Sensor and smart interactive tablet

Abstract

This application provides a sensor and a smart interactive flat panel. The sensor includes: a sensing signal output unit, a modulation unit, an amplification unit, a first sensing unit, and an electromagnetic unit for attaching the sensor to the frame of the smart interactive flat panel. The modulation unit modulates the sensing signal from the sensing signal output unit and transmits the modulated signal to the amplification unit. The amplification unit amplifies the modulated signal and transmits the amplified signal to the first sensing unit. The first sensing unit transmits the amplified signal to a second sensing unit to transmit the amplified signal to a controller. The second sensing unit and the controller are disposed in the smart interactive flat panel, and the first sensing unit and the second sensing unit are inductively connected. This application enables more convenient connection of the sensor to different locations on the smart interactive flat panel for real-time communication.

Description

Technical Field

[0001] This application relates to the field of smart interactive flat panel technology, and more particularly to a sensor and a smart interactive flat panel. Background Technology

[0002] With the development of human-computer interaction technology, more and more electronic devices that facilitate people's lives and / or work have emerged, such as smart interactive whiteboards. A smart interactive whiteboard is an integrated device that uses touch technology to control content displayed on a flat screen and achieve human-computer interaction.

[0003] In practical applications, smart interactive whiteboards can acquire real-time data from connected sensors, which can then be applied to different business scenarios. Currently, sensors typically connect to the smart interactive whiteboard via fixed physical interfaces, such as a Universal Serial Bus (USB) interface, for real-time communication. For example, by connecting a temperature and humidity sensor to the top of the smart interactive whiteboard via a USB interface, the whiteboard can obtain the current ambient temperature and humidity in real time. However, the method of connecting sensors to the smart interactive whiteboard is limited by the location of the physical interface. Summary of the Invention

[0004] This application provides a sensor and a smart interactive flat panel to solve the problem that the way the sensor is connected to the smart interactive flat panel is limited by the location of the physical interface.

[0005] In a first aspect, this application provides a sensor for use in a smart interactive flat panel. The sensor includes: a sensing signal output unit, a modulation unit, an amplification unit, a first sensing unit, and an electromagnetic unit for attaching the sensor to the edge of the smart interactive flat panel.

[0006] The input terminal of the modulation unit is connected to the sensing signal output unit, the output terminal of the modulation unit is connected to the input terminal of the amplification unit, the first output terminal of the amplification unit is connected to the first terminal of the first sensing unit, the second output terminal of the amplification unit is grounded through the electromagnetic unit, and the second terminal of the first sensing unit is connected to the power supply voltage.

[0007] The modulation unit is used to modulate the sensing signal from the sensing signal output unit and transmit the modulated signal to the amplification unit.

[0008] An amplification unit is used to amplify the modulated signal and transmit the amplified signal to the first sensing unit.

[0009] The first sensing unit is used to transmit the amplified signal to the second sensing unit so that the amplified signal can be transmitted to the controller. The second sensing unit and the controller are set in the smart interactive flat panel, and the first sensing unit and the second sensing unit are connected inductively.

[0010] Optionally, the modulation unit includes a control switch, wherein: a first input terminal of the control switch serves as the input terminal of the modulation unit and is used to connect to the sensing signal output unit; a second input terminal of the control switch is used to receive a carrier signal that modulates the sensing signal; and the output terminal of the control switch serves as the output terminal of the modulation unit.

[0011] Optionally, the control switch determines whether to input the carrier signal to the amplification unit under the action of the sensing signal; if the sensing signal is high, the control switch inputs the carrier signal to the amplification unit; if the sensing signal is low, the control switch disconnects from the signal generator that generates the carrier signal.

[0012] Optionally, the amplification unit is a common-emitter amplifier circuit, with the base of the common-emitter amplifier circuit serving as the input terminal of the amplification unit; the collector of the common-emitter amplifier circuit serving as the first output terminal of the amplification unit; and the emitter of the common-emitter amplifier circuit serving as the second output terminal of the amplification unit.

[0013] Secondly, this application provides an intelligent interactive flat panel, including: a display screen, a controller, a sensor, a back panel, and a frame; wherein the display screen is located between the frame and the back panel, and the frame abuts against the display screen;

[0014] The sensor includes: a sensing signal output unit, a modulation unit, an amplification unit, a first sensing unit, and an electromagnetic unit; wherein, the input terminal of the modulation unit is connected to the sensing signal output unit, the output terminal of the modulation unit is connected to the input terminal of the amplification unit, the first output terminal of the amplification unit is connected to the first terminal of the first sensing unit, the second output terminal of the amplification unit is grounded through the electromagnetic unit, and the second terminal of the first sensing unit is connected to a power supply voltage; the electromagnetic unit is used to magnetically attach the sensor to a frame; the modulation unit is used to modulate the sensing signal from the sensing signal output unit and transmit the modulated signal to the amplification unit; the amplification unit is used to amplify the modulated signal and transmit the amplified signal to the first sensing unit; the first sensing unit is used to transmit the amplified signal to the second sensing unit, and the first sensing unit and the second sensing unit are inductively connected;

[0015] A second sensing unit and a resistor are provided on the inner side of the frame. The first end of the second sensing unit is connected to the first end of the controller via the resistor, and the second end of the second sensing unit is connected to the second end of the controller. The second sensing unit is used to receive the amplified signal and transmit the amplified signal to the controller.

[0016] Optionally, the second sensing unit is positioned around the frame.

[0017] Optionally, the modulation unit includes a control switch, wherein: a first input terminal of the control switch serves as the input terminal of the modulation unit and is used to connect to the sensing signal output unit; a second input terminal of the control switch is used to receive a carrier signal that modulates the sensing signal; and the output terminal of the control switch serves as the output terminal of the modulation unit.

[0018] Optionally, the control switch determines whether to input the carrier signal to the amplification unit under the action of the sensing signal; if the sensing signal is high, the control switch inputs the carrier signal to the amplification unit; if the sensing signal is low, the control switch disconnects from the signal generator that generates the carrier signal.

[0019] Optionally, the amplification unit is a common-emitter amplifier circuit, with the base of the common-emitter amplifier circuit serving as the input terminal of the amplification unit; the collector of the common-emitter amplifier circuit serving as the first output terminal of the amplification unit; and the emitter of the common-emitter amplifier circuit serving as the second output terminal of the amplification unit.

[0020] Optionally, the first sensing unit is the primary winding of the magnetic device, and the second sensing unit is the secondary winding of the magnetic device.

[0021] The sensor and smart interactive flat panel provided in this application include: a sensing signal output unit, a modulation unit, an amplification unit, a first sensing unit, and an electromagnetic unit for attaching the sensor to the frame of the smart interactive flat panel; wherein, the input terminal of the modulation unit is connected to the sensing signal output unit, the output terminal of the modulation unit is connected to the input terminal of the amplification unit, the first output terminal of the amplification unit is connected to the first terminal of the first sensing unit, the second output terminal of the amplification unit is grounded through the electromagnetic unit, and the second terminal of the first sensing unit is connected to the power supply voltage; the modulation unit modulates the sensing signal from the sensing signal output unit and transmits the modulated signal to the amplification unit; the amplification unit amplifies the modulated signal and transmits the amplified signal to the first sensing unit; the first sensing unit transmits the amplified signal to the second sensing unit to transmit the amplified signal to the controller, the second sensing unit and the controller are disposed in the smart interactive flat panel, and the first sensing unit and the second sensing unit are inductively connected. Because this application uses the electromagnetic unit contained in the sensor to attach the sensor to the edge of the smart interactive flat panel, and combines the modulation unit, amplification unit, first sensing unit and second sensing unit to realize the communication between the sensor and the smart interactive flat panel, instead of connecting the sensor to the smart interactive flat panel through a fixed physical interface, it is more convenient to connect the sensor to different positions of the smart interactive flat panel and communicate with the smart interactive flat panel in real time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram showing a temperature and humidity sensor provided in one embodiment of this application connected to a smart interactive flat panel via a physical interface;

[0024] Figure 2 A schematic diagram of the principle of a sensor provided in one embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the structure of a sensor provided in one embodiment of this application;

[0026] Figure 4 A schematic diagram illustrating the principle of an intelligent interactive flat panel provided in an embodiment of this application;

[0027] Figure 5 A schematic diagram illustrating the principle of a smart interactive flat panel provided in another embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the structure of a smart interactive flat panel provided in an embodiment of this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] First, the technical terms used in this application will be explained:

[0031] An electromagnet is a device that generates electromagnetic fields by passing an electric current through it. It works by winding a conductive wire around an iron core, then passing an electric current through the wire, creating a magnetic field similar to that of a magnet. The iron core enhances the magnetic force of the field. The magnetic force of a magnet can be calculated using the following formula:

[0032]

[0033] Where F represents the generated magnetic force, in N; φ is the magnetic flux through the iron core, in Wb; and S is the area of ​​the polarization surface of the iron core, in m².2 δ is the air gap distance in cm; α is the correction factor, which is generally a number between 3 and 5.

[0034] A transformer is a device that uses the principle of electromagnetic induction to change alternating current (AC) voltage. Its main components are a primary coil, a secondary coil, and an iron core (or magnetic core). The coil has two or more windings; the winding connected to the power source is the primary coil, and the remaining windings are the secondary coils. The structure of a transformer is similar to that of an electromagnet. It can be used to transform AC voltage, current, and impedance. When an alternating current flows through the primary coil, an alternating magnetic flux is generated in the iron core (or magnetic core), inducing a voltage (or current) in the secondary coil.

[0035] Amplitude Shift Keying (ASK): also known as digital amplitude modulation, is a modulation method that uses baseband digital signals to control the amplitude of a carrier wave. ASK represents digital signals "1" and "0" by changing the amplitude of the carrier signal. For example, when the carrier signal amplitude is full, it represents digital signal "1", and when the carrier signal amplitude is 0, it represents digital signal "0".

[0036] Currently, sensors typically connect to smart interactive whiteboards via fixed physical interfaces, such as USB interfaces, to enable real-time communication with the whiteboard. For example, Figure 1 A schematic diagram illustrating a temperature and humidity sensor connected to a smart interactive flat panel via a physical interface, as provided in one embodiment of this application. Figure 1 As shown, a temperature and humidity sensor is connected to the top of the smart interactive whiteboard in the conference room via a USB interface. The smart interactive whiteboard can then obtain the real-time temperature and humidity of the conference room through this sensor. Due to aesthetic and space constraints, the temperature and humidity sensor may have to be installed in a fixed location on the smart interactive whiteboard, such as the top or bottom. The above installation method has the following problems:

[0037] (1) Additional interfaces are required when designing the sensor installation;

[0038] (2) An assembly process has been added;

[0039] (3) The connection position between the sensor and the smart interactive panel is fixed. When the sensor is installed on the top of the smart interactive panel, the heat of the smart interactive panel will affect the accuracy of the data obtained by the sensor.

[0040] To address the aforementioned issues, this application provides a sensor and an intelligent interactive flat panel, which achieves communication between the sensor and the intelligent interactive flat panel based on the principle of combining an electromagnet and a transformer into the same circuit.

[0041] Figure 2This is a schematic diagram of a sensor provided in one embodiment of this application. The sensor is applied to a smart interactive flat panel. Figure 2 As shown, the sensor 200 in this embodiment includes: a sensing signal output unit 210, a modulation unit 201, an amplification unit 202, a first sensing unit 203, and an electromagnetic unit 204 for attaching the sensor to the frame of the smart interactive flat panel. Wherein:

[0042] The input terminal of the modulation unit 201 is connected to the sensing signal output unit 210. The output terminal of the modulation unit 201 is connected to the input terminal of the amplification unit 202. The first output terminal of the amplification unit 202 is connected to the first terminal of the first sensing unit 203. The second output terminal of the amplification unit 202 is grounded through the electromagnetic unit 204. The second terminal of the first sensing unit 203 is connected to the power supply voltage.

[0043] The modulation unit 201 is used to modulate the sensing signal from the sensing signal output unit 210 and transmit the modulated signal to the amplification unit 202.

[0044] The amplification unit 202 is used to amplify the modulated signal and transmit the amplified signal to the first sensing unit 203.

[0045] The first sensing unit 203 is used to transmit the amplified signal to the second sensing unit 205 so that the amplified signal can be transmitted to the controller 206. The second sensing unit 205 and the controller 206 are set in the smart interactive flat panel, and the first sensing unit 203 and the second sensing unit 205 are connected inductively.

[0046] In this embodiment, the sensing signal output unit 210 is used, for example, to measure temperature and humidity to obtain corresponding sensing signals, such as voltage signals. The modulation unit 201 modulates the sensing signal from the sensing signal output unit 210 in a manner such as amplitude shift keying (APS) based on the principle of APS (refer to the above explanation of technical terms), but this application is not limited to this. The electromagnetic unit 204 is, for example, an electromagnet. An electromagnet generates magnetic force when energized. Even without external signal input, the amplification unit 202 connected to the electromagnet itself has a static current, ensuring that the electromagnet always generates magnetic force. The controller 206 is, for example, a microcontroller unit (MCU), which processes the received amplified signal accordingly.

[0047] For example, the modulation unit 201 receives a voltage signal from the sensor signal output unit 210. Based on the principle of amplitude shift keying (APS), it performs APS modulation on the voltage signal, that is, it controls the amplitude of the carrier signal according to the change in the voltage signal to obtain a modulated signal. How the modulation unit 201 performs APS modulation on the voltage signal from the sensor to obtain the modulated signal can be found in related technologies or subsequent embodiments, and will not be repeated here. After obtaining the modulated signal, the modulation unit 201 transmits the modulated signal to the amplification unit 202. The amplification unit 202 is an amplification circuit that amplifies the modulated signal to obtain an amplified signal, and then transmits the amplified signal to the first sensing unit 203. After obtaining the amplified signal, the first sensing unit 203 transmits the amplified signal to the inductively connected second sensing unit 205 to transmit the amplified signal to the controller 206.

[0048] The sensor provided in this application includes a sensing signal output unit, a modulation unit, an amplification unit, a first sensing unit, and an electromagnetic unit for attaching the sensor to the frame of a smart interactive flat panel. The input terminal of the modulation unit is connected to the sensing signal output unit, the output terminal of the modulation unit is connected to the input terminal of the amplification unit, the first output terminal of the amplification unit is connected to the first terminal of the first sensing unit, the second output terminal of the amplification unit is grounded through the electromagnetic unit, and the second terminal of the first sensing unit is connected to a power supply voltage. The modulation unit modulates the sensing signal from the sensing signal output unit and transmits the modulated signal to the amplification unit. The amplification unit amplifies the modulated signal and transmits the amplified signal to the first sensing unit. The first sensing unit transmits the amplified signal to the second sensing unit to transmit the amplified signal to a controller. The second sensing unit and the controller are disposed in the smart interactive flat panel, and the first sensing unit and the second sensing unit are inductively connected. Because this application uses the electromagnetic unit contained in the sensor to attach the sensor to the edge of the smart interactive flat panel, and combines the modulation unit, amplification unit, first sensing unit and second sensing unit to realize the communication between the sensor and the smart interactive flat panel, instead of connecting the sensor to the smart interactive flat panel through a fixed physical interface, it is more convenient to connect the sensor to different positions of the smart interactive flat panel and communicate with the smart interactive flat panel in real time.

[0049] Figure 3 This is a schematic diagram of the structure of a sensor provided in one embodiment of this application. Based on the above embodiment, this application further describes the sensor 200. For example... Figure 3As shown, the sensor 200 includes: a sensing signal output unit 210, a modulation unit 201, an amplification unit 202, a first sensing unit 203, and an electromagnetic unit 204 for attaching the sensor to the frame of the smart interactive flat panel. The modulation unit 201 includes a control switch 2011, wherein the first input terminal 301 of the control switch 2011 serves as the input terminal of the modulation unit 201 and is connected to the sensing signal output unit 210; the second input terminal 302 of the control switch 2011 is used to receive a carrier signal that modulates the sensing signal; and the output terminal 303 of the control switch 2011 serves as the output terminal of the modulation unit 201.

[0050] In this embodiment of the application, reference is made to Figure 3 If the control switch 2011 is, for example, a relay switch (this application is not limited to this), then the first input terminal 301 of the relay switch is the coil pin of the relay switch, which is the input terminal of the modulation unit 201, connected to the sensing signal output unit 210, and receives the sensing signal from the sensing signal output unit 210. The sensing signal is, for example, represented by U(t). Specifically, the sensing signal is, for example, a voltage signal from the sensing signal output unit 210. The second input terminal 302 of the relay switch is the normally open pin of the relay switch, connected to a carrier signal that modulates the sensing signal. For example, the carrier signal is generated by a signal generator in the sensor. Figure 3 The carrier signal is represented by U1. For example, the magnitude of the carrier signal U1 is Acos(ωt), where A represents the carrier amplitude in volts (V), ω represents the carrier frequency in rad / s, and t represents time in seconds. The output terminal 303 of the relay switch is the output terminal of the modulation unit 201, which outputs the signal modulated by the modulation unit 201 to the amplification unit 202.

[0051] Based on the above embodiments, optionally, the control switch 2011 determines whether to input the carrier signal to the amplification unit 202 under the action of the sensing signal; if the sensing signal is high level, the control switch 2011 inputs the carrier signal to the amplification unit 202; if the sensing signal is low level, the control switch 2011 disconnects from the signal generator that generates the carrier signal.

[0052] For example, refer to Figure 3The control switch 2011, for example, is a relay switch. When the relay switch is turned on by the sensor signal, the carrier signal is input to the amplifier unit 202. Alternatively, when the relay switch is turned off by the sensor signal, the carrier signal is not input to the amplifier unit 202. The sensor signal U(t), for example, is a voltage signal. The sensor signal U(t) is a digital signal, including two states: 0 and 1. When U(t) is 0, it represents a low level; when U(t) is 1, it represents a high level. Assuming that when U(t) is 1, the voltage signal has the same amplitude as the carrier signal, and when U(t) is 0, the voltage signal is 0, the U(t) signal is used to control the relay switch. When the U(t) signal is 1 (i.e., high level), the relay switch is closed (corresponding to...). Figure 3 At the second input terminal 302, the relay switch inputs the carrier signal U1 (the magnitude of U1 is Acos(ωt)) to the amplifier unit 202; when the U(t) signal is 0 (i.e., low level), the relay switch disconnects from the signal generator that generates the carrier signal U1 (corresponding to...). Figure 3 At the second input terminal 302, the relay switch will not input the carrier signal U1 to the amplifier unit 202. Therefore, the input signal received by the amplifier unit 202 is Acos(ωt) or 0.

[0053] Based on the above embodiments, refer to Figure 3 Amplification unit 202 is a common-emitter amplifier circuit 2021. The base of the common-emitter amplifier circuit 2021 serves as the input terminal of the amplification unit 202; the collector of the common-emitter amplifier circuit 2021 serves as the first output terminal of the amplification unit 202; and the emitter of the common-emitter amplifier circuit 2021 serves as the second output terminal of the amplification unit 202.

[0054] For example, refer to Figure 3 The common-emitter amplifier circuit 2021 is, for example, a transistor. The base of the transistor serves as the input terminal of the amplifier unit 202, receiving the modulated signal input from the modulation unit 201. The collector of the transistor serves as the first output terminal of the amplifier unit 202, connected to the input terminal of the first sensing unit 203, outputting the amplified signal to the first sensing unit 203. The emitter of the transistor serves as the second output terminal of the amplifier unit 202, connected to one end of the electromagnetic unit 204, ensuring that the electromagnetic unit 204 always generates magnetic force. The transistor amplifies the modulated signal received from the modulation unit 201 to obtain the amplified signal. In practical applications, the amplifier unit 202 can also use an operational amplifier circuit, which is not a limitation of this application.

[0055] Figure 4 This is a schematic diagram illustrating the principle of a smart interactive flat panel provided in one embodiment of this application. Figure 4 As shown, the smart interactive flat panel 400 of this application embodiment includes: a display screen ( Figure 4(not shown in the image), controller 206, sensor 200, backplane ( Figure 4 (Not shown in the image) and border 401. Wherein:

[0056] The display screen is located between the bezel 401 and the back panel, with the bezel 401 abutting against the display screen.

[0057] The sensor 200 includes: a sensing signal output unit 210, a modulation unit 201, an amplification unit 202, a first sensing unit 203, and an electromagnetic unit 204. The input terminal of the modulation unit 201 is connected to the sensing signal output unit 210, the output terminal of the modulation unit 201 is connected to the input terminal of the amplification unit 202, the first output terminal of the amplification unit 202 is connected to the first terminal of the first sensing unit 203, the second output terminal of the amplification unit 202 is grounded through the electromagnetic unit 204, and the second terminal of the first sensing unit 203 is connected to a power supply voltage. The electromagnetic unit 204 is used to attach the sensor to the frame 401. The modulation unit 201 modulates the sensing signal from the sensing signal output unit 210 and transmits the modulated signal to the amplification unit 202. The amplification unit 202 amplifies the modulated signal and transmits the amplified signal to the first sensing unit 203. The first sensing unit 203 transmits the amplified signal to the second sensing unit 205, and the first sensing unit 203 and the second sensing unit 205 are inductively connected.

[0058] A second sensing unit 205 and a resistor 402 are provided on the inner side of the frame 401. The first end of the second sensing unit 205 is connected to the first end of the controller 206 via the resistor 402, and the second end of the second sensing unit 205 is connected to the second end of the controller 206. The second sensing unit 205 is used to receive the amplified signal and transmit the amplified signal to the controller 206.

[0059] In this embodiment of the application, by way of example, reference is made to Figure 3 The controller 206 is, for example, an MCU. The first terminal of the MCU is the Analog-to-Digital Converter General Purpose Input Output (ADC_GPIO) port, i.e. Figure 3The ADC_GPIO1 port receives the amplified signal transmitted from the second sensing unit 205. If the amplified signal is, for example, a voltage signal, it is converted into a digital signal by the ADC and then demodulated to obtain, for example, the corresponding temperature. For example, the MCU can detect whether there is a voltage signal input; if there is, it returns 1, and if there is no voltage signal input, it returns 0. By demodulating the signal in this way, it can convert the signal into the corresponding temperature according to a preset signal transmission protocol, such as a temperature represented in binary, where 0010 represents 2℃. The second terminal of the second sensing unit 205 and the second terminal of the MCU (i.e.,...) Figure 3 The ADC_GPIO2 connection is in the middle.

[0060] In some embodiments, the modulation unit 201 includes a control switch 2011, wherein the first input terminal 301 of the control switch 2011 serves as the input terminal of the modulation unit 201 and is used to connect to the sensing signal output unit 210; the second input terminal 302 of the control switch 2011 is used to receive a carrier signal that modulates the sensing signal; and the output terminal 303 of the control switch 2011 serves as the output terminal of the modulation unit 201.

[0061] Optionally, the control switch 2011 determines whether to input the carrier signal to the amplification unit 202 under the action of the sensing signal; if the sensing signal is high, the control switch 2011 inputs the carrier signal to the amplification unit 202; if the sensing signal is low, the control switch 2011 disconnects from the signal generator that generates the carrier signal.

[0062] In some embodiments, the amplification unit 202 is a common-emitter amplifier circuit 2021, with the base of the common-emitter amplifier circuit 2021 serving as the input terminal of the amplification unit 202; the collector of the common-emitter amplifier circuit 2021 serving as the first output terminal of the amplification unit 202; and the emitter of the common-emitter amplifier circuit 2021 serving as the second output terminal of the amplification unit 202.

[0063] For example, after receiving the amplified signal transmitted by the first sensing unit 203, the second sensing unit 205 transmits the amplified signal to the controller 206. The controller 206 processes the received amplified signal accordingly and displays the processing result on the screen of the display.

[0064] The intelligent interactive flat panel provided in this application includes a display screen, a controller, sensors, a back panel, and a frame. The display screen is located between the frame and the back panel, with the frame abutting against the display screen. The sensors include a sensing signal output unit, a modulation unit, an amplification unit, a first sensing unit, and an electromagnetic unit. The input terminal of the modulation unit is connected to the sensing signal output unit, and the output terminal of the modulation unit is connected to the input terminal of the amplification unit. The first output terminal of the amplification unit is connected to the first terminal of the first sensing unit, and the second output terminal of the amplification unit is grounded through the electromagnetic unit. The second terminal of the first sensing unit is connected to a power supply voltage. The electromagnetic unit attracts the sensors to the frame. The modulation unit modulates the sensing signal from the sensing signal output unit and transmits the modulated signal to the amplification unit. The amplification unit amplifies the modulated signal and transmits the amplified signal to the first sensing unit. The first sensing unit transmits the amplified signal to the second sensing unit, and the first and second sensing units are inductively connected. A second sensing unit and a resistor are disposed inside the frame. The first terminal of the second sensing unit is connected to the first terminal of the controller through the resistor, and the second terminal of the second sensing unit is connected to the second terminal of the controller. The second sensing unit receives the amplified signal and transmits the amplified signal to the controller. Because this application uses the electromagnetic unit included in the sensor to attach the sensor to the edge of the smart interactive flat panel, and combines the modulation unit, amplification unit, first sensing unit included in the sensor and the second sensing unit included in the display screen to realize communication between the sensor and the smart interactive flat panel, it is possible to more conveniently connect the sensor to different positions of the smart interactive flat panel and communicate with the smart interactive flat panel in real time.

[0065] Based on the above embodiments, the second sensing unit 205 is further disposed around the frame 401.

[0066] For example, the second sensing unit 205 can be arranged around the frame 401, that is, the second sensing unit 205 is arranged around the frame 401 with a sufficiently high density, so that the sensor can be attached to the smart interactive flat panel 400 anywhere to realize communication between the sensor and the smart interactive flat panel 400.

[0067] Based on the above embodiments, optionally, the first sensing unit 203 is the primary winding of the magnetic device, and the second sensing unit 205 is the secondary winding of the magnetic device.

[0068] For example, refer to Figure 3 The magnetic device is, for example, a transformer. The primary winding of the transformer is the first induction unit 203, and the secondary winding is the second induction unit 205. The ratio of the primary to secondary windings of the transformer is, for example, 1:1. One end of the primary winding of the transformer is connected to the amplification unit 202, and the other end of the primary winding is connected to the power supply voltage. Figure 3 The circuit's supply voltage (Volt Current Condenser, VCC). The first terminal of the transformer's secondary winding is connected to the first terminal of the controller 206 via resistor 402, and the second terminal of the transformer's secondary winding is connected to the second terminal of the controller 206. The transformer's secondary winding is used to receive the amplified signal and transmit the amplified signal to the controller 206.

[0069] Figure 5 This is a schematic diagram illustrating the principle of a smart interactive flat panel provided in another embodiment of this application. For example... Figure 5 As shown, the intelligent interactive flat panel 500 includes a sensor 501, a frame 502, and a microcontroller unit 505. The sensor 501 is attached to the frame 502 via an included electromagnetic unit. The sensor 501 generates electromagnetic induction between the primary winding 503 of the magnetic device and the secondary winding 504 of the magnetic device disposed within the frame 502, transmitting the sensing signal of the sensor 501 to the microcontroller unit 505, thereby realizing communication between the sensor 501 and the intelligent interactive flat panel 500.

[0070] Figure 6 This is a schematic diagram of the structure of a smart interactive flat panel provided in one embodiment of this application. Figure 6 As shown, the intelligent interactive flat panel 600 may include: at least one controller 601, at least one network interface 604, user interface 603, memory 605, and at least one communication bus 602.

[0071] The communication bus 602 is used to enable communication between these components.

[0072] The user interface 603 may include a display screen and a camera. Optionally, the user interface 603 may also include a standard wired interface and a wireless interface.

[0073] The network interface 604 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface).

[0074] The controller 601 may include one or more processing cores. The controller 601 connects to various parts within the intelligent interactive flat panel 600 using various interfaces and lines. It executes various functions and processes data of the intelligent interactive flat panel 600 by running or executing instructions, programs, code sets, or instruction sets stored in the memory 605, and by calling data stored in the memory 605. Optionally, the controller 601 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The controller 601 may integrate one or more of the following: a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), and a modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content to be displayed on the screen; and the modem handles wireless communication. It is understood that the modem may also be implemented as a separate chip without being integrated into the controller 601.

[0075] The memory 605 may include random access memory (RAM) or read-only memory. Optionally, the memory 605 may include a non-transitory computer-readable storage medium. The memory 605 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 605 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the above-described method embodiments, etc.; the data storage area may store data involved in the above-described method embodiments, etc. Optionally, the memory 605 may also be at least one storage device located remotely from the aforementioned controller 601. Figure 6 As shown, the memory 605, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and operating applications for the smart interactive flat panel.

[0076] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. In the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A sensor, characterized in that, The sensor, which is used in smart interactive flat panels, includes: a sensing signal output unit, a modulation unit, an amplification unit, a first sensing unit, and an electromagnetic unit for attaching the sensor to the frame of the smart interactive flat panel. The modulation unit's input terminal is connected to the sensing signal output unit, the modulation unit's output terminal is connected to the amplification unit's input terminal, the amplification unit's first output terminal is connected to the first terminal of the first sensing unit, the amplification unit's second output terminal is grounded through the electromagnetic unit, and the first sensing unit's second terminal is connected to the power supply voltage. The modulation unit is used to modulate the sensing signal from the sensing signal output unit and transmit the modulated signal to the amplification unit. The amplification unit is used to amplify the modulated signal and transmit the amplified signal to the first sensing unit. The first sensing unit is used to transmit the amplified signal to the second sensing unit so as to transmit the amplified signal to the controller. The second sensing unit and the controller are disposed in the smart interactive flat panel, and the first sensing unit and the second sensing unit are connected inductively.

2. The sensor according to claim 1, characterized in that, The modulation unit includes a control switch, wherein: The first input terminal of the control switch serves as the input terminal of the modulation unit and is used to connect to the sensing signal output unit. The second input terminal of the control switch is used to receive a carrier signal that modulates the sensing signal; The output terminal of the control switch serves as the output terminal of the modulation unit.

3. The sensor according to claim 2, characterized in that, The control switch determines whether to input the carrier signal to the amplification unit under the action of the sensing signal; If the sensing signal is high, the control switch inputs the carrier signal to the amplification unit; if the sensing signal is low, the control switch disconnects from the signal generator that generates the carrier signal.

4. The sensor according to claim 1, characterized in that, The amplification unit is a common-emitter amplifier circuit, with the base of the common-emitter amplifier circuit serving as the input terminal of the amplification unit; the collector of the common-emitter amplifier circuit serving as the first output terminal of the amplification unit; and the emitter of the common-emitter amplifier circuit serving as the second output terminal of the amplification unit.

5. A smart interactive flat panel, characterized in that, include: The device includes a display screen, a controller, a sensor, a back panel, and a frame; wherein the display screen is located between the frame and the back panel, and the frame abuts against the display screen. The sensor includes: a sensing signal output unit, a modulation unit, an amplification unit, a first sensing unit, and an electromagnetic unit; wherein, the input terminal of the modulation unit is connected to the sensing signal output unit, the output terminal of the modulation unit is connected to the input terminal of the amplification unit, the first output terminal of the amplification unit is connected to the first terminal of the first sensing unit, the second output terminal of the amplification unit is grounded through the electromagnetic unit, and the second terminal of the first sensing unit is connected to a power supply voltage; the electromagnetic unit is used to magnetically attach the sensor to the frame; the modulation unit is used to modulate the sensing signal from the sensing signal output unit and transmit the modulated signal to the amplification unit; the amplification unit is used to amplify the modulated signal and transmit the amplified signal to the first sensing unit; the first sensing unit is used to transmit the amplified signal to the second sensing unit, and the first sensing unit and the second sensing unit are inductively connected; The second sensing unit and a resistor are disposed on the inner side of the frame. The first end of the second sensing unit is connected to the first end of the controller via the resistor, and the second end of the second sensing unit is connected to the second end of the controller. The second sensing unit is used to receive the amplified signal and transmit the amplified signal to the controller.

6. The intelligent interactive flat panel according to claim 5, characterized in that, The second sensing unit is arranged around the frame.

7. The intelligent interactive flat panel according to claim 5 or 6, characterized in that, The modulation unit includes a control switch, wherein: The first input terminal of the control switch serves as the input terminal of the modulation unit and is used to connect to the sensing signal output unit. The second input terminal of the control switch is used to receive a carrier signal that modulates the sensing signal; The output terminal of the control switch serves as the output terminal of the modulation unit.

8. The intelligent interactive flat panel according to claim 7, characterized in that, The control switch determines whether to input the carrier signal to the amplification unit under the action of the sensing signal; If the sensing signal is high, the control switch inputs the carrier signal to the amplification unit; if the sensing signal is low, the control switch disconnects from the signal generator that generates the carrier signal.

9. The intelligent interactive flat panel according to claim 5 or 6, characterized in that, The amplification unit is a common-emitter amplifier circuit, with the base of the common-emitter amplifier circuit serving as the input terminal of the amplification unit; the collector of the common-emitter amplifier circuit serving as the first output terminal of the amplification unit; and the emitter of the common-emitter amplifier circuit serving as the second output terminal of the amplification unit.

10. The intelligent interactive flat panel according to claim 5 or 6, characterized in that, The first sensing unit is the primary winding of the magnetic device, and the second sensing unit is the secondary winding of the magnetic device.

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