Outdoor advertising lamp box

Abstract

According to the outdoor advertising lamp box, the inside and outside box temperature detection module, the inside and outside box humidity detection module, the camera, the central control module, the communication module, the temperature and humidity regulation and control module, the touch screen, the picture calling module and the picture frequency updating module are arranged, and all the modules are coordinated and matched; the system is matched with pictures stored in a memory, calls pictures most interested by people, can be intelligently controlled in combination with general crowd receiving time, or is controlled by people to touch and control picture updating frequency, and sends an instruction to a master control and switches to a low-power-consumption mode when crowd flow is lower than a preset threshold value at night, thereby being beneficial to energy conservation and consumption reduction. According to the outdoor environment information and the temperature information inside and outside the lamp box, the cooling power can be controlled through ventilation and heat exchange of natural window opening and a forced refrigerator, so that the temperature is controlled, and energy conservation and consumption reduction are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of publicity light boxes, and in particular relates to an open-air advertising light box. Background Art

[0002] Open-air propaganda light boxes refer to advertising light boxes set up in open-air environments. They can attract people's attention with their bright colors and patterns, and play a role in quickly promoting and disseminating advertising information. Traditional advertising carriers that use blister, acrylic, spray-painted cloth, etc. as substrates and adopt box-type hollow structures, while transparent substrates and digital display glass can display advertising content at will without the need to frequently replace spray-painted cloth. They have gradually become the mainstream, but they need to be powered on to drive the digital display glass to display the screen. The digital display glass usually generates heat, and severe heat may cause fire. The main control communication is required to receive the screen to be displayed, control the temperature in the light box, and switch the display screen. However, the temperature in the light box is usually controlled by heaters and coolers, and the display screen is switched at a fixed frequency, which is not conducive to energy saving and consumption reduction. In addition, the screen cannot be displayed according to the characteristics of the audience in the time period, which is not conducive to the audience's reception and conversion of the display screen, and cannot achieve the effect of rapid propaganda and dissemination. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an open-air advertising light box, which effectively solves the problem that the prior art is not conducive to energy saving and consumption reduction, and is not conducive to the reception and conversion of the display images by the target audience.

[0004] The technical solution is to include a temperature detection module inside and outside the box, a humidity detection module inside and outside the box, a camera, a central control, a communication module, a temperature and humidity control module, and a digital display glass. The temperature detection module inside and outside the box uses a multi-point temperature sensor to detect temperature information and transmit it to the central control; The humidity detection module inside and outside the box uses multi-point humidity sensors to detect humidity information and transmit it to the central control; The image information collected by the camera is transmitted to the central control, wherein the central control is MT6765V / C, which is equipped with a memory for analysis and processing, and outputs the control information to the temperature and humidity control module, which is interactively displayed through the digital display glass and remotely communicated through the communication module.

[0005] Preferably, it also includes a picture retrieval module, which matches the pictures stored in the memory according to the crowd in the time period and the interest level of the people, and retrieves the pictures that most interest the people.

[0006] Preferably, it also includes a picture frequency update module, which is intelligently controlled by the interest index and human touch control.

[0007] Preferably, a pre-analysis module is also provided between the temperature detection module inside and outside the box and the central control; The pre-analysis module includes a control mode analysis module and a control amount analysis module, and the control mode analysis module is connected to the control amount analysis module; The control mode analysis module includes a resistor R1, one end of the resistor R1 is connected to the wind speed signal through a diode D9, one end of the resistor R1 is connected to the rainfall signal through a diode D10, the other end of the resistor R1 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to the power supply +1.2V, the collector of the transistor Q1 is connected to the control end of the switch K1, the left end of the switch K1 is connected to the temperature signal outside the light box detected by the temperature sensor, the right end of the switch K1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to the power supply +3.8V, the collector of the transistor Q2 is connected to the pin 2 of the photoelectric coupler OP1, the pin 1 of the photoelectric coupler OP1 is connected to the emitter of the transistor Q2, the collector of the transistor Q2 is connected to the power supply +5V, the pin 4 of the photoelectric coupler OP1 is connected to the power supply +5V, and the pin 3 of the photoelectric coupler OP1 is connected to the control end of the switch QK1; The control quantity analysis module includes a diode D1, the positive electrode of the diode D1 is connected to the temperature signal in the lamp box detected by the temperature sensor, the negative electrode of the diode D1 is respectively connected to one end of the capacitor C1, one end of the grounded capacitor C2, and the left end of the switch K2, the other end of the capacitor C1 is connected to one end of the grounded inductor L1, the right end of the switch K2 is respectively connected to one end of the grounded capacitor C3 and the non-inverting input end of the operational amplifier AR1, the inverting input end and the output end of the operational amplifier AR1 are respectively connected to one end of the bidirectional diode SD1, one end of the resistor R3, the inverting input end of the operational amplifier AR4, one end of the resistor R6, and one end of the capacitor C4, the other end of the bidirectional diode SD1 is connected to the base of the transistor Q2, the other end of the resistor R3 is respectively connected to the non-inverting input end of the operational amplifier AR2, the inverting input end of the operational amplifier AR2 is respectively connected to the positive electrode of the diode D2 and one end of the resistor R4, The output end of amplifier AR2 is respectively connected to the cathode of diode D2 and the anode of diode D3, the cathode of diode D3 is respectively connected to the anode of grounded electrolytic capacitor E1, one end of grounded resistor R5 and the non-inverting input end of operational amplifier AR3, the inverting input end and output end of operational amplifier AR4 are respectively connected to the other end of resistor R4 and one end of inductor L1, the non-inverting input end of operational amplifier AR4 is connected to ground, the other end of inductor L1 is connected to the common end of switch QK1, the other end of inductor L1 is also connected to the right end of switch K3 and one end of grounded capacitor C5, the left end of switch K3 is respectively connected to the output end of operational amplifier AR4, the other end of resistor R6 and the other end of capacitor C4, the normally open contact of switch QK1 is output to the main control IO port, and ventilation and heat exchange are controlled according to the temperature signals inside and outside the light box, the normally closed contact of switch QK1 is output to the main control IO port, and the cooling power is controlled according to the temperature signal inside the light box.

[0008] The beneficial effects of the present invention are as follows: 1. According to the crowd and the interest index of the personnel in the time period, the screen stored in the memory is matched, and the screen that the personnel are most interested in is retrieved. The main control can intelligently control the screen update frequency according to the interest index and the reception time of the normal crowd, or the personnel touch the control screen. When the crowd flow rate is lower than the preset threshold at midnight, the main control sends a command to switch to the low power consumption mode. In this way, the screen can be displayed according to the characteristics of the audience in the time period, which is conducive to the reception and conversion of the displayed screen by the audience, and has the effect of rapid publicity and dissemination. The screen frequency can be intelligently updated according to the interest index and the reception time of the crowd, and further switched to the low power consumption mode according to the crowd flow, which is conducive to energy saving and consumption reduction; 2. According to the outdoor environment information and the temperature information inside and outside the light box, it can adopt natural window ventilation and heat exchange and compulsory refrigerator to control the cooling power to control the temperature, which is beneficial to energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the overall module diagram of the present invention.

[0010] Figure 2 It is the circuit diagram of the pre-analysis module of the present invention.

[0011] Figure 3 It is a circuit diagram of a crowd interest assessment module of the present invention. DETAILED DESCRIPTION

[0012] The technical solutions of various embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0013] The following is in conjunction with the instruction manual Figures 1 to 3 , the specific implementation modes of the present invention are further described in detail.

[0014] An open-air advertising light box includes a temperature detection module inside and outside the box, a humidity detection module inside and outside the box, a camera, a central control, a communication module, a temperature and humidity control module, and a digital display glass. The temperature detection module inside and outside the box uses a multi-point temperature sensor to detect temperature information and transmit it to the central control. Specifically, multiple thermocouples installed at key positions are used for temperature detection. The central control uses a bubbling method to sort and judge the difference between the highest temperature and the lowest temperature. When the temperature difference is relatively large, exceeding 5 degrees Celsius, a fan is first used to assist in circulation and mix the air in the light box to make the temperature in the light box uniform, and then multiple thermocouples are collected for temperature detection after uniformity. The measurement data of multiple sensors are used to eliminate the errors and uncertainties that may exist when a single sensor is measured, thereby improving the accuracy of temperature measurement; The humidity detection module inside and outside the box adopts a multi-point humidity sensor to detect humidity information and transmit it to the central control. For example, a HYT-271 analog humidity sensor can be used for detection. The principle process of the detection method can be the same as the principle process of the temperature detection method, which will not be described here; The image information collected by the camera is transmitted to the central control, and the image information includes crowd behavior image information, as well as smoke and vibration security information. For example, the 8 Max smart camera 3K 5 million gimbal version with visual tracking function can be used, which can perform motion tracking, human shape and face recognition, and the central control can control the priority tracking of security information. Among them, the central control is MT6765V / C, which is equipped with 4 A53 cores with a main frequency of up to 2.3GHz and 4 A53 cores with a main frequency of 1.8GHz, and is matched with a 12nm process technology. It provides high performance and excellent computing power, supports smooth graphics processing and high-quality visual effects, and has built-in comprehensive wireless communication functions, including WLAN, Bluetooth and GPS, with rich interfaces, including LCM, camera, touch screen, microphone, etc., and is equipped with a memory for analysis, processing, and output of control information to the temperature and humidity control module. The control equipment is window ventilation and heat dissipation, refrigerator and heater temperature control, interactive display through digital display glass, remote communication through the communication module, communication reception, and storage of the screen to be displayed.

[0015] On the basis of the above technical solution, a picture retrieval module is also included, which matches the pictures stored in the memory according to the crowd in the time period and the interest level of the people, and retrieves the pictures that the people are most interested in. The specific steps are as follows: Step 1, obtaining the pictures stored in the memory and the historical interest indexes estimated by the corresponding groups of people for different types of pictures in different time periods; Step 2: Get the current time and time period analysis, and automatically analyze the characteristics of crowd activities according to the current time, such as rush hour, morning exercise and walking, etc.; Step 3: The camera captures images in real time, and obtains a real-time interest index through face recognition and behavior analysis, which is then weighted with the historical interest index to obtain a revised interest index; Step 4, quickly filter and match the images in the memory according to the current time period, characteristics of crowd activities and interest index; Step 5, screen retrieval and display: The screen retrieval module retrieves the corresponding screen from the memory based on the matching result, and displays it to the target group through the digital display glass.

[0016] On the basis of the above technical scheme, it also includes a picture frequency update module, which can be mainly controlled by the main control according to the interest index and combined with the normal crowd reception time, or controlled by the touch of the personnel, and when the crowd flow (which can be tracked and monitored by the camera) is lower than the preset threshold late at night, it sends a command to the main control to switch to low power consumption mode, such as reducing the brightness of the digital display glass, dynamically adjusting the display screen update frequency, deep standby, etc. In this way, the picture can be displayed according to the characteristics of the audience in the time period, which is beneficial to the audience's reception and conversion of the displayed picture, and has a rapid publicity and dissemination effect, and can intelligently update the picture frequency according to the interest index and the crowd reception time, and further switch to low power consumption mode according to the crowd flow, which is beneficial to energy saving and consumption reduction.

[0017] On the basis of the above technical solution, a pre-analysis module is further provided between the temperature detection module inside and outside the box and the central control; The pre-analysis module includes a control mode analysis module and a control amount analysis module, and the control mode analysis module is connected to the control amount analysis module; The control mode analysis module is connected to the detected wind speed signal and rainfall model outside the light box through the resistor R1. When there is no rain and the wind speed level is low (level 1 to 3), the PNP transistor Q1 is turned on, and the +1.2V trigger switch K1 is closed. The temperature signal outside the light box is added to the base of the transistor Q2 through the resistor R2. Since the temperature inside the outdoor light box is affected by many factors, including the size of the light box, the light-emitting mode, the outdoor ambient temperature, the light box material, etc., it is assumed that the light box material has good heat insulation conditions and is only affected by the heat. The low When the voltage corresponding to 29 degrees Celsius is +24V, transistor Q2 is turned on, +3.8V is added to pin 2 of photocoupler OP1, pin 2 of photocoupler OP1 is connected to the temperature signal in the light box, the temperature signal in the light box exceeds the threshold (that is, the digital display glass and main control electronic components allow the temperature to be 30~40 degrees Celsius), which is set to 40 degrees Celsius, transistor Q2 is turned on, +5V is added to pin 1 of photocoupler OP1, photocoupler OP1 is turned on, and photocoupler OP1 outputs +5V to trigger switch QK1 to operate, thereby Through the analysis of the temperature inside and outside the light box, when the temperature inside the light box exceeds the threshold and the temperature outside the light box is low, that is, when the temperature can be lowered by opening the window for ventilation and heat exchange, ventilation and heat exchange are adopted to save energy and reduce consumption, including a resistor R1, one end of the resistor R1 is connected to the wind speed signal through the diode D9, one end of the resistor R1 is connected to the rainfall signal through the diode D10, the other end of the resistor R1 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to the power supply +1.2V, the collector of the transistor Q1 is connected to the control end of the switch K1, and the left end of the switch K1 is connected Connect the temperature signal outside the light box detected by the temperature sensor, the right end of the switch K1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to the power supply +3.8V, the collector of the transistor Q2 is connected to the pin 2 of the photocoupler OP1, the pin 1 of the photocoupler OP1 is connected to the emitter of the transistor Q2, the collector of the transistor Q2 is connected to the power supply +5V, the pin 4 of the photocoupler OP1 is connected to the power supply +5V, and the pin 3 of the photocoupler OP1 is connected to the control end of the switch QK1; The control quantity analysis module receives the temperature signal in the lamp box detected by the temperature sensor, and is subjected to reverse voltage protection by a diode, LC filtering, sampling and holding by an operational amplifier AR1, a switch K2, and a capacitor C1, and then is divided into three paths. One path is added to the base of the transistor Q2 through a bidirectional diode SD1 to determine whether the temperature in the lamp box exceeds the threshold value. Another path detects the peak value through a peak detection circuit composed of operational amplifiers AR2 and AR3, diodes D2 and D3, resistors R4, and resistor R5, and is added to the common end of the switch QK1. The third path enters an integrator composed of an operational amplifier AR4, a resistor R6, and a capacitor C4 to calculate the rate of change of the temperature signal. The rate of change is sampled by the switch K3 and the capacitor C5. The charging of the sampling interval is calculated, and the total change rate of the sampling interval is calculated and added to the common end of the switch QK1, which plays the role of temperature signal prediction, thereby outputting the required temperature control quantity signal, and taking this as the main control to control the size and duration of the window opening, and the cooling power of the refrigerator, so that the temperature in the light box is kept within the allowable range, including a diode D1, the positive electrode of the diode D1 is connected to the temperature signal in the light box detected by the temperature sensor, the negative electrode of the diode D1 is respectively connected to one end of the capacitor C1, one end of the grounded capacitor C2, and the left end of the switch K2, the other end of the capacitor C1 is connected to one end of the grounded inductor L1, and the right end of the switch K2 is respectively connected to one end of the grounded capacitor C3 and the non-inverting input end of the operational amplifier AR1. The inverting input terminal and output terminal of the operational amplifier AR1 are respectively connected to one end of the bidirectional diode SD1, one end of the resistor R3, the inverting input terminal of the operational amplifier AR4, one end of the resistor R6, and one end of the capacitor C4. The other end of the bidirectional diode SD1 is connected to the base of the transistor Q2. The other ends of the resistor R3 are respectively connected to the non-inverting input terminal of the operational amplifier AR2. The inverting input terminal of the operational amplifier AR2 is respectively connected to the anode of the diode D2 and one end of the resistor R4. The output terminal of the operational amplifier AR2 is respectively connected to the cathode of the diode D2 and the anode of the diode D3. The cathode of the diode D3 is respectively connected to the anode of the grounded electrolytic capacitor E1, one end of the grounded resistor R5, and the operational amplifier The non-inverting input terminal of the amplifier AR3, the inverting input terminal and the output terminal of the operational amplifier AR4 are respectively connected to the other end of the resistor R4 and one end of the inductor L1, the non-inverting input terminal of the operational amplifier AR4 is connected to the ground, the other end of the inductor L1 is connected to the common end of the switch QK1, the other end of the inductor L1 is also connected to the right end of the switch K3 and one end of the grounded capacitor C5, the left end of the switch K3 is respectively connected to the output end of the operational amplifier AR4, the other end of the resistor R6, and the other end of the capacitor C4, the normally open contact of the switch QK1 is output to the main control IO port, and the ventilation and heat exchange are controlled according to the temperature signals inside and outside the light box, the normally closed contact of the switch QK1 is output to the main control IO port, and the cooling power is controlled according to the temperature signal inside the light box.

[0018] On the basis of the above technical solution, it also includes a crowd interest assessment module, which receives the parameter image information of the people's gaze duration, gaze times, blinking frequency, and time period captured by the camera. Specifically, the people's image information captured by the camera can be used to detect and track faces in real time in the video stream. After the face is detected, the eye area is further located, and the eye tracking technology is used to capture the movement trajectory of the eyeball through the camera to calculate the gaze point position. For example, image processing technology such as edge detection and corner point detection is used. Detection, etc., gaze duration and frequency statistics: According to the gaze point data, the duration and frequency of a person's gaze on a specific area or object are counted. This can be achieved by analyzing the gaze point trajectory and dwell time. Blinking frequency calculation: By detecting the opening and closing state of the eyes, the blinking frequency is calculated, and the image of the eye area is subjected to inter-frame difference or optical flow analysis to identify the blinking action and obtain the degree of concentration. For example, the time period population can be divided into age groups for identification. The pre-processed face image is subjected to feature extraction using a deep learning model (such as a convolutional neural network). These features may include facial contours, skin texture, wrinkle distribution, etc. Based on the extracted features, the age of the face image is predicted using a trained age estimation model. The age estimation model is usually obtained by training a large amount of image data labeled with age. It can learn the relationship between features and age and evaluate the interest level value of each parameter. The interest level value is quantified, weighted, and fused by the hardware method of the circuit structure to calculate the interest index, and the interest index enters the central control; The quantization is implemented by a quantization submodule, and the structure and process are described in detail by taking the blinking frequency parameter as an example. The transistor Q3 or the transistors Q3 and Q4 are turned on according to the blinking frequency to realize the conversion of the blinking frequency into a +2.5V or +7.5V voltage. The module includes a transistor Q3 and a voltage regulator Z1. The base of the transistor Q3 and the cathode of the voltage regulator Z1 are connected to the blinking frequency information. The collector of the transistor Q3 is connected to the power supply +2.5V. The anode of the voltage regulator Z1 is connected to the base of the transistor Q4. The collector of the transistor Q4 is connected to the power supply +5V. The emitter of the transistor Q3 is connected to the anode of the diode D4. The emitter of the transistor Q4 is connected to the anode of the diode D5. The cathode of the diode D4 is respectively connected to the cathode of the diode D5 and one end of the grounding resistor R7. The cathode of the diode D4 is the output signal of the quantization submodule. The weighting is implemented by a weighting submodule, which receives a +2.5V or +7.5V voltage and enters a proportional amplifier composed of an operational amplifier AR5, a feedback potentiometer RP2, an input resistor R8, and a balancing resistor R9. The weight of the weighting is set by the size of the potentiometer RP2. Here, the weight of the blinking frequency is set to 20%, the weight of the person's gaze duration is set to 20%, the weight of the gaze times is set to 30%, and the weight of the time period crowd is set to 30%. It includes an operational amplifier AR5, the inverting input end of the operational amplifier AR5 is respectively connected to one end of the resistor R8, the left end and the adjustable end of the potentiometer RP2, the other end of the resistor R8 is connected to the cathode of the diode D4, the non-inverting input end of the operational amplifier AR5 is connected to the ground through the resistor R9, and the output end of the operational amplifier AR5 is respectively connected to the right end of the potentiometer RP2 as the weighting submodule output signal; The fusion is realized by a fusion submodule, and the weighted blinking frequency, the person's gaze duration, the number of gazes, and the crowd voltage in the time period are added and fused through an adder composed of an operational amplifier AR7, resistors R17, and R18 to obtain a total voltage, including an operational amplifier AR7, the inverting input end of the operational amplifier AR7 is respectively connected to the other end of the resistor R10, one end of the resistor R18, and the weighted submodule output signal of other parameters, the non-inverting input end of the operational amplifier AR7 is connected to the ground through the resistor R17, and the output end of the operational amplifier AR5 and the other end of the resistor R18 are the output signal of the fusion submodule; The interest index is implemented by a division submodule, which receives the total voltage after fusion, and divides the voltage of interest (full index) by a divider composed of an operational amplifier AR5, a multiplier ID3, and resistors R19-R21 to obtain the interest index, including resistor R19, one end of which is connected to the output end of the operational amplifier AR5, and the other end of which is respectively connected to one end of resistor R20 and the inverting input end of the operational amplifier AR8, the non-inverting input end of the operational amplifier AR8 is connected to the ground through resistor R21, the output end of the operational amplifier AR8 and the Y end of the multiplier ID3 output signals to the central control IO port, the X end of the multiplier ID3 is connected to the voltage of interest, and the U0 end of the multiplier ID3 is connected to one end of the resistor R20 and the other end of the resistor R20.

[0019] When the present invention is used specifically, the temperature detection module inside and outside the box adopts multi-point temperature sensors to detect temperature information and transmits it to the central control; the humidity detection module inside and outside the box adopts multi-point humidity sensors to detect humidity information and transmits it to the central control; the image information collected by the camera is transmitted to the central control; the image information includes crowd behavior image information and also includes smoke and vibration security information; it has rich interfaces, including cameras, and is equipped with a memory for analysis, processing, and outputting control information to the temperature and humidity control module; the control equipment includes window ventilation and heat dissipation, refrigerator and heater temperature control; specifically, the pre-analysis module analyzes and determines the control mode and control amount, which is beneficial to energy saving and consumption reduction; interactive display is performed through digital display glass, remote communication is performed through the communication module, communication is received, and the picture to be displayed is stored; it also includes a picture retrieval module, and the main control matches the picture stored in the memory according to the crowd and interest level of the personnel in the time period, and retrieves the picture that the personnel are most interested in. , and also includes a picture frequency update module, which can be mainly controlled by the main control according to the interest index and combined with the normal crowd reception time, or controlled by the touch of the personnel, and when the crowd flow in the middle of the night is lower than the preset threshold, it sends a command to the main control to switch to low power consumption mode. In this way, the picture can be displayed according to the characteristics of the audience in the time period, which is conducive to the audience's reception and conversion of the displayed picture, and has a rapid publicity and dissemination effect. It can also update the picture frequency intelligently according to the interest index and the crowd reception time, and further switch to low power consumption mode according to the crowd flow, which is conducive to energy saving and consumption reduction. Among them, the interest index is obtained by the crowd interest evaluation module, which receives the parameter image information of the personnel's gaze time, gaze number, blinking frequency, and time period crowd captured by the camera, and evaluates the interest level value of each parameter. The interest level value is quantified, weighted, and fused by the hardware method of the circuit structure to calculate the interest index, and the interest index enters the central control.

Claims

1. An open-air advertising light box, including a temperature detection module inside and outside the box, a humidity detection module inside and outside the box, a camera, a central control, a communication module, a temperature and humidity control module, and a digital display glass, characterized in that: The temperature detection module inside and outside the box uses multiple temperature sensors to detect temperature information and transmit it to the central control; The humidity detection module inside and outside the box uses multi-point humidity sensors to detect humidity information and transmit it to the central control; The image information collected by the camera is transmitted to the central control, wherein the central control is MT6765V / C, which is equipped with a memory for analysis and processing, and outputs the control information to the temperature and humidity control module, which is interactively displayed through the digital display glass and remotely communicated through the communication module.

2. The open-air advertising light box according to claim 1, characterized in that: It also includes a picture retrieval module, which matches the pictures stored in the memory according to the crowd in the time period and the interest level of the people, and retrieves the pictures that most interest the people.

3. The open-air advertising light box according to claim 1, characterized in that: It also includes a screen frequency update module, which is intelligently controlled by interest index and personnel touch control.

4. The open-air advertising light box according to claim 1, characterized in that: A pre-analysis module is also provided between the temperature detection module inside and outside the box and the central control; The pre-analysis module includes a control mode analysis module and a control amount analysis module, and the control mode analysis module is connected to the control amount analysis module; The control mode analysis module includes a resistor R1, one end of the resistor R1 is connected to the wind speed signal through a diode D9, one end of the resistor R1 is connected to the rainfall signal through a diode D10, the other end of the resistor R1 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to the power supply +1.2V, the collector of the transistor Q1 is connected to the control end of the switch K1, the left end of the switch K1 is connected to the temperature signal outside the light box detected by the temperature sensor, the right end of the switch K1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to the power supply +3.8V, the collector of the transistor Q2 is connected to the pin 2 of the photoelectric coupler OP1, the pin 1 of the photoelectric coupler OP1 is connected to the emitter of the transistor Q2, the collector of the transistor Q2 is connected to the power supply +5V, the pin 4 of the photoelectric coupler OP1 is connected to the power supply +5V, and the pin 3 of the photoelectric coupler OP1 is connected to the control end of the switch QK1; The control quantity analysis module includes a diode D1, the positive electrode of the diode D1 is connected to the temperature signal in the lamp box detected by the temperature sensor, the negative electrode of the diode D1 is respectively connected to one end of the capacitor C1, one end of the grounded capacitor C2, and the left end of the switch K2, the other end of the capacitor C1 is connected to one end of the grounded inductor L1, the right end of the switch K2 is respectively connected to one end of the grounded capacitor C3 and the non-inverting input end of the operational amplifier AR1, the inverting input end and the output end of the operational amplifier AR1 are respectively connected to one end of the bidirectional diode SD1, one end of the resistor R3, the inverting input end of the operational amplifier AR4, one end of the resistor R6, and one end of the capacitor C4, the other end of the bidirectional diode SD1 is connected to the base of the transistor Q2, the other end of the resistor R3 is respectively connected to the non-inverting input end of the operational amplifier AR2, the inverting input end of the operational amplifier AR2 is respectively connected to the positive electrode of the diode D2 and one end of the resistor R4, The output end of amplifier AR2 is respectively connected to the cathode of diode D2 and the anode of diode D3, the cathode of diode D3 is respectively connected to the anode of grounded electrolytic capacitor E1, one end of grounded resistor R5 and the non-inverting input end of operational amplifier AR3, the inverting input end and output end of operational amplifier AR4 are respectively connected to the other end of resistor R4 and one end of inductor L1, the non-inverting input end of operational amplifier AR4 is connected to ground, the other end of inductor L1 is connected to the common end of switch QK1, the other end of inductor L1 is also connected to the right end of switch K3 and one end of grounded capacitor C5, the left end of switch K3 is respectively connected to the output end of operational amplifier AR4, the other end of resistor R6 and the other end of capacitor C4, the normally open contact of switch QK1 is output to the main control IO port, and ventilation and heat exchange are controlled according to the temperature signals inside and outside the light box, the normally closed contact of switch QK1 is output to the main control IO port, and the cooling power is controlled according to the temperature signal inside the light box.

5. The open-air advertising light box according to claim 1, characterized in that: It also includes a crowd interest evaluation module, which receives the parameter image information of the people's gaze duration, gaze times, blinking frequency, and time period captured by the camera, and evaluates the interest level value of each parameter. The interest level value is quantified, weighted, and fused to calculate the interest index, and the interest index enters the central control; The quantization is implemented by a quantization submodule, and the structure and process are described in detail by taking the blink frequency parameter as an example, including a transistor Q3 and a voltage regulator Z1, the base of the transistor Q3 and the cathode of the voltage regulator Z1 are connected to the blink frequency information, the collector of the transistor Q3 is connected to the power supply +2.5V, the anode of the voltage regulator Z1 is connected to the base of the transistor Q4, the collector of the transistor Q4 is connected to the power supply +5V, the emitter of the transistor Q3 is connected to the anode of the diode D4, the emitter of the transistor Q4 is connected to the anode of the diode D5, the cathode of the diode D4 is respectively connected to the cathode of the diode D5 and one end of the grounding resistor R7, and the cathode of the diode D4 is the output signal of the quantization submodule; The weighting is implemented by a weighting submodule, including an operational amplifier AR5, an inverting input terminal of the operational amplifier AR5 is respectively connected to one end of a resistor R8, a left end and an adjustable end of a potentiometer RP2, the other end of the resistor R8 is connected to the cathode of a diode D4, a non-inverting input terminal of the operational amplifier AR5 is connected to the ground through a resistor R9, and an output terminal of the operational amplifier AR5 is respectively connected to the right end of the potentiometer RP2 to output a signal of the weighting submodule; The fusion is realized by a fusion submodule, including an operational amplifier AR7, the inverting input end of the operational amplifier AR7 is respectively connected to the other end of the resistor R10, one end of the resistor R18, and the output signal of the weighted submodule of other parameters, the non-inverting input end of the operational amplifier AR7 is connected to the ground through the resistor R17, and the output end of the operational amplifier AR5 and the other end of the resistor R18 are the output signal of the fusion submodule; The interest index is implemented by a division submodule, including a resistor R19, one end of the resistor R19 is connected to the output end of the operational amplifier AR5, the other end of the resistor R19 is respectively connected to one end of the resistor R20 and the inverting input end of the operational amplifier AR8, the non-inverting input end of the operational amplifier AR8 is connected to the ground through a resistor R21, the output end of the operational amplifier AR8 and the Y end of the multiplier ID3 output signals to the central control IO port, the X end of the multiplier ID3 is connected to the voltage of interest, and the U0 end of the multiplier ID3 is connected to one end of the resistor R20 and the other end of the resistor R20.

6. The open-air advertising light box according to claim 1, characterized in that: The camera has visual tracking function and prioritizes tracking security information.

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