JPH0955984A - Remote supervisory and control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a remote monitoring system whereby wiring reduction is realized and plural ventilating fans are controlled and monitored from a remote place. SOLUTION: Ventilating fan operating terminal equipments 2 and ventilating fan controlling terminal equipments 3 are connected to a multiplex transmission master set 1 with two transmission lines 4. Respectively independent address is set in the respective ventilating fan operating terminal equipments 2 and the respective ventilating controlling terminal equipments 3. When the multiplex transmission master set 1 receives a transmission signal Vs including operation data of the ventilating fans 6 from the ventilating fan operating terminal equipments 2, the transmission signal Vs including control data generated based on operation data is transmitted to the ventilating fan controlling terminal equipments 3 corresponding to the ventilating fan operating terminal equipments 2. The ventilating fan controlling terminal equipments 3 control the ventilating fans 6 based on the transmission signal Vs transmitted from the multiplex transmission master set 1 or the output signal of a humidity sensor 5 and also return monitoring data indicating the operation state of the ventilating fans 6 to the multiplex transmission master set 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring control system using time division multiplex transmission for remotely controlling or monitoring a ventilation fan.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, there is a ventilation fan control system for controlling a ventilation fan installed in a bathroom or the like. Such a ventilation fan control system includes the ventilation fan 6, a switch 17 for switching the ventilation fan 6 on / off, and a ventilation fan control device 18 for controlling the ventilation fan 6 based on an on / off signal input from the switch 17. The ventilation fan control device 18 controls the operation of the ventilation fan 6 by manually switching the switch 17.

In some cases, instead of the switch 17, a sensor for detecting humidity or the like is provided, and the ventilation fan control device 18 automatically controls the operation of the ventilation fan 6 based on a signal from the sensor.

[0004]

In the ventilation fan control system having the above structure, when the plurality of ventilation fans 6 are remotely controlled by using switches or sensors, the wiring length and the number of wires between each ventilation fan and the switches or sensors increase. However, there is a problem that wiring construction is difficult. The present invention has been made in view of the above problems, and an object of the present invention is to provide a wire-saving remote monitoring control system capable of remotely controlling or monitoring a plurality of ventilation fans.

[0005]

According to the present invention, in order to achieve the above object, an operation terminal device and a control terminal device are connected to a multiplex transmission master unit through a two-wire type transmission line to perform multiplex transmission. The master unit sends a transmission signal containing address data for individually calling each terminal device to the transmission line by time division multiplexing,
When the operation terminal and the control terminal are individually accessed and the operation data from the operation terminal is received during the signal return period provided in the transmission signal, the control data is generated based on the operation data and the operation data is transmitted. In the remote monitoring control system that transmits the control data to the control terminal corresponding to the generated operation terminal and controls the operation of the load based on the received control data in the control terminal, the status of the ventilation fan installation atmosphere is controlled. The ventilation fan is controlled based on the output signal from the sensor to be measured, and the ventilation fan control terminal device that transmits the monitoring data indicating the operation state of the ventilation fan to the master unit is provided. Ventilation fan can be automatically controlled based on the output signal of the, the operating status can be monitored remotely, and the wiring of the system can be reduced. Kill.

According to a second aspect of the present invention, in the first aspect of the present invention, a ventilation fan operating terminal device for transmitting the operation data of the ventilation fan to the multiplex transmission master unit during the signal return period provided in the transmission signal according to the operation of the operation unit. The master device transmits the control data generated based on the operation data to the ventilation fan control terminal device corresponding to the ventilation fan operation terminal device, and the ventilation fan control terminal device receives the control data based on the received control data. By controlling the ventilation fan, a plurality of ventilation fans can be controlled remotely.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a block diagram of a remote monitoring control system for remotely controlling or monitoring a plurality of ventilation fans according to an embodiment of the present invention. Here, first, an outline of the remote monitoring control system will be described.

Such a remote monitoring and control system is shown in FIG.
As shown in FIG. 3, the ventilation fan 6, a ventilation fan operation terminal device 2 for manually switching the operation state of the ventilation fan 6 and sending operation data corresponding to the switching operation to the multiplex transmission master device 1, and a ventilation fan operation terminal device 2 From the multiplex transmission master unit 1 that generates control data based on the operation data transmitted from the device and transmits the control data to the corresponding ventilation fan control terminal device 3, and detects the ambient humidity and outputs the output signal to the ventilation fan control terminal device 3. The humidity sensor 5 for outputting, the ventilation fan control terminal 3 for controlling the ventilation fan 6 based on the control data transmitted from the multiplex transmission master unit 1 or the output signal of the humidity sensor 5, and the drive power of the ventilation fan 6 for controlling the ventilation fan 6. It is provided with a commercial power supply 7 supplied to the terminal device 3 and a ventilation fan 6 controlled by an output signal of the ventilation fan control terminal device 3. The ventilation fan operation terminal device 2 and the ventilation fan control terminal device 3 are of a two-wire type. of It is connected to the multiplex transmission main unit 1 via the Ochsen 4. Further, the ventilation fan operating terminal device 2 and the ventilation fan controlling terminal device 3 are respectively preset with individual addresses, and the multiplex transmission master device 1 uses these addresses to control the ventilation fan operating terminal device 2 and the ventilation fan controlling terminal device 3. The terminals 3 can be individually recognized.

Here, the multiplex transmission master unit 1 sends out a transmission signal Vs having a format as shown in FIGS. Send and receive data to and from. That is, the transmission signal Vs is the start pulse ST indicating the start of signal transmission, the mode data MD indicating the signal mode, the address data AD transmitting the address for individually calling the ventilation fan operating terminal 2 or the ventilation fan controlling terminal 3. , A control data CD indicating the control contents to the ventilation fan 6, an error correction code CS such as checksum data for detecting a transmission error, a return period during which the ventilation fan operation terminal 2 or the ventilation fan control terminal 3 returns the return data Of the signal return period WT that sets the
V) is a time division multiplexed signal, and data is transmitted by pulse width modulation. When the address included in the address data AD of the transmission signal Vs received via the transmission line 4 matches the preset address, the transmission signal of each ventilation fan operation terminal 2 and the ventilation fan control terminal device 3 is transmitted. The control data CD is fetched from Vs, and the return data is synchronized with the signal return period WT of the transmission signal Vs and is used as a current mode signal (a signal that is short-circuited between the transmission lines 4 via an appropriate low impedance) and sent out. It is supposed to be returned.

On the other hand, the multiplex transmission master unit 1 is provided with a dummy signal transmitting means and an interrupt signal processing means. The dummy signal sending means always sends a dummy transmission signal in which the mode data MD is set to the dummy mode and the address data is cyclically changed. Further, the interrupt signal processing means, when receiving the interrupt signal Vi shown in FIG. 4 (c) generated in accordance with the operation of any one of the ventilation fan operating terminals 2, generates the interrupt signal Vi and outputs the interrupt signal Vi. Two
Is searched for, and the address set in the ventilation fan operating terminal 2 is returned as return data. Further, when the multiplex transmission master device 1 acquires the address of the ventilation fan operating terminal device 2, it accesses the ventilation fan operating terminal device 2 and returns the operation data of the ventilation fan 6 as return data.

As described above, the multiplex transmission master unit 1 acquires the address of the ventilation fan operating terminal device 2 which has generated the interrupt signal Vi, and the ventilation fan operating terminal device 2 receives the address from the ventilation fan operating terminal device 2.
When receiving the operation data of the
Control data CD to be transmitted to the ventilation fan control terminal 3 whose correspondence is preset based on the operation data, and a transmission signal V including the control data is generated.
s is time division multiplexed transmitted through the transmission line 4. Therefore, the ventilation fan 6 connected to the ventilation fan control terminal 3 is turned on / off or the air volume is controlled according to the control data CD.

In the ventilation fan operating terminal device 2 and the ventilation fan controlling terminal device 3, the transmission signal Vs transmitted on the transmission line 4 is full-wave rectified and stabilized to operate the internal circuit power supply. To get. Further, a commercial power source 7 for driving the ventilation fan 6 is separately input to the ventilation fan control terminal device 3. Now, FIG. 2 shows a block diagram of the ventilation fan control terminal device 3. The ventilation fan control terminal device 3 performs A / D conversion of the signal input from the humidity sensor 5 and outputs the signal to the CPU 11. Converter 10
And a transmission / reception circuit 16 for receiving the transmission signal Vs transmitted from the multiplex transmission master unit 1 via the transmission line 4 and returning the return data to the multiplex transmission master unit 1 in synchronization with the signal return period WT of the transmission signal Vs. And an address setting unit 1 for setting an address for individually recognizing each ventilation fan control terminal 3.
5, an automatic / manual switching unit 14 for switching the control system of the ventilation fan 6 to automatic or manual, and an output signal of the A / D converter 10 or the multiplex transmission master unit 1 by the control system set by the automatic / manual switching unit 14. The CPU 11 that calculates the control signal of the ventilation fan 6 based on the control data CD of the transmission signal Vs transmitted from the CPU 11, the inverter unit 12 that drives the ventilation fan 6 based on the control signal input from the CPU 11, and the transmission line 4 The transmission signal Vs being transmitted is full-wave rectified and stabilized to obtain a power source for operating the internal circuit, and a commercial power source (not shown) separately input for driving the ventilation fan 6 is supplied to the inverter unit 12. Power supply unit 8 and CPU
A non-volatile memory 9 for storing the processing content of 11 and a display unit 13 for displaying the operating state of the ventilation fan 6, humidity, and the like are provided.

The operation of the ventilation fan control terminal 3 will be described with reference to FIGS. 2 and 3. In FIG. 3A, when the power of the remote monitoring control system is input, the ventilation fan control terminal device 3 starts controlling the ventilation fan 6. First, in FIG. 3B, the CPU 11
Checks the setting of the automatic / manual switching unit 14, and the CPU 11 automatically controls the ventilation fan 6 based on the output signal of the humidity sensor 5 or manually controls the ventilation fan 6 based on the transmission signal Vs transmitted from the multiplex transmission master unit 1. Whether to control is selected.

When the automatic / manual switching unit 14 is set to manual control, that is, when the CPU 11 controls the ventilation fan 6 according to the operation content of the ventilation fan operation terminal 2, the multiplex transmission master unit 1 operates the ventilation fan. When the interrupt signal Vi shown in FIG. 4 (c) which is generated in accordance with the operation of the operating terminal device 2 is received, the address of the ventilation fan operating terminal device 2 which generated the interrupt signal Vi is processed by the above-mentioned interrupt signal processing means. Then, the operation data of the ventilation fan 6 is returned from the ventilation fan operation terminal device 2.

The multiplex transmission master device 1 generates control data to be transmitted to the ventilation fan control terminal device 3 corresponding to the ventilation fan operation terminal device 2 which has generated the interrupt signal Vi, based on the operation data, and also generates the control data. The transmission signal Vs containing the signal is sent to the transmission line 4. In the ventilation fan control terminal device 3, the address data A of the transmission signal Vs received by the transmission / reception circuit 16 is transmitted.
When D matches the address set in advance by the address setting unit 15, the CPU 11 fetches the control data CD from the transmission signal Vs.

The CPU 11 outputs the control signal of the ventilation fan 6 to the inverter unit 12 based on the control data CD, and the inverter unit 12 drives the commercial power source input from the power source unit 8 based on the control signal input from the CPU 11. The ventilation fan 6 is driven as a power source. Therefore, when the automatic / manual switching unit 14 is set to manual control, the CPU 11 is based on the control data CD included in the transmission signal Vs transmitted from the multiplex transmission master device 1 regardless of the signal from the humidity sensor 5. In addition to controlling the ventilation fan 6 by using the transmission / reception circuit 16, the monitoring data indicating the operating state of the ventilation fan 6 is returned to the multiplex transmission master device 1 in synchronization with the signal return period WT provided in the transmission signal Vs.

In this embodiment, the ventilation fan 6 is controlled manually by using the ventilation fan operation terminal 2.
The ventilation fan 6 may be timer-controlled by using a contact signal from a timer or the like. Next, when the automatic / manual switching unit 14 is set to the automatic control, that is, when the CPU 11 automatically controls the ventilation fan 6 based on the signal from the humidity sensor 5, the ventilation fan control terminal 3 uses A / The D converter 10 sequentially A / D-converts the signal from the humidity sensor 5 to obtain the current humidity T. The CPU 11 determines which humidity range the humidity T falls within in eight levels, and the control level x (x: 1 to 1 of the ventilation fan 6 depends on the humidity range including the humidity T.
Control is performed by switching 7) in 7 steps. That is, if the humidity T is within the humidity range of tx ≦ T ≦ t (x + 1) (tx: the lower limit value of the humidity range of the control level x, t (x +)
1): Lower limit of humidity range of control level (x + 1)), and the ventilation fan control terminal 3 controls the ventilation fan 6 at the control level x. Now, the operation of the ventilation fan control terminal 3 will be described assuming that the ventilation fan control terminal 3 controls the ventilation fan 6 at the control level x.

First, in FIG. 3c, the A / D converter 1
0 converts the input signal from the humidity sensor 5 into A / D and outputs it to the CPU 11. The CPU 11 samples the signal input from the A / D converter 10 to obtain the humidity T. Further, in d of FIG. 3, the CPU 11 determines whether or not the present humidity T obtained by sampling is within the humidity range of the control level x of the ventilation fan 6.

As a result of the CPU 11 judging the present humidity T in FIG. 3d, if the humidity T is lower than the humidity range of the control level x, that is, T <tx (tx: the lower limit of the humidity range of the control level x). Value), the control level x of the ventilation fan 6
By one step (e in FIG. 3) to reduce the air volume of the ventilation fan 6. At this time, when the control level of the ventilation fan 6 becomes less than 1 (f in FIG. 3), the control level remains 1 (FIG. 3).
G). When the control level of the ventilation fan 6 is lowered by one step, the CPU 11 generates the interrupt signal Vi and sends the monitoring data indicating the updated control level to the multiplex transmission master device 1 using the transmission / reception circuit 16 (FIG. 3 h).

Further, in FIG. 3d, when the CPU 11 determines the present humidity T based on the signal input from the A / D converter 10, when the humidity T is within the humidity range of the control level x, that is, , Tx ≦ T ≦ t (x + 1) (tx:
If the lower limit value of the humidity range of the control level x, t (x + 1): the lower limit value of the humidity range of the control level (x + 1), the CPU
11 continuously controls the ventilation fan 6 at the control level x (i in FIG. 3).

On the other hand, as a result of the CPU 11 judging the humidity range of the present humidity T in d of FIG. 3, the humidity T is the control level x.
Above the humidity range of, that is, t (x + 1) <T (t
In the case of (x + 1): the lower limit value of the humidity range of the control level (x + 1), the control level x of the ventilation fan 6 is increased by one step (j in FIG. 3) to increase the air volume of the ventilation fan 6. here,
When the control level of the ventilation fan 6 exceeds 7 (k in FIG. 3),
The control level remains at 7 (l in FIG. 3). When the control level of the ventilation fan 6 is increased by one step, the CPU 11
An interrupt signal Vi is generated, and monitoring data indicating the updated control level is sent to the multiplex transmission master device 1 using the transmission / reception circuit 16 (m in FIG. 3).

The CPU 11 outputs a control signal for the ventilation fan 6 based on the control level determined by the above-mentioned processing contents to the inverter section 12 to control the air volume of the ventilation fan 6,
Returning to c, the above processing is repeatedly executed. here,
The control data and the monitoring data of the ventilation fan 6 transmitted and received between the multiplex transmission master unit 1 and the ventilation fan control terminal device 3 are composed of 10-bit signals. However, in order to improve the reliability of the data, the signals have redundancy. Therefore, substantially only 8-bit data is used. In the control data, 1 bit of these 8 bits controls ON / OFF of the ventilation fan 6, and the remaining 7 bits.
The bit controls the air volume of the ventilation fan 6 in seven stages, each bit corresponding to each stage of the air volume of the ventilation fan 6. Also, in the monitoring data, 1 bit out of these 8 bits is the ventilation fan 6
The remaining 7 bits indicate the air volume of the ventilation fan 6 in 7 stages, each bit corresponding to each stage of the air volume.

When the multiplex transmission master unit 1 receives the monitoring data indicating the operating state of the ventilation fan 6 from the ventilation fan control terminal device 3, the operation of the ventilation fan 6 is displayed on the display section (not shown) of the ventilation fan operation terminal device 2. The control data for displaying the state is generated based on the monitoring data, and the control data is transmitted to the ventilation fan operating terminal 2 corresponding to the ventilation fan controlling terminal 3 that generated the monitoring data. When the control terminal 2 for the ventilation fan receives the control data from the multiplex transmission master unit 1, the control terminal 2 for the ventilation fan operates.
The operating state of the ventilation fan 6 is displayed on the display unit (not shown) based on the control data.

Therefore, by using the remote monitoring control system for remotely controlling or monitoring the plurality of ventilation fans as described above, the plurality of ventilation fans 6 can be remotely operated with reduced wiring, and the timer control and the central control can be performed. Since various control methods such as control and pattern control can be easily implemented without making a great change in wiring, the ventilation fan 6 can be efficiently controlled and power saving can be achieved.

[0025]

According to the present invention, in order to achieve the above object, the operation terminal device and the control terminal device are connected to the multiplex transmission master unit through the two-wire type transmission line, and By transmitting the transmission signal including the address data for individually calling the terminal device to the transmission line by time division multiplexing, the operation terminal device and the control terminal device are individually accessed and operated during the signal return period provided in the transmission signal. When receiving the operation data from the operation terminal, the control data is generated based on the operation data, the control data is transmitted to the control terminal corresponding to the operation terminal that generated the operation data, and the control terminal is Then, in the remote monitoring control system that controls the operation of the load by the received control data, the ventilation fan is controlled based on the output signal from the sensor that measures the state of the installation atmosphere of the ventilation fan, and the ventilation fan Equipped with a ventilation fan control terminal that transmits monitoring data indicating the operation status to the master unit.The ventilation fan control terminal controls the ventilation fan based on the output signal from the sensor, and remotely monitors the operating status. There is an effect that can be done.

According to the second aspect of the present invention, there is provided a ventilation fan operating terminal device for returning the operation data of the ventilation fan to the multiplex transmission master unit during the signal return period in which the operation data of the ventilation fan is provided in accordance with the operation of the operation unit.
Multiplex transmission The master unit transmits the control data generated based on the operation data to the ventilation fan control terminal device corresponding to the ventilation fan operation terminal device, and the ventilation fan control terminal device controls the ventilation fan based on the received control data. By doing so, it is possible to remotely control a plurality of ventilation fans.

[Brief description of drawings]

FIG. 1 is a block diagram showing the present embodiment.

FIG. 2 is a block diagram of the same.

FIG. 3 is a flowchart diagram of the above.

FIG. 4 is a signal explanatory diagram of the transmission signal of the above.

FIG. 5 is a block diagram showing a conventional example.

[Explanation of symbols]

 1 Multiplex transmission master unit 2 Ventilation fan operation terminal device 3 Ventilation fan control terminal device 4 Transmission line 5 Humidity sensor 6 Ventilation fan

Claims (2)

[Claims] 1. An operation terminal and a control terminal are connected to a multiplex transmission master unit via a two-wire transmission line, and the multiplex transmission master unit transmits data including address data for individually calling each terminal unit. By transmitting the signal to the transmission line by time division multiplexing,
When the operation terminal and the control terminal are individually accessed, and the operation data from the operation terminal is received in the signal return period provided in the transmission signal, the control data is generated based on the operation data, In the remote monitoring control system for transmitting control data to the control terminal device corresponding to the operation terminal device that generated the operation data, and controlling the operation of the load by the received control data in the control terminal device,
A ventilation fan control terminal for controlling the ventilation fan based on an output signal from a sensor that measures the state of the installation atmosphere of the ventilation fan and transmitting monitoring data indicating the operating state of the ventilation fan to the multiplex transmission master device is provided. A remote monitoring and control system characterized by comprising: 2. A ventilation fan operation terminal device for transmitting the operation data of the ventilation fan to the multiplex transmission master unit according to the operation of the operation section during a signal return period in which a transmission signal is provided, and the multiplex transmission master unit is provided with the ventilation fan. The control data generated based on the operation data is transmitted to the ventilation fan control terminal corresponding to the operation terminal, and the ventilation fan control terminal controls the ventilation fan based on the received control data. The remote monitoring and control system according to claim 1.