Intelligent projector inclination angle self-adaption system

Abstract

The invention discloses an intelligent projector inclination angle self-adaption system which comprises an image acquisition module, an inclination detection module, an image processing module, a positioning module, an adjustment control module, an environment sensing module, a wireless communication module, a fault diagnosis module and a user interaction module. The camera is installed in front of the projector and used for collecting projection pictures in real time, and the image sensor is used for converting collected optical signals into electric signals; the inclination detection module comprises an accelerometer and a gyroscope, and the accelerometer is used for detecting the inclination angle of the projector. According to the invention, the image acquisition module, the inclination detection module, the image processing module, the positioning module and the adjustment control module are arranged, and a high-precision sensor and an image processing algorithm are adopted, so that the inclination angle of the projector can be automatically detected, corresponding adjustment is carried out, the adjustment precision is ensured, and the projection quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of intelligent projectors, and in particular relates to an intelligent projector tilt angle adaptive system. Background Art

[0002] A projector, also known as a projector, is a device that can project images or videos onto a screen. It can be connected to computers, VCDs, DVDs, BDs, game consoles, DVs, etc. through different interfaces to play corresponding video signals.

[0003] With the development of multimedia technology, projectors have become one of the indispensable devices in conferences, teaching, entertainment and other occasions. However, in actual use, the placement and angle of the projector may change, resulting in trapezoidal distortion of the projected image, affecting the viewing experience. The traditional manual adjustment method is time-consuming and labor-intensive, and it is difficult to achieve the desired effect. Therefore, the development of an intelligent system that can automatically adjust the tilt angle of the projector is of great significance to improving the projection quality and user experience. Summary of the invention

[0004] The purpose of the present invention is to provide an intelligent projector tilt angle adaptive system to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an intelligent projector tilt angle adaptive system, comprising an image acquisition module, a tilt detection module, an image processing module, a positioning module, an adjustment control module, an environment perception module, a wireless communication module, a fault diagnosis module and a user interaction module,

[0006] The image acquisition module includes a camera and an image sensor. The camera is installed in front of the projector and is used to acquire the projection image in real time. The image sensor is used to convert the acquired optical signal into an electrical signal.

[0007] The tilt detection module includes an accelerometer and a gyroscope, wherein the accelerometer is used to detect the tilt angle of the projector, and the gyroscope is used to assist the accelerometer to improve the accuracy of tilt angle detection;

[0008] The image processing module is used to analyze the images captured by the image acquisition module and calculate the trapezoidal distortion parameters;

[0009] The positioning module is used to automatically identify the position of the projector and adjust the projection direction;

[0010] The adjustment control module is used to automatically adjust the tilt angle of the projector according to the information of the tilt detection module and the image processing module;

[0011] The environment sensing module is in communication connection with the image acquisition module, and is used to sense the light intensity and sound of the surrounding environment to optimize the projection effect;

[0012] The wireless communication module is used to connect to external devices to achieve remote control function;

[0013] The fault diagnosis module is used to detect abnormal conditions of the system and provide solutions;

[0014] The user interaction module is used to receive user instructions and feed back adjustment results.

[0015] Preferably, the step of detecting the tilt angle of the projector in the tilt detection module includes:

[0016] S1. Initialization: Initialize the accelerometer and gyroscope, set the appropriate sampling rate and resolution, perform zero calibration on the accelerometer, and eliminate bias errors;

[0017] S2. Data collection: collect three-axis acceleration data through the accelerometer and collect three-axis angular velocity data through the gyroscope;

[0018] S3. Static tilt angle calculation: Calculate the static tilt angle using accelerometer data;

[0019] S4. Dynamic tilt angle fusion: Based on the principle that the accelerometer will be affected by linear acceleration under dynamic conditions, a complementary filter is used to fuse the accelerometer and gyroscope data;

[0020] S5. Angle correction: Correct the gyroscope data by comparing the difference between the accelerometer and gyroscope data;

[0021] S6. Output result: output the finally calculated tilt angle to the adjustment control module to adjust the tilt angle of the projector.

[0022] Preferably, the static tilt angle calculation in S3 specifically includes the following formula:

[0023] X-axis tilt angle:

[0024]

[0025] Y-axis tilt angle:

[0026]

[0027] Among them, a x 、a y and a z Represents the acceleration values ​​of the X, Y, and Z axes respectively.

[0028] Preferably, the formula for fusing the accelerometer and gyroscope data using a complementary filter in the S4 dynamic tilt angle fusion includes:

[0029] θ fused =(1-α)θ gyro +αθ accel ;

[0030] Among them, θ fused is the tilt angle after fusion, θ gyro is the tilt angle calculated based on the gyroscope alone, θ accel is the tilt angle calculated based on the accelerometer alone, and α is the fusion coefficient, usually between 0.01 and 0.1.

[0031] Preferably, the gyroscope assists the accelerometer to improve the accuracy of tilt angle detection by using a gyroscope angular velocity integral formula, and the specific formula is as follows:

[0032] θ gyro (t) = θ gyro (t-1)+ω(t)·Δt;

[0033] Among them, θ gyro (t) is the tilt angle at the current moment t; θ gyro (t-1) is the tilt angle at the previous moment t-1; ω(t) is the angular velocity at the current moment; Δt is the sampling interval.

[0034] Preferably, the image processing module includes an image preprocessing unit, a trapezoidal distortion detection unit and a distortion parameter calculation unit. The image preprocessing unit is used to perform denoising and contrast enhancement operations on the collected picture data to improve image quality. The trapezoidal distortion detection unit is used to identify trapezoidal distortion parameters through an image processing algorithm. The distortion parameter calculation unit is used to calculate the angle value that needs to be adjusted based on the detected trapezoidal distortion.

[0035] Preferably, the positioning module includes an ultrasonic sensor, an infrared sensor and a laser rangefinder, the ultrasonic sensor is used to measure the distance between the projector and the wall to help determine the optimal projection position, the infrared sensor is used to assist the ultrasonic sensor to improve the accuracy of distance measurement, and the laser rangefinder is used to provide higher precision distance measurement.

[0036] Preferably, the adjustment control module includes a servo motor, a control circuit and a feedback system, the servo motor is used to drive the tilt adjustment mechanism of the projector, the control circuit is used to receive information from the image processing module and control the rotation angle of the servo motor, and the feedback system is used to monitor the movement state of the servo motor in real time to ensure the adjustment accuracy.

[0037] Preferably, the environmental perception module includes an ambient light sensor and a sound sensor, the ambient light sensor is used to detect the light intensity of the surrounding environment and adjust the brightness of the projector, and the sound sensor is used to monitor the environmental noise and work with the image processing module to improve the accuracy of speech recognition; the wireless communication module includes a Wi-Fi / Bluetooth chip and a mobile network interface, the Wi-Fi / Bluetooth chip is used for wireless network connection to realize remote control of the projector, and the mobile network interface is used to communicate with the cloud server through the 4G / 5G network to obtain updates or remote technical support.

[0038] Preferably, the fault diagnosis module includes a hardware self-check unit, a software self-check unit and a remote maintenance unit. The hardware self-check unit is used to regularly check the status of system hardware, such as motors and sensors; the software self-check unit is used to regularly run software diagnostic programs to ensure the normal operation of the software; the remote maintenance unit is used to connect to a cloud server via a wireless communication module to perform remote troubleshooting and repair; the user interaction module includes a touch screen, a voice recognition unit and a remote control. The touch screen is used to display the status information of the projector and receive user instructions; the voice recognition unit is used to perform voice commands to achieve voice control; the remote control is used to provide physical buttons to facilitate remote operation.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] (1) The present invention can automatically detect the tilt angle of the projector, make corresponding adjustments, ensure the adjustment accuracy, and improve the projection quality by setting an image acquisition module, a tilt detection module, a positioning module, and an adjustment control module, and using a high-precision sensor and an image processing algorithm;

[0041] (2) The present invention can sense the light intensity and sound of the surrounding environment by setting up an environmental perception module, so as to adjust the brightness of the projector and improve the accuracy of voice recognition. By setting up a fault diagnosis module, it can detect abnormal conditions of the system and promptly discover and repair software problems, thereby ensuring the normal operation of the system.

[0042] (3) The present invention provides a user interaction module, so that the user can easily operate through a touch screen, voice or remote control without manual adjustment. In addition, by providing an image processing module, the viewing experience of the projected image can be improved and the discomfort caused by trapezoidal distortion can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural block diagram of the present invention. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1 The present invention provides a technical solution: an intelligent projector tilt angle adaptive system, including an image acquisition module, a tilt detection module, an image processing module, a positioning module, an adjustment control module, an environment perception module, a wireless communication module, a fault diagnosis module and a user interaction module,

[0046] The image acquisition module includes a camera and an image sensor. The camera is installed in front of the projector and is used to acquire the projection image in real time. The image sensor is used to convert the acquired optical signal into an electrical signal.

[0047] The tilt detection module includes an accelerometer and a gyroscope, wherein the accelerometer is used to detect the tilt angle of the projector, and the gyroscope is used to assist the accelerometer to improve the accuracy of tilt angle detection;

[0048] The image processing module is used to analyze the images captured by the image acquisition module and calculate the trapezoidal distortion parameters;

[0049] The positioning module is used to automatically identify the position of the projector and adjust the projection direction;

[0050] The adjustment control module is used to automatically adjust the tilt angle of the projector according to the information of the tilt detection module and the image processing module;

[0051] The environment sensing module is in communication connection with the image acquisition module, and is used to sense the light intensity and sound of the surrounding environment to optimize the projection effect;

[0052] The wireless communication module is used to connect to external devices to achieve remote control function;

[0053] The fault diagnosis module is used to detect abnormal conditions of the system and provide solutions;

[0054] The user interaction module is used to receive user instructions and feed back adjustment results.

[0055] In this embodiment, preferably, the step of detecting the tilt angle of the projector in the tilt detection module includes:

[0056] S1. Initialization: Initialize the accelerometer and gyroscope, set the appropriate sampling rate and resolution, perform zero calibration on the accelerometer, and eliminate bias errors;

[0057] S2. Data collection: collect three-axis acceleration data through the accelerometer and collect three-axis angular velocity data through the gyroscope;

[0058] S3. Static tilt angle calculation: Calculate the static tilt angle using accelerometer data;

[0059] S4. Dynamic tilt angle fusion: Based on the principle that the accelerometer will be affected by linear acceleration under dynamic conditions, a complementary filter is used to fuse the accelerometer and gyroscope data;

[0060] S5. Angle correction: Correct the gyroscope data by comparing the difference between the accelerometer and gyroscope data;

[0061] S6. Output result: output the finally calculated tilt angle to the adjustment control module to adjust the tilt angle of the projector.

[0062] In this embodiment, preferably, the static tilt angle calculation in S3 specifically includes the following formula:

[0063] X-axis tilt angle:

[0064]

[0065] Y-axis tilt angle:

[0066]

[0067] Among them, a x 、a y and a z Represents the acceleration values ​​of the X, Y, and Z axes respectively.

[0068] In this embodiment, preferably, the formula for fusing the accelerometer and gyroscope data using a complementary filter in the S4 dynamic tilt angle fusion includes:

[0069] θ fused =(1-α)θ gyro +αθ accel ;

[0070] Among them, θ fused is the tilt angle after fusion, θ gyro is the tilt angle calculated based on the gyroscope alone, θ accel is the tilt angle calculated based on the accelerometer alone, and α is the fusion coefficient, usually between 0.01 and 0.1.

[0071] In this embodiment, preferably, the gyroscope assists the accelerometer to improve the accuracy of tilt angle detection by using a gyroscope angular velocity integral formula, and the specific formula is as follows:

[0072] θ gyro (t) = θ gyro (t-1)+ω(t)·Δt;

[0073] Among them, θ gyro (t) is the tilt angle at the current moment t; θ gyro (t-1) is the tilt angle at the previous moment t-1; ω(t) is the angular velocity at the current moment; Δt is the sampling interval.

[0074] In this embodiment, preferably, the image processing module includes an image preprocessing unit, a trapezoidal distortion detection unit and a distortion parameter calculation unit. The image preprocessing unit is used to perform denoising and contrast enhancement operations on the collected picture data to improve image quality. The trapezoidal distortion detection unit is used to identify the parameters of the trapezoidal distortion through an image processing algorithm. The distortion parameter calculation unit is used to calculate the angle value that needs to be adjusted based on the detected trapezoidal distortion.

[0075] In this embodiment, preferably, the positioning module includes an ultrasonic sensor, an infrared sensor and a laser rangefinder. The ultrasonic sensor is used to measure the distance between the projector and the wall to help determine the optimal projection position. The infrared sensor is used to assist the ultrasonic sensor to improve the accuracy of distance measurement. The laser rangefinder is used to provide higher precision distance measurement.

[0076] In this embodiment, preferably, the adjustment control module includes a servo motor, a control circuit and a feedback system, the servo motor is used to drive the tilt adjustment mechanism of the projector, the control circuit is used to receive information from the image processing module and control the rotation angle of the servo motor, and the feedback system is used to monitor the movement state of the servo motor in real time to ensure the adjustment accuracy.

[0077] In this embodiment, preferably, the environmental perception module includes an ambient light sensor and a sound sensor. The ambient light sensor is used to detect the light intensity of the surrounding environment and adjust the brightness of the projector. The sound sensor is used to monitor the environmental noise and work with the image processing module to improve the accuracy of speech recognition. The wireless communication module includes a Wi-Fi / Bluetooth chip and a mobile network interface. The Wi-Fi / Bluetooth chip is used for wireless network connection to realize remote control of the projector. The mobile network interface is used to communicate with the cloud server through the 4G / 5G network to obtain updates or remote technical support.

[0078] In this embodiment, preferably, the fault diagnosis module includes a hardware self-check unit, a software self-check unit and a remote maintenance unit. The hardware self-check unit is used to regularly check the status of system hardware, such as motors and sensors; the software self-check unit is used to regularly run software diagnostic programs to ensure the normal operation of the software; the remote maintenance unit is used to connect to the cloud server through the wireless communication module to perform remote troubleshooting and repair; the user interaction module includes a touch screen, a voice recognition unit and a remote control. The touch screen is used to display the status information of the projector and receive user instructions. The voice recognition unit is used to perform voice commands to achieve voice control. The remote control is used to provide physical buttons to facilitate remote operation.

[0079] Principles and advantages of the present invention:

[0080] The present invention sets an image acquisition module, a tilt detection module, a positioning module and an adjustment control module, adopts a high-precision sensor and an image processing algorithm, can automatically detect the tilt angle of the projector, make corresponding adjustments, ensure the adjustment accuracy, and improve the projection quality; by setting an environment perception module, it can perceive the light intensity and sound of the surrounding environment so as to adjust the brightness of the projector and improve the accuracy of voice recognition; by setting a fault diagnosis module, it can detect abnormal conditions of the system, and timely discover and repair software problems, thereby ensuring the normal operation of the system; by setting a user interaction module, the user can easily operate through a touch screen, voice or remote control without manual adjustment; in addition, by setting an image processing module, it can improve the viewing experience of the projected picture and reduce the discomfort caused by trapezoidal distortion.

[0081] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent projector tilt angle adaptive system, characterized by: It includes image acquisition module, tilt detection module, image processing module, positioning module, adjustment control module, environment perception module, wireless communication module, fault diagnosis module and user interaction module. The image acquisition module includes a camera and an image sensor. The camera is installed in front of the projector and is used to acquire the projection image in real time. The image sensor is used to convert the acquired optical signal into an electrical signal. The tilt detection module includes an accelerometer and a gyroscope, wherein the accelerometer is used to detect the tilt angle of the projector, and the gyroscope is used to assist the accelerometer to improve the accuracy of tilt angle detection; The image processing module is used to analyze the images captured by the image acquisition module and calculate the trapezoidal distortion parameters; The positioning module is used to automatically identify the position of the projector and adjust the projection direction; The adjustment control module is used to automatically adjust the tilt angle of the projector according to the information of the tilt detection module and the image processing module; The environment sensing module is in communication connection with the image acquisition module, and is used to sense the light intensity and sound of the surrounding environment to optimize the projection effect; The wireless communication module is used to connect to external devices to achieve remote control function; The fault diagnosis module is used to detect abnormal conditions of the system and provide solutions; The user interaction module is used to receive user instructions and feed back adjustment results.

2. The intelligent projector tilt angle adaptive system according to claim 1, characterized in that: The step of detecting the tilt angle of the projector in the tilt detection module includes: S1. Initialization: Initialize the accelerometer and gyroscope, set the appropriate sampling rate and resolution, perform zero calibration on the accelerometer, and eliminate bias errors; S2. Data collection: collect three-axis acceleration data through the accelerometer and collect three-axis angular velocity data through the gyroscope; S3. Static tilt angle calculation: Calculate the static tilt angle using accelerometer data; S4. Dynamic tilt angle fusion: Based on the principle that the accelerometer will be affected by linear acceleration under dynamic conditions, a complementary filter is used to fuse the accelerometer and gyroscope data; S5. Angle correction: Correct the gyroscope data by comparing the difference between the accelerometer and gyroscope data; S6. Output result: output the finally calculated tilt angle to the adjustment control module to adjust the tilt angle of the projector.

3. The intelligent projector tilt angle adaptive system according to claim 2, characterized in that: The static tilt angle calculation in S3 specifically includes the following formula: X-axis tilt angle: Y-axis tilt angle: Among them, a x 、a y and a z Represents the acceleration values ​​of the X, Y, and Z axes respectively.

4. The intelligent projector tilt angle adaptive system according to claim 3, characterized in that: The S4 dynamic tilt angle fusion uses a complementary filter to fuse the accelerometer and gyroscope data. include: i fused =(1-α)θ gyro +ath accel ; Among them, θ fused is the tilt angle after fusion, θ gyro is the tilt angle calculated based on the gyroscope alone, θ accel is the tilt angle calculated based on the accelerometer alone, and α is the fusion coefficient, usually between 0.01 and 0.

1.

5. The intelligent projector tilt angle adaptive system according to claim 1, characterized in that: The gyroscope assists the accelerometer to improve the accuracy of tilt angle detection by using the gyroscope angular velocity integration formula, which is as follows: i gyro (t)=θ gyro (t-1)+ω(t)·Δt; Among them, θ gyro (t) is the tilt angle at the current moment t; θ gyro (t-1) is the tilt angle at the previous moment t-1; ω(t) is the angular velocity at the current moment; Δt is the sampling interval.

6. The intelligent projector tilt angle adaptive system according to claim 1, characterized in that: The image processing module includes an image preprocessing unit, a trapezoidal distortion detection unit and a distortion parameter calculation unit. The image preprocessing unit is used to perform denoising and contrast enhancement operations on the collected picture data to improve the image quality. The trapezoidal distortion detection unit is used to identify the parameters of the trapezoidal distortion through an image processing algorithm. The distortion parameter calculation unit is used to calculate the angle value that needs to be adjusted according to the detected trapezoidal distortion.

7. The intelligent projector tilt angle adaptive system according to claim 1, characterized in that: The positioning module includes an ultrasonic sensor, an infrared sensor and a laser rangefinder. The ultrasonic sensor is used to measure the distance between the projector and the wall to help determine the optimal projection position. The infrared sensor is used to assist the ultrasonic sensor to improve the accuracy of distance measurement. The laser rangefinder is used to provide higher-precision distance measurement.

8. The intelligent projector tilt angle adaptive system according to claim 1, characterized in that: The adjustment control module includes a servo motor, a control circuit and a feedback system. The servo motor is used to drive the tilt adjustment mechanism of the projector. The control circuit is used to receive information from the image processing module and control the rotation angle of the servo motor. The feedback system is used to monitor the movement state of the servo motor in real time to ensure the adjustment accuracy.

9. The intelligent projector tilt angle adaptive system according to claim 1, characterized in that: The environmental perception module includes an ambient light sensor and a sound sensor. The ambient light sensor is used to detect the light intensity of the surrounding environment and adjust the brightness of the projector. The sound sensor is used to monitor the environmental noise and work with the image processing module to improve the accuracy of speech recognition. The wireless communication module includes a Wi-Fi / Bluetooth chip and a mobile network interface. The Wi-Fi / Bluetooth chip is used for wireless network connection to realize remote control of the projector. The mobile network interface is used to communicate with the cloud server through the 4G / 5G network to obtain updates or remote technical support.

10. The intelligent projector tilt angle adaptive system according to claim 1, characterized in that: The fault diagnosis module includes a hardware self-check unit, a software self-check unit and a remote maintenance unit. The hardware self-check unit is used to regularly check the status of system hardware, such as motors and sensors; the software self-check unit is used to regularly run software diagnostic programs to ensure the normal operation of the software; the remote maintenance unit is used to connect to the cloud server through the wireless communication module to perform remote troubleshooting and repair; the user interaction module includes a touch screen, a voice recognition unit and a remote control. The touch screen is used to display the status information of the projector and receive user instructions. The voice recognition unit is used to perform voice commands and realize voice control. The remote control is used to provide physical buttons to facilitate remote operation.

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