Wireless environment parameter monitoring node system based on Bluetooth MESH networking

Abstract

A wireless environment parameter monitoring node system based on Bluetooth MESH networking belongs to the technical field of wireless self-organizing sensor network structures, and comprises a laboratory environment monitoring network formed by a plurality of nodes through a Bluetooth MESH self-organizing network; each node is composed of a digital environment parameter sensor module, an electronic paper display module, a lithium battery module, a power management module, a Bluetooth MESH communication module and a master control module, and the master control module is in bidirectional communication connection with the digital environment parameter sensor module, the electronic paper display module, the power management module and the Bluetooth MESH communication module. The lithium battery module is bidirectionally connected with the power management module, and the power management module is connected with the digital environment parameter sensor module. The laboratory environment monitoring system has the characteristics of low cost, small size, low power consumption and the like, can complete large-area multi-laboratory environment monitoring tasks through multi-node networking, is an effective supplement for existing manual reading and single-machine environment monitoring equipment, and conforms to digital scene application of laboratory management system authentication.

Description

TECHNICAL FIELD

[0001] The utility model belongs to wireless self -organizing sensor network structure technical field, concretely relates to a wireless environmental parameter monitoring node system based on bluetooth MESH networking. BACKGROUND

[0002] The existing technology has the following problems:

[0003] 1.CN117707003A is applied to intelligent machine room environmental monitoring system, is used for monitoring temperature and humidity, smoke, water leakage, adopts raspberry pi microcontroller, contains audible -visual alarm etc. Information is sent to the receiving end through the wireless communication module, is used for activating network service, real -time detection environmental information and carries out early warning.

[0004] 2.CN117571032A wireless temperature and humidity recorder mainly describes the specific structure of the recorder, the main control chip of the main control circuit is CC1310F128RGZ, and the temperature and humidity detection circuit chip is STH30, the temperature and humidity measurement precision is low, is applicable to low temperature environment, the self -contained heating plate consumes power and is not conducive to low power consumption, and the self -organizing network feature is not embodied.

[0005] 3.CN219956597U wireless temperature and humidity recorder based on bluetooth communication mode only focuses on describing application, and data is transmitted to mobile phone using Zigbee protocol.

[0006] 4.CN116400761A wireless temperature and humidity detection control system based on STM32 realizes the wireless transceiver function of data based on nRF24L01P, and displays data in real time through Lab- VIEW host computer interface, and the state is rejected after application publication, the measurement precision of DHT11 temperature and humidity sensor is low, the 24L01 chip is not embodied self -organizing network feature, and low -power consumption feature is not obvious.

[0007] 5.CN219416234U wireless temperature and humidity sensor only describes the composition structure, does not have detailed description of internal function structure, and does not have specific performance parameter explanation.

[0008] 6.CN219204699U wireless temperature and humidity data acquisition transmission device belongs to the field of communication technology, uses 433m wireless module, is applicable to long -distance communication, and does not embody performance parameters, self -organizing network characteristics and low -power consumption characteristics. SUMMARY

[0009] To solve the defects in the prior art, provide a kind of wireless environmental parameter monitoring node system based on bluetooth MESH networking, including multiple nodes through bluetooth MESH self -organizing network composition laboratory environment monitoring network.

[0010] Further, the single node is composed of a digital environment parameter sensor module, an electronic paper display module, a lithium battery module, a power management module, a Bluetooth MESH communication module, and a master control module.

[0011] Further, the digital environment parameter sensor module includes a temperature and humidity sensor, a barometric pressure sensor, an illumination sensor, and a gas concentration sensor.

[0012] Further, the node uses a 1.54-inch, SPI interface, 200*200 resolution electronic paper as a display module.

[0013] Further, the lithium battery module uses a 350mAh battery with a protection board, the module uses a type-C interface as a lithium battery charging interface, the module charging control uses a TP4059 chip, and the module has a charging status indication LED lamp.

[0014] Further, the power management module realizes a one-key on-off function through a PMOS tube AO3401, uses a low-dropout LDO to provide low-noise voltage for the sensor module, and uses power enable control function to complete the on-off control of the power supply of the MEMS type digital gas sensor heating circuit.

[0015] Further, the Bluetooth MESH communication module uses an E104BT11 high-power Mesh Bluetooth module, and uses a finished module to provide a general TTL level serial port for the master control module.

[0016] Further, the master control module uses an STM32L051 low-power single-chip microcomputer, uses a 32.768k crystal as the real-time clock source of the single-chip microcomputer, and uses a 24C64 type EEPROM storage chip connected with the master control module through an IIC interface. When the node is disconnected from the network, the environment parameter measurement data with the measurement time corresponding timestamp are stored in the EEPROM chip. When the node is connected to the network again, the related measurement data are transmitted to the upper end database through the network.

[0017] The utility model discloses beneficial effect is: the utility model discloses in the measurement and verification, calibration, detection etc. a series of activities for obtaining the quantity value, realizing the purpose of traceability type etc., environmental condition is the prerequisite that needs to satisfy, only controlled, reasonable environment can further guarantee the rationality of measurement and detection activity, and the importance of environmental parameters such as temperature and humidity in measurement and detection and measurement standard evaluation is increasingly prominent. In order to improve the laboratory environmental monitoring efficiency, accuracy, real-time, the utility model discloses, monitor laboratory environmental parameters (temperature and humidity, atmospheric pressure, illumination, gas concentration etc. parameter), strengthen laboratory temperature and humidity etc. environmental information collection and management, guarantee the process of verification, calibration, detection etc. is carried out under the controlled environment, further help the detection quality promotion.

[0018] The utility model discloses laboratory environmental monitoring is low in cost, convenient to arrange and use's laboratory environmental detection equipment. The utility model discloses have low cost, small size, low complex design, low power consumption etc. characteristic, and multi -node networking can complete large -area, multiple laboratory environmental monitoring task, is to the effective supplement of present manual reading, single -machine environmental monitoring equipment, is a kind of digital scene application in line with laboratory management system certification. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the system structure diagram of the utility model. DETAILED DESCRIPTION

[0020] The utility model discloses a kind of wireless environmental parameter detection nodes based on Bluetooth MESH self-organizing network (hereinafter referred to as "node"), as shown in Figure 1 Multiple nodes are formed into a perfect laboratory environmental monitoring network by Bluetooth MESH self-organizing network.For a single node, it is composed of digital environmental parameter sensor module (including temperature and humidity, atmospheric pressure, illumination, gas concentration, etc.), electronic paper display module, lithium battery module, power management module, Bluetooth MESH communication module, master control module and external shell containing the above modules.

[0021] The utility model collects temperature and humidity, atmospheric pressure, illumination, etc. (sensor module is selected according to actual demand) in the environment by sensor module;

[0022] The master control module connects the sensor module through digital interface and reads environmental data; the master control module displays measured values through electronic paper module; the master control module transmits data to MESH self-organizing network through Bluetooth MESH communication module, and data is finally transmitted to server through network;

[0023] Lithium battery module supplies power to each module; lithium battery charging and power management module completes lithium battery charging management and power management function.

[0024] The utility model has the characteristics of small size, low cost, simple hardware structure, low power consumption, can provide long time environmental parameter monitoring, satisfies laboratory demand, has certain practicality.

[0025] In order to meet the laboratory environmental detection needs, the conventional environmental monitoring parameters include temperature and humidity, atmospheric pressure and the like, and for special requirement laboratory, illumination, gas concentration and the like parameters are also involved, and meanwhile, some laboratories also have the demand for accurate time display.For the basic environmental parameter detection, the temperature range needs to be satisfied: 15 DEG C ~ 35 DEG C, resolution: 0.01 DEG C, ordinary temperature measurement error: ± 0.50 DEG C, high-precision measurement error: ± 0.20 DEG C, relative humidity measurement range: 10% ~ 100%, measurement error: ± 5% RH, atmospheric pressure measurement range: 900hPa ~ 1100hPa, measurement error: ± 100Pa, timing error: ± 1s.For the illumination, gas concentration and the like parameters involved in special requirement laboratory, the parameters are determined according to the specific requirements.

[0026] In order to realize the requirements of low cost, small size, low complexity design, low power consumption and the like, the utility model adopts digital environmental parameter sensor module (temperature and humidity, atmospheric pressure, illumination, gas concentration and the like sensor) to reduce the hardware complexity, realizes the low power consumption management of the utility model by electronic paper display module, power management module and the like, uses Bluetooth MESH communication module to realize MESH networking and has the strong redundancy characteristic of the centerless self-organizing network, and cooperates with the master control to realize the control function.

[0027] System structure

[0028] The utility model is composed of digital environmental parameter sensor module (including temperature and humidity, atmospheric pressure, illumination, gas concentration and the like parameters), electronic paper display module, lithium battery module, power management module, Bluetooth MESH communication module, master control module and the external shell containing the above-mentioned modules and the like, and the specific structure is as shown in Figure 1 .

[0029] To ensure the compatibility of node hardware, the digital environment parameter sensor module (temperature and humidity, atmospheric pressure, illumination, gas concentration, etc. sensors) uniformly adopts IIC interface, which can ensure the generality of hardware structure and simplify the design. For the temperature and humidity sensor, SHT41 chip is adopted, and a dust cover is configured to realize the performance of temperature resolution 0.01℃, temperature typical error ±0.2℃ and humidity ±1.8%RH in the measurement range of 15℃-35. For the air pressure sensor, BMP388 is adopted to realize the performance of error ±100Pa in the measurement range of 300hPa-1100hPa. For the illumination sensor, BH1750 is adopted to realize the measurement range of (1-65535)Lux, which meets the requirements of conventional illumination monitoring. For the gas concentration sensor, JTD series MEMS type digital gas sensor is adopted to realize the monitoring functions of oxygen, combustible gas, hydrogen sulfide and VOC gas. Thanks to the progress of sensor technology, the utility model can select digital sensors with appropriate functions and precision according to the actual needs of laboratory environment monitoring.

[0030] The node adopts 1.54-inch, SPI interface, 200*200 resolution electronic paper as the display module, and the electronic paper module is light and thin, low power consumption and has display retention characteristics, which is suitable for use in the utility model. The environmental parameters generally have the characteristics of slow change, and in the utility model, the environmental parameters are measured at an interval of 1 minute and updated to the electronic paper module to display the measurement data. In the interval, the node is in a low-power sleep state, and the electronic paper module retains the last measurement data until the measurement data is updated.

[0031] The lithium battery module adopts a 350mAh battery with a protection board, and the module uses a type-C interface as a lithium battery charging interface. The module charging control adopts TP4059 chip, which can complete lithium battery charging within 2 hours, and the module has a charging status indication LED lamp. Combined with the low-power characteristics of the node, the node can work independently for a long time. The power management module realizes the functions of one-key on-off, voltage stabilization, power supply enable control, distributes the lithium battery output voltage to each functional module, realizes energy saving, prolongs the application time of the battery, and automatically sleeps. The one-key on-off function is realized by taking AO3401 (PMOS) as the core, low-dropout LDO is adopted to provide low-noise voltage for the sensor module, and the power supply enable control function is used to complete the on-off control of the power supply of the MEMS type digital gas sensor heating circuit.

[0032] The Bluetooth MESH communication module adopts E104BT11 high-power Mesh Bluetooth module, realizes the MESH network with strong redundancy characteristics, no center and self-organization, can transmit any data in the network, cooperates with the node sleep function, realizes the low power consumption of the utility model. The finished module is adopted, the system design is simplified, the complicated Bluetooth communication protocol is skipped, and a general TTL level serial port is provided for the host module. Because the utility model transmits data more clearly, other wireless communication modules with network function can also be used to realize the function according to the demand.

[0033] The host module adopts STM32L051 type low-power single-chip microcomputer, has the characteristics of ultra-low power consumption, and uses 32.768k crystal as the real-time clock source of the single-chip microcomputer. The utility model has 24C64 type EEPROM storage chip, 24C64 is connected with the host single-chip microcomputer through IIC interface, when the node is separated from the network, the environmental parameter measurement data with measurement time corresponding time stamp is stored in the EEPROM chip, when the node is connected to the network again, the related measurement data is transmitted to the upper end database through the network. The external shell is produced by using 3D printing technology, and the shell accommodates various functional modules.

[0034] In order to realize the low power consumption characteristics of the utility model, the following strategies are adopted. The utility model works in time slice polling mode, sets time as measurement interval, measures devices on both sides, the utility model is in sleep state, only the host module low power consumption clock, timer, external interrupt work, the rest of the functional modules are in sleep or power off state; The sensor adopts low-power device, and sleeps when not in use. For MEMS type digital gas sensor, because it involves heating function, only heating operation is performed when necessary, and the heating function is in power off state at other times; The function of the electronic paper module is low, in order to ensure the low power consumption and service life demand, the electronic paper module is refreshed only when necessary, and is in sleep state at other times; The Bluetooth MESH communication module adopts two methods to reduce power consumption, one is to reduce the transmission power as much as possible under the premise of meeting the communication quality, and the other is to use low power consumption mode and start only when necessary.

[0035] The node power supply is turned on, the node is placed in a suitable position of the monitored laboratory, and the node networking is successful. The node measures environmental parameters (temperature and humidity, atmospheric pressure, illumination, gas concentration and other parameters) at a set time interval, and uploads to the server database through the network. The server analyzes whether the actual environmental parameters of the laboratory meet the management requirements according to the node upload data. The server can also push the Beijing time information from the time frequency center to each node, and the node displays the corresponding Beijing time.

[0036] The above merely is the preferred implementation manner of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1.A wireless environmental parameter monitoring node system based on Bluetooth MESH networking, characterized in that, The laboratory environment monitoring network is composed of multiple nodes through a Bluetooth MESH self-organizing network; The single node is composed of a digital environment parameter sensor module, an electronic paper display module, a lithium battery module, a power management module, a Bluetooth MESH communication module and a master control module; the master control module is in bidirectional communication connection with the digital environment parameter sensor module, the electronic paper display module, the power management module and the Bluetooth MESH communication module; the lithium battery module is in bidirectional connection with the power management module; and the power management module is connected with the digital environment parameter sensor module. 2.The wireless environmental parameter monitoring node system based on Bluetooth MESH networking according to claim 1, wherein, The digital environment parameter sensor module comprises a temperature and humidity sensor, an air pressure sensor, an illumination sensor and a gas concentration sensor. 3.The wireless environmental parameter monitoring node system based on Bluetooth MESH networking according to claim 1, wherein, The node adopts 1.54-inch electronic paper with an SPI interface and a 200*200 resolution as a display module. 4.The wireless environmental parameter monitoring node system based on Bluetooth MESH networking according to claim 1, wherein, The lithium battery module adopts a 350mAh battery with a protection plate; a type-C interface is used as a lithium battery charging interface; a TP4059 chip is used for module charging control; and the module is provided with a charging state indicating LED lamp. 5.The wireless environmental parameter monitoring node system based on Bluetooth MESH networking according to claim 1, wherein, The power management module realizes a one-key on-off function through a PMOS tube AO3401, provides low-noise voltage for the sensor module through a low-dropout LDO, and completes the on-off control of the power supply of the MEMS type digital gas sensor heating circuit through the power supply enable control function. 6.The wireless environmental parameter monitoring node system based on Bluetooth MESH networking according to claim 1, wherein, The Bluetooth MESH communication module adopts an E104BT11 high-power Mesh Bluetooth module, and uses a finished module to provide a general TTL level serial port for the master control module. 7.The wireless environmental parameter monitoring node system based on Bluetooth MESH networking according to claim 1, wherein, The master control module adopts an STM32L051 low-power single-chip microcomputer, uses a 32.768k crystal as a single-chip microcomputer real-time clock source, and connects a 24C64 type EEPROM storage chip with the master control module through an IIC interface; when the node is separated from the network, the environment parameter measurement data with a measurement time corresponding time stamp are stored into the EEPROM chip; when the node is connected to the network again, the related measurement data are transmitted to the upper end database through the network.

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