CN113992983A - Television control method and device, smart television and computer readable storage medium - Google Patents
Television control method and device, smart television and computer readable storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44213—Monitoring of end-user related data
- H04N21/44218—Detecting physical presence or behaviour of the user, e.g. using sensors to detect if the user is leaving the room or changes his face expression during a TV program
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4436—Power management, e.g. shutting down unused components of the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/488—Data services, e.g. news ticker
- H04N21/4882—Data services, e.g. news ticker for displaying messages, e.g. warnings, reminders
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Abstract
The invention discloses a television control method, a television control device, an intelligent television and a computer readable storage medium, wherein the television control method comprises the following steps: acquiring radar information based on a radar set in association with the television; calculating and acquiring the actual distance between the target object and the television screen based on the radar information; and when the actual distance is smaller than a preset distance threshold value, controlling the television screen to stop displaying the television program. Compared with the prior art, in the scheme of the invention, the radar information can be acquired through the radar which is set in association with the television, so that the actual distance between the target object (namely the user) and the television screen can be acquired, and when the actual distance is smaller than the preset distance threshold value, namely the user is too close to the television screen, the television screen is automatically and intelligently controlled to stop displaying the television program, so that the user is prevented from continuously watching the television too close, the intelligent control on the television is facilitated, and the health of the user is protected.
Description
Technical Field
The invention relates to the technical field of intelligent control, in particular to a television control method and device, an intelligent television and a computer readable storage medium.
Background
With the development of science and technology, display devices such as televisions and the like are also rapidly developed and widely applied, at present, electronic products such as televisions and the like with electronic screens become an indispensable part of daily life gradually, and the use frequency and the use duration of the televisions are continuously increased. However, long-time watching of television at close range has a great influence on the health (e.g., eyesight health) of the user.
In the prior art, television control can only be achieved by a user through the use of a remote controller. The problem in the prior art is that it is difficult for users (especially children) to perceive that the distance between the users and the television screen is too close, and therefore, it is difficult to realize intelligent control on the television when the distance is too close. That is, the prior art is not favorable for carrying out intelligent control on the television and protecting the health of the user.
Thus, there is still a need for improvement and development of the prior art.
Disclosure of Invention
The invention mainly aims to provide a television control method and device, an intelligent television and a computer readable storage medium, and aims to solve the problems that in the prior art, a scheme that only a user can realize television control by using a remote controller is not beneficial to intelligent control of the television and protection of the health of the user.
In order to achieve the above object, a first aspect of the present invention provides a television control method, wherein the method includes:
acquiring radar information based on a radar set in association with the television;
calculating and acquiring the actual distance between the target object and the television screen based on the radar information;
and when the actual distance is smaller than a preset distance threshold value, controlling the television screen to stop displaying the television program.
Optionally, the radar is a microwave radar chip, and the microwave radar chip is disposed inside the television.
Optionally, the calculating the actual distance between the target object and the tv screen based on the radar information includes:
calculating the average value of all the target time difference values;
and calculating and acquiring the actual distance between the target object and the television screen based on the calculated average value and the preset propagation rate.
Optionally, after the controlling the television screen to stop displaying the television program when the actual distance is smaller than the preset distance threshold, the method further includes:
and controlling the television to send an alarm signal to prompt the target object to keep a safe distance.
Optionally, after the radar information is acquired based on the radar set in association with the television, the method further includes:
calculating and acquiring thoracic cavity displacement change information of the target object based on the radar information;
identifying and acquiring the respiratory state and the heartbeat frequency of the target object based on the thoracic cavity displacement change information;
identifying a sleep state of the target subject based on the thoracic displacement variation information, the respiration state, and the heartbeat frequency;
and when the target object is in a sleep state, controlling the television to stop playing the television program.
Optionally, after the radar information is acquired based on the radar set in association with the television, the method further includes:
when the target object is determined to move to the preset area range in front of the television based on the radar information, controlling the television screen to light;
and controlling the television screen to be closed when the target object is not detected in the preset area range within a preset time length.
Optionally, after the radar information is acquired based on the radar set in association with the television, the method further includes:
acquiring gesture information of a target object based on the radar information;
acquiring a control instruction based on the gesture information;
and controlling the television based on the control instruction.
A second aspect of the present invention provides a television control apparatus, wherein the apparatus comprises:
the system comprises a radar information acquisition module, a television acquisition module and a display module, wherein the radar information acquisition module is used for acquiring radar information based on a radar which is set in association with the television;
the actual distance acquisition module is used for calculating and acquiring the actual distance between the target object and the television screen based on the radar information;
and the control module is used for controlling the television screen to stop displaying the television programs when the actual distance is smaller than a preset distance threshold value.
A third aspect of the present invention provides a smart tv, where the smart tv includes:
the microwave radar module, the calculation module and the television control module are sequentially in communication connection;
the microwave radar module is arranged at a non-metal part in the smart television and used for acquiring radar information and sending the radar information to the calculation module;
the calculation module is used for calculating and acquiring the actual distance between a target object and a television screen based on the radar information and sending the actual distance to the television control module;
the television control module is used for controlling the television screen to stop displaying the television programs when the actual distance is smaller than a preset distance threshold.
A fourth aspect of the present invention provides a computer-readable storage medium, in which a television control program is stored, and the television control program, when executed by a processor, implements any one of the steps of the television control method.
According to the scheme, the radar information is obtained based on the radar which is set in association with the television; calculating and acquiring the actual distance between the target object and the television screen based on the radar information; and when the actual distance is smaller than a preset distance threshold value, controlling the television screen to stop displaying the television program. Compared with the scheme that the television control can only be actively realized by the user through the remote controller in the prior art, in the scheme of the invention, the radar information can be obtained through the radar which is arranged in association with the television, so that the actual distance between the target object (namely the user) and the television screen can be obtained, and when the actual distance is smaller than a preset distance threshold value, namely the user is too close to the television screen, the television screen is automatically and intelligently controlled to stop displaying the television program, so that the user is prevented from continuously watching the television too close, the intelligent control on the television is facilitated, and the health of the user is protected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flowchart of a television control method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a microwave radar chip according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a detailed process of step S200 in FIG. 1 according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of measuring the azimuth of a target object based on a microwave radar according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of another television control method according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of another television control method according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating another television control method according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a television control apparatus according to an embodiment of the present invention;
fig. 9 is a schematic block diagram of an intelligent television according to an embodiment of the present invention;
fig. 10 is a specific system block diagram of an intelligent television according to an embodiment of the present invention;
fig. 11 is a schematic diagram of a specific working flow of the smart television shown in fig. 10 according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when …" or "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted depending on the context to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
With the development of science and technology, display devices (such as projectors, displays and the like) such as televisions are also rapidly developed and widely applied, at present, electronic products with electronic screens such as televisions gradually become an indispensable part of daily life, and the use frequency and the use duration of the televisions are continuously increased. However, long-time watching of television at close range has a great influence on the health (e.g., eyesight health) of the user.
In the prior art, the control of the television can only be realized by a user through using a remote controller, and the control of the television is inconvenient and not intelligent. The problem in the prior art is that it is difficult for users (especially children) to perceive that the distance between the users and the television screen is too close, and therefore, it is difficult to realize intelligent control on the television when the distance is too close. The prior art is unfavorable for carrying out intelligent control to the TV promptly, and inconvenient user uses is unfavorable for protecting user's health, has influenced user's use and has experienced.
In order to solve the problems in the prior art, in the scheme of the invention, radar information is obtained based on a radar which is set in association with a television; calculating and acquiring the actual distance between the target object and the television screen based on the radar information; and when the actual distance is smaller than a preset distance threshold value, controlling the television screen to stop displaying the television program. Compared with the scheme that the television control can only be actively realized by the user through the remote controller in the prior art, in the scheme of the invention, the radar information can be obtained through the radar which is arranged in association with the television, so that the actual distance between the target object (namely the user) and the television screen can be obtained, and when the actual distance is smaller than the preset distance threshold value, namely the user is too close to the television screen, the television screen is automatically and intelligently controlled to stop displaying the television program, so that the user is prevented from continuously watching the television too close, the intelligent control on the television is facilitated, the health of the user is facilitated to be protected, and the use experience of the user is improved.
Exemplary method
As shown in fig. 1, an embodiment of the present invention provides a television control method, and specifically, the method includes the following steps:
and step S100, radar information is obtained based on the radar which is set in association with the television.
The association is arranged in, above or at other positions close to the television and is in communication connection with the television. In an embodiment, the radar may also be a component module inside a television, and is not limited herein. In this embodiment, the radar transmits microwaves to a target area (i.e., an area facing a television) as a transmitted wave, receives a reflected wave reflected by an obstacle, and obtains corresponding radar information based on the transmitted wave and the reflected wave. Specifically, the radar information may include one or more of a time difference between a transmitted wave and a reflected wave, a frequency of the reflected wave, a doppler shift, and a phase difference of the reflected wave, and may further include other information, which is not particularly limited herein.
And step S200, calculating and acquiring the actual distance between the target object and the television screen based on the radar information.
Wherein the target object is a person in front of a television screen. Specifically, a stationary target and a moving target can be distinguished through movement detection and respiration monitoring based on the microwave radar technology, and the shape and the size of the target can be identified through RSC (radar scattering cross section), namely, a measurement value of radar signals reflected by the target in the radar receiving direction, so that human and non-human targets can be distinguished. And calculating to obtain the actual distance between the target object and the television screen based on the radar information and the preset electromagnetic wave propagation rate.
In an application scenario, the target object can also be a child user who recognizes the shape and size of the person, so that eyesight protection can be performed on the child user, at the moment, the television can start the child protection mode, and when the child protection mode is started, intelligent control is performed when the child user is detected to be too close to the distance.
And step S300, when the actual distance is smaller than a preset distance threshold, controlling the television screen to stop displaying the television program.
Specifically, the preset distance threshold is a preset minimum distance to be kept when the user watches the television, when the actual distance is smaller than the preset distance threshold, the distance is too short, the actual distance does not meet the requirement of eyesight protection, and the television screen can be controlled to stop displaying the television program at the moment so as to protect the eyesight health of the user in time. The preset distance threshold may be set and adjusted according to actual requirements, for example, the preset distance threshold may be set to be 2 meters in this embodiment, but is not limited to this.
As can be seen from the above, in the television control method provided in the embodiment of the present invention, radar information is obtained based on a radar set in association with a television; calculating and acquiring the actual distance between the target object and the television screen based on the radar information; and when the actual distance is smaller than a preset distance threshold value, controlling the television screen to stop displaying the television program. Compared with the scheme that the television control can only be actively realized by the user through the remote controller in the prior art, in the scheme of the invention, the radar information can be obtained through the radar which is arranged in association with the television, so that the actual distance between the target object (namely the user) and the television screen can be obtained, and when the actual distance is smaller than a preset distance threshold value, namely the user is too close to the television screen, the television screen is automatically and intelligently controlled to stop displaying the television program, so that the user is prevented from continuously watching the television too close, the intelligent control on the television is facilitated, and the health of the user is protected.
In this embodiment, the radar is a microwave radar chip, and the microwave radar chip is disposed inside the television.
At present, the radar is mainly applied to the fields of automotive electronics, geological survey, industrial control and the like, and is not applied to a television. As microwave radar technology develops and matures, the frequency band of microwave use is also continuously extended to high frequency. The microwave frequency (300MHz-300GHz) is higher than the general radio frequency, and the microwave antenna has the characteristics of high directionality, easy clustering, good maneuverability, large working bandwidth and the like, and the microwave can directly penetrate through non-metal materials such as plastics, glass and the like. In this embodiment, the microwave radar chip is used, and more accurate positioning and detection of the personnel are realized by utilizing the characteristics of directionality, easiness in clustering into bundles, good maneuverability, enough working bandwidth and the like. And the radar chip is combined with the television, so that the television can be intelligently controlled, and the television has more intelligent functions. For example, distance detection: the mode of the television for children is realized, and the children are prevented from watching the television in a super-close distance; monitoring respiration: intelligently identifying a respiratory state, and monitoring the state of a person in front of the machine or the sleep quality; movement detection: the activity of personnel in front of the machine is detected, and intelligent screen opening and closing can be realized; gesture recognition: and the television is controlled at intervals, and the functions of writing at intervals or turning pages at intervals are realized.
Specifically, in this embodiment, the microwave radar chip is disposed at a non-metal portion inside the television, such as a plastic lower front shell, so as to avoid the influence of a metal portion (such as a metal back plate) of the television on the transmission and reception of the microwave signal.
Fig. 2 is a schematic diagram of a microwave radar chip according to an embodiment of the present invention, and specifically, as shown in fig. 2, the microwave radar chip operates according to a principle that a phase-locked loop inside the chip generates a microwave signal, and the microwave signal is amplified by a power amplifier and then passes through a power amplifierThe microwave signal is emitted by the antenna, the microwave signal is reflected when meeting an obstacle in the transmission process, and a certain frequency difference, namely Doppler effect, is generated between the reflected microwave signal and the emitted microwave signal in the movement process of the obstacle, so that corresponding radar information is obtained. In the microwave radar chip provided by this embodiment, the mixer may process the reflected and transmitted microwave signals to obtain intermediate frequency signals, the central processing unit may analyze and process the intermediate frequency signals to calculate effective information such as speed and distance of an obstacle, or may model and identify effective information such as gesture, motion and shape through a chip algorithm, and the effective information may be converted into GPIO or I through the central processing unit2C, etc., with an external device, such as a device for controlling a television set or a control unit of a television set. Wherein, GPIO output refers to output high-low level signal, I2C refers to a serial communication bus. In an application scenario, the corresponding valid information (e.g., actual distance) may also be calculated based on radar information by other devices or modules external to the chip, and is not limited herein. In this embodiment, distance measurement, speed measurement and lateral direction can be realized based on the radar information acquired by the microwave radar chip, that is, the distance is calculated through the time difference between microwave transmission and reception, the velocity is calculated through the doppler shift between microwave transmission and reception, and the azimuth is measured through directional transmission of antenna beams.
Specifically, in this embodiment, the radar information includes a plurality of target time difference values, each of the target time difference values is a time difference value of a set of corresponding transmitted waves and reflected waves, as shown in fig. 3, the step S200 includes:
step S201, calculating a mean value of all the above target time difference values.
Step S202, calculating and obtaining an actual distance between the target object and the tv screen based on the calculated mean value and a preset propagation rate.
Specifically, in this embodiment, the actual distance is calculated based on the average value of the time difference values of the multiple targets, so that the calculation accuracy can be improved. The preset propagation rate is the propagation rate of the preset electromagnetic wave in the current region, and the method is used for solving the problem that the propagation rate of the preset electromagnetic wave in the current region is lowExample is 3x108m/s。
Specifically, for a static target object, the distance calculation formula is shown in the following formula (1):
where D is the actual distance obtained by calculation, c is the electromagnetic wave propagation rate, and Δ t1, Δ t2 to Δ tn respectively represent the time difference between the transmitted wave and the reflected wave of the 1 st group, the 2 nd group to the nth group of microwaves. In order to improve the calculation precision, the microwave radar can take multiple groups of data instantly, and the average value of the data is taken to calculate the distance between the radar and the obstacle target, so that whether the target object is too close or not is judged.
For a target at a short distance or in a moving state, measuring the time difference between the transmitted and received reflected waves, wherein the error is large, the time difference can be obtained by measuring the frequency difference, a Doppler related concept is introduced, and the calculation formula of the reflected waves is shown in the following formula (2):
thus, the doppler shift formula can be obtained as shown in the following formula (3):
the velocity formula of the target object can thus be obtained as shown in the following equation (4):
wherein f is0Denotes the emission frequency, f 'of the radar wave'0Indicating the frequency, V, of the reflected waverRepresenting the velocity of the target object, i.e. the radial velocity of the moving target, c representing the propagation velocity of the electromagnetic wave in space, fdRepresenting the Doppler frequencyAnd (6) moving.
Fig. 4 is a schematic diagram of measuring the azimuth of a target object based on a microwave radar according to an embodiment of the present invention, where the microwave radar measures the azimuth (direction finding) of the target object by analyzing the phase difference of a target reflected wave through a millimeter wave radar parallel receiving antenna, so as to calculate the azimuth of the monitored target, specifically, as shown in the following formulas (5) and (6):
where θ is the azimuth angle, D1 and D2 are the distances of the target object from the antennas RX1 and RX2, respectively, λ is the transmitted microwave wavelength, and D is the distance between the antennas RX1 and RX 2. The distance, speed and azimuth angle obtained according to the formula are important parameters for realizing the functions of television distance detection, respiration monitoring, movement detection, gesture recognition and the like.
Specifically, in this embodiment, the microwave radar chip may be preset above or below the corresponding position of the television screen (on the same vertical plane as the television screen), or the distance between the microwave radar chip and the television screen may be obtained in advance, so that the distance between the television screen and the target object may be obtained according to the distance between the radar and the target object.
Further, after the step S300, the method further includes: and controlling the television to send an alarm signal to prompt the target object to keep a safe distance. In this embodiment, the safe distance may be set to be equal to the preset distance threshold.
In one application scenario, the television may be set to a child mode, in which the distance monitoring and television control are performed. Further, to prevent the child mode from being triggered by mistake, a delay judgment may be performed, for example, when it is detected that the actual distance is smaller than the preset distance threshold and the duration exceeds a preset time (e.g., 2 minutes), the television screen is controlled to stop displaying the television program, and the user is prompted to keep a safe distance by a pop-up window or voice broadcast.
Specifically, in this embodiment, as shown in fig. 5, after step S100, the method further includes:
and step A200, calculating and acquiring the thoracic cavity displacement change information of the target object based on the radar information.
And step A300, identifying and acquiring the respiratory state and the heartbeat frequency of the target object based on the thoracic cavity displacement change information.
Step a400, identifying a sleep state of the target subject based on the thoracic displacement variation information, the respiratory state, and the heartbeat frequency.
Step a500, when the target object is in a sleep state, controlling the television to stop playing the television program.
Specifically, in this embodiment, the transmission wave of the microwave radar chip may be controlled, and when the thoracic displacement change information needs to be measured, the microwave radar chip may be controlled to transmit frequency hopping continuous waves (i.e., FMCW). At the moment, the radar wave is a high-frequency continuous wave, the frequency of the radar wave changes along with the time according to the rule of a triangular wave, the frequency change of the received echo wave is the same as that of the transmitted wave, only one time difference exists, the more accurate distance can be calculated by utilizing the small time difference, and the small amplitude of the fluctuation of the thoracic cavity can be identified. The displacement parameters and the frequency parameters of the heartbeat and the respiration of the target object are obtained in advance, for example, the displacement parameters and the frequency parameters of the heartbeat and the respiration of a part of an ordinary adult obtained in the embodiment are shown in the following table:
| frequency of | Displacement (front) | Displacement (Back) | |
| Breathing | 0.1-0.5HZ | 1-12mm | 0.1-0.5mm |
| Heartbeat | 0.8-2.0HZ | 0.1-0.5mm | 0.01-0.2mm |
The specific parameters may be set and adjusted according to actual requirements, and are not specifically limited herein. In this embodiment, the displacement change Δ R caused by the heart beating or the chest fluctuation of the target object is calculated based on the following formula (7):
wherein,
for phase change, λ is the microwave wavelength. Specifically, after the displacement change is calculated, the breathing state and the heartbeat frequency of the user can be obtained according to a preset parameter list. Therefore, whether the target object enters the sleep state or not can be judged, and when the target object enters the sleep state, the television is controlled to stop playing programs, so that the user is prevented from being disturbed, and meanwhile, the electric energy is saved. In an application scenario, when the user does not move greatly for a long time before the television, for example, the displacement of the chest cavity does not exceed 5cm in 30 minutes, and the respiration and heartbeat change steadily, the eyes can be preliminarily judgedThe subject enters a sleep state. If a large-amplitude action or heartbeat frequency change happens occasionally in the sleep state and exceeds the range of heartbeats and respiratory frequency of an adult, the sleep quality, the duration of deep sleep and light sleep can be analyzed in detail according to the number of times of drastic change of the large-amplitude action and heartbeat respiration, and the user experience is improved.
Specifically, in this embodiment, as shown in fig. 6, after step S100, the method further includes:
and step B200, controlling the television screen to be lightened when the target object is determined to move to the preset area range in front of the television based on the radar information.
And step B300, controlling the television screen to be closed when the target object is not detected in the preset area range within a preset time length.
The preset range area is a preset range, when a user passes through the preset range, the television can be controlled to be on, the user can use the television conveniently, and otherwise, when the user leaves the preset range for a certain time (preset time length, such as 10 minutes), the television screen can be controlled to be off (or the television can be directly controlled to be off), so that the electric energy is saved.
Specifically, the microwave radar echo signal is correspondingly calculated through the chip, so that whether personnel exist in front of the television, the position of the personnel, whether the personnel are in a moving state and the moving speed V can be directly judgedr. Therefore, the intelligent screen switching can be carried out, for example, when the absence time in the front range of the television is detected to exceed 10 minutes, the television is controlled to enter the standby mode.
Specifically, in this embodiment, as shown in fig. 7, after step S100, the method further includes:
and C200, acquiring gesture information of the target object based on the radar information.
And C300, acquiring a control instruction based on the gesture information.
And C400, controlling the television based on the control command.
In an application scenario, the gesture information may be a specific gesture obtained by matching from a preset gesture library, and a corresponding control instruction is obtained by matching from a preset instruction library according to the gesture, so that the television is controlled.
In this embodiment, the gesture information is parameter information in a gesture change process obtained based on radar information. The gesture recognition mainly comprises gesture actions of rotating, swinging hands up and down, left and right, rubbing fingers and the like, and the television can be operated in the air. In an application scenario, after a signal corresponding to gesture information is obtained, fast Fourier transform is carried out, then a peak search algorithm and a constant false alarm algorithm are used for screening to obtain an azimuth angle, then feature comparison is carried out through an existing gesture modeling library, actual actions are judged and obtained, and then corresponding control instructions are obtained, so that a television can make corresponding action responses.
Optionally, the television control method may be executed by a single device or apparatus, or may be directly executed by a main control unit of a television, which is not specifically limited herein. Meanwhile, the television control method may also be applied to control of other display devices similar to a television, such as a projector, a display, and the like, and is not particularly limited herein.
Exemplary device
As shown in fig. 8, corresponding to the television control method, an embodiment of the present invention further provides a television control apparatus, where the television control apparatus includes:
and a radar information obtaining module 610, configured to obtain radar information based on a radar set in association with the television.
The association is arranged in, above or at other positions close to the television and is in communication connection with the television. In an embodiment, the radar may also be a component module inside a television, and is not limited herein. In this embodiment, the radar transmits microwaves to a target area (i.e., an area facing a television) as a transmitted wave, receives a reflected wave reflected by an obstacle, and obtains corresponding radar information based on the transmitted wave and the reflected wave. Specifically, the radar information may include one or more of a time difference between a transmitted wave and a reflected wave, a frequency of the reflected wave, a doppler shift, and a phase difference of the reflected wave, and may further include other information, which is not particularly limited herein.
And an actual distance obtaining module 620, configured to calculate and obtain an actual distance between the target object and the television screen based on the radar information.
Wherein the target object is a person in front of a television screen. Specifically, a stationary target and a moving target can be distinguished through movement detection and respiration monitoring based on the microwave radar technology, and the shape and the size of the target can be identified through RSC (radar scattering cross section), namely, a measurement value of radar signals reflected by the target in the radar receiving direction, so that human and non-human targets can be distinguished. And calculating to obtain the actual distance between the target object and the television screen based on the radar information and the preset electromagnetic wave propagation rate.
In an application scenario, the target object can also be a child user who recognizes the shape and size of the person, so that eyesight protection can be performed on the child user, at the moment, the television can start the child protection mode, and when the child protection mode is started, intelligent control is performed when the child user is detected to be too close to the distance.
The control module 630 is configured to control the television screen to stop displaying the television program when the actual distance is smaller than a preset distance threshold.
Specifically, the preset distance threshold is a preset minimum distance to be kept when the user watches the television, when the actual distance is smaller than the preset distance threshold, the distance is too short, the actual distance does not meet the requirement of eyesight protection, and the television screen can be controlled to stop displaying the television program at the moment so as to protect the eyesight health of the user in time. The preset distance threshold may be set and adjusted according to actual requirements, for example, the preset distance threshold may be set to be 2 meters in this embodiment, but is not limited to this.
As can be seen from the above, in the television control apparatus provided in the embodiment of the present invention, the radar information acquisition module 610 acquires radar information based on a radar set in association with a television; calculating and acquiring the actual distance between the target object and the television screen based on the radar information through an actual distance acquisition module 620; when the actual distance is smaller than the preset distance threshold, the control module 630 controls the television screen to stop displaying the television program. Compared with the scheme that the television control can only be actively realized by the user through the remote controller in the prior art, in the scheme of the invention, the radar information can be obtained through the radar which is arranged in association with the television, so that the actual distance between the target object (namely the user) and the television screen can be obtained, and when the actual distance is smaller than a preset distance threshold value, namely the user is too close to the television screen, the television screen is automatically and intelligently controlled to stop displaying the television program, so that the user is prevented from continuously watching the television too close, the intelligent control on the television is facilitated, and the health of the user is protected.
Specifically, in this embodiment, the specific functions of the television control apparatus and the modules thereof may refer to the corresponding descriptions in the television control method, and are not described herein again.
Based on the foregoing embodiment, the present invention further provides a smart television, and fig. 9 is a schematic block diagram of the smart television provided in the embodiment of the present invention, as shown in fig. 9, the smart television includes: the microwave radar module 710, the calculation module 720 and the television control module 730 are sequentially in communication connection; the microwave radar module 710 is disposed at a non-metal portion in the smart television, and configured to acquire radar information and send the radar information to the calculation module 720; the calculating module 720 is configured to calculate and obtain an actual distance between a target object and a television screen based on the radar information, and send the actual distance to the television control module 730; the tv control module 730 is configured to control the tv screen to stop displaying tv programs when the actual distance is smaller than a preset distance threshold.
In an application scenario, the microwave radar module 710 may further be in communication connection with the television control module 730, so as to control the emission state of the microwave radar module 710 through the television control module 730, thereby implementing better monitoring of the state of the target object.
It should be noted that the smart television may further include other modules for implementing specific functions of the television, and is not limited in particular herein. The specific functions of the smart television and the modules thereof may refer to the corresponding descriptions in the television control method, and are not described herein again. The intelligent television provided by the embodiment can realize automatic intelligent control, avoid the situation that a user watches the television too close continuously, and is beneficial to protecting the health of the user.
Fig. 10 is a specific system block diagram of an intelligent television according to an embodiment of the present invention, specifically, the microwave radar module 710 is the radar module in fig. 10, and the functions corresponding to the calculation module 720 and the television control module 730 may be completed by a main control chip of the intelligent television in fig. 10. Fig. 11 is a schematic diagram of a specific working flow of the smart television shown in fig. 10 according to an embodiment of the present invention, as shown in fig. 11, an antenna transmits/receives a microwave signal, a radar chip performs sampling analysis on an echo signal, and then converts the analysis data into SPI data to be transmitted to a main control chip of the television, and the main control chip of the television analyzes corresponding data, thereby implementing functions such as distance detection, respiration monitoring, motion detection, gesture recognition, and controlling a playing condition, a switching state, and the like of the television according to a corresponding result. Thereby combine AI smart television and microwave radar technique, integrated microwave radar module (microwave radar chip) on traditional smart television basis, carry out corresponding processing output effective information to the TV set master control to transmission and reflection microwave signal through the microwave radar chip, TV set master control analysis microwave radar module gathers effective information, make the TV set possess the distance detection, breathe the monitoring, move and listen and gesture recognition isodifferentiation function, give more intelligent functions of TV, further promote user experience, promote TV science and technology sense and practicality.
The embodiment of the present invention further provides a computer-readable storage medium, where a television control program is stored on the computer-readable storage medium, and when the television control program is executed by a processor, the steps of any one of the television control methods provided in the embodiment of the present invention are implemented.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to implement all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art would appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the above modules or units is only one logical division, and the actual implementation may be implemented by another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
The integrated modules/units described above, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium and can implement the steps of the embodiments of the method when the computer program is executed by a processor. The computer program includes computer program code, and the computer program code may be in a source code form, an object code form, an executable file or some intermediate form. The computer readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signal, telecommunication signal, software distribution medium, etc. It should be noted that the contents contained in the computer-readable storage medium can be increased or decreased as required by legislation and patent practice in the jurisdiction.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (10)
1. A television control method, the method comprising:
acquiring radar information based on a radar set in association with the television;
calculating and acquiring the actual distance between the target object and the television screen based on the radar information;
and when the actual distance is smaller than a preset distance threshold value, controlling the television screen to stop displaying the television program.
2. The method according to claim 1, wherein the radar is a microwave radar chip, and the microwave radar chip is disposed inside the television.
3. The television control method according to claim 1, wherein the radar information includes a plurality of target time difference values, each of the target time difference values being a time difference value of a corresponding set of a transmitted wave and a reflected wave, and the calculating of the actual distance to the television screen from the target object based on the radar information includes:
calculating the mean value of all the target time difference values;
and calculating and acquiring the actual distance between the target object and the television screen based on the calculated mean value and the preset propagation rate.
4. The television control method of claim 1, wherein after the controlling the television screen to stop displaying the television program when the actual distance is less than a preset distance threshold, the method further comprises:
and controlling the television to send an alarm signal to prompt the target object to keep a safe distance.
5. The television control method according to claim 1, wherein after the radar information is acquired based on the radar set in association with the television, the method further comprises:
calculating and acquiring thoracic cavity displacement change information of the target object based on the radar information;
identifying and acquiring the respiratory state and the heartbeat frequency of the target object based on the thoracic cavity displacement change information;
identifying a sleep state of the target subject based on the chest displacement change information, the respiratory state, and the heartbeat frequency;
and when the target object is in a sleep state, controlling the television to stop playing the television program.
6. The television control method according to claim 1, wherein after the radar information is acquired based on the radar set in association with the television, the method further comprises:
when it is determined that the target object moves to the preset area range in front of the television based on the radar information, controlling the television screen to light up;
and controlling the television screen to be closed when the target object is not detected in the preset area range within the preset time length.
7. The television control method according to claim 1, wherein after the radar information is acquired based on the radar set in association with the television, the method further comprises:
acquiring gesture information of a target object based on the radar information;
acquiring a control instruction based on the gesture information;
and controlling the television based on the control instruction.
8. A television control apparatus, the apparatus comprising:
the system comprises a radar information acquisition module, a television acquisition module and a display module, wherein the radar information acquisition module is used for acquiring radar information based on a radar which is set in association with the television;
the actual distance acquisition module is used for calculating and acquiring the actual distance between the target object and the television screen based on the radar information;
and the control module is used for controlling the television screen to stop displaying the television programs when the actual distance is smaller than a preset distance threshold value.
9. An intelligent television, characterized in that the intelligent television comprises:
the microwave radar module, the calculation module and the television control module are sequentially in communication connection;
the microwave radar module is arranged at a non-metal part in the smart television and used for acquiring radar information and sending the radar information to the calculation module;
the calculation module is used for calculating and acquiring the actual distance between a target object and a television screen based on the radar information and sending the actual distance to the television control module;
and the television control module is used for controlling the television screen to stop displaying the television programs when the actual distance is smaller than a preset distance threshold value.
10. A computer-readable storage medium, having a television control program stored thereon, which, when executed by a processor, performs the steps of the television control method according to any one of claims 1 to 7.
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