A kind of peripheral drive thickener rake frame pressure data wireless transmission device

Abstract

This utility model relates to the field of thickener monitoring technology in the mining and metallurgical industries, and specifically discloses a wireless transmission device for pressure data of the rake frame in a peripheral drive thickener. The device includes a pressure sensing conversion module, a signal processing unit, a wireless transmission module, a power supply unit, and a receiving terminal. The pressure sensing conversion module is installed on the rake frame and is used to collect rake frame torque data in real time. The signal processing unit is connected to the pressure sensing conversion module and includes an AD conversion circuit and a microcontroller for filtering and digitally processing the collected sensor signals. The wireless transmission module is connected to the signal processing unit and uses a LoRa spread spectrum communication chip with a working frequency of 433MHz and a transmission distance of ≥500m for wireless transmission of the processed signal. This device achieves low-power, high-interference, long-distance, and reliable real-time wireless transmission of rake frame pressure data, ensuring the safe and stable operation of the thickener and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of thickener monitoring technology in the mining and metallurgical industries, and in particular to a wireless transmission device for pressure data of the rake frame of a peripheral drive thickener. Background Technology

[0002] Thickeners are important equipment in solid-liquid separation processes, serving functions of concentration, washing, and buffering. They are widely used in mineral processing, chemical industry, coal washing, and wastewater treatment. Thickeners can concentrate slurry with a solid content of 10% to 20% to underflow slurry with a solid content of 45% to 55% through gravity settling. The rake arm rotates slowly to discharge the underflow slurry from the underflow outlet, while the clarified liquid overflows from the top.

[0003] In existing technologies, there are many pain points in monitoring the pressure of the rake frame in a peripheral drive thickener: 1. The rake frame is a rotating component. Traditional wired transmission requires wiring via slip rings or drag chains, and long-term rotation can easily lead to cable wear and breakage. 2. Slip ring contact transmission is susceptible to dust and humid environments, with a data packet loss rate as high as 15% to 20%, resulting in distorted pressure data and an inability to accurately warn of the risk of rake frame overload; 3. Wired transmission relies on a local control cabinet and cannot achieve remote real-time monitoring; 4. Traditional WiFi / Bluetooth modules have a standby power consumption of >10mW, requiring frequent battery replacements and are not suitable for long-term field monitoring; moreover, the 2.4GHz band is susceptible to electromagnetic interference from industrial equipment, with a transmission distance of <200m, which cannot meet the signal coverage requirements of large-scale dense cameras with a diameter of >50m. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a wireless transmission device for pressure data of a peripheral drive thickener rake frame, which solves the technical problems of high wiring and maintenance costs, low signal reliability, and insufficient real-time monitoring in existing technologies.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A peripheral drive thickener rake frame pressure data wireless transmission device includes a pressure sensing conversion module, a signal processing unit, a wireless transmission module, a power supply unit, and a receiving terminal. The pressure sensing conversion module is installed on the rake frame and is used to collect rake frame torque data in real time; The signal processing unit is connected to the pressure sensing conversion module and includes an AD conversion circuit and a microcontroller, used to filter and digitally process the acquired sensor signals. The wireless transmission module is connected to the signal processing unit, uses a LoRa spread spectrum communication chip, operates at a frequency of 433MHz, and has a transmission distance of ≥500m, and is used to wirelessly transmit the processed signal. The power supply unit provides power to the pressure sensing conversion module, the signal processing unit, and the wireless transmission module. The receiving terminal includes a LoRa receiver, an industrial gateway, and a host computer display system. The LoRa receiver is used to receive signals sent by the wireless transmission module, the industrial gateway is used to parse the signals and upload them, and the host computer display system is used to display the data. This solves the problems of weak anti-interference and insufficient coverage, and ensures the reliability and real-time performance of data transmission.

[0006] Preferably, the pressure sensing conversion module adopts two sets of redundant sensing data conversion modules, which are strain gauge type, thus improving the reliability of pressure data acquisition.

[0007] Preferably, the wireless transmission module adopts the TDMA (Time Division Multiple Access) protocol to avoid channel conflicts, reduce data transmission interference, and ensure the orderliness and stability of wireless signal transmission.

[0008] Preferably, the pressure sensing conversion module uses a multiplexed loop for sensing data conversion to improve reliability and reduce the risk of data loss due to single loop failure.

[0009] Preferably, the device housing has an IP67 protection rating and a built-in magnetic mounting structure, which simplifies the installation process.

[0010] Preferably, the AD conversion circuit of the signal processing unit includes an ADS1115 analog-to-digital converter and an STM32 series microcontroller, which improves the accuracy and efficiency of data processing.

[0011] Preferably, the host computer display system can draw pressure curves in real time, and when the pressure exceeds a preset threshold, it can issue a red warning; when it exceeds an overload threshold, it can trigger an audible and visual alarm and shut down for protection.

[0012] Preferably, the LoRa spread spectrum communication chip is SX1278, which improves the accuracy and efficiency of data processing.

[0013] Compared with the prior art, the present invention has the following beneficial effects: By adopting LoRa wireless transmission technology, redundant sensing design, low power consumption scheme and IP67 protection, the problem of high wiring maintenance cost, low signal reliability and insufficient real-time monitoring in the existing peripheral drive thickener rake frame pressure monitoring is effectively solved. It realizes low power consumption, strong anti-interference, long distance and reliable real-time wireless transmission of rake frame pressure data, ensuring the safe and stable operation of the thickener and reducing operation and maintenance costs. Attached Figure Description

[0014] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0015] Figure 1 This is a system structure block diagram of the present invention; Figure 2 This is a schematic diagram of the installation of this utility model. Detailed Implementation

[0016] This application provides a wireless transmission device for rake frame pressure data of a peripheral drive thickener, which effectively solves the problems of high wiring and maintenance costs, low signal reliability, and insufficient real-time monitoring in the prior art. The device achieves low power consumption, strong anti-interference, long distance, and reliable real-time wireless transmission of rake frame pressure data, ensuring the safe and stable operation of the thickener and reducing operation and maintenance costs. Example

[0017] like Figure 1 and Figure 2 As shown, the technical solution in this application embodiment effectively solves the technical problems of high wiring maintenance cost, low signal reliability and insufficient real-time monitoring in the prior art. The overall idea is as follows: A peripheral drive thickener rake frame pressure data wireless transmission device includes a pressure sensing conversion module, a signal processing unit, a wireless transmission module, a power supply unit and a receiving terminal. The pressure sensing conversion module is installed on the rake frame and is used to collect rake frame torque data in real time; The signal processing unit is connected to the pressure sensing conversion module and includes an AD conversion circuit and a microcontroller, used to filter and digitally process the acquired sensor signals. The wireless transmission module is connected to the signal processing unit, uses a LoRa spread spectrum communication chip, operates at a frequency of 433MHz, and has a transmission distance of ≥500m, and is used to wirelessly transmit the processed signal. The power supply unit provides power to the pressure sensing conversion module, the signal processing unit, and the wireless transmission module. The receiving terminal includes a LoRa receiver, an industrial gateway, and a host computer display system. The LoRa receiver is used to receive signals sent by the wireless transmission module, the industrial gateway is used to parse the signals and upload them, and the host computer display system is used to display the data. Through the collaborative work of these modules, this part realizes real-time wireless transmission of rake frame pressure data, avoiding the problems of wiring wear and high maintenance costs associated with traditional wired transmission. The 433MHz frequency band and long-distance characteristics of LoRa technology solve the pain points of weak anti-interference and insufficient coverage, ensuring the reliability and real-time performance of data transmission.

[0018] The pressure sensing conversion module adopts two sets of redundant sensing data conversion modules, which are strain gauge type. The two sets of redundant design and strain gauge structure improve the reliability of pressure data acquisition. In the event of a failure of the main sensor, the redundant sensors can ensure uninterrupted data acquisition. The strain gauge type can accurately capture changes in the torque of the rake frame.

[0019] The wireless transmission module adopts the TDMA (Time Division Multiple Access) protocol to avoid channel conflicts. The TDMA protocol avoids channel conflicts between multiple nodes through time-division transmission, reduces data transmission interference, and ensures the orderliness and stability of wireless signal transmission.

[0020] The pressure sensing conversion module uses a multiplexed loop for sensing data conversion to improve reliability. The multiplexed loop design further enhances the fault resistance of sensing data conversion, reduces the risk of data loss due to single loop failure, and improves the overall operational reliability of the device.

[0021] The device's outer casing has an IP67 protection rating and a built-in magnetic mounting structure. The IP67 protection rating allows the device to adapt to harsh environments such as dust and humidity in the mining and metallurgical industries, while the magnetic mounting structure facilitates quick fixation on the rotating rake frame, simplifying the installation process.

[0022] The AD conversion circuit of the signal processing unit includes an ADS1115 analog-to-digital converter and an STM32 series microcontroller. The ADS1115 analog-to-digital converter ensures high-precision conversion of analog signals to digital signals, while the STM32 series microcontroller efficiently completes signal filtering and digital processing, improving the accuracy and efficiency of data processing.

[0023] The host computer display system can draw pressure curves in real time, and when the pressure exceeds the preset threshold, it can issue a red warning. When the overload threshold is exceeded, it can trigger an audible and visual alarm and shut down the machine for protection. The real-time curve drawing realizes the visual monitoring of pressure data. The threshold warning and shutdown protection functions can detect the risk of rake frame overload in time, avoid serious failures such as rake frame jamming caused by overload, and reduce economic losses.

[0024] The LoRa spread spectrum communication chip is SX1278, which ensures low power consumption, strong anti-interference and long-distance performance of ≥500m for wireless transmission, adapts to the signal coverage requirements of large-scale dense machines, and ensures stable data transmission.

[0025] To address the problems existing in the prior art, this utility model provides a wireless transmission device for rake frame pressure data of a peripheral drive thickener. This device achieves low power consumption, strong anti-interference, long distance and reliable real-time wireless transmission of rake frame pressure data, ensuring the safe and stable operation of the thickener and reducing maintenance costs.

[0026] Working principle: The first step is to install the pressure sensor conversion module on the thickener rake frame to collect the rake frame torque data in real time. Two sets of redundant sensor data conversion modules and multiplexing circuits are used. When the main sensor is abnormal, the system switches to the redundant channel through a fault detection mechanism to ensure the reliability of data acquisition. The second step involves transmitting the acquired analog signal to the signal processing unit: first, it is converted into a digital signal by an AD conversion circuit, and then filtered, digitally processed, and compressed by the microcontroller to improve signal quality and transmission efficiency. The third step involves transmitting the processed digital signal via the LoRa wireless transmission module. The module employs the TDMA (Time Division Multiple Access) protocol, avoids channel conflicts according to preset time slots, ensures a transmission distance of ≥500m, and has strong anti-interference capabilities. The fourth step is to provide power to the pressure sensing conversion module, signal processing unit and wireless transmission module to ensure the long-term stable operation of the device. The fifth step involves the LoRa receiver of the receiving terminal receiving the wireless signal, which is then parsed by the industrial gateway and uploaded to the factory's DCS system via the TCP / IP protocol. The host computer display system draws the pressure curve in real time and implements threshold warning: when the pressure is >400kN, it triggers an audible and visual alarm and shutdown protection.

[0027] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A device for wireless transmission of pressure data from a peripheral drive thickener rake support, characterized in that, It includes a pressure sensing conversion module, a signal processing unit, a wireless transmission module, a power supply unit, and a receiving terminal; The pressure sensing conversion module is installed on the rake frame and is used to collect rake frame torque data in real time; The signal processing unit is connected to the pressure sensing conversion module and includes an AD conversion circuit and a microcontroller, used to filter and digitally process the acquired sensor signals. The wireless transmission module is connected to the signal processing unit, uses a LoRa spread spectrum communication chip, operates at a frequency of 433MHz, and has a transmission distance of ≥500m, and is used to wirelessly transmit the processed signal. The power supply unit provides power to the pressure sensing conversion module, the signal processing unit, and the wireless transmission module. The receiving terminal includes a LoRa receiver, an industrial gateway, and a host computer display system. The LoRa receiver is used to receive signals sent by the wireless transmission module, the industrial gateway is used to parse the signals and upload them, and the host computer display system is used to display the data.

2. The peripheral drive thickener rake frame pressure data wireless transmission device as described in claim 1, characterized in that, The pressure sensing conversion module uses two sets of redundant sensing data conversion modules, which are strain gauge type.

3. The peripheral drive thickener rake frame pressure data wireless transmission device as described in claim 1, characterized in that, The wireless transmission module uses the TDMA (Time Division Multiple Access) protocol to avoid channel conflicts.

4. The peripheral drive thickener rake frame pressure data wireless transmission device as described in claim 1, characterized in that, The pressure sensing conversion module uses a multiplexed loop for sensing data conversion to improve reliability.

5. The peripheral drive thickener rake frame pressure data wireless transmission device as described in claim 1, characterized in that, The device housing has an IP67 protection rating and a built-in magnetic mounting structure.

6. The peripheral drive thickener rake frame pressure data wireless transmission device as described in claim 1, characterized in that, The signal processing unit's AD conversion circuit includes an ADS1115 analog-to-digital converter, and the microcontroller is an STM32 series.

7. The peripheral drive thickener rake frame pressure data wireless transmission device as described in claim 1, characterized in that, The host computer display system can draw pressure curves in real time, and when the pressure exceeds the preset threshold, it can issue a red warning. When the pressure exceeds the overload threshold, it can trigger an audible and visual alarm and shut down the machine for protection.

8. The peripheral drive thickener rake frame pressure data wireless transmission device as described in claim 1, characterized in that, The LoRa spread spectrum communication chip is SX1278.

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