CN111271813A - Humidity detection method, humidity detection system and electronic device - Google Patents
Humidity detection method, humidity detection system and electronic device Download PDFInfo
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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
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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
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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
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Abstract
The application provides a humidity detection method, a humidity detection system and an electronic device. The millimeter wave signal has the characteristic of strong anti-interference capability, and the influence of other electromagnetic waves on the millimeter wave signal can be avoided. And the water molecule has higher absorptivity to millimeter waves, high detection precision and accurate control. By judging whether the second frequency parameter is equal to the first frequency parameter, the interference caused by moving objects (with changed frequencies) in the environment can be eliminated. According to the second wave intensity parameter and the first wave intensity parameter, the degree of the millimeter waves absorbed by water vapor in the wave advancing process can be obtained, and then the humidity information of the environment can be obtained. Therefore, the humidity detection method can timely react to the humidity change of the environment, and the detection is more accurate and the adjustment and control are easy to carry out by eliminating the interference and comparing the wave intensity.
Description
Technical Field
The present disclosure relates to the field of environmental humidity detection technologies, and in particular, to a humidity detection method, a humidity detection system, and an electronic device.
Background
With the development of social science and technology, electrical appliances become essential articles in people's lives. Some electrical appliances (such as air conditioners, dehumidifiers, etc.) need to be controlled based on temperature, humidity, etc. Therefore, the regulation of humidity information in the environment becomes a great concern.
However, in order to solve the problem that the ambient humidity is too low and dry due to the frequent incomplete dehumidification, the constant dehumidification state, or the too long dehumidification time (excessive dehumidification), the conventional humidity detection method, humidity detection system and electronic device have slow response to the humidity change of the environment, so that the detection is inaccurate and the adjustment control cannot be performed in time.
Disclosure of Invention
Therefore, it is necessary to provide a humidity detection method, a humidity detection system and an electronic device, aiming at the problems of inaccurate detection and incapability of timely adjustment and control caused by slow response of humidity change detected by the conventional humidity detection method, humidity detection system and electronic device.
The application provides a humidity detection method, which comprises the following steps:
s10, transmitting a millimeter wave signal to the environment, and acquiring a first frequency parameter and a first wave intensity parameter of the millimeter wave signal;
s20, forming a millimeter wave reflection signal by the reflection of the detection object in the environment, acquiring the millimeter wave reflection signal, and acquiring a second frequency parameter of the millimeter wave reflection signal;
s30, determining whether the second frequency parameter is equal to the first frequency parameter;
s40, if the second frequency parameter is equal to the first frequency parameter, acquiring a second intensity parameter of the millimeter wave reflected signal;
and S50, acquiring the humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter.
In one embodiment, the humidity detection method further comprises:
and if the second frequency parameter is not equal to the first frequency parameter, discarding the millimeter wave reflection signal.
In one embodiment, acquiring humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter includes:
in a period, calculating and obtaining a wave intensity mean difference parameter according to the second wave intensity parameter and the first wave intensity parameter;
and comparing the wave intensity mean difference parameter with the first wave intensity parameter to acquire the humidity information of the environment.
In one embodiment, the obtaining humidity information of the environment according to the comparison between the wave intensity mean-difference parameter and the first wave intensity parameter includes:
if the wave intensity mean difference parameter is equal to the first wave intensity parameter, the environment does not need to be dehumidified;
if the wave intensity mean difference parameter is smaller than the first wave intensity parameter, dehumidifying the environment;
and if the wave intensity mean difference parameter is less than one half of the first wave intensity parameter, enhancing the dehumidification of the environment.
In one embodiment, the humidity detection method is applied to an air conditioning device, and obtains the humidity information of the environment by comparing the wave intensity mean difference parameter with the first wave intensity parameter, and includes:
if the wave intensity mean difference parameter is equal to the first wave intensity parameter, closing the dehumidification function of the air conditioning equipment;
if the wave intensity average difference parameter is smaller than the first wave intensity parameter, maintaining the dehumidification function of the air conditioning equipment;
and if the wave intensity average difference parameter is less than one half of the first wave intensity parameter, increasing the dehumidification intensity of the air conditioning equipment.
In one embodiment, if the second frequency parameter is equal to the first frequency parameter, acquiring a second intensity parameter of the millimeter wave reflection signal includes:
and if the second frequency parameter is the same as the first frequency parameter, performing analog-to-digital conversion on the millimeter wave reflection signal to obtain the second intensity parameter of the millimeter wave reflection signal.
In one embodiment, after acquiring the humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter, the millimeter wave signal is continuously transmitted to the environment for real-time humidity detection.
In one embodiment, the present application provides a humidity detection system including a millimeter wave transmitting unit, a millimeter wave receiving unit, a filtering unit, and a control unit. The millimeter wave transmitting unit is used for transmitting a millimeter wave signal to the environment and acquiring a first frequency parameter and a first wave intensity parameter of the millimeter wave signal. The millimeter wave receiving unit is used for receiving the millimeter wave reflection signal and acquiring a second frequency parameter of the millimeter wave reflection signal. The filtering unit is used for acquiring the millimeter wave reflection signal with the second frequency parameter equal to the first frequency parameter and transmitting the millimeter wave reflection signal to the control unit. The control unit is used for acquiring a second wave intensity parameter of the millimeter wave reflection signal according to the millimeter wave reflection signal and acquiring the humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter.
In one embodiment, the control unit includes an analog-to-digital conversion unit and a main control unit. The analog-to-digital conversion unit is used for performing analog-to-digital conversion on the millimeter wave reflection signal to acquire the second intensity parameter of the millimeter wave reflection signal. And the main control unit is used for acquiring the humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter.
In one embodiment, the master control unit comprises a wave intensity contrast module and a master control reaction module. And the wave intensity comparison module is used for calculating and acquiring a wave intensity mean difference parameter according to the second wave intensity parameter and the first wave intensity parameter and comparing the wave intensity mean difference parameter with the first wave intensity parameter. The master control reaction module is used for acquiring wave intensity contrast information of the wave intensity mean difference parameter and the first wave intensity parameter, and acquiring humidity information of the environment according to the wave intensity contrast information.
In one embodiment, the master control unit further comprises an environmental device control module. And the environmental equipment control module is used for regulating and controlling environmental equipment according to the humidity information.
In one embodiment, the present application provides an electronic device. The electronic device comprises a humidity detection system as described in any of the above embodiments.
The application provides the humidity detection method, the humidity detection system and the electronic device. In S10, the environment may be a room such as an indoor room or an outdoor room. The millimeter wave signal has the characteristic of strong anti-interference capability, and the influence of other electromagnetic waves on the millimeter wave signal can be avoided. Furthermore, the millimeter wave signal can enable the humidity detection to be more accurate, and is favorable for obtaining the humidity information of the environment. Meanwhile, the first frequency parameter f is obtained according to the millimeter wave signal0And the first intensity parameter&0. Wherein the first frequency parameter f0Is the fixed frequency of the millimeter wave signal. The first intensity parameter&0Is the wave strength of the millimeter wave signal.
In S20, the object to be detected may be a moving or stationary object, a human or an animal, or the like. And after the millimeter wave signal irradiates the detection object, the millimeter wave reflection signal is formed. During the process of the millimeter wave reflected signal propagation, the millimeter wave reflected signal can touch a static or moving object or a human or an animal. Wherein, the object or people or animal that is static is the target detection point, and the object or people or animal that moves can produce false detection point, influences whole detection process.
When having the first frequency parameter f0When the millimeter wave reflection signal irradiates the detection object in the environment, if the detection object is a static object or a human or an animal, the frequency of the millimeter wave reflection signal reflected back is not changed and is still f0. In this case, the second frequency parameter is equal to the first frequency parameter and is f0。
If the detected object is a moving object or a person or an animal (such as a toy car, a rotating electric fan, a fluttering curtain or a person), the frequency of the reflected millimeter wave reflected signal changes, and the Doppler frequency f brought by the moving object or the person or the animal is addedd. At this time, the second frequency parameter of the received waveform is not equal to the first frequency parameter, and becomes f0±fdThe frequency changes.
Therefore, by determining whether the second frequency parameter is equal to the first frequency parameter at S30, it is possible to determine whether the detection object is moving or stationary. If the detected object is stationary, the second frequency parameter is equal to the first frequency parameter and is f0And acquiring the second wave intensity parameter of the millimeter wave reflection signal according to the step S40 for continuing humidity detection. At this time, through the S30 and the S40, the interference caused by the moving object (the frequency of which changes) in the environment can be eliminated, and the humidity information of the environment can be acquired more accurately.
The water molecule has higher absorptivity to millimeter waves, high detection precision and accurate control. During the travel of the waves, the millimeter waves are absorbed by water vapor in the environment. At this time, the wave intensity of the millimeter wave reflection signal has changed to the second wave intensity parameter&1. At this time, the first intensity parameter is passed&0And the second intensity parameter&1The degree of millimeter waves absorbed by water vapor in the wave traveling process can be obtained, and therefore the humidity information of the environment can be obtained.
Therefore, through the steps of S30 and S40, interference caused by a moving object (a change in frequency) in the environment can be eliminated. Meanwhile, according to the first intensity parameter, through the S50&0And the second intensity parameter&1The degree of millimeter waves absorbed by water vapor in the wave traveling process can be obtained, and the humidity information of the environment can be obtained. Therefore, the humidity detection method can timely react to the humidity change of the environment, and the detection is more accurate and the adjustment and control are easy to carry out by eliminating the interference and comparing the wave intensity.
Drawings
FIG. 1 is a schematic flow chart of a humidity detection method provided herein;
fig. 2 is a schematic diagram of millimeter wave transmission provided in the present application;
FIG. 3 is a graph comparing millimeter wave intensity to humidity provided herein;
fig. 4 is a schematic diagram of an indoor multi-path generation detection point provided by the present application;
FIG. 5 is a schematic diagram of a waveform (millimeter wave reflection) received according to the present application;
FIG. 6 is a functional block diagram of a wetness detection system provided herein;
fig. 7 is a schematic model diagram of a humidity detection system provided in the present application.
Description of the reference numerals
The device comprises a millimeter wave transmitting unit 10, a millimeter wave receiving unit 20, a filtering unit 30, a control unit 40, an analog-to-digital conversion unit 410, a main control unit 420, a wave intensity comparison module 421, a main control reaction module 422 and an environmental equipment control module 423.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by way of embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, the present application provides a humidity detection method, including:
s10, transmitting a millimeter wave signal to the environment, and acquiring a first frequency parameter and a first wave intensity parameter of the millimeter wave signal;
s20, forming a millimeter wave reflection signal by the reflection of the detection object in the environment, acquiring the millimeter wave reflection signal, and acquiring a second frequency parameter of the millimeter wave reflection signal;
s30, determining whether the second frequency parameter is equal to the first frequency parameter;
s40, if the second frequency parameter is equal to the first frequency parameter, acquiring a second intensity parameter of the millimeter wave reflected signal;
and S50, acquiring the humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter.
In S10, the environment may be a room such as an indoor room or an outdoor room. The millimeter wave signal has the characteristic of strong anti-interference capability, and the influence of other electromagnetic waves on the millimeter wave signal can be avoided. Furthermore, the millimeter wave signal can enable the humidity detection to be more accurate, and is favorable for obtaining the humidity information of the environment. Meanwhile, the first frequency parameter f is obtained according to the millimeter wave signal0And the first intensity parameter&0. Wherein the first frequency parameter f0Is the fixed frequency of the millimeter wave signal. The first intensity parameter&0Is the wave strength of the millimeter wave signal.
Referring to fig. 2 to 5, in S20, the object to be detected may be a moving or stationary object, a human or an animal, or the like. And after the millimeter wave signal irradiates the detection object, the millimeter wave reflection signal is formed. In fig. 2, the respective different shapes represent different objects, and the broken lines represent the millimeter wave signal and the millimeter wave reflected signal, respectively.
Referring to fig. 4, in the process of the millimeter wave reflected signal propagation, a stationary or moving object or a human or an animal may be encountered. Wherein, the object or people or animal that is static is the target detection point, and the object or people or animal that moves can produce false detection point, influences whole detection process.
In particular, when having said first frequency parameter f0When the millimeter wave reflection signal irradiates the detection object in the environment, if the detection object is a static object or a human or an animal, the frequency of the millimeter wave reflection signal reflected back is not changed and is still f0. In this case, the second frequency parameter is equal to the first frequency parameter and is f0。
If the object to be detected is a moving object or a human or animal (e.g. toy car, rotating electric fan, waving)Curtain, person, etc.), the frequency of the reflected millimeter wave reflected signal changes, and the doppler frequency f brought by the object or person or animal moving additionallyd. At this time, the second frequency parameter of the received waveform is not equal to the first frequency parameter, and becomes f0±fdThe frequency changes.
Therefore, by determining whether the second frequency parameter is equal to the first frequency parameter at S30, it is possible to determine whether the detection object is moving or stationary. If the detected object is stationary, the second frequency parameter is equal to the first frequency parameter and is f0And acquiring the second wave intensity parameter of the millimeter wave reflection signal according to the step S40 for continuing humidity detection.
Through the S30 and the S40, the interference caused by the moving object (the frequency changes) in the environment can be eliminated, and the humidity information of the environment can be acquired more accurately.
Referring to fig. 3, fig. 3 is a comparison graph of millimeter wave intensity and humidity. The water molecule has higher absorptivity to millimeter waves, high detection precision and accurate control. During the travel of the waves, the millimeter waves are absorbed by water vapor in the environment. At this time, the wave intensity of the millimeter wave reflection signal has changed to the second wave intensity parameter&1. At this time, the first intensity parameter is passed&0And the second intensity parameter&1The degree of millimeter waves absorbed by water vapor in the wave traveling process can be obtained, and therefore the humidity information of the environment can be obtained.
Therefore, through the steps of S30 and S40, interference caused by a moving object (a change in frequency) in the environment can be eliminated. Meanwhile, according to the first intensity parameter, through the S50&0And the second intensity parameter&1The degree of millimeter waves absorbed by water vapor in the wave traveling process can be obtained, and the humidity information of the environment can be obtained. Thus, the humidity detection method can timely react to the humidity change of the environment and eliminate interferenceCompared with the wave intensity, the detection is more accurate, and the adjustment and control are easy to carry out.
In one embodiment, the humidity detection method further comprises:
and if the second frequency parameter is not equal to the first frequency parameter, discarding the millimeter wave reflection signal.
When the detection object is a moving object or a person or an animal (such as a toy car, a rotating electric fan, a fluttering curtain or a person and the like), the frequency of the millimeter wave reflection signal reflected back can be changed, and the Doppler frequency f brought by the moving object or the person or the animal is addedd. At this time, the second frequency parameter of the received waveform is not equal to the first frequency parameter, and becomes f0±fdThe frequency changes. At this time, the second frequency parameter is not equal to the first frequency parameter and will have a frequency f0±fdThe millimeter wave reflection signal is discarded without participating in the humidity detection process. Thus, by having a frequency f0±fdThe millimeter wave reflected signal is discarded, so that the interference caused by moving objects (the frequency is changed) in the environment can be eliminated, and the humidity information of the environment can be acquired more accurately.
In one embodiment, the step S50 of obtaining humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter includes:
s510, in a period, calculating and obtaining a wave intensity mean difference parameter according to the second wave intensity parameter and the first wave intensity parameter;
s520, comparing the wave intensity mean difference parameter with the first wave intensity parameter to obtain the humidity information of the environment.
In the step S510, in a period, according to a formula
Calculating the wave intensity mean difference parameter&', in the formula&0Is the first wave intensity parameter and is a second wave intensity parameter,&1is the second intensity parameter.
In S520, the wave intensity mean-difference parameter is obtained through calculation, so as to realize the comparison between the wave intensity of the millimeter wave reflection signal and the wave intensity of the millimeter wave signal, that is, the comparison before and after the millimeter wave reflection signal is absorbed by water vapor and is not absorbed by water vapor. And, the wave intensity mean difference parameter&' may reflect the degree of variation of the wave intensity of the millimeter wave signal and the wave intensity of the millimeter wave reflected signal, and the degree of dispersion of the related data parameter after the analog-to-digital conversion. According to the wave intensity mean difference parameter&' with said first intensity parameter&0And (the humidity is not absorbed by the water vapor in the environment) to obtain the influence degree of the humidity in the environment on the wave intensity, so that the humidity information of the environment can be more accurately obtained.
In one embodiment, the step S520 of comparing the wave strength mean-difference parameter with the first wave strength parameter to obtain humidity information of the environment includes:
s521, if the wave intensity mean difference parameter is equal to the first wave intensity parameter, dehumidifying the environment is not needed;
s522, if the wave intensity mean difference parameter is smaller than the first wave intensity parameter, dehumidifying the environment;
s523, if the wave strength mean difference parameter is less than one half of the first wave strength parameter, the dehumidification of the environment is enhanced.
Wave intensity is the energy per unit area perpendicular to the direction of propagation per unit time. Water molecules have high absorption to millimeter waves, and the wave intensity can be changed after the water molecules are absorbed by water vapor in the environment.
In the step S521, when the wave intensity average difference parameter is&' with said first intensity parameter&0And the signals are equal, namely the millimeter wave signals are not absorbed by water vapor in the environment during the transmission process. Therefore, when the wave intensity average difference parameter&' with said first intensity parameter&0When equal, there is no need to dehumidify the environment.
In the step S522, the average difference between the wave intensities&' less than the firstParameter of one wave intensity&0When the millimeter wave signal is absorbed by water vapor in the environment during transmission, the presence of water vapor is indicated. Therefore, when the wave intensity average difference parameter&' less than said first intensity parameter&0In time, the environment needs to be dehumidified.
In the step S523, the average difference of wave intensities is measured&' less than one-half of the first wave strength parameter (i.e., 1/2)&0) In time, namely, the millimeter wave signal is absorbed by water vapor in the environment more in the transmission process, which indicates that more water vapor exists. Therefore, when the wave intensity average difference parameter&' less than one-half of the first wave strength parameter (i.e., 1/2)&0) In time, the environment is enhanced to be dehumidified.
Therefore, according to the wave intensity average difference parameter&' with said first intensity parameter&0The degree of absorption of the millimeter waves by water vapor during the traveling of the wave is known. And the detection is divided according to different degrees, different measures are taken, and the humidity change of the environment is responded in time, so that the detection is more accurate, and the adjustment and control are easy to carry out.
In one embodiment, the humidity detection method is applied to an air conditioning device, and the step S520 of obtaining the humidity information of the environment according to the comparison between the wave intensity mean-difference parameter and the first wave intensity parameter includes:
if the wave intensity mean difference parameter is equal to the first wave intensity parameter, closing the dehumidification function of the air conditioning equipment;
if the wave intensity average difference parameter is smaller than the first wave intensity parameter, maintaining the dehumidification function of the air conditioning equipment;
and if the wave intensity average difference parameter is less than one half of the first wave intensity parameter, increasing the dehumidification intensity of the air conditioning equipment.
When the humidity detection method is applied to an air conditioning apparatus, the air conditioning apparatus is placed indoors. At this time, the environment is an indoor environment, and the detection object is an indoor wall, a sofa, a person, a pet, or other stationary or moving object.
When the wave intensity mean difference parameter&' with said first intensity parameter&0And when the difference is equal, the dehumidification function of the air conditioning equipment is closed. At this time, the air conditioning apparatus does not dehumidify the room. When the wave intensity mean difference parameter&' less than said first intensity parameter&0And when the dehumidification function of the air conditioning equipment is maintained, the indoor dehumidification is continued. When the wave intensity mean difference parameter&' less than one-half of the first wave strength parameter (i.e., 1/2)&0) And in time, the dehumidification strength of the air conditioning equipment is increased, and the indoor dehumidification strength is increased.
Therefore, the humidity detection method is applied to the air conditioning equipment, and the dehumidification intensity of the air conditioning equipment can be controlled and adjusted in time. Therefore, the user can not only feel good in temperature, but also meet the requirements of the user in humidity.
In one embodiment, if the second frequency parameter is equal to the first frequency parameter, acquiring a second intensity parameter of the millimeter wave reflection signal includes:
and if the second frequency parameter is the same as the first frequency parameter, performing analog-to-digital conversion on the millimeter wave reflection signal to obtain the second wave intensity parameter of the millimeter wave reflection signal.
Wave intensity is the energy per unit area perpendicular to the direction of propagation per unit time and is generally expressed in terms of energy flow density. Power flow P wSu uS ρ A2ω2sin ω (t-x/ω), mean energy flow P-＝w-Su＝1/2uSρA2ω2Intensity of wave&＝W-u/2uρA2ω2. Wherein, the change of the wave intensity can be judged according to the difference of the speed.
Referring to fig. 5, fig. 5 is a schematic waveform diagram of the millimeter wave reflection signal. By judging the second frequency parameter f1And the first frequency parameter f0And if the signals are the same, screening out the millimeter waves with different frequencies to obtain the millimeter wave reflection signals with the same frequencies. Further, the millimeter wave reflected signals having the same frequency are subjected to analog-to-digital conversion, i.e., sampling, quantization,Coding, etc., to convert continuous analog quantities into discrete digital quantities by sampling. Thereby obtaining the second intensity parameter in one period&1And is related to the first intensity parameter&0Comparing, calculating and obtaining the wave intensity average difference parameter&’。
In one embodiment, after acquiring the humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter, the millimeter wave signal is continuously transmitted to the environment for real-time humidity detection.
By continuously transmitting the millimeter wave signals to the environment, the humidity of the environment can be detected in real time, and the humidity change can be responded in time. Therefore, corresponding measures are taken to solve the humidity change situation, and a better feeling is given to a user.
Referring to fig. 6, in an embodiment, the present application provides a humidity detection system, which includes a millimeter wave transmitting unit 10, a millimeter wave receiving unit 20, a filtering unit 30, and a control unit 40. The millimeter wave transmitting unit 10 is configured to transmit a millimeter wave signal to an environment, and acquire a first frequency parameter and a first intensity parameter of the millimeter wave signal. The millimeter wave receiving unit 20 is configured to receive the millimeter wave reflection signal and obtain a second frequency parameter of the millimeter wave reflection signal. The filtering unit 30 is configured to obtain the millimeter wave reflection signal with the second frequency parameter equal to the first frequency parameter, and transmit the millimeter wave reflection signal to the control unit 40. The control unit 40 is configured to obtain a second intensity parameter of the millimeter wave reflection signal according to the millimeter wave reflection signal, and obtain the humidity information of the environment according to the second intensity parameter and the first intensity parameter.
In this embodiment, the millimeter wave transmitting unit 10 may be a wave oscillator, i.e., a transmitting antenna. The millimeter wave receiving unit 20 may be a wave receiver, i.e., a receiving antenna. The filtering Unit 30 is a filter, and the control Unit 40 includes, but is not limited to, a Central Processing Unit (CPU), an embedded Microcontroller (MCU), an embedded Microprocessor (MPU), an embedded System on chip (SoC), and the like. And the related data is processed by the ARM processor and is transmitted to corresponding electronic equipment, such as air conditioners, humidifiers and the like.
The millimeter wave reflected signals with the second frequency parameter unequal to the first frequency parameter are filtered by the filtering unit 30, so as to obtain the millimeter wave reflected signals with the second frequency parameter equal to the first frequency parameter, and the millimeter wave reflected signals are transmitted to the control unit 40.
The control unit 40 obtains the second intensity parameter of the millimeter wave reflection signal according to the millimeter wave reflection signal&1And according to said second intensity parameter&1And the first intensity parameter&0And acquiring humidity information of the environment. During the travel of the waves, the millimeter waves are absorbed by water vapor in the environment. At this time, the wave intensity of the millimeter wave reflection signal has changed to the second wave intensity parameter&1. At this time, according to the first intensity parameter&0And the second intensity parameter&1The degree of millimeter waves absorbed by water vapor in the wave traveling process can be obtained, and therefore the humidity information of the environment can be obtained.
Therefore, the millimeter wave reflected signals with the second frequency parameter unequal to the first frequency parameter are filtered by the filtering unit 30 in the humidity detection system, so as to eliminate the interference caused by the moving object (with changed frequency) in the environment. At the same time, the first intensity parameter is determined by the control unit 40&0And the second intensity parameter&1The degree of millimeter waves absorbed by water vapor in the wave traveling process can be obtained, and the humidity information of the environment can be obtained. Therefore, the humidity detection system can timely react to the humidity change of the environment, and the detection is more accurate and the adjustment and control are easy to carry out by eliminating the interference and comparing the wave intensity.
In one embodiment, the control unit 40 includes an analog-to-digital conversion unit 410 and a main control unit 420. The analog-to-digital conversion unit 410 is configured to perform analog-to-digital conversion on the millimeter wave reflection signal to obtain the second intensity parameter of the millimeter wave reflection signal. The main control unit 420 is configured to obtain humidity information of the environment according to the second intensity parameter and the first intensity parameter.
In this embodiment, the analog-to-digital conversion unit 410 may be an analog-to-digital converter, which converts an analog quantity into a digital quantity. The analog-to-digital conversion process includes sampling, quantization, encoding, and the like. The main control unit 420 may be a micro control unit, which processes relevant parameters. Obtaining the second intensity parameter in a period through the analog-to-digital conversion unit 410 and the main control unit 420&1And is related to the first intensity parameter&0Comparing, calculating and obtaining the wave intensity average difference parameter&' the specific process can refer to the above embodiments.
In one embodiment, the master control unit 420 includes a wave intensity contrast module 421 and a master control reaction module 422. The intensity comparison module 421 is configured to calculate and obtain an intensity mean difference parameter according to the second intensity parameter and the first intensity parameter, and compare the intensity mean difference parameter with the first intensity parameter. The main control reaction module 422 is configured to obtain wave intensity contrast information between the wave intensity mean difference parameter and the first wave intensity parameter, and obtain humidity information of the environment according to the wave intensity contrast information.
In this embodiment, the intensity contrast module 421 and the main control reaction module 422 include, but are not limited to, a central processing unit, an embedded microcontroller, an embedded microprocessor, an embedded system on a chip, and the like.
The intensity comparison module 421 is configured to calculate and obtain an intensity mean difference parameter according to the second intensity parameter and the first intensity parameter, compare the intensity mean difference parameter with the first intensity parameter, and transmit comparison information to the main control reaction module 422. The specific process can refer to the above embodiments.
The main control reaction module 422 is configured to obtain wave intensity contrast information between the wave intensity mean difference parameter and the first wave intensity parameter, and obtain humidity information of the environment according to the wave intensity contrast information. The specific process of the comparison process between the wave intensity average difference parameter and the first wave intensity parameter and the humidity information of the environment may refer to the above embodiments.
In one embodiment, the master control unit 420 also includes an environmental device control module 423. The environmental device control module 423 is configured to regulate and control the environmental device according to the humidity information.
In this embodiment, the environmental device control module 423 includes, but is not limited to, a central processing unit, an embedded microcontroller, an embedded microprocessor, an embedded system on a chip, and the like. The environmental equipment can be some electronic equipment, such as an air conditioner, a humidifier and the like.
Control instructions may be issued to the environmental devices by the environmental device control module 423. Taking an indoor air conditioner as an example, the following steps are included: closing the dehumidification function of the air conditioner, maintaining the dehumidification function of the air conditioner, increasing the dehumidification strength of the air conditioner, and the like. At this time, the environmental device control module 423 may enable the humidity detection system to perform interactive control with the environmental device (such as an air conditioner, a humidifier, etc.). Therefore, the humidity detection system can timely react to the humidity change of the environment, and the detection is more accurate and the adjustment and control are easy to carry out by eliminating the interference and comparing the wave intensity.
In one embodiment, the present application provides an electronic device. The electronic device comprises the humidity detection system of any one of the above embodiments.
In this embodiment, the electronic device may be an air conditioner, a humidifier, or the like. The humidity detection system is applied to the electronic equipment to automatically adjust the humidification strength. And when the electronic equipment is started to operate, the humidity detection system is started simultaneously so as to realize real-time humidity detection. At this moment, the electronic device can timely respond to the detection result of the humidity detection system for adjustment.
Referring to fig. 7, in an embodiment, the millimeter wave transmitting unit 10 and the millimeter wave receiving unit20 are integrated to form a waveform oscillation and receiver. The waveform oscillation and receiver transmits fixed-frequency waveforms to the periphery, receives the reflected waveforms and transmits the reflected waveforms to the main control board. The filtering unit 30, the analog-to-digital conversion unit 410, and the main control unit 420 are integrally configured to form a main control board, perform analog-to-digital conversion and frequency comparison of received waveforms, thereby eliminating interference waves and obtaining the second intensity parameter&1Calculating the wave intensity mean difference parameter&', and said first intensity parameter&0And comparing and judging the humidity, and finally controlling the air conditioner to dehumidify.
The main control board of the humidity detection system is electrically connected with the control main board of the electronic equipment so as to realize interactive control with the electronic equipment. Specifically, the humidity detection system can be installed in the electronic device, can timely respond to the humidity change of the environment, is convenient to move, and is more convenient to use.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A humidity detection method, comprising:
transmitting a millimeter wave signal to an environment, and acquiring a first frequency parameter and a first wave intensity parameter of the millimeter wave signal;
forming a millimeter wave reflection signal by the reflection of a detection object in the environment, acquiring the millimeter wave reflection signal, and acquiring a second frequency parameter of the millimeter wave reflection signal;
judging whether the second frequency parameter is equal to the first frequency parameter;
if the second frequency parameter is equal to the first frequency parameter, acquiring a second intensity parameter of the millimeter wave reflected signal;
and acquiring the humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter.
2. A humidity sensing method as set forth in claim 1, further comprising:
and if the second frequency parameter is not equal to the first frequency parameter, discarding the millimeter wave reflection signal.
3. A humidity detection method as claimed in claim 1, wherein obtaining humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter comprises:
in a period, calculating and obtaining a wave intensity mean difference parameter according to the second wave intensity parameter and the first wave intensity parameter;
and comparing the wave intensity mean difference parameter with the first wave intensity parameter to acquire the humidity information of the environment.
4. A humidity detecting method according to claim 3, wherein obtaining humidity information of the environment by comparing the wave strength mean-difference parameter with the first wave strength parameter comprises:
if the wave intensity mean difference parameter is equal to the first wave intensity parameter, the environment does not need to be dehumidified;
if the wave intensity mean difference parameter is smaller than the first wave intensity parameter, dehumidifying the environment;
and if the wave intensity mean difference parameter is less than one half of the first wave intensity parameter, enhancing the dehumidification of the environment.
5. The humidity detection method according to claim 4, wherein the humidity detection method is applied to an air conditioning device, and the obtaining of the humidity information of the environment according to the comparison between the wave intensity mean difference parameter and the first wave intensity parameter comprises:
if the wave intensity mean difference parameter is equal to the first wave intensity parameter, closing the dehumidification function of the air conditioning equipment;
if the wave intensity average difference parameter is smaller than the first wave intensity parameter, maintaining the dehumidification function of the air conditioning equipment;
and if the wave intensity average difference parameter is less than one half of the first wave intensity parameter, increasing the dehumidification intensity of the air conditioning equipment.
6. A humidity detecting method as claimed in claim 1, wherein if said second frequency parameter is equal to said first frequency parameter, then obtaining a second intensity parameter of said millimeter wave reflected signal comprises:
and if the second frequency parameter is the same as the first frequency parameter, performing analog-to-digital conversion on the millimeter wave reflection signal to obtain the second intensity parameter of the millimeter wave reflection signal.
7. A humidity detection method as claimed in claim 1, wherein after acquiring the humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter, the millimeter wave signal is continuously transmitted to the environment for real-time humidity detection.
8. A wetness detecting system, comprising:
the millimeter wave transmitting unit (10) is used for transmitting a millimeter wave signal to the environment and acquiring a first frequency parameter and a first wave intensity parameter of the millimeter wave signal;
the millimeter wave receiving unit (20) is used for receiving the millimeter wave reflection signal and acquiring a second frequency parameter of the millimeter wave reflection signal;
the filtering unit (30) is used for acquiring the millimeter wave reflection signal with the second frequency parameter equal to the first frequency parameter and transmitting the millimeter wave reflection signal to the control unit (40);
the control unit (40) is configured to obtain a second intensity parameter of the millimeter wave reflection signal according to the millimeter wave reflection signal, and obtain humidity information of the environment according to the second intensity parameter and the first intensity parameter.
9. A wetness detecting system as claimed in claim 8, wherein said control unit (40) comprises:
an analog-to-digital conversion unit (410) for performing analog-to-digital conversion on the millimeter wave reflection signal to obtain the second intensity parameter of the millimeter wave reflection signal;
and the main control unit (420) is used for acquiring the humidity information of the environment according to the second wave intensity parameter and the first wave intensity parameter.
10. A moisture detection system according to claim 9, wherein said main control unit (420) comprises:
a wave intensity comparison module (421) configured to calculate a wave intensity mean difference parameter according to the second wave intensity parameter and the first wave intensity parameter, and compare the wave intensity mean difference parameter with the first wave intensity parameter;
and the main control reaction module (422) is used for acquiring wave intensity contrast information of the wave intensity mean difference parameter and the first wave intensity parameter and acquiring humidity information of the environment according to the wave intensity contrast information.
11. A wetness detecting system as in claim 10, wherein said main control unit (420) further comprises:
and the environmental equipment control module (423) is used for regulating and controlling the environmental equipment according to the humidity information.
12. An electronic device, characterized in that it comprises a humidity detection system according to any of claims 8-11.
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| JP2008096287A (en) * | 2006-10-12 | 2008-04-24 | Nobuyuki Suzuki | Wireless type soil humidity measurement instrument and automatic water supply device for plants |
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Application publication date: 20200612 |