Wireless passive multi-parameter sensing monitoring system suitable for rotor bearing

Abstract

The invention relates to the technical field of online testing, in particular to a wireless passive multi-parameter sensing monitoring system suitable for a rotor bearing, which comprises a multi-physical parameter acquisition module, a power supply module, different parameter conditioning circuit boards adopting hierarchical design, a central processing module with an MCU (Microprogrammed Control Unit) chip, a wireless communication module and an upper computer, analog signals of physical parameters acquired by the multi-physical-parameter acquisition module are processed into digital signals through different parameter conditioning circuit boards which are designed in a layered mode, the digital signals are transmitted into the central processing module with the MCU chip, then the digital signals are converted into electromagnetic waves through the wireless communication module and thrown into the environment, and after an upper computer receives the electromagnetic waves, the wireless communication module transmits the electromagnetic waves to the central processing module. And processing the data into required monitoring data. The problem that the running state of the rotor bearing of the small turbojet engine is difficult to monitor in real time can be effectively solved, multiple physical parameters in the running state of the rotor bearing can be effectively monitored, and new equipment and a new method are provided for monitoring requirements when the rotor bearing works.

Description

Technical Field

[0001] This invention relates to the field of online testing technology, and specifically to a wireless passive multi-parameter sensing and monitoring system suitable for rotor bearings. Background Technology

[0002] In the current real-time monitoring of the operating status of rotor bearings in small turbojet engines, there are challenges such as long signal transmission paths, high background noise, and difficulty in achieving effective data monitoring. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention proposes a wireless passive multi-parameter sensing and monitoring system suitable for rotor bearings based on the theory of lightweight and integrated sensor design. This system reduces the interference of sensors on the rotor bearing structure, develops a sensing signal transmission link scheme with strong anti-interference characteristics, and realizes stable wireless transmission and reception of sensing signals from the measuring end to the collecting end.

[0004] To achieve the above objectives, the technical solution specifically adopted by the present invention is as follows: A wireless passive multi-parameter sensing and monitoring system for rotor bearings includes a multi-physical parameter acquisition module, a power supply module, different parameter conditioning circuit boards with a layered design, a central processing module with an MCU chip, a wireless communication module, and a host computer. The analog signals of the physical parameters acquired by the multi-physical parameter acquisition module are processed into digital signals by the different parameter conditioning circuit boards with a layered design, and then transmitted to the central processing module with an MCU chip. The signals are then converted into electromagnetic waves by the wireless communication module and emitted into the environment. The host computer receives the electromagnetic waves and processes them into the required monitoring data.

[0005] Furthermore, the power supply module uses a photovoltaic panel as an energy receiving device and is equipped with a voltage regulator and rectifier circuit. The photovoltaic panel is installed at the end of the monitoring system and uses an external light source to obtain energy.

[0006] Furthermore, the layered design of the different parameter conditioning circuit boards provides separate conditioning circuit boards for analog signals with different physical parameters to avoid signal crosstalk, and each conditioning circuit board is equipped with a digital-to-analog converter chip with temperature compensation function.

[0007] Furthermore, the wireless communication module selects different frequency communication channels based on the electromagnetic design within the engine environment to achieve effective data transmission, and includes an internal radio frequency antenna.

[0008] Furthermore, the physical parameters include, but are not limited to, temperature data acquired using thermocouple sensors, stress data acquired using MEMS stress sheets, strain data acquired using fiber optic grating sensors, and vibration data acquired using piezoelectric acceleration.

[0009] Furthermore, the monitoring process includes the following steps: S1. Install the monitoring system on the shaft system where the rotor bearing is located, and let it rotate together with the shaft system; S2. Analog signals with multiple physical parameters are processed into digital signals by different parameter conditioning circuit boards with layered design; S3. The digital signal is transmitted to the central processing module, and then converted into electromagnetic waves by the wireless communication module and emitted into the environment. S4. After receiving the electromagnetic waves, the host computer processes them into the required monitoring data.

[0010] Furthermore, throughout the entire process, the monitoring system is powered by a power supply module that uses photovoltaic panels as energy receiving devices.

[0011] The power supply module using photovoltaic panels as energy receiving devices in this invention avoids the risk of battery explosion in the high-temperature environment of a small turbojet engine. Compared with monitoring systems using electromagnetic induction power supply, it avoids crosstalk coupling of the electromagnetic environment to analog signals, thus improving the system's monitoring accuracy.

[0012] The layered design of the different parameter conditioning circuit boards used in this invention avoids crosstalk coupling between analog signals from different parameter sensors on the same circuit board, thus improving testing accuracy. Furthermore, it effectively utilizes the internal space of the sensing and monitoring system, reducing the system's size and meeting the design requirements for lightweight sensors.

[0013] The wireless communication design employed in this invention avoids the problem of wired communication where rotating parts can break due to continuous twisting.

[0014] Through the above design, this invention achieves effective measurement of multiple parameters such as temperature, stress, and strain of rotor bearings in a wireless and passive manner. Attached Figure Description

[0015] Figure 1 This is a system side view of a wireless passive multi-parameter sensing and monitoring system for rotor bearings according to the present invention.

[0016] Figure 2 This is a rear view of a wireless passive multi-parameter sensing and monitoring system for rotor bearings according to the present invention.

[0017] Figure 3 This is a schematic diagram of the circuit board mounting structure of a wireless passive multi-parameter sensing and monitoring system for rotor bearings according to the present invention.

[0018] Figure 4 This is a flowchart illustrating the workflow of a wireless passive multi-parameter sensing and monitoring system for rotor bearings according to the present invention.

[0019] In the diagram: 11-Housing, 12-Sensor connector, 13-System mounting flange, 14-Photovoltaic panel, 21-Temperature sensor conditioning circuit board, 22-Stress sensor conditioning circuit board, 23-Strain sensor conditioning circuit board, 24-Central processing module circuit board, 25-Wireless communication module circuit board, 26-Power supply module voltage regulator and rectifier circuit board. Detailed Implementation

[0020] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0021] In a first aspect, to overcome the technical shortcomings of past slip ring actuators (high noise) and battery-powered telemetry devices (lack of explosion protection), this invention proposes a wireless passive multi-parameter sensing and monitoring system suitable for rotor bearings. Utilizing the more stable transmission characteristics of digital signals compared to analog signals, the system shortens the analog signal transmission distance of sensitive devices to reduce background noise. The design employs photovoltaic power supply and wireless communication, allowing the entire detection system to rotate with the shaft system while meeting the explosion-proof design requirements of the engine. Simultaneously, the layered design of different parameter conditioning circuit boards avoids crosstalk noise between different parameter signals.

[0022] The monitoring system of the present invention includes: The multi-physical parameter acquisition module is used to acquire multiple physical parameters, including but not limited to temperature data acquired using thermocouple sensors, stress data acquired using MEMS stress sheets, strain data acquired using fiber optic grating sensors, and vibration data acquired using piezoelectric acceleration. A power supply module that uses a photovoltaic panel as an energy receiving device is installed at the end of the monitoring system. The photovoltaic panel generates electrical energy by irradiating with an external light source and is equipped with a voltage stabilizing and rectifying circuit. The system employs a layered design with different parameter conditioning circuit boards. For analog signals with different physical parameters, separate conditioning circuit boards are set up to avoid signal crosstalk. Furthermore, each conditioning circuit board is equipped with a digital-to-analog converter chip with temperature compensation function. The wireless communication module selects different frequency communication channels based on the electromagnetic design within the engine environment to achieve effective data transmission, and has an internal radio frequency antenna. A central processing module with an MCU chip and a host computer; The analog signals of physical parameters acquired by the multi-physical parameter acquisition module are processed into digital signals by different parameter conditioning circuit boards with layered design. These signals are then transmitted to the central processing module with an MCU chip, and then converted into electromagnetic waves by the wireless communication module and scattered into the environment. The host computer receives the electromagnetic waves and processes them into the required monitoring data.

[0023] In a second aspect, the present invention provides a monitoring method for a wireless passive multi-parameter sensing monitoring system for rotor bearings, as described in the first aspect, such as... Figure 4 As shown, it includes the following steps: S1. Install the monitoring system on the shaft system where the rotor bearing is located, and let it rotate with the shaft system; specifically, as follows: Figures 1-2 As shown, the outer casing 11 of the monitoring system is concentrically mounted to the shaft system containing the rotor bearing via the system mounting flange 13, and the multi-physical parameter acquisition module is connected to the monitoring system via the sensor wiring port 12. Throughout the process, the power supply module uses the photovoltaic panel 14 as the energy receiving device, and the energy obtained is used to power the entire system through the power supply module's voltage regulator and rectifier circuit board 26.

[0024] S2. The analog signals of multiple physical parameters are processed into digital signals by different parameter conditioning circuit boards with a layered design. Specifically, multiple physical parameters are acquired by the multi-physical parameter acquisition module, including but not limited to temperature data acquired using thermocouple sensors, stress data acquired using MEMS stress sheets, strain data acquired using fiber optic grating sensors, and vibration data acquired using piezoelectric acceleration. After the analog signals of multiple physical parameters are connected to the system, they are processed into digital signals by the temperature sensor conditioning circuit board 21, the stress sensor conditioning circuit board 22, and the strain sensor conditioning circuit board 23.

[0025] S3. The digital signal is transmitted to the central processing module and then converted into electromagnetic waves by the wireless communication module and emitted into the environment. Specifically, the digital signal is transmitted to the central processing module circuit board 24, first buffered in the register, and then transmitted to the wireless communication module circuit board 25 through protocol encoding, where it is converted into electromagnetic wave signals and emitted into the environment.

[0026] S4. After receiving the electromagnetic waves, the host computer processes them into the required monitoring data.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wireless passive multi-parameter sensing and monitoring system suitable for rotor bearings, characterized in that: It includes a multi-physical parameter acquisition module, a power supply module, different parameter conditioning circuit boards with a layered design, a central processing module with an MCU chip, a wireless communication module, and a host computer. The analog signals of physical parameters acquired by the multi-physical parameter acquisition module are processed into digital signals by the different parameter conditioning circuit boards with a layered design, and then transmitted to the central processing module with an MCU chip. The signals are then converted into electromagnetic waves by the wireless communication module and emitted into the environment. After receiving the electromagnetic waves, the host computer processes them into the required monitoring data.

2. The wireless passive multi-parameter sensing and monitoring system for rotor bearings as described in claim 1, characterized in that: The power supply module uses a photovoltaic panel as the energy receiving device and is equipped with a voltage regulator and rectifier circuit.

3. The wireless passive multi-parameter sensing and monitoring system for rotor bearings as described in claim 1, characterized in that: The layered design of the different parameter conditioning circuit boards is designed to avoid signal crosstalk by setting up separate conditioning circuit boards for analog signals with different physical parameters, and each conditioning circuit board is equipped with a digital-to-analog converter chip with temperature compensation function.

4. The wireless passive multi-parameter sensing and monitoring system for rotor bearings as described in claim 1, characterized in that: The wireless communication module selects different frequency communication channels based on the electromagnetic design within the engine environment to achieve effective data transmission, and has an internal radio frequency antenna.

5. A wireless passive multi-parameter sensing and monitoring system for rotor bearings as described in claim 1, characterized in that: The physical parameters include, but are not limited to, temperature data acquired using thermocouple sensors, stress data acquired using MEMS stress sheets, strain data acquired using fiber optic grating sensors, and vibration data acquired using piezoelectric acceleration.

6. The wireless passive multi-parameter sensing and monitoring system for rotor bearings as described in claim 1, characterized in that: The monitoring process includes the following steps: S1. Install the monitoring system on the shaft system where the rotor bearing is located, and let it rotate together with the shaft system; S2. Analog signals with multiple physical parameters are processed into digital signals by different parameter conditioning circuit boards with layered design; S3. The digital signal is transmitted to the central processing module, and then converted into electromagnetic waves by the wireless communication module and emitted into the environment. S4. After receiving the electromagnetic waves, the host computer processes them into the required monitoring data.

7. A wireless passive multi-parameter sensing and monitoring system for rotor bearings as described in claim 6, characterized in that: Throughout the process, the entire monitoring system is powered by a power supply module that uses photovoltaic panels as energy receiving devices.

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