Sensor for detecting water immersion state and temperature and humidity

Abstract

The utility model discloses a sensor for water immersion state and temperature and humidity detection, which is characterized in that a mainboard, a direct current power supply and 485 communication board and a detection module are arranged in the sensor to respectively acquire the water immersion state and the temperature and humidity, data acquisition and processing are carried out on the detection module through an MCU (Microprogrammed Control Unit) circuit, and then the MCU circuit encrypts a result through an encryption and decryption circuit and sends the encrypted result to a server; compared with the prior art that when the intelligent station building is inspected, manual reading of environmental factors is not needed, water immersion information and temperature and humidity information can be obtained at a far end, the workload of manual inspection is reduced, the effect of real-time monitoring can be achieved in the unmanned inspection time, and the intelligent station building inspection efficiency is improved. And through the data encryption technology, the accuracy and safety of the data are greatly improved, and the selectivity of the user is increased through different power supply modes and communication modes.

Description

Technical Field

[0001] The utility model belongs to the field of environmental detection equipment, and in particular relates to a sensor for detecting water immersion status and temperature and humidity. Background Art

[0002] At present, sensors for water immersion status and temperature and humidity detection are the main intelligent auxiliary equipment used in smart distribution stations. They are used to monitor and report station data information in real time. The water immersion detection module in the sensor is used to detect whether there is water ingress in the environment, and the detection sensitivity can be adjusted through the dip switch; the temperature and humidity detection module in the sensor is used to detect the temperature and humidity of the environment.

[0003] Since water immersion and ambient temperature and humidity are directly related to whether the environment of the smart distribution station is suitable for equipment operation, environmental testing is extremely important.

[0004] In daily inspection work, environmental monitoring is usually carried out through visual inspection and manual meter reading. That is, during the inspection process, the water immersion status of the ground and cabinet is observed, and the on-site temperature and humidity are read and recorded through the thermometer and humidity meter. It is inconvenient and unsafe to observe the inside of the equipment. Not only does the work need to consider certain safety factors, but also requires considerable manual input. Therefore, there is an urgent need for a sensor for water immersion status and temperature and humidity detection that can increase work safety and save inspection manpower. Utility Model Content

[0005] In view of the above defects, the utility model provides a sensor for detecting water immersion status and temperature and humidity, including a housing base and a housing cover, a battery buckle, a mainboard and a 485 communication board are installed inside the housing base, the mainboard is fixed to the inner wall of the housing base, the battery buckle is welded on the mainboard, the 485 communication board is plugged into the slot of the mainboard, a built-in battery for powering the mainboard is installed inside the battery buckle, a detection module, a communication module, an encryption and decryption module and an MCU module are integrated at the mainboard, and an interface I and an interface II are provided at the bottom of the housing cover;

[0006] Interface I is used to install the power line of the external power supply and the communication line of the 485 communication board;

[0007] Interface II is used to install the detection line of the detection module and the antenna of wireless communication.

[0008] Furthermore, the detection module includes a temperature and humidity detection module and a water immersion detection module, and both the temperature and humidity detection module and the water immersion detection module are electrically connected to the mainboard.

[0009] Furthermore, the communication module includes a 485 communication module and a wireless communication module, and the model of the wireless communication module is TP1107.

[0010] Furthermore, a surge protector and an electrostatic protector are also installed on the mainboard.

[0011] Furthermore, the encryption and decryption module is an encryption chip, model HSC32I1-NBV60-IIC-204A.

[0012] Furthermore, a sealing strip is provided between the casing base and the casing cover.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] By setting a main board, DC power supply and 485 communication board in the sensor, the detection module collects water immersion status and temperature and humidity respectively, and collects and processes data of the detection module through the MCU circuit. After that, the MCU circuit encrypts the result through the encryption and decryption circuit, and sends it to the fusion terminal through the wired 485 communication board or the wireless communication module TP1107. Compared with the current inspection of the smart station house, there is no need to manually read the environmental factors. The water immersion information and temperature and humidity information can be obtained remotely, which reduces the workload of manual inspection and can achieve real-time monitoring during unmanned inspection time. Through data encryption technology, the accuracy and security of the data are also greatly improved. Different power supply methods and communication methods increase user options. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model.

[0016] Figure 2 It is a top view of the utility model.

[0017] Figure 3 It is a schematic diagram of the connection between various modules in the utility model.

[0018] In the figure: 1. Case base; 2. Case cover; 3. Battery clip; 4. 485 communication board; 5. Main board; 6. Sealing strip; 7. Interface I; 8. Interface II. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The drawings provide embodiments of the device. However, the device can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Example

[0022] like Figure 1-2 As shown, this embodiment provides a sensor for detecting water immersion status and temperature and humidity, including a housing base 1 and a housing cover 2 fixed by screws, and a sealing strip 6 is further provided at the connection between the housing base 1 and the housing cover 2 to increase the sealing performance of the two in the connection state, thereby achieving a waterproof and dustproof effect;

[0023] The inner wall of the housing base 1 is provided with a mainboard 5, and a battery clip 3 is welded on the mainboard 5 to facilitate the subsequent replacement of the lithium battery. A built-in 18650 lithium battery for internal power supply to the mainboard 5 is installed inside the battery clip 3. At the same time, the mainboard 5 can also be powered by direct current through a power cord, that is, it has two power supply modes:

[0024] The battery-powered mode has the characteristics of large capacity, light weight, good stability, and the battery-powered mode has anti-reverse connection measures. Specifically, the positive and negative poles are clearly marked on the printed circuit board. Secondly, the circuit is anti-reverse connected by adding a PMOS tube. When the positive and negative poles of the battery are connected correctly, the PMOS is turned on to allow current to pass. When the battery is reversely connected, the PMOS is not turned on.

[0025] The DC power supply adopts wide power supply technology, and the input voltage is adjustable from 9 to 24V. The DC power supply and battery power supply are isolated by a key switch. The DC power supply part adopts DC-DC followed by LDO to reduce ripple. The power interface of the motherboard 5 is equipped with electrostatic protection and surge protection measures. Specifically, the surge protector is used to limit the conduction of overvoltage and current, and bypass the excessive surge voltage of the device. The electrostatic protector is used to protect electronic equipment from damage by electrostatic discharge.

[0026] The mainboard 5 is integrated with a communication module, which includes a 485 communication board 4 for wired transmission and a wireless communication module of model TP1107. The 485 communication board 4 is installed in the expansion slot of the mainboard 5. The 485 communication board 4 transmits data through the communication line, and the TP1107 wireless communication module transmits data through the installed antenna. It should be noted that the wireless communication module is provided with an antenna seat to facilitate the subsequent selection of the corresponding antenna.

[0027] The main board 5 is integrated with a detection module, which includes a temperature and humidity detection module and a water immersion detection module electrically connected to the main board 5. The sensitivity of the water immersion detection module can be adjusted by a dip switch installed at the main board 5 to achieve the purpose of adjusting the sensitivity of the water immersion detection module. In detail, the water immersion detection module is composed of a water immersion sensor and a connecting line. Through the conductive principle of water, the two ends are connected after touching water, and the two ends are isolated after leaving water, thereby triggering the state change of the IO port of the MCU circuit. The temperature and humidity detection module is composed of a detection chip SHT30-DIS-B and its surrounding circuits and connections. Its operating temperature range is -40°C to +125°C, and the humidity range is from 0RH to 100%RH. It has a wide range of applications and high test accuracy.

[0028] The bottom of the shell cover 2 is provided with an interface I7 and an interface II8, both of which are cable waterproof connectors. The interface I7 is used to store the power line of the external power supply and the communication line used for wired communication of the 485 communication board 4, and the interface II8 is used to store the detection line connected to the detection module and the antenna connected to the wireless communication module.

[0029] The mainboard 5 also integrates an encryption and decryption module and an MCU module. Specifically, the encryption and decryption circuit authentication adopts the physical unclonable function PUF technology, and the encryption and decryption module adopts the encryption chip HSC32I1-NBV60-IIC-204A, which supports encryption algorithms such as SHA, AES, SM2, ECC, DES, and SM3. The MCU module adopts HC32L196KCTA-LQFP64. This series of single-chip microcomputers has a flexible power management system, which can control the device to enter a low-power state when powered by a battery to reduce battery loss and delay the use time of the device. When running at low power, the current is as low as 4.5uA. Specifically, by configuring a specific pin as a wake-up source in the program and setting the MCU to enter a low-power mode, low-power management controlled by the program can be achieved, which belongs to the conventional technology in this field and will not be described in detail here;

[0030] The MCU module is used to collect and process the information received from the detection module, and send the received communication data to the encryption and decryption module, process it after decryption, and send the data to the encryption and decryption module, and then send it to the corresponding communication module after encryption.

[0031] Working principle: Figure 3As shown, when in use, one of the two power supply modes is selected. The detected data is converted into digital signals by the temperature and humidity detection module and transmitted to the MCU module through the IIC interface. The water immersion detection module generates an IO port interrupt and the MCU module collects its status. Then the MCU module encrypts the data through the PUF and encryption and decryption modules. After that, the MCU module sends the encrypted data to the fusion terminal through the wired 485 or wireless communication module TP1107, which solves the reliance of the prior art on manual inspections when judging the on-site environment. There is no need for manual inspection records, and the effect of remotely obtaining environmental data is achieved.

[0032] It should be noted that the structure described in the utility model can be implemented in a variety of different forms and is not limited to the described embodiments. Any equivalent transformations made by ordinary technicians in this field using the contents of the utility model specification and drawings, or directly or indirectly applied to other related technical fields, such as the loading and unloading of other items, are included in the protection scope of the utility model.

Claims

1. A sensor for detecting water immersion status and temperature and humidity, comprising a housing base and a housing cover, wherein a battery clip, a main board and a 485 communication board are installed inside the housing base, characterized in that: The mainboard is fixed to the inner wall of the chassis base, the battery clip is welded to the mainboard, the 485 communication board is plugged into the slot of the mainboard, the battery clip is installed with a built-in battery for powering the mainboard, the mainboard is integrated with a detection module, a communication module, an encryption module and an MCU module, and the bottom of the shell cover is provided with interface I and interface II; Interface I is used to install the power line of the external power supply and the communication line of the 485 communication board; Interface II is used to install the detection line of the detection module and the antenna of the communication module.

2. A sensor for detecting water immersion status and temperature and humidity as claimed in claim 1, characterized in that: The detection module includes a temperature and humidity detection module and a water immersion detection module, and both the temperature and humidity detection module and the water immersion detection module are electrically connected to the mainboard.

3. A sensor for detecting water immersion status and temperature and humidity as claimed in claim 1, characterized in that: The communication module includes a 485 communication module and a wireless communication module, and the model of the wireless communication module is TP1107.

4. A sensor for detecting water immersion status and temperature and humidity as claimed in claim 1, characterized in that: A surge protector and an electrostatic protector are also installed on the mainboard.

5. A sensor for detecting water immersion status and temperature and humidity as claimed in claim 1, characterized in that: The encryption and decryption module is an encryption chip, model HSC32I1-NBV60-IIC-204A.

6. A sensor for detecting water immersion status and temperature and humidity as claimed in claim 1, characterized in that: A sealing strip is arranged between the casing base and the casing cover.

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