CN210664870U

CN210664870U - Pressure sensing intelligent terminal with GPS positioning function

Info

Publication number: CN210664870U
Application number: CN201922154539.3U
Authority: CN
Inventors: 刘东平; 王洪峰; 王震
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 pressure sensing intelligent terminal with GPS positioning, a high-capacity lithium battery provides a power supply, one part of the 3.6V power supply of the lithium battery supplies power to a communication module, and the other part of the 3.6V power supply is converted into 3.0V power through an LDO power conversion chip to supply power to other devices on a board; the embedded MCU completes IO state, monitoring of the external pressure sensor and communication of the wireless communication module; the BC20 module integrates NB-IOT communication and GPS positioning module functions at the same time, the embedded MCU is connected with the bridge signal acquisition circuit through a serial digital interface, the bridge signal acquisition circuit acquires pressure signals of the pressure sensor through bridge signals, and the embedded MCU is connected with the acceleration sensor through I2C. The terminal adopts a wireless mode, is powered by a high-energy lithium battery, and is ultralow in power consumption and free of maintenance; the pressure sensor intelligent terminal loads the GPS positioning module, and when the pressure sensor intelligent terminal is lost, the pressure sensor intelligent terminal can be recovered according to the GPS positioning information.

Description

Pressure 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 pressure, especially a take pressure sensing intelligent terminal of GPS location.

Background

At present, the collection node of the active pressure sensor is mainly installed by building a wired connection and a power supply, so that the installation cost and difficulty of the collection node can be increased, and the requirement on the professional technical level of an installer is met; moreover, most of the information is not connected with a network, so that the data statistics and calculation of the collected information are inconvenient; in addition, a GPS positioning function is not available, and the acquisition of the geographic information of the acquisition nodes is lacked.

Through the search of published patent documents, the following patent related to the present patent application is found:

a supports GPS wireless pipe network pressure measuring device (cn203298925U), it has micro power consumption processor responsible for collecting pressure, battery voltage, geographical position information, and encode through the procedure, then send to GPRS module to carry on the data transmission; the GPS module is mainly used for acquiring satellite signals, acquiring longitude, latitude, height and clock information of an equipment installation place, and then sending the information to the micro-power consumption processor; the GPRS communication module is mainly responsible for sending signals acquired by the processor to a data center server and receiving instructions of a data center in a network. The utility model discloses mainly be applied to the accurate measurement of pipe network pressure to two latitude information routing that pipe network pressure, battery voltage, signal strength, equipment fixing that will gather through GPRS module, GPS module give data center, and show through data center's software image, supply the staff to schedule the pipe network and provide the information reference.

Through the comparison of technical characteristics, the technical scheme of the above-mentioned patent publication is different from that of the present patent application, and the novelty and the creativity of the present patent application are not affected.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a pressure sensing intelligent terminal with GPS positioning, which adopts a wireless mode, is powered by a high-energy lithium battery and has ultralow power consumption and no maintenance; the pressure sensor intelligent terminal loads the GPS positioning module, and when the pressure sensor intelligent terminal is lost, the pressure sensor intelligent terminal can be recovered according to the GPS positioning information.

The purpose of the utility model is realized like this:

a pressure sensing intelligent terminal with GPS positioning comprises a high-capacity lithium battery, a power supply conversion module, an embedded MCU module, a BC20 module, a bridge signal acquisition circuit and an acceleration sensor, wherein the high-capacity lithium battery provides a power supply, one part of 3.6V power supply of the lithium battery supplies power to a communication module, and the other part of the 3.6V power supply of the lithium battery is converted into 3.0V power through an LDO power supply conversion chip to supply power to other devices on a board; the embedded MCU completes IO state, monitoring of the external pressure sensor and communication of the wireless communication module; the BC20 module integrates NB-IOT communication and GPS positioning module functions at the same time, the embedded MCU is connected with the bridge signal acquisition circuit through a serial digital interface, the bridge signal acquisition circuit acquires pressure signals of the pressure sensor through bridge signals, and the embedded MCU is also connected with the acceleration sensor through I2C.

Moreover, the circuit of the acceleration sensor comprises resistors R6, R7 and R8 which are hung on an acceleration sensor U4 and are bus series resistors, and resistors R4 and R5 which are connected between the acceleration sensor U4 and the embedded MCU provide stable initial levels for signals between the U4 and the embedded MCU.

Moreover, the circuit of the bridge signal acquisition circuit comprises a bridge signal acquisition chip U6, an interface P4 of an external pressure sensor probe, a voltage conversion circuit U5, a P-channel MOS tube Q4 and an NPN triode Q5, wherein the interface P4 introduces a 4-line bridge signal of the pressure sensor probe into the bridge signal acquisition chip U6, the voltage conversion circuit U5 converts the 3.6V voltage of a lithium battery into 3.0 voltage, the P-channel MOS tube Q4 and the NPN triode Q5 form a power control circuit, and the bridge signal acquisition chip U6 pulls down an ADC SPEED pin through a resistor R14 to set ADC SPEED.

The utility model has the advantages that:

1. the utility model discloses a NB-IoT communication for the super low-power consumption can realize non-maintaining, regularly through pressure measurement part monitoring ambient pressure, reach the default or take place to strike the event and trigger alarm mechanism and activate the GPS locating part when pressure, report to NB-IoT basic station by NB-IoT communication part with the information, NB-IoT basic station reports to the police to system production work order, gives appointed fortune dimension personnel's cell-phone with work order information propelling movement, carries out on-the-spot fortune dimension.

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

3. The utility model discloses an embedded MCU passes through serial digital interface connection electric bridge signal acquisition circuit, and this electric bridge signal acquisition circuit passes through electric bridge signal acquisition pressure sensor's pressure signal, and embedded MCU still connects acceleration sensor through I2C, and the design is accurate ingenious, and signal transmission is reliable.

Drawings

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

fig. 2 is a schematic circuit diagram of the acceleration sensor of the present invention;

fig. 3 is a schematic circuit diagram of the bridge signal acquisition 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 pressure sensing intelligent terminal of GPS location, includes high capacity lithium cell, power conversion, embedded MCU, BC20 module, bridge signal acquisition circuit and acceleration sensor, and the high capacity lithium cell provides power supply, and the communication module power supply is partly given in the 3.6V power supply of this lithium cell, and another part converts 3.0V through LDO power conversion chip and gives other devices power supplies on the board. The embedded MCU completes IO state, monitoring of the external pressure sensor and communication of the wireless communication module, and is a stm32l1 series single chip microcomputer of an ST manufacturer. The wireless communication module on the circuit board uses a Quectrel manufacturer BC20 module, and the module integrates NB-IOT communication and GPS positioning module functions. The embedded MCU is connected with a bridge signal acquisition circuit through a serial digital interface, the bridge signal acquisition circuit acquires a pressure signal of the pressure sensor through a bridge signal, and the embedded MCU is also connected with the acceleration sensor through I2C.

Fig. 2 is a schematic circuit diagram of an acceleration sensor, which includes an acceleration sensor U4, which is model number ADXL345, has a uA-level working current and standby current, and a communication bus is an SPI bus and has a function of detecting a physical shock event and notifying an embedded MCU through a terminal signal INT _ ADXL. Resistors R6, R7 and R8 which are connected with the acceleration sensor U4 in a hanging mode are bus series resistors, and direct current of SPI bus signals can be adjusted; resistors R4 and R5 connected between the acceleration sensor U4 and the embedded MCU provide stable initial levels for signals between the U4 and the embedded MCU.

Fig. 3 is a schematic circuit diagram of an electrical bridge signal acquisition circuit, which includes an electrical bridge signal acquisition chip U6, an external interface P4 of a pressure sensor probe, a voltage conversion circuit U5, a P-channel MOS transistor Q4, and an NPN triode Q5, where the electrical bridge signal acquisition chip U6 is a 24-bit electrical bridge signal acquisition chip ADS1231, and the interface P4 introduces a 4-line electrical bridge signal of the pressure sensor probe into the electrical bridge signal acquisition chip U6. The voltage conversion circuit U5 converts the 3.6V voltage of the lithium battery into 3.0 voltage. The P-channel MOS transistor Q4 and the NPN triode Q5 form a power control circuit, the power input of the whole bridge signal acquisition circuit is controlled, and the bridge signal acquisition chip U6 pulls down a SPEED pin through a resistor R14 to set the ADC acquisition SPEED.

The bridge signal acquisition chip U6 adopts serial digital signals for communication with the MCU, a clock line SCLK and a data line DOUT; the embedded MUC can acquire the pressure value of the external pressure sensor in real time through the bridge signal acquisition chip U6.

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 intelligent terminal is arranged near a weighing platform or a rope to be monitored through a pressure sensor probe, the terminal regularly collects the pressure sensor connected with the P4 interface, reads the GPS positioning information at that time, and reports the GPS positioning information to the NB-IoT base station through the NB-IoT for statistics; the NB-IoT base station can intuitively obtain the weight information of the goods on the test platform or the tension condition of the rope. When the terminal receives physical impact, the equipment generates alarm information, collects the state of the weighing platform or the rope to be measured at the moment, reads GPS positioning information, and reports the GPS positioning information to the NB-IoT base station to report an alarm event.

Claims

1. The utility model provides a take pressure sensing intelligent terminal of GPS location which characterized in that: the high-capacity lithium battery provides a power supply, one part of 3.6V power supply of the lithium battery supplies power to the communication module, and the other part of the 3.0V power supply is converted into 3.0V power by the LDO power conversion chip to supply power to other devices on the board; the embedded MCU completes IO state, monitoring of the external pressure sensor and communication of the wireless communication module; the BC20 module integrates NB-IOT communication and GPS positioning module functions at the same time, the embedded MCU is connected with the bridge signal acquisition circuit through a serial digital interface, the bridge signal acquisition circuit acquires pressure signals of the pressure sensor through bridge signals, and the embedded MCU is also connected with the acceleration sensor through I2C.

2. The pressure sensing intelligent terminal with GPS positioning according to claim 1, characterized in that: the circuit of the acceleration sensor comprises resistors R6, R7 and R8 which are hung on an acceleration sensor U4 and are bus series resistors, and resistors R4 and R5 which are connected between the acceleration sensor U4 and the embedded MCU provide stable initial levels for signals between the U4 and the embedded MCU.

3. The pressure sensing intelligent terminal with GPS positioning according to claim 1, characterized in that: the circuit of the bridge signal acquisition circuit comprises a bridge signal acquisition chip U6, an interface P4 of an external pressure sensor probe, a voltage conversion circuit U5, a P-channel MOS tube Q4 and an NPN triode Q5, wherein the interface P4 introduces a 4-line bridge signal of the pressure sensor probe into the bridge signal acquisition chip U6, the voltage conversion circuit U5 converts a 3.6V voltage of a lithium battery into a 3.0 voltage, the P-channel MOS tube Q4 and the NPN triode Q5 form a power control circuit, and the bridge signal acquisition chip U6 pulls down a SPEED pin through a resistor R14 to set the ADC acquisition SPEED.