CN216081752U - Intelligent weighing system based on LoRa module - Google Patents

Abstract

The utility model provides an intelligence weighing system based on loRa module, belongs to measuring tool technical field. The system is characterized in that a plurality of groups of LoRa weighing subsystems carry out data transmission with a server through a LoRa concentrator; each group of LoRa weighing subsystems includes: weighing sensor, ADC chip of weighing, loRa module. The MCU processor carries a LoRa power supply control module for controlling the power supply of the LoRa module. The utility model has simple and reasonable structure, and has the characteristics of low power consumption, long-distance transmission, ad hoc network, convenient data management and the like after the LoRa module and the LoRa concentrator are adopted.

Description

Intelligent weighing system based on LoRa module

Technical Field

The utility model relates to an intelligent weighing system based on a LoRa module, and belongs to the technical field of metering tools.

Background

The existing weighing device can only obtain the weight of a measured object during measurement, but cannot save the weight data of the measured object, so that a user cannot compare the weight change of the measured object. At present, a weighing device on the market is started in a mechanical vibration mode, and power consumption after starting is a problem which is concerned by users.

Furthermore, the authorization notice number is: CN 202420641U, an intelligent weighing scale, including a data acquisition module, the data acquisition module is connected with a microcontroller module through an A/D conversion interface, the microcontroller module is electrically connected with a human-computer interaction module, the microcontroller module is connected with a monitoring computer through a ZigBee wireless transmission module, the human-computer interaction module includes a key module and a display module, the whole system changes the weight information of human body into electric signal through a pressure sensor, the electric signal is changed into digital signal after AD conversion, the digital signal is processed by the microcontroller module, displayed through an LCD screen and sent to the monitoring computer through the ZigBee wireless transmission module, the monitoring computer records and analyzes the information of user, under the condition of no weighing, the whole system is in a dormant state, the system is awakened by adopting a timing awakening mode, after waking up, if no weight is detected, the device continues to enter the sleep mode, so that the purpose of saving power is achieved. Although the purpose of saving power can be achieved to a certain extent, the problem of time confusion may occur when the mobile phone is powered on again for use, so that recording and analysis of user data are inaccurate, and evaluation of the user on the body of the user is affected.

At present, LoRa is a linear frequency modulation spread spectrum modulation technology, which is called Long Range Radio (Long Range Radio), and is widely applied to various vertical industries of the internet of things because many advantageous characteristics of Long transmission distance, low power consumption, flexible networking and the like are incompatible with the requirements of fragmentation, low cost and large connection of the internet of things.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides an intelligent weighing system based on a LoRa module, which has low power consumption and long-distance transmission and can be self-organized.

The technical scheme of the utility model is as follows:

the utility model provides an intelligence weighing system based on loRa module, characterized by, carry out data transmission through loRa concentrator and server by a plurality of groups loRa weighing subsystem.

Wherein, every group LoRa weighing subsystem includes:

the weighing sensor is used for detecting physical deformation generated by a detected object and converting the physical deformation into a voltage signal;

the weighing ADC chip is used for detecting an analog signal of the weighing sensor and converting the analog signal into a digital signal;

the MCU processor is carried with an MCU power module and a LoRa power control module; the LoRa power supply control module is connected with the LoRa power supply module and used for controlling power supply of the LoRa module; the MCU processor is also provided with a weighing arithmetic unit and a perpetual calendar timing module;

the key input module is connected with the input end of the MCU processor and is used for data input during database establishment;

the EEPROM storage module is connected with the MCU processor and is used for storing the product number and the monomer weight of the tested object;

the LED nixie tube display module is connected with the output end of the MCU processor and used for displaying when a database is established so as to realize visual operation;

the LoRa module is in data transmission with the MCU through a serial port communication module and is in wireless communication with the LoRa concentrator through a LoRa wireless transmission module; the LoRa power module is also provided with a LoRa power module for providing power for the LoRa power module; the output of loRa module is connected with the pilot lamp for instruct operating condition and the network deployment state of loRa module.

Furthermore, the server is a remote cloud platform, and can access the remote cloud platform through a computer to inquire and manage the database.

Further, the LoRa weighing subsystem is a weighing pad.

The innovation points of the utility model are as follows:

1) in the product of the utility model, the MCU processor is provided with a perpetual calendar timing module which can acquire the time of a server to carry out perpetual calendar timing and is used as a reference for automatically measuring weight after waking up the LoRa module;

2) the product of the utility model can set product numbers and product singles of various tested objects through the key input module, and is independently stored in the EEPROM storage module;

3) the product is provided with the LED nixie tube display module, can perform visual operation when the product number and the product unit weight are set, and can display the total weight and the total quantity of a detected object during measurement;

4) according to the utility model, the LoRa modules and matched LoRa concentrators realize ad hoc network, a local area network with the LoRa concentrators as the center is established, and at most 200 LoRa modules can be mounted on 1 LoRa concentrator; each LoRa module is not directly connected with the server, but exchanges data with the server through the LoRa concentrator;

5) the LoRa power supply control module can receive the output of the MCU processor, so as to achieve the purpose of controlling the LoRa power supply module to provide power for the LoRa module; LoRa module work when the power supply, and the LoRa module is out of work during the outage, reduces the consumption of electric quantity, reaches the purpose of power saving.

The utility model has simple and reasonable structure, and has the characteristics of low power consumption, long-distance transmission, ad hoc network, convenient data management and the like after the LoRa module and the LoRa concentrator are adopted.

Drawings

Fig. 1 is a schematic structural diagram of an intelligent weighing system based on a LoRa module according to an embodiment of the present invention;

FIG. 2 is a schematic circuit diagram of the MCU processor of FIG. 1;

FIG. 3 is a schematic circuit connection diagram of the MCU power module of FIG. 1;

FIG. 4 is a schematic circuit diagram of the LoRa power control module of FIG. 1;

FIG. 5 is a schematic circuit diagram of the LoRa module of FIG. 1;

FIG. 6 is a schematic circuit diagram of the turn-on button of FIG. 1;

FIG. 7 is a schematic circuit diagram of a power module of the product of FIG. 1;

FIG. 8 is a schematic circuit diagram of the weighing ADC chip of FIG. 1;

FIG. 9 is a schematic circuit diagram of the EEPROM of FIG. 1;

fig. 10 is a schematic circuit connection diagram of the LED nixie tube display module in fig. 1.

Detailed Description

As shown in the figure, an intelligence weighing system based on loRa module, whole power module be dual power supply, both can use transformer (6V) also can be with battery powered, and these two kinds of power supply modes can make up at will, both can supply power simultaneously, also can supply power alone, and power module is connected with MCU power module and loRa power module electricity, provides the power for whole circuit.

MCU power module is connected with the MCU treater electricity for provide stable power and give MCU treater work, loRa power module is connected with loRa module electricity, is used for providing stable power and gives loRa module work. The output end of the MCU processor is connected with the LoRa power supply control module, and the output end of the LoRa power supply control module is connected with the LoRa module. The LoRa power control module between MCU treater and the LoRa power module for receive the instruction of MCU treater, and control whether the LoRa power module provides the power for the LoRa module.

The input end of the MCU processor is provided with a key input module for data input during database establishment; the output end of the MCU processor is provided with an LED nixie tube display module which is used for visual operation of database input and measured parameters of a measured object, and the MCU processor instructs the display module to enter a shutdown state after measurement is finished, so that the consumption of electric quantity is reduced, and the aim of saving electricity is fulfilled; the MCU processor is also provided with an EEPROM storage module for storing the product number and the product unit weight of the tested object so as to establish an internal database; the input end of the MCU processor is also connected with a weighing ADC chip, and the weighing ADC chip is used for acquiring a voltage output signal of the weighing sensor and converting the voltage output signal into a digital signal; the ADC chip of weighing acquires the weight of the measured object, and after the measurement is completed, the MCU processor instructs the measured object to enter a shutdown state, so that the consumption of electric quantity is reduced, and the purpose of saving electricity is achieved.

And a serial port communication module of the MCU processor is connected with the LoRa module. And the LoRa module is used for establishing a local area network and realizing data transmission in the serial port communication module. And the LoRa concentrator is used for local area networking management and data transmission of the LoRa module, and realizes data exchange between the LoRa module and the server. The LoRa module and the LoRa concentrator are in wireless communication, the establishment of a local area network and the transfer of server data are synchronously realized, and data transmission is realized through the serial port communication module and the MCU processor. The LoRa module is wirelessly connected with the LoRa concentrator, and at most 200 LoRa modules can be matched with one LoRa concentrator to form an internal local area network, and the LoRa concentrator transfers the instructions of the server.

In order to achieve the purpose of saving power while realizing accurate measurement, the specific method comprises the following steps:

the method comprises the following steps that 1, an MCU (microprogrammed control Unit) processor enters a sleep mode, the function of an LED nixie tube display module is turned off, the function of a weighing ADC (analog to digital converter) chip is turned off, a LoRa power control module is controlled to turn off the power supply of the LoRa module, and the MCU processor only keeps the RTC function;

awakening the MCU treater every 1S once, getting into high-speed mode from sleep mode, under this mode, open the ADC chip function of weighing, measure the total weight and the total amount of measured object, and control loRa power control module and open the power of loRa module, wait that the loRa module connects the loRa concentrator, see through serial communication module with the data of measured object, send for the loRa module by the MCU treater, send the loRa concentrator by the loRa module again, forward the server again, after sending and accomplishing, carry out the way of above-mentioned 1 once more.

The utility model can obtain the time of the server, and uses the perpetual calendar timing module as a time reference for automatically measuring the weight after waking up the LoRa module; the product numbers and product weights of up to 400 tested objects can be established in the intelligent weighing pad body through the key input module under the matching control of hardware and software, the product numbers and the product weights can be displayed by the LED nixie tube display module, the visual operation is convenient, and the product numbers and the product weights of the tested objects are stored in the independent storage module EEPROM; the MCU processor detects the change of the weighing sensor through the weighing ADC chip, the weighing operation unit is utilized to obtain the total weight and the total amount of the tested product, and after each operation is completed, the serial port communication module of the MCU processor sends the serial number, the total weight, the total amount and the measurement time of the tested product to the server through the LoRa concentrator in a 4G, WAN mode; after the server receives the data, the power control module of the MCU processor can close the power supply and the LED display module of the LoRa module, and meanwhile, the MCU processor also enters a sleep mode (only the function of perpetual calendar is kept) so as to achieve the purpose of saving electricity integrally.

The LoRa module and the matched LoRa concentrator can realize self-networking after being electrified, local area networking management and data transmission of the LoRa module are realized by taking the LoRa concentrator as a center, and at most 200 LoRa networking is supported; the LoRa module is not directly connected with the server, and the data exchange between the LoRa module and the server is realized by the LoRa concentrator through the 4G, WAN function of the LoRa concentrator.

Claims (8)

1. An intelligent weighing system based on a LoRa module is characterized in that a plurality of groups of LoRa weighing subsystems carry out data transmission with a server through a LoRa concentrator;

wherein, every group LoRa weighing subsystem includes:

the weighing sensor is used for detecting physical deformation generated by a detected object and converting the physical deformation into a voltage signal;

the weighing ADC chip is used for detecting an analog signal of the weighing sensor and converting the analog signal into a digital signal;

the LoRa module is in data transmission with the MCU through a serial port communication module and is in wireless communication with the LoRa concentrator through a LoRa wireless transmission module; the LoRa power module is also provided with a LoRa power module for providing power for the LoRa power module;

the MCU processor is carried with an MCU power module and a LoRa power control module; wherein, MCU power module provides the power for the MCU treater, and loRa power control module connects loRa power module for control loRa module's power supply.

2. The intelligent weighing system based on the LoRa modules as claimed in claim 1, wherein each group of LoRa weighing subsystems further comprises an EEPROM memory module; and the EEPROM storage module is connected with the MCU processor and is used for storing the product number and the monomer weight of the tested object.

3. The intelligent weighing system based on the LoRa modules as claimed in claim 1, wherein each group of LoRa weighing subsystems further comprises an LED nixie tube display module; and the LED nixie tube display module is connected with the output end of the MCU processor.

4. The intelligent weighing system based on the LoRa modules as claimed in claim 1, wherein each group of LoRa weighing subsystems further comprises a key input module; the key input module is connected with the input end of the MCU processor.

5. The intelligent weighing system based on the LoRa module of claim 1, wherein the MCU processor is further loaded with a weighing arithmetic unit and a perpetual calendar timer module.

6. The intelligent weighing system based on the LoRa module of claim 1, wherein the output end of the LoRa module is connected with an indicator light.

7. The intelligent weighing system based on the LoRa module of claim 1, wherein the number of LoRa weighing subsystems is less than or equal to 200 groups.

8. The intelligent weighing system based on the LoRa module of claim 1, wherein the server is a remote cloud platform.

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