunctions (although not shown, the data terminal 14 is constantly supplied with power from the voltage supply source 17) and system failure accidents due to breaker operation.

It should be noted that confirmation of whether or not all terminals have been turned on by power II ON 11 can be made by polling each terminal to confirm H-1 after the above-mentioned simultaneous communication.

In the above embodiment, as can be seen from the description of the specific circuit in FIG. 2, the latch circuit a is used as a delay element and the command processing circuit 148 is brought closer to the processing by delaying the cloak data itself. Met.

FIG. 4 shows a method in which a command to delay processing is directly given to the command processing circuit 148, rather than using the method using the data delay described above. In other words, the delay means according to this embodiment is a circuit that performs only timer processing.

Further, in the system of FIG. 4, a data terminal unit 114 corresponding to the data terminal 14 of FIG.
-1.15-2. The line structure is different in that it targets . . . 11. This corresponds to the system shown in FIG.

For this reason, the modem 141' of the data terminal unit 114
In addition to the function of exchanging data with management center A,
It has a function of transmitting a remote control signal to each terminal device 15-1, 15-2, . . . via a line 22. Also,
The tdem 141' separates and outputs an address field and a command data field.The address field is used as one input of the address comparator 142 for detecting a "0" address, and the command data is outputted via an error detection circuit 146. Command processing circuit 14
8 inputs.

The address comparator 142 outputs a timing pulse. This timing pulse is transmitted to the delay means 147- and the command processor 1! according to this embodiment. I! circuit 148
supplied to The delay means 147- inputs the unique address from the self-address storage unit 144 as an initial value for timer processing, and supplies a signal 0 for permitting command decoding processing to the command processing circuit 148 after one time has elapsed from the timer.

The command processing circuit 148 forms response data to the management center A, and processing of the command data is prohibited in response to the timing pulse J-. Then, by applying the signal q, J remote control data 148a- is formed and the data 148' is supplied to the modem 141'.

On the other hand, each terminal device 15-1.15-2. . . . is the remote control data 148a- from the above line 22 to the interface unit (hereinafter referred to as IFLI) 23-1.2
3-2. ..., and control is performed according to the contents of the command. In addition, each terminal equipment V11
5-1.15-2. ..., the respective power-on relay switches 16-1, 16-2, ... are the above IFs.
U23-1.23-2. “ON” by control signal from ...
”, “OFF” control II.

In addition, the code 21-1.21-2. . . is a power outlet, and the other configurations are the same as those in FIG. 1, so description thereof will be omitted.

With such a configuration, when the timing pulse is output from the address comparator 142 (-judgment that it is simultaneous transmission), the delay means 147' starts the timer operation based on the unique address data. At the same time, the command processing circuit 1
48 receives a command to decode the command data from the error detection circuit 146 by the timing pulse. When the delay means 147' has elapsed, a signal q for permitting decoding is inputted from the delay means 147'. In other words, the command processing circuit 148 does not immediately decode the command data even if it is input, but starts the decoding/remote control data creation process upon receiving the permission signal q from the d-delaying means 147'.

In this embodiment, the second delay means 147' has a specific configuration.
There is an advantage that only counter b in the figure can be constructed.

This invention prevents the generation of rush current when a plurality of terminals turn on their power switches at the same time.

J3, the above embodiment is just an example, and can be applied to systems with bus configurations other than the above systems.

Further, as a method of controlling the power switch, a primary side cutoff method of cutting off the voltage from the voltage supply source was adopted, but an auxiliary power switch controlled by a remote control or the like as explained in FIG. 5 may also be used.

[Effects of the Invention] As described above, according to the present invention, it is possible to avoid a situation in which a plurality of terminals turn on their power switches at the same time, thereby preventing terminal malfunctions or system failure accidents. It has the effect of being able to

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram showing an embodiment of the terminal interrogation device according to the present invention, FIG. 2 is a circuit diagram showing an example of a specific circuit of the delay means, and FIG. Time chart, FIG. 4 shows another embodiment of this invention.
The block circuit diagram, FIG. 5, and FIG. 7 are explanatory diagrams for explaining the prior art. 14... Data terminal, 16... Relay switch, 142... Address comparison product, 143... "0" address storage unit, 144...
- Self-address storage unit, 147...delay means. Procedure Ne City Official Book (Method) 11. Display of case Patent Application No. 279450 of 1985 2, Title of invention Terminal control device 3, Person making the amendment Relationship to the case Patent applicant representative Shu Aoi - 5, Date of amendment order April 26, 1988 Date (shipment date)] On page 20 of the Hokosho, lines 1 and 2, the text ``Figures 5 and 7'' has been corrected to ``Figures 5, 6, and figures''.

Claims (1)

[Claims] A plurality of terminals connected to a management center via a data line share a voltage supply source, and the management center controls the power of each terminal to turn on and off. In a terminal control device that sends command data all at once to control the power switches of each terminal, there is an address source that generates the address set for each terminal, and the power "ON" and "OFF" command data from the management center. A terminal control device comprising: an operation delay means for performing timer processing using the terminal address of the address source as a reference time parameter when receiving the terminal address, and delaying actual power ON and OFF operations.