CN110986297A - Laboratory air conditioner energy-saving control method and system based on UWB positioning - Google Patents

Laboratory air conditioner energy-saving control method and system based on UWB positioning Download PDF

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Publication number
CN110986297A
CN110986297A CN201911319626.8A CN201911319626A CN110986297A CN 110986297 A CN110986297 A CN 110986297A CN 201911319626 A CN201911319626 A CN 201911319626A CN 110986297 A CN110986297 A CN 110986297A
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laboratory
uwb
tag
current
base station
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Chinese (zh)
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周小莉
杨天笑
李冰霄
滕斐
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Suzhou Tenor Laboratory System Engineering Co Ltd
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Suzhou Tenor Laboratory System Engineering Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56—Remote control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/10—Occupancy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/10—Occupancy
    • F24F2120/12—Position of occupants

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to a laboratory air conditioner energy-saving control method and system based on UWB positioning, wherein the method comprises the following steps: acquiring ranging information between laboratory personnel and the UWB base station through communication between the UWB base station and the UWB tag; calculating the current positioning information of the laboratory personnel according to the ranging information; acquiring the current number of people in the laboratory according to the current positioning information; controlling the current fresh air supply volume of the air conditioner according to the current number of people; the system comprises: the UWB ranging module is used for acquiring ranging information between the laboratory staff and the UWB base station through communication between the UWB base station and the UWB tag; the positioning calculation module is used for calculating the current positioning information of the laboratory personnel according to the ranging information; the current number obtaining module is used for obtaining the current number of the laboratory according to the current positioning information of the laboratory personnel; and the air supply amount control module is used for controlling the current fresh air supply amount of the air conditioner according to the current number of people in the laboratory. The invention has the effect of saving the energy consumption of the air conditioner.

Description

Laboratory air conditioner energy-saving control method and system based on UWB positioning
Technical Field
The invention relates to the technical field of laboratory energy conservation, in particular to a laboratory air conditioner energy-saving control method and system based on UWB positioning.
Background
A perfect laboratory air conditioning system, except satisfying the control to environment humiture, still need provide sufficient outdoor fresh air (new trend) for the environment to guarantee the laboratory air quality of preferred. In summer, the enthalpy and temperature of outdoor air are higher than those of indoor air, so that the air conditioning system has to consume cold energy for processing fresh air; in winter, the outdoor temperature is lower than the indoor temperature, the moisture content is also low, and the energy of the air conditioning system is consumed for heating and humidifying fresh air. According to data, the proportion of fresh air load in the air conditioning system to the total load is large and can reach more than 30%, and therefore, the air conditioner consumes much energy for processing fresh air.
At present, the air supply volume of an air conditioner fresh air system is generally set when the air conditioner fresh air system leaves a factory so as to ensure the air quality adaptive to a certain space and number of people, and the air conditioner fresh air system cannot be changed in the using process. Therefore, when the number of people in the laboratory is small, the fresh air output volume of the air conditioner is larger than that required by the number of people at present, the fresh air load is relatively high, and unnecessary energy consumption is generated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a laboratory air conditioner energy-saving control method based on UWB positioning, which has the effect of saving the energy consumption of an air conditioner.
The invention also aims to provide a laboratory air conditioner energy-saving control system based on UWB positioning, which has the effect of saving the energy consumption of an air conditioner.
The above object of the present invention is achieved by the following technical solutions:
a laboratory air conditioner energy-saving control method based on UWB positioning comprises the following steps: acquiring ranging information between laboratory personnel and a UWB base station through communication between the UWB base station and a UWB tag; calculating the current positioning information of the laboratory personnel according to the ranging information; acquiring the current number of the laboratory according to the current positioning information of the laboratory personnel; and controlling the current fresh air supply volume of the air conditioner according to the current number of people in the laboratory.
Through adopting above-mentioned technical scheme, utilize UWB positioning technology to acquire the UWB label's that laboratory staff carried locating information, and then acquire laboratory staff's locating information, recycle locating information and obtain the number in the laboratory, adjust the size of new trend air supply volume according to the number, when the number is less in the discovery laboratory, can reduce new trend air supply volume, and then reduce new trend load, reduce the air conditioner energy consumption, realize laboratory air conditioner energy-conserving effect.
The present invention in a preferred example may be further configured to: the acquiring of ranging information between a laboratory worker and the UWB base station through communication between the UWB base station and the UWB tag includes: at least three UWB base stations arranged in a laboratory respectively broadcast request signals outwards; the UWB tag receives the request signal and returns a response signal carrying a tag ID; and for any UWB base station, the UWB base station calculates and generates the ranging information according to the received response signal, and the ranging information comprises the tag ID carried by the response information.
By adopting the technical scheme, only the UWB tags in the effective communication range of the UWB base station can communicate with the UWB base station, and each UWB base station can receive the response signals returned by all the UWB tags in the effective communication range of the UWB base station and respectively calculate each response signal to obtain the distance information between the UWB base station and all the UWB tags; the tag ID is used for uniquely identifying the UWB tag, so that the UWB tag can be conveniently identified, and then laboratory personnel can be identified.
The present invention in a preferred example may be further configured to: the calculating the current positioning information of the laboratory staff according to the ranging information comprises: for any tag ID, acquiring all ranging information corresponding to the tag ID; and when the number of all the ranging information corresponding to the tag ID is not less than 3, calculating according to the ranging information corresponding to the tag ID to obtain the current positioning information of the laboratory staff.
By adopting the technical scheme, for the same UWB tag, calculation can be carried out according to the ranging information of the three UWB base stations and the UWB tag, and the UWB tag can be accurately positioned.
The present invention in a preferred example may be further configured to: the obtaining of the current number of the laboratory according to the current positioning information of the laboratory staff comprises: judging whether the UWB tag is in the laboratory or not according to the current positioning information of the laboratory staff, and if so, recording the current positioning information of the laboratory staff; and summing the number of all recorded current positioning information to obtain the current number of the laboratory.
By adopting the technical scheme, the number of people in the current laboratory can be accurately judged.
The present invention in a preferred example may be further configured to: the new trend air supply volume according to laboratory current number control air conditioner includes: calculating to obtain the minimum fresh air volume according to the current number of the laboratory, the minimum fresh air volume required by a single person, the minimum fresh air volume required by unit area and the laboratory area; and adjusting the current fresh air supply quantity according to the minimum fresh air supply quantity.
By adopting the technical scheme, the factors influencing the fresh air supply volume are fully considered, the minimum air volume which enables the air quality in the laboratory to reach the excellent quality is obtained, the fresh air supply volume is adjusted, and the energy consumption of the air conditioner can be reduced.
The second aim of the invention is realized by the following technical scheme:
a laboratory air conditioner energy-saving control system based on UWB location includes: the UWB ranging module is used for acquiring ranging information between laboratory personnel and the UWB base station through communication between the UWB base station and the UWB tag; the positioning calculation module is connected with the UWB ranging module and used for calculating the current positioning information of the laboratory personnel according to the ranging information; the current number obtaining module is connected with the positioning calculating module and used for obtaining the current number of the laboratory according to the current positioning information of the laboratory personnel; and the air supply amount control module is connected with the current number acquisition module and used for controlling the current fresh air supply amount of the air conditioner according to the current number of the laboratory.
Through adopting above-mentioned technical scheme, utilize UWB positioning technology to acquire the UWB label's that laboratory staff carried locating information, and then acquire laboratory staff's locating information, recycle locating information and obtain the number in the laboratory, adjust the size of new trend air supply volume according to the number, when the number is less in the discovery laboratory, can reduce new trend air supply volume, and then reduce new trend load, reduce the air conditioner energy consumption, realize laboratory air conditioner energy-conserving effect.
The present invention in a preferred example may be further configured to: the UWB ranging module includes: the UWB base stations are arranged in the laboratory and used for broadcasting request signals outwards respectively; the UWB tag is used for receiving the request signal and returning a response signal carrying a tag ID; the UWB base station is further used for calculating and generating the ranging information according to the received response signal, and the ranging information comprises the tag ID carried by the response information.
By adopting the technical scheme, only the UWB tags in the effective communication range of the UWB base station can communicate with the UWB base station, and each UWB base station can receive the response signals returned by all the UWB tags in the effective communication range of the UWB base station and respectively calculate each response signal to obtain the distance information between the UWB base station and all the UWB tags; the tag ID is used for uniquely identifying the UWB tag, so that the UWB tag can be conveniently identified, and then laboratory personnel can be identified.
The present invention in a preferred example may be further configured to: the positioning calculation module is specifically configured to acquire all ranging information corresponding to any tag ID for the tag ID, and when the number of all ranging information corresponding to the tag ID is not less than 3, perform calculation according to the ranging information corresponding to the tag ID to obtain the current positioning information of the laboratory staff.
By adopting the technical scheme, for the same UWB tag, calculation can be carried out according to the ranging information of the three UWB base stations and the UWB tag, and the UWB tag can be accurately positioned.
The present invention in a preferred example may be further configured to: the current number of people obtains the module and includes: the recording module is used for judging whether the UWB tag is in the laboratory or not according to the current positioning information of the laboratory staff, and recording the current positioning information of the laboratory staff if the UWB tag is in the laboratory; and the summation module is connected with the recording module and is used for summing and calculating the number of all recorded current positioning information to obtain the current number of the laboratory.
By adopting the technical scheme, the number of people in the current laboratory can be accurately judged.
The present invention in a preferred example may be further configured to: the air supply amount control module includes: the air supply quantity calculation module is used for calculating to obtain the minimum fresh air supply quantity according to the current number of people in the laboratory, the minimum fresh air quantity required by a single person, the minimum fresh air quantity required by unit area and the laboratory area; and the air supply quantity adjusting module is connected with the air supply quantity calculating module and is used for adjusting the current fresh air supply quantity according to the minimum fresh air supply quantity.
By adopting the technical scheme, the factors influencing the fresh air supply volume are fully considered, the minimum air volume which enables the air quality in the laboratory to reach the excellent quality is obtained, the fresh air supply volume is adjusted, and the energy consumption of the air conditioner can be reduced.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the method comprises the steps that positioning information of a UWB tag carried by a laboratory worker is obtained by means of a UWB positioning technology, further the positioning information of the laboratory worker is obtained, the number of the laboratory worker is obtained by means of the positioning information, the fresh air supply quantity is adjusted according to the number of the worker, when the number of the worker in the laboratory is found to be small, the fresh air supply quantity can be reduced, further the fresh air load is reduced, the energy consumption of an air conditioner is reduced, and the energy-saving effect of the air conditioner in the laboratory is achieved;
2. for the same UWB tag, calculation can be carried out according to the ranging information of the three UWB base stations and the UWB tag, and the UWB tag can be accurately positioned;
3. factors influencing the fresh air supply quantity are fully considered, the minimum air quantity which enables the air quality in the laboratory to be excellent is obtained, then the fresh air supply quantity is adjusted, and the energy consumption of the air conditioner can be reduced.
Drawings
Fig. 1 is a flowchart of a method according to a first embodiment of the present invention.
FIG. 2 is a flowchart of a method according to a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a third embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1, a laboratory air conditioner energy-saving control method based on UWB positioning disclosed in the embodiment of the present invention mainly includes the following steps (step S101 to step S104):
step S101, obtaining distance measurement information between a laboratory worker and a UWB base station through communication between the UWB base station and the UWB tag;
in the present embodiment, at least three UWB base stations are provided in a laboratory (e.g., on a wall, an experimental equipment enclosure, etc.); every laboratory worker needs to carry a UWB tag with him. Since the short-distance transmission distance of the UWB technique is approximately ten or more meters, the number of UWB base stations can be set according to the area of a laboratory. For example, if the maximum distance in a laboratory is 10 meters, only three UWB base stations may be set, and if the area in the laboratory is large and the maximum distance exceeds 10 meters, more than four UWB base stations are required, so that the UWB tag at any position in the laboratory can establish effective communication with the UWB base stations, thereby realizing ranging.
Taking a UWB base station and a UWB tag as an example, the UWB base station continuously broadcasts a request pulse signal to the outside, and when the UWB tag is located within an effective communication range (typically, tens of meters) of the UWB base station, the request pulse signal is received, and then a response pulse signal is returned, and the UWB base station receives the response signal. By time-of-flight ranging (ToF) by measuring the time from the start to the return of a pulse signal, multiplied by the propagation speedDegree (the propagation speed of the pulse signal in the air is 3 x 10)5km/s) to obtain the distance from the UWB tag to the UWB base station, and dividing the distance by 2 to obtain the distance between the UWB tag and the UWB base station.
For any UWB base station, if N UWB tags exist in the effective communication range of the UWB base station, the UWB base station receives N response signals, and the UWB base station calculates the N pulse signals respectively to obtain the ranging information between the N UWB tags and the UWB base station. The UWB base station uploads the measured N ranging information to a control device for controlling the fresh air supply volume of the air conditioner.
It should be noted that, because the UWB base stations are arranged at different positions, for the same UWB tag, not all UWB base stations can receive the response signal returned by the UWB tag, and therefore, the number of response signals received by each UWB base station at the same time is not necessarily the same.
Because UWB transmission signal duration is very short, and transmitting power is extremely low, can allow hundreds of UWB tags to fix a position simultaneously, consequently, even there are a plurality of personnel in the laboratory, also can fix a position every personnel very accurately, can not make mistakes.
Step S102, calculating the current positioning information of the laboratory staff according to the ranging information;
in this embodiment, for any UWB tag, the control device performs positioning calculation based on all the ranging information of the UWB tag uploaded by each UWB base station, and obtains the coordinates of the UWB tag.
Step S103, acquiring the current number of the laboratory according to the current positioning information of the laboratory personnel;
if the coordinates of the UWB tags fall within the coordinate range of a laboratory, the laboratory staff to which the UWB tags belong is indicated to be located in the laboratory at present, and the coordinates are recorded; and after the coordinates of all the calculated UWB tags are judged, adding all the coordinate quantities to obtain the current number of the laboratory.
And step S104, controlling the current fresh air supply volume of the air conditioner according to the current number of people in the laboratory.
In the embodiment, when the number of people in the laboratory is small, the current fresh air supply amount is reduced; when the number of people in the laboratory is large, the current fresh air supply volume is increased. The size of the fresh air supply volume can be adjusted by adjusting the air supply valve.
It should be noted that, when no ranging information is acquired in step S101, it indicates that there is no UWB tag in the effective communication range of each UWB base station, and there is no laboratory staff in the laboratory, so that the minimum fresh air volume only considers two factors, i.e., the minimum fresh air volume required by a unit area and the laboratory area, under the condition that no person is present in the laboratory, and the air conditioning fresh air load energy consumption is minimum.
Example two:
referring to fig. 2, a laboratory air conditioner energy-saving control method based on UWB positioning disclosed in the embodiment of the present invention mainly includes the following steps (step S201 to step S209):
step S201, at least three UWB base stations installed in the laboratory broadcast request signals to the outside, respectively.
In this embodiment, at least three UWB base stations are provided in a laboratory (e.g., on a wall, an experimental equipment enclosure, etc.). Since the short-distance transmission distance of the UWB technique is approximately ten or more meters, the number of UWB base stations can be set according to the area of a laboratory. For example, if the maximum distance in a laboratory is 10 meters, only three UWB base stations may be set, and if the area in the laboratory is large and the maximum distance exceeds 10 meters, more than four UWB base stations are required, so that the UWB tag at any position in the laboratory can establish effective communication with the UWB base stations, thereby realizing ranging.
Step S202, the UWB tag receives the request signal and returns a response signal carrying the tag ID.
Every laboratory worker needs to carry with him a UWB tag, each UWB tag having a unique tag ID.
Step S203, for any UWB base station, the UWB base station generates the ranging information according to the received response signal calculation, and the ranging information comprises the label ID carried by the response information.
Taking a UWB base station and a UWB tag as an example, the UWB base station continuously broadcasts request pulse signals outwards, and when the UWB tag is positioned at the UWBA base station within its effective communication range (typically tens of meters) receives the request pulse signal and then returns a response pulse signal carrying its tag ID, which is received by the UWB base station. Measuring the time from the beginning to the return of the pulse signal by using a time-of-flight ranging (ToF) method, and multiplying the time by the propagation speed (the propagation speed of the pulse signal in the air is 3 multiplied by 10)5km/s) to obtain the distance from the UWB tag to the UWB base station, and dividing the distance by 2 to obtain the distance between the UWB tag and the UWB base station.
For any UWB base station, if N UWB tags exist in the effective communication range of the UWB base station, the UWB base station receives N response signals, and the UWB base station calculates the N pulse signals respectively to obtain the ranging information between the N UWB tags and the UWB base station. The UWB base station uploads the measured N ranging information to a control device for controlling the fresh air supply volume of the air conditioner.
It should be noted that, because the UWB base stations are arranged at different positions, for the same UWB tag, not all UWB base stations can receive the response signal returned by the UWB tag, and therefore, the number of response signals received by each UWB base station at the same time is not necessarily the same.
Because UWB transmission signal duration is very short, and transmitting power is extremely low, can allow hundreds of UWB tags to fix a position simultaneously, consequently, even there are a plurality of personnel in the laboratory, also can fix a position every personnel very accurately, can not make mistakes.
Step S204, for any tag ID, all the ranging information corresponding to the tag ID is acquired.
The control device classifies all the ranging information uploaded by each UWB base station according to the tag ID, and concretely, the ranging information with the same tag ID is classified together.
Step S205, when the number of all the ranging information corresponding to the tag ID is not less than 3, calculating according to the ranging information corresponding to the tag ID to obtain the current positioning information of the laboratory staff.
When the total number of the ranging information of one tag ID is 1 or 2, the UWB tag to which the tag ID belongs is not in a laboratory; and when the total number of the ranging information of one tag ID reaches 3 or more, the UWB tag to which the tag ID belongs is possibly positioned in a laboratory, and the UWB tag can be positioned, so that the current positioning information of the laboratory personnel to which the UWB tag belongs is obtained.
When the positioning information is calculated, assuming that three pieces of ranging information of one tag ID exist, coordinates (which are preset) of the UWB base station uploading the three pieces of ranging information are acquired, 3 circles are drawn by a three-point positioning method, and an intersection point of the three circles is the coordinate of the UWB tag to which the tag ID belongs, that is, the current positioning information of the laboratory staff to which the UWB tag belongs.
Step S206, judging whether the UWB tag is in the laboratory or not according to the current positioning information of the laboratory personnel, and recording the current positioning information if the UWB tag is in the laboratory.
If the coordinates of the UWB tag fall within the coordinate range of the laboratory, the laboratory personnel to which the UWB tag belongs is indicated to be currently located in the laboratory, and the coordinates are recorded.
And step S207, summing the number of all recorded current positioning information to obtain the current number of the laboratory.
And after the coordinates of all the calculated UWB tags are judged, adding all the coordinate quantities to obtain the current number of the laboratory.
And S208, calculating to obtain the minimum fresh air volume according to the current number of people in the laboratory, the minimum fresh air volume required by a single person, the minimum fresh air volume required by unit area and the laboratory area.
Optionally, the product of the current number of people in the laboratory and the minimum fresh air volume required by a single person is calculated, and the product of the minimum fresh air volume required by unit area and the laboratory area is calculated, and then the two products are added to obtain the minimum fresh air volume; wherein, the minimum fresh air volume required by a single person and the minimum fresh air volume required by unit area can be set according to the existing standard, and the laboratory area is obtained by specific measurement. The minimum fresh air supply volume obtained by calculation is the minimum air supply volume for ensuring the air quality in the laboratory to reach the standard.
And S209, adjusting the current fresh air supply quantity according to the minimum fresh air supply quantity.
The size of the fresh air supply volume can be adjusted by adjusting the air supply valve.
It should be noted that, when no ranging information is acquired in step S201, it indicates that there is no UWB tag in the effective communication range of each UWB base station, and there is no laboratory staff in the laboratory, so that the minimum fresh air volume only considers two factors, i.e., the minimum fresh air volume required by a unit area and the laboratory area, under the condition that no person is present in the laboratory, and the fresh air load of the air conditioner is minimum.
Example three:
referring to fig. 3, a laboratory air conditioner energy-saving control system based on UWB positioning disclosed in the embodiment of the present invention mainly includes: the UWB ranging module 301 is configured to include a UWB base station 3011 and a UWB tag 3012, and is configured to acquire ranging information between a laboratory person and the UWB base station 3011 through communication between the UWB base station 3011 and the UWB tag 3012; the positioning calculation module 302 is connected with the UWB ranging module 301 and used for calculating the current positioning information of the laboratory personnel according to the ranging information; the current number obtaining module 303 is connected with the positioning calculating module 302 and is used for obtaining the current number of the laboratory according to the current positioning information of the laboratory personnel; and the air supply amount control module 304 is connected with the current number of people acquisition module 303 and is used for controlling the current fresh air supply amount of the air conditioner according to the current number of people in the laboratory.
In this embodiment, at least three UWB base stations 3011 are installed in a laboratory (for example, on a wall, a housing of experimental equipment, etc.), and each laboratory person needs to carry a UWB tag 3012 with him. The positioning calculation module 302, the current number of people acquisition module 303 and the air supply amount control module 304 are all arranged at the control end of the laboratory air conditioning system.
Since the short-distance transmission distance of the UWB technique is approximately ten or more meters, the number of UWB base stations 3011 can be set according to the area of a laboratory. For example, if the maximum distance in a laboratory is 10 meters, only three UWB base stations 3011 may be set, and if the area of the laboratory is large and the maximum distance exceeds 10 meters, more than four UWB base stations 3011 are needed, so that the UWB tag 3012 at any position in the laboratory can establish effective communication with the UWB base stations 3011, thereby achieving ranging.
Taking a UWB base station 3011 and a UWB tag 3012 as an example, the UWB base station 3011 continuously broadcasts a request pulse signal to the outside, and when the UWB tag 3012 is located within an effective communication range (typically, tens of meters) of the UWB base station 3011, the request pulse signal is received, and then a response pulse signal is returned, and the UWB base station 3011 receives the response signal. Measuring the time from the beginning to the return of the pulse signal by using a time-of-flight ranging (ToF) method, and multiplying the time by the propagation speed (the propagation speed of the pulse signal in the air is 3 multiplied by 10)5km/s) to obtain the distance from the UWB tag 3012 to the UWB base station 3011, and dividing by 2.
For any UWB base station 3011, if there are N UWB tags 3012 in the effective communication range of the UWB base station 3011, the UWB base station 3011 receives N response signals, and the UWB base station 3011 calculates the N pulse signals respectively to obtain ranging information between the N UWB tags 3012 and the UWB base station 3011. The UWB base station 3011 uploads the measured N ranging information to the control end of the air conditioning system.
It should be noted that, because the UWB base stations 3011 are arranged at different positions, for the same UWB tag 3012, not all UWB base stations 3011 can receive the response signal returned by the UWB tag 3012, and therefore, the number of response signals received by each UWB base station 3011 at the same time is not necessarily the same.
Because the UWB transmission signal duration is short, the transmission power is extremely low, and hundreds of UWB tags 3012 can be allowed to be positioned at the same time, even if there are a plurality of persons in the laboratory, each person can be positioned accurately without making mistakes.
In this embodiment, for any UWB tag, the positioning calculation module 302 performs positioning calculation according to all ranging information of the UWB tag 3012 uploaded by each UWB base station, to obtain coordinates of the UWB tag 3012.
If the coordinates of the UWB tag 3012 fall within the coordinate range of the laboratory, it is indicated that the laboratory person to which the UWB tag 3012 belongs is currently located in the laboratory, and the coordinates are recorded; and after all the calculated coordinates of the UWB tag 3012 are judged, adding all the coordinate quantities to obtain the current number of the laboratory.
In this embodiment, when the number of people in the laboratory is small, the air supply amount control module 304 decreases the current fresh air supply amount; when the number of people in the laboratory is large, the air supply amount control module 304 increases the current fresh air supply amount. The air supply amount control module 304 can adjust the amount of fresh air supply by adjusting an air supply valve.
It should be noted that when the UWB ranging module 301 does not acquire any ranging information, it indicates that there is no UWB tag 3012 in the effective communication range of each UWB base station 3011 and there is no laboratory technician, so that the minimum fresh air volume only considers two factors, i.e., the minimum fresh air volume required by a unit area and the laboratory area, under the condition that no person is present in the laboratory, and the air conditioning fresh air load energy consumption is minimum.
Example four:
referring to fig. 4, a laboratory air conditioner energy-saving control system based on UWB positioning disclosed in the embodiment of the present invention includes: a UWB ranging module 401, configured to acquire ranging information between a laboratory worker and the UWB base station 4011 through communication between the UWB base station 4011 and the UWB tag 4012; the positioning calculation module 402 is connected with the UWB ranging module 401 and is used for calculating current positioning information of the laboratory staff according to the ranging information; the current number obtaining module 403 is connected to the positioning calculating module 402, and is configured to obtain the current number of the laboratory according to the current positioning information of the laboratory staff; and the air supply amount control module 404 is connected with the current number of people acquisition module 403 and is used for controlling the current fresh air supply amount of the air conditioner according to the current number of people in the laboratory.
As shown in fig. 4, the UWB ranging module 401 includes: at least three UWB base stations 4011 arranged in the laboratory and used for broadcasting request signals outwards respectively; the UWB tag 4012 is configured to receive the request signal and return a response signal carrying a tag ID; the UWB base station 4011 is further configured to calculate and generate ranging information according to the received response signal, where the ranging information includes a tag ID carried by the response information.
In this embodiment, at least three UWB base stations 4011 are installed in a laboratory (for example, on a wall, a housing of an experimental device, or the like), and each laboratory worker needs to carry a UWB tag 4012 with him, and each UWB tag 4012 has a unique tag ID. The positioning calculation module 402, the current number of people acquisition module 403 and the air supply amount control module 404 are all arranged at the control end of the laboratory air conditioning system.
Since the short-distance transmission distance of the UWB technique is about ten or more meters, the number of UWB base stations 4011 can be set according to the area of a laboratory. For example, if the maximum distance in a laboratory is 10 meters, only three UWB base stations 4011 may be set, and if the area in the laboratory is large and the maximum distance exceeds 10 meters, more than four UWB base stations 4011 are needed, so that the UWB tag 4012 at any position in the laboratory can establish effective communication with the UWB base stations 4011, and ranging is achieved.
Taking a UWB base station 4011 and a UWB tag 4012 as an example, the UWB base station 4011 continuously broadcasts a request pulse signal to the outside, and when the UWB tag 4012 is located within an effective communication range (typically, tens of meters) of the UWB base station 4011, the request pulse signal is received, and then a response pulse signal carrying its tag ID is returned, and the UWB base station 4011 receives the response signal. Measuring the time from the beginning to the return of the pulse signal by using a time-of-flight ranging (ToF) method, and multiplying the time by the propagation speed (the propagation speed of the pulse signal in the air is 3 multiplied by 10)5km/s) to obtain the distance from the UWB tag 4012 to the UWB base station 4011, and dividing the distance by 2.
For any UWB base station 4011, if N UWB tags 4012 exist in the effective communication range of the UWB base station 4011, the UWB base station 4011 receives N response signals, and the UWB base station 4011 calculates the N pulse signals, respectively, to obtain ranging information between the N UWB tags 4012 and the UWB base station 4011. The UWB base station 4011 uploads the measured N ranging information to the location calculation module 402 at the control end of the air conditioning system.
It should be noted that, because the UWB base stations 4011 are arranged at different positions, for the same UWB tag 4012, not all UWB base stations 4011 can receive the response signal returned by the UWB tag 4012, and therefore, the number of response signals received by each UWB base station 4011 at the same time is not necessarily the same.
Because the UWB transmission signal duration is very short, the transmission power is extremely low, and hundreds of UWB tags 4012 can be allowed to be simultaneously located, even if there are a plurality of persons in the laboratory, each person can be accurately located without making mistakes.
For any tag ID, the positioning calculation module 402 obtains all ranging information corresponding to the tag ID, and performs classification statistics on all ranging information uploaded by each UWB base station according to the tag ID, that is, the ranging information with the same tag ID is classified together.
When the number of all the ranging information corresponding to the tag ID is not less than 3, the positioning calculation module 402 performs calculation according to the ranging information corresponding to the tag ID to obtain the current positioning information of the laboratory staff. Specifically, when the total number of the ranging information of one tag ID is 1 or 2, it indicates that the UWB tag 4012 to which the tag ID belongs is not in the laboratory; when the total number of the ranging information of one tag ID reaches 3 or more, it indicates that the UWB tag 4012 to which the tag ID belongs may be located in a laboratory, and the UWB tag 4012 may be located, so as to obtain the current location information of the laboratory staff to which the UWB tag 4012 belongs.
When the positioning calculation module 402 calculates the positioning information, it is assumed that there are three pieces of ranging information of one tag ID, and the coordinates (preset coordinates) of the UWB base station 4011 that uploads the three pieces of ranging information are obtained, 3 circles are drawn by a three-point positioning method, and the intersection point is the coordinate of the UWB tag 4012 to which the tag ID belongs, that is, the current positioning information of the laboratory staff to which the UWB tag 4012 belongs.
As shown in fig. 4, the current number of people obtaining module 403 includes: a recording module 4031 connected to the positioning calculation module 402, configured to determine whether the UWB tag 4012 is located in the laboratory according to current positioning information of a laboratory worker, and record the current positioning information if the current positioning information is located in the laboratory; and the summing module 4032 is connected to the recording module 4031 and is configured to sum the number of the current positioning information recorded, so as to obtain the current number of people in the laboratory.
If the coordinates of the UWB tag 4012 fall within the coordinate range of the laboratory, the laboratory staff to which the UWB tag 4012 belongs is indicated to be currently located in the laboratory, and the coordinates are recorded; and after all the calculated coordinates of the UWB tag 4012 are judged, adding all the coordinate quantities to obtain the current number of the laboratory.
As shown in fig. 4, the air flow control module 404 includes: the air supply quantity calculating module 4041 is connected with the recording module 4031 and is used for calculating the minimum fresh air supply quantity according to the current number of people in the laboratory, the minimum fresh air quantity required by a single person, the minimum fresh air quantity required by unit area and the laboratory area; and the air supply quantity adjusting module 4042 is connected with the air supply quantity calculating module 4041 and is used for adjusting the current fresh air supply quantity according to the minimum fresh air supply quantity.
Optionally, the air supply amount calculation module 4041 calculates the product of the current number of people in the laboratory and the minimum fresh air amount required by a single person, and the product of the minimum fresh air amount required by a unit area and the laboratory area, and adds the two products to obtain the minimum fresh air supply amount; wherein, the minimum fresh air volume required by a single person and the minimum fresh air volume required by unit area can be set according to the existing standard, and the laboratory area is obtained by specific measurement. The minimum fresh air supply amount calculated by the air supply amount calculation module 4041 is the minimum air supply amount which ensures that the air quality in the laboratory reaches the standard.
The air supply quantity adjusting module 4042 adjusts the fresh air supply quantity by adjusting an air supply valve.
It should be noted that when the UWB ranging module 401 does not acquire any ranging information, it indicates that there is no UWB tag 4012 in the effective communication range of each UWB base station 4011 and there is no laboratory technician in the laboratory, so that the minimum fresh air volume only considers two factors, i.e., the minimum fresh air volume required by a unit area and the laboratory area, under the circumstance that no one is present in the laboratory, and the fresh air load of the air conditioner is minimized.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (10)

1. A laboratory air conditioner energy-saving control method based on UWB positioning is characterized by comprising the following steps:
acquiring ranging information between laboratory personnel and a UWB base station through communication between the UWB base station and a UWB tag;
calculating the current positioning information of the laboratory personnel according to the ranging information;
acquiring the current number of the laboratory according to the current positioning information of the laboratory personnel;
and controlling the current fresh air supply volume of the air conditioner according to the current number of people in the laboratory.
2. The energy-saving control method for laboratory air conditioners based on UWB positioning according to claim 1, wherein the obtaining of ranging information between a laboratory person and the UWB base station through communication between the UWB base station and UWB tags comprises:
at least three UWB base stations arranged in a laboratory respectively broadcast request signals outwards;
the UWB tag receives the request signal and returns a response signal carrying a tag ID;
and for any UWB base station, the UWB base station calculates and generates the ranging information according to the received response signal, and the ranging information comprises the tag ID carried by the response information.
3. The energy-saving control method for laboratory air conditioners based on UWB positioning according to claim 2, wherein the calculating the current positioning information of laboratory personnel according to the ranging information comprises:
for any tag ID, acquiring all ranging information corresponding to the tag ID;
and when the number of all the ranging information corresponding to the tag ID is not less than 3, calculating according to the ranging information corresponding to the tag ID to obtain the current positioning information of the laboratory staff.
4. The energy-saving control method for laboratory air conditioners based on UWB positioning according to claim 2 or 3, wherein the obtaining of the current number of the laboratory people according to the current positioning information of the laboratory people comprises:
judging whether the UWB tag is in the laboratory or not according to the current positioning information of the laboratory staff, and if so, recording the current positioning information of the laboratory staff;
and summing the number of all recorded current positioning information to obtain the current number of the laboratory.
5. The UWB positioning-based energy-saving control method for the air conditioner in the laboratory, wherein the controlling of the fresh air volume of the air conditioner according to the current number of people in the laboratory comprises the following steps:
calculating to obtain the minimum fresh air volume according to the current number of the laboratory, the minimum fresh air volume required by a single person, the minimum fresh air volume required by unit area and the laboratory area;
and adjusting the current fresh air supply quantity according to the minimum fresh air supply quantity.
6. The utility model provides a laboratory air conditioner energy-saving control system based on UWB location which characterized in that includes:
the UWB ranging module is used for acquiring ranging information between laboratory personnel and the UWB base station through communication between the UWB base station and the UWB tag;
the positioning calculation module is connected with the UWB ranging module and used for calculating the current positioning information of the laboratory personnel according to the ranging information;
the current number obtaining module is connected with the positioning calculating module and used for obtaining the current number of the laboratory according to the current positioning information of the laboratory personnel;
and the air supply amount control module is connected with the current number acquisition module and used for controlling the current fresh air supply amount of the air conditioner according to the current number of the laboratory.
7. The UWB positioning-based laboratory air conditioner energy-saving control system of claim 6 wherein the UWB ranging module comprises:
the UWB base stations are arranged in the laboratory and used for broadcasting request signals outwards respectively;
the UWB tag is used for receiving the request signal and returning a response signal carrying a tag ID;
the UWB base station is further used for calculating and generating the ranging information according to the received response signal, and the ranging information comprises the tag ID carried by the response information.
8. The energy-saving control system for laboratory air conditioners based on UWB positioning according to claim 7, wherein the positioning calculation module is specifically configured to acquire all ranging information corresponding to any tag ID for the tag ID, and when the number of all ranging information corresponding to the tag ID is not less than 3, perform calculation according to the ranging information corresponding to the tag ID to obtain the current positioning information of the laboratory staff.
9. The energy-saving control system for laboratory air conditioners based on UWB positioning according to claim 7 or 8, wherein the current number of people obtaining module comprises:
the recording module is used for judging whether the UWB tag is in the laboratory or not according to the current positioning information of the laboratory staff, and recording the current positioning information of the laboratory staff if the UWB tag is in the laboratory;
and the summation module is connected with the recording module and is used for summing and calculating the number of all recorded current positioning information to obtain the current number of the laboratory.
10. The UWB positioning-based laboratory air conditioner energy conservation control system of claim 9, wherein the air volume control module comprises:
the air supply quantity calculation module is used for calculating to obtain the minimum fresh air supply quantity according to the current number of people in the laboratory, the minimum fresh air quantity required by a single person, the minimum fresh air quantity required by unit area and the laboratory area;
and the air supply quantity adjusting module is connected with the air supply quantity calculating module and is used for adjusting the current fresh air supply quantity according to the minimum fresh air supply quantity.
CN201911319626.8A 2019-12-19 2019-12-19 Laboratory air conditioner energy-saving control method and system based on UWB positioning Pending CN110986297A (en)

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