Campus safety monitoring equipment

Abstract

The utility model belongs to the technical field of security equipment, and particularly relates to campus safety monitoring equipment, which comprises a shell and a circuit board arranged in the shell, and the shell is fixedly arranged on the side surface of a wall; the circuit board is provided with a circuit structure, and the circuit structure comprises a master control MCU module, and a power conversion module, a radar module, an air environment sensor and an Ethernet communication module which are connected with the master control MCU module. The power supply conversion module supplies power through a POE separator and provides various power supplies; the radar module is used for personnel counting and personnel trajectory tracking. The air environment sensor is used for collecting air environment information; and the Ethernet communication module uploads monitoring information to a server through a POE separator. According to the invention, on the premise of not leaking personal sensitive information, real-time non-inductive monitoring is carried out on the hidden area of the campus, and the overall safety management capability of the campus is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of security equipment, and in particular relates to a campus safety monitoring device. Background Art

[0002] Campuses are places where large numbers of students gather. This can lead to group smoking and friction, and can also lead to fights, chases, and other behaviors that can cause injuries. These and other safety issues frequently occur on campus, seriously impacting the normal educational and teaching process and the healthy development of students. Security in hidden areas, such as restrooms and dormitories, is crucial for campus safety monitoring. To mitigate risky student behavior, comprehensive campus patrols are essential. Traditional manual inspections are inefficient, prone to missed detections, and waste significant manpower. To reduce the burden of patrol management, current campus security patrols utilize video surveillance technology. Cameras are installed throughout the campus, allowing central monitoring to monitor every corner of the campus and mitigate risky student behavior. However, video surveillance struggles to provide comprehensive coverage and comprehensive security in areas where sensitive personal information is stored. Summary of the Invention

[0003] The purpose of this utility model is to address the problems that the existing security equipment in schools is unable to prevent and intervene in campus security incidents in a timely manner, especially the problems that security control in hidden areas is difficult to prevent, determine and identify. A campus security monitoring device is proposed to achieve real-time and non-sensing monitoring of hidden areas on campus without leaking personal sensitive information.

[0004] In order to achieve the above purpose, the technical solutions adopted are:

[0005] A campus security monitoring device includes a housing and a circuit board disposed within the housing, wherein the housing is fixedly mounted on the side of a wall; the circuit board is provided with a circuit structure comprising a main control MCU module and a power conversion module connected to the main control MCU module, a radar module, an air environment sensor, and an Ethernet communication module; the power conversion module is powered by a POE splitter and provides multiple power sources; the radar module is used for counting people and tracking their trajectories; the air environment sensor is used for collecting air environment information; and the Ethernet communication module uploads monitoring information to a server via the POE splitter.

[0006] According to the campus safety monitoring device of the present invention, further, the main control MCU module includes an MCU and peripheral circuits, and the peripheral circuits include a 25MHz active crystal oscillator, a debugging interface, a program download port, a power monitoring circuit, a watchdog reset circuit and an ADC resistor voltage divider acquisition circuit.

[0007] According to the campus safety monitoring device of the present invention, further, the power conversion module includes a 12V to 5V power conversion chip and a 12V to 3.3V power conversion chip, which are used to provide 5V and 3.3V DC power supplies.

[0008] According to the campus safety monitoring equipment of the present invention, further, the radar module adopts a 60GHZ millimeter wave radar.

[0009] According to the campus safety monitoring equipment of the present invention, further, the air environment sensor includes a TVOC sensor, a PM2.5 sensor and a temperature and humidity sensor; the TVOC sensor is connected to the main control MCU module through the UART interface, the temperature and humidity sensor is connected to the main control MCU module through the I2C interface, and the PM2.5 sensor is connected to the main control MCU module through the UART interface.

[0010] According to the campus safety monitoring device of the present invention, further, the Ethernet communication module adopts a PHY chip, the PHY chip is connected to the MAC interface of the main control MCU module through the RMII interface, and the PHY chip communicates with the outside through the RJ45 network port.

[0011] According to the campus safety monitoring device of the present invention, further, the circuit structure also includes a voice playback module, and the voice playback module includes a TTS voice synthesis chip and an audio power amplifier.

[0012] According to the campus safety monitoring device of the present invention, further, the circuit structure also includes a recording module, and the recording module includes a noise reduction microphone module and an audio codec.

[0013] According to the campus safety monitoring device of the present invention, the device further includes a human-computer interaction module, and the human-computer interaction module includes an indicator light and a reset button arranged outside the shell.

[0014] According to the campus safety monitoring device of the present invention, further, a plurality of ventilation holes are evenly opened on the front of the shell; interfaces are left at the lower back of the shell, namely a DC power port, an indicator light port, an RJ45 network port and a reset button.

[0015] The beneficial effects achieved by adopting the above technical solution are:

[0016] This new campus security monitoring device counts people in hidden indoor areas and monitors abnormal behavior. It uses millimeter-wave radar monitoring instead of cameras, preventing the leakage of sensitive personal information while enabling real-time monitoring of personnel. The device also integrates a multi-element air environment sensor to monitor the air quality in the monitored area. It also integrates voice playback and recording capabilities, providing voice reminders and recordings within the monitored area. When the surrounding environment changes or an abnormality is detected, it promptly alerts the indoor liaison and relevant personnel. This device enhances overall campus safety management capabilities and creates a harmonious campus environment for young people. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings of the embodiments of the present invention. The drawings are only used to illustrate some embodiments of the present invention, and are not intended to limit all embodiments of the present invention to these drawings.

[0018] Figure 1 This is a circuit diagram of a campus safety monitoring device according to an embodiment of the present invention;

[0019] Figure 2 This is a principle block diagram of the main control MCU module of an embodiment of the utility model;

[0020] Figure 3 This is a functional block diagram of a power conversion module according to an embodiment of the present utility model;

[0021] Figure 4 This is a principle block diagram of the air environment sensor according to an embodiment of the present utility model;

[0022] Figure 5 This is a functional block diagram of an Ethernet communication module according to an embodiment of the present invention;

[0023] Figure 6 This is a functional block diagram of the voice playback module of an embodiment of the present utility model;

[0024] Figure 7 This is a functional block diagram of a recording module according to an embodiment of the present invention;

[0025] Figure 8 This is an interface diagram of the campus safety monitoring equipment according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings of specific embodiments of the present invention to clearly and completely describe the exemplary embodiments of the present invention. Unless otherwise defined, technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field.

[0027] like Figure 1 As shown, the campus security monitoring device disclosed in this embodiment includes a housing and a circuit board arranged in the housing. The back of the housing is provided with a circular fixing cover, which is connected to the housing by a rotating snap. The circular fixing cover can be connected to the adjustment bracket installed on the side of the wall by an M3 screw. A circuit structure is provided on the circuit board, and the circuit structure includes a main control MCU module and a power conversion module connected to the main control MCU module, a radar module, an air environment sensor, an Ethernet communication module, a voice playback module and a recording module to meet the basic functional requirements of the monitoring equipment. The campus security monitoring equipment is powered and connected to the network through an external POE separator.

[0028] The main control MCU module has a main frequency of 168MHz, 196KB SRAM, 1MB Flash, 210 DMIPS, and the hardware interface of the main control MCU module supports UART, I2S, SPI, I2C, ADC\DAC, Ethernet MAC, power supply range of 1.8V~3.6V, operating temperature range of -40℃~85℃, and packaged in LQFP144, which meets the performance index requirements of the main control MCU module for concealed area monitoring terminals. Figure 2 As shown, the main control MCU module uses an external 25MHz active crystal oscillator. The main control MCU module is designed with an SWD program download port and a UART debug port. In addition, the module has an external SPI interface and 64MByte NOR_Flash for data storage. The main control MCU module is designed with MCU power monitoring circuit and watchdog reset circuit. When the MCU power supply is abnormal or the program is out of control, it can control the MCU to reset. The main control MCU module is designed with an ADC resistor divider voltage acquisition circuit for collecting the power supply voltages of 12V, 5V, and 3.3V.

[0029] The power conversion module includes a 12V to 5V power conversion chip and a 12V to 3.3V power conversion chip, which realizes 12V to 5V power conversion and 12V to 3.3V power conversion; the power conversion chip has an input voltage range of 4.5V~28V, an output current of 3A, a fixed switching frequency of 400KHz, and has overcurrent, overvoltage protection, and thermal shutdown. The power conversion module principle block diagram is as follows Figure 3 shown.

[0030] The radar module uses a 60GHZ millimeter-wave radar to count the number of people in the monitoring area and track their trajectories.

[0031] like Figure 4As shown in the figure, the air environment sensor mainly monitors smoke, odor, and other air environment abnormalities in the monitoring area. If smoke, odor, or other air environment abnormalities occur in the monitoring area, an alarm will be issued in a timely manner. The air environment sensor includes a TVOC (total volatile organic compound) sensor, a PM2.5 sensor, and a temperature and humidity sensor. The TVOC sensor connects to the main control MCU module via the UART interface, the temperature and humidity sensor connects to the main control MCU module via the I2C interface, and the PM2.5 sensor connects to the main control MCU module via the UART interface for information exchange.

[0032] The Ethernet communication module uses a PHY chip, which is connected to the MAC interface of the main control MCU module through the RMII interface. The Ethernet differential signal after passing through the PHY chip communicates with the outside through the RJ45 network port with its own network transformer. The principle block diagram of the Ethernet communication module is as follows: Figure 5 shown.

[0033] The device has a voice playback function. When the device detects an abnormal state in the area, it can issue a voice alarm prompt. The voice playback module includes a TTS voice synthesis chip and a D / AB class audio power amplifier. The TTS voice synthesis chip receives the text data to be synthesized through the UART serial port to realize the conversion of text to speech (or TTS voice). The audio power amplifier amplifies the power of the analog audio signal and drives the cavity speaker to play the voice. The principle block diagram of the voice playback module is shown below. Figure 6 shown.

[0034] The device has a recording function, which can record the monitored area and upload it to the server. The recording module includes a noise reduction microphone module and an audio codec. The noise reduction microphone module performs noise reduction processing on the voice signal picked up by the microphone, and then outputs an analog audio signal with higher fidelity of human voice to the audio codec. After the audio codec converts it into a digital audio signal, it is sent to the main control MCU module through the I2S bus. The principle block diagram of the recording module is shown below. Figure 7 shown.

[0035] The device also includes a human-machine interaction module, which includes an indicator light and a reset button located on the outside of the housing. The indicator light uses a direct-insert F3mm red and green dual-hole indicator light to indicate the device's operating status. The reset button is a direct-insert touch button that resets the device if an abnormality occurs.

[0036] The shell is a co-molded plastic shell with dimensions of 190mm*190mm*40mm (length, width and height). There are multiple air vents evenly distributed on the front of the shell to facilitate the entry of indoor gas into the device. There is an opening at the bottom of the back of the shell, which is used as the interface of the monitoring terminal. From left to right, they are the DC power port, indicator light port, RJ45 network port and reset button. The DC power port is connected to an external POE splitter to power the device, and the RJ45 network port is connected to an external POE splitter to exchange information with the server. The internal interface is designed with a UART debug port and an SWD program download interface for device debugging and program downloading; the device interface is as follows: Figure 8 shown.

[0037] This new campus security monitoring device uses millimeter-wave radar to count people and track their movements in hidden indoor areas while protecting users' personal sensitive information. The device also integrates various air environment sensors to detect temperature, humidity, PM2.5, PM10, TVOC, smoke, and other air quality. The device also includes built-in voice playback and recording modules, allowing remote control of the monitoring terminal for voice playback and recording. The device uses POE communication to upload information collected by the monitoring terminal to a server, which performs statistical analysis on the information uploaded by the monitoring terminal and displays the real-time status. It also issues alarms for abnormal human behavior, gatherings, or air environment in the monitoring area.

[0038] Compared to cameras, millimeter-wave radar can be installed in sensitive areas without the risk of personal information leakage. The server identifies and determines situations such as crowds, conflicts, and smoke, eliminating the need for manual inspections. When an alarm is detected, it pushes it to the platform in real time and provides a voice reminder, allowing security personnel to take timely action based on the situation.

[0039] While preferred embodiments for implementing the present invention have been described in detail above, it should be understood that these embodiments are provided for illustrative purposes only and are not intended to limit the scope, applicability, or configuration of the present invention in any way. The scope of protection of the present invention is defined by the appended claims and their equivalents. Persons skilled in the art may make numerous modifications to the aforementioned embodiments based on the teachings of this invention, and such modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A campus safety monitoring device, characterized in that: The device comprises a shell and a circuit board arranged inside the shell, wherein the shell is fixedly mounted on the side of a wall; the circuit board is provided with a circuit structure, which includes a main control MCU module and a power conversion module connected to the main control MCU module, a radar module, an air environment sensor and an Ethernet communication module; the power conversion module is powered by a POE splitter and provides multiple power sources; the radar module is used for people counting and people trajectory tracking; the air environment sensor is used for collecting air environment information; the Ethernet communication module uploads monitoring information to a server through a POE splitter.

2. The campus safety monitoring device according to claim 1, characterized in that: The main control MCU module includes an MCU and peripheral circuits, wherein the peripheral circuits include a 25MHz active crystal oscillator, a debugging interface, a program download port, a power monitoring circuit, a watchdog reset circuit and an ADC resistor voltage division acquisition circuit.

3. The campus safety monitoring device according to claim 1, characterized in that: The power conversion module includes a 12V to 5V power conversion chip and a 12V to 3.3V power conversion chip, which are used to provide 5V and 3.3V DC power supplies.

4. The campus safety monitoring device according to claim 1, characterized in that: The radar module uses a 60GHZ millimeter wave radar.

5. The campus safety monitoring device according to claim 1, characterized in that: The air environment sensor includes a TVOC sensor, a PM2.5 sensor and a temperature and humidity sensor; the TVOC sensor is connected to the main control MCU module through a UART interface, the temperature and humidity sensor is connected to the main control MCU module through an I2C interface, and the PM2.5 sensor is connected to the main control MCU module through a UART interface.

6. The campus safety monitoring device according to claim 1, characterized in that: The Ethernet communication module adopts a PHY chip, which is connected to the MAC interface of the main control MCU module through the RMII interface, and the PHY chip communicates with the outside through the RJ45 network port.

7. The campus safety monitoring device according to claim 1, characterized in that: The circuit structure further includes a voice playing module, which includes a TTS voice synthesis chip and an audio power amplifier.

8. The campus safety monitoring device according to claim 1, characterized in that: The circuit structure further includes a recording module, which includes a noise reduction microphone module and an audio codec.

9. The campus safety monitoring device according to claim 6, characterized in that: The device further comprises a human-computer interaction module, which comprises an indicator light and a reset button arranged outside the housing.

10. The campus safety monitoring device according to claim 9, characterized in that: The front of the shell is evenly provided with a plurality of ventilation holes; the lower back of the shell is provided with interfaces, which are a DC power port, an indicator light port, an RJ45 network port and a reset button.

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