CN210442653U - Intelligent classroom system - Google Patents
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- CN210442653U CN210442653U CN201920255885.8U CN201920255885U CN210442653U CN 210442653 U CN210442653 U CN 210442653U CN 201920255885 U CN201920255885 U CN 201920255885U CN 210442653 U CN210442653 U CN 210442653U
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Abstract
An intelligent classroom system comprises a main controller, a human-computer interaction end, a lighting control device, a window control device, a curtain control device and a people number detection device; the lighting control device comprises an LED fluorescent lamp driving module, a illuminance sensor, a plurality of LED fluorescent lamps and pyroelectric infrared sensors which correspond to the LED fluorescent lamps one by one; the window control device comprises a first stepping motor, a first motor driving module, a first micro-control unit, a sound sensor and a raindrop sensor; the curtain control device comprises a second stepping motor, a second motor driving module and a second micro-control unit. The utility model discloses an intensity of the outside environmental sound that hits of sound sensor detection classroom, the size that the rain sensor detected the rainfall realizes working as external noise influence on class and when heavy rain self-closing window, guarantees positive teaching quality, through wireless transmission module connects with radio frequency's mode, realizes the automatic control in whole classroom.
Description
Technical Field
The utility model relates to an automated control field, in particular to intelligence classroom system.
Background
With the expansion of college students in China, the total number of classrooms of all colleges and universities is continuously increased, diversified classroom equipment is created for the college classrooms due to the specific functions and requirements of the college classrooms, and how to manage the classroom equipment, the college equipment is more humanized, more energy-saving and more intelligent, and is important content for campus construction.
Currently, there are many proposals for classroom device management methods in succession, but most of them are for the management of a single type of device. The illumination in many classrooms adopts on-off control, and its to a great extent relies on people's initiative, can not real-timely adjust according to the external illumination condition, and the degree of close in classroom is very strong sometimes very weak, reads under the highlight or weak light condition for a long time and has injured eyes, and the mr goes to switch on and off lamp or (window) curtain when having a lesson, can break the lecture, influences the quality of giving a lesson. The classroom comes the noise outward in class-hour, and the teacher that is very concentrated on and classmates do not notice just can not close the window, and in essence and influence classroom environment, the teacher carelessly goes to close the window and can break the lecture again, influences and attends a lesson. In addition, under most conditions, the number of the turned-on lighting lamps in the classroom has an obvious non-corresponding relation with the number of people in the classroom, namely, the number of the turned-on lighting lamps is larger than the number of the turned-on lighting lamps meeting the lighting requirements of the corresponding number of people, and a large amount of electric energy is wasted. The attendance of a general class is checked by a teacher, so that the class time is wasted, and the efficiency is low. Most of course arrangement lists at the classroom door are made of paper, all courses in the whole school period are printed on a piece of paper, the courses are not very visual to check, and the courses are relatively troublesome to update.
Disclosure of Invention
The utility model aims to solve the technical problem that to prior art not enough, provide a reasonable in design, the function is more complete, the higher intelligent classroom system of degree of automation.
The utility model aims to solve the technical problem and is realized by the following technical proposal, the utility model is an intelligent classroom system which is characterized in that the intelligent classroom system comprises a main controller, a man-machine interaction end, an illumination control device, a window control device, a curtain control device and a number detection device;
the man-machine interaction end comprises a mobile phone terminal and a display touch screen arranged outside a classroom door, the display touch screen is connected with the main controller, and the main controller is in communication connection with the educational administration server and the mobile phone terminal in a radio frequency mode through a wireless transmission module;
the lighting control device comprises an LED fluorescent lamp driving module, a illuminance sensor, a plurality of LED fluorescent lamps uniformly arranged on a ceiling of a classroom and pyroelectric infrared sensors which are arranged on the ceiling and correspond to the LED fluorescent lamps one by one, wherein the output end of the illuminance sensor and the output end of the pyroelectric infrared sensor are both connected with the input end of the main controller, the input end of the LED fluorescent lamp driving module is connected with the output end of the main controller, and the output end of the LED fluorescent lamp driving module is connected with the LED fluorescent lamps;
the window control device comprises a first stepping motor for controlling the opening and closing of a window, a first motor driving module, a first micro-control unit for providing a time sequence pulse signal for the first stepping motor, a sound sensor arranged on the outer wall of a classroom or one meter outside the window and a raindrop sensor arranged on the outer wall of the classroom, wherein the output end of the sound sensor and the output end of the raindrop sensor are respectively connected with the input end of a main controller, the output end of the main controller is connected with the input end of the first micro-control unit, the output end of the first micro-control unit is connected with the input end of the first motor driving module, and the output end of the first motor driving module is connected with the input end of the first stepping motor;
the curtain control device comprises a second stepping motor for controlling the opening and closing of the curtain, a second motor driving module and a second micro-control unit for providing a time sequence pulse signal for the second stepping motor, wherein the input end of the second micro-control unit is connected with the output end of the main controller, the output end of the second micro-control unit is connected with the input end of the second motor driving module, and the output end of the second motor driving module is connected with the input end of the second stepping motor;
the number detection device comprises two groups of photoelectric switches which are respectively arranged on a front door and a rear door of a classroom, wherein each group comprises two pairs, two pairs of photoelectric switches of each group are arranged at equal height positions on a door, one pair of photoelectric switches are arranged outside the door and the other pair of photoelectric switches are arranged in the door, the transmitting end and the receiving end of each pair of photoelectric switches are respectively arranged on two sides of the door, the transmitting ends of the two pairs of photoelectric switches are arranged on different sides, and the output ends of the photoelectric switches are connected with the input end of a main controller.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme, main control unit adopts STM32F103ZET6 singlechip.
The utility model discloses the technical problem that solve can also be realized through following technical scheme, the micro-control unit adopts AT89C2051 singlechip.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme, it is the LCD screen to show the touch-sensitive screen for man-machine interaction shows time, school timetable, corresponds number, the number of lacking in duty in real time.
Compared with the prior art, the utility model discloses beneficial effect does:
1) the strength of the sound of the external environment of the classroom is detected by the sound sensor and is transmitted to the main controller, the rainfall sensor detects the rainfall and transmits the rainfall to the main controller, the main controller processes and judges signals, and the judgment result is whether the window needs to be closed or not, so that the window is automatically closed when the external noise affects the class and heavy rain, and the teaching quality is ensured;
2) when any pyroelectric infrared sensor detects that a person enters a corresponding detection area, the main controller gradually lights the corresponding LED fluorescent lamp, the pulse width modulation technology is adopted to gradually light the corresponding LED fluorescent lamp to prevent glare, and when any pyroelectric infrared sensor detects that a person leaves the corresponding detection area, the main controller gradually extinguishes the corresponding LED fluorescent lamp; the illumination sensor detects the light intensity in the classroom and transmits the light intensity to the main controller, the main controller processes and judges signals, when the light in the classroom is weak, the main controller preferentially controls the curtain, opens the curtain to compensate illumination, and when the light is strong, the brightness of the fluorescent lamp is preferentially weakened; the damage to vision when the light is too weak and too strong is avoided, the illumination value of a classroom is kept at a standard value, and the waste of electric energy is reduced;
3) the mobile phone terminal and the educational administration server are connected through the wireless transmission module in a radio frequency mode, the main controller is connected with the wireless module, and the mobile phone terminal can manually control fluorescent lamps, windows and curtains in a classroom; the system is automatically closed when the photoelectric switch detects the number of people entering or leaving the classroom and no person exists in the classroom, the main controller acquires information from the educational administration server through the wireless transmission module, the main controller outputs the processed information to the display touch screen, and the linear touch screen displays classes, courses, corresponding number of people and absent number of people in class in real time.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic view of the installation of the people number detecting apparatus.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings so as to facilitate the further understanding of the present invention by those skilled in the art, and do not constitute a limitation to the right thereof.
Embodiment 1, referring to fig. 1, an intelligent classroom system includes a main controller, a human-computer interaction terminal, a lighting control device, a window control device, a curtain control device, and a people number detection device, wherein the main controller includes a microprocessor 11;
the human-computer interaction end comprises a mobile phone terminal 24, a educational administration server 22 and a display touch screen 21 arranged outside a classroom door, wherein the display touch screen 21 is connected with the main controller, and the educational administration server 22 and the mobile phone terminal 24 are connected with the main controller in a radio frequency mode through a wireless transmission module 23;
the lighting control device comprises an LED fluorescent lamp driving module, a illuminance sensor 31, a plurality of LED fluorescent lamps 33 uniformly arranged on the ceiling of a classroom and pyroelectric infrared sensors 32 which are arranged on the ceiling and correspond to the LED fluorescent lamps 33 one by one, wherein the output end of the illuminance sensor 31 and the output end of the pyroelectric infrared sensors 32 are connected with the input end of the main controller, the input end of the LED fluorescent lamp driving module is connected with the output end of the main controller, and the output end of the LED fluorescent lamp driving module is connected with the LED fluorescent lamps 33;
the window control device comprises a first stepping motor 44 for controlling the opening and closing of a window, a first motor driving module, a first micro-control unit 43 for providing a time sequence pulse signal for the first stepping motor 44, a sound sensor 41 arranged on the outer wall of a classroom or one meter outside the window, and a raindrop sensor 42 arranged on the outer wall of the classroom, wherein the output end of the sound sensor 41 and the output end of the raindrop sensor 42 are respectively connected with the input end of a main controller, the output end of the main controller is connected with the input end of the first micro-control unit 43, the output end of the first micro-control unit 43 is connected with the input end of the first motor driving module, and the output end of the first motor driving module is connected with the input end of the first stepping motor 44;
the curtain control device comprises a second stepping motor 52 for controlling the opening and closing of the curtain, a second motor driving module and a second micro-control unit 51 for providing a time sequence pulse signal for the second stepping motor 52, wherein the input end of the second micro-control unit 51 is connected with the output end of the main controller, the output end of the second micro-control unit 51 is connected with the input end of the second motor driving module, and the output end of the second motor driving module is connected with the input end of the second stepping motor 52;
the number detection device comprises two groups of photoelectric switches which are respectively arranged on a front door and a rear door of a classroom, wherein each group comprises two pairs, the two pairs of photoelectric switches of each group are arranged at equal height positions of the door, one pair of photoelectric switches are arranged outside the door and the other pair of photoelectric switches are arranged inside the door, the transmitting end and the receiving end of each pair of photoelectric switches are respectively arranged on two sides of the door, the transmitting ends of the two pairs of photoelectric switches are arranged on different sides, and the output ends of the photoelectric switches are connected with the input end of a main controller.
In the intelligent classroom system described in embodiment 2 and embodiment 1, the main controller uses an STM32F103ZET6 single chip microcomputer, and the micro control unit uses an AT89C2051 single chip microcomputer.
In the intelligent classroom system described in embodiment 3 or 1, the display touch screen is a liquid crystal display screen and is used for man-machine interaction, and displaying time, a school timetable, the number of people on demand and the number of people on absence in real time.
Referring to fig. 2, in the embodiment of the present invention, it should be noted that the number detection device is two sets of correlation type infrared pair tubes, the door-entering photoelectric switch includes an infrared transmitting tube 611 and an infrared receiving tube 612, the door-exiting photoelectric switch includes an infrared transmitting tube 621 and an infrared receiving tube 622, and the output ends of the infrared receiving tube 612 and the infrared receiving tube 622 are connected to the microprocessor. Two infrared emission tubes are arranged on different sides of the door, so that the accuracy is improved, and a restraint device is not required. Because the infrared ray signal that infrared emission pipe sent has the diffusion angle, if two transmitting tubes were adorned in the homonymy of door, when blocking the light path of a pair of photogate, the infrared receiving tube that is blocked still can receive the infrared ray that the infrared emission pipe of another pair of photogate sent, and is inaccurate.
The embodiment of the utility model provides an in, wireless transmission module 23 adopts the WIFI module, it adopts the liquid crystal touch screen module to show touch-sensitive screen 21. When the system is in operation, the wireless transmission module 23 is used for receiving and transmitting signals, acquiring information from the educational administration server 22, transmitting the received information to the microprocessor 11, processing the information by the microprocessor 11 and transmitting the information to the display touch screen 21, the display touch screen 21 displaying information such as current time, class, number of people absent from work, course and the like on the main page, and students can click the touch screen to enter the second page to check information such as detailed class schedules and teaching notices. A mobile application program is developed on the mobile phone terminal 24, and the mobile application program interface can be accessed to view all information which can be displayed on the display touch screen 21, the state of each device in the classroom, such as the opening and closing state of a window, and the ratio of the actual power to the maximum power of the LED fluorescent lamp. In addition, the opening and closing of each window, curtain and fluorescent lamp can be independently controlled on the mobile phone, the brightness of the LED fluorescent lamp can be adjusted in a mode that the microprocessor 11 outputs PWM waves, and then the LED fluorescent lamp is driven through the driving circuit;
in the embodiment of the present invention, pyroelectric infrared sensor 32 be human infrared sensor, illuminance sensor 31 be photodiode, when using, arbitrary pyroelectric infrared sensor 32 outputs the low level when detecting someone gets into corresponding detection area, when microprocessor 11 detects the low level of outer sensor 32 output, can light corresponding LED fluorescent lamp 33 gradually, adopts pulse width modulation technique lights gradually and prevents the glare. When any pyroelectric infrared sensor 32 detects that a person leaves the corresponding detection area, the microprocessor 11 gradually turns off the corresponding LED fluorescent lamp 33 in the opposite condition. The illuminance sensor 31 detects illuminance in the classroom and transmits the illuminance to the microprocessor 11, and the microprocessor 11 performs signal processing and judgment. When the light of the classroom is weak, the microprocessor 11 controls the curtain preferentially, opens the curtain and compensates the light. When the light is strong, the brightness of the LED fluorescent lamp 33 is preferentially reduced. The damage to vision when the light is too weak and too strong is avoided, the illumination value of a classroom is kept at a standard value, the vision is protected, and the waste of electric energy is reduced.
In the embodiment of the present invention, it should be explained that what the dimming technology adopted is the pulse width modulation technology, for example, 16-bit digital output type ambient light intensity sensor integrated circuit BH1750FVI, this integrated circuit BH1750FVI is a digital light intensity sensor integrated circuit for two-wire serial bus interface, and this kind of integrated circuit can adjust the luminance of liquid crystal or keyboard background light according to the collected light intensity data, and the high resolution thereof can detect the light intensity change in a larger range.
In the embodiment of the present invention, the sound sensor 41 is a decibel sensor, when in use, the sound sensor 41 detects the intensity of the environmental sound outside the classroom and transmits the intensity to the microprocessor 11, the raindrop sensor 42 detects the rainfall, the sound sensor 41 and the raindrop sensor 42 both output analog quantity, the microprocessor 11 processes and judges the received single analog quantity, the judgment result is whether the window needs to be closed, when the received analog quantity is greater than the set threshold value, the window is automatically closed, when the external noise affects the class and the heavy rain, the window is automatically closed, and the teaching quality is ensured;
in the embodiment of the utility model, microprocessor 11 be STM32F103ZET6 singlechip, micro-control unit 43 and micro-control unit 51 be AT89C2051 singlechip, AT89C2051 singlechip operating voltage is compatible with 3.3V series. The executing device for opening and closing the curtain and the window adopts the stepping motor 44 and the stepping motor 52, the rotating speed and the rotating step number of the stepping motor can be controlled by controlling the frequency of the pulse and the number of the pulse, and the stroke can be controlled by the pulse number by matching with the lead screw with the fixed lead, so that an open-loop controller is made. Pulse signals of the stepping motor 44 and the stepping motor 52 are supplied from the micro control unit 43 and the micro control unit 51, respectively.
In addition, in the embodiment of the present invention, the display touch screen adopts a 2.8-inch TFT LCDC touch liquid crystal screen, and the working principle is according to the ILI9341 screen data manual; the wireless transmission module adopts a QZ01-1600L low-power wireless data transmission module;
the LED fluorescent lamp driving module adopts an 8050 triode, and the working principle is as follows: when no voltage is input to the b pole of the NPN triode, no current passes between the c pole and the e pole, the c pole and the e pole are closed, and the triode is in a cut-off state; when a positive voltage is input to the b electrode of the NPN triode, negative electrons in the N region of the e electrode are attracted by positive electrons in the P region of the b electrode to flow out (diffuse) to the base region under the action of an electric field, only a part of negative electrons collide (are compounded) with the positive electrons to generate base current because the base region is made to be very thin, the other part of negative electrons are gathered near a collector junction, and the negative electrons gathered on the collector junction under the action of the electric field penetrate (drift) the collector junction and collide with the positive electrons gathered on the c electrode (N-type semiconductor end) after reaching the collector region to generate collector current. The larger the base current is, the larger the collector current is, namely the collector inputs a small current, the collector can obtain a large current, and the triode is in an amplifying state at the moment; when the base current reaches a certain degree, the collector current does not rise any more, at this time, the triode loses the current amplification effect, the voltage between the collector and the emitter is very small, the conducting state between the collector and the emitter is equivalent to that of a switch, and the triode is in a saturated state at this moment;
the illumination sensor adopts BH1750FVI, and the working principle of the illumination sensor is according to a BH1750FVI data manual;
the LED fluorescent lamp is an LED hard strip lamp bar 5V2803 patch, the pyroelectric infrared sensor adopts HC-SR501, and the working principle is as follows: ordinary human body can emit infrared rays with specific wavelength of about 10um, the existence of the infrared rays can be detected in a targeted manner by using a specially designed sensor, when the infrared rays of the human body irradiate the sensor, charges are released outwards due to the pyroelectric effect, and a subsequent circuit can generate a control signal after detection processing. The specially designed probe is only sensitive to infrared radiation with the wavelength of about 10 mu m, so that other objects except the human body cannot cause the probe to act. The probe comprises two pyroelectric elements which are mutually connected in series or in parallel, the polarization directions of the two manufactured pyroelectric elements are just opposite, the environmental background radiation almost has the same effect on the two pyroelectric elements, the pyroelectric effects generated by the two pyroelectric elements are mutually counteracted, and then the detector has no signal output. Once a person invades into the detection area, infrared radiation of the human body is focused through a part of mirror surface and is received by the pyroelectric elements, but the heat received by the two pyroelectric elements is different, the pyroelectric elements are also different and cannot be counteracted, and then a detection signal is output;
the first stepping motor and the second stepping motor adopt 28BYJ48 four-phase five-wire stepping motors, the supplier is Shenzhen Shenyuanfeng technology Limited, the contact address is A2872 of Shenzhen Shentian district Shenhua Luo Kokkendo electronic market in Guangdong Shenzhen district, and the contact telephone is 0755-;
the first motor driving module and the second motor driving module adopt ULN2803, the ULN2803 is a high-voltage-withstanding and large-current composite transistor array and consists of eight silicon NPN composite transistors, each pair of Darlington is connected with a 2.7K base resistor in series, the Darlington can be directly connected with TTL and CMOS circuits under the working voltage of 5V, and the current can reach 500 mA;
the sound sensor adopts an analog quantity output sound sensor, a capacitance electret microphone sensitive to sound is arranged in the sound sensor, sound waves enable an electret film in the microphone to vibrate to cause the change of capacitance, and tiny voltage which changes correspondingly is generated and is output after passing through an amplifying circuit; the sound sensor is connected with the singlechip and converts the sound into a voltage signal and transmits the voltage signal to the singlechip;
the raindrop sensor adopts a leaf sensor, and the detection principle is that the resistance value between two detected points changes due to the change of rainfall, so that the rainfall can be indirectly obtained; some conductive lines are etched on the PCB, and when no raindrop exists, the resistance between the conductive lines is large; in the presence of raindrops, the mutually insulated conductive wires are connected by water to significantly reduce the resistance. Therefore, the rainfall can be indirectly detected by detecting the size of the resistor, and the resistance value is converted into an electric signal to be transmitted to the single chip microcomputer.
Wherein, LED fluorescent lamp drive module, pyroelectric infrared sensor, first step motor, second step motor, sound sensor, raindrop sensor provide by Chongqing's loose electron management portion, its contact address is: yalan electronic city No. B1035 bay No. 220 of Xinhualu in Chongqing City, and the connection telephone: 86-023-66802863; electronic mailbox: juxinic @126. com.
The above is the preferred embodiment of the present invention, it should be noted that the above selected embodiment is not a limitation of the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all embodiments are protected by patent laws within the scope of the present invention.
Claims (4)
1. An intelligent classroom system, characterized by: comprises a main controller, a man-machine interaction end, an illumination control device, a window control device, a curtain control device and a person number detection device;
the man-machine interaction end comprises a mobile phone terminal and a display touch screen arranged outside a classroom door, the display touch screen is connected with the main controller, and the main controller is in communication connection with the mobile phone terminal in a radio frequency mode through a wireless transmission module;
the lighting control device comprises an LED fluorescent lamp driving module, a illuminance sensor, a plurality of LED fluorescent lamps uniformly arranged on a ceiling of a classroom and pyroelectric infrared sensors which are arranged on the ceiling and correspond to the LED fluorescent lamps one by one, wherein the output end of the illuminance sensor and the output end of the pyroelectric infrared sensor are both connected with the input end of the main controller, the input end of the LED fluorescent lamp driving module is connected with the output end of the main controller, and the output end of the LED fluorescent lamp driving module is connected with the LED fluorescent lamps;
the window control device comprises a first stepping motor for controlling the opening and closing of a window, a first motor driving module, a first micro-control unit for providing a time sequence pulse signal for the first stepping motor, a sound sensor arranged on the outer wall of a classroom or one meter outside the window and a raindrop sensor arranged on the outer wall of the classroom, wherein the output end of the sound sensor and the output end of the raindrop sensor are respectively connected with the input end of a main controller, the output end of the main controller is connected with the input end of the first micro-control unit, the output end of the first micro-control unit is connected with the input end of the first motor driving module, and the output end of the first motor driving module is connected with the input end of the first stepping motor;
the curtain control device comprises a second stepping motor for controlling the opening and closing of the curtain, a second motor driving module and a second micro-control unit for providing a time sequence pulse signal for the second stepping motor, wherein the input end of the second micro-control unit is connected with the output end of the main controller, the output end of the second micro-control unit is connected with the input end of the second motor driving module, and the output end of the second motor driving module is connected with the input end of the second stepping motor;
the number detection device comprises two groups of photoelectric switches which are respectively arranged on a front door and a rear door of a classroom, wherein each group comprises two pairs, two pairs of photoelectric switches of each group are arranged at equal height positions on a door, one pair of photoelectric switches are arranged outside the door and the other pair of photoelectric switches are arranged in the door, the transmitting end and the receiving end of each pair of photoelectric switches are respectively arranged on two sides of the door, the transmitting ends of the two pairs of photoelectric switches are arranged on different sides, and the output ends of the photoelectric switches are connected with the input end of a main controller.
2. A smart classroom system as defined in claim 1, wherein: the main controller adopts STM32F103ZET6 singlechip.
3. A smart classroom system as defined in claim 1, wherein: the micro-control unit adopts an AT89C2051 singlechip.
4. A smart classroom system as defined in claim 1, wherein: the display touch screen is a liquid crystal screen and is used for man-machine interaction and displaying time, a class schedule, the number of corresponding people and the number of absent people in real time.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116661329A (en) * | 2023-07-25 | 2023-08-29 | 北京万讯博通科技发展有限公司 | Cooperative regulation and control method for intelligent classroom acousto-optic system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116661329A (en) * | 2023-07-25 | 2023-08-29 | 北京万讯博通科技发展有限公司 | Cooperative regulation and control method for intelligent classroom acousto-optic system |
| CN116661329B (en) * | 2023-07-25 | 2023-11-14 | 北京万讯博通科技发展有限公司 | Cooperative regulation and control method for intelligent classroom acousto-optic system |
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