Zigbee factory environment data acquisition device

Abstract

The utility model discloses a Zigbee factory environment data acquisition device. According to the utility model, the metal shielding cover is fixed on the ground plane of the main control board by being close to multiple welding spots of the main control board, and a low-impedance discharge path is provided for interference current, so that an internal signal line is protected from interference, and the integrity of signal transmission and the communication quality are ensured. The first main control board fixing frame and the second main control board fixing frame in the base are matched with the main control board, it is ensured that the main control board is stably installed in the base, environmental vibration and external impact are effectively resisted, and poor electrical connection or component damage caused by physical displacement is prevented. In order to improve the distance and reliability of Zigbee wireless communication, an external antenna scheme is adopted, a standard SMA interface provides great flexibility, and a user is allowed to select and match antennas with different gain values and different physical forms according to specific installation site environment and communication distance requirements so as to realize the optimal communication performance and ensure that data acquisition information can be reliably transmitted back.

Description

Technical Field

[0001] This utility model belongs to the field of Internet of Things (IoT) technology and relates to a Zigbee factory environment data acquisition device. Background Technology

[0002] In industrial production, it is necessary to collect factory environmental data in order to ensure production quality, optimize production energy efficiency, and test the safety or comfort of the production environment.

[0003] The diverse needs of factory environmental monitoring, coupled with the varied forms of existing data acquisition devices, mean that common factory environmental data acquisition devices rely on pre-installed cable systems. If communication lines or installation locations are not reserved during the initial construction phase of a factory, the later installation of acquisition devices will face risks such as difficult wiring, long construction periods, and disruption to existing production, severely impacting deployment efficiency and system scalability.

[0004] To address the aforementioned cabling challenges, wireless data acquisition devices have seen rapid development in recent years as a flexible deployment solution. Their advantages include the elimination of communication cables, rapid deployment, support for mobile installation, and better scalability and flexibility. Currently, mainstream wireless data acquisition devices widely support various wireless communication protocols (such as Wi-Fi, LoRa, NB-IoT, etc.), and feature low-power design, built-in edge computing capabilities, and remote configuration and diagnostic functions.

[0005] However, when deployed in complex industrial electromagnetic environments, wireless data acquisition devices often face problems such as electromagnetic interference, abnormal software operation, and physical environment challenges, leading to unstable data acquisition, communication interruption, or even equipment downtime, which affects the overall reliability of the system and the validity of the data.

[0006] Frequent fluctuations in factory environmental parameters can lead to equipment instability or product quality instability if key parameters cannot be monitored and dynamically responded to in real time. Therefore, a device capable of wirelessly acquiring factory environmental data and shielding against electromagnetic interference during the acquisition process is proposed to ensure reliable data transmission. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and provide a Zigbee factory environmental data acquisition device.

[0008] This utility model includes an antenna, a base, a first main control board fixing frame, a main control board, a second main control board fixing frame, a top cover, and an external sensor. The first main control board fixing frame is fixed inside the base, and the first main control board fixing frame matches the bottom surface of the main control board. The main control board is fixed to the first main control board fixing frame, thereby fixing it inside the base. A second main control board fixing frame, matching the top surface of the main control board, is fixed above the main control board. The cooperation of the first and second main control board fixing frames secures the main control board inside the base. A top cover is provided above the base and fixed to the top of the base. A standard SMA RF connector interface for mounting the antenna is provided on the side wall of the base. The antenna and the antenna port of the Zigbee module on the main control board are electrically connected to this SMA interface through an IPEX to SMA coaxial RF adapter cable. The sensor is mounted on the side of the base and is connected to the base via a shielded cable. 2 C communication interface and the use of I set on the main control board 2 The C communication interface is electrically connected. The main control board collects data from the sensors and sends it to the host computer via the Zigbee communication module. Metal shielding covers are installed on the main control module (MCU) and the power module.

[0009] Furthermore, the sensor is not limited to one or more of the following: a light sensor, a temperature and humidity sensor, an ultraviolet sensor, or a gas detection sensor.

[0010] Furthermore, the shielded cable uses a braided metal mesh or metal foil as the shielding layer.

[0011] Furthermore, the base, the first main control board fixing frame, the second main control board fixing frame, and the top cover are made of high-strength, impact-resistant engineering plastic ABS, which has the characteristics of impact resistance, high temperature resistance, and chemical corrosion resistance.

[0012] Furthermore, the main control board is equipped with an MCU main control module, a battery, LED indicators, a Zigbee module, buttons, and a power module. The battery, LED indicators, Zigbee module, and buttons are electrically connected to the MCU main control module. The battery powers the other components, and the power module converts the battery voltage to a suitable voltage to provide a stable voltage for the corresponding components. The Zigbee module transmits data collected from the sensors to the host computer. Different LED indicators, based on their color and flashing frequency, indicate different Zigbee operating states. The buttons include switches and related electronic circuitry, used to receive user input signals, detect the button's state (pressed or unpressed) mechanically or electronically, and convert these signals into electrical signals that are transmitted to the main control module. When a button is pressed, the circuit's voltage level changes, triggering the corresponding operation or function.

[0013] Furthermore, the metal shielding cover is fixed to the ground plane of the main control board by multi-point welding.

[0014] Furthermore, the metal shielding cover is made of a highly conductive metal material and manufactured using an integral molding technology.

[0015] Furthermore, a Zigbee module with an integrated shielding cover was selected.

[0016] Furthermore, the MCU main control module uses STMicroelectronics STM32F103RBT6 chip, the Zigbee module uses Ebyte E18-MS1PA2-IPX module, the power module uses Mingda Microelectronics MD7602R33 chip, and the battery uses 18650 lithium battery.

[0017] This invention provides a low-impedance discharge path for interference currents by fixing a metal shielding cover to the ground plane of the main control board near multiple solder points, thereby protecting internal signal lines from interference and ensuring the integrity of signal transmission and communication quality. The first and second main control board fixing frames within the base fit snugly against the main control board, ensuring its stable installation and effectively resisting environmental vibrations and external impacts, preventing electrical connection problems or component damage due to physical displacement. To improve the distance and reliability of Zigbee wireless communication, an external antenna solution is adopted. The standard SMA interface provides great flexibility, allowing users to select antennas with different gain values ​​and physical forms (such as common rod antennas, suction cup antennas with extension cables, etc.) according to the specific installation environment (such as signal strength, obstacles, installation space) and communication distance requirements to achieve optimal communication performance and ensure reliable data transmission. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the device described in this utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the main control board;

[0020] Figure 3 This is a schematic diagram showing the metal shielding cover and the main control board ground plane being fixed by multi-point welding in the embodiment;

[0021] Figure 4 This is a schematic diagram showing the sensor installation location. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1As shown, a Zigbee factory environmental data acquisition device includes an antenna 1, a base 2, a first main control board mounting frame 3, a main control board 4, a second main control board mounting frame 5, a top cover 6, and external sensors (such as...). Figure 4 As shown); the first main control board fixing frame 3 is fixed in the base with screws, and the first main control board fixing frame 3 matches the bottom surface of the main control board 4. The main control board 4 is fixed to the first main control board fixing frame 3 with screws, thus fixing it in the base; a second main control board fixing frame 5 that matches the top surface of the main control board is fixed on the top of the main control board 4 with screws. With the cooperation of the first main control board fixing frame 3 and the second main control board fixing frame 5, the main control board is firmly fixed in the base; a top cover 6 is provided on the top of the base, and the top cover 6 is fixed to the top of the base with screws. A standard SMA (SubMiniature version A) RF connector interface 7 for mounting antenna 1 is provided on the side wall of the base. Antenna 1 and the antenna port of the Zigbee module on the main control board 4 are electrically connected to the SMA interface through an IPEX to SMA coaxial RF adapter cable;

[0024] like Figure 4 As shown, the main control board is equipped with an I... 2 The 4-pin C-type communication interface 9, sensor 10, is connected to I via a shielded 4-core cable 11. 2 C. Communication interface 9 connects to the main control board.

[0025] To ensure the sensor has sufficient contact with the external environment, sensor 10 is mounted on the side wall of the base. A cable approximately 10 cm long is required to connect the sensor and the main control board. The main control board collects data from the sensor and transmits it to the host computer via the Zigbee communication module.

[0026] Sensor 10 can be one or more of the following, but not limited to: a light sensor, a temperature and humidity sensor, an ultraviolet sensor, or a gas detection sensor. The sensor needs to be installed independently of the main control board and connected via cable. The cable connecting the sensor to the main control board, especially for long-distance transmission, is prone to picking up electromagnetic noise in the environment, much like an antenna. This noise can superimpose on weak sensor signals or digital communication signals, leading to increased measurement errors or communication failures. Therefore, the connecting cable should be shielded, for example, using a braided metal mesh or metal foil as a shielding layer, to effectively absorb and reflect external electromagnetic interference.

[0027] In this embodiment, the base 2, the first main control board fixing frame 3, the second main control board fixing frame 5, and the top cover 6 are made of high-strength, impact-resistant engineering plastic (ABS), which has the characteristics of impact resistance, high temperature resistance, and chemical corrosion resistance, in order to adapt to the actual industrial use environment.

[0028] like Figure 2As shown, the main control board 4 is equipped with an MCU main control module 4-1, a battery 4-2, LED indicators 4-3, a Zigbee module 4-4, buttons 4-5, and a power module 4-6. The battery 4-2, LED indicators 4-3, Zigbee module 4-4, and buttons 4-5 are electrically connected to the MCU main control module 4-1. The battery 4-2 powers the remaining components. The power module 4-6 converts the battery voltage to a suitable voltage to provide a stable voltage for the corresponding components. Different colors and flashing frequencies of the LED indicators indicate different Zigbee operating states. The buttons, including switches and related electronic circuitry, receive user input signals, detect the button's state (pressed or unpressed) mechanically or electronically, and convert these signals into electrical signals that are transmitted to the main control module. When a button is pressed, the circuit's voltage level changes, triggering the corresponding operation or function.

[0029] To prevent electromagnetic interference from external environments on sensitive circuits in the MCU main control module and power supply module, metal shielding covers 8 are installed on the MCU main control module and power supply module. The metal shielding covers are fixed to the main control board's ground plane (GND) through multi-point soldering (e.g., ...). Figure 3 As shown, reducing connection impedance ensures reliable grounding and forms an effective grounding loop, so as to guide the absorbed or induced interference current into the ground plane, thereby achieving the best shielding effect.

[0030] The metal shielding cover is made of a highly conductive metal material (aluminum alloy is used in this embodiment). To ensure that its structure is as intact as possible and to reduce gaps, the metal shielding cover is manufactured using a one-piece molding technology.

[0031] Meanwhile, to reduce the interference of electromagnetic radiation generated by the Zigbee module on sensitive circuits in the MCU main control module, a Zigbee module with an integrated shielding cover was selected. The shielding cover can effectively block high-frequency electromagnetic wave interference and reduce the impact of electromagnetic waves in the external environment on the Zigbee module.

[0032] In this embodiment, the MCU main control module uses STMicroelectronics STM32F103RBT6 chip, the Zigbee module uses Ebyte E18-MS1PA2-IPX module, the power module uses Mingda Microelectronics MD7602R33 chip, and the battery uses 18650 lithium battery.

[0033] Employing highly integrated Zigbee communication modules (such as the Ebyte E18-MS1PA2-IPX), which integrate a complete Zigbee protocol stack (compliant with the IEEE 802.15.4 standard), eliminates the need for additional protocol stack porting or maintenance, significantly reducing system development complexity and error probability. The Zigbee protocol boasts excellent networking capabilities, supporting star, tree, and mesh topologies; it also exhibits strong anti-interference capabilities, employing DSSS (Direct Sequence Spread Spectrum) technology to effectively combat interference from Wi-Fi, Bluetooth, and other devices operating in the same frequency band.

[0034] The work process is as follows:

[0035] This Zigbee wireless data acquisition device uses an MCU as its core control unit and has environmental parameter acquisition and wireless communication capabilities. The system connects via I... 2 The C-type bus interface connects to the sensor to periodically collect environmental data such as temperature, humidity, and gas concentration. After the collected data is converted and encapsulated according to the protocol, the MCU sends the data to the Zigbee module via the UART serial port. The Zigbee module packages the data and transmits it wirelessly to the host computer or gateway, completing a full data acquisition process.

[0036] Finally, it should be emphasized that the above description represents only the author's optimal design scheme for this utility model and is not intended to limit the utility model. Those skilled in the art can make improvements and enhancements without departing from the design principles of this utility model, and such modifications should be included within the protection scope of this utility model.

Claims

1. A Zigbee factory environmental data acquisition device, characterized in that: It includes an antenna, a base, a first main control board mounting frame, a main control board, a second main control board mounting frame, a top cover, and an external sensor; the first main control board mounting frame is fixed inside the base, the first main control board mounting frame matches the bottom surface of the main control board, and the main control board is fixed to the first main control board mounting frame, thereby fixing it inside the base; A second main control board mounting frame, which matches the top surface of the main control board, is fixed above the main control board. The main control board is securely fixed in the base with the cooperation of the first and second main control board mounting frames. A top cover is provided on the top of the base and is fixed to the top of the base. A standard SMA RF connector interface for installing an antenna is provided on the side wall of the base. The antenna and the antenna port of the Zigbee module on the main control board are electrically connected to the SMA RF connector interface through an IPEX to SMA coaxial RF adapter cable. The sensor is mounted on the side of the base and connected via a shielded cable through I... 2 C communication interface and the use of I set on the main control board 2 The C communication interface is electrically connected; the main control board collects data from the sensor and sends it to the host computer through the Zigbee communication module; metal shielding covers are set on the MCU main control module and power supply module.

2. The Zigbee factory environmental data acquisition device as described in claim 1, characterized in that: The sensor is one or more of the following, not limited to, a light sensor, a temperature and humidity sensor, an ultraviolet sensor, or a gas detection sensor.

3. The Zigbee factory environmental data acquisition device as described in claim 1, characterized in that: The shielded cable uses braided metal mesh or metal foil as the shielding layer.

4. The Zigbee factory environmental data acquisition device as described in claim 1, characterized in that: The base, the first main control board fixing frame, the second main control board fixing frame and the top cover are made of high-strength, impact-resistant engineering plastic ABS, which has the characteristics of impact resistance, high temperature resistance and chemical corrosion resistance.

5. A Zigbee factory environmental data acquisition device as described in claim 1, characterized in that: The main control board is equipped with an MCU main control module, a battery, LED indicators, a Zigbee module, buttons, and a power module. The battery, LED indicators, Zigbee module, and buttons are electrically connected to the MCU main control module. The battery powers the other components. The power module converts the battery voltage to a suitable voltage to provide a stable voltage for the corresponding components. The Zigbee module sends data collected from the sensors to the host computer. The different colors and flashing frequencies of the LED indicators show different Zigbee operating states. The buttons receive user input signals, and the button status is detected mechanically or electronically, converting these signals into electrical signals and transmitting them to the main control module. When a button is pressed, the circuit's voltage level changes, triggering the corresponding operation or function.

6. The Zigbee factory environmental data acquisition device as described in claim 1, characterized in that: The metal shielding cover is fixed to the ground plane of the main control board by multi-point welding.

7. A Zigbee factory environmental data acquisition device as described in claim 1 or 6, characterized in that: The metal shielding cover is made of a highly conductive metal material and manufactured using a one-piece molding technology.

8. A Zigbee factory environmental data acquisition device as described in claim 1, characterized in that: A Zigbee module with an integrated shielding cover was selected.

9. A Zigbee factory environmental data acquisition device as described in claim 1, characterized in that: The MCU main control module uses STMicroelectronics STM32F103RBT6 chip, the Zigbee module uses Ebyte E18-MS1PA2-IPX module, the power module uses Mingda Microelectronics MD7602R33 chip, and the battery uses 18650 lithium battery.

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