Theftproof waterlogging monitor

Abstract

This utility model discloses an anti-theft flood monitoring device, which includes a water level sensor, a 4G wireless communication circuit, an LED light guide window, a GNSS positioning circuit, connecting cables, a battery compartment, a PCBA board, a 4G SIM card, a Bluetooth circuit, an MCU core circuit, a tilt sensor, a power supply cable hole, and circuit board mounting posts. The 4G wireless communication circuit, GNSS positioning circuit, 4G SIM card, Bluetooth circuit, MCU core circuit, and tilt sensor are all built into the PCBA board. The tilt sensor is used to collect the installation tilt angle of the anti-theft flood monitoring device and monitor its vibration status in real time. The GNSS positioning circuit is used to obtain the current position information of the flood monitoring device. The two are used together to determine whether the attitude and position of the anti-theft flood monitoring device have changed. This anti-theft flood monitoring device can provide early warning and location tracking in case of accidental detachment during use, facilitating quick replacement and retrieval.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of water level monitoring technology, and more specifically, relate to an anti-theft flood monitoring instrument. Background Technology

[0002] Urban flooding has become increasingly serious in recent years. When short-term heavy rainfall or continuous rainfall exceeds the capacity of the city's drainage system, it can lead to water accumulation on the ground, traffic disruptions, and even the flooding of buildings. Against this backdrop, road water accumulation monitoring can reduce the impact of flooding on citizens' lives and the operation of the city by monitoring urban road water accumulation in real time and issuing timely warnings.

[0003] In traditional urban flood monitoring, contact-type flood level monitors are usually installed in conspicuous locations near the roadside. These locations are often areas with frequent pedestrian and vehicle traffic. In the current sites where anti-theft flood monitoring devices are used, the loss of equipment is very serious. This includes cases where the monitors are lost due to accidents or other construction work, as well as cases of deliberate vandalism and theft. Summary of the Invention

[0004] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a theft and flood monitoring device. Using a tilt sensor built into the PCBA board, the device's installation tilt angle and vibration status can be collected in real time to determine whether the device's attitude and position have changed. A GNSS positioning circuit built into the PCBA board can acquire the device's current location information. When the device changes attitude or moves, real-time positioning is triggered, and the location information is transmitted to the maintenance platform via a 4G wireless communication circuit.

[0005] To achieve the above objectives, this utility model provides an anti-theft and flood monitoring device, comprising:

[0006] A water level sensor installed on one side of the bottom of the anti-theft and flood monitoring device, a PCBA board installed on one side of the top of the anti-theft and flood monitoring device, a 4G wireless communication circuit built into the PCBA board, a 4G SIM card installed on the PCBA board, a Bluetooth circuit installed on the PCBA board, and an MCU core circuit built into the PCBA board.

[0007] The GNSS positioning circuit built into the PCBA board communicates with the MCU core circuit through the IIC communication interface and the SPI communication interface.

[0008] The tilt sensor built into the PCBA board communicates with the MCU core circuit via UART serial communication.

[0009] Furthermore, the anti-theft and flood monitoring device also includes an LED light guide window on the outside of the device.

[0010] Furthermore, the anti-theft and flood monitoring device also includes a battery compartment inside the other side of the anti-theft and flood monitoring device.

[0011] Furthermore, the anti-theft and flood monitoring device also includes a power cable hole between the battery compartment and the PCBA board.

[0012] Furthermore, the anti-theft and flood monitoring device also includes a connecting wire placed in the power supply cable hole.

[0013] Furthermore, the anti-theft and flood monitoring device also includes circuit board fixing posts for mounting the PCBA board.

[0014] Furthermore, the tilt sensor is equipped with an ADXL345 accelerometer, which uses an INT1 status output pin.

[0015] Furthermore, the GNSS positioning circuit is internally equipped with an L76K positioning module, which uses WAKE_UP and RESET_N pins;

[0016] Furthermore, the ADXL345 accelerometer supports a power supply range of 2.0-3.6V, while the tilt sensor uses a 3.3V power supply.

[0017] Furthermore, the L76K positioning module supports a power supply range of 2.7-3.4V, while the GNSS positioning circuit uses a 3.3V power supply.

[0018] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0019] 1. The waterlogging monitoring device of this utility model can collect the installation tilt angle of the anti-theft waterlogging monitoring device and monitor the vibration status of the anti-theft waterlogging monitoring device in real time through the tilt sensor built into the PCBA board, so as to determine whether the attitude and position of the anti-theft waterlogging monitoring device has changed. Through the GNSS positioning circuit built into the PCBA board, the current position information of the anti-theft waterlogging monitoring device can be obtained. When the anti-theft waterlogging monitoring device changes attitude or moves, it will trigger real-time positioning and send the position information to the operation and maintenance platform through the 4G wireless communication circuit.

[0020] 2. In the tilt sensor circuit of this utility model, after the ADXL345 accelerometer is initialized, the INT1 signal remains high before data acquisition is completed or before a vibration event occurs. When signal acquisition is completed or a vibration event occurs, the signal will become low. The MCU core circuit determines whether to communicate with ADXL by detecting the state of this pin. When the pin is detected to be low, it will first read the state memory of ADXL345 to identify the event that triggered the pin to enter the ready state, and then perform corresponding operations accordingly. The MCU core circuit can modify the working mode of ADXL345 accelerometer through the communication methods of IIC interface or SPI interface, and can switch different low-power modes according to the working state of the product to reduce the overall power consumption of the circuit.

[0021] 3. In the GNSS positioning circuit of this utility model, after the L76K positioning module is powered on, the MCU core circuit controls the WAKE_UP and RESET_N pin levels to put the L76K positioning module into the initial state. The MCU core circuit can configure the working mode and data output content of the L76K positioning module through the UART interface as needed. For example, it can select the NMEA output message type, select the GPS or BeiDou positioning satellite type, and set the output frequency of positioning data. When the L76K positioning module enters the working mode, it will periodically output NMEA format positioning information messages from the UART interface. These messages contain information such as location information, positioning status, satellite signal quality, and satellite clock. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the front side of the anti-theft and flood monitoring device according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure on the other side of the front of the anti-theft and flood monitoring device according to an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the reverse side structure of the anti-theft and flood monitoring device according to an embodiment of this utility model;

[0025] Figure 4 This is a circuit diagram of the anti-theft and waterlogging detector according to an embodiment of the present invention.

[0026] Figure 5 This is a circuit diagram of the tilt sensor of the anti-theft and flood monitoring instrument according to an embodiment of this utility model;

[0027] Figure 6 This is a GNSS positioning circuit diagram of an anti-theft and flood monitoring instrument according to an embodiment of this utility model;

[0028] Figure 7This is a flowchart illustrating the anti-theft operation of the anti-theft flood monitoring device according to an embodiment of this utility model.

[0029] Figure 8 This is a flowchart illustrating the normal operation of the anti-theft and flood monitoring device according to an embodiment of this utility model.

[0030] In all the accompanying drawings, the same reference numerals indicate the same technical features, specifically: 1-water level sensor, 2-4G wireless communication circuit, 3-LED light guide window, 4-GNSS positioning circuit, 5-connecting line, 6-battery compartment, 7-PCBA board, 8-4G SIM card, 9-Bluetooth circuit, 10-MCU core circuit, 11-tilt sensor, 12-power supply cable hole, 13-circuit board fixing post. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] This embodiment provides a theft prevention and flood monitoring device, such as... Figure 1 , Figure 2 , Figure 3 As shown, it includes a water level sensor 1, a 4G wireless communication circuit 2, an LED light guide window 3, a GNSS positioning circuit 4, connecting wires 5, a battery compartment 6, a PCBA board 7, and a 4G... The device includes a SIM card 8, a Bluetooth circuit 9, an MCU core circuit 10, a tilt sensor 11, a power supply cable hole 12, and circuit board mounting posts 13. The water level sensor 1 is installed on one side of the bottom of the anti-theft and flood monitoring device, and the PCBA board 7 is installed on one side of the top. Multiple circuit board mounting posts 13 (three in this embodiment) are located inside the anti-theft and flood monitoring device. The PCBA board 7 is mounted on the circuit board mounting posts 13. A battery compartment 6 is installed inside the other side of the anti-theft and flood monitoring device. A power supply cable hole 12 is provided between the battery compartment 6 and the PCBA board 7. A connecting cable 5 connects the battery and the PCBA board 7, passing through the power supply cable hole 12. An LED light guide window 3 is located outside the anti-theft and flood monitoring device. The PCBA board 7 houses a 4G wireless communication circuit 2, a GNSS positioning circuit 4, a Bluetooth circuit 9, an MCU core circuit 10, and a tilt sensor 11. The 4G SIM card 8 is located near the connecting cable 5.

[0033] like Figure 4As shown, the following functions are embedded in the PCBA board 7 of this anti-theft and flood monitoring instrument: (1) The MCU core circuit is the main processing circuit of the entire monitoring instrument product, which is used to coordinate and manage the work of all other component circuits; (2) The power supply conditioning circuit is used to condition the input power supply voltage into a stable power supply voltage used by the entire circuit system; (3) The magnetic induction circuit can be used to manually activate the local Bluetooth communication function of the product; (4) The Bluetooth communication circuit can connect the product with a mobile phone via Bluetooth. After successful connection, the product can be managed through a mobile phone applet or APP, including parameter query and setting, viewing of running status information, manual triggering of data acquisition, triggering of remote communication and other functions. It is an important function for product installation and maintenance; (5) The 4G wireless communication circuit is used for communication between the monitoring instrument and the remote server. The monitoring instrument reports the collected water level and other information to the remote server through this method. When the product is lost, the product location information can be sent intermittently or in real time. (6) Data storage circuit is used to store and maintain water level, tilt angle and vibration information, power supply and other operating status information, and also to store product working parameters; (7) Indicator circuit is used to indicate the operating status of the product. Different flashing states can indicate the current working state of the detector; (8) Water level sensor includes pressure sensor and electronic water gauge, or one of them can be used alone to measure the water level of flooding; (9) Tilt angle sensor is used to collect the installation tilt angle of the equipment and monitor the vibration status of the equipment in real time. The measured tilt angle is used for the correction calculation of the electronic water gauge to measure the water level and can also be used to determine whether the equipment has changed its attitude. Vibration information can be used to determine whether the product is moving; (10) GNSS positioning circuit can obtain the current position information of the product. When the product changes its attitude or moves, it will trigger real-time positioning and send the position information to the operation and maintenance platform through 4G wireless communication circuit.

[0034] According to the embodiments of this utility model, the GNSS positioning circuit 4 and the tilt sensor 11 work together to integrate the GNSS positioning circuit 4 and the tilt sensor 11 directly on the PCBA board 7 without the need for other external devices. On the one hand, this simplifies the structural design of the monitor and avoids the monitor structure being too large, which is not conducive to installation and use. On the other hand, integrating multiple functional circuits on the PCBA board 7 improves the convenience of using the monitor.

[0035] like Figure 5As shown, the tilt sensor circuit of the anti-theft and flood monitoring instrument includes resistors R64, R65, R66, R67, and R68, capacitor C68, MISO_ADXL leads, SCL clock signal line, SDA data signal line, and an ADXL345 accelerometer sensor. The ADXL345 accelerometer sensor supports a power supply range of 2.0-3.6V, and the circuit uses 3.3V to power it. The ADXL345 sensor communicates with the MCU core circuit via an IIC communication interface. The circuit design also retains a redundant design for SPI communication, allowing the MCU core circuit to communicate with the ADXL345 accelerometer sensor via the SPI interface.

[0036] When the ADXL345 accelerometer uses IIC communication, the SDA and SCL leads are connected to the SDA and SCL pins of the MCU and ADXL345, respectively. R64, R65, R66, and R67 are all 10K pull-up resistors to ensure that the signal lines are at a high level when idle. Resistor R68 is used to set the IIC address or select the device.

[0037] When the ADXL345 accelerometer uses SPI communication, the MISO, MOSI, SCLK, and nCS leads are connected to the MISO, MOSI, SCLK, and nCS pins of the MCU, respectively. The SCL pin is used as the SCLK of the SPI interface, the SDA pin is used as the SDI (MOSI signal) of the SPI interface, the MISO_ADXL lead is used as the SDO (MISO signal) of the SPI, and the nCS pin is used as the chip select signal for SPI communication. The circuit uses a C68 capacitor as a power supply decoupling capacitor for the ADXL345 accelerometer, which can stabilize the power supply voltage and suppress noise interference, ensuring reliable circuit operation.

[0038] After the ADXL345 is initialized, the INT1 signal remains high until data acquisition is complete or a vibration event occurs. It then goes low when data acquisition is complete or a vibration event occurs. The MCU detects the state of this pin to determine if communication is needed. When a low level is detected, it first reads the ADXL345's state memory, identifies the event type, and then performs the appropriate operation. The MCU core circuit can modify the ADXL345 accelerometer's operating mode via IIC or SPI interfaces, switching between different low-power modes according to the product's operating status to reduce the overall power consumption of the circuit.

[0039] like Figure 6As shown, the GNSS positioning circuit of the anti-theft and flood monitoring instrument includes an L76K positioning module, resistors R61, R63, R79, and R81, and capacitor C66. The L76K positioning module supports a power supply range of 2.7-3.4V, but the circuit uses 3.3V to power it. The communication interface between the L76K positioning module and the MCU core circuit uses UART serial communication. The communication interface is designed with 22R test and protection resistors such as R63 and R79. These resistors mainly facilitate communication testing and also have a certain signal reflection suppression function. The L76K positioning module and the MCU core circuit also have two control signals: WAKE_UP and RESET_N. These signal lines are also designed with 22R test and protection resistors such as R81. The WAKE_UP signal is used for the L76K positioning module's status wake-up control, controlling whether the L76K enters or exits Standby mode. RESET_N is used for hardware reset of the L76K positioning module. The GNSS positioning circuit uses an onboard positioning antenna to receive satellite signals. In this GNSS positioning circuit, after the L76K positioning module is powered on, the MCU core circuit controls the WAKE_UP and RESET_N pin levels to put the L76K positioning module into its initial state. The MCU core circuit can configure the L76K positioning module's operating mode and data output content via the UART interface as needed. For example, it can select the NMEA output message type, select the GPS or BeiDou positioning satellite type, and set the positioning data output frequency. Once the L76K positioning module enters operating mode, it will periodically output NMEA format positioning information messages from the UART interface. These messages contain location information, positioning status, satellite signal quality, and satellite clock information.

[0040] When the L76K positioning module uses UART communication, the GNSS_UART_TX and GNSS_UART_RX leads are connected to the UART_TX and UART_RX pins of the MCU and L76K positioning module, respectively, enabling data transmission and reception between the MCU and the GNSS positioning circuit. This allows the GNSS positioning circuit to obtain the product's current location information. When the product undergoes an attitude change or movement, the MCU detects the attitude change or movement event, triggering the GNSS positioning circuit to perform real-time positioning and transmitting the location information to the maintenance platform via the 4G wireless communication circuit.

[0041] like Figure 7As shown, the anti-theft process of the monitoring device is mainly based on changes in the installation angle and equipment vibration as judgment conditions, and ultimately uses the tilt angle of the monitoring device as the judgment condition. A vibration event can wake up the monitoring device to immediately perform an angle monitoring. Normally, the angle monitoring is collected at regular intervals. When the angle is consistent with the abnormal posture and operating state of the equipment, it will immediately perform a GNSS positioning and send the positioning information to a remote server. When the monitoring device is in an indoor environment where positioning is not possible, it will attempt to send information such as the tilt angle to the server to notify the server that the equipment may be lost.

[0042] like Figure 8 As shown, in another embodiment of the present invention, a theft prevention and flood monitoring device is provided, comprising the following steps:

[0043] Select the locations to be monitored based on the local urban flooding situation. It is recommended that the selected locations be the lowest points in the area.

[0044] Side-mounted installation is adopted. At the selected location, holes are drilled in the wall or curb according to the screw hole position of the equipment. M8 stainless steel expansion screws are used for fixing. During installation, the lowest point of the equipment should be about 1 cm away from the ground to facilitate water accumulation and entry into the pressure level gauge cavity.

[0045] Once the equipment is securely installed, measure and record the distance between the ground and the bottom of the equipment, accurate to the millimeter.

[0046] Connect the battery to the anti-theft and flood monitoring device. The device will then power on and complete the initialization of the entire MCU operating environment, including the clock and peripherals.

[0047] If the anti-theft and flood monitoring device has not been set up before its first power-on, it will automatically run using the default parameters. The working parameters and variables during operation are stored in the memory chip in the storage circuit. Each time it runs, it first obtains the working parameters and working status information from the memory chip.

[0048] Once the monitoring instrument is in operation, the RTC will be set to interrupt mode. The RTC will periodically check whether the current time meets the time point for timed data acquisition and timed data reporting. If the time condition is met, data acquisition or data reporting will begin.

[0049] When the monitor has no tasks to process, it automatically enters sleep mode to reduce power consumption and waits for the next event to wake it up.

[0050] Regularly perform equipment maintenance, pay attention to any abnormalities in equipment data, conduct regular inspections to ensure that the equipment is not damaged and is securely installed, and regularly calibrate the equipment to ensure accuracy.

[0051] In summary, this anti-theft and flood monitoring device can provide early warning and location information when the device is accidentally detached during use, facilitating quick replacement and retrieval.

[0052] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A theft prevention and flood monitoring device, characterized in that, include: A water level sensor (1) installed on one side of the bottom of the housing, a PCBA board (7) installed on one side of the top, a 4G wireless communication circuit (2) built into the PCBA board (7), a 4G SIM card (8) installed on the PCBA board (7), a Bluetooth circuit (9) installed on the PCBA board (7), and an MCU core circuit (10) built into the PCBA board (7). The GNSS positioning circuit (4) built into the PCBA board (7) communicates with the MCU core circuit (10) using the IIC communication interface and the SPI communication interface. And a tilt sensor (11) built into the PCBA board (7), the tilt sensor (11) communicates with the MCU core circuit (10) via UART serial communication.

2. The anti-theft and flood monitoring device according to claim 1, characterized in that, It also includes an LED light guide window (3) opened on the outside of the housing.

3. The anti-theft and flood monitoring device according to claim 1, characterized in that, It also includes a battery compartment (6) located inside the other side of the housing.

4. The anti-theft and flood monitoring device according to claim 3, characterized in that, It also includes a power cable hole (12) between the battery compartment (6) and the PCBA board (7).

5. The anti-theft and flood monitoring device according to claim 4, characterized in that, It also includes a connecting wire (5) disposed in the power supply cable hole (12).

6. A theft prevention and flood monitoring device according to any one of claims 1-5, characterized in that, It also includes circuit board mounting posts (13) for mounting the PCBA board (7).

7. A theft prevention and flood monitoring device according to any one of claims 1-5, characterized in that, The tilt sensor (11) is equipped with an ADXL345 accelerometer, which uses the INT1 state output pin.

8. The anti-theft and flood monitoring device according to claim 7, characterized in that, The ADXL345 accelerometer supports a power supply range of 2.0-3.6V, and the tilt sensor (11) is powered by 2.0-3.6V.

9. A theft prevention and flood monitoring device according to any one of claims 1-5, characterized in that, The GNSS positioning circuit (4) is equipped with an L76K positioning module, which uses WAKE_UP and RESET_N pins.

10. A theft prevention and flood monitoring device according to claim 9, characterized in that, The L76K positioning module supports a power supply range of 2.7-3.4V, and the GNSS positioning circuit (4) is powered by 2.7-3.4V.

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