How Is The Building Automation System Composed? What Are The Functions?

The building automation control system can automatically control the electromechanical equipment in the building. Through software, it is possible to systematically manage interrelated equipment, give play to the overall advantages and potential of the equipment, improve equipment utilization, and optimize the operating status and time of the equipment. This can extend the service life of the equipment, reduce energy consumption, reduce the labor intensity and working hours of maintenance personnel, and ultimately reduce the operating cost of the equipment.

Access Control System

Integrated Garage Management System

Energy Saving and Energy Control System

VAV System

Elevator Control System

Lighting and Power System

Supply and Distribution System

Water Supply and Drainage System

HVAC Fresh Air Air Conditioning Control System

Cold and Heat Source and Its Water System

AV System

Automatic Fire Alarm System

Centralized Metering System

Online/Satellite TV System

TV Monitoring System

Emergency Broadcast System

All systems need a PANEL PC to support all functions. Regularly:

7-inch Android Panel PC

10.1-inch Android Panel PC

OR

15-inch Windows Panel PC

21.5-inch Monitor

OR

7-inch 1000nits Anti-glare Embedded Monitor

10.1-inch 1000nits Anti-glare Embedded Monitor

The building automation system consists of the following parts:

1) Monitoring of building equipment operation management, including HVAC system monitoring (HVAC); drainage system monitoring; air supply and exhaust system monitoring; power supply and distribution and lighting system monitoring; elevator operating status monitoring; cooling and heating source system monitoring.
2) Fire alarm and fire control linkage control, elevator operation control.
3) Public security technical protection, including video surveillance system; anti-theft alarm system; entrance and exit control and access control system; security personnel inspection system; garage integrated management system; various important warehouse prevention facilities; security broadcast information system.
Many electromechanical devices are inherently interconnected, so complete automation management is needed. Establish an electromechanical equipment management system to achieve comprehensive management, scheduling, monitoring, operation, and control of electromechanical equipment.

Many electromechanical devices are inherently interconnected, so perfect automation management is needed. Establish an electromechanical equipment management system to achieve comprehensive management, scheduling, monitoring, operation and control of electromechanical equipment.

1. Management Purpose

Automatic control, monitoring, and measurement are the three major elements of building equipment management. Its purpose is to correctly grasp the operating status, accident status, energy consumption, and load changes of building equipment. Especially after the use of electronic computers, both manpower and energy can be greatly saved. It is generally believed that 25% of energy can be saved.
According to the Technical Report of the Japanese Electrical Society: The effect of using the electronic computer management system is compared with the effect of not using it, and maintenance personnel can be reduced by about 30%. The energy-saving mentioned here is the energy-saving method adopted on the highest utilization rate of necessary energy. The methods used in this operation control mainly include: effective operation of the machinery; changing the conditions of indoor temperature and humidity; controlling the illuminance; controlling the operation time of the equipment to a minimum; reducing the intake of outdoor air, etc. The electrical consumption rate in a building accounts for 70-90% of the entire energy consumption, so energy saving should first start from the electrical aspect to reduce electrical energy consumption.

2. Managment Objects

The management objects of construction equipment are mainly electrical equipment, air-conditioning equipment, and sanitary equipment.
1) Electrical equipment: The management of electrical equipment mainly monitors the operating state of the machinery, measuring points and protection devices. The main object of management is to monitor the status of circuit breakers, transformers, contactors, fuses, capacitors, etc. of each power distribution system. The measurement is mainly to measure the current, voltage, active power, reactive power and power factor of the power system.
2) Air-conditioning equipment: The management of air-conditioning equipment should monitor the status of refrigerators, air conditioners, water pumps, etc.; measure temperature and humidity, and regulate the temperature and flow of the cold and heat sources required by the air-conditioning system.
3) Sanitary equipment.

3. Control Function

The automatic control of the building’s construction equipment is centered on air-conditioning control. The automatic control of air-conditioning equipment belongs to the automatic adjustment of the general thermodynamic process. The automatic adjustment of the air conditioning system has the following advantages:
1) For productive buildings, it can improve the control accuracy of temperature and humidity, and improve product quality. For residential and commercial buildings, it mainly improves people’s comfort.
2) The energy (hot or cold) can be increased or decreased to the system according to the change of the adjusted amount, so energy consumption can be reduced and energy can be saved.
3) The labor intensity can be reduced.

4. Automatic Adjustment of Air Conditioning Unit

The control system adopts DDC control. The temperature detected by the temperature sensor installed in the return air pipe is sent to the DDC controller for comparison with the set point temperature. The proportional integral and differential control are used to output the corresponding voltage signal. The control is installed in the return The action of the electric regulating valve on the water pipe keeps the return air temperature within the required range.
The humidity detected by the humidity sensor installed in the air supply pipe is sent to the DDC controller to compare with the set point humidity, and the proportional integral control is used to output the corresponding voltage signal to control the action of the electric steam valve to keep the air supply humidity at the desired level. The required range.
The temperature and humidity detected by the humidity and humidity sensors installed in the supply air duct and the fresh air duct are sent to the DDC controller for return air and fresh air enthalpy calculations, and the corresponding voltage signals are output according to the ratio of the return air and fresh air enthalpy values. Control the proportional opening of the return air damper and the fresh air damper to save energy in the system.
1) All the detection data of the system can be displayed on the display screen, such as: the temperature and humidity of fresh air, return air, supply air, filter blockage alarm, fan on and off status.
2) Through the pre-written logic program in the DDC controller, the system can perform the following interlocking functions: the air door installed at the fresh air inlet is interlocked with the fan, when the fan stops, the fresh air damper is fully closed; the electric regulating valve and the fan start interlocking, When the fan stops, the electric regulating valve is also closed at the same time; the start and stop status of the fan is detected by the differential pressure switch. When the fan starts, when the differential pressure on both sides of the fan exceeds its set value, the normally open contact in the differential pressure opening coffin is closed, the signal is sent to the DDC controller, and the control program of the system is immediately put into operation.
3) Through the hand-held detector, any data in the DDC digital controller can be extracted and modified on site, such as: sensor detection range, control program parameters, including input to output, etc.
4) Connect with the network controller through the serial interface on the DDC, and become the most basic monitoring unit of the central monitoring system.

5. Central Station Monitoring Function

Take Windows NT as the operating platform, adopt industrial standard application software, distributed control system, secondary network structure, and the graphical operation interface of the Chinese culture monitors the operating status of the entire system, and provides on-site pictures and process flow diagrams (such as air-conditioning control systems). Figure), real-time graphs, monitoring point tables, and drawing plane layout diagrams to display the operating conditions of the equipment in a vivid and intuitive way of dynamic graphics. Draw a floor plan or flowchart and embed dynamic data to display the status of each monitoring point in the diagram, and provide operating instructions for modifying parameters or issuing instructions.
It can provide a variety of ways to view the device status, such as through the floor plan or flowchart, through the drop-down menu or function keys for common function manipulation, and click the mouse to view the device status and related parameters in detail.

6. Control Function

The on-site device can be manually controlled by operating the graphics in the center, such as the ON/OFF control of the device; the operation mode can be set by selecting the operation, such as selecting the on-site manual mode or automatic operation mode; through the exchange mode The menu can easily modify the process parameters.
Strict management of the operating authority of the system to package the operating safety of the system. The identification and control of the operator’s identity by passing characters. According to different identities, operators can be divided into 5-10 security management levels from low to high. Advanced alarm function: When the system fails or the field equipment fails and the monitored parameters exceed the limit, an alarm signal is generated. The alarm signal always appears at the bottom of the display screen. It is an audible and visual alarm. The operator must confirm the alarm signal. Release, but all alarms will be recorded in the alarm summary table for the operator to view. The alarm is divided into 4 priority levels.

7. Comprehensive Management Function

For data that has research and analysis value and should be preserved for a long time, establish a historical document database. The popular general standard relational database software package and hard disk are used as the large-capacity storage to build the database, and form the display or print functions such as graphs.
Provide summary report: as a basis for system operation status monitoring, management level assessment, further optimization of operating parameters and as a basis for equipment management automation, such as the use of summary reports to record various energy consumption and its cumulative value every day, week, and month, Provide a basis for energy conservation; another example is a summary report of equipment running time and start and stop times (listed separately for each equipment) to provide a basis for equipment management and maintenance.
Graphical time program plan can be provided, the plan can be set according to the calendar, and the timetable for the operation of building equipment can be formulated. Can provide weekly, regional, monthly calendar and holiday planning arrangements.

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