CN109976267B - Intelligent education housekeeper device - Google Patents
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Abstract
The present disclosure relates to an intelligent education housekeeper device, including: the signal processing unit, signal input management unit, signal output management unit, external regulation management unit and serial program control interface are connected to the signal processing unit, signal output management unit includes: the signal input management unit comprises a video control subunit and an audio control subunit. The invention has the advantages that: the intelligent education management system has the advantages of simple structure, adoption of a modular design programming technology, convenience for extension and secondary development, no complex wiring and no complex debugging, and is reliable in control and high in cost performance due to the fact that intelligent education management is solved by one machine.
Description
Technical Field
The invention relates to an intelligent education housekeeper device.
Background
With the development of a new industrial revolution such as digitalization, networking, intellectualization and the like, the educational intelligent control product is more and more widely applied, not only brings agility and convenience to daily learning of students (or students), but also relieves the working pressure of teachers, and meanwhile, can integrate educational dominant resources and can be widely applied to numerous industries such as schools, training institutions, intelligent conference systems and the like.
At present, the structure of an intelligent control product for domestic and foreign education mainly aims at single function or local control as a core, partial intelligent control is realized, a special teaching central control machine, a 4 x 1 composite video switcher and the like need to be configured, the system is single in use mode, poor in compatibility, difficult to upgrade, incapable of controlling audio equipment and other extension equipment (such as a power supply controller, a matrix and the like), poor in anti-interference capability, and large in size and high in cost due to the fact that a stacking mode is adopted for occasions with a large number of control targets.
Disclosure of Invention
The invention aims to provide an intelligent education housekeeper device which is simple in structure and reliable in control.
In order to solve the technical problems, the invention adopts the technical scheme that: an intelligent education housekeeper device, comprising: the signal processing unit, signal input management unit, signal output management unit, external regulation management unit and serial program control interface are connected to the signal processing unit, signal output management unit includes: the signal input management unit comprises a video control subunit and an audio control subunit.
Compared with the prior art, the invention has the following beneficial technical effects:
simple structure includes: the signal processing unit, signal input management unit, signal output management unit, external regulation management unit and serial program control interface are connected to the signal processing unit, signal output management unit includes: the signal input management unit comprises a video control subunit and an audio control subunit. The weak control strong comprehensive wiring technology, the non-frequency division design phase characteristic technology and the full-digital electric regulation technology weaken the physiological harm and the influence of strong electromagnetic field radiation on human bodies, are green and environment-friendly, and have strong anti-interference capability; the control and compatibility problems of the complex process of the central control system are solved by using the emerging technologies such as modern control theory, artificial intelligence, expert experience, neural network, evolutionary algorithm and computer science; the high-performance control technology is adopted to meet the control requirements of a central control system on high speed, high sampling precision and high reliability, and the real-time performance and the accuracy of the intelligent control system are realized; multipoint interaction control and bidirectional communication can be realized by adopting a multipoint interaction and bidirectional control technology, an advanced language control technology and a unique two-wire centralized control technology interface; by adopting a modular design programming technology, the system is convenient to expand and develop secondarily, complex wiring and complex debugging are avoided, local sound amplification and public broadcasting are realized by one machine, and the cost performance is higher.
Drawings
FIG. 1 is a schematic structural diagram of an intelligent educational housekeeping apparatus of the present invention;
FIG. 2 is a schematic diagram of the external reconciliation management unit of the present invention;
FIG. 3 is a schematic diagram of the infrared remote control subunit of the present invention;
FIG. 4 is a schematic diagram of the multi-sensor control subunit configuration of the present invention;
FIG. 5 is a schematic diagram of a video control subunit of the present invention;
fig. 6 is a schematic diagram of the video Web server architecture of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but these examples are only illustrative and do not limit the scope of the present invention.
Referring to fig. 1, an intelligent education housekeeping device of the present invention includes: the signal processing unit, signal input management unit, signal output management unit, external regulation management unit and serial program control interface are connected to the signal processing unit, signal output management unit includes: the signal input management unit comprises a video control subunit and an audio control subunit.
In one embodiment, the signal processing unit includes: the power supply module, the USB communication unit, the configuration memory, the crystal oscillator, the voltage conversion circuit and the expansion connector are respectively connected to the FPGA processor, the USB communication unit is connected to a USB bus, the power supply module is connected to a +5V power supply and provides 3.3V, 2.5V and 1.2V voltages for the FPGA processor in three paths, the power supply module also provides 1.8V voltage for the configuration memory connection and provides 3.3V voltage for the crystal oscillator connection, the FPGA processor, the voltage conversion circuit and the expansion connector are communicated to form 3.3V TTL signals, and the crystal oscillator outputs 50MHz clock signals to the FPGA processor.
In one embodiment, referring to fig. 2, the external regulation management unit includes: the FPGA control module is connected with the ARM module, the SRAM storage module and the D/A conversion module.
In one embodiment, the FPGA control module comprises: the system comprises an SRAM controller, a VGA controller and a phase-locked loop PLL;
the ARM module is used for obtaining image data through remote communication between the RS485 bus and an upper computer, then analyzing an image command, and calling a function program stored in the F1ash in advance to obtain the image data;
the FPGA control module is used for storing and displaying image data, wherein the phase-locked loop PLL is responsible for managing an internal clock of the FPGA and outputting a required clock after frequency multiplication or frequency division;
the SRAM controller is used for completing read-write operation on the SRAM, storing the data sent by the ARM module into the SRAM storage module and reading the data from the SRAM storage module;
the VGA controller is used for generating an address for VGA display and a driving time sequence for VGA normal operation, the SRAM controller reads image data according to the address for reading the SRAM, and outputs the read data to the D/A conversion module for VGA display;
the SRAM storage module is used for writing and reading image data;
and the D/A conversion module is used for performing digital-to-analog conversion on the image data, providing a VGA packaging interface for the outside, and sending the analog data and the driving time sequence to the VGA display together to realize VGA display.
In one embodiment, referring to fig. 3, the infrared remote control subunit includes two parts: the transmitting part comprises a keyboard/remote controller, a coding modulation circuit and an infrared transmitting module; the receiving part adopts an integrated infrared receiving head HS0038, high level is output when an infrared signal is received, otherwise, low level is output, the receiving, the amplification, the detection and the shaping of a modulation signal are realized to TTL waveform, and the obtained coded pulse is transmitted to a signal processing unit to complete the demodulation and the control.
In an embodiment, referring to fig. 4, the multi-sensor control subunit is configured to control access and exit of each sensor node, analyze data of the sensor node, and transmit an analysis result to an Android client through a TD-LTE network, or locally display a result of the analysis, where the Android client is installed on a mobile phone of a user and receives monitoring information sent by the signal processing unit, and at the same time, the user also controls the Android client, and control information of the user is transmitted to the signal processing unit through the TD-LTE network first, and then is transmitted to the intelligent terminal through the intelligent gateway.
In one embodiment, referring to fig. 5, the video control subunit includes: and the video Web server is connected with the video monitoring terminal.
In one embodiment, the video monitoring terminal includes: the mobile terminals such as mobile phones, tablet PCs and the like, and also fixed terminals such as PCs and the like, adopt a wired or wireless mode to carry out video monitoring.
In one embodiment, referring to fig. 6, the video Web server includes: the ARMll processor is connected with the NANDPash, the SDRAM, the RTC circuit, the reset circuit, the USB camera and the DM 9000.
In one embodiment, the audio control subunit includes: an adjustable digital feedback suppression circuit.
As a specific embodiment, the intelligent education housekeeping device of the present invention, based on the intelligent education housekeeping product of wireless internet of things, uses technologies such as environment sensing, detection, positioning, human-computer interaction to realize centralized processing and remote control of education resources, and includes:
in one embodiment, the power supply system of the invention utilizes mature switching power supply technology, a classical bridge rectifier circuit and industrial-grade devices, has the power supply conversion efficiency as high as 94%, and has stable outputs (5 +/-0.3) V, (12 +/-0.5) V and (15 +/-0.5) V, and mainly provides stable power supply for the core control assembly.
As a specific embodiment, the control mainboard system of the present invention combines functions of a multi-channel digital audio processor, a digital U-segment automatic pair digital wireless microphone, an air mouse with a laser pen, a howling-preventing digital frequency shifter, a high-power digital power amplifier, a digital reverberator, a 4 × 2+1 channel high-definition mixed-insertion matrix (module-selectable), programmable network central control, IP network broadcasting (module-selectable), projection screen elevation control, a projector power supply controller, etc. into a whole through an intelligent means, and has high integration, full digital and high intelligence.
As a specific embodiment, the signal processing unit of the invention adopts a modularized and modularized signal processor platform, which comprises a power supply module, a USB communication unit, an FPGA processor, a configuration memory, a crystal oscillator, a voltage conversion circuit, an expansion connector and the like, the power module, the USB communication unit, the configuration memory, the crystal oscillator, the voltage conversion circuit and the expansion connector are respectively connected to the FPGA processor, the USB communication unit is connected to the USB bus, the power module is connected to the +5V power supply, and provides 3.3V, 2.5V and 1.2V voltage for the FPGA processor in three paths, the power supply module also provides 1.8V voltage for the configuration memory connection, and 3.3V voltage is provided for the connection of the crystal oscillator, the communication among the FPGA processor, the voltage conversion circuit and the extension connector is 3.3V TTL signals, and the crystal oscillator outputs 50MHz clock signals to the FPGA processor. The component is suitable for the aspect of large-scale scientific calculation or logic control capability application, better expansibility, adaptability and flexibility of a signal processing circuit are effectively ensured, and high practical value is realized.
As a specific embodiment, the external regulation management unit of the present invention includes: the system comprises an ARM module, an FPGA control module, an SRAM storage module and a D/A conversion module. The RM module is in remote communication with the upper computer through an RS485 bus to obtain image data, the image data can be obtained in two modes, the image data sent by the upper computer can be directly received, the image command sent by the upper computer can also be received, then the image command is analyzed, and a function program stored in the F1ash in advance is called, such as drawing a graphical interface or displaying a specific image, so that the image data is obtained. The FPGA control module is mainly responsible for storing and displaying image data, wherein the phase-locked loop PLI is responsible for managing an internal clock of the FPGA and outputting the required clock after frequency multiplication or frequency division. The SRAM controller completes the read-write operation of the SRAM, stores the data sent by the ARM into the SRAM, and reads the data from the SRAM at the same time, so that the normal display of the VGA is met. The VGA controller mainly generates addresses for VGA display (simultaneously, addresses for reading the SRAM) and driving time sequence for VGA normal operation, the SRAM controller reads image data according to the addresses for reading the SRAM, and outputs the read data to the D/A conversion module, and then VGA display is carried out. The SRAM memory module is used as a memory unit of image data and is responsible for writing and reading data. The D/A conversion module mainly performs digital-to-analog conversion on the image data, provides a VGA packaging interface for the outside, and transmits the analog data and the driving time sequence to the VGA display together to realize VGA display. When the system works, the ARM writes image data into the SRAM to complete data refreshing, and meanwhile, the VGA controller reads the image data from the SRAM to perform VGA display.
As a specific embodiment, the infrared remote control of the invention mainly comprises a transmitting part and a receiving part: the transmitting part comprises a keyboard/remote controller, code modulation and infrared transmission, the control unit continuously detects signals of the keyboard/remote controller, and the infrared diode transmits the signals; the receiving part mainly adopts an integrated infrared receiving head HS0038 (receiving 38kHz infrared signals and converting optical signals into electric signals), and when receiving the infrared signals, the receiving part outputs high level, otherwise, the receiving part outputs low level, so that the receiving, the amplification, the detection and the shaping of modulation signals are realized into TTL waveforms, and the obtained coded pulses are transmitted to a control unit to complete the demodulation and the control. The main circuit comprises a power supply circuit, a control circuit, an infrared transmitting circuit, an infrared receiving circuit and a single chip microcomputer minimum system circuit, wherein the power supply circuit converts 220V alternating current into +5V direct current to supply power for the single chip microcomputer and power supplies of other partial circuits (4 of the circuits are 1N4007 and serve as rectifier bridges, and 78LS05 is used for stabilizing voltage); the control circuit controls the on-off of the relay by using the triode so as to control the switch. The learning function is completed through the reset circuit.
As a specific embodiment, the invention also comprises an electrodeless lamp main circuit which generally comprises a rectification circuit, a PFC (power factor correction), a DC/AC and a load resonant network, wherein AC is 220V or 110V alternating current for people transmission; the DC/AC is an inversion part and converts direct-current voltage into high-frequency square waves; the load resonant network is used for energy transfer. Dimming of the electronic ballast can be done in both AC/DC (direct current side) or DC/AC (inverter side) parts. The dimming schemes of electronic ballasts for electrodeless lamps are mainly classified into two categories: direct current side dimming and inversion side dimming. The direct current unit dimming mainly comprises PWM chopping; the inversion unit mainly adjusts the light by frequency modulation and pulse uniform modulation.
As a specific embodiment, the multi-sensor control subunit of the present invention is responsible for managing the entire network, including access and exit of each sensor node, analyzing and processing the data thereof, and transmitting the analysis result to the Android client through the TD-LTE network, or displaying the result locally, where the Android client is installed on a mobile phone of a user and is capable of receiving monitoring information transmitted by a control center. Meanwhile, the user can also control the Android client, and control information of the Android client is firstly transmitted to the control center through the TD-LTE network and then transmitted to the intelligent terminal through the intelligent gateway. Environmental information such as temperature, humidity, audio and video, infrared information and the like can be obtained through detection of corresponding sensors, and are transmitted to the intelligent gateway through Zigbee wireless transmission and then transmitted to the intelligent control center.
As a specific embodiment, an ARM a 11-based integrated control platform adopts an ARMll processor S3C6410, NANDHash, SDRAM, RTC circuit, reset circuit, USB camera, DM9000, etc. to form a Video Web server, and S3C6410 is a high-performance low-power-consumption multimedia application processor based on an ARMl1 kernel, and has a powerful hardware MFC (Multi-Format Video Codec), perfect functional modules, and an operating frequency up to 667MHz, which can meet the requirements of real-time Video signal processing. The USB camera collects original video data and transmits the original video data to the S3C6410 processor, and the S3C6410 processor compresses and codes the original video; intemet is accessed through DM9000, and a video stream is transmitted by adopting a TCP/IP protocol. The NAND Flash adopts a K9LBG08UOD chip with 4Gbyte, is mainly used for storing Linux kernel, a file system, application programs and the like, the SDRAM adopts a DDR memory with 256Mbyte, the transmission rate can reach 266MHz7), and LR-2000 is internally provided with a real network programmable intelligent central control and a 4 x 2+1 composite high-definition matrix with a long-line driving function. An extensible fully programmable touch keyboard. Can be expanded to 3 control panels according to requirements, and even can realize the control of a tablet computer or a mobile phone. The bidirectional programmable serial port can flexibly program and control all devices and directly control all device functions.
As a specific embodiment, a linux operating system software design technology forms an overall architecture of a server-side software monitoring system through a video Web server and a video monitoring terminal (such as a mobile phone APP) side; linux is solidified in the video Web server
As a specific embodiment, the monitoring terminal can implement real-time video monitoring, the monitoring terminal sends a request to the server to end the session, and the server closes the thread and releases the resource. The Yaffs2 is suitable for the embedded file system of the NAND Flash, has the advantages of high speed, short mounting time, small occupation on a memory and the like, and provides an API for directly accessing the file system for the embedded system. The video acquisition function is realized by calling the mmap () function to map the video acquisition equipment into the system memory, the traditional mode of directly reading user space equipment is replaced, a kernel buffer area is bypassed, the processing speed of video data is accelerated, and the real-time performance is improved. The MJPEG-streamer utilizes the hardware compression function of the network camera to process images, reduces the load of a CPU, and is particularly suitable for embedded equipment.
As a specific embodiment, a hardware-kernel driving system application technology is integrated and applied, and a nanokernel of a hardware-kernel provided by an intelligent central control system can meet the hardware real-time requirement of the system. The method adopts a double-kernel mechanism, is strong real-time extension of a Linux kernel, is a real-time development framework integrated in Linux, and can provide a user space application program with hard real-time performance irrelevant to an interface.
As a specific embodiment, the system has a network remote control function and supports online upgrading. A public broadcasting system with a bidirectional IP talkback function can be selected. Besides the common IP public broadcasting function, paging and talkback between a broadcasting room and a classroom, between a classroom and an office and between an office and an office can be realized. And the high-standard sound box power amplifier in the suit is utilized to amplify the sound, so that the tone quality is guaranteed.
As a specific embodiment, after power-on reset, the radio frequency module and the single chip microcomputer are initialized, then whether a transmitting key is pressed or not is checked, and then a transmitting program is called; if the host signal is received, the learned corresponding code is transmitted. If there is key interruption, it enters the learning subprogram to learn the code.
As a specific embodiment, the infrared head is mainly used for receiving signals sent by a remote controller during learning, amplifying, shaping and demodulating the signals, and directly inputting output signals of the infrared head into a CPU for algorithm processing. The CPU records the period T and the negative pulse width of each pulse of the waveform to form two digital sequences { T1, T2, T3 … … }, { W1, W2 and W3 … … }, and after the two digital sequences are processed by a statistical algorithm, relevant data of the signals are completely stored in a memory. Each remote control command is recorded as a record, which facilitates reproduction of the remote control signal. When the learning remote controller is required to remotely control the equipment, the corresponding key is pressed, the CPU reads the record of the corresponding key from the waveform data memory after receiving the key information, and outputs the record to the driver for amplification through the port of the CPU after adding 38KHz carrier modulation, thereby driving the infrared transmitting tube to remotely control the instruction.
As a specific example, the remote control code transmits the subroutine. The carrier synthesis of the remote control signal is implemented by software, with a timing interrupt of 0 to generate a 38kHz carrier signal. Reading codes, opening a timer interrupt 0, and carrying out zero clearing and self addition on the count. If the address is even, the delay off interrupts 0; if the address is odd, a pulse signal is transmitted, and the interrupt is turned on. The loop exits until the data ends. And outputting a 38kHz carrier signal to an infrared emission control pin, thereby realizing the pulse width modulation emission of the remote control signal.
As a specific embodiment, the learning subprogram adopts a method of key interruption triggering to enter the learning program, and simultaneously, a counter is used for timing the high level and the low level of a signal to acquire data and store the data. The preamble consists of a high level of around 9ms and a low level. The method for judging whether the preamble is the preamble comprises the following steps: and judging whether the initial high level is more than 5ms, if so, considering the high level as a lead code, storing the low level of the lead code, and then sequentially storing the collected coded signals. If the high level of the collected coding signal is more than 5ms, the coding is considered to be finished, 0 is set as a mark, and the learning subprogram is finished.
The radio module program first initializes the module and then checks whether data is received. And when the transmission instruction is received, transmitting the learned instruction, delaying for a period of time, and continuously checking whether the data is received. And if the set program is received, modifying the relevant data of the radio frequency module singlechip, and clearing the buffer area after the modification is finished.
As a specific embodiment, the audio control software interface is set, professional DSP audio control is adopted, and the voice quality is ensured to achieve the professional voice amplification standard setting and then the preset mode is saved, so that the calling can be simply completed by one key on the control panel.
As a specific example, music parameter debugging: the 7-segment digital parameter equalization adjustment can meet the equalization setting requirement on system sound; digital volume adjustment, including the proportion of music mixing to each output channel, can meet various application scenes (including the need of preventing loopback of audio distribution of a video conference); the professional compression/amplitude limiter protects the working safety of the sound box to the maximum extent; the audio input channel can be switched, and the broadcasting and fire fighting functions are realized. And the music automatic gain control function automatically reduces the volume of the music channel when the microphone speaks.
As a specific example, microphone parameter tuning: the 7-segment digital parameters are balanced, and the microphone effect can be adjusted; feedback inhibition: when sound feedback occurs, the three-gear adjustable digital feedback suppression circuit can immediately find and calculate the frequency and the attenuation quantity of the sound feedback, and quickly suppress sound; microphone phantom power supply: can provide 48V phantom power for the wired microphone.
As a specific embodiment, a 4 x 2+1 composite high-definition matrix with a long line driving function is adopted, arbitrary grouping setting is realized, the interactive control requirements of different users and different scenes are met, the full-programming touch keyboard can be expanded, 3 control panels can be expanded according to the requirements, and the application is wide.
As a specific embodiment, the digital-frequency-shift-based feedback suppression circuit technology is adopted, digital volume adjustment is realized, the ratio of music mixing to each output channel is included, various application scenes can be met, and the anti-interference capability is high.
As a specific embodiment, the invention designs an integrated control platform based on ARM A11, which has a powerful hardware MFC (Multi-Format video Codec), a perfect functional module and an operating frequency as high as 667MHz, and can meet the requirement of real-time video signal processing.
As a specific embodiment, the intelligent education housekeeper based on the wireless Internet of things realizes the functions of regional broadcasting, ringing on and off classes, classroom exercises, voice hearing examinations, campus addressing broadcasting and the like. The digital audio processing mode with the feedback suppression function and the digital reverberator is simple and easy to use, and safe and guaranteed due to the one-key mode calling.
The audio control subunit of the invention has the advantages that: a professional sound console-level microphone preamplification circuit ensures full and clear sound. The classroom of many rooms uses simultaneously, can not produce and cross talk, does not have external connecting wire, and is reliable and stable long-lived. The factory presets fool mode, and can flexibly realize complex functions according to the field programming of customer requirements. Can control all internal functions and peripheral equipment to realize real one-key operation. The two-way talkback function, a machine solves all the requirements of local public address and public broadcasting. The system has no complicated wiring and no complex debugging, and can also realize excellent functions and effects. The modular design programming technology is adopted, so that the system is convenient to expand and develop secondarily, can be customized according to different users, selects configuration suitable for the user, elaborately sets programs meeting the user, and realizes artificial intelligence of the system.
The invention achieves the following beneficial technical effects:
simple structure includes: the signal processing unit, signal input management unit, signal output management unit, external regulation management unit and serial program control interface are connected to the signal processing unit, signal output management unit includes: the signal input management unit comprises a video control subunit and an audio control subunit. The weak control strong comprehensive wiring technology, the non-frequency division design phase characteristic technology and the full-digital electric regulation technology weaken the physiological harm and the influence of strong electromagnetic field radiation on human bodies, are green and environment-friendly, and have strong anti-interference capability; the problems of complex process control and compatibility of a central control system are solved by using new technologies such as modern control theory, artificial intelligence, expert experience, neural network, evolutionary algorithm and computer science; the high-performance control technology is adopted to meet the control requirements of a central control system on high speed, high sampling precision and high reliability, and the real-time performance and the accuracy of the intelligent control system are realized; multipoint interactive control and bidirectional communication can be realized by adopting a multipoint interactive and bidirectional control technology, an advanced language control technology and a unique two-wire centralized control technology interface; by adopting a modular design programming technology, the system is convenient to expand and develop secondarily, complex wiring and complex debugging are avoided, local sound amplification and public broadcasting are realized by one machine, and the cost performance is higher.
While the invention has been described with reference to preferred embodiments, it is not intended to be limited thereto. It is obvious that not all embodiments need be, nor cannot be exhaustive here. Variations and modifications of the present invention can be made by those skilled in the art without departing from the spirit and scope of the present invention by using the design and content of the above disclosed embodiments, and therefore, any simple modification, parameter change and modification of the above embodiments based on the research essence of the present invention shall fall within the protection scope of the present invention.
Claims (1)
1. An intelligent education housekeeper device, comprising: the signal processing unit, signal input management unit, signal output management unit, external regulation management unit and serial program control interface are connected to the signal processing unit, signal output management unit includes: the signal input management unit comprises a video control subunit and an audio control subunit;
the signal processing unit includes: the power supply module, the USB communication unit, the configuration memory, the crystal oscillator, the voltage conversion circuit and the expansion connector are respectively connected to the FPGA processor, the USB communication unit is connected to a USB bus, the power supply module is connected to a +5V power supply and provides 3.3V, 2.5V and 1.2V voltages for the FPGA processor in three paths, the power supply module also provides 1.8V voltage for the configuration memory connection and provides 3.3V voltage for the crystal oscillator connection, the FPGA processor, the voltage conversion circuit and the expansion connector communicate with each other to form a 3.3V TTL signal, and the crystal oscillator outputs a 50MHz clock signal to the FPGA processor;
the external regulation management unit includes: the system comprises an ARM module, an FPGA control module, an SRAM storage module and a D/A conversion module, wherein the FPGA control module is connected with the ARM module, the SRAM storage module and the D/A conversion module; the FPGA control module comprises: the system comprises an SRAM controller, a VGA controller and a phase-locked loop PLL;
the ARM module is used for obtaining image data through remote communication between the RS485 bus and an upper computer, then analyzing an image command, and calling a function program stored in the F1ash in advance to obtain the image data;
the FPGA control module is used for storing and displaying image data, wherein the phase-locked loop PLL is responsible for managing an internal clock of the FPGA and outputting a required clock after frequency multiplication or frequency division;
the SRAM controller is used for completing read-write operation on the SRAM, storing the data sent by the ARM module into the SRAM storage module and reading the data from the SRAM storage module;
the VGA controller is used for generating an address for VGA display and a driving time sequence for VGA normal operation, the SRAM controller reads image data according to the address for reading the SRAM, and outputs the read data to the D/A conversion module for VGA display;
the SRAM storage module is used for writing and reading image data;
the D/A conversion module is used for performing digital-to-analog conversion on the image data, providing a VGA packaging interface for the outside, and sending the analog data and the driving time sequence to the VGA display together to realize VGA display;
the infrared remote control subunit comprises a transmitting part and a receiving part: the transmitting part comprises a keyboard/remote controller, a coding modulation circuit and an infrared transmitting module; the receiving part adopts an integrated infrared receiving head HS0038, when receiving an infrared signal, the receiving part outputs high level, otherwise, the receiving part outputs low level, the receiving, the amplifying, the detecting and the shaping of a modulation signal are realized into TTL waveform, the obtained coded pulse is transmitted to a signal processing unit to complete the demodulation, the infrared receiving head is controlled to be mainly used for learning, the signal sent by a remote controller is received, the signal is amplified, shaped and demodulated, the output signal is directly input into a CPU to be processed by an algorithm, the CPU records the period T and the negative pulse width of each pulse of the waveform, two digital sequences are formed, namely { T1, T2, T3 … … }, { W1, W2 and W3 … … }, after the processing of the statistical algorithm, the relevant data of the signal is completely stored in a memory, each remote control instruction is used as a record, when the equipment is required to be remotely controlled by the learning remote controller, a corresponding key is pressed, after receiving the key information, the CPU reads the record of the corresponding key from the waveform data memory, and outputs the record to a driver for amplification through a port of the CPU after adding 38KHz carrier wave for modulation, thereby driving the infrared transmitting tube to remotely control the instruction; remote control code emission subprogram, which realizes the carrier synthesis of remote control signals by software, generates a carrier signal of 38kHz by timing interruption, reads codes, opens the timing interruption, counts, clears and self-adds, and delays off interruption if the address is an even number; if the address is odd, a pulse signal is transmitted, interruption is opened until the data finishes exiting circulation, a 38kHz carrier signal is output to an infrared transmission control pin, a learning subprogram enters the learning program by adopting a method triggered by key interruption, and simultaneously, a counter is used for collecting and storing data by a method of timing high and low levels of the signal, a lead code consists of a high level and a low level which are about 9ms, and the method for judging whether the lead code is as follows: judging whether the starting high level is more than 5ms, if so, considering the high level as a lead code, storing the low level of the lead code, and then sequentially storing the acquired coding signals, if so, considering the coding to be finished, setting 0 as a mark, and finishing the learning subprogram;
the multi-sensor control subunit is used for controlling the access and exit of each sensor node, analyzing and processing the data of the sensor node, transmitting an analysis result to an Android client through a TD-LTE network, or displaying the result locally, wherein the Android client is installed on a mobile phone of a user, receiving monitoring information transmitted by the signal processing unit, and meanwhile, the user is also controlled through the Android client, and control information of the user is transmitted to the signal processing unit through the TD-LTE network and then transmitted to the intelligent terminal through the intelligent gateway;
the video control subunit comprises: the video Web server is connected with the video monitoring terminal; the video Web server includes: the ARMll processor is connected with the NANDPash, the SDRAM, the RTC circuit, the reset circuit, the USB camera and the DM9000 video Web server, a Linux system and an MJPEG-streamer application program are solidified in the ARMll processor, and a multi-thread mode is adopted to support multiple monitoring terminals to monitor simultaneously; the video monitoring terminal includes: the method comprises the following steps that a mobile phone and a tablet Personal Computer (PC) mobile terminal or a PC and other fixed terminals are used for carrying out video monitoring in a wired or wireless mode, Yaffs2 is used as an embedded file system suitable for NAND Flash, and a video acquisition function is realized by calling a mmap function to map video acquisition equipment into a system memory;
the audio control subunit includes: adjustable digital feedback suppression circuit, audio control software interface sets up, adopts professional DSP audio control, and the music parameter is debugged: 7 the balanced regulation of section digital parameter, digital volume control, including the music sound mixing to each output channel's proportion, the compression/amplitude limiter of specialty, but switching audio input channel takes broadcasting and fire control cut by force function, music automatic gain control function, microphone parameter debugging: and 7-segment digital parameter equalization and feedback suppression: three-gear adjustable digital feedback suppression circuit, microphone phantom power supply: the 48V phantom power supply is provided for a wired microphone, a 4 x 2+1 composite high-definition matrix with a long line driving function is adopted, a fully-programmed touch keyboard is expanded, 3 control panels are expanded according to requirements, and a digital frequency shift feedback suppression circuit technology is adopted.
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