Heating and ventilation equipment temperature and humidity error calibration method based on wireless network

Abstract

A heating and ventilation equipment temperature and humidity error calibration method based on a wireless network comprises the following steps: creating a zigbee network, setting target temperature and humidity of zigbee heating and ventilation equipment, and constructing a corresponding external temperature source and heating and ventilation equipment temperature source association mapping table; whether an external temperature source mapping relation exists or not is judged, and an external temperature source online mode is started if the external temperature source mapping relation exists; if not, an external temperature source-local historical data error correction mode is started, the external temperature source online mode and the external temperature source-local historical data error correction mode analyze and process the actual temperature and humidity and target temperature and humidity errors of the heating and ventilation equipment respectively, and the generated errors are compensated; the current temperature and humidity value of the heating and ventilation equipment is consistent with the set target temperature and humidity value, errors are avoided, and monitoring is more accurate.

Description

Technical Field

[0001] The present invention relates to the field of wireless HVAC technology, and in particular to a method for calibrating temperature and humidity errors of HVAC equipment based on a wireless network. Background Art

[0002] Temperature and humidity monitoring systems are widely used in various laboratories, logistics warehousing, HVAC technology and other fields. However, due to various factors, the measurement structure of the temperature and humidity monitoring system generally has errors, especially in the HVAC field, such as temperature control valves, boiler controllers and other equipment. When the user sets the corresponding adjustment temperature, there will be a gap between the target temperature that the HVAC equipment can actually achieve and the actual expected temperature. Secondly, the temperature and humidity detection unit of such HVAC equipment is generally integrated into the equipment with a limited detection range and is affected by the temperature of the equipment itself, resulting in differences between the actual collected temperature and humidity and the set target temperature and humidity. Summary of the invention

[0003] The purpose of the present invention is to compensate for the error between the feedback data of the detection unit of the HVAC equipment itself and the actual set target temperature and humidity, so as to make the HVAC equipment monitoring more accurate.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for calibrating temperature and humidity errors of HVAC equipment based on a wireless network includes the following steps:

[0006] S1: Create a Zigbee network, set the target temperature and humidity of the Zigbee HVAC equipment, and broadcast the external temperature source discovery command to the entire Zigbee network. After receiving the temperature source discovery command, the Zigbee temperature and humidity monitoring device replies its own network information and temperature and humidity information data to the corresponding Zigbee HVAC equipment, and builds the corresponding external temperature source and HVAC equipment temperature source association mapping table;

[0007] S2: through the external temperature source and HVAC equipment temperature source association mapping table, determine whether there is at least one external temperature source that can be used, if so, turn on the external temperature source online mode, otherwise the Zigbee HVAC equipment uses its own temperature monitoring sensor as feedback for heating to the target temperature;

[0008] S3: When the external temperature source is online, the external temperature source replacement mode is turned on, otherwise the external temperature source-local historical data error correction mode is started.

[0009] Preferably, the ZigBee network comprises at least one ZigBee HVAC device, one ZigBee gateway and one ZigBee temperature and humidity monitoring device, wherein the ZigBee gateway is signal-connected to the ZigBee HVAC device and the ZigBee temperature and humidity monitoring device respectively.

[0010] Preferably, the specific steps of constructing the corresponding external temperature source and HVAC equipment temperature source association mapping table are:

[0011] S101: The ZigBee HVAC device starts the external temperature and humidity source search mode, and broadcasts the entire ZigBee network so that the ZigBee temperature and humidity monitoring device receives the corresponding search request, and then replies to the corresponding search request with its own temperature and humidity information;

[0012] S102: Unicast the search request to the discovered ZigBee HVAC equipment through the ZigBee network, store the reply of the ZigBee temperature and humidity monitoring equipment, and then wait for the discovery to complete before building a corresponding external temperature source and HVAC equipment temperature source association mapping table.

[0013] Preferably, the sequence of the HVAC equipment temperature source and external temperature source association mapping table is composed of:

[0014]

[0015] Preferably, the step of determining whether the external temperature source can be used is: checking that the difference between the last temperature data time of the device and the current time in the HVAC equipment temperature source and external temperature source device mapping table does not exceed 10 minutes.

[0016] Preferably, the specific steps of the external temperature source replacement mode are:

[0017] S201: The HVAC equipment adjusts the target temperature. At the same time, the ZigBee temperature and humidity monitoring equipment is enabled to accelerate the time interval of temperature collection through the ZigBee gateway, and the temperature is fed back to the ZigBee HVAC equipment through the ZigBee gateway.

[0018] S202: heating the ZigBee HVAC equipment, and then obtaining temperature data corresponding to the non-offline temperature source from the ZigBee HVAC equipment temperature source and external temperature source equipment mapping table;

[0019] S2023: When there are multiple temperature sources, take the average of the valid temperature sources to form external temperature source data, and then compare the external temperature source data with the target temperature set by the user. If the conditions are met, stop heating; if not, continue heating until the conditions are met.

[0020] Preferably, the specific steps of the external temperature source-local historical data error correction mode are:

[0021] S301: Adjust the target temperature of the Zigbee HVAC device, then traverse the device local and external temperature source device mapping relationship table without an online external temperature source, heat the Zigbee HVAC device, collect the temperature and humidity data of the Zigbee HVAC device itself, and compare the current device collected temperature and humidity values ​​with the data within plus or minus 10% of the current collected temperature and humidity values ​​from the external temperature source and HVAC device temperature source association mapping table to obtain records;

[0022] S302: If there are corresponding records, perform mean processing on the data within 10% error; if there are no corresponding records, perform mean processing on all stored data, and then perform average difference processing on the mean of the corresponding records and the mean of the data without corresponding records;

[0023] S303: The temperature and humidity values ​​of the ZigBee HVAC equipment itself are collected and added to the average difference to form the current temperature and humidity values ​​of the equipment;

[0024] S304: Compare the current temperature and humidity values ​​of the ZigBee HVAC device with the target heating temperature of the device set by the user. If they meet the requirements, stop the heating device. If not, continue to step S301 to add the ZigBee HVAC device until they meet the requirements.

[0025] Preferably, the average difference calculation formula is: (record error value 1+record error value 2+...+record error value x) / total number of records.

[0026] Preferably, the device target temperature set by the user is mainly set through an APP or wirelessly.

[0027] Compared with the prior art, the advantages and positive effects of the present invention are:

[0028] The present invention is based on a constructed ZigBee network system, which acquires data to form an external temperature source and a HVAC equipment temperature source association mapping table, and determines whether there is an external temperature source mapping relationship. If there is a mapping relationship, the external temperature source online mode is started; if not, the external temperature source-local historical data error correction mode is started, wherein the external temperature source online mode and the external temperature source-local historical data error correction mode respectively perform error analysis on the actual temperature and humidity of the HVAC equipment and the target temperature and humidity, and compensate for the generated errors, so that the current temperature and humidity values ​​of the HVAC equipment are consistent with the set target temperature and humidity values, thereby avoiding the generation of errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the workflow of the present invention;

[0030] Figure 2 This is a schematic diagram of the Zigbee network system;

[0031] Figure 3 It is a detailed flow chart of S1 of the present invention;

[0032] Figure 4 It is a detailed flow chart of S2 of the present invention;

[0033] Figure 5 It is a detailed flow chart of S3 of the present invention; DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Example 1: Figure 1 As shown, a method for calibrating the temperature and humidity errors of HVAC equipment based on a wireless network includes the following steps:

[0036] S1: Create a Zigbee network and broadcast an external temperature source discovery command to the entire Zigbee network. After receiving the temperature source discovery command, the Zigbee temperature and humidity monitoring device replies its own network information and temperature and humidity information data to the corresponding Zigbee HVAC device, and builds a corresponding external temperature source and HVAC device temperature source association mapping table;

[0037] S2: through the external temperature source and HVAC equipment temperature source association mapping table, determine whether there is at least one external temperature source that can be used, if so, turn on the external temperature source online mode, otherwise the Zigbee HVAC equipment uses its own temperature monitoring sensor as feedback for heating to the target temperature;

[0038] S3: When the external temperature source is online, the external temperature source replacement mode is turned on, otherwise the external temperature source-local historical data error correction mode is started.

[0039] When the HVAC equipment and the temperature and humidity monitoring equipment (external temperature source) are in the same local area network, the local area network mode is triggered to build a temperature source association mapping relationship table between the external temperature source and the HVAC equipment.

[0040] like Figure 2As shown, the zigbee network composition includes at least one ZigBee HVAC device, a ZigBee gateway and a ZigBee temperature and humidity monitoring device, wherein the ZigBee gateway is respectively connected to the ZigBee HVAC device and the ZigBee temperature and humidity monitoring device by signal, and the ZigBee HVAC device mainly refers to a temperature rise device that can be controlled wirelessly or received. The Zigbee gateway is the central device of the Zigbee network, responsible for managing the entire Zigbee intelligent network (addition / deletion of devices), receiving information reported by the device, maintaining the topology of the current message transmission path, and assuming the role of the path calculation center in the device self-addition. The Zigbee temperature and humidity monitoring device has the ability to collect temperature and humidity and a Zigbee wireless transmission device, which can collect temperature and humidity data corresponding to the current environment in real time.

[0041] like Figure 3 As shown, the specific steps of constructing the corresponding external temperature source and HVAC equipment temperature source association mapping table are:

[0042] S101: The ZigBee HVAC device starts the external temperature and humidity source search mode, and broadcasts the entire ZigBee network so that the ZigBee temperature and humidity monitoring device receives the corresponding search request, and then replies to the corresponding search request with its own temperature and humidity information;

[0043] S102: Unicast the search request to the discovered ZigBee HVAC equipment through the ZigBee network, store the reply of the ZigBee temperature and humidity monitoring equipment, and then wait for the discovery to complete before building a corresponding external temperature source and HVAC equipment temperature source association mapping table.

[0044] Network access and principle:

[0045] After the HVAC equipment joins the network, it broadcasts an external temperature source discovery command to the entire ZigBee network. After receiving the temperature source discovery command, the temperature and humidity monitoring device replies with its own network information and temperature and humidity information data to the corresponding initiating HVAC equipment. After waiting for the temperature source discovery to be completed, the HVAC equipment counts the reply information received from the temperature and humidity monitoring device regarding the temperature source discovery, and builds the corresponding external temperature source device mapping relationship based on the reply information.

[0046] The sequence of the HVAC equipment temperature source and external temperature source association mapping table is composed of:

[0047]

[0048] The steps to determine whether the external temperature source can be used are: check that the difference between the last temperature data time of the device and the current time in the HVAC equipment temperature source and external temperature source device mapping table does not exceed 10 minutes.

[0049] like Figure 4 As shown, the specific steps of the external temperature source replacement mode are:

[0050] S201: The HVAC equipment adjusts the target temperature. At the same time, the ZigBee temperature and humidity monitoring equipment is enabled to accelerate the time interval of temperature collection through the ZigBee gateway, and the temperature is fed back to the ZigBee HVAC equipment through the ZigBee gateway.

[0051] S202: heating the ZigBee HVAC equipment, and then obtaining temperature data corresponding to the non-offline temperature source from the ZigBee HVAC equipment temperature source and external temperature source equipment mapping table;

[0052] S2023: When there are multiple temperature sources, take the average of the valid temperature sources to form external temperature source data, and then compare the external temperature source data with the target temperature set by the user. If the conditions are met, stop heating; if not, continue heating until the conditions are met.

[0053] Execution process:

[0054] When the ambient temperature is low, the user adjusts the heating through the HVAC equipment locally (wireless control) to make the surrounding environment reach a comfortable temperature. At this time, the HVAC equipment queries the mapping relationship table formed by the corresponding external temperature source obtained in the LAN temperature source discovery mode and the HVAC equipment locally to determine whether there is at least one external temperature source that can be used, and turns on the use of the external temperature source.

[0055] Strategy for determining whether an external temperature source can be used: Check that the difference between the last temperature data time of the device and the current time in the mapping relationship table of the local and external temperature source devices of the HVAC equipment is no more than 10 minutes.

[0056] When the external temperature source is online: turn on the external temperature source replacement mode

[0057] When the external temperature source mode is used, each target temperature comparison {external temperature source temperature data, device local temperature data} will be recorded to form a local-external temperature mapping table.

[0058] like Figure 5 As shown, when the external temperature source cannot be used normally: turn on the external temperature source-local historical data error correction mode. The specific steps of the external temperature source-local historical data error correction mode are:

[0059] S301: Adjust the target temperature of the Zigbee HVAC device, then traverse the device local and external temperature source device mapping relationship table without an online external temperature source, heat the Zigbee HVAC device, collect the temperature and humidity data of the Zigbee HVAC device itself, and compare the current device collected temperature and humidity values ​​with the data within plus or minus 10% of the current collected temperature and humidity values ​​from the external temperature source and HVAC device temperature source association mapping table to obtain records;

[0060] S302: If there are corresponding records, perform mean processing on the data within 10% error; if there are no corresponding records, perform mean processing on all stored data, and then perform average difference processing on the mean of the corresponding records and the mean of the data without corresponding records;

[0061] S303: The temperature and humidity values ​​of the ZigBee HVAC equipment itself are collected and added to the average difference to form the current temperature and humidity values ​​of the equipment;

[0062] S304: Compare the current temperature and humidity values ​​of the ZigBee HVAC device with the target heating temperature of the device set by the user. If they meet the requirements, stop the heating device. If not, continue to step S301 to add the ZigBee HVAC device until they meet the requirements.

[0063] The average difference calculation formula is: (record error value 1+record error value 2+...+record error value x) / total number of records.

[0064] The device target temperature set by the user is mainly set through APP or wirelessly.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for calibrating temperature and humidity errors of HVAC equipment based on a wireless network, characterized in that: The steps include: S1: Create a Zigbee network, set the target temperature and humidity of the Zigbee HVAC equipment, and broadcast the external temperature source discovery command to the entire Zigbee network. After receiving the temperature source discovery command, the Zigbee temperature and humidity monitoring device replies its own network information and temperature and humidity information data to the corresponding Zigbee HVAC equipment, and builds the corresponding external temperature source and HVAC equipment temperature source association mapping table; S2: through the external temperature source and HVAC equipment temperature source association mapping table, determine whether there is at least one external temperature source that can be used, if so, turn on the external temperature source online mode, otherwise the Zigbee HVAC equipment uses its own temperature monitoring sensor as feedback for heating to the target temperature; S3: When the external temperature source is online, the external temperature source replacement mode is turned on, otherwise the external temperature source-local historical data error correction mode is started.

2. According to a wireless network-based HVAC equipment temperature and humidity error calibration method according to claim 1, it is characterized in that: The ZigBee network comprises at least one ZigBee HVAC device, one ZigBee gateway and one ZigBee temperature and humidity monitoring device, wherein the ZigBee gateway is signal-connected to the ZigBee HVAC device and the ZigBee temperature and humidity monitoring device respectively.

3. According to a wireless network-based HVAC equipment temperature and humidity error calibration method according to claim 1, it is characterized in that: The steps for constructing the corresponding external temperature source and HVAC equipment temperature source association mapping table are as follows: S101: The ZigBee HVAC device starts the external temperature and humidity source search mode, and broadcasts the entire ZigBee network so that the ZigBee temperature and humidity monitoring device receives the corresponding search request, and then replies to the corresponding search request with its own temperature and humidity information; S102: Unicast the search request to the discovered ZigBee HVAC equipment through the ZigBee network, store the reply of the ZigBee temperature and humidity monitoring equipment, and then wait for the discovery to complete before building a corresponding external temperature source and HVAC equipment temperature source association mapping table.

4. According to a wireless network-based HVAC equipment temperature and humidity error calibration method according to claim 3, it is characterized in that: The sequence of the HVAC equipment temperature source and external temperature source association mapping table is composed of:

5. The method for calibrating temperature and humidity errors of HVAC equipment based on a wireless network according to claim 1, characterized in that: The steps to determine whether the external temperature source can be used are: check that the difference between the last temperature data time of the device and the current time in the HVAC equipment temperature source and external temperature source device mapping table does not exceed 10 minutes.

6. The method for calibrating temperature and humidity errors of HVAC equipment based on a wireless network according to claim 1, characterized in that: The steps of external temperature source replacement mode are: S201: The HVAC equipment adjusts the target temperature. At the same time, the ZigBee temperature and humidity monitoring equipment is enabled to accelerate the time interval of temperature collection through the ZigBee gateway, and the temperature is fed back to the ZigBee HVAC equipment through the ZigBee gateway. S202: heating the ZigBee HVAC equipment, and then obtaining temperature data corresponding to the non-offline temperature source from the ZigBee HVAC equipment temperature source and external temperature source equipment mapping table; S2023: When there are multiple temperature sources, take the average of the valid temperature sources to form external temperature source data, and then compare the external temperature source data with the target temperature set by the user. If the conditions are met, stop heating; if not, continue heating until the conditions are met.

7. The method for calibrating temperature and humidity errors of HVAC equipment based on a wireless network according to claim 1, characterized in that: The steps of the external temperature source-local historical data error correction mode are: S301: Adjust the target temperature of the Zigbee HVAC device, then traverse the device local and external temperature source device mapping relationship table without an online external temperature source, heat the Zigbee HVAC device, collect the temperature and humidity data of the Zigbee HVAC device itself, and compare the current device collected temperature and humidity values ​​with the data within plus or minus 10% of the current collected temperature and humidity values ​​from the external temperature source and HVAC device temperature source association mapping table to obtain records; S302: If there are corresponding records, perform mean processing on the data within 10% error; if there are no corresponding records, perform mean processing on all stored data, and then perform average difference processing on the mean of the corresponding records and the mean of the data without corresponding records; S303: The temperature and humidity values ​​of the ZigBee HVAC equipment itself are collected and added to the average difference to form the current temperature and humidity values ​​of the equipment; S304: Compare the current temperature and humidity values ​​of the ZigBee HVAC device with the target heating temperature of the device set by the user. If they meet the requirements, stop the heating device. If not, continue to step S301 to add the ZigBee HVAC device until they meet the requirements.

8. The method for calibrating temperature and humidity errors of HVAC equipment based on a wireless network according to claim 7, characterized in that: The average difference calculation formula is: (Record error value 1 + record error value 2 + ... + record error value x) / total number of records.

9. The method for calibrating temperature and humidity errors of HVAC equipment based on a wireless network according to claim 1, characterized in that: The device target temperature set by the user is mainly set through APP or wirelessly.

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