CN101859481A - An intelligent wireless remote controller based on infrared video - Google Patents

Abstract

The invention belongs to the technical field of single-chip circuit design, and specifically discloses an intelligent wireless remote controller based on infrared video. It is mainly composed of a main controller, a user behavior capture device, and multiple infrared light sources (such as an infrared Led pen). The connection between the user behavior capture device and the main controller adopts Bluetooth wireless transmission. The front end of the capture device has an infrared CMOS camera lens. The interactive information of the main controller is calculated by the main controller, and then the corresponding control signal is sent to the corresponding control equipment. Compared with the traditional remote controller, the present invention has the advantages of extremely intelligent control, humanization, easy realization, low cost, identification of relatively complex user behaviors, and realization of various controls.

Description

An intelligent wireless remote controller based on infrared video

technical field

The invention belongs to the technical field of single-chip circuit design, and in particular relates to the design of an intelligent wireless remote controller based on infrared video.

Background technique

The rapid development of electronic technology and the continuous emergence of new large-scale remote control integrated circuits have made remote control technology develop rapidly. The central control part of the remote control device has gradually developed from early discrete components and integrated circuits to the current single-chip microcomputer, and the degree of intelligence has been greatly improved. In recent years, remote control technology has been widely used in industrial production, household appliances, security and people's daily life.

Electric common remote control circuits generally have the following types: voice control, light control, radio remote control, infrared remote control and so on.

1. Voice control method

Voice control is to use sound to control the action of the object. Generally, an electret microphone or piezoelectric ceramic is used as a sensing element to pick up the sound, and the electronic switch action of the subsequent stage is driven by circuit amplification. In order to prevent external audio interference, ultrasonic control can be used, but there are also those who deliberately use audio frequency for control, such as using the sound frequency of children to control the crying and laughing movements of voice-activated dolls.

2. Light control method

The simple single-channel light control circuit uses the internal resistance of the photosensitive tube to change after receiving light to change the state of the electronic switch. The sensor includes photodiodes, phototransistors, photoresistors, photosensitive cells, etc. After scraping off the black light-shielding paint on the outside, it is a good photosensitive tube.). The light source can be either visible light or invisible light such as infrared rays, and different photosensitive elements have different spectra. The more complex light control circuit can complete multi-channel switch or analog quantity change control, which is extremely widely used, and it can be said that every family has it. Because the remote controllers of household appliances such as televisions with remote controls, power amplifiers, VCD recorders, etc. are all typical examples of using infrared light sources for remote control. There are now many corridor lights in residential buildings that use a circuit that combines light control and sound control. The sound of footsteps, conversations, or other sounds from passing people is used to trigger the sound-activated electronic switch of the light. The lights automatically shut off during the day to stop responding.

3. Radio remote control method

The radio remote control circuit is much more complicated than the sound control or light control circuit, but the control distance is also longer. It can be as close as a few tenths of a meter, and as far as it can go beyond the earth to reach space! It consists of two parts, the transmitting circuit and the receiving circuit. When the receiver receives the radio waves from the transmitter, it drives the electronic switch circuit to work. So its transmitting frequency and receiving frequency must be exactly the same. According to the high-frequency waveforms it transmits, there are constant amplitude, amplitude modulation, frequency modulation, and digital pulse transmitters. According to the number of switches it controls, there are single-channel remote control and multi-channel remote control. The focus of the radio remote control circuit is anti-interference and stability issues, so many additional circuits may be set in the circuit for safety.

4. Infrared remote control mode

Infrared remote control is a remote control method that uses infrared rays as a carrier. Since the wavelength of infrared rays is much smaller than that of radio waves, when infrared remote control is used, it will not interfere with the normal operation of other electrical appliances, nor will it affect nearby radio equipment. At the same time, due to the low working voltage, low power consumption and simple peripheral circuits when using infrared remote control devices, it is more and more widely used in daily work and life.

Commonly used infrared remote control systems are generally divided into two parts: transmitting and receiving. The main components of the emitting part are infrared light emitting diodes. It is actually a special light-emitting diode; because its internal material is different from ordinary light-emitting diodes, when a certain voltage is applied to its two ends, it emits infrared rays instead of visible light. At present, the infrared wavelength emitted by a large number of infrared light-emitting diodes is about 940mm, and the shape is the same as that of ordinary φ5 light-emitting diodes, but the color is different. Infrared LEDs generally have three colors: black, dark blue, and transparent. The method of judging the quality of infrared light-emitting diodes is the same as that of ordinary diodes; use a multimeter to measure the forward and reverse resistance of infrared light-emitting diodes. The luminous efficiency of infrared light-emitting diodes can only be accurately measured with special instruments, and it can only be roughly judged by the sawing method under amateur conditions. The infrared receiving tube of the receiving part is a photosensitive diode. In practical applications, the infrared receiving diode must be reverse-biased so that it can work normally, that is, the infrared receiving diode is used in reverse when it is used in the circuit, so as to obtain higher sensitivity. Infrared light-emitting diodes generally have two types: round and square.

The characteristic of infrared remote control is that it does not affect the surrounding environment and does not interfere with other electrical equipment. Because it cannot penetrate the wall, household appliances in different rooms can use a universal remote control without mutual interference; the circuit debugging is simple, as long as the connection is correct according to the given circuit, generally it can be put into operation without any debugging; codec Easy to carry out multi-channel remote control. Because each manufacturer has produced a large amount of infrared remote control ASICs, it is only necessary to find out according to the diagram. Therefore, infrared remote control has been widely used in adding electrical appliances and indoor short-distance (less than 10 meters) remote control.

Contents of the invention

The purpose of the present invention is to propose an intelligent wireless remote controller that can identify relatively complicated user behaviors and realize various controls.

The basic structure of the intelligent wireless remote controller proposed by the present invention is shown in FIG. 1 . It is mainly composed of a main controller, a user behavior capture device, and an infrared light source (such as an infrared Led pen).

The connection between the user behavior capture device and the main controller adopts Bluetooth wireless transmission, and it is a space capture device that can point and aim precisely like a computer mouse. The front end of the capture device has an infrared CMOS camera lens. Although the user moves towards the user behavior capture device, in fact, the interaction information between the main controller and the user behavior capture device is calculated by the main controller and then sent to the corresponding control device. Send the corresponding control signal.

Compared with traditional remote controllers, the present invention has the advantages of:

(1) The control is extremely intelligent and humanized, and the requirements for the environment are not harsh. Even at night when the light is not good, the user only needs to do a few simple actions to realize the intelligent control of the corresponding equipment, which is convenient and quick.

(2) The present invention is easy to realize and has low cost. The infrared wavelength is greater than 700nm, which is invisible light. In order to enable our camera to only track infrared light and save costs, we only need to add an infrared filter to the CMOS lens to filter out visible light and only see infrared light of a certain wavelength. . This method is easy to implement, the cost is low, and it can achieve better results.

(3) It can identify more complex user behaviors and realize various controls. Although the angle and emission distance of infrared rays are limited, it can be monitored by multiple user behavior capture devices, so that the tracking range is wider and the effect is better. Even if it is not directly facing the device that needs to be controlled, as long as it can be captured by the user behavior capture device, the corresponding device can be easily controlled. Moreover, a user behavior tracker can track multiple infrared light points at the same time, so the effect of multi-point control can also be achieved.

Description of drawings

Fig. 1 basic structural diagram of the present invention.

Fig. 2 general flowchart of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with FIG. 1 .

The user behavior tracker can be placed in a position where it can completely and clearly monitor the user's behavior, and then be fixed. As long as there is an infrared-emitting LED pen, let the user action tracker track its light point, and the user action tracker will create a virtual absolute The screen with a resolution of 1024*768 determines the absolute position of the light spot, and then communicates with the main controller through Bluetooth wireless transmission, determines the running track of the light spot, and finally determines the user's behavior mode. A corresponding control device sends a corresponding control signal.

In order to achieve a wide tracking range, the present invention can use multiple user behavior catchers for monitoring;

In order to achieve the effect of multi-point control, the present invention can use multiple infrared light sources (such as LED pens) for behavior representation.

The specifications of the Led will affect the tracking effect of the user behavior capture device. In fact, the user behavior capture device only cares about brightness and wavelength, but the angle, range, current, and voltage of the Led will all affect the brightness. In general, we chose to use TSAL6400, which has the best performance.

In conjunction with Fig. 2, the specific execution steps of the present invention are as follows:

(1) Start the bluetooth receiver of the main controller, and prepare for information interaction with the user behavior capture device.

(2) Start the user behavior capture device, search for the Bluetooth signal of the main controller, and connect to the main controller successfully.

(3) The user uses the LED pen to express the control behavior within the range that the behavior catcher can completely and clearly monitor.

(4) During the process of the user holding the infrared light source to control the behavior (assuming that the infrared light source is an infrared Led pen), the user behavior capturer checks the position of the infrared light point of the infrared Led pen every very short time in a virtual absolute The screen with a resolution of 1024*768 is described, and it is wirelessly transmitted to the main controller through Bluetooth.

(5) After the expression of the user's control behavior ends, the user behavior catcher notifies the main controller of the information. The main controller accurately describes the behavior trajectory of the infrared light spot of the Led pen through the recorded information.

(6) The main controller accurately recognizes the corresponding behavior trajectory as some meaningful equipment control information through the identification program, and sends corresponding control signals to the corresponding equipment.

Claims (5)

1. intelligent wireless remote control based on infrared video, it is characterized in that: it mainly is made up of master controller, user behavior catcher and infrared light supply; Wherein, the line of described user behavior catcher and master controller adopts Bluetooth wireless transmission, the catcher front end has infrared C MOS pick-up lens, the user is facing to the action of user behavior catcher, interactive message between master controller and the user behavior catcher is sent corresponding control signal to control corresponding equipment again through the computing of master controller.

2. a kind of intelligent wireless remote control according to claim 1 based on infrared video, it is characterized in that: it is motionless that the user behavior catcher is placed on the stationkeeping that can completely clearly supervise user behavior, infrared light supply adopts the Led pen of infrared, allow the user behavior catcher follow the trail of its luminous point, the virtual absolute resolution of user behavior catcher reaches the screen of 1024*768, thereby determine the absolute position of luminous point, pass through Bluetooth wireless transmission then, carry out information interchange with master controller, determine the running orbit of luminous point, final decision user's behavior pattern is sent corresponding control signal by master controller to control corresponding equipment.

3. a kind of intelligent wireless remote control based on infrared video according to claim 2 is characterized in that adopting a plurality of user behavior catchers to monitor in order to reach with wide following range.

4. a kind of intelligent wireless remote control based on infrared video according to claim 3 is characterized in that adopting a plurality of Led pens to carry out behavior and representing in order to reach the effect of multiple spot control.

5. a kind of intelligent wireless remote control according to claim 1 based on infrared video, it is characterized in that: concrete execution in step is as follows:

(1) Bluetooth Receiver of startup master controller is prepared to carry out information interaction with the user behavior catcher;

(2) start the user behavior catcher, the bluetooth signal of search primary controller is connected with master controller;

(3) user uses the Led pen can completely to know within the scope that monitors at the behavior catcher, controls the expression of behavior;

(4) in the hand-held infrared light supply of user carries out process that the control behavior represents, the user behavior catcher is every the infrared light spot position of extremely short time to infrared Led pen, the screen that reaches 1024*768 at a virtual absolute resolution is described, and gives master controller with it by Bluetooth wireless transmission;

(5) after end is expressed in user's control behavior, the user behavior catcher is given master controller with information notification, and master controller is by the running orbit of Led the infrared light spot of information accurate description of record;

(6) master controller is by recognizer, the running orbit of correspondence accurately is identified as certain significant device control message, and corresponding apparatus is sent corresponding control signal.

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