JPS63135096A - Centralized supervisory equipment for humidity - Google Patents

Abstract

PURPOSE:To simplify the system constitution and to reduce the cost by incorporating a humidity measuring circuit to a humidity supervisory terminal equipment, rectifying and smoothing a transmission signal sent from a central supervisory equipment and providing a power supply circuit forming the power supply for the terminal equipment circuit and the humidity measuring circuit into the humidity supervisory terminal equipment. CONSTITUTION:A central supervisory equipment 1 accesses each humidity supervisory terminal equipment 3 sequentially and sends a transmission signal Vs to return the measured humidity data by the humidity measuring circuit 2 and the measured data is returned during the return period set by the transmission signal Vs from the humidity supervisory terminal device 3. In the humidity centralized supervisory equipment as above, the humidity measuring circuit 3 is built in the humidity supervisory terminal equipment 2 and the power supply circuit 6 giving a power to the terminal equipment circuit and the humidity measuring circuit 3 is provided in the humidity supervisory terminal equipment 2 while rectifying and smoothing the transmission signal Vs sent from the central supervisory equipment 1. Thus, it is not required to prepare a separate power supply to energize the circuit 2, then the system constitution is simplified.

Description

[Detailed Description of the Invention] [Technical Field 1] The present invention allows humidity data to be sent back to a central monitoring device via a humidity monitoring terminal and a signal line, so that the central monitoring device centrally monitors humidity at multiple locations. This invention relates to a humidity central monitoring device.

[Background Art] Conventionally, this type of humidity central monitoring device sends humidity data back to a central monitoring device via a humidity monitoring terminal and a signal line, and the central monitoring device centrally monitors humidity at multiple locations. , as shown in the third leap, the central monitoring device 1 and a plurality of humidity monitoring terminals 3 to which the humidity measuring circuit 2 is connected are connected by signal #X4, and the central monitoring device 1 is connected to each humidity monitoring terminal device. 3 is sequentially accessed to transmit the transmission signal V3 for returning the humidity data measured by the humidity measuring circuit 2, and at the same time transmit the measured data from the humidity monitoring terminal 3 during the return period set by the transmission signal Vs. I was supposed to send it back. Figure 4 (LL) is central monitoring! It indicates the transmission signal VS sent from the A station 1, and includes a start signal ST indicating the start of transmission, an address data signal AD transmitting the unique address of the humidity monitoring terminal 3, and a digit designation of the humidity data to be returned. It is composed of a control data signal CD that transmits data and a return period setting signal WT that sets a return period, and is a pulse width modulated bipolar signal (±24V).
It becomes. On the other hand, as shown in FIG. 4(b), the return signal VB sent back from the humidity monitoring terminal 2 is a current mode signal (a low resistance is connected between the signal lines 4) in synchronization with the return period setting signal WT. It is designed to be sent back as a signal obtained by

By the way, the humidity measurement signal output from the temperature measurement circuit 2 is an analog signal of 0 to 5 mA and 4 to 20 mA, and this humidity measurement signal is input to the analog input terminal of the humidity monitoring terminal 3, The humidity measurement signal is converted into a digital signal in the controller 3, and when accessed from the central monitoring device 1, the digit data of the A/D converted humidity data specified by the control data is The information is sent back to the monitoring device 1. However, in such a conventional example, a separate power supply is required to supply power to the humidity measuring circuit 2, which complicates the system configuration and increases costs.
Since they were separate, there was a problem in that construction was time-consuming.

[Objective of the Invention 1 The present invention has been made in view of the above points, and its purpose is to provide a centralized humidity monitoring system that has a simple system configuration, can reduce costs, and is easy to install. The goal is to provide equipment.

[Disclosure of the Invention J (Embodiment) fjS1 Figure shows an embodiment of the present invention, in which a central monitoring device 1 and a plurality of humidity monitoring terminals 3 to which humidity measuring circuits 2 are connected are connected by a signal M4. and a transmission signal V for sequentially accessing each humidity monitoring terminal device 3 from the central monitoring device 1 and returning the humidity data measured by the humidity measuring circuit 2.
In the humidity centralized monitoring device similar to the conventional example, in which the humidity monitoring terminal 3 transmits the humidity measurement data s and also sends back the measurement data during the return period set by the transmission signal Vs, the humidity monitoring terminal 2 transmits the humidity measurement data to the humidity monitoring terminal 2. In addition to incorporating the circuit 3, the transmission signal VS transmitted from the central monitoring device 1 is '! i! Is it possible to clean the terminal device circuit 2a and form the power supply for the humidity measuring circuit 3? lt source circuit 5 to humidity monitoring terminal 2
It is set up inside. Figure @2 shows a specific circuit example of the humidity monitoring terminal 2. The humidity measuring circuit 2 includes a constant voltage circuit IC consisting of a 3-terminal regulator, and an inverter circuit 1.
1 to I, and an operational amplifier OP; and a sensor drive circuit 2a, and a resistance-voltage circuit consisting of an operational amplifier OP, which converts a resistance change of the humidity sensor PH into a voltage change, to OP3. It is formed by a conversion circuit 2b. In addition, temperature compensation of the humidity sensor PH is performed by a temperature correction thermistor TH, and the volume VR is adjusted to 0, and the volume VR,
In the example, the humidity level is adjusted at
Corresponding to ~100%, a voltage of 0 to 1 is output as a humidity measurement signal. The terminal circuit 5 includes an address setting dip switch SW1 and a signal processing circuit IC3.
, a transmission control circuit 5a consisting of a latch circuit IC, and a transistor Q1, and a signal conversion section 5b consisting of an A/D converter IC3 and a constant voltage circuit ICa. The power supply line 6 also includes a transmission signal processing circuit IC that rectifies and smoothes the transmission signal Vs to form a terminal power source Voo (5■), and separates and extracts a signal input to the signal processing circuit IC1; The constant voltage circuit IC2 is composed of a three-terminal regulator that constants the DC voltage output from the processing circuit IC and forms a humidity measurement power supply Vcc (8,6 V).

Note that the transmission signal processing circuit 5a also includes a return circuit that connects a low resistance to the signal line A and sends out a return signal VB.

The operation of the embodiment will be described below. Now, the central monitoring device 1 accesses each humidity monitoring terminal 3 to which a unique address has been set, and the humidity measuring circuit 2 is accessed from the humidity monitoring terminal 3.
Each digit of the humidity data measured by the sensor is transmitted. Here, in the humidity monitoring terminal 3, the signal processing circuit IC3 of the transmission control circuit M5a of the terminal circuit 5 uses the unique address set by the dip switch SW and the transmission signal Vs inputted via the SIG terminal. The transmitted address data is compared with the transmitted address data, and when an address match is obtained, the control data transmitted by the transmission signal VS is taken in and outputted to the control output terminals OUT, -0UT5, and the monitoring input terminals IN, ~ RE the return signal that returns the digit data of the humidity data input to IN.
It is designed to output to the Tfl child. In the example, A
/D converter■C2 has a full scale of 2■(0~
1,999), but considering the measurement accuracy of the humidity measurement circuit 2, there is no meaning below the decimal point, so the humidity measurement signal is set to 0 to 0.1■, and the A/D converter T
C. The lower three digits of the output are sent back to the central monitoring device 1 as humidity data (0 to 100%). For example, when the humidity is 50%, the humidity measurement circuit 2 returns 0.05
V is output, and the lower three digits of l"0050J output from the A/D converter IC are transmitted as humidity data.

In this case, the digit data specified from the central monitoring device 1 by the control data of the transmission signal Vs is the NAND circuit N1 to N6.
, transistor Q, and latch circuit IC1 are selectively input to monitoring input terminals IN, .about.IN. Therefore, the central monitoring device 1 can directly read the humidity (in % display) by displaying the humidity data returned from the humidity terminal 3 after three accesses.

By the way, in the embodiment, the power supply for the terminal device circuit 5 and the humidity measurement circuit 2 is formed by rectifying and smoothing the transmission signal Vs in the power supply circuit 6, and the humidity measurement circuit 2 is formed by rectifying and smoothing the transmission signal Vs. Since there is no need to prepare a separate power source to supply power to the system, the system configuration is simplified, costs can be reduced, and construction is easier. In the embodiment, each IC circuit of the humidity measuring circuit 2 is formed using C-MOS to save power. Further, by providing a temperature monitoring terminal similar to the humidity monitoring terminal 3, it is possible to obtain a discomfort index in the central monitoring device 1, and optimal air conditioning control can be performed.

Effects of the Invention 1 As described above, the present invention connects a central monitoring device and a plurality of humidity monitoring terminals to which humidity measuring circuits are connected by a signal line, and connects each humidity monitoring terminal from the central monitoring device. Humidity device that transmits a transmission signal for sequentially accessing and returning the humidity data measured by the humidity measurement circuit, and also returns the measurement data from the humidity monitoring terminal during the return period set by the above transmission signal. In a centralized monitoring device, a humidity measuring circuit is built into the humidity monitoring terminal device, and a power supply circuit that rectifies and smoothes transmission No. 43 transmitted from the central monitoring device to form the source of the terminal device circuit and the humidity measuring circuit is connected to the humidity measuring circuit. Since it is installed in the monitoring terminal and there is no need to separately prepare a power source for the humidity measuring circuit, the cost can be reduced and construction can be made easier.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of the main parts of the same, FIG. 3 is a schematic diagram of a conventional example, and FIG. 4 is an explanatory diagram of the operation. 1 is a central monitoring device, 2 is a humidity measuring circuit, 3 is a humidity monitoring terminal, 4 is a signal line, 5 is a terminal circuit, and 6 is a power supply circuit.

Claims (1)

[Claims] (1) Connect the central monitoring device and multiple humidity monitoring terminals to which humidity measurement circuits are connected using signal lines, access each humidity monitoring terminal sequentially from the central monitoring device, and measure using the humidity measurement circuit. In a humidity centralized monitoring device, the humidity monitoring terminal transmits a transmission signal for returning measured humidity data, and also sends back measurement data from the humidity monitoring terminal during a return period set by the transmission signal. The humidity monitoring terminal is characterized by having a built-in humidity measuring circuit and a power supply circuit that rectifies and smoothes the transmission signal transmitted from the central monitoring device to form a power source for the terminal circuit and the humidity measuring circuit. Humidity central monitoring device.