CN106500274B - Energy saving system and method implemented on VAV system via wireless sensor network - Google Patents

Abstract

The invention discloses an energy-saving system and method implemented on a VAV system through a wireless sensor network, which improves the cross-regional temperature experience of personnel in the traditional VAV system, saves energy, and improves energy utilization. The technical scheme is as follows: the system includes: a mobile node for detecting the surrounding temperature in real time and sending information to the surrounding beacon nodes, the information including the mobile node's own identification number and the detected real-time temperature value; the beacon node for receiving surrounding beacon nodes. The information sent by the mobile node, and send the information to the central node, the information includes the beacon node's own identification number and the information of all mobile nodes received; the central node receives the information sent by all the beacon nodes, calculates each VAV The temperature set point and controlled temperature that the terminal should adopt, and send to the corresponding VAV terminal and control it.

Description

Energy saving system and method implemented on VAV system via wireless sensor network

technical field

The invention relates to an energy-saving upgrading technology for a VAV (Variable Air System) variable air volume system, in particular to an energy-saving system and method implemented on the VAV system through a wireless sensor network.

Background technique

The VAV system is an all-air air-conditioning system that can automatically adjust the air supply volume of the air-conditioning system according to the change of indoor load or the change of indoor required parameters, so that the indoor parameters can meet the requirements. The VAV system seeks to meet the requirements of the indoor air environment with less energy consumption. The system control principle is: the variable air volume controller and the room thermostat together form the indoor cascade control, the indoor temperature is used as the main control quantity, and the air flow is the auxiliary control quantity. According to the actual temperature detected by the room temperature sensor, the variable air volume controller compares the difference with the set temperature, so as to output the adjustment signal of the required air volume, adjust the air valve at the end of the variable air volume, and change the air supply volume to keep the indoor temperature at Predetermined area. At the same time, the air duct pressure sensor detects the pressure change in the air duct, adopts PI or PID adjustment, and controls the speed of the blower of the variable air volume air conditioner through the inverter to eliminate the influence of pressure fluctuations and maintain the air supply volume.

The common control methods of VAV air conditioning system include constant static pressure control, variable static pressure control and total air volume control. Among them, the constant static pressure control ensures that the static pressure of a certain point (or the average of several points) in the air duct of the system is constant, and the required indoor air volume is adjusted by the VAVBOX damper; the air supply volume of the system is determined by the static pressure in the air duct and the value set at this point. The difference value controls the work of the inverter to adjust the fan speed to determine. At the same time, the supply air temperature can be changed to meet indoor comfort requirements. The variable static pressure control ensures that the VAVBOX air valve is in the fully open position (85-100%) as much as possible. The air supply volume of the system is determined by the static pressure required in the air duct to control the frequency converter and adjust the fan speed. At the same time, the supply air temperature can be changed to meet indoor comfort requirements. The total air volume control adjusts the indoor temperature by changing the supply air volume, and keeps the difference between the supply air and the return air constant to meet the needs of the structure's exhaust air.

The traditional VAV system usually divides the building into fixed areas, and each area uses one or several VAV terminals to control the area temperature according to the area temperature set point. A fixed number of vents are connected to each VAV terminal to cover a certain area, and the vents are generally uncontrollable.

The VAV air conditioning system originated in the United States in the 1960s, was widely used in Europe, America and Japan in the 1970s, and entered mainland my country in the late 1990s. At present, the VAV market is showing a growing trend. Occupancy rate: The utilization rate of VAV system in high-rise buildings in the United States is over 90%, and the utilization rate of VAV system in famous buildings in Hong Kong in the 1990s is 70-80%. It has also been widely used in Japan. Therefore, VAV technology is very mature and has gradually become the mainstream method of air conditioning control in the world. Foreign high-end office buildings generally regard the VAV air-conditioning system as a conventional necessary system and refuse to use the FC+ fresh air system. "Let FC return to the hotel" is the best conclusion of this situation. The development trend of domestic high-end office buildings is bound to be the VAV system, because the VAV system has unparalleled advantages in technology, economy, flexibility, and low maintenance. It has huge advantages and is developing rapidly in the world. At present, it has accounted for 30% of the world's air-conditioning system, and it has become the inevitable development of air-conditioning. At present, the utilization rate of high-rise buildings abroad has reached 95%.

But the current traditional VAV system has the following disadvantages:

1. The control is not flexible enough, and it is easy to cause energy waste, especially in the case of no one or few people, the system cannot automatically shut down or adjust the set point. Some traditional systems use infrared technology to sense whether there are people, but usually cannot give the approximate number of people, and cannot do further system control and optimization.

2. When crossing the boundaries of different regions, due to different set points, the temperature across regions usually changes instantaneously, making the experience worse.

3. The traditional regional temperature set point is a relatively fixed value from BAS or local manual adjustment, and does not consider the different adaptability of different groups of people such as the elderly, children and young adults to the regional temperature.

SUMMARY OF THE INVENTION

A brief summary of one or more aspects is presented below to provide a basic understanding of the aspects. This summary is not an exhaustive overview of all contemplated aspects and is neither intended to identify key or critical elements of all aspects nor attempt to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

In order to solve the above technical problems, the present invention provides an energy-saving system and method implemented on a VAV system through a wireless sensor network, which improves the cross-regional temperature experience of personnel in the traditional VAV system, saves energy, and improves energy utilization.

The technical scheme of the present invention is as follows: the present invention discloses an energy-saving system implemented on a VAV system through a wireless sensor network, including:

The mobile node is used to detect the surrounding temperature in real time and send information to the surrounding beacon nodes, the information includes the mobile node's own identification number and the detected real-time temperature value;

The beacon node receives the information sent by the surrounding mobile nodes, and sends the information to the central node, the information includes the beacon node's own identification number and the information of all mobile nodes received;

The central node receives the information sent by all beacon nodes, calculates the temperature set point and controlled temperature that each VAV terminal should adopt, and sends it to the corresponding VAV terminal to control it.

According to an embodiment of the energy saving system implemented on the VAV system through the wireless sensor network of the present invention, the mobile node is embedded in the object that moves with people, and the beacon node is fixed at the air outlet of each VAV terminal.

According to an embodiment of the energy-saving system implemented on the VAV system through the wireless sensor network of the present invention, the control performed by the central node on the VAV terminal includes controlling the cooling or heating of the VAV terminal, and the output is sent to the VAV terminal through the ventilation port connected to the VAV terminal. The area covered by the vent is supplied with air, and it is considered that there is no one near the location of the beacon node that has not received the signal of the mobile node, and the corresponding VAV terminal is controlled to close or use the default parameters.

According to an embodiment of the energy saving system implemented on the VAV system through the wireless sensor network of the present invention, the central node provides the user with the function of setting the corresponding temperature set point for each mobile node through the user interface, and judges the user according to the system setting. Is the setting reasonable.

According to an embodiment of the energy-saving system implemented on the VAV system through the wireless sensor network of the present invention, the central node provides the system administrator with the function of creating a mobile node and assigning an identification number and a weight value through the system administrator interface, setting the mobile node's The function of the range of the temperature set point, the function of setting the system mode cooling or heating, and the detection and processing of possible setting conflicts between mobile nodes.

According to an embodiment of the energy saving system implemented on the VAV system through the wireless sensor network of the present invention, the central node includes:

The terminal positioning module uses all beacon nodes that receive a signal from a mobile node as the estimated value of the mobile node's positioning, uses a non-ranging-based centroid positioning algorithm to obtain the range of the mobile node and opens the VAV terminals within this range.

According to an embodiment of the energy-saving system implemented on the VAV system through the wireless sensor network of the present invention, the central node includes a terminal temperature setting module, wherein the terminal temperature setting module further includes:

Beacon node temperature and weight calculation unit, calculate the temperature, temperature setting value and weight of each beacon node: the temperature of the beacon node is the sum of the product of the temperature and the weight of each mobile node corresponding to it divided by the weight and, the temperature set point of the beacon node is the sum of the product of the temperature set point and the weight of each mobile node corresponding to it divided by the sum of the weights, and the weight of the beacon node is the value of each mobile node corresponding to it. The sum of the weights is divided by the number of mobile nodes;

The VAV terminal temperature and set point calculation unit calculates the controlled temperature and temperature set point of the VAV terminal: the controlled temperature of the VAV terminal is the sum of the product of the temperature and the weight of each beacon node corresponding to it divided by the weight And, the temperature set point of the VAV terminal is the sum of the product of the temperature set point and the weight of each beacon node corresponding to it divided by the sum of the weight.

According to an embodiment of the energy saving system implemented on the VAV system through the wireless sensor network of the present invention, in the process of calculating the temperature set point and the controlled temperature that each VAV terminal should adopt by the central node, the mobile node is allowed to participate in the corresponding The operation of multiple beacon nodes of the same VAV terminal allows the mobile node to participate in the operation of multiple beacon nodes of different VAV terminals.

The present invention also discloses a method for energy saving implemented on the VAV system through the wireless sensor network, comprising:

The mobile node detects the surrounding temperature in real time and sends information to the surrounding beacon nodes, the information includes the mobile node's own identification number and the detected real-time temperature value;

Receive the information sent by the surrounding mobile nodes through the beacon node, and send the information to the central node, the information includes the beacon node's own identification number and the received information of all mobile nodes;

The central node receives the information sent by all beacon nodes, calculates the temperature set point and controlled temperature that each VAV terminal should adopt, and sends it to the corresponding VAV terminal to control it.

According to an embodiment of the energy saving method implemented on the VAV system through the wireless sensor network of the present invention, the mobile node is embedded in the object that moves with people, and the beacon node is fixed at the air outlet of each VAV terminal.

According to an embodiment of the energy-saving method implemented on the VAV system through the wireless sensor network of the present invention, the control performed by the central node on the VAV terminal includes controlling the cooling or heating of the VAV terminal, and the output is output through a vent connected to the VAV terminal, Supply air to the area covered by the vent, consider that there is no one near the location of the beacon node that has not received the signal of the mobile node, and control the corresponding VAV terminal to close or use the default parameters.

According to an embodiment of the method for energy saving implemented on the VAV system through the wireless sensor network of the present invention, the method further comprises a user preset step:

The user sets the corresponding temperature set point for each mobile node on the central node through the user interface, and the central node judges whether the user's setting is reasonable according to the system setting.

According to an embodiment of the method for energy saving implemented on the VAV system through the wireless sensor network of the present invention, the method further includes a system administrator preset step:

The system administrator creates mobile nodes through the central node and assigns the identification number and weight value, sets the temperature set point range of the mobile node, sets the system mode cooling or heating function, and the central node detects the possible setting conflicts between the mobile nodes and process.

According to an embodiment of the energy-saving method implemented on the VAV system through the wireless sensor network of the present invention, the central node uses all the beacon nodes that receive the signals of a mobile node as the positioning estimation value of the mobile node, and uses The centroid location algorithm of the distance obtains the range of the mobile node and opens the VAV terminals within this range.

According to an embodiment of the energy-saving method implemented on the VAV system through the wireless sensor network of the present invention, the step of calculating the temperature set point and the controlled temperature that each VAV terminal should adopt by the central node includes:

First calculate the temperature, temperature setting value and weight of each beacon node: the temperature of the beacon node is the sum of the product of the temperature and the weight of each mobile node corresponding to it divided by the sum of the weights, the temperature of the beacon node is set The fixed point is the sum of the product of the temperature set point and the weight of each mobile node corresponding to it, divided by the sum of the weights, and the weight of the beacon node is the sum of the weights of each mobile node corresponding to it divided by the number of mobile nodes. ;

Secondly, the controlled temperature and temperature set point of the VAV terminal are calculated: the controlled temperature of the VAV terminal is the sum of the product of the temperature and the weight of each beacon node corresponding to it divided by the sum of the weight, the temperature set point of the VAV terminal is the sum of the product of the temperature set point and the weight of each beacon node corresponding to it divided by the sum of the weights.

According to an embodiment of the energy saving method implemented on the VAV system through the wireless sensor network of the present invention, in the process of the central node calculating the temperature set point and the controlled temperature that each VAV terminal should adopt, the mobile node is allowed to participate in the The operation of multiple beacon nodes corresponding to the same VAV terminal allows the mobile node to participate in the operation of multiple beacon nodes of different VAV terminals.

Compared with the prior art, the present invention has the following beneficial effects: the present invention improves the temperature experience of different groups of people by monitoring whether there are people in the area and adjusting different temperature set points in real time, and the wireless sensor network in the present invention is used for personnel positioning and temperature collection , and combined with the parameters set by the webpage or mobile application, it provides a new temperature set point and real-time temperature execution control for the VAV terminal. The invention transforms the traditional VAV system, and the regional temperature set point and the regional temperature value of the VAV terminal come from the central node of the wireless sensor network. Overall, the present invention has the following advantages:

1. By setting the high priority of the elderly, children and other groups, the temperature set point and control temperature value are more inclined to them;

2. With the movement of people, the beacon node that receives the signal changes accordingly, which is equivalent to the movement of the "area", which blurs the traditional concept of area, thereby improving the cross-area experience of the traditional system, and the temperature will not change instantaneously.

3. Save energy and improve energy utilization rate, especially suitable for public places with large space, many VAV terminals, and small and irregular personnel flow.

4. The changes to the traditional system are small, especially the air handler is relatively independent and does not affect each other. It is easier to integrate into the existing BAS or VAV system, and has no effect on the schedule and other functions of the original system (such as VAS). .

5. The improved simplified centroid positioning algorithm based on non-ranging is adopted, which has low implementation cost and is suitable for applications such as VAV that do not require high accuracy.

6. The transmission range and power of the mobile node are small, the radiation is low, and the battery can be used for battery life.

Description of drawings

FIG. 1 shows a schematic diagram of an embodiment of an energy saving system of the present invention implemented on a VAV system through a wireless sensor network.

FIG. 2 shows a schematic diagram of an embodiment of the energy saving system of the present invention implemented on a VAV system through a wireless sensor network.

FIG. 3 shows a schematic diagram of the data flow in the energy-saving system of the present invention.

FIG. 4 shows a flow chart of an embodiment of the energy saving method implemented on the VAV system through the wireless sensor network of the present invention.

Detailed ways

The above-described features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale and components with similar related characteristics or features may have the same or similar reference numbers.

Embodiments of energy saving systems implemented on VAV systems via wireless sensor networks

Figure 2 illustrates the principle of an embodiment of the energy saving system of the present invention implemented on a VAV system via a wireless sensor network. Referring to FIG. 2 , the energy-saving system in this embodiment includes: multiple mobile nodes 1a to 1n (shown as hollow ovals in FIG. 1 ), multiple beacon nodes 2a to 2m (shown as triangles in FIG. 1 ), and a central node 3 (shown as a solid oval in Figure 1).

Mobile nodes 1a to 1n are embedded in objects that move with people (such as employee cards, etc.), and beacon nodes 2a to 2m are fixed at the air outlet position of each VAV terminal (shown as a trapezoid in Figure 1). Generally, the air outlets are arranged in a Network-like, so the beacon nodes are also arranged in a uniform network in the spatial range. The mobile nodes 1a-1n detect the surrounding temperature in real time and send information to the surrounding beacon nodes, the information includes the mobile node's own identification number and the detected real-time temperature value.

The beacon nodes 2a-2m receive the information sent by the surrounding mobile nodes, and send the information to the central node 3, the information includes the beacon node's own identification number and the information of all the mobile nodes it has received.

The central node 3 receives the information sent by all the beacon nodes 2a-2m, calculates the temperature set point and controlled temperature that each VAV terminal should adopt, and sends it to the corresponding VAV terminal to control it. The control implemented by the central node 3 to the VAV terminal includes controlling the cooling or heating of the VAV terminal, outputting through the vent connected to the VAV terminal, supplying air to the area covered by the vent, and considering that the beacon node that has not received the signal of the mobile node If there is no one near the location, control the corresponding VAV terminal to close or use the default parameters.

During implementation, the central node 3 provides the user with the function of setting a corresponding temperature set point for each mobile node through the user interface 31, and judges whether the user's setting is reasonable according to the system setting.

At the same time, the central node 3 provides the system administrator with the function of creating mobile nodes and assigning identification numbers and weight values through the system administrator interface 32. For example, the elderly and children can be given a high weight, and the young and middle-aged can be given a low weight, and a mobile node can be set. The function of setting the range of the temperature set point, the function of setting the system mode cooling or heating function, and the detection and processing of possible setting conflicts between mobile nodes.

The central node 3 includes a terminal positioning module 33 and a terminal temperature setting module 34 .

In the terminal positioning module 33, the mobile node periodically sends a signal to the beacon node, and the beacon node that receives the signal periodically sends all relevant information to the central node, and the central node can know which beacon nodes have received a certain mobile node. The centroid of these beacon nodes can be used as the positioning estimation value of the mobile node. That is, the terminal positioning module 33 uses all beacon nodes that have received a signal of a mobile node as the positioning estimation value of the mobile node, uses the non-ranging-based centroid positioning algorithm to obtain the range of the mobile node, and opens the range of the mobile node. VAV terminal. The denser the layout of the beacon nodes, the higher the estimation accuracy. The present invention places the beacon nodes near the position of the air outlet. In the specific implementation, as long as the signal of the mobile node is received, the beacon node considers that it is within the transmission range of the mobile node and its coordinates will participate in the estimation of the mobile node's centroid positioning, and then the system will control the corresponding VAV terminal to open and work.

The terminal temperature setting module 34 includes a beacon node temperature and weight calculation unit 341 and a VAV terminal temperature and set point calculation unit 342 .

In the beacon node temperature and weight calculation unit 341, the temperature, temperature setting value and weight of each beacon node are calculated: the temperature of the beacon node (Diffuser Temp) is the product of the temperature and the weight of each mobile node corresponding to it The sum is divided by the sum of the weights. The temperature set point of the beacon node (Diffuser Temp Setpoint) is the sum of the product of the temperature set point and the weight of each mobile node corresponding to it divided by the sum of the weights. The weight (Diffuser Priority) is the sum of the weights of each mobile node corresponding to it divided by the number of mobile nodes.

In the VAV terminal temperature and set point calculation unit 342, the controlled temperature of the VAV terminal and the temperature set point are calculated: the controlled temperature of the VAV terminal is the product of the temperature (Diffuser Temp) of each beacon node corresponding to it and the weight The sum is divided by the sum of the weights, and the temperature set point of the VAV terminal is the sum of the products of the temperature set point (DiffuserTemp Setpoint) and the weight of each corresponding beacon node divided by the sum of the weights. In the process that the central node calculates the temperature set point and controlled temperature that each VAV terminal should adopt, the mobile node is allowed to participate in the calculation of multiple beacon nodes corresponding to the same VAV terminal, and the mobile node is allowed to participate in the operation of different VAV terminals. The operation of multiple beacon nodes is equivalent to doubling the weight of the mobile node for the VAV terminal operation, indicating that the VAV terminal has a high probability of being the only source of wind for the mobile node, and correspondingly indicates that the mobile node participates in the operation of a single beacon node. There is a high probability that the node also participates in the operation of other VAV terminals.

Figure 2 shows the installation positions of a mobile node (Mobile Node) 1, a beacon node (Diffuser Node) 2, and a central node (CentralNode) 3 in the VAV system. The data flow diagram of mobile node 1, beacon node 2, central node 3 and VAV terminal 4 in the energy-saving system is shown in Figure 3. Mobile node 1 (shown as a hollow ellipse in Figure 3) uses its own identification number (eg ID-m1, ID-m2, ID-m3 in the figure) and the detected real-time temperature values (such as Temp-m1, Temp-m2, Temp-m3 in the figure) are transmitted to the corresponding beacon node 2 (Figure 3 shown as a triangle), the beacon node 2 will receive the identification number of the mobile node (such as ID-m1, ID-m2 group and ID-m3 group in the figure) and real-time temperature value (such as Temp in the figure) -m1, a group of Temp-m2 and a group of Temp-m3), the identification number of the beacon node itself (such as ID-d1 and ID-d2 in the figure) is transmitted to the central node 3 (shown as a solid oval in Figure 3) ). The central node 3 sets the corresponding temperature set point and weight for each mobile node, the position of each beacon node and the corresponding VAV terminal, and the information transmitted from the beacon node, based on the user interface and the system administrator interface. The controlled temperature and temperature set point for the VAV terminal are calculated and communicated to the VAV terminal 4 to control it.

As the mobile node moves, the target position enters the transmission range, and the corresponding VAV terminal starts pre-cooling or heating. Ideally, the node can feel the set temperature when it moves to the target position. The transmit power and range of the mobile node need to consider a variety of factors, and carry out system design to achieve the optimal effect.

An embodiment of an energy saving method implemented on a VAV system via a wireless sensor network

FIG. 4 shows a flow chart of an embodiment of the energy saving method implemented on the VAV system through the wireless sensor network of the present invention. Referring to FIG. 4 , the following is a detailed description of the implementation steps of the energy saving method of this embodiment.

Step S1: Detect the ambient temperature in real time through the movable node and send information to the surrounding beacon nodes, the information includes the identification number of the movable node and the detected real-time temperature value.

Movable nodes are embedded in objects that move with people, and beacon nodes are fixed at the air outlet of each VAV terminal.

Step S2: Receive the information sent by the surrounding movable nodes through the beacon node, and send the information to the central node, where the information includes the beacon node's own identification number and the information of all the movable nodes received.

Step S3: Receive the information sent by all beacon nodes through the central node, calculate the temperature set point and controlled temperature that each VAV terminal should adopt, and send it to the corresponding VAV terminal to control it.

The control implemented by the central node to the VAV terminal includes controlling the cooling or heating of the VAV terminal, outputting through the vent connected to the VAV terminal, supplying air to the area covered by the vent, and considering that the beacon node that has not received the signal of the movable node If there is no one near the location, control the corresponding VAV terminal to close or use the default parameters.

In this step, it can be specifically refined into two steps of calculating the range of the VAV terminal and calculating the temperature set point and controlled temperature that each VAV terminal should adopt.

For the calculation of the terminal range, the central node takes the beacon node that has received a signal from a movable node as the positioning estimate value of the movable node, and uses the non-ranging-based centroid positioning algorithm to obtain the range of the movable node and open this VAV terminals within range.

For calculating the temperature set point and controlled temperature that should be used by each VAV terminal, first calculate the temperature, temperature set value and weight of each beacon node: the temperature of the beacon node is the temperature of each mobile node corresponding to it. The sum of the product of temperature and weight divided by the sum of weights, the temperature set point of the beacon node is the sum of the product of the temperature set point and the weight of each mobile node corresponding to it divided by the sum of weights, the weight of the beacon node is the sum of the weights of each mobile node corresponding to it divided by the number of mobile nodes;

Secondly, the controlled temperature and temperature set point of the VAV terminal are calculated: the controlled temperature of the VAV terminal is the sum of the product of the temperature and the weight of each beacon node corresponding to it divided by the sum of the weight, the temperature set point of the VAV terminal is the sum of the product of the temperature set point and the weight of each beacon node corresponding to it divided by the sum of the weights. In the process that the central node calculates the temperature set point and controlled temperature that each VAV terminal should adopt, the movable node is allowed to participate in the calculation of multiple beacon nodes corresponding to the same VAV terminal.

Before implementing the method, it also includes two steps of user presetting and system administrator presetting. For user presets, the user sets the corresponding temperature set point for each movable node on the central node through the user interface, and the central node judges whether the user's setting is reasonable according to the system settings. For the system administrator preset, the system administrator creates the movable node through the central node and assigns the identification number and weight value, sets the range of the temperature set point of the movable node, and sets the system mode cooling or heating function. Nodes detect possible settings conflicts between movable nodes and handle them.

Although the above-described methods are illustrated and described as a series of acts for simplicity of explanation, it should be understood and appreciated that these methods are not limited by the order of the acts, as some acts may occur in a different order in accordance with one or more embodiments and/or occur concurrently with other actions from or not shown and described herein but understood by those skilled in the art.

Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The various illustrative logic blocks, modules, and circuits described in connection with the embodiments disclosed herein may be implemented using general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other Programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein are implemented or performed. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integrated into the processor. The processor and storage medium may reside in the ASIC. The ASIC may reside in the user terminal. In the alternative, the processor and storage medium may reside in the user terminal as discrete components.

In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage medium can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage, or other magnetic storage devices, or can be used to carry or store instructions or data structures in the form of Any other medium that conforms to program code and that can be accessed by a computer. Any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave , then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc as used herein includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc, where disks are often reproduced magnetically data, and discs reproduce the data optically with a laser. Combinations of the above should also be included within the scope of computer-readable media.

The previous description of the present disclosure is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. an energy-saving system implemented on a VAV system by a wireless sensor network, characterized in that, comprising: The mobile node is used to detect the surrounding temperature in real time and send information to the surrounding beacon nodes, the information includes the mobile node's own identification number and the detected real-time temperature value; The beacon node receives the information sent by the surrounding mobile nodes, and sends the information to the central node, the information includes the beacon node's own identification number and the information of all mobile nodes received; The central node receives the information sent by all beacon nodes, calculates the temperature set point and controlled temperature that each VAV terminal should use, and sends it to the corresponding VAV terminal to control it; The control implemented by the central node on the VAV terminal includes controlling the cooling or heating of the VAV terminal, outputting through the vent connected to the VAV terminal, supplying air to the area covered by the vent, and considering that the beacon node that has not received the signal of the mobile node If there is no one near the location, control the corresponding VAV terminal to close or use the default parameters; The central node includes a terminal positioning module and a terminal temperature setting module, wherein: The terminal positioning module uses all beacon nodes that have received a signal of a mobile node as the positioning estimation value of the mobile node, adopts a non-ranging-based centroid positioning algorithm to obtain the range of the mobile node, and opens the VAV terminal within this range; The terminal temperature setting module further includes: Beacon node temperature and weight calculation unit, calculate the temperature, temperature setting value and weight of each beacon node: the temperature of the beacon node is the sum of the product of the temperature and the weight of each mobile node corresponding to it divided by the weight and, the temperature set point of the beacon node is the sum of the product of the temperature set point and the weight of each mobile node corresponding to it divided by the sum of the weights, and the weight of the beacon node is the value of each mobile node corresponding to it. The sum of the weights is divided by the number of mobile nodes; The VAV terminal temperature and set point calculation unit calculates the controlled temperature and temperature set point of the VAV terminal: the controlled temperature of the VAV terminal is the sum of the product of the temperature and the weight of each beacon node corresponding to it divided by the weight And, the temperature set point of the VAV terminal is the sum of the product of the temperature set point and the weight of each beacon node corresponding to it divided by the sum of the weight. 2. The energy-saving system implemented on a VAV system through a wireless sensor network according to claim 1, wherein the mobile node is embedded in an object that moves with people, and the beacon node is fixed at the air outlet position of each VAV terminal . 3. The energy-saving system implemented on a VAV system through a wireless sensor network according to claim 1, wherein the central node provides the user with the function of setting a corresponding temperature set point for each mobile node through a user interface, and Determine whether the user's settings are reasonable according to the system settings. 4. The energy-saving system implemented on the VAV system by the wireless sensor network according to claim 1, wherein the central node provides the system administrator with the function of creating a mobile node and assigning an identification number and a weight value through a system administrator interface , the function of setting the range of the temperature set point of the mobile node, the function of setting the system mode cooling or heating function, and the detection and processing of possible setting conflicts between the mobile nodes. 5. The energy-saving system implemented on a VAV system through a wireless sensor network according to claim 1, characterized in that, in the process that the central node calculates the temperature set point and the controlled temperature that each VAV terminal should adopt, allow The mobile node participates in the calculation of multiple beacon nodes corresponding to the same VAV terminal, allowing the mobile node to participate in the calculation of multiple beacon nodes of different VAV terminals. 6. A method of energy saving implemented on a VAV system via a wireless sensor network, comprising: The mobile node detects the surrounding temperature in real time and sends information to the surrounding beacon nodes, the information includes the mobile node's own identification number and the detected real-time temperature value; Receive the information sent by the surrounding mobile nodes through the beacon node, and send the information to the central node, the information includes the beacon node's own identification number and the received information of all mobile nodes; Receive the information sent by all beacon nodes through the central node, calculate the temperature set point and controlled temperature that each VAV terminal should adopt, and send it to the corresponding VAV terminal and control it, wherein the central node will receive a The beacon node of the signal of the mobile node is used as the positioning estimate value of the mobile node, and the range of the mobile node is obtained by using the centroid positioning algorithm based on non-ranging, and the VAV terminal within this range is opened; The control implemented by the central node on the VAV terminal includes controlling the cooling or heating of the VAV terminal, outputting through the vent connected to the VAV terminal, supplying air to the area covered by the vent, and considering that the beacon node that has not received the signal of the mobile node If there is no one near the location, control the corresponding VAV terminal to close or use the default parameters; The steps for the central node to calculate the temperature set point and controlled temperature that each VAV terminal should adopt include: First calculate the temperature, temperature setting value and weight of each beacon node: the temperature of the beacon node is the sum of the product of the temperature and the weight of each mobile node corresponding to it divided by the sum of the weights, the temperature of the beacon node is set The fixed point is the sum of the product of the temperature set point and the weight of each mobile node corresponding to it, divided by the sum of the weights, and the weight of the beacon node is the sum of the weights of each mobile node corresponding to it divided by the number of mobile nodes. ; Secondly, the controlled temperature and temperature set point of the VAV terminal are calculated: the controlled temperature of the VAV terminal is the sum of the product of the temperature and the weight of each beacon node corresponding to it divided by the sum of the weight, the temperature set point of the VAV terminal is the sum of the product of the temperature set point and the weight of each beacon node corresponding to it divided by the sum of the weights. 7. The energy-saving method implemented on a VAV system through a wireless sensor network according to claim 6, wherein the mobile node is embedded in an object that moves with people, and the beacon node is fixed at the air outlet of each VAV terminal Location. 8. The method for energy saving implemented on a VAV system through a wireless sensor network according to claim 6, wherein the method further comprises a user preset step: The user sets the corresponding temperature set point for each mobile node on the central node through the user interface, and the central node judges whether the user's setting is reasonable according to the system setting. 9. The method for energy saving implemented on a VAV system through a wireless sensor network according to claim 6, wherein the method further comprises a system administrator preset step: The system administrator creates mobile nodes through the central node and assigns the identification number and weight value, sets the temperature set point range of the mobile node, sets the system mode cooling or heating function, and the central node detects the possible setting conflicts between the mobile nodes and process. 10. The energy-saving method implemented on a VAV system through a wireless sensor network according to claim 6, wherein, in the process of calculating the temperature set point and the controlled temperature that each VAV terminal should adopt by the central node, The mobile node is allowed to participate in the calculation of multiple beacon nodes corresponding to the same VAV terminal, and the mobile node is allowed to participate in the calculation of multiple beacon nodes of different VAV terminals.