CN210664560U

CN210664560U - Humidity sensing intelligent terminal with GPS positioning function

Info

Publication number: CN210664560U
Application number: CN201922154435.2U
Authority: CN
Inventors: 吴书娥; 刘东平; 李君�
Original assignee: Tianjin Yaotong Technology Co ltd
Current assignee: Tianjin Yaotong Technology Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-06-02
Anticipated expiration: 2029-12-05

Abstract

The utility model relates to a humidity sensing intelligent terminal with GPS positioning, one part of 3.6V power supply of a high-capacity lithium battery supplies power for a communication module, the other part of the 3.6V power supply is converted into 3.0V power supply for other devices on a board through an LDO power supply conversion chip, and the terminal completes the monitoring of an IO state, an external humidity sensor and an internal environment humidity sensor and the communication of a wireless communication module through an embedded MCU stm32l1 series single chip microcomputer; the BC20 module integrates the functions of NB-IoT communication and GPS positioning at the same time; the embedded MCU realizes the conversion between the embedded MCU and the BC20 module signal through a USART signal level conversion circuit between the NB-IOT communication module and the embedded MCU, the converted signal is uploaded to the NB-IOT base station by adopting the NB-IOT communication module to alarm and give out position information, and the NB-IOT base station generates a work order.

Description

Humidity sensing intelligent terminal with GPS positioning function

Technical Field

The utility model belongs to the information control field relates to the intelligent control who adopts the information means to humidity sensing, especially a take humidity sensing intelligent terminal of GPS location.

Background

Currently, most active humidity data acquisition adopts a wired acquisition system, and the communication mode uses the traditional GSM system for communication. Because the energy consumption of the equipment is large, the equipment can be continuously supplied with power only by needing a wired power supply, so that the construction difficulty (such as a field environment in which the wired power supply cannot be provided) is increased for installing the humidity acquisition equipment on the field; also, if the power is cut off due to an accident, it may cause a failure of the collecting apparatus. Meanwhile, the traditional humidity acquisition equipment does not have the GPS positioning function and cannot acquire the geographical position information acquired by humidity.

Through the search of published patent documents, the following two patents related to the present patent application are found:

1. a GPS vehicle-mounted terminal system (cn202049235U) with temperature and humidity sensing function comprises a GPS vehicle-mounted terminal, a temperature sensor electrically connected with the GPS vehicle-mounted terminal, a humidity sensor electrically connected with the GPS vehicle-mounted terminal, an antenna electrically connected with the GPS vehicle-mounted terminal, and a central processing server in data connection with the antenna through a wireless network technology. Compared with the prior art, the utility model, have the temperature and the humidity condition that can respond to the surrounding environment to report to the police the characteristics of reminding according to temperature and humidity condition.

2. An intelligent early warning method, a storage medium and an intelligent terminal (cn109764915A) according to the temperature and the humidity of a production environment, wherein the method comprises the following steps: the method comprises the steps of calling a data acquisition device to acquire temperature and humidity data of a production environment area to be monitored, and uploading the acquired temperature and humidity data to a cloud platform through a WIFI wireless network; performing statistical analysis on temperature and humidity data through the cloud platform to obtain a temperature and humidity data report of the production environment area to be monitored, and comparing the temperature and humidity data with a preset humidity early warning value in real time; and visually displaying the temperature and humidity data report, and sending out early warning information when the temperature and humidity data are higher than the temperature and humidity early warning value.

In the first and second publications, though the purpose is similar, the technical features are different from the present patent application.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a humidity sensing intelligent terminal with GPS positioning, which is powered by a high-energy lithium battery without adopting a wired mode and has ultralow power consumption and no maintenance; and, humidity transducer intelligent terminal loads GPS orientation module, can retrieve according to GPS locating information when it takes place to lose.

The purpose of the utility model is realized like this:

the utility model provides a take humidity sensing intelligent terminal of GPS location, includes high capacity lithium cell, power conversion, embedded MCU, BC20 module, analog signal preprocessing circuit, ambient humidity sensor, is supplied power by high capacity high energy lithium cell, its characterized in that: one part of 3.6V power supply of the high-capacity lithium battery supplies power to the communication module, the other part of the power supply is converted into 3.0V power to supply power to other devices on the board through the LDO power conversion chip, and the terminal completes IO state, monitoring of an external humidity sensor and an internal environment humidity sensor and communication of the wireless communication module through an embedded MCU stm32l1 series single chip microcomputer; the BC20 module integrates the functions of NB-IoT communication and GPS positioning at the same time; the embedded MCU realizes the conversion between the embedded MCU and the BC20 module signal through a USART signal level conversion circuit between the NB-IOT communication module and the embedded MCU, the converted signal is uploaded to an NB-IOT base station by adopting the NB-IOT communication module to alarm and give out position information, and the NB-IOT base station generates a work order; the embedded MCU is connected with the environment humidity sensor by an I2C bus, and the embedded MCU is connected with the analog signal preprocessing circuit and then connected with the pipeline humidity sensor.

In the circuit of the environmental humidity sensor, the chip U6 of the humidity sensor SHT20 used has current consumption below the uA level in the sleep mode; the embedded MCU reads the ambient humidity in real time through the I2C bus, and R6 and R7 are pull-up resistors of the I2C bus to provide driving current of the bus.

The analog signal preprocessing circuit comprises an interface P6, a signal relay K6, a de-jitter circuit and a low-power consumption single-path operational amplifier U7, wherein the interface P6 is a 4-20 mA interface for expansion and is used for connecting an external humidity sensor, and the external humidity sensor is arranged on a gas pipeline to be tested and is input into a terminal through an analog signal of 4-20 mA; a resistor R13 connected on the line is a tested current load so as to convert an analog current signal of 4-20 ma into a voltage signal; the signal relay K6 controls the power supply input of the preprocessing circuit and the input of the analog voltage signal, and controls the power consumption of the analog signal preprocessing circuit through the CUR _ EN signal; a diode D7 and a de-jitter circuit are arranged on a circuit at the rear end of the signal relay, a diode D7 is a voltage protection diode of the analog circuit, the de-jitter circuit is composed of R12 and C10, the analog voltage signal is kept by a low-power consumption single-circuit operational amplifier U7 and is input to the embedded MCU for ADC sampling, and a resistor R15 arranged on a circuit at the front end of U7 provides stable initial input voltage for the input of the analog signal preprocessing circuit.

The utility model has the advantages that:

1. the utility model is powered by a high-capacity high-energy lithium battery, the NB-IoT communication ultra-low power consumption can realize maintenance-free, the humidity measuring part monitors the environmental humidity, and the humidity measuring part comprises an external pipeline humidity sensor such as the embodiment and an internal pipeline humidity sensor such as the environmental humidity sensor; when the humidity reaches a preset value or the humidity fluctuates abnormally, an alarm mechanism is triggered to activate a GPS positioning part, an NB-IoT communication part reports information to a system control platform, the system control platform gives an alarm, the system produces a work order, and the work order information is pushed to a mobile phone of an appointed operation and maintenance person to carry out on-site operation and maintenance.

2. The utility model can be connected with a common industrial humidity sensor through a 4-20 mA analog interface, and is installed near a measured pipeline; meanwhile, the humidity value of the surrounding environment, the humidity value of gas in the pipeline and the positioning information of the GPS can be collected at regular time and reported to the platform for processing, and the platform can obtain the humidity distribution of the pipeline more intuitively.

3. The utility model adopts no wired mode, is powered by the high-energy lithium battery, and has ultralow power consumption and no maintenance; the intelligent terminal of the humidity sensor loads the GPS positioning module, and when the intelligent terminal is lost, the GPS positioning module can be recovered according to the GPS positioning information.

Drawings

Fig. 1 is a block diagram of a control circuit of the present invention;

FIG. 2 is a schematic circuit diagram of the ambient humidity sensor of the present invention;

fig. 3 is a schematic circuit diagram of the analog signal preprocessing circuit of the present invention.

Detailed Description

The invention will be further illustrated with reference to the following examples: the following examples are illustrative and not intended to be limiting, and the scope of the present invention is not limited by the following examples.

The utility model provides a take humidity sensing intelligent terminal of GPS location, its block diagram refers to figure 1, including high capacity lithium cell, power conversion, embedded MCU, BC20 module, analog signal preprocessing circuit, ambient humidity sensor, this terminal is supplied power by high capacity high energy lithium cell, and the 3.6V power supply of lithium cell partly gives communication module power supply, and another part converts 3.0V through LDO power conversion chip and gives other devices power supplies on the board. The IO state, the monitoring of an external humidity sensor and an internal environment humidity sensor and the communication of the wireless communication module are completed on the board through an embedded MCU stm32l1 series single chip microcomputer, the wireless communication module on the board adopts a scheme of a Quectrel manufacturer BC20 module, and the BC20 module integrates the functions of NB-IoT communication and GPS positioning. The embedded MCU realizes the conversion between the embedded MCU and the BC20 module signal through a USART signal level conversion circuit between the NB-IOT communication module and the embedded MCU, the converted signal is uploaded to an NB-IOT base station by adopting the NB-IOT communication module to alarm and give out position information, and the NB-IOT base station generates a work order; the embedded MCU is connected with an environmental humidity sensor (the model of the embodiment is SHT20) by an I2C bus, and the embedded MCU is connected with an analog signal preprocessing circuit and further connected with the pipeline humidity sensor.

FIG. 2 is a schematic circuit diagram of an ambient humidity sensor, wherein a humidity sensor SHT20 chip U6 is adopted, which has a current consumption below the uA level in a sleep mode and is suitable for measuring ambient humidity; the embedded MCU can read the ambient humidity in real time through an I2C bus, and R6 and R7 are pull-up resistors of the I2C bus and provide driving current of the bus.

FIG. 3 is a schematic circuit diagram of an analog signal preprocessing circuit, which includes an interface P6, a signal relay K6, a de-jitter circuit and a low power consumption single-path operational amplifier U7, wherein the interface P6 is a 4-20 mA interface for expansion and is used for connecting an external humidity sensor, the external humidity sensor is generally installed on a gas pipeline to be tested and is input into a terminal through an analog signal of 4-20 mA; the resistor R13 connected on the line is a tested current load, and can convert an analog current signal of 4-20 ma into a voltage signal; the signal relay K6 controls the power input of the preprocessing circuit and the input of the analog voltage signal, and the power consumption of the analog signal preprocessing circuit can be flexibly controlled through the CUR _ EN signal; a diode D7 and a de-jitter circuit are arranged on a circuit at the rear end of the signal relay, a diode D7 is a voltage protection diode of the analog circuit, the de-jitter circuit is composed of R12 and C10, the analog voltage signal is kept by a low-power consumption single-circuit operational amplifier U7 and is input to the embedded MCU for ADC sampling, and a resistor R15 arranged on a circuit at the front end of U7 provides a stable initial input voltage for the input of the analog signal preprocessing circuit.

Circuit portions not described in detail in this embodiment, including some peripheral circuits, may be considered as prior art; although not described in detail, or otherwise clear, it does not affect the technical integrity of the present patent application.

The utility model discloses a working method is:

the humidity sensing intelligent terminal is installed near the pipeline gas of which the humidity needs to be monitored, the terminal collects the humidity of the pipeline gas to be monitored, the humidity of the external environment and GPS positioning information at regular time and reports the information to the platform through NB-IoT. When the humidity value of the measured pipeline gas exceeds the specified threshold range, an alarm is triggered, the alarm information is sent to the system control platform to generate a work order, and the work order is pushed to operation and maintenance personnel by the platform.

Claims

1. The utility model provides a take humidity sensing intelligent terminal of GPS location, includes high capacity lithium cell, power conversion, embedded MCU, BC20 module, analog signal preprocessing circuit, ambient humidity sensor, is supplied power by high capacity high energy lithium cell, its characterized in that: one part of 3.6V power supply of the high-capacity lithium battery supplies power to the communication module, the other part of the power supply is converted into 3.0V power to supply power to other devices on the board through the LDO power conversion chip, and the terminal completes IO state, monitoring of an external humidity sensor and an internal environment humidity sensor and communication of the wireless communication module through an embedded MCU stm32l1 series single chip microcomputer; the BC20 module integrates the functions of NB-IoT communication and GPS positioning at the same time; the embedded MCU realizes the conversion between the embedded MCU and the BC20 module signal through a USART signal level conversion circuit between the NB-IOT communication module and the embedded MCU, the converted signal is uploaded to an NB-IOT base station by adopting the NB-IOT communication module to alarm and give out position information, and the NB-IOT base station generates a work order; the embedded MCU is connected with the environment humidity sensor by an I2C bus, and the embedded MCU is connected with the analog signal preprocessing circuit and then connected with the pipeline humidity sensor.

2. The humidity sensing intelligent terminal with GPS positioning according to claim 1, characterized in that: the environmental humidity sensor, a chip U6 of a humidity sensor SHT20 adopted in a circuit of the environmental humidity sensor has current consumption below the uA level in a sleep mode; the embedded MCU reads the ambient humidity in real time through an I2C bus, and R6 and R7 are pull-up resistors of the I2C bus to provide driving current of the bus.

3. The humidity sensing intelligent terminal with GPS positioning according to claim 1, characterized in that: the analog signal preprocessing circuit comprises an interface P6, a signal relay K6, a de-jitter circuit and a low-power consumption single-path operational amplifier U7, wherein the interface P6 is a 4-20 mA interface for expansion and is used for connecting an external humidity sensor, and the external humidity sensor is arranged on a gas pipeline to be detected and is input into a terminal through an analog signal of 4-20 mA; a resistor R13 connected on the line is a tested current load so as to convert an analog current signal of 4-20 ma into a voltage signal; the signal relay K6 controls the power supply input of the preprocessing circuit and the input of the analog voltage signal, and controls the power consumption of the analog signal preprocessing circuit through the CUR _ EN signal; a diode D7 and a de-jitter circuit are arranged on a circuit at the rear end of the signal relay, a diode D7 is a voltage protection diode of the analog circuit, the de-jitter circuit is composed of R12 and C10, the analog voltage signal is kept by a low-power consumption single-circuit operational amplifier U7 and is input to the embedded MCU for ADC sampling, and a resistor R15 arranged on a circuit at the front end of U7 provides stable initial input voltage for the input of the analog signal preprocessing circuit.