Low-power-consumption LoRA wireless communication data acquisition equipment

Abstract

The utility model discloses a low power consumption LoRA wireless communication data acquisition device, which is provided with a power supply management module, a master control module is electrically connected with a power supply on-off controlled end of the power supply management module, and an output end of the power supply management module is electrically connected with a power supply end of a data acquisition module; on the basis, when the equipment enters the sleep mode, the main control module controls the power management module to cut off power supply to the data acquisition module, so that the data acquisition module is closed, and the purpose of reducing power consumption is achieved; therefore, under the condition that the power supply is limited, the operation power consumption of the equipment can be reduced, so that the operation time of the equipment can be prolonged, the operation and maintenance cost can be reduced, and the adaptability of the equipment can be enhanced, therefore, the data acquisition equipment can be more easily deployed in various environments, and is very suitable for large-scale application and popularization in the field of data acquisition equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of data acquisition equipment, and specifically relates to a low-power LoRA wireless communication data acquisition device. Background Art

[0002] The data acquisition terminal is an important part of the Internet of Things system. It is responsible for collecting data from various sensors and sending this data to the central server or cloud platform through a wireless network for processing and analysis. In this application scenario, low-power LoRa wireless communication technology is particularly important because it can significantly extend the battery life of the data acquisition terminal, reduce maintenance costs, and improve the reliability and stability of the system; at the same time, with the rapid development of Internet of Things technology, people's demand for low-power and long-distance communication capabilities is also increasing, which requires that the data acquisition terminal must also have low-power characteristics. However, the power consumption of existing data acquisition terminals is mostly high, which can no longer meet the existing low-power Internet of Things data collection needs; based on this, the development of a low-power data acquisition terminal based on LoRa technology has become a hot spot for research and application. Utility Model Content

[0003] The utility model aims to provide a low-power LoRA wireless communication data acquisition device to solve the problem of high power consumption in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In a first aspect, a low-power LoRA wireless communication data acquisition device is provided, comprising:

[0006] A main control module and a data acquisition module, wherein the input end of the data acquisition module is electrically connected to a data monitoring device, the output end of the data acquisition module is electrically connected to the main control module, and the main control module is connected to an external device via a LoRA communication device;

[0007] A power management module, wherein the power supply input end of the power management module is electrically connected to a power supply, the output end of the power management module is electrically connected to a power supply end of the data acquisition module, the power supply is electrically connected to a power supply end of the main control module, and the power supply control end of the main control module is electrically connected to a power switch controlled end of the power management module.

[0008] Based on the above disclosed content, the LoRA wireless communication data acquisition device provided by the utility model is provided with a power management module, wherein the main control module is electrically connected to the power switch controlled end of the power management module, and the output end of the power management module is electrically connected to the power supply end of the data acquisition module; based on this, when the device enters the sleep mode, the main control module can control the power management module to cut off the power supply to the data acquisition module, thereby turning off the data acquisition module to achieve the purpose of reducing power consumption; in this way, the utility model can reduce the operating power consumption of the equipment under limited power supply conditions, thereby extending the operating time of the equipment, reducing operation and maintenance costs, and enhancing the adaptability of the equipment. Based on this, the utility model can be more easily deployed in various environments, and is very suitable for large-scale application and promotion in the field of data acquisition equipment.

[0009] In a possible design, the data acquisition module includes: an analog quantity acquisition unit, a sensor acquisition unit and an RS485 data acquisition unit, and the power management module includes a first power supply unit and a second power supply unit;

[0010] The input end of the analog quantity acquisition unit is electrically connected to the temperature acquisition device, and the output end of the analog quantity acquisition unit is electrically connected to the first input end of the main control module;

[0011] The input end of the sensor acquisition unit is electrically connected to at least one external sensor, and the output end of the sensor acquisition unit is electrically connected to the second input end of the main control module;

[0012] The input end of the RS485 data acquisition unit is electrically connected to the external industrial equipment, and the output end of the RS485 data acquisition unit is electrically connected to the third input end of the main control module;

[0013] The input end of the first power supply unit is electrically connected to the power supply, wherein the first output end of the first power supply unit is electrically connected to the power supply end of the sensor acquisition unit, the second output end of the first power supply unit is electrically connected to the power supply end of the RS485 data acquisition unit, and the first control end of the main control module is electrically connected to the power on / off controlled end of the first power supply unit;

[0014] The input end of the second power supply unit is electrically connected to the power supply, wherein the output end of the second power supply unit is electrically connected to the power supply end of the analog quantity acquisition unit, and the second control end of the main control module is electrically connected to the power on / off controlled end of the second power supply unit.

[0015] In a possible design, the first power supply unit includes: a MOS tube and a triode;

[0016] The source of the MOS tube is electrically connected to the power supply and one end of the first resistor, and the gate of the MOS tube and the other end of the first resistor are both electrically connected to the collector of the triode, wherein the base of the triode is electrically connected to one end of the second resistor, and the other end of the second resistor serves as the power switch controlled end of the first power supply unit and is electrically connected to the first control end of the main control module, and the emitter of the triode is grounded;

[0017] The drain of the MOS tube serves as the first output end of the first power supply unit and is electrically connected to the power supply end of the sensor acquisition unit, wherein the drain of the MOS tube is also electrically connected to one end of a jumper switch, and the other end of the jumper switch serves as the second output end of the first power supply unit and is electrically connected to the power supply end of the RS485 data acquisition unit.

[0018] In a possible design, the second power supply unit includes: a low voltage dropout linear regulator, a third resistor, a first capacitor and a second capacitor;

[0019] The input end of the low-voltage difference linear regulator is electrically connected to the power supply, one end of the first capacitor and one end of the second capacitor, and the ground end of the low-voltage difference linear regulator, the other end of the first capacitor and the other end of the second capacitor are grounded respectively, wherein the output end of the low-voltage difference linear regulator is electrically connected to the power supply end of the analog quantity acquisition unit, and the power switch controlled end of the low-voltage difference linear regulator is electrically connected to the second control end of the main control module through the third resistor.

[0020] In a possible design, the output end of the low voltage dropout linear regulator is also electrically connected to a filter circuit, and the filter circuit includes a third capacitor and a fourth capacitor;

[0021] Among them, the output end of the low voltage difference linear regulator is electrically connected to the power supply end of the analog quantity acquisition unit, one end of the third capacitor and one end of the fourth capacitor, and the other end of the third capacitor and the other end of the fourth capacitor are grounded respectively.

[0022] In one possible design, the second power supply unit includes a ME6211C28M5G low-dropout linear regulator.

[0023] In one possible design, the sensor acquisition unit adopts an I2C interface device, and the RS485 data acquisition unit includes an SP3485 transceiver.

[0024] In one possible design, the power supply input end of the power management module is electrically connected to the power supply through a power supply circuit, and the power supply circuit includes a diode, a fourth resistor and a single-pole double-throw switch;

[0025] The first fixed contact of the single-pole double-throw switch is electrically connected to the power supply through the diode, wherein the second fixed contact of the single-pole double-throw switch is grounded through the fourth resistor, and the moving contact of the single-pole double-throw switch is electrically connected to the power supply input end of the power management module and the power supply end of the main control module respectively.

[0026] In one possible design, the LoRA communication device includes a LoRA gateway, and the external device includes a cloud server and a user terminal, wherein the main control module is communicatively connected to the cloud server via the LoRA gateway, and the cloud server is communicatively connected to the user terminal.

[0027] In a possible design, the main control module uses an ASR6601CB main control chip and its peripheral circuits.

[0028] Beneficial effects:

[0029] (1) The present invention can reduce the power consumption of the device under limited power conditions, thereby extending the operating time of the device, reducing operation and maintenance costs, and enhancing the adaptability of the device. Based on this, the present invention can be more easily deployed in various environments and is very suitable for large-scale application and promotion in the field of data acquisition equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A structural block diagram of a low-power LoRA wireless communication data acquisition device provided by an embodiment of the utility model;

[0031] Figure 2 A specific circuit diagram of the first part of the main control module provided by the embodiment of the utility model;

[0032] Figure 3 A specific circuit diagram of the second part of the main control module provided by the embodiment of the utility model;

[0033] Figure 4 A circuit diagram of a radio frequency switch module provided in an embodiment of the utility model;

[0034] Figure 5 A specific circuit diagram of an analog quantity acquisition unit provided in an embodiment of the utility model;

[0035] Figure 6 A specific circuit diagram of a sensor acquisition unit provided in an embodiment of the utility model;

[0036] Figure 7 A specific circuit diagram of the SP3485 transceiver provided in the embodiment of the utility model;

[0037] Figure 8A specific circuit diagram of a first power supply unit provided in an embodiment of the utility model;

[0038] Fig. 9 A specific circuit diagram of a second power supply unit provided in an embodiment of the utility model;

[0039] Fig.10 A specific circuit diagram of a power supply circuit provided for an embodiment of the utility model;

[0040] Fig.11 A schematic diagram of current monitoring of the device in a dormant state provided by an embodiment of the utility model;

[0041] Fig.12 A schematic diagram of power monitoring of the device in the transmitting state provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0043] It should be understood that although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, a first unit can be referred to as a second unit, and similarly, a second unit can be referred to as a first unit without departing from the scope of the exemplary embodiments of the present utility model.

[0044] It should be understood that the term "and / or" that may appear in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" that may appear in this article describes another type of association object relationship, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " that may appear in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0045] Example:

[0046] See also Figures 1 to 12As shown, the low-power LoRA wireless communication data acquisition device provided in this embodiment may include but is not limited to a main control module, a data acquisition module, a LoRA communication device and a power management module; wherein the input end of the data acquisition module is electrically connected to a data monitoring device for receiving various monitoring data sent by the data monitoring device, and the output end of the data acquisition module is electrically connected to the main control module for sending the received monitoring data to the main control module; at the same time, the main control module is also connected to an external device through the LoRA communication device; in this way, the received monitoring data can be uploaded to the external device through the LoRA communication device, so as to realize data analysis and processing through the external device.

[0047] In specific implementation, in order to reduce the power consumption of the data acquisition device during operation, the present embodiment is provided with a power management module capable of performing power on and off control, wherein the connection structure of the power management module is as follows: the power supply input terminal of the power management module is electrically connected to a power supply (such as a battery), the output terminal of the power management module is electrically connected to the power supply terminal of the data acquisition module, the power supply is electrically connected to the power supply terminal of the main control module, and the power supply control terminal of the main control module is electrically connected to the power on and off controlled terminal of the power management module.

[0048] Therefore, through the above-mentioned design, this embodiment can control the power management module through the main control module to cut off the power supply to the data acquisition module when the entire device enters the sleep mode, thereby shutting down the data acquisition module; based on this, this device can reduce its own operating power consumption under limited power conditions, thereby extending the operating time, reducing operation and maintenance costs, and enhancing adaptability of use.

[0049] See also Figures 2 to 10 As shown, the following discloses the specific circuit structure of each circuit module in the aforementioned data acquisition device.

[0050] Firstly, a circuit structure of a main control module is disclosed.

[0051] In a specific implementation, the main control module may be, but is not limited to, an ASR6601CB main control chip and its peripheral circuits; wherein the chip integrates a Sub-GHz RF transceiver and a 32-bit ARM MCU, and the Sub-GHz RF transceiver not only supports LoRa modulation, but also supports modulation modes such as (G)FSK and G(MSK); wherein the specific circuit diagram of the ASR6601CB main control chip can be found in Figure 2 and Figure 3 shown.

[0052] Furthermore, the present embodiment is also provided with a radio frequency switch module, which is electrically connected to the main control module for realizing the radio frequency driving function. Of course, the radio frequency switch module is a LoRA radio frequency switch; specifically, the LoRA radio frequency switch can be but is not limited to using an XMSSJR6G0BA-093 radio frequency switch chip and its peripheral circuit, and its specific circuit diagram can be seen in Figure 4 shown.

[0053] Secondly, the following discloses one circuit structure of the data acquisition module and the power management module.

[0054] In this embodiment, the data acquisition module may include but is not limited to: an analog quantity acquisition unit, a sensor acquisition unit and an RS485 data acquisition unit, the data monitoring device may include a temperature acquisition device, an external industrial device and at least one sensor, and the power management module may include but is not limited to a first power supply unit and a second power supply unit.

[0055] Among them, the connection structure of the aforementioned analog quantity acquisition unit, sensor acquisition unit and RS485 data acquisition unit is:

[0056] The input end of the analog quantity acquisition unit is electrically connected to a temperature acquisition device (such as a PT100 temperature sensor), and the output end of the analog quantity acquisition unit is electrically connected to a first input end of the main control module; at the same time, the input end of the sensor acquisition unit is electrically connected to at least one external sensor (such as a pressure sensor, a humidity sensor, etc.), and the output end of the sensor acquisition unit is electrically connected to a second input end of the main control module; similarly, the input end of the RS485 data acquisition unit is electrically connected to an external industrial device (which may also include building equipment, etc.), and its corresponding output end is electrically connected to a third input end of the main control module; in this way, the collection of different types of data can be achieved through the aforementioned three acquisition units.

[0057] In specific applications, this embodiment configures the above-mentioned three acquisition units with two power supply units, namely the above-mentioned first power supply unit and the second power supply unit; wherein, the input end of the first power supply unit is electrically connected to the power supply, the first output end of the first power supply unit is electrically connected to the power supply end of the sensor acquisition unit, the second output end of the first power supply unit is electrically connected to the power supply end of the RS485 data acquisition unit, and the first control end of the main control module is electrically connected to the power switch controlled end of the first power supply unit; similarly, the input end of the second power supply unit is electrically connected to the power supply, the output end of the second power supply unit is electrically connected to the power supply end of the analog acquisition unit, and the second control end of the main control module is electrically connected to the power switch controlled end of the second power supply unit; in this way, the power supply control of the above-mentioned three acquisition units can be realized through the main control module and the above-mentioned two power supply units.

[0058] Furthermore, the following discloses one circuit structure of the first power supply unit and the second power supply unit.

[0059] In this embodiment, the first power supply unit may include, but is not limited to, a MOS transistor Q1 and a triode Q2, wherein the specific connection structure of the two electronic devices is as follows:

[0060] See also Figure 8 As shown, the source of the MOS tube Q1 is electrically connected to the power supply and one end of the first resistor R15, and the gate of the MOS tube Q1 and the other end of the first resistor R15 are electrically connected to the collector of the transistor Q2, wherein the base of the transistor Q2 is electrically connected to one end of the second resistor R16, and the other end of the second resistor R16 serves as the power switch controlled end of the first power supply unit, and is electrically connected to the first control end of the main control module (that is, connected to the 7th pin of the ASR6601CB main control chip), and the emitter of the transistor Q2 is grounded.

[0061] At the same time, the drain of the MOS tube Q1 serves as the first output end of the first power supply unit and is electrically connected to the power supply end of the sensor acquisition unit (ie Figure 8 The VCC_EN in the sensor data acquisition unit is used as the power supply of the sensor acquisition unit), wherein the drain of the MOS tube Q1 is also electrically connected to one end of the jumper switch J1, and the other end of the jumper switch J1 serves as the second output end of the first power supply unit and is electrically connected to the power supply end of the RS485 data acquisition unit (that is, VDD serves as the power supply end of the RS485 data acquisition unit).

[0062] Based on the above description, the transistor Q2 and the MOS tube Q1 can be used to control the on and off of VCC_EN and VDD, thereby realizing the power supply control of the sensor acquisition unit and the RS485 data acquisition unit.

[0063] Similarly, the second power supply unit may include, but is not limited to: a ME6211C28M5G low voltage dropout linear regulator U4, a third resistor R17, a first capacitor C8, and a second capacitor C9; wherein the specific connection structure of the aforementioned electronic components is:

[0064] See also Fig. 9As shown, the input end of the ME6211C28M5G low voltage drop linear regulator U4 (i.e., the VIN pin of U4) is electrically connected to the power supply, one end of the first capacitor C8, and one end of the second capacitor C9, and the ground end of the ME6211C28M5G low voltage drop linear regulator U4 (i.e., the GND pin of U4), the other end of the first capacitor C8, and the other end of the second capacitor C9 are grounded respectively, wherein the ME6211C28M5G low voltage drop linear regulator U4 is connected to the power supply, one end of the first capacitor C8, and one end of the second capacitor C9 are connected to the ground respectively. The output end of the low-voltage difference linear regulator U4 (i.e., the OUT pin of U4) is electrically connected to the power supply end of the analog quantity acquisition unit (i.e., outputting a 2.8V DC voltage to power the analog quantity acquisition unit), and the power switch controlled end of the low-voltage difference linear regulator U4 (i.e., the CE pin of U4) is electrically connected to the second control end of the main control module through the third resistor R17; based on the above explanation, the power supply of the analog quantity acquisition unit can be controlled by the ME6211C28M5G low-voltage difference linear regulator U4.

[0065] Thus, through the above explanation, the working principle of the above two power supply units is: using a combination switch circuit of a triode and a MOS tube, and using the PA9 pin (i.e. the aforementioned 7th pin) of the main control module to control the switch of the VCC_EN power supply, that is, turning off the VCC_EN power supply during sleep mode to reduce power consumption. At the same time, the PA15 and PA14 pins of the main control module need to be set to a high level during sleep mode to prevent leakage current during sleep mode. Further, VDD is controlled by the J1 jumper. When J1 is disconnected, VDD is always disconnected, and when J1 is connected, VDD is equivalent to VCC_EN. In this way, based on the above first power supply unit, the on and off control of the power supply of the sensor acquisition unit and the RS485 data acquisition unit can be realized. Similarly, a low-voltage difference linear regulator is used as the power switch of the analog acquisition unit. When in sleep mode, the low-voltage difference linear regulator is controlled by the main control module to turn off the 2.8V power supply, thereby cutting off the power supply of the analog acquisition unit, thereby achieving the purpose of reducing sleep power consumption.

[0066] In a specific embodiment, in order to improve the measurement accuracy, the present embodiment further provides a filtering circuit, that is, the output end of the ME6211C28M5G low voltage difference linear regulator U4 is also electrically connected to the filtering circuit, and the filtering circuit includes a third capacitor C10 and a fourth capacitor C11; wherein, when in use, the output end of the ME6211C28M5G low voltage difference linear regulator U4 is electrically connected to the power supply end of the analog quantity acquisition unit, one end of the third capacitor C10 and one end of the fourth capacitor C11, and the other end of the third capacitor C10 and the other end of the fourth capacitor C11 are grounded respectively; based on this, the power supply filtering can be performed by the filtering capacitor, thereby achieving the purpose of improving the temperature measurement accuracy.

[0067] Optionally, in this embodiment, the sensor acquisition unit adopts an I2C interface device, and the RS485 data acquisition unit includes an SP3485 transceiver.

[0068] The circuit diagram of the analog quantity acquisition unit can be found in Figure 5 As shown, it uses the internal ADC_CH0 of the chip for data transmission. Specifically, the PT100 temperature sensor is electrically connected to the PIN4 and PIN3 pins of the connector P5 ( Figure 5 PIN4 and PIN3 are connected to the ADC_CH0 pin inside the chip, one end of the resistor R7, one end of the resistor R8 and one end of the capacitor C5, and the other end of the resistor R7, the other end of the resistor R8 and the other end of the capacitor C5 are grounded respectively; through the above design, the voltage division value of the resistors R7 and R8 can be used to calculate the resistance value of PT100, thereby obtaining the measured temperature.

[0069] Similarly, the circuit diagram of the I2C interface device can be found in Figure 6 As shown, the corresponding third pin and fourth pin are electrically connected to the PA15_IIC_SDA pin and PA14_IIC_SCL pin of the ASR6601CB main control chip respectively, and the third pin and fourth pin are also connected to the power supply through a resistor (ie Figure 6 Resistors R5 and R6 in the figure); Based on this, the data transmission of each sensor can be realized through the I2C bus; In addition, the specific circuit diagram of the SP3485 transceiver can be found in Figure 7 As shown, the circuit structure is not described in detail here.

[0070] After completing the detailed circuit description of the aforementioned data acquisition module and the power management module, this embodiment also provides a power supply circuit for the entire device; specifically, in actual use, the power supply input end of the power management module is electrically connected to the power supply through the power supply circuit; at the same time, the power supply circuit may include, but is not limited to, a diode D1, a fourth resistor R1, and a single-pole double-throw switch S1, wherein the specific connection structure of the aforementioned components is:

[0071] See also Fig.10 As shown, the first fixed contact of the single-pole double-throw switch S1 is electrically connected to the power supply (i.e., the battery) through the diode D1, wherein the second fixed contact of the single-pole double-throw switch S1 is grounded through the fourth resistor R1, and the moving contact of the single-pole double-throw switch S1 is electrically connected to the power supply input end of the power management module and the power supply end of the main control module respectively; in this way, the aforementioned single-pole double-throw switch S1 can be used to control the power supply of the entire device.

[0072] Finally, this embodiment provides the specific composition of the aforementioned LoRA communication device and external device; wherein, the LoRA communication device includes a LoRA gateway, and the external device includes a cloud server and a user terminal. Thus, in the specific implementation, the main control module is connected to the cloud server through the LoRA gateway communication (of course, the main control module drives the radio frequency signal through the aforementioned radio frequency switch module), and the cloud server is connected to the user terminal in communication; based on this, data upload can be realized based on LoRA wireless communication, and the cloud server can feed back data to the user terminal, so that the user can monitor the data in real time; of course, for example, a 4G network can be used for communication between the cloud server and the user terminal.

[0073] In addition, this embodiment also provides a power diagram of the device in the sleep state and the LORA state; wherein, in the sleep state, the power of the entire device is 6.14uW, which can be seen in Fig.11 As shown; in the LORA state, its power is 277mW, see Fig.12 As shown; based on this, it can be explained that the device can greatly reduce the operating power consumption when the device is in sleep mode, thereby extending the operating time of the device.

[0074] Therefore, through the above detailed description of the low-power LoRA wireless communication data acquisition device, the utility model has the following

[0075] Beneficial effects:

[0076] (1) Extending device operating time: Low power consumption design allows the terminal to operate longer with limited power sources, such as batteries, reducing the frequency of power supply replacement or charging.

[0077] (2) Reduced operation and maintenance costs: Low-power terminals require very little energy consumption and maintenance, which directly reduces the total cost of long-term operations.

[0078] (3) Strong adaptability: Low-power terminals can be more easily deployed in various environments, including areas where wiring is inconvenient and access to the power grid is difficult, which increases the flexibility of their application.

[0079] In summary, the designed low-power LoRa wireless communication data acquisition device can effectively improve the efficiency and reliability of the equipment, reduce operation and maintenance costs, meet the needs of different application scenarios, and provide users with better services.

[0080] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-power LoRA wireless communication data acquisition device, characterized in that: include: A main control module and a data acquisition module, wherein the input end of the data acquisition module is electrically connected to a data monitoring device, the output end of the data acquisition module is electrically connected to the main control module, and the main control module is connected to an external device via a LoRA communication device; A power management module, wherein the power supply input end of the power management module is electrically connected to a power supply, the output end of the power management module is electrically connected to a power supply end of the data acquisition module, the power supply is electrically connected to a power supply end of the main control module, and the power supply control end of the main control module is electrically connected to a power switch controlled end of the power management module.

2. A low-power LoRA wireless communication data acquisition device according to claim 1, characterized in that: The data acquisition module includes: an analog quantity acquisition unit, a sensor acquisition unit and an RS485 data acquisition unit, and the power management module includes a first power supply unit and a second power supply unit; The input end of the analog quantity acquisition unit is electrically connected to the temperature acquisition device, and the output end of the analog quantity acquisition unit is electrically connected to the first input end of the main control module; The input end of the sensor acquisition unit is electrically connected to at least one external sensor, and the output end of the sensor acquisition unit is electrically connected to the second input end of the main control module; The input end of the RS485 data acquisition unit is electrically connected to the external industrial equipment, and the output end of the RS485 data acquisition unit is electrically connected to the third input end of the main control module; The input end of the first power supply unit is electrically connected to the power supply, wherein the first output end of the first power supply unit is electrically connected to the power supply end of the sensor acquisition unit, the second output end of the first power supply unit is electrically connected to the power supply end of the RS485 data acquisition unit, and the first control end of the main control module is electrically connected to the power on / off controlled end of the first power supply unit; The input end of the second power supply unit is electrically connected to the power supply, wherein the output end of the second power supply unit is electrically connected to the power supply end of the analog quantity acquisition unit, and the second control end of the main control module is electrically connected to the power on / off controlled end of the second power supply unit.

3. A low-power LoRA wireless communication data acquisition device according to claim 2, characterized in that: The first power supply unit comprises: a MOS tube (Q1) and a triode (Q2); The source of the MOS tube (Q1) is electrically connected to the power supply and one end of the first resistor (R15), and the gate of the MOS tube (Q1) and the other end of the first resistor (R15) are both electrically connected to the collector of the triode (Q2), wherein the base of the triode (Q2) is electrically connected to one end of the second resistor (R16), and the other end of the second resistor (R16) serves as the power switch controlled end of the first power supply unit and is electrically connected to the first control end of the main control module, and the emitter of the triode (Q2) is grounded; The drain of the MOS tube (Q1) serves as a first output end of the first power supply unit and is electrically connected to a power supply end of the sensor acquisition unit, wherein the drain of the MOS tube (Q1) is also electrically connected to one end of a jumper switch, and the other end of the jumper switch serves as a second output end of the first power supply unit and is electrically connected to a power supply end of the RS485 data acquisition unit.

4. A low-power LoRA wireless communication data acquisition device according to claim 2, characterized in that: The second power supply unit comprises: a low voltage difference linear regulator, a third resistor (R17), a first capacitor (C8) and a second capacitor (C9); The input end of the low-voltage difference linear regulator is electrically connected to the power supply, one end of the first capacitor (C8) and one end of the second capacitor (C9), and the ground end of the low-voltage difference linear regulator, the other end of the first capacitor (C8) and the other end of the second capacitor (C9) are grounded respectively, wherein the output end of the low-voltage difference linear regulator is electrically connected to the power supply end of the analog quantity acquisition unit, and the power switch controlled end of the low-voltage difference linear regulator is electrically connected to the second control end of the main control module through the third resistor (R17).

5. A low-power LoRA wireless communication data acquisition device according to claim 4, characterized in that: The output end of the low voltage difference linear regulator is also electrically connected to a filter circuit, and the filter circuit includes a third capacitor (C10) and a fourth capacitor (C11); The output end of the low voltage difference linear regulator is electrically connected to the power supply end of the analog quantity acquisition unit, one end of the third capacitor (C10) and one end of the fourth capacitor (C11), respectively, and the other end of the third capacitor (C10) and the other end of the fourth capacitor (C11) are grounded respectively.

6. A low-power LoRA wireless communication data acquisition device according to claim 4, characterized in that: The second power supply unit includes a ME6211C28M5G low voltage dropout linear regulator.

7. A low-power LoRA wireless communication data acquisition device according to claim 2, characterized in that: The sensor acquisition unit adopts an I2C interface device, and the RS485 data acquisition unit includes an SP3485 transceiver.

8. A low-power LoRA wireless communication data acquisition device according to claim 1, characterized in that: The power supply input end of the power management module is electrically connected to the power supply through a power supply circuit, and the power supply circuit includes a diode (D1), a fourth resistor (R1) and a single-pole double-throw switch (S1); The first fixed contact of the single-pole double-throw switch (S1) is electrically connected to the power supply via the diode (D1), wherein the second fixed contact of the single-pole double-throw switch (S1) is grounded via the fourth resistor (R1), and the moving contact of the single-pole double-throw switch (S1) is electrically connected to the power supply input end of the power management module and the power supply end of the main control module respectively.

9. A low-power LoRA wireless communication data acquisition device according to claim 1, characterized in that: The LoRA communication device includes a LoRA gateway, and the external device includes a cloud server and a user terminal, wherein the main control module is communicatively connected to the cloud server via the LoRA gateway, and the cloud server is communicatively connected to the user terminal.

10. A low-power LoRA wireless communication data acquisition device according to claim 1, characterized in that: The main control module adopts ASR6601CB main control chip and its peripheral circuits.

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