CN215642311U

CN215642311U - Low-power consumption thing networking collection module circuit

Info

Publication number: CN215642311U
Application number: CN202121997456.1U
Authority: CN
Inventors: 张晖; 蒋梦梦; 王景; 姜凯
Original assignee: Shandong Inspur Scientific Research Institute Co Ltd
Current assignee: Shandong Inspur Scientific Research Institute Co Ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-01-25
Anticipated expiration: 2031-08-24

Abstract

The utility model provides a low-power consumption Internet of things acquisition module circuit. The acquisition module circuit is powered by a lithium battery, supports 485 type sensor data acquisition, supports ic type sensor data acquisition, supports 4-20MA current type sensor data acquisition and supports single bus type digital quantity sensor data acquisition. The acquisition module carries a low-power consumption ink screen, and can display the data and the network state of the acquisition module in real time. The acquisition module can transmit acquired sensor data to the cloud server through the NB-IOT module, and supports the MQTT protocol.

Description

Low-power consumption thing networking collection module circuit

Technical Field

The utility model relates to a low-power consumption Internet of things acquisition module circuit, and belongs to the technical field of Internet of things.

Background

The internet of things communication technology is mature day by day along with the vigorous development of the internet of things market, and the development of the wide area network communication technology is particularly prominent. Wide area network communication technologies can be classified into the following two types according to whether spectrum is authorized: one is unauthorized Lora and Sigfox, etc.; another example is the spectrum licensed narrowband Internet of Things (NB-IoT, Narrow Band-Internet of Things) technology, the cellular communication technology established by 3GPP, which focuses on the Internet of Things market with low power consumption and wide coverage (LPWAN). The NB-IOT technology is formally commercialized in 2016 after a narrow-band technology NB-M2M is proposed for hand-carrying Daohofeng from the beginning of 2013, and is formally incorporated into a 5G candidate technology set within 6 years, so that the NB-IoT technology is gradually recognized and approved by market in a short and short period of 6 years and becomes a mainstream technology of the 5G Internet of things in the future.

The NB-IOT may be deployed directly in a GSM network, a UMTS network, or an LTE network. The method has the advantages of low power consumption, wide coverage, low cost, large capacity and the like.

The STM32L series MCU is an ultra-low power consumption singlechip of an ideological semiconductor, and the STM32L series has five low power consumption modes, wherein the power consumption is the lowest in the standby mode, and the actually measured current is 1 uA. The actual measurement power consumption of the stop mode is 1.3uA, and the power consumption of the sleep mode is about 1 mA. The Stm32L series is widely applied to the field of sensor layer data acquisition such as environmental monitoring and intelligent agriculture by virtue of the excellent low power consumption characteristic.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a low-power consumption Internet of things acquisition module circuit which is low in power consumption, convenient to use and high in safety.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a low-power consumption Internet of things acquisition module circuit comprises a main control chip, and a lithium battery charging circuit, a lithium battery power supply circuit, an NBIOT module, an ic interface acquisition circuit, a single bus type acquisition circuit, a 4-20mA acquisition circuit, a 485 interface acquisition circuit, a download circuit, a crystal oscillator circuit, a BOOT circuit, a reset circuit and an electronic ink screen which are connected to the main control chip; the master control chip adopts a Stm32L151 master control chip, and is connected to peripheral circuits through serial ports and GPIO ports to realize data acquisition of the sensing layer;

VSUB of the lithium battery charging management chip is a positive power supply signal of a usb charging interface and is connected to a 5-pin VCC _ IN of a TP5410 charging chip, and a 6-pin BAT of the TP5410 charging management chip is connected to a positive electrode BAT _ VCC of the lithium battery through a capacitance filter circuit; a pin 1 VOUT of the TP5410 chip outputs a level signal +5 through a capacitance filter circuit;

a pin 3 of the dial switch is connected with a VUSB signal wire, a pin 1 is connected with a VCC _5V signal wire, and a pin 2 is connected with a +5 signal wire; the dial switch SW7 can switch the connection relationship between the VCC _5V signal and the +5 signal and the VUSB signal, i.e., can select the power supply mode of the circuit board to be USB power supply or battery power supply.

The 1 pin EN and the 4 pin VIN of the power supply voltage reduction chip RT8059GJ 5U 6 are connected to a VCC-5V level signal, and the 3 pin LX is connected to a VCC-3.3V level signal through an inductor L2;

the 1 pin EN and the 4 pin VIN of the power supply voltage reduction chip RT8059GJ 5U 8 are connected to a VCC-3.3V level signal, and the 3 pin LX is connected to a VCC-1.8 level signal through an inductor L3;

a pin 1 of the crystal oscillator circuit Y1 is connected with a pin 6 OSC _ OUT of the STM32L151 chip through an STM32_ OSC _ OUT signal line, and a pin 2 of the Y1 is connected with a pin 5 OSC _ IN of the STM32L151 chip through an STM32_ OSC _ IN signal line;

the 1 pin of the SW1 key of the reset circuit is connected with the 7 pin (NRST) of the STM32L151 chip through an STM32_ NRESET signal line;

a pin 1 of a resistor R8 in the BOOT circuit is connected with a pin 60 of an STM32L151 chip through an STM32_ BOOT0 signal line, and a pin 2 of the resistor R9 is connected with a pin 28 of the STM32L151 chip through an STM32F103XX _ BOOT signal line; the 1 PIN of a 3_ PIN connector in the download circuit is connected with the 46 PIN of an STM32L151 chip through an STM32_ PA13_ JTM signal line, and the 3 PIN of the 3_ PIN connector is connected with the 49 PIN of the STM32L151 chip through an STM32_ PA14_ JTC signal line;

the 485 interface acquisition circuit adopts an SP3485 chip, and a pin 1 RO of the SP3485 chip is connected with a pin 29 of an STM32L151 chip through a resistor R81; the 4-pin DI of the SP3485 chip is connected with the 30-pin of the STM32L151 chip through a resistor R80; the 2 pin of the SP3485 chip is connected with the 24 pin of the STM32L151 chip;

the 3 pins of the P16 terminal of the ic interface acquisition circuit are connected with the 59 pins of an STM32L151 chip, and the 4 pins of the IIC acquisition interface terminal are connected with the 58 pins of the STM32L151 chip;

the 2 pin of the acquisition terminal of the single bus type acquisition circuit P9 is connected with the 62 pin of the STM32L151 main control chip;

a pin 2 of a sampling resistor R69 of the 4-20mA acquisition circuit is connected with a pin 8 of an STM32L151 chip;

the electronic ink screen display circuit is as follows: the 6 pins of the electronic ink screen interface socket are connected with the 21 pins of the STM32L151 chip, the 5 pins of the socket are connected with the 23 pins of the STM32L151 chip, and the 4 pins of the socket are connected with the 26 pins of the STM32L151 chip; a pin 3 of the socket is connected with a pin 27 of the STM32L151 chip, a pin 2 of the socket is connected with a pin 20 of the STM32L151 chip, and a pin 1 of the socket is connected with a pin 25 of the STM32L151 chip;

the NBIOT module is designed based on BC28JA-02-STD, a 17-pin RXD of the BC28JA-02-STD module is connected with a 42-pin of an STM32L151 main control chip, and an 18-pin TXD of the BC28JA-02-STD module is connected with a 43-pin of the STM32L151 main control chip, so that the receiving and the sending of wireless data are realized.

The utility model has the advantages that: the acquisition module circuit is powered by a lithium battery, supports 485 type sensor data acquisition, supports ic type sensor data acquisition, supports 4-20MA current type sensor data acquisition and supports single bus type digital quantity sensor data acquisition. The acquisition module carries a low-power consumption ink screen, and can display the data and the network state of the acquisition module in real time. The acquisition module can transmit acquired sensor data to the cloud server through the NB-IOT module, and supports the MQTT protocol.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of a lithium battery charging management chip according to the present invention.

Fig. 3 is a schematic structural diagram of a power selection dial switch according to the present invention.

FIG. 4 is a schematic diagram of a 5V to 3.3V power supply voltage drop chip according to the present invention.

FIG. 5 is a schematic diagram of a 3.3V to 1.8V power supply voltage drop chip according to the present invention.

Fig. 6 is a schematic structural diagram of a main control chip according to the present invention.

FIG. 7 is a schematic diagram of a crystal oscillator circuit according to the present invention.

Fig. 8 is a schematic diagram of a reset circuit according to the present invention.

FIG. 9 is a schematic diagram of the BOOT circuit structure of the present invention.

FIG. 10 is a schematic diagram of a downloading circuit according to the present invention.

Fig. 11 is a schematic diagram of a 485 interface acquisition circuit according to the present invention.

Fig. 12 is a schematic diagram of an ic interface acquisition circuit according to the present invention.

Fig. 13 is a schematic diagram of a single bus type acquisition circuit according to the present invention.

FIG. 14 is a schematic diagram of the 4-20mA acquisition circuit of the present invention.

FIG. 15 is a schematic diagram of a display circuit of the electronic ink-jet screen according to the present invention.

FIG. 16 is a schematic structural diagram of an NBIOT module of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The patent provides a low-power consumption thing networking sensing layer acquisition module circuit.

The acquisition module circuit is powered by a lithium battery, carries a charge and discharge circuit on board, and provides a direct current power supply for the stm32L151 main control chip, the NB-IOT module, the peripheral sensor acquisition circuit, the ink screen and the like. A charging circuit based on a TP5410 chip is designed, and power is supplied to a lithium battery through a USB interface. VSUB is the anodal power supply signal of usb charging interface, is connected to 5 feet (VCC _ IN) of TP5410 charging chip, and 6 feet (BAT) of TP5410 chip are connected to anodal BAT _ VCC of lithium cell through the electric capacity filter circuit. The 1 pin (VOUT) of the TP5410 chip outputs a level signal through a capacitance filter circuit: +5.

The 1 pin (EN) and the 4 pin (VIN) of the RT8059GJ5 power supply chip U6 are connected to a VCC-5V level signal, and the 3 pin (LX) is connected to a VCC-3.3V level signal through an inductor L2.

The 1 pin (EN) and the 4 pin (VIN) of the RT8059GJ5 power supply chip U8 are connected to a VCC _3.3V level signal, and the 3 pin (LX) is connected to a VCC _1.8 level signal through an inductor L3.

The module adopts a Stm32L151 main control chip, and the chip is connected to peripheral circuits through a serial port and a GPIO port to realize data acquisition of the sensing layer.

Pin 1 of the external crystal oscillator Y1 is connected to pin 6 (OSC _ OUT) of the STM32L151 chip via the STM32_ OSC _ OUT signal line, and pin 2 of Y1 is connected to pin 5 (OSC _ IN) of the STM32L151 chip via the STM32_ OSC _ IN signal line.

The 1 pin of the SW1 key of the reset circuit is connected to the 7 pin (NRST) of the STM32L151 chip through the STM32_ NRESET signal line.

A pin 1 of a resistor R8 in the BOOT circuit is connected with a pin 60 of an STM32L151 chip through an STM32_ BOOT0 signal line. The pin 2 of the resistor R9 is connected with the pin 28 of the STM32L151 chip through an STM32F103XX _ BOOT signal line.

The 1 PIN of the 3_ PIN connector in the SWD download circuit is connected with the 46 PIN of the STM32L151 chip through an STM32_ PA13_ JTM signal line. The 3 PIN of the 3_ PIN connector is connected with the 49 PIN of the STM32L151 chip through an STM32_ PA14_ JTC signal line.

Design of a 485 type sensor acquisition circuit:

a pin 1 (RO) of the SP3485 chip is connected with a pin 29 of the STM32L151 chip through a resistor R81; the 4 pins (DI) of the SP3485 chip are connected with the 30 pins of the STM32L151 chip through a resistor R80; the 2 pin of the SP3485 chip is connected with the 24 pin of the STM32L151 chip.

ic type sensor data acquisition circuit:

the 3 feet of the IIC acquisition interface P16 terminal are connected with the 59 feet of the STM32L151 chip, and the 4 feet of the IIC acquisition interface terminal are connected with the 58 feet of the STM32L151 chip.

The design of the data acquisition circuit of the single bus type digital quantity sensor comprises the following steps:

and the 2 pins of the acquisition terminal of the single-bus type digital quantity sensor P9 are connected with the 62 pins of the STM32L151 main control chip.

4-20MA current type sensor data acquisition circuit design

And a pin 2 of a sampling resistor R69 of the 4-20MA current type sensor data acquisition circuit is connected with a pin 8 of an STM32L151 chip.

Designing a display circuit of the ink screen:

the 6 feet of the electronic ink screen interface socket are connected with the 21 feet of the STM32L151 chip, the 5 feet of the socket are connected with the 23 feet of the STM32L151 chip, and the 4 feet of the socket are connected with the 26 feet of the STM32L151 chip. The 3 pin of the socket is connected with the 27 pin of the STM32L151 chip, the 2 pin of the socket is connected with the 20 pin of the STM32L151 chip, and the 1 pin of the socket is connected with the 25 pin of the STM32L151 chip.

Claims

1. A low-power consumption Internet of things acquisition module circuit is characterized by comprising a main control chip, and a lithium battery charging circuit, a lithium battery power supply circuit, an NBIOT module, an ic interface acquisition circuit, a single bus type acquisition circuit, a 4-20mA acquisition circuit, a 485 interface acquisition circuit, a download circuit, a crystal oscillator circuit, a BOOT circuit, a reset circuit and an electronic ink screen which are connected to the main control chip; the master control chip adopts a Stm32L151 master control chip, and is connected to peripheral circuits through serial ports and GPIO ports to realize data acquisition of the sensing layer;

a pin 3 of the dial switch is connected with a VUSB signal wire, a pin 1 is connected with a VCC _5V signal wire, and a pin 2 is connected with a +5 signal wire; the dial switch SW7 can switch the connection relation between the VCC _5V signal and the +5 signal and the VUSB signal, namely, the power supply mode of the circuit board can be selected to supply power for USB or battery;