JPS5949041A - Physical state detector - Google Patents

Abstract

PURPOSE:To detect a physical state and to transmit and receive the data in the physical state, by unifying a data processing part comprising a physical state detecting element, converter, control part, etc. and a transmitting circuit, etc. CONSTITUTION:The physical state detectors such as a temperature sensor TS, humidity sensor HS, etc. have the data transmitting/receiving functions and can be connected to an air conditioning control part ACD via a common line. A polling signal coincident with each proper address is transmitted from the part ACD, and therefore the part ACD can collect individually the data fed from sensors TS and HS. These data can be connected only by a common transmission line L. At the same time, an actuator AT, a start/stop module SS, etc. which have similar functions are prepared. Thus it is possible to control a power plate PP by the actuator AT, a direct control valve MV, a control damper MD and the moduel SSM respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a physical state detection device for detecting a physical state such as a temperature sensor or a humidity sensor.

For example, in air conditioning control systems, conventional temperature sensors, humidity sensors, etc. only have the function of simply detecting temperature or humidity and sending it out as an electrical signal. When configured, it was as shown in the block diagram of FIG.

In other words, multiple connections are made between solid equipment CB such as computers and data collection panels DG P to DG Pn distributed at various locations through a common transmission path B, and each data collection panel DGP ,~DGPn are connected to the temperature sensor T and humidity sensor H1 for measurement individually, and the air conditioning control unit AO and the power panel PP for the air conditioner are connected to the temperature sensor T and the humidity sensor. The output of H1 is converted into a digital signal at the data collection boards DG P, ~DGPn.
In addition to h, a message is sent to the solid device OE, and the solid device oFi that receives it monitors it.

On the other hand, the AO control section calculates a control amount using the connected control temperature sensor T and humidity sensor H1, and operates the connected control valve MY and control damper MD.

Furthermore, the set values set in the solid equipment OE are sent to the air conditioning control unit AC via the data collection panels DG P1 to DGPn.
transmitted to. The on/off control signal determined by the middle mounting i0B passes through the data collection board DGP and is powered by 11pp.
transmitted to.

However, in such conventional systems, solid equipment O
C and data collection panels DG P, ~DGPn are connected by a common transmission path\, data collection panels DG
Between P1 to DGPn and temperature sensor T1 and humidity sensor H1, and between data collection panels DGP to DGPn and air conditioning control unit AO and power panel PP, and further between air conditioning control unit AO
and temperature sensor T8, humidity sensor H1, control valve MV1.
Between MV2 and control dyno<MDl 1MD, .MDs, each individual wiring is required, and the disadvantage is that the cost of wire material and the cost of wiring man-hours are high.

In addition, in the conventional system, the data collection panel DG
In addition to requiring P1 to DGPn, data collection panels DG of various formats are required depending on the number and type of devices connected to this.
PI-DG Pn must be prepared, and the mass production effect is diminished because they cannot be standardized, and these are expensive, resulting in the disadvantage that the system as a whole becomes expensive.

The present invention has the purpose of fundamentally eliminating the drawbacks of the conventional technology, and integrates a physical state detection element, a change @ public equipment, a data processing unit consisting of a city IJ control unit, etc., a transmission circuit, etc.
The present invention provides an extremely effective physical state detection device that is equipped with a data transmission/reception function as well as a physical state detection function.

The present invention will be described in detail below with reference to figures showing embodiments of an air conditioning control system, but for convenience, the system configuration to which the present invention is applied will be described first.

That is, as shown in the block diagram of FIG. 2, the physical state detection devices such as the temperature sensor T8 and the humidity sensor H8 according to the present invention have data transmission and reception functions, so the air conditioning control unit A
Since it is possible to connect to the OD via a common line and each has a unique address, a polling signal that matches this can be sent from the air conditioning control unit AOD from each temperature sensor T8 and humidity sensor H8. data can be collected individually by the air conditioning control unit AOD, and since these are connected only through a common transmission path, the cost of connecting wires and man-hour costs for wiring are significantly reduced. reduced to In addition, if actuator AT and start/stop module SSD, etc. with similar functions are prepared, they can all be connected via a common transmission path, and actuator AT can also be connected to direct control valve MY and control valve MY. Dan/<MD In addition, the start/stop module SSM can control the shift power board PP, so it is different from the conventional data collection board DG.
P.

It becomes possible to integrate the DGPn and the air conditioning control unit 0, and the system configuration is extremely simplified. Figure 3 is a block diagram showing an embodiment of the present invention. A nickel wire resistor is used as a detection element. A converter OV consisting of a film circuit BR and an analog-to-digital converter (hereinafter referred to as ADO) A/D is provided to detect the temperature of the body, etc.
The bridge circuit BR converts the change in resistance value corresponding to the temperature of the temperature detection element TD into a gating signal, and the output of this is converted into a digital signal by the mu DO and A/D. is given to the control unit ONT.

Since the output of the bridge circuit BR has nonlinearity with respect to temperature changes, the output of the ADO/A/D is linearized by calculation in the control unit ONT, and then transferred to the transmission circuit SR.
11 via the transmission circuit SR as temperature value data in response to a polling signal from the air conditioning control unit AOD.
It is sent to the control unit AOD.

The control unit ONT, which is composed of a microprocessor, a memory, an input/output circuit, etc., also has a data transmission/reception control function, and receives the address specified by the polling signal given via the transmission circuit sn. It compares the self-specific address set by the address setter A8 and transmits temperature value data in response to a match between the two.

In addition, the control unit ONT stores programs for various purposes in its memory in order to achieve common use through high-density integrated circuits, etc., and the programs in the memory are specified by the mode setter MS. It has become something that In the case of the sensor, the mode setting device MS sets the operating mode as a multi-temperature sensor.

Perhaps this is because an analog sensor is used as the temperature detection element TD in Fig. 3, but if the temperature detection element is one that outputs a large number of outputs to the oscillation circuit, there will be inherent characteristic deviations. In order to correct this, a zero setter C is provided, and a pulse generator PG that generates a ninth clock pulse that regulates the operation of the control section ONT is provided.
A display section DP is provided for indicating the temperature value determined by T.

The control unit ONT also sends information on whether the external contact S is on or off together with the temperature value data, and for this purpose, it can be connected to the contact St of an operating switch, etc. ing.

In this case, a three-wire transmission line is used, with line Li for signal and line L! is used for the power supply, and the line is used for common use.The power supplied from the lines Lt and Lm is stabilized by the power supply circuit ps, and then supplied to each part as a local power supply E.

The main functions of the control unit ONT are '5TA' when the power is turned on.
For RT', 1 initial processing to set the initial state to each part, 1it side processing such as importing the count value of the counter OUT and storing it in the memory, and importing the information of the contact S and storing it in the memory. 1 Contact information processing 11 Transmission processing for transmitting measurement data in response to a request from the central station;
and one-command processing, such as execution based on instructions from the central authority.
◎Figure 4 is a flowchart showing the details of the Qi transmission process.
After setting the received data to the transmission register, it enters a standby state to receive a signal from the air conditioning control unit AOD.
When the polling signal 7 is received, the polling signal 7 is judged by the code, and the address set by the address setter S and the address indicated by the polling signal are determined according to the yBs of the polling signal 7. 1 address match? I
After a good comparison, if this is YES, after preparing for transmission, the contents of the transmission register are sent to the transmission circuit 8R and east data transmission is performed, and one transmission is completed? 〃のY
Data transmission ends according to the ES.

In addition, it is preferable that the setting devices MS, 8.2, etc. in FIG. , a strap terminal, etc. may be used as well.

As shown in Figure 3, the contacts such as the pushbutton, operation switch, and motor status contact can be connected to the control unit ONT, and their on/off status is also stored in the memory during the air measurement process. 1 transmission station where the data is shown in Figure 4! ! It is to be sent at the time of.

In addition, as the temperature detection element TD, it is sufficient to use a crystal oscillator whose oscillation frequency changes according to the temperature, a thermistor, etc. whose electrical characteristics change according to the temperature, and when used as the humidity sensor H8. , a humidity detection element such as one formed with a counter electrode on the surface of an acrylic plate and coated with a lithium chloride solution is used, and the configuration of the converter Ov can be selected depending on the type of these elements. Thus, a sensor that detects various physical states can be obtained.

However, the operation of linearizing the nonlinearity of the detection element can be performed not only in the control unit ONT but also by inserting a linearization circuit into the converter OV.

In addition, the line L2. The power supply by Ls may be done by using a 2-wire transmission path, phantom power supply, or by using a separate power supply.
Wood brother F! The glaze of A can be freely modified.

As is clear from the above description, the present invention introduces a physical state detection device that can be directly connected to a control device.
This greatly simplifies the configuration of the 9-tone control system, heat source system, etc., reduces interconnection wire costs and wiring man-hour costs, and makes it easier to change or expand the entire system. Moreover, the entire system can be constructed at low cost, and it exhibits remarkable effects as a temperature sensor for various control systems.

[Brief explanation of drawings]

1st I\lid A block diagram showing a conventional air conditioning control system, Fig. 2 a block diagram showing an air conditioning control system to which the present invention is applied, Fig. 3 a block diagram showing an embodiment of the present invention, Fig. 4 1 is a flowchart showing details 111 of 1 transmission processing. TD...Temperature detection element, C■...Converter,
ONT...Control unit, SRII @...Transmission circuit, A
S...Fist address setting device. Patent applicant: Yamatake Honeywell Co., Ltd. Agent Masaki Yamakawa (II or 1 person) Figure 4-221-1

Claims (1)

[Claims] A detection element that detects a physical state, a converter that converts the detection force of the detection element into a digital signal, a transmission circuit that sends and receives data signals, and polling that specifies its own address via the transmission circuit. A physical state detection device comprising: a control unit that transmits a physical state indicated by the output of the converter via the transmission circuit in response to a signal.