A torsional acceleration sensing device

Abstract

The utility model discloses a torsional acceleration sensing device, including rotor assembly and stator assembly, be equipped with rotor installation hole on stator assembly, and one end of rotor assembly inserts into hole and keeps non -contact gap with it, and the coil that can transmit electric energy is arranged in rotor assembly and stator assembly respectively, be equipped with rotor power management unit, sensing unit, FPGA coding circuit and data sending unit in rotor assembly, and coil is electrically connected with rotor power management unit, and power management unit supplies power for each unit, and sensing unit detects rotation tangential acceleration, and FPGA coding circuit obtains and encodes and sends encoding data after, be equipped with stator power management unit, FPGA decoding circuit, data processing module and data receiving unit in stator assembly, and power management unit accesses external power supply and supplies power for each unit, and coil is electrically connected with output, and data receiving unit receives data, and FPGA decoding circuit decodes data and converts data through data processing module.

Description

Technical Field

[0001] This utility model relates to the field of metrology and testing technology, specifically to a torsional acceleration sensing device. Background Technology

[0002] Torsional acceleration sensors are key devices used to analyze the operating status of rotating machinery, monitor mechanical vibration characteristics, and diagnose faults. In modern industrial production, high-speed rotating machinery is widely used in wind turbines, engines, and transmission systems, and its operating status directly affects the safety and production efficiency of the equipment. Therefore, accurate and real-time monitoring of the torsional vibration of machinery is a crucial aspect of ensuring reliable equipment operation.

[0003] Currently, torsional acceleration sensors using optical detection systems are expensive and have large measurement errors. Secondly, the complex signal transmission path of these sensors reduces data timeliness and accuracy. Furthermore, existing parallel stator and rotor structures lack stability and are susceptible to interference in complex and harsh working environments, affecting measurement accuracy and long-term stability. Therefore, further research is needed to develop a torsional acceleration sensor that is structurally stable, provides direct signal transmission, has high reliability, and is easy to install. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide a torsional acceleration sensing device with stable structure, strong anti-interference ability, and long-term reliable operation in harsh environments.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A torsional acceleration sensing device includes a rotor assembly and a stator assembly. The stator assembly has a rotor mounting hole, and one end of the rotor assembly extends into the rotor mounting hole, with a non-contact gap between it and the stator assembly. Coils are respectively installed inside the rotor assembly and the stator assembly, and electrical energy is transmitted through inductive coupling of the coils. The rotor assembly also includes a rotor power management unit, a sensing unit, an FPGA encoding circuit, and a data transmission unit. The coils inside the rotor assembly are electrically connected to the input terminal of the rotor power management unit, which provides power to the sensing unit, the FPGA encoding circuit, and the data transmission unit. The FPGA encoding circuit is electrically connected to the output terminal of the sensing unit and the input terminal of the data transmission unit. The sensing unit detects the tangential acceleration during rotor assembly rotation. The FPGA encoding circuit acquires and encodes the detection data from the sensing unit. The data transmission unit transmits the encoded data outwards. The stator assembly internally houses a stator power management unit, an FPGA decoding circuit, a data processing module, and a data receiving unit. The stator power management unit can be connected to an external power supply. The coils located within the stator assembly are electrically connected to the output of the stator power management unit. The stator power management unit can also supply power to the FPGA decoding circuit, the data processing module, and the data receiving unit. The output of the data receiving unit is electrically connected to the input of the FPGA decoding circuit, and the output of the FPGA decoding circuit is electrically connected to the input of the data processing module. The data receiving unit can receive data sent by the data sending unit. The FPGA decoding circuit can acquire the data received by the data receiving unit and decode it. The data processing module can convert the decoded tangential acceleration into angular acceleration and transmit the data externally through its output.

[0006] During sensor installation, the rotor assembly is directly connected to the rotating shaft, while the stator assembly is fixed to the test bench. An external power supply powers the stator assembly, transmitting current to the rotor assembly via coils, achieving contactless power supply. This avoids the wear, arcing, and signal noise problems associated with traditional slip ring or contact connections, improving the sensor's lifespan and reliability. Furthermore, all electronic components are internally housed within the rotor, providing excellent protection. After sensor installation, the rotor assembly rotates with the rotating shaft, while the stator assembly remains stationary. When the rotating shaft undergoes torsional motion (rotation around the shaft), the sensing unit inside the rotor assembly detects the tangential acceleration at that moment. The sensing unit transmits the data, which is then encoded by the FPGA encoding circuit and sent via the data transmission unit. The data receiving unit receives the encoded data and transmits it to the FPGA decoding circuit for decoding. The decoded data is then converted into angular acceleration by the data processing module. FPGA encoding and decoding significantly improve data transmission efficiency and enhance anti-interference capabilities.

[0007] As an optimization, a plurality of threaded holes are evenly spaced around the axis of the rotor assembly on one end face, with the center line of the threaded holes parallel to the axis of the rotor assembly. The threaded holes facilitate a fixed connection with the rotating shaft via a connecting shaft clamp.

[0008] As an optimization, the data transmitting unit includes photoelectric transmitting modules fixedly connected to the circumferential surface of the rotor assembly and evenly spaced around the axis of the rotor assembly. The data receiving unit includes photoelectric receiving modules mounted on the stator assembly at positions corresponding to the photoelectric transmitting modules. The evenly spaced transmitting modules along the axial direction of the rotor assembly can form multiple optical signal channels. When the rotor assembly rotates, at least one transmitting module is always aligned with the receiving module, improving the continuity and stability of signal transmission and counteracting potential momentary signal loss or angular deviations caused by the high-speed rotation of the rotor assembly.

[0009] As an optimization, a plurality of emission mounting holes are evenly spaced on the circumferential surface of the rotor assembly around the axial direction of the rotor assembly. The emission mounting holes extend along the radial direction of the rotor assembly. A wire hole communicating with the interior of the rotor assembly is provided at the bottom of the emission mounting holes. The photoelectric emission module is embedded in the rotor assembly along the radial direction of the rotor assembly, and the emission end of the photoelectric emission module is set outward. The stator assembly has a recessed receiving mounting hole at the position corresponding to the transmitting mounting hole. A wire-passing hole communicating with the interior of the stator assembly is provided at the bottom of the receiving mounting hole. The photoelectric receiving module is embedded in the receiving mounting hole, with its receiving end facing outwards. A light-transmitting cover is provided at the opening of the receiving mounting hole. This design facilitates the positioning of the transmitting module's transmission direction during installation, allowing for better signal reception by the receiving module.

[0010] As an optimization, the stator assembly is equipped with a power connector and a data connector extending inside it. The inner end of the power connector is electrically connected to the input terminal of the stator power management unit, and the inner end of the data connector is electrically connected to the output terminal of the FPGA decoding circuit. After the rotor assembly is installed in place, the power cord and cable connections can be easily and quickly performed.

[0011] Compared with the prior art, this utility model has the following advantages: (1) The rotor assembly is embedded inside the stator assembly, forming a stable integrated structure. Compared with the parallel structure, it is more resistant to vibration and impact, ensuring long-term stable operation and measurement accuracy in complex and harsh environments, and has strong anti-interference ability. (2) Non-contact transmission: the rotor is powered by inductive coupling and the signal is transmitted by photoelectric transmission, which avoids the wear, arcing and signal noise problems caused by traditional slip ring or contact connection methods, and improves the service life and reliability of the sensor. (3) The structure is simple. The rotor part can be easily installed directly on the rotating shaft under test through the shaft clamp structure, and the stator part is fixed by the base. It is easy to integrate into the existing test bench system and has little impact on the system under test. Attached Figure Description

[0012] Figure 1 This is a front view of the present invention; Figure 2 for Figure 1 Sectional view of AA; Figure 3 This is a three-dimensional view of the present invention. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0014] like Figures 1 to 3 As shown, a torsional acceleration sensing device in this specific embodiment includes a rotor assembly 1 and a stator assembly 2. The stator assembly 2 has a rotor mounting hole. One end of the rotor assembly 1 extends into the rotor mounting hole and has a non-contact gap with the stator assembly 2. The rotor assembly 1 and the stator assembly 2 are respectively provided with coils, and electrical energy is transmitted through the inductive coupling of the coils. The rotor assembly 1 is also provided with a rotor power management unit, a sensing unit 3, an FPGA encoding circuit, and a data transmission unit. The coil located in the rotor assembly 1 is electrically connected to the input terminal of the rotor power management unit. The rotor power management unit can supply power to the sensing unit 3, the FPGA encoding circuit, and the data transmission unit respectively. The FPGA encoding circuit is electrically connected to the output terminal of the sensing unit and the input terminal of the data transmission unit respectively. The sensing unit 3 is used to detect the tangential acceleration when the rotor assembly 1 rotates. The FPGA encoding circuit can acquire the detection data of the sensing unit 3 and encode it. The data transmission unit can send the encoded data outward. The stator assembly 2 internally houses a stator power management unit, an FPGA decoding circuit, a data processing module, and a data receiving unit. The stator power management unit can be connected to an external power supply. The coils located within the stator assembly 2 are electrically connected to the output terminal of the stator power management unit. The stator power management unit can also supply power to the FPGA decoding circuit, the data processing module, and the data receiving unit. The output terminal of the data receiving unit is electrically connected to the input terminal of the FPGA decoding circuit, and the output terminal of the FPGA decoding circuit is electrically connected to the input terminal of the data processing module. The data receiving unit can receive data sent by the data sending unit. The FPGA decoding circuit can acquire the data received by the data receiving unit and perform data decoding. The data processing module can convert the decoded tangential acceleration into angular acceleration and transmit the data externally through its output terminal.

[0015] In this specific embodiment, a plurality of connecting threaded holes are evenly spaced around one end face of the rotor assembly 1 with the axis of the rotor assembly 1 as the center, and the center line of the connecting threaded holes is parallel to the axis of the rotor assembly 1.

[0016] In this specific embodiment, the data transmitting unit includes photoelectric transmitting modules fixedly connected to the circumferential surface of the rotor assembly 1 and evenly spaced around the axis of the rotor assembly 1, and the data receiving unit includes photoelectric receiving modules installed on the stator assembly 2 at positions corresponding to the photoelectric transmitting modules.

[0017] In this specific embodiment, a plurality of emission mounting holes 4 are evenly spaced on the circumferential surface of the rotor assembly 1 around the axial direction of the rotor assembly 1. The emission mounting holes 4 extend radially along the rotor assembly 1. A wire hole communicating with the interior of the rotor assembly 1 is provided at the bottom of the emission mounting holes 4. The photoelectric emission module is embedded therein along the radial direction of the rotor assembly 1, and the emission end of the photoelectric emission module is arranged outward. The stator assembly 2 is recessed at the position corresponding to the transmitting mounting hole 4, and a wire hole communicating with the interior of the stator assembly 2 is provided at the bottom of the receiving mounting hole. The photoelectric receiving module is embedded in the receiving mounting hole, and the receiving end of the photoelectric receiving module is set outward. A light-transmitting cover is provided at the opening of the receiving mounting hole.

[0018] In this specific embodiment, the stator assembly 2 is provided with a power connector 5 and a data connector 6 extending inside it. The inner end of the power connector 5 is electrically connected to the input end of the stator power management unit, and the inner end of the data connector 6 is electrically connected to the output end of the FPGA decoding circuit.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail can be made without departing from the spirit and scope of this utility model as defined in the appended claims.

Claims

1. A torsional acceleration sensing device, characterized in that: The system includes a rotor assembly and a stator assembly. The stator assembly has a rotor mounting hole, and one end of the rotor assembly extends into the rotor mounting hole, with a non-contact gap between it and the stator assembly. Coils are respectively installed inside the rotor assembly and the power is transmitted through inductive coupling of the coils. The rotor assembly also includes a rotor power management unit, a sensing unit, an FPGA encoding circuit, and a data transmission unit. The coils inside the rotor assembly are electrically connected to the input terminal of the rotor power management unit. The rotor power management unit can supply power to the sensing unit, the FPGA encoding circuit, and the data transmission unit respectively. The data input terminal of the FPGA encoding circuit is electrically connected to the data output terminal of the sensing unit, and the data output terminal of the FPGA encoding circuit is electrically connected to the data input terminal of the data transmission unit. The sensing unit is used to detect the tangential acceleration when the rotor assembly rotates. The stator assembly internally houses a stator power management unit, an FPGA decoding circuit, a data processing module, and a data receiving unit. The stator power management unit can be connected to an external power supply. The coils located within the stator assembly are electrically connected to the output terminal of the stator power management unit. The stator power management unit can also supply power to the FPGA decoding circuit, the data processing module, and the data receiving unit. The signal output terminal of the data receiving unit is electrically connected to the signal input terminal of the FPGA decoding circuit. The signal output terminal of the FPGA decoding circuit is electrically connected to the signal input terminal of the data processing module. The signal output terminal of the data processing module is used to transmit data characterizing angular acceleration.

2. The torsional acceleration sensing device according to claim 1, characterized in that: Multiple connecting threaded holes are evenly spaced around the axis of the rotor assembly on one end face of the rotor assembly, with the center line of the connecting threaded holes parallel to the axis of the rotor assembly.

3. The torsional acceleration sensing device according to claim 1, characterized in that: The data transmitting unit includes photoelectric transmitting modules fixedly connected to the circumferential surface of the rotor assembly and evenly spaced around the axis of the rotor assembly. The data receiving unit includes a photoelectric receiving module installed on the stator assembly at a position corresponding to the photoelectric transmitting module.

4. The torsional acceleration sensing device according to claim 3, characterized in that: The rotor assembly has a plurality of emission mounting holes recessed at even intervals around the axis of the rotor assembly. The emission mounting holes extend radially along the rotor assembly. The bottom of the emission mounting holes has a wire hole communicating with the interior of the rotor assembly. The photoelectric emission module is embedded in the rotor assembly radially, and the emission end of the photoelectric emission module is oriented outward. The stator assembly has a recessed receiving mounting hole at the position corresponding to the transmitting mounting hole. The bottom of the receiving mounting hole has a through hole that communicates with the interior of the stator assembly. The photoelectric receiving module is embedded in the receiving mounting hole, with the receiving end of the photoelectric receiving module facing outward. A light-transmitting cover is provided at the opening of the receiving mounting hole.

5. The torsional acceleration sensing device according to claim 1, characterized in that: The stator assembly is provided with a power connector and a data connector extending inside it. The inner end of the power connector is electrically connected to the input end of the stator power management unit, and the inner end of the data connector is electrically connected to the output end of the FPGA decoding circuit.

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