Large-strain-deformation-ratio rotating shaft torque measuring device

Abstract

The utility model provides a large strain-deformation ratio rotating shaft torque measuring device which comprises a rotating shaft, a support is fixedly connected to the rotating shaft, a strain beam is fixedly connected to the end portion of the support, and measuring units are symmetrically arranged on the two sides of the strain beam. Each measuring unit comprises an insulating layer, a strain sensitive resistor and a bonding pad, the strain sensitive resistors included in the two measuring units form a Wheatstone bridge circuit, and a corresponding torque value can be obtained by measuring an output signal of the Wheatstone bridge circuit. The strain beam structure amplifies tiny torsional deformation of the rotating shaft, signal transmission is guaranteed through the high-precision strain sensitive resistor and the signal conditioning circuit, the Wheatstone bridge circuit is combined with the analog-to-digital converter, torque change signals can be captured, signal transmission is carried out in combination with the FPGA, subsequent transmission analysis is facilitated, and the reliability of the rotating shaft is improved. The device is simple and reasonable in structural design, modular design is adopted, all components are clear and independent, production, assembly and maintenance are convenient, and high practicability is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a torsion measurement technical field, concretely is a big strain deformation ratio rotating shaft torsion measurement device. BACKGROUND

[0002] Torsion measurement technology has important application value in industrial production, transportation and scientific research fields, especially in equipment operation state monitoring, power transmission system optimization and mechanical fault diagnosis scenes, and accurate measurement of torsion is the key to realize efficient and reliable operation. Traditional torsion measurement methods are mainly divided into two categories: non-contact and contact. Non-contact methods such as torsion sensors based on magnetic or optical principles can avoid the problems of contact methods, but the device complexity is high, the manufacturing and maintenance cost is expensive, which limits its use in a wide range of industrial scenes.

[0003] Contact methods such as slip ring torsion sensors measure torsion by strain gauges installed on rotating shafts combined with bridge circuits. However, during the torsion measurement process, how to effectively amplify the small torsional deformation signal is an important technical problem. Since the torsion received by the rotating shaft in actual work usually causes small angle deformation, direct measurement may not be able to obtain strong enough signal output. Therefore, the amplification capability of the existing device for small strain signals and the signal-to-noise ratio still need to be further improved to realize higher precision and higher sensitivity measurement. SUMMARY

[0004] The utility model aims at providing a big strain deformation ratio rotating shaft torsion measurement device. By setting a support and a strain beam on the rotating shaft, and amplifying the small torsional deformation of the rotating shaft through the strain beam, combined with the precise signal acquisition of Wheatstone bridge and the convenient processing of wireless data transmission module, high sensitivity, high precision and low interference torsion measurement is realized. This device not only has simple structure and low cost, but also can adapt to complex working environment, providing an efficient and reliable torsion measurement solution for industrial production and scientific research.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a big strain deformation ratio rotating shaft torsion measurement device, including rotating shaft, the rotating shaft is fixedly connected with support, the end of support is fixedly connected with strain beam, the both sides of strain beam are symmetrically provided with measuring unit;

[0006] The measuring unit includes an insulating layer, a strain sensitive resistor and a solder pad, the strain sensitive resistors included in the two measuring units form a Wheatstone bridge circuit, when the rotating shaft is twisted, the support is subjected to torsion and transmits to the Wheatstone bridge through the strain beam, causing the circuit resistance to change, and the corresponding torsion value can be obtained by measuring the output signal of the Wheatstone bridge circuit;

[0007] The measurement unit further comprises a power supply unit, a signal conditioning circuit, an analog-to-digital converter, an FPGA, a memory and a wireless transmission module, the Wheatstone bridge circuit transmits an output signal to the signal conditioning circuit, the signal conditioning circuit is electrically connected with the analog-to-digital converter, the analog-to-digital converter is connected with the FPGA, the memory and the wireless transmission module are both connected with the FPGA, and the wireless transmission module transmits a digital signal to a user end for processing.

[0008] Further, in the utility model, the strain beam is two or more than two.

[0009] Further, in the utility model, the material of the strain beam is spring steel or aluminum alloy.

[0010] Further, in the utility model, the power supply unit is a battery or a direct current power supply.

[0011] Further, in the utility model, the FPGA adopts EPC4E10F17C8N chip.

[0012] Further, in the utility model, the analog-to-digital converter adopts ADS8411 chip.

[0013] Further, in the utility model, the user end is a PC.

[0014] Beneficial effects, the technical scheme of the application has the following technical effects:

[0015] 1, the strain beam structure of the utility model amplifies the small torsional deformation of the rotating shaft, and the transmission of the signal is ensured through the high-precision strain sensitive resistor and the signal conditioning circuit, the Wheatstone bridge circuit is combined with the analog-to-digital converter, the torque change signal can be captured, the signal is transmitted in combination with the FPGA, subsequent transmission analysis is facilitated, the device has simple and reasonable structure design, adopts modular design, and each part component is clear and independent, convenient for production, assembly and maintenance, and has strong practicability.

[0016] It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be seen as part of the utility model subject matter of the present disclosure, as long as such concepts are not mutually contradictory.

[0017] The foregoing and other aspects, embodiments and features of the present utility model teaching can be understood more fully from the following description, taken in conjunction with the accompanying drawings. Other additional aspects of the present utility model teaching, such as exemplary embodiments, features and / or benefits, will be apparent from the description below and the specific embodiments described below. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures can be represented by a like numeral. For purposes of clarity, not every component can be called out in every drawing. There is now being described by way of example various embodiments of aspects of the present application with reference to the accompanying drawings in which:

[0019] Figure 1 It is a structural schematic diagram of the embodiment 1 of the present application.

[0020] Figure 2 It is a structural schematic diagram of the embodiment 2 of the present application.

[0021] Figure 3 It is a sectional schematic diagram of the measuring unit of the present application.

[0022] Figure 4 It is a system schematic diagram of the measuring unit of the present application.

[0023] In the drawings, the meanings of the reference numerals are as follows: 1, measuring unit; 2, strain beam; 3, support; 4, rotating shaft; 101, insulation layer; 102, strain sensitive resistance; 103, solder pad. DETAILED DESCRIPTION

[0024] In order to better understand the technical content of the present application, specific embodiments are described below with reference to the accompanying drawings. In the present disclosure, aspects of the present application are described with reference to the accompanying drawings, which show many embodiments of the description. The embodiments of the present disclosure are not necessarily defined in all aspects including the present application. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any one of many ways, since the concepts and embodiments disclosed by the present application are not limited to any implementation. In addition, some aspects of the present application can be used alone or in any appropriate combination with other aspects of the present application.

[0025] Embodiment 1

[0026] As shown in Figure 1 , 3 and 4, a large strain deformation ratio torque measuring device, comprising a measuring unit 1, a strain beam 2, a support 3 and a rotating shaft 4, the rotating shaft 4 as the main component of torque transmission, has good strength and rigidity, can reliably withstand external force and transmit torque to the support 3 and the strain beam 2. At the same time, the shape and material of the rotating shaft can be customized according to the application requirements, and the adaptability is strong. The rotating shaft 4 is fixedly connected with the support 3, which is the key component connecting the rotating shaft and the strain beam, has good rigidity and fixing capacity, and can accurately transmit the small torsional deformation of the rotating shaft to the strain beam. The design of the support facilitates assembly and installation, and improves the reliability of the whole device.

[0027] The end of the support 3 is fixedly connected with a strain beam 2, and the strain beam 2 can be two or more than two. The strain beam is designed through a flexible structure, such as an elongated shape in the figure, amplifies the small torsional deformation of the rotating shaft, and significantly improves the measurement sensitivity. The material selection is spring steel, which has good elastic modulus and fatigue resistance, and ensures long-term stable work. The multi-beam structure design can further enhance the measurement sensitivity and anti-interference ability of the device.

[0028] The two sides of the strain beam 2 are symmetrically provided with a measurement unit 1, which includes an insulating layer 101, a strain sensitive resistor 102 and a solder pad 103, which ensures high sensitivity and high stability of the strain signal. The insulating layer 101 effectively prevents electrical interference; the strain sensitive resistor 102 has high precision and can accurately convert the strain signal into resistance change; the solder pad 103 facilitates electrical connection, improves the reliability and assembly efficiency of the device. The strain sensitive resistors (102) included in the two measurement units 1 form a Wheatstone bridge circuit. When the rotating shaft 4 is twisted, the support 3 is subjected to a torsion and transmits it to the Wheatstone bridge through the strain beam 2, causing the resistance value of the circuit to change. The corresponding torque value can be obtained by measuring the output signal of the Wheatstone bridge circuit. The Wheatstone bridge is composed of strain sensitive resistors, which can convert the small strain signal into voltage output and has good anti-interference ability. The Wheatstone bridge structure can eliminate external interference such as environmental temperature changes and ensure measurement accuracy.

[0029] The measurement unit 1 also includes a power supply unit, a signal conditioning circuit, an analog-to-digital converter, an FPGA, a memory and a wireless transmission module. The Wheatstone bridge circuit transmits the output signal to the signal conditioning circuit, which can provide signal amplification and filtering functions, enhance signal strength and reduce noise interference, and provide high-quality signal input for subsequent analog-to-digital conversion. This is prior art and will not be described in detail. The signal conditioning circuit is electrically connected to the analog-to-digital converter, the analog-to-digital converter is connected to the FPGA, the memory and the wireless transmission module are connected to the FPGA, the memory provides data storage function, can record measurement history data, is convenient for subsequent analysis and optimization, and the wireless transmission module transmits digital signal to user end for processing.

[0030] In use, when the rotating shaft 4 is subjected to external torque, the rotating shaft will produce a certain degree of torsional deformation. The support 3 on the rotating shaft acts as a fixed connection component to transmit the torque effect to the strain beam 2. The strain beam 2 utilizes its flexible characteristics (elasticity and deformation ability) to further amplify the slight torsional deformation of the rotating shaft, providing a more obvious deformation signal for measurement. The measurement unit 1 symmetrically arranged on both sides of the strain beam 2 detects the deformation on the strain beam in real time through the strain sensitive resistor 102. When the strain beam is bent or deformed, the resistance value of the strain sensitive resistor 102 will change accordingly. This change reflects the size of the torque suffered by the strain beam. The strain sensitive resistor in the measurement unit 1 forms a Wheatstone bridge circuit, which can convert the resistance change caused by strain into a voltage signal output. The analog voltage signal output by the Wheatstone bridge circuit is first transmitted to the signal conditioning circuit. The signal conditioning circuit amplifies and filters the signal. The conditioned analog signal is converted into a high-precision digital signal by an analog-to-digital converter, providing input data for subsequent digital processing steps. The digital signal is transmitted to the FPGA, which processes the signal at high speed. The processed data can be stored in the memory for subsequent historical data query and analysis by the user. The FPGA sends the processed data to the user end through the wireless transmission module. After receiving the data, the user end can process and display the data through existing dedicated software or programs.

[0031] Example 2

[0032] As Figure 2 , 3 and 4, unlike example 1, the rotating shaft of this embodiment is a hollow shaft, and the strain beam 2 and the support 3 are arranged inside the rotating shaft 4. In this embodiment, the power supply unit is a battery, which is powered by the battery without the need for external power supply, facilitating use in complex or mobile environments and improving the portability and applicability of the device. The FPGA uses an EPC4E10F17C8N chip, which can provide high-speed data processing and control functions, realize complex signal processing and real-time feedback, and improve the overall performance of the system. The analog-to-digital converter uses an ADS8411 chip, which is a high-precision analog-to-digital conversion chip that can quickly convert analog signals to digital signals and provide high resolution to ensure the accuracy of measurement data. The user end is a PC, which can analyze and display data according to the signal as the host computer.

[0033] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the application. Those skilled in the art can make various modifications and improvements without departing from the spirit and scope of the application. Therefore, the protection scope of the present application shall be subject to the right claim.

Claims

1. A large strain deformation versus shaft torque measuring device, characterized by: The application relates to a torque measurement device, which comprises a rotating shaft (4), a support (3) fixedly connected to the rotating shaft (4), and a strain beam (2) fixedly connected to the end of the support (3); two measuring units (1) are symmetrically arranged on the two sides of the strain beam (2); the measuring unit (1) comprises an insulation layer (101), a strain sensitive resistor (102) and a solder pad (103); the strain sensitive resistors (102) of the two measuring units (1) constitute a Wheatstone bridge circuit; when the rotating shaft (4) is twisted, the support (3) is subjected to a torsion force and the torsion force is transmitted to the Wheatstone bridge through the strain beam (2) to cause the resistance value of the circuit to change; the corresponding torque value can be obtained by measuring the output signal of the Wheatstone bridge circuit; the measuring unit (1) further comprises a power supply unit, a signal conditioning circuit, an analog-to-digital converter, an FPGA, a memory and a wireless transmission module; the Wheatstone bridge circuit transmits an output signal to the signal conditioning circuit; the signal conditioning circuit is electrically connected to the analog-to-digital converter; the analog-to-digital converter is connected to the FPGA; the memory and the wireless transmission module are both connected to the FPGA; the wireless transmission module transmits a digital signal to a user end for processing. The strain beam (2) is two or more. The material of the strain beam (2) is spring steel or aluminum alloy.

2. A large strain deformation ratio shaft torque measuring device according to claim 1, characterized in that: The power supply unit is a battery or a direct current power supply.

3. A large strain deformation ratio shaft torque measuring device according to claim 1, characterized in that: The FPGA adopts an EPC4E10F17C8N chip.

4. A large-strain deformation ratio torque measurement device according to claim 1, characterized by: The analog-to-digital converter adopts an ADS8411 chip.

5. A large-strain deformation ratio torque measurement device according to claim 1, characterized by: The user end is a PC.

6. A large-strain deformation ratio torque measurement device according to claim 1, characterized by: ​ 7. A large-strain deformation ratio torque measurement device according to claim 1, characterized by: ​

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