KR0155054B1 - Automatic control apparatus for air-dome - Google Patents

Abstract

The present invention relates to an air dome automatic control device for automatically controlling an air dome according to an input signal of the sensor by installing a pressure sensor, a temperature sensor, an optical sensor, and the like in an air dome. It measures the pressure difference between the inside and outside of the air dome membrane using the pressure sensor installed inside, and controls the temperature by operating the heater with the signal of the continuous speed, discontinuous ON / OFF control function and temperature sensor using the measurement signal. It is characterized in that the function and the function of operating the lighting device by the signal from the light sensor are implemented by one microprocessor.

Description

Automatic control device of air dome

1 is a conceptual diagram of an air dome and an air dome automatic control device.

2 is a schematic diagram of an air dome automatic control device.

3 is a software flow chart of an air dome automatic control device.

* Explanation of symbols for main parts of the drawings

1: differential pressure pressure sensor 2: temperature sensor

3: illuminance sensor 4: signal amplifier

5: power monitoring device 6: A / D converter

7 processor supervision device 8 alarm device

9: PID controller 10: Time delay filter

11 microprocessor 12 thin-film key pad

13: Status monitoring liquid crystal monitor 14: Chattering prevention filter

15: state estimator 16: PWM generator

17: digital writer 18: digital clock

19: motor driver 20: power relay

21: blower 22: heater

23: illuminator

The present invention relates to an air dome automatic control device for automatically controlling an air dome according to an input signal of the sensor by installing a differential pressure sensor, a temperature sensor, an illuminance sensor inside an air dome.

In general, an air dome is a dome-shaped structure that maintains its appearance by blowing air into a pillarless membrane structure.

It is not only possible to install and recover faster than other structures, but also to be inexpensive, so it is suitable for large exhibition halls or large indoor sports facility structures.

The air dome features a blower to supply air and a revolving door to prevent air from leaking out.

The blower is rotated to increase the pressure inside the air dome and maintain its shape with the pressure difference from the outside.

However, the air dome pressure control device currently used on the market turns the fan on and off with a certain time interval by manual operation, which not only induces electricity consumption but also avoids noise caused by the sudden on / off of the fan. There is no problem.

In addition, in the case of a double-membrane air dome, maintaining a constant pressure inside the air dome according to a change in atmospheric pressure and a temperature change requires a high level of skill.

An object of the present invention is to provide an air dome automatic control device for automatically controlling the pressure, temperature, lighting, etc. of the air dome by complementing the problems of the conventional air dome pressure control device as described above.

In order to achieve the above object, the present invention measures the pressure difference between the inside and outside of the air dome by using a pressure sensor installed inside the air dome, and the continuous speed control of the blower using the measurement signal, discontinuous ON / OFF control function and Function to control the temperature automatically by controlling the heater by the signal by the temperature sensor, and control the lighting device driven by the power relay by the signal by the illuminance sensor, alarm function in case of abnormal condition or power off, and air dome status indication A function and a data input function are implemented by a microprocessor.

The present invention is a system for automatically controlling the blower by using a microprocessor to measure the pressure of the air dome to maintain a desired constant air pressure, the present invention will be described in detail below in connection with the accompanying drawings.

1 is a conceptual diagram of an air dome and an air dome control device, wherein the air dome automatic control device is composed of a pressure control device, a temperature control device, an ON / OFF function of an illumination control device, an alarm device at power off, and the like.

The differential pressure type pressure sensor 1 is installed through the inside and outside of the air dome wall to measure the pressure difference between the inside and outside of the air dome membrane by A / D conversion, and the PWM generator 16 having the chattering prevention filter 14 is installed. Install a processor monitoring device (7) using a counter to continuously control the blower (21) to monitor the state of the processor, and generate an alarm device (8) that generates an alarm sound when the pressure is lower than the specified threshold pressure. Built-in temperature condition estimator 15 for automatic adjustment of the control gain of the air dome in software, and for installing and using a user interface device for specifying and observing operating conditions using the keypad and LCD screen. It is installed in the sensor (2) and illuminance sensor (3) inside the air dome to measure this signal by A / D conversion and software by time delay filter (10) and state estimator (15) to prevent excessive signal conversion. And a control unit that connects the heater 22 and the illuminator 24 to a power relay driven by a digital output.

When explaining the separation of the function of the air dome control device of the above configuration as follows.

2 is a configuration diagram of an air dome control device. The pressure control method of the present invention measures a pressure difference between an air dome inside and an outside atmosphere by installing a differential pressure gauge on an air dome membrane, and amplifies the measured pressure. A / D conversion and signal processing in microprocessor.

Air dome pressure control method is a structure that outputs the result obtained by applying the PID controller to the measured pressure signal signal generation for driving the blower in the PWM method.

In order to prevent the possibility of chattering in a steady state, a software chattering filter was used.

Keypads were installed to arbitrarily adjust operating pressure settings, critical pressure values, and control gain variations depending on the characteristics of the air dome.

There are two control methods of the blower: speed control method and digital on / off control method.

The speed control method is a proportional differential integral (PID) automatic control method that supplies a PWM output signal to the inverter of the fan as a control input.The digital control method automatically controls the inverter of the fan by specifying the target pressure and dead band. That's the way it is.

Software is built into the microprocessor to adjust the controller gain of the double-membrane air dome as the temperature changes.

Thermometer side and illuminance measurement were implemented using A / D converter in the same way as pressure measurement, and heater for temperature control and lighting device for illuminance control are driven using power relay driven by digital output.

A temperature estimator with a time delay model is implemented in the temperature controller and the illuminance controller to prevent the on / off of the heater and the lighting device due to the rapid temperature change and the illuminance change.

The liquid crystal monitor is implemented to have a compact controller structure for displaying the current pressure and target pressure, and can display not only pressure but also time, temperature, and air dome status.

In order to realize the unmanned automatic control function, the built-in digital clock that operates even when the power is cut off can be used to control the heater, heater, lighting device, etc. within the designated time range.

If the power is cut off during the automatic control of the air dome or if the power is unstable, the alarm sound is built to prevent the dome collapse and evacuate.

The air dome of the present invention has a built-in processor monitoring function using a counter in case of an abnormality in the processor.

When the processor is operating normally, the counter is reset by toggling the digital output value at regular intervals, and when the processor is not operated for a predetermined time, the counter overflows and generates an alarm sound. It has a function to sound an alarm even when the air dome pressure drops below the critical pressure.

3 is a flow chart of the present invention, the operation of the present invention is a structure that can be operated at the same time as the power supply from the next time once the data for the control of the air dome, the function key for adjusting the parameters in the middle The control variable can be easily changed by manipulating.

Air dome automatic control system operates by controlling blower, heater, and fixture in Interrupt Service Routine at specified time interval and managing alarm by resetting counter of processor monitor.

The present invention by automating the air dome pressure, temperature, illuminance control device, compared to the air dome control device by manual operation to reduce the power consumption effect and prevent noise caused by excessive operation of the blower, air dome It can alleviate the burden on managers and control the pressure, temperature, and lighting control at once, contributing to the stability and quality of the air dome, which is growing in demand.

Claims (1)

In the automatic pressure control device of an air dome, a differential pressure pressure sensor (1) is installed through the inside and outside of the air dome and inputs it to the automatic control device, and the PWM generator having a chattering prevention filter (14) in the automatic control device. A built-in (16) to be connected to the blower 21 to be output, and a built-in processor monitoring device (7) using a counter to be connected to the output to the alarm device (8), a temperature state estimator (15), The heater 22 and the illuminator 24 are connected to the power relay to operate, and also connected to the input and output to the user interface device equipped with the keypad and liquid crystal display, and also the temperature sensor (2) and the illumination sensor (3) Installed in the air dome, the air dome automatic control device, characterized in that connected to the time delay filter 10 and the state estimator (15).