““Online intelligent monitoring and management” is a new management mode that automatically collects data through sensing equipment, reflects the operating status of equipment truly and dynamically, and realizes “data flow” triggering “workflow”, which can predict equipment failures in advance and accurately locate faults. , Diagnose the cause of the failure, eliminate misjudgment and misjudgment, and minimize the maintenance workload.
“Online intelligent monitoring and management” is a new management mode that automatically collects data through sensing equipment, reflects the operating status of equipment truly and dynamically, and realizes “data flow” triggering “workflow”, which can predict equipment failures in advance and accurately locate faults. , Diagnose the cause of the failure, eliminate misjudgment and misjudgment, and minimize the maintenance workload.
The building equipment monitoring system uses automatic instrumentation, computer process control and network communication technology to automatically detect, monitor, optimize control and management of the environmental parameters inside the building and the operating conditions of the mechanical and electrical equipment in the building, so as to provide a good environment for the building. , save building energy consumption and improve staff efficiency, reduce operating personnel and costs, and achieve scientific and automated management.
According to the production site equipment monitoring system objects can be generally divided into the following subsystems:
(1) The heating, ventilation and air conditioning (HVAC) system includes air conditioning system, refrigeration system, air supply and exhaust system, heat exchange system, etc.
(2) The water supply and drainage system includes domestic hot water, reclaimed water station, domestic pool, water tank, collection pool, sewage pool and various pumps.
(3) Power distribution and lighting systems include power supply and distribution systems, power transformers, diesel generator sets, batteries, lighting systems, etc. System composition The building equipment monitoring system generally consists of four main parts: monitoring host, on-site controller, on-site instrument and communication network.
The monitoring host is the core of the equipment monitoring system. It is composed of the host, peripherals and software. Its main functions are: automatically monitor the operating status of each equipment in the system and the operating parameters of the system, so that it can work in a rational state, and monitor the equipment. Timely alarm and automatic recording of fault and abnormal parameters, automatic recording, storage and query of historical operation data, etc. The core technology of communication network is field bus.
Fieldbus Fieldbus is a digital, bidirectional transmission, multi-branch communication network connecting intelligent field devices (including sensors, controllers, intelligent valves, microprocessors, instruments, etc.) and automation systems. It makes the products of different manufacturers interoperate. The current open standards mainly include: LonWorks standard and BACnet standard.
The on-site controller is a miniaturized special computer control device installed near the on-site monitoring object. It collects and converts on-site instrument signals, accepts commands from the monitoring host or works independently, and outputs control signals to on-site actuators. Local instruments are divided into two categories: monitoring instruments and executive instruments.
Among them, the detection instruments include: temperature, humidity, pressure, differential pressure, flow rate, water level, carbon monoxide, carbon dioxide, illuminance, electricity and other measuring instruments, which can stably, accurately and reliably convert the detected parameters into electrical power acceptable to the on-site controller. Signals (digital and analog); executive instruments include: control valve instruments (such as electric control valves) that can continuously adjust the amount to be adjusted, and shut-off valve instruments that control the amount to be turned on and off (such as electric butterfly valve, solenoid valve, electric damper actuator, etc.), they accept the signal of the on-site controller, and adjust the on-site parameters stably, accurately and reliably.