Magnetic type multifunctional intelligent detector

Abstract

The invention relates to the technical field of detectors, in particular to a magnetic type multifunctional intelligent detector which comprises a sensor module used for collecting environmental data such as temperature and humidity and outputting analog signals; the signal processing module outputs digital signals through filtering and digital interface conversion; the microprocessor is used for analyzing and storing the data and judging an abnormal threshold value; and the wireless communication module is used for transmitting signals and receiving instructions to realize user side interaction. The mobile phone wireless reverse power supply technology is adopted to provide energy for the magnetic type multifunctional intelligent detector, and meanwhile, the magnetic type multifunctional intelligent detector can be connected to a power adapter or a USB port of a computer or a mobile phone through a USB line to carry out multi-channel power supply. The device can be magnetically adsorbed on the surface of a mobile phone and is suitable for various indoor and outdoor use environments. According to the invention, an electric power guarantee mechanism of instant power supply and instant use is realized, rapid deployment and continuous use under multiple scenes are supported, the risk of electric power interruption is effectively avoided, and the continuity of safety monitoring is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of detectors, and particularly to a magnetic adsorption type multi-functional intelligent detector. Background Art

[0002] With the wide popularity of smart devices and the rapid development of wireless charging technology, we are facing a brand-new era. Against this background, traditional detection instruments often encounter power shortage problems due to relying on battery power supply, which greatly affects their usage efficiency. Especially in outdoor use or emergency detection scenarios, the inconvenience of power supply replenishment has become a difficult problem to be solved urgently.

[0003] Therefore, the market urgently needs an innovative solution, that is, a wireless charging multi-functional detector that can be powered by a mobile phone. This detector will be able to achieve flexible power supply guarantee of charging at any time and being ready to use immediately, thus greatly improving the convenience and efficiency of detection work and ensuring the best performance in various environments. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention discloses a magnetic adsorption type multi-functional intelligent detector, which is used to supply power to the magnetic adsorption type multi-functional detector through the mobile phone wireless reverse power supply technology or to supply power by connecting a power adapter or a computer USB port or a mobile phone USB port using a USB cable, supports multi-scene rapid deployment and uninterrupted use, eliminates the hidden danger of power failure, and keeps the safety monitoring always online.

[0005] The present invention is realized through the following technical solutions: The present invention provides a magnetic adsorption type multi-functional intelligent detector, including a housing, a bracket, a touch screen and a circuit part. The circuit part includes a sensor module, which is used to collect temperature and humidity, carbon dioxide, formaldehyde, carbon monoxide and ultraviolet information, and generate an analog signal for output; a signal processing and conversion module, which receives the analog signal output by the sensor module, filters out interference through an RC network, and converts it into a digital signal for output through a digital signal interface; a microprocessor, which receives and analyzes the digital signal output by the signal processing and conversion module, realizes data classification storage and abnormal threshold judgment; a wireless communication module, which is used to transmit the signal sent by the microprocessor and receive the control instruction sent by the user terminal to realize interaction with the user terminal.

[0006] Furthermore, the circuit part is arranged in the housing, the housing is arranged on the bracket, and the touch screen is arranged on the housing.

[0007] Furthermore, the multifunctional intelligent detector further includes a power supply module, and the power supply module includes a USB charging interface for inputting DC voltage and entering the circuit through the VBUS pin; a wireless charging coil for wireless energy reception, coupling electromagnetic energy through the coil, and generating a VRECT voltage after rectification; a system power supply path that receives the VRECT, directly powers some sensor modules after capacitor filtering; or powers the MCU and sensors after stepping down through a voltage conversion circuit and capacitor filtering.

[0008] Furthermore, the sensor module includes a temperature and humidity sensor, a carbon dioxide sensor, a formaldehyde sensor, a carbon monoxide sensor, and an ultraviolet sensor.

[0009] Furthermore, the signal processing and conversion module includes analog signal processing, filtering through an RC network to eliminate interference, providing gain through an operational amplifier to ensure that the signal amplitude adapts to the ADC input range of the MCU; a digital signal interface, including an I²C bus connecting all digital sensors, pull-up resistors R15 / R16 to ensure signal integrity, and an SPI interface for driving the display screen.

[0010] Furthermore, the microprocessor includes I / O allocation, a clock system, and a wireless radio frequency part, and the clock system sets an external crystal oscillator to provide the main clock.

[0011] Furthermore, the I / O allocation includes GPIO control, which has management buttons, an LED, and an LCD reset button; ADC acquisition, where ADC_CO, ADC_UV, and ADC_CH2O respectively receive analog signals of CO, ultraviolet rays, and formaldehyde; a communication interface, with I²C connecting the sensors, SPI controlling the display screen, and UART reserving a debugging interface.

[0012] Furthermore, the wireless communication module includes Bluetooth communication, with a built-in Bluetooth 5.0 module to achieve data transmission with a mobile phone / host computer; LCD display, setting an SPI interface to drive the display screen, the RS pin controlling the instruction / data mode, and the BK pin adjusting the backlight brightness through R41 - R43; user interaction, with the button pulled up through a resistor to trigger an MCU interrupt to achieve function switching; the LED is current-limited through a resistor to indicate the working state.

[0013] Furthermore, the multi-functional intelligent detector further includes a power protection circuit, which uses TVS1 / TVS2 to suppress surges and NTC1 to monitor temperature.

[0014] Furthermore, the multi-functional intelligent detector forms a power-on reset delay through resistor C28 and resistor R20 to ensure the stable startup of the MCU; and resonates through capacitors C23 and C18 with coil L1 to optimize the energy transfer efficiency.

[0015] The beneficial effects of the present invention are as follows: The present invention uses the mobile phone wireless reverse power supply technology to provide energy for the magnetic adsorption type multi-functional intelligent detector, and also supports multi-channel power supply by connecting to the power adapter or the USB ports of the computer and mobile phone through the USB cable. This device can be magnetically adsorbed on the surface of the mobile phone and is suitable for various indoor and outdoor use environments. It realizes an immediate power supply and immediate use power guarantee mechanism, supports rapid deployment and continuous use in multiple scenarios, effectively avoids the risk of power interruption, and ensures the continuity of safety monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is the circuit schematic diagram of the magnetic adsorption type multi-functional intelligent detector of the present invention; Figure 2 is the circuit schematic diagram of the power input and processing of the present invention; Figure 3 is the circuit schematic diagram of the wireless charging of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0019] In one embodiment, this embodiment provides a magnetic adsorption type multi-functional intelligent detector, which includes a housing, a bracket, a touch screen, and a circuit part. Refer to Figure 1As shown, the circuit part includes a sensor module for collecting temperature, humidity, carbon dioxide, formaldehyde, carbon monoxide and ultraviolet information and generating an analog signal output; A signal processing and conversion module that receives the analog signal output by the sensor module, filters out interference through an RC network, and converts it into a digital signal output through a digital signal interface; A microprocessor that receives and analyzes the digital signal output by the signal processing and conversion module, realizes data classification storage and abnormal threshold judgment; A wireless communication module for transmitting the signal sent by the microprocessor and receiving the control instruction sent by the user terminal to realize interaction with the user terminal.

[0020] As Figure 2 shown, the power input and its processing flow are as follows: The USB charging interface (usbc1) inputs a 5V DC voltage, and this voltage enters the circuit through the VBUS pin. The D+ / D- signal lines are impedance-matched through resistors R31 and R29 (33Ω), and at the same time, TVS1 / TVS2 (6.5V) provides overvoltage protection.

[0021] As Figure 3 shown, the wireless charging coil (L1) works in cooperation with the NU1680 wireless charging chip to be responsible for receiving wireless energy. Through the electromagnetic coupling of coil L1 (15.8μH), the wireless energy is rectified to generate the VRECT voltage. The wireless charging and USB charging are automatically switched through MOS transistors Q1 / Q2 (P-MOS), and the EN_B signal controls the power supply mode of the system.

[0022] The system power supply path includes a 5V path: VRECT is directly supplied to some sensor modules after being filtered by C7-C10 (10μF / 16V). 3.3V path: 5V is stepped down to 3.3V through U9 (CE1132-33M) and filtered by C45-C49 (10μF) to supply power to the MCU, sensors, etc.

[0023] In one embodiment, the acquisition and processing process of the sensor signal is as follows: A temperature and humidity sensor with the model U2:WHT20 is used. This sensor communicates with the microcontroller unit (MCU) through the I²C (SCL / SDA) interface. Resistors R11 and R12 are used to provide signal matching with the MCU.

[0024] A carbon dioxide sensor with the model U3: SY-CO2-28BMI also communicates with the MCU through the I²C (SCL / SDA) interface. Resistors R12 and R14 are used to provide signal matching, and CO2_SET is used to set the communication protocol of the module through resistors R17 / R18.

[0025] The analog signal output by the formaldehyde sensor (U6: MQ-E2-CH2O) is amplified by the amplifier of model U4 (TP5592 operational amplifier), and then input to the ADC_CH2O pin of the MCU through the resistor R38 for acquisition.

[0026] For the CO sensor of model U5: ME2-CO, the analog signal output by it is amplified by the amplifier of model U5 (SGM8091 operational amplifier), and the signal is input to the ADC_CO pin of the MCU through the resistor R21 for acquisition.

[0027] The ultraviolet sensor (LED1: GUVA-S12SD) receives the ultraviolet light signal and converts it into an electrical signal. After being amplified by the amplifier of model U4 (TP5592 operational amplifier), the electrical signal is input to the ADC_UV pin of the MCU through the resistor R24 for acquisition.

[0028] In one embodiment, the functions of the signal processing and conversion module are implemented as follows: 1. Analog signal conditioning module: The original signals output by each sensing unit are subjected to out-of-band noise suppression by the RC low-pass filter network (typical configuration parameters: R21 / C27, R24 / C28), and its -3dB cut-off frequency is determined by the formula f_c = 1 / (2πRC). The operational amplifier U5 constitutes an inverting amplifier circuit to adjust the signal gain, ensuring that the peak-to-peak value of the conditioned signal strictly meets the quantization range requirements (0 - 3.3 V) of the built-in ADC of the STM32F103 series MCU.

[0029] 2. Digital signal interface module: The system uses the I²C bus protocol to establish a digital sensor communication link (SCL / SDA), and realizes bus level matching through precision pull-up resistors R15 / R16 (resistance value 4.7kΩ ± 1%), and the resistance value selection meets the requirement of the rise time t_r ≤ 300ns in the I²C specification. The display unit is driven by a four-wire SPI interface (including signal lines such as LCD_SCK, LCD_MOSI, etc.), and the zero-waiting transmission of the video memory data is realized in cooperation with the DMA controller.

[0030] In one embodiment, the core processing architecture of the microcontroller of type TLSR8258F512ET48 (U7) includes the following technical features: 1. I / O resource configuration scheme: (1) General-purpose GPIO interface: Responsible for controlling the mechanical button (S1), the LED indicator (L2), and the LCD display reset signal (LCD_RESET) (2)Analog-to-Digital Conversion Channels: Configure three independent channels, namely ADC_CO, ADC_UV, and ADC_CH2O, to collect analog sensing signals of carbon monoxide, ultraviolet radiation, and formaldehyde concentration respectively. (3)Communication Bus Architecture: Construct an I²C bus (SCL / SDA) to achieve multi-sensor integration, use an SPI interface (LCD_CS / LCD_MOSI) to drive the display screen, reserve a UART (TXD / RXD) debugging interface, and integrate a USB physical layer communication module. 2. Clock System Design: Adopt a dual crystal oscillator architecture. The main clock source is a 24 MHz quartz crystal oscillator (Y1), supplemented by a 32.768 kHz low-frequency crystal oscillator (Y2) to provide a real-time clock reference for the low-power mode. 3. Wireless Communication Module: Integrate the Bluetooth 5.0 protocol stack, connect to an antenna matching network composed of a 3.3 nH matching inductor (L3) through the antenna port (ANT), and implement wireless radio frequency communication functions compliant with the IEEE 802.15.1 standard.

[0031] In one embodiment, the wireless communication and user interface system architecture is as follows: 1. Bluetooth Communication Module The TLSR8258 chip integrates the Bluetooth 5.0 radio frequency front end, supports data interaction with mobile terminals and host computer systems, and the transmission rate can reach 2 Mbps.

[0032] 2. LCD Display Unit (J4: SPI_LCD) Adopt the SPI bus protocol to drive the liquid crystal display module. Among them, the RS control line realizes the mode switching between the instruction register and the data register, and the BK backlight adjustment circuit realizes the PWM dimming function through the R41 - R43 (4.7KΩ ± 1%) precision resistor network.

[0033] 3. Human-Machine Interaction Components The mechanical button S1 is connected to GPIO27 through a pull-up resistor R19 (1KΩ ± 5%) and is configured with a falling-edge triggered interrupt mechanism; the status indication module is composed of L2 (red LED) and a current-limiting resistor R10 (470Ω ± 1%), and the output current is stabilized at 5mA ± 0.5mA.

[0034] In one embodiment, the protection and auxiliary circuit system design is as follows: Power Protection Module: Adopt TVS1 / TVS2 (6.5V) transient suppression diodes to construct a surge voltage suppression unit, cooperate with the NTC1 thermistor to realize real-time temperature monitoring, and effectively prevent the circuit from being damaged by overheating.

[0035] Reset Circuit Architecture: An RC delay network composed of an electrolytic capacitor C28 (1 μF) and a precision resistor R20 (6.8 MΩ) forms a power-on reset mechanism with a time constant τ = RC, ensuring that the MCU can be started only after the power supply voltage reaches a stable threshold.

[0036] Wireless energy coupling system: An LC parallel resonance network is jointly composed of a high-frequency ceramic capacitor C23 (18 pF), a chip capacitor C18 (1.2 pF), and a planar spiral coil L1. Its resonance frequency satisfies the relationship f = 1 / (2π√LC), achieving optimization of energy transfer efficiency.

[0037] The application scenarios of the present invention mainly include the following two implementation manners: Application scenario 1: Physical adsorption is achieved through a magnetic attraction component and a smartphone or other devices with magnetic attraction characteristics to ensure the stable fixation of the detection device. Based on the wireless reverse charging technology, the smartphone can continuously supply power to the magnetic adsorption type multi-functional intelligent detector and activate its working state. The detector integrates a variety of high-sensitivity and low-power sensor modules (including but not limited to carbon dioxide, formaldehyde, carbon monoxide, and ultraviolet sensors), and can perform real-time monitoring on the concentration of specific harmful substances in the environment. After the sensing unit converts the collected data into a standard electrical signal, it is transmitted to the mobile application (APP) through a Bluetooth 4.0 or higher communication protocol for data visualization. When the detection value exceeds the preset safety threshold, the system synchronously triggers a dual warning mechanism: both push real-time alarm information through the APP and activate the built-in red LED warning light of the detector. Users can customize the warning parameters through the application and remotely monitor the operating status of the device. The display unit adopts an energy-saving design scheme, and the opening and closing control of the liquid crystal screen is realized through the side mechanical button - in the normal state, the screen remains in the sleep state to reduce power consumption, and the display interface can be activated only by continuously pressing the button for 5 seconds. This interaction design effectively avoids the risk of accidental touch when using mobile devices in coordination.

[0038] Application scenario 2: In a stable power supply environment (such as an indoor fixed power supply or a mobile power supply access scenario), the physical support of the device can be established through a bracket support structure, and an external power supply can be connected using a USB Type-C data cable. In this working mode, the display screen remains constantly on, and the device performs the conventional detection and data transmission functions of environmental safety parameters under continuous power supply conditions.

[0039] In summary, the present invention uses the mobile phone wireless reverse power supply technology to provide energy for the magnetic multi-functional intelligent detector, and also supports multi-channel power supply by connecting to the power adapter or the USB ports of the computer and mobile phone through a USB cable. The device can be magnetically adsorbed on the surface of the mobile phone and is suitable for various indoor and outdoor use environments. It realizes an immediate power supply and immediate use power guarantee mechanism, supports rapid deployment and continuous use in multiple scenarios, effectively avoids the risk of power interruption, and ensures the continuity of safety monitoring.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A magnetic adsorption type multi-functional intelligent detector, comprising a housing, a bracket, a touch screen and a circuit part, characterized in that, The circuit part includes a sensor module, which is used to collect temperature and humidity, carbon dioxide, formaldehyde, carbon monoxide and ultraviolet information, and generate and output analog signals; a signal processing and conversion module, which receives the analog signals output by the sensor module, filters out interference through an RC network, and converts them into digital signals through a digital signal interface for output; a microprocessor, which receives and analyzes the digital signals output by the signal processing and conversion module, realizes data classification storage and abnormal threshold judgment; a wireless communication module, which is used to transmit the signals sent by the microprocessor and receive the control instructions sent by the user terminal to realize interaction with the user terminal.

2. The magnetic adsorption type multi-functional intelligent detector according to claim 1, characterized in that, The circuit part is arranged in the housing, the housing is arranged on the bracket, and the touch screen is arranged on the housing.

3. A magnetic adsorption type multi-functional intelligent detector according to claim 1, characterized in that, The multi-functional intelligent detector further includes a power supply module, and the power supply module includes a USB charging interface, which is used to input DC voltage and enter the circuit through the VBUS pin; a wireless charging coil, which is used for wireless energy reception, couples electromagnetic energy through the coil, and generates a VRECT voltage after rectification; a system power supply path, which receives the VRECT, directly supplies power to some sensor modules after capacitor filtering; or supplies power to the MCU and sensors after step-down through a voltage conversion circuit and capacitor filtering.

4. A magnetic adsorption type multi-functional intelligent detector according to claim 1, characterized in that, The sensor module includes a temperature and humidity sensor, a carbon dioxide sensor, a formaldehyde sensor, a carbon monoxide sensor and an ultraviolet sensor.

5. A magnetic adsorption type multi-functional intelligent detector according to claim 1, characterized in that, The signal processing and conversion module includes analog signal processing, which filters out interference through an RC network, provides gain through an operational amplifier, and ensures that the signal amplitude adapts to the ADC input range of the MCU; a digital signal interface, which includes an I²C bus connecting all digital sensors, and pull-up resistors R15 / R16 to ensure signal integrity, and an SPI interface for driving the display screen.

6. The magnetic adsorption type multi-functional intelligent detector according to claim 1, characterized in that, The microprocessor includes I / O allocation, a clock system and a wireless radio frequency part, and an external crystal oscillator is set in the clock system to provide the main clock.

7. A magnetic attraction type multi-functional intelligent detector according to claim 6, characterized in that, The I / O allocation includes GPIO control, which is provided with management buttons, an LED and an LCD reset button; ADC acquisition, where ADC_CO, ADC_UV, and ADC_CH2O respectively receive the analog signals of CO, ultraviolet rays, and formaldehyde; a communication interface, I²C connects the sensors, SPI controls the display screen, and UART reserves a debugging interface.

8. A magnetic adsorption type multi-functional intelligent detector according to claim 1, characterized in that, The wireless communication module includes Bluetooth communication, with a built-in Bluetooth 5.0 module to realize data transmission with mobile phones / host computers; LCD display, which sets an SPI interface to drive the display screen, the RS pin controls the command / data mode, and the BK pin adjusts the backlight brightness through R41-R43; user interaction, the button is pulled up through a resistor, and the MCU interrupt is triggered to realize function switching; the LED is current-limited through a resistor to indicate the working state.

9. A magnetic adsorption type multi-functional intelligent detector according to claim 1, characterized in that, The multi-functional intelligent detector further includes a power supply protection circuit, which uses TVS1 / TVS2 to suppress surges and NTC1 to monitor the temperature.

10. A magnetic adsorption type multi-functional intelligent detector according to claim 1, characterized in that, The multi-functional intelligent detector forms a power-on reset delay through resistor C28 and resistor R20 to ensure the stable startup of the MCU; resonates through capacitor C23 and C18 with coil L1 to optimize the energy transmission efficiency.

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