Intelligent truck security system

Abstract

The utility model provides an intelligent truck security and protection system, which belongs to the technical field of vehicle security and protection systems, and is characterized in that the environment temperature of goods in a container of a truck is continuously monitored through a temperature monitoring unit, and parameters such as eye blinking frequency and facial expression of a driver are continuously acquired through a camera monitoring unit; the ultrasonic sensing unit continuously detects the distance between an object around a truck and the truck, the liquid level sensing unit and the vibration sensing unit respectively monitor the liquid level of fuel oil in an oil tank and the vibration condition of the oil tank in real time, and the acceleration sensing unit monitors the acceleration of the truck in real time. When the main control module detects that the truck is abnormal, a prompt signal is immediately sent out through the buzzer alarm unit to remind a truck owner, so that all-directional intelligent security and protection of the truck are achieved, quick response can be made to emergencies, and the safety and reliability of the truck are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle security systems, and particularly relates to an intelligent truck security system. Background Art

[0002] With the rapid development of the freight industry, the safety problems faced by trucks during transportation have become increasingly prominent. Traditional truck safety measures, such as mechanical locks and simple alarm systems, are no longer able to meet the high requirements for safety and protection in modern freight transportation. During operation, trucks not only face risks such as driver fatigue and distracted driving, but also may encounter situations such as cargo theft and fuel theft. In addition, during long-distance transportation, due to complex environments, long hours, and important cargo, trucks often require more comprehensive safety protection measures. Currently, although there are some vehicle security systems on the market, these systems often have single functions and are difficult to cope with complex safety requirements.

[0003] Therefore, there is an urgent need for a comprehensive intelligent security system that can monitor the vehicle status, cargo conditions, and driver status in real time and can effectively prevent fuel theft and collision accidents. Summary of the Utility Model

[0004] To solve the shortcomings and deficiencies of the prior art, an intelligent truck security system is provided, which can solve the problem that the existing vehicle security system has single functions and is difficult to cope with complex safety requirements.

[0005] An intelligent truck security system provided for achieving the purpose of the utility model includes a truck. A temperature monitoring unit is installed in the cargo box of the truck to monitor the temperature of the environment where the cargo is located in the cargo box. A camera monitoring unit is installed in the front of the cab of the truck to collect the blinking frequency of the driver's eyes and facial expression signals. An ultrasonic sensing unit is installed on the outer body of the truck to monitor the distance to surrounding objects of the truck. A liquid level sensing unit and a vibration sensing unit are installed in the fuel tank of the truck to monitor the liquid level change of the oil in the fuel tank and the vibration of the fuel tank. An acceleration sensing unit is also installed in the cab of the truck to monitor the acceleration change of the truck in real time. The temperature monitoring unit, camera monitoring unit, ultrasonic sensing unit, liquid level sensing unit, vibration sensing unit, and acceleration sensing unit are all connected to a main control module, so as to transmit the collected signals to the main control module. The main control module is connected to a buzzer alarm unit to issue an alarm prompt to the driver. The temperature monitoring unit, camera monitoring unit, ultrasonic sensing unit, liquid level sensing unit, vibration sensing unit, acceleration sensing unit, buzzer alarm unit, and main control module are all connected to a power supply module for real-time power supply.

[0006] As a further improvement of the above solution, the main control module includes a control unit, a clock unit, and a filtering unit; the control unit includes chips U1, U12, sockets P1 - P2, resistors R2 - R4, capacitors C1, C10, and a push-button switch RES. Pins 3 - 6, 12 - 13, 18 - 19, 21 - 22, 38 - 43 of the chip U1 are respectively connected to PC14 - PC15, OSC_IN, OSC_OUT, PA2 - PA3, PB0 - PB1, PB10 - PB11, PA15, PB3 - PB7. Pin 7 is connected to one end of the resistor R2, the positive electrode of the capacitor C1, and one end of the push-button switch RES. Pins 30 - 31 are respectively connected to pins 4, 3 of the chip U12. Pin 34 is connected to pin 2 of the socket P2. Pin 37 is connected to pin 3 of the socket P2. Pin 44 is connected to one end of the resistor R4. Pins 9, 24, 36, 48 are all connected to the 3.3V power supply. Pins 8, 23, 35, 47 are all grounded. The other end of the resistor R2 is connected to the 3.3V power supply. The negative electrode of the capacitor C1 is connected to the other end of the push-button switch RES and then grounded. Pin 1 of the chip U12 is connected to the 3.3V power supply, and pin 2 is grounded. Pin 1 of the socket P2 is connected to one end of the capacitor C10 and then grounded. Pin 4 of the socket P2 is connected to the other end of the capacitor C10 and then grounded. The other end of the resistor R4 is connected to pin 3 of the socket P1. Pins 1 - 2 of the socket P1 are both connected to the 3.3V power supply. Pin 4 is connected to one end of the resistor R3. Pins 5 - 6 are both grounded. The other end of the resistor R3 is connected to BOOT1. The clock unit includes crystal oscillators X1, Y1, resistor R1, and capacitors C2 - C5. Connector 1 of the crystal oscillator X1 is connected to one end of the capacitor C5, one end of the resistor R1, and OSC_OUT. Connector 2 is connected to one end of the capacitor C4, the other end of the resistor R1, and OSC_IN. Connector 1 of the crystal oscillator Y1 is connected to one end of the capacitor C3 and PC15. Connector 2 is connected to one end of the capacitor C2 and PC14. The other ends of the capacitors C2 - C5 are all grounded. The filtering unit includes capacitors C11 - C14. One ends of the capacitors C11 - C14 are all connected to the 3V3 power supply, and the other ends are all grounded.

[0007] As a further improvement of the above solution, the temperature monitoring unit includes a chip U10 and a resistor R5. Pin 1 of the chip U10 is grounded. Pin 2 is connected to one end of the resistor R5 and PB1. Pin 3 is connected to the other end of the resistor R5 and the VCC power supply.

[0008] As a further improvement of the above solution, the camera monitoring unit includes chips U7 - U9. The CSI terminal of chip U7 is connected to the CSI terminal of chip U8. The pin 12 of chip U8 is connected to the 3.3V power supply, pin 13 is grounded, pins 15 - 16 are respectively connected to pins 6 - 5 of chip U9, pin 17 is grounded after being connected to pin 13 of chip U9, and pin 18 is connected to pin 12 of chip U9 and then connected to the 3.3V power supply. Pins 7 - 8 of chip U9 are respectively connected to PA3 and PA2.

[0009] As a further improvement of the above solution, the ultrasonic sensing unit includes chip U4. The pin 1 of chip U4 is connected to the VCC power supply, pins 2 - 3 are connected to PB4 and PB3, and pin 5 is grounded.

[0010] As a further improvement of the above solution, the liquid level sensing unit includes chip U5. The pin 1 of chip U5 is connected to the 3.3V power supply, pin 2 is connected to PB5, and pin 3 is grounded.

[0011] As a further improvement of the above solution, the vibration sensing unit includes chip U6. The pin 1 of chip U6 is connected to PB0, pin 2 is grounded, and pin 3 is connected to the 3.3V power supply.

[0012] As a further improvement of the above solution, the acceleration sensing unit includes chip U13. The pin 1 of chip U13 is connected to the 3.3V power supply, pin 2 is grounded, and pins 3 - 4 are respectively connected to PB10 - PB11.

[0013] As a further improvement of the above solution, the buzzer alarm unit includes a speaker LS1, a triode Q1, and a resistor R8. The emitter of triode Q1 is connected to the 3.3V power supply, the base is connected to one end of resistor R8, and the collector is connected to one end of speaker LS1. The other end of resistor R8 is connected to PA15, and the other end of speaker LS1 is grounded.

[0014] As a further improvement of the above solution, the power supply module includes chips U2 - U3, capacitors C6 - C9, and a diode TVS. The pin 1 of chip U2 is grounded after being connected to the positive pole of diode TVS, one ends of capacitors C6 - C7, and pin 2 of chip U3. Pin 5 is connected to the negative pole of diode TVS, the other end of capacitor C6, pins 1 and 3 of chip U3, and then connected to the VCC power supply. The pin 4 of chip U3 is connected to the other end of capacitor C7, and pin 5 is connected to one ends of capacitors C8 - C9 and the 3.3V power supply. The other ends of capacitors C8 - C9 are grounded.

[0015] The beneficial effects of the present utility model are:

[0016] Compared with the prior art, an intelligent security system for trucks provided by the present utility model has the following advantages:

[0017] ① The temperature monitoring unit continuously monitors the ambient temperature of the goods in the truck's cargo box. When the temperature of the goods exceeds the set range or abnormal vibration occurs, the main control module issues an alarm through the buzzer alarm unit to prevent the goods from being damaged;

[0018] ② The camera monitoring unit continuously collects parameters such as the blinking frequency of the driver's eyes and facial expressions. The main control module judges in real time whether the driver is in a fatigued or distracted state. When abnormal driver behavior is detected, an alarm is issued through the buzzer alarm unit to remind the driver to pay attention to safety;

[0019] ③ The ultrasonic sensing unit continuously detects the distance between the objects around the truck and the truck. When this distance is lower than the set safety threshold, the main control module issues an alarm through the buzzer alarm unit to remind the driver to take protective measures, thereby preventing the occurrence of collision accidents;

[0020] ④ The liquid level sensing unit and the vibration sensing unit respectively monitor the fuel liquid level in the fuel tank and the vibration of the fuel tank in real time. When the liquid level drops abnormally rapidly or the fuel tank is subjected to abnormal vibration, the main control module issues an anti-theft alarm signal through the buzzer alarm unit to remind the vehicle owner to guard against fuel theft;

[0021] ⑤ The acceleration sensing unit monitors the acceleration of the truck in real time. When the main control module detects that the acceleration of the truck decreases abnormally, it immediately issues a prompt signal through the buzzer alarm unit to remind the truck owner. At the same time, the acceleration sensing unit can also provide real-time data to help the vehicle owner take emergency treatment measures in case of an emergency.

[0022] In summary, this security system not only realizes the full-range intelligent security of the truck, but also can make a quick response to emergencies, effectively improving the safety and reliability of the truck. Brief Description of the Drawings

[0023] Figure 1 is the connection schematic diagram between various parts in the present utility model;

[0024] Figure 2 is the circuit connection schematic diagram of the control unit in the present utility model;

[0025] Figure 3 is the circuit connection schematic diagram of the filtering unit in the present utility model;

[0026] Figure 4 is the circuit connection schematic diagram of the temperature monitoring unit in the present utility model;

[0027] Figure 5Schematic diagram of the circuit connection of the camera monitoring unit in the present utility model;

[0028] Figure 6 Schematic diagram of the circuit connection of the ultrasonic sensing unit in the present utility model;

[0029] Figure 7 Schematic diagram of the circuit connection of the liquid level sensing unit in the present utility model;

[0030] Figure 8 Schematic diagram of the circuit connection of the vibration sensing unit in the present utility model;

[0031] Figure 9 Schematic diagram of the circuit connection of the liquid level sensing unit in the present utility model;

[0032] Figure 10 Schematic diagram of the circuit connection of the acceleration sensing unit in the present utility model;

[0033] Figure 11 Schematic diagram of the circuit connection of the buzzer alarm unit in the present utility model;

[0034] Figure 12 Schematic diagram of the circuit connection of the power supply module in the present utility model. Detailed implementation manners

[0035] The following further elaborates the detailed implementation manners of the present utility model in conjunction with the accompanying drawings:

[0036] According to Figure 1 As shown, the present utility model provides an intelligent truck security system, including a truck. A temperature monitoring unit is installed in the cargo box of the truck to monitor the temperature of the environment where the goods in the cargo box are located. A camera monitoring unit is installed in the front of the cab of the truck to collect the blinking frequency of the driver's eyes and facial expression signals. An ultrasonic sensing unit is installed on the outer body of the truck to monitor the distance to the surrounding objects of the truck. A liquid level sensing unit and a vibration sensing unit are installed in the fuel tank of the truck to monitor the liquid level change of the oil in the fuel tank and the vibration of the fuel tank. An acceleration sensing unit is also installed in the cab of the truck to monitor the acceleration change of the truck in real time. The temperature monitoring unit, camera monitoring unit, ultrasonic sensing unit, liquid level sensing unit, vibration sensing unit, and acceleration sensing unit are all connected to the main control module, so as to transmit the collected signals to the main control module. The main control module is connected to the buzzer alarm unit to send an alarm prompt to the driver. The temperature monitoring unit, camera monitoring unit, ultrasonic sensing unit, liquid level sensing unit, vibration sensing unit, acceleration sensing unit, buzzer alarm unit, and main control module are all connected to the power supply module for real-time power supply.

[0037] Among them, the main control module includes a control unit, a clock unit, and a filtering unit;

[0038] As Figure 2 shown, the control unit includes chips U1, U12, sockets P1 - P2, resistors R2 - R4, capacitors C1, C10, and a push-button switch RES. Pins 3 - 6, 12 - 13, 18 - 19, 21 - 22, 38 - 43 of chip U1 are respectively connected to PC14 - PC15, OSC_IN, OSC_OUT, PA2 - PA3, PB0 - PB1, PB10 - PB11, PA15, PB3 - PB7. Pin 7 is connected to one end of resistor R2, the positive electrode of capacitor C1, and one end of the push-button switch RES. Pins 30 - 31 are respectively connected to pins 4, 3 of chip U12. Pin 34 is connected to pin 2 of socket P2. Pin 37 is connected to pin 3 of socket P2. Pin 44 is connected to one end of resistor R4. Pins 9, 24, 36, 48 are all connected to the 3.3V power supply. Pins 8, 23, 35, 47 are all grounded. The other end of resistor R2 is connected to the 3.3V power supply. The negative electrode of capacitor C1 is connected to the other end of the push-button switch RES and then grounded. Pin 1 of chip U12 is connected to the 3.3V power supply, and pin 2 is grounded. Pin 1 of socket P2 is connected to one end of capacitor C10 and then grounded, and pin 4 is connected to the other end of capacitor C10 and then grounded. The other end of resistor R4 is connected to pin 3 of socket P1. Pins 1 - 2 of socket P1 are both connected to the 3.3V power supply. Pin 4 is connected to one end of resistor R3. Pins 5 - 6 are both grounded. The other end of resistor R3 is connected to BOOT1. As Figure 3 shown, the clock unit includes crystal oscillators X1, Y1, resistor R1, and capacitors C2 - C5. Connector 1 of crystal oscillator X1 is connected to one end of capacitor C5, one end of resistor R1, and OSC_OUT. Connector 2 is connected to one end of capacitor C4, the other end of resistor R1, and OSC_IN. Connector 1 of crystal oscillator Y1 is connected to one end of capacitor C3 and PC15. Connector 2 is connected to one end of capacitor C2 and PC14. The other ends of capacitors C2 - C5 are all grounded. As Figure 4 shown, the filtering unit includes capacitors C11 - C14. One ends of capacitors C11 - C14 are all connected to the 3V3 power supply, and the other ends are all grounded.

[0039] As Figure 5 shown, the temperature monitoring unit includes chip U10 and resistor R5. Pin 1 of chip U10 is grounded. Pin 2 is connected to one end of resistor R5 and PB1. Pin 3 is connected to the other end of resistor R5 and the VCC power supply.

[0040] As Figure 6As shown, the camera monitoring unit includes chips U7 - U9. The CSI terminal of chip U7 is connected to the CSI terminal of chip U8. The pin 12 of chip U8 is connected to the 3.3V power supply, pin 13 is grounded, pins 15 - 16 are respectively connected to pins 6 - 5 of chip U9, pin 17 is grounded after being connected to pin 13 of chip U9, and pin 18 is connected to the 3.3V power supply after being connected to pin 12 of chip U9. Pins 7 - 8 of chip U9 are respectively connected to PA3 and PA2.

[0041] As Figure 7 shown, the ultrasonic sensing unit includes chip U4. The pin 1 of chip U4 is connected to the VCC power supply, pins 2 - 3 are connected to PB4 and PB3, and pin 5 is grounded.

[0042] As Figure 8 shown, the liquid level sensing unit includes chip U5. The pin 1 of chip U5 is connected to the 3.3V power supply, pin 2 is connected to PB5, and pin 3 is grounded.

[0043] As Figure 9 shown, the vibration sensing unit includes chip U6. The pin 1 of chip U6 is connected to PB0, pin 2 is grounded, and pin 3 is connected to the 3.3V power supply.

[0044] As Figure 10 shown, the acceleration sensing unit includes chip U13. The pin 1 of chip U13 is connected to the 3.3V power supply, pin 2 is grounded, and pins 3 - 4 are respectively connected to PB10 - PB11.

[0045] As Figure 11 shown, the buzzer alarm unit includes horn LS1, triode Q1, and resistor R8. The emitter of triode Q1 is connected to the 3.3V power supply, the base is connected to one end of resistor R8, and the collector is connected to one end of horn LS1. The other end of resistor R8 is connected to PA15, and the other end of horn LS1 is grounded.

[0046] As Figure 12 shown, the power supply module includes chips U2 - U3, capacitors C6 - C9, and diode TVS. The pin 1 of chip U2 is grounded after being connected to the positive pole of diode TVS, one ends of capacitors C6 - C7, and pin 2 of chip U3. Pin 5 is connected to the negative pole of diode TVS, the other end of capacitor C6, pins 1 and 3 of chip U3, and then connected to the VCC power supply. The pin 4 of chip U3 is connected to the other end of capacitor C7, and pin 5 is connected to one ends of capacitors C8 - C9 and the 3.3V power supply. The other ends of capacitors C8 - C9 are grounded.

[0047] The present utility model provides an intelligent security system for freight trucks, which has the following functions:

[0048] ① The temperature monitoring unit continuously monitors the ambient temperature of the goods in the cargo box of the freight truck. When the temperature of the goods exceeds the set range or abnormal vibration occurs, the main control module issues an alarm through the buzzer alarm unit to prevent the goods from being damaged;

[0049] ② The camera monitoring unit continuously collects parameters such as the blinking frequency of the driver's eyes and facial expressions. The main control module judges in real time whether the driver is in a fatigued or distracted state. When abnormal driver behavior is detected, an alarm is issued through the buzzer alarm unit to remind the driver to pay attention to safety;

[0050] ③ The ultrasonic sensing unit continuously detects the distance between the objects around the freight truck and the truck. When the distance is lower than the set safety threshold, the main control module issues an alarm through the buzzer alarm unit to remind the driver to take protective measures, thereby preventing the occurrence of collision accidents;

[0051] ④ The liquid level sensing unit and the vibration sensing unit respectively monitor the fuel liquid level in the fuel tank and the vibration of the fuel tank in real time. When the liquid level drops abnormally rapidly or the fuel tank is abnormally vibrated, the main control module issues an anti-theft alarm signal through the buzzer alarm unit to remind the vehicle owner to guard against fuel theft;

[0052] ⑤ The acceleration sensing unit monitors the acceleration of the freight truck in real time. When the main control module detects that the acceleration of the freight truck decreases abnormally, it immediately issues a prompt signal through the buzzer alarm unit to remind the freight truck owner. At the same time, the acceleration sensing unit can also provide real-time data to help the vehicle owner take emergency treatment measures in case of an emergency.

[0053] As can be seen from the above, the security system not only realizes the all-round intelligent security of the freight truck, but also can make a rapid response to emergencies, effectively improving the safety and reliability of the freight truck.

[0054] The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments can be combined with each other to form new embodiments. The above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Any modification or equivalent replacement that does not depart from the spirit and scope of the present utility model shall be covered by the technical solutions of the present utility model.

Claims

1. An intelligent truck security system, comprising a truck, characterized in that: A temperature monitoring unit is installed in the cargo box of the truck to monitor the temperature of the environment in which the goods are located in the cargo box. A camera monitoring unit is installed in front of the cab of the truck to collect the driver's eye blinking frequency and facial expression signals. An ultrasonic sensor unit is installed on the outer body of the truck to monitor the distance of objects around the truck. A liquid level sensing unit and a vibration sensing unit are installed in the fuel tank of the truck to monitor the liquid level changes of the oil in the tank and the vibration of the tank. An acceleration sensor unit is also installed in the cab of the truck. , used to monitor the acceleration changes of the truck in real time, the temperature monitoring unit, the camera monitoring unit, the ultrasonic sensor unit, the liquid level sensing unit, the vibration sensor unit, and the acceleration sensor unit are all connected to the main control module, so as to transmit the collected signals to the main control module, and the main control module is connected to the buzzer alarm unit to issue an alarm prompt to the driver, the temperature monitoring unit, the camera monitoring unit, the ultrasonic sensor unit, the liquid level sensing unit, the vibration sensor unit, the acceleration sensor unit, the buzzer alarm unit, and the main control module are all connected to the power module for real-time power supply.

2. The intelligent truck security system according to claim 1, characterized in that: The main control module includes a control unit, a clock unit and a filter unit; the control unit includes chips U1, U12, sockets P1-P2, resistors R2-R4, capacitors C1, C10 and a key switch RES, and pins 3-6, 12-13, 18-19, 21-22, 38-43 of the chip U1 are connected to PC14-PC15, OSC_IN, OSC_OUT, PA2-PA3, PB0-PB1, PB10-PB11, PA15, PB3-PB7, and pin 7 is connected to One end of the resistor R2, the positive electrode of the capacitor C1 and one end of the key switch RES are connected, pins 30-31 are respectively connected to pins 4 and 3 of the chip U12, pin 34 is connected to pin 2 of the socket P2, pin 37 is connected to pin 3 of the socket P2, pin 44 is connected to one end of the resistor R4, pins 9, 24, 36, and 48 are all connected to a 3.3V power supply, and pins 8, 23, 35, and 47 are all grounded; the other end of the resistor R2 is connected to a 3.3V power supply; the negative electrode of the capacitor C1 is connected to the other end of the key switch RES. ground; Pin 1 of the chip U12 is connected to a 3.3V power supply, and Pin 2 is grounded; Pin 1 of the socket P2 is connected to one end of the capacitor C10 and then grounded, and Pin 4 is connected to the other end of the capacitor C10 and then grounded; The other end of the resistor R4 is connected to Pin 3 of the socket P1; Pins 1-2 of the socket P1 are all connected to a 3.3V power supply, Pin 4 is connected to one end of the resistor R3, and Pins 5-6 are all grounded; The other end of the resistor R3 is connected to BOOT1; The clock unit includes a crystal oscillator X1, Y1, a resistor R1, a capacitor C2-C5; connector 1 of the crystal oscillator X1 is connected to one end of the capacitor C5, one end of the resistor R1 and OSC_OUT, connector 2 is connected to one end of the capacitor C4, the other end of the resistor R1 and OSC_IN; connector 1 of the crystal oscillator Y1 is connected to one end of the capacitor C3 and PC15, connector 2 is connected to one end of the capacitor C2 and PC14; the other ends of the capacitors C2-C5 are all grounded; the filtering unit includes capacitors C11-C14, one end of the capacitors C11-C14 are all connected to the 3V3 power supply, and the other ends are all grounded.

3. The intelligent truck security system according to claim 1, characterized in that: The temperature monitoring unit includes a chip U10 and a resistor R5, wherein a pin 1 of the chip U10 is grounded, a pin 2 is connected to one end of the resistor R5 and PB1, and a pin 3 is connected to the other end of the resistor R5 and a VCC power supply.

4. The intelligent truck security system according to claim 1, characterized in that: The camera monitoring unit includes chips U7-U9, and the CSI end of the chip U7 is connected to the CSI end of the chip U8; pin 12 of the chip U8 is connected to the 3.3V power supply, pin 13 is grounded, pins 15-16 are respectively connected to pins 6-5 of the chip U9, pin 17 is connected to pin 13 of the chip U9 and then grounded, and pin 18 is connected to pin 12 of the chip U9 and then connected to the 3.3V power supply; pins 7-8 of the chip U9 are respectively connected to PA3 and PA2.

5. The intelligent truck security system according to claim 1, characterized in that: The ultrasonic sensor unit includes a chip U4, wherein a pin 1 of the chip U4 is connected to a VCC power supply, pins 2-3 are connected to PB4 and PB3, and a pin 5 is grounded.

6. The intelligent truck security system according to claim 1, characterized in that: The liquid level sensing unit includes a chip U5, wherein a pin 1 of the chip U5 is connected to a 3.3V power supply, a pin 2 is connected to PB5, and a pin 3 is grounded.

7. The intelligent truck security system according to claim 1, characterized in that: The vibration sensor unit includes a chip U6, a pin 1 of the chip U6 is connected to PB0, a pin 2 is grounded, and a pin 3 is connected to a 3.3V power supply.

8. The intelligent truck security system according to claim 1, characterized in that: The acceleration sensor unit includes a chip U13, wherein a pin 1 of the chip U13 is connected to a 3.3V power supply, a pin 2 is grounded, and pins 3-4 are connected to PB10-PB11 respectively.

9. The intelligent truck security system according to claim 1, characterized in that: The buzzer alarm unit includes a speaker LS1, a transistor Q1 and a resistor R8, wherein the emitter of the transistor Q1 is connected to a 3.3V power supply, the base is connected to one end of the resistor R8, and the collector is connected to one end of the speaker LS1; the other end of the resistor R8 is connected to PA15; and the other end of the speaker LS1 is grounded.

10. The intelligent truck security system according to claim 1, characterized in that: The power module includes chips U2-U3, capacitors C6-C9 and diode TVS; pin 1 of the chip U2 is connected to the positive electrode of the diode TVS, one end of the capacitor C6-C7, and pin 2 of the chip U3 and then grounded, pin 5 is connected to the negative electrode of the diode TVS, the other end of the capacitor C6, pins 1 and 3 of the chip U3 and then connected to the VCC power supply; pin 4 of the chip U3 is connected to the other end of the capacitor C7, pin 5 is connected to one end of the capacitor C8-C9 and the 3.3V power supply; the other end of the capacitor C8-C9 is grounded.

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