Miniaturized and portable intelligent high-precision dynamometer equipment

Abstract

The invention relates to the technical field of dynamometers, and discloses miniaturized and portable intelligent high-precision dynamometer equipment, which comprises a protection assembly, a front baffle plate is arranged at the left end of the protection assembly, a contact head penetrates through the front baffle plate, and a power supply assembly is arranged at the right end of the protection assembly. The outer side of the contact head is sleeved with a strain sensor, a transmission assembly is arranged at the right end of the strain sensor, and double-reading-head sensors are arranged in the middles of the two sides of the transmission assembly. Through cooperation of the contact head, the strain sensor and the transmission assembly, torque change can be accurately captured, high-precision measurement of the rotating speed is achieved through cooperation of the double-reading-head sensor and the rotating speed sensor, and it is ensured that the measurement error is controlled within an extremely small range. The electromagnetic eddy current brake in the integrated control mechanism can realize stepless loading, and the device has the advantages of high-precision measurement, intelligent control, convenient operation and the like while realizing miniaturization, and is suitable for dynamic performance detection in various complex scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of dynamometers, and in particular to a miniaturized and portable intelligent high-precision dynamometer device. Background Art

[0002] In the fields of modern industry and scientific research, the performance detection of power equipment has put forward higher requirements for the accuracy and portability of dynamometers. Traditional dynamometers generally have a bulky structure and a large volume, and mostly adopt a split mechanical structure and a large brake. The overall weight of the equipment can reach dozens of kilograms or even hundreds of kilograms, making it difficult to meet the on-site rapid detection requirements. Especially in scenarios such as on-site sampling inspection of new energy vehicle motors and power tests of field scientific research equipment, transportation and installation are extremely inconvenient.

[0003] The measurement accuracy is limited. Traditional torque sensors are easily affected by environmental vibration and temperature drift. The speed measurement mostly relies on a single-reading head encoder, which has an eccentric error and cannot meet the detection standards of high-precision equipment such as new energy motors and precision instruments; the environmental adaptability is poor. The conventional shell has weak protection ability, and the internal sensors are not earthquake-proofed, which is prone to measurement deviation in a vibrating environment and does not support battery power supply, making it difficult to adapt to complex working conditions. Summary of the Invention

[0004] The purpose of the present invention is to provide a miniaturized and portable intelligent high-precision dynamometer device to solve the problems that traditional dynamometers are inconvenient for transportation and installation during on-site detection due to their bulky structure and large volume, and have limited measurement accuracy.

[0005] The present invention specifically adopts the following technical solutions to achieve the above purpose: A miniaturized and portable intelligent high-precision dynamometer device, including a protection component. A front baffle is provided at the left end of the protection component. A contact head penetrates through the inside of the front baffle. A power supply component is provided at the right end of the protection component. A strain sensor is sleeved outside the contact head. A transmission component is provided at the right end of the strain sensor. Double-reading head sensors are provided in the middle of both sides of the transmission component. An integrated control mechanism is provided at the right end of the transmission component. The strain sensor, the transmission component, the double-reading head sensors, and the integrated control mechanism are arranged inside the protection component. A touch display screen is provided on the front side of the outside of the protection component. The transmission component includes an elastic shaft, a flexible coupling, and a support seat. The elastic shaft penetrates through the center of the flexible coupling. The support seat is provided at the bottom end of the flexible coupling. The integrated control mechanism includes an electromagnetic eddy current brake and an intelligent sensing component. The intelligent sensing component is provided at the left end of the electromagnetic eddy current brake.

[0006] Further, the protection component includes a corrugated outer shell and a shockproof component. The shockproof component is arranged at the inner peripheral side walls of the corrugated outer shell. The corrugated outer shell of the protection component is made of aluminum alloy, which improves the bending strength and reduces the weight.

[0007] Further, the shockproof component includes an elastic support and honeycomb cotton. The elastic support is arranged on the upper and lower sides of the honeycomb cotton, reducing the interference of external vibration on the elastic shaft and the sensor, and ensuring the measurement accuracy.

[0008] Further, the power supply component includes a power supply housing, a battery box and a charging port. The inner side of the power supply housing is arranged at the right end of the protection component, supplying power to the whole machine. In the non-measurement state, the data processing chip controls each module to enter the sleep mode.

[0009] Further, the battery box is arranged on the outer side of the power supply housing, and the charging port is arranged at the bottom end of the power supply housing. The charging port is equipped with a waterproof rubber plug.

[0010] Further, the left end of the elastic shaft is fixedly connected to the right side of the strain gauge sensor. The double reading head sensor is arranged at the side end of the side wall of the flexible coupling. The outer end of the support seat is arranged inside the protection component. The right end of the elastic shaft is connected to the left end of the integrated control mechanism. When the measured device operates, the power is transmitted to the elastic shaft through the contact head, causing the elastic shaft to generate torsional deformation.

[0011] Further, the right end of the transmission component is arranged at the left end of the intelligent sensing component. The right end of the intelligent sensing component is arranged inside the power supply component. The torsional deformation of the elastic shaft causes the resistance value of the strain gauge to change. The bridge outputs a weak voltage signal proportional to the torque, which is amplified by the signal conditioning circuit and then transmitted to the data processing chip of the intelligent sensing component.

[0012] Further, the intelligent sensing component includes a rotational speed sensor, an information transmitter and a data processing chip. The rotational speed sensor is arranged at the side wall of the transmission component. The data processing chip is arranged inside the touch display screen. The non-contact Hall sensor (rotational speed sensor) in the intelligent sensing component is installed at the right end of the elastic shaft, sensing the change of the magnetic flux of the tooth top and tooth groove of the induction gear, and outputting a high-frequency pulse signal, which is mutually calibrated with the data of the optical encoder.

[0013] Further, the bottom end of the information transmitter is arranged at the top end of the rotational speed sensor. The outer end of the information transmitter is connected to the data processing chip. The rotational speed sensor is a non-contact Hall sensor. The data processing chip receives the torque and rotational speed signals in real time, and the processed data is synchronously displayed on the touch display screen.

[0014] Furthermore, the dual-reading head sensor is an incremental photoelectric encoder. The two reading heads with a 90° phase difference output pulse signals, and the rotation direction is judged by the phase difference to collect rotational speed data in real time.

[0015] Compared with the prior art, the present invention provides a miniaturized and portable intelligent high-precision dynamometer device, which has the following beneficial effects: 1. This miniaturized and portable intelligent high-precision dynamometer device effectively solves the problems of large volume, low precision, and complex operation of traditional dynamometers through innovative structural design and function integration. The combination of the wavy outer shell and the shock-absorbing component in the protection component not only improves the shock resistance of the device, reduces the interference of external vibration on measurement, but also realizes portability through lightweight design.

[0016] 2. This miniaturized and portable intelligent high-precision dynamometer device can accurately capture torque changes through the cooperation of the contact head, strain gauge sensor and transmission component. Combined with the dual-reading head sensor and rotational speed sensor, it realizes high-precision measurement of rotational speed and ensures that the measurement error is controlled within a very small range. The electromagnetic eddy current brake in the integrated control mechanism can achieve stepless loading. Generally speaking, while realizing miniaturization, this device has the advantages of high-precision measurement, intelligent control and convenient operation, and is suitable for power performance detection in a variety of complex scenarios. Description of the Drawings

[0017] Figure 1 It is a three-dimensional perspective view of the left end of the overall structure of the present invention shown on the outside; Figure 2 It is a three-dimensional perspective view of the right end of the overall structure of the present invention shown on the outside; Figure 3 It is a left sectional view of the internal structure of the present invention shown; Figure 4 It is a three-dimensional perspective view of the front side sectional view of the internal structure of the overall structure of the present invention shown; Figure 5 It is a three-dimensional perspective view of the detailed display of the protection component of the present invention; Figure 6 It is a three-dimensional perspective view of the structure between the transmission component and the integrated control mechanism of the present invention shown; Figure 7 It is a three-dimensional perspective view of the structure of the transmission component and the intelligent sensing component of the present invention shown; Figure 8 It is a three-dimensional perspective view of the structure between the internal structure of the intelligent sensing component and the touch display screen of the present invention shown; Figure 9 It is a three-dimensional perspective view of the structural layer of the shock-absorbing component of the present invention shown; Figure 10This is a three-dimensional perspective view showing the internal structure of the power supply component of the present invention.

[0018] In the figure: 1. Protection component; 11. Wavy outer shell; 12. Shock-proof component; 121. Elastic support; 122. Honeycomb cotton; 2. Front baffle; 3. Contact head; 4. Power supply component; 41. Power supply housing; 42. Battery box; 43. Charging port; 5. Strain gauge sensor; 6. Transmission component; 61. Elastic shaft; 62. Flexible coupling; 63. Support base; 7. Dual-reading head sensor; 8. Integrated control mechanism; 81. Electromagnetic eddy current brake; 82. Intelligent sensing component; 821. Rotation speed sensor; 822. Information transmitter; 823. Data processing chip; 9. Touch display screen. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0020] As Figures 1 - 10 shown, a miniaturized and portable intelligent high-precision dynamometer device includes a protection component 1. A front baffle 2 is provided at the left end of the protection component 1. A contact head 3 penetrates through the inside of the front baffle 2. A power supply component 4 is provided at the right end of the protection component 1. A strain gauge sensor 5 is sleeved outside the contact head 3. A transmission component 6 is provided at the right end of the strain gauge sensor 5. Dual-reading head sensors 7 are provided in the middle of both sides of the transmission component 6. An integrated control mechanism 8 is provided at the right end of the transmission component 6. The strain gauge sensor 5, the transmission component 6, the dual-reading head sensors 7, and the integrated control mechanism 8 are arranged inside the protection component 1. A touch display screen 9 is provided on the front side outside the protection component 1.

[0021] Among them, the dual-reading head sensor 7 is an incremental photoelectric encoder. When the elastic shaft 61 rotates, the dual-reading head sensor 7 rotates synchronously with the flexible coupling 62. Two reading heads with a 90° phase difference output pulse signals, and the rotation direction is judged through the phase difference to collect rotation speed data in real time; As Figures 3 - 5 and Figure 9As shown, the protection component 1 includes a corrugated outer shell 11 and a shockproof component 12. The shockproof component 12 is arranged at the inner peripheral sidewalls of the corrugated outer shell 11. The shockproof component 12 includes an elastic support 121 and honeycomb cotton 122. The elastic support 121 is arranged on the upper and lower sides of the honeycomb cotton 122. Heat sinks are arranged between the brake housing and the inner wall of the protection component 1. Combining with the breathable structure of the honeycomb cotton 122, the heat generated during loading is dissipated through the heat dissipation holes of the corrugated outer shell 11; As Figures 1 - 4 and Figure 10 shown, the power supply component 4 includes a power supply housing 41, a battery box 42 and a charging port 43. The inner side of the power supply housing 41 is arranged at the right end of the protection component 1. The battery box 42 is arranged on the outer side of the power supply housing 41. The charging port 43 is arranged at the bottom end of the power supply housing 41. It is connected to the protection component 1 by snap connection to supply power to the whole machine. The charging port 43 is equipped with a waterproof rubber plug. In the non-measurement state, the data processing chip 823 controls each module to enter the sleep mode; As Figure 4 、 Figure 6 and Figure 7 shown, the transmission component 6 includes an elastic shaft 61, a flexible coupling 62 and a support seat 63. The outer side of the elastic shaft 61 passes through the axis of the flexible coupling 62. The support seat 63 is arranged at the bottom end of the flexible coupling 62. The left end of the elastic shaft 61 is fixedly connected to the right side of the strain gauge sensor 5. The double-reading head sensor 7 is arranged at the side end of the sidewall of the flexible coupling 62. The outer end of the support seat 63 is arranged inside the protection component 1. The right end of the elastic shaft 61 is connected to the left end of the integrated control mechanism 8. Double-reading head sensors 7 are installed on both sides of the flexible coupling 62 of the transmission component 6. When the elastic shaft 61 rotates, the double-reading head sensor 7 rotates synchronously with the flexible coupling 62. Two reading heads with a phase difference of 90° output pulse signals, and the rotation direction is judged by the phase difference to collect the rotational speed data in real time; As Figure 4 、 Figures 6 - 8As shown in the figure, the right end of the transmission assembly 6 is arranged at the left end of the intelligent sensing assembly 82, and the right end of the intelligent sensing assembly 82 is arranged inside the power supply assembly 4. The integrated control mechanism 8 includes an electromagnetic eddy current brake 81 and an intelligent sensing assembly 82. The intelligent sensing assembly 82 is arranged at the left end of the electromagnetic eddy current brake 81. The intelligent sensing assembly 82 includes a rotational speed sensor 821, an information transmitter 822, and a data processing chip 823. The rotational speed sensor 821 is arranged at the side wall of the transmission assembly 6. The data processing chip 823 is arranged inside the touch display screen 9. The bottom end of the information transmitter 822 is arranged at the top end of the rotational speed sensor 821. The outer end of the information transmitter 822 is connected to the data processing chip 823. The rotational speed sensor 821 is a non-contact Hall sensor. The loading principle of the electromagnetic eddy current brake 81: The electromagnetic eddy current brake 81 in the integrated control mechanism 8 is connected to the elastic shaft 61 through a spline. When it is necessary to load the device under test, the data processing chip 823 outputs a PWM signal to adjust the current of the excitation coil, generates a magnetic field that interacts with the rotating conductor disk, and forms an eddy current braking torque.

[0022] Working principle: As Figures 1 - 10 shown in the figure, the power transmission path: The output shaft of the device under test is connected to the dynamometer through the contact head 3, and its right end is coaxially fixed to the elastic shaft 61 of the strain gauge sensor 5. When the device under test operates, the power is transmitted to the elastic shaft 61 through the contact head 3, causing the elastic shaft to undergo torsional deformation; Torque signal acquisition: The strain gauge sensor 5 is internally provided with 4 metal foil strain gauges, which are pasted at the evenly divided positions of 120° circumferentially on the elastic shaft to form a Wheatstone bridge circuit. The torsional deformation of the elastic shaft 61 causes the resistance value of the strain gauge to change, and the bridge outputs a weak voltage signal proportional to the torque. After being amplified by the signal conditioning circuit, it is transmitted to the data processing chip 823 of the intelligent sensing assembly 82; Rotational speed acquisition of the dual reading head sensor 7: The dual reading head sensor 7 is installed on both sides of the flexible coupling 62 of the transmission assembly 6. When the elastic shaft 61 rotates, the dual reading head sensor 7 rotates synchronously with the flexible coupling 62. The two reading heads with a 90° phase difference output pulse signals, and the rotation direction is judged through the phase difference to collect rotational speed data in real time; Auxiliary measurement of the Hall sensor: The non-contact Hall sensor (rotational speed sensor 821) in the intelligent sensing assembly 82 is installed at the right end of the elastic shaft 61, senses the change in the magnetic flux of the tooth top and tooth groove of the induction gear, outputs a high-frequency pulse signal, and calibrates with the photoelectric encoder data to eliminate the eccentricity error and improve the rotational speed measurement accuracy; Data processing: The data processing chip 823 receives the torque and rotational speed signals in real time. The processed data is synchronously displayed on the touch display screen 9 and stored in the built-in Flash; Loading principle of the electromagnetic eddy current brake 81: The electromagnetic eddy current brake 81 in the integrated control mechanism 8 is spline-connected to the elastic shaft 61. When loading the device under test is required, the data processing chip 823 outputs a PWM signal to adjust the current of the excitation coil, generating a magnetic field that interacts with the rotating conductor disk to form an eddy current braking torque; Heat dissipation and temperature management: Heat sinks are provided between the brake housing and the inner wall of the protection component 1. In cooperation with the breathable structure of the honeycomb cotton 122, the heat generated during loading is dissipated through the heat dissipation holes of the corrugated housing 11 to ensure that the housing temperature ≤ 45°C during long-term operation, avoiding affecting the sensor accuracy; Power supply and low-power design: The power supply housing 41 is snap-connected to the protection component 1 to supply power to the whole machine. The charging port 43 is equipped with a waterproof rubber plug. In the non-measurement state, the data processing chip 823 controls each module to enter the sleep mode; Mechanical protection structure: The corrugated housing 11 of the protection component 1 is made of 6061-T6 aluminum alloy, with the bending strength increased by 30% and the weight reduced by 15% compared with the flat structure; A dust-proof sealing ring is provided at the joint of the front baffle 2 and the contact head 3 to prevent foreign objects from invading; Buffering mechanism of the shock-proof component 12: The elastic support 121 (stainless steel S-shaped elastic sheet) of the shock-proof component 12 and the honeycomb cotton 122 are symmetrically arranged above and below the inner side of the housing, and can absorb vibrations in the 10 - 1000 Hz frequency band (vibration damping efficiency ≥ 85%), reducing the interference of external vibrations on the elastic shaft 61 and the sensor, and ensuring the measurement accuracy.

Claims

1. A miniaturized and portable intelligent high-precision dynamometer device, including a protection component (1), characterized in that: A front baffle (2) is provided at the left end of the protection component (1). A contact head (3) penetrates through the interior of the front baffle (2). A power supply component (4) is provided at the right end of the protection component (1). A strain sensor (5) is sleeved outside the contact head (3). A transmission component (6) is provided at the right end of the strain sensor (5). Double-reading head sensors (7) are provided in the middle of both sides of the transmission component (6). An integrated control mechanism (8) is provided at the right end of the transmission component (6). The strain sensor (5), the transmission component (6), the double-reading head sensors (7), and the integrated control mechanism (8) are arranged inside the protection component (1). A touch display screen (9) is provided on the front side outside the protection component (1); The transmission component (6) includes an elastic shaft (61), a flexible coupling (62), and a support base (63). The elastic shaft (61) penetrates through the axis of the flexible coupling (62) on the outside. The support base (63) is provided at the bottom end of the flexible coupling (62); The integrated control mechanism (8) includes an electromagnetic eddy current brake (81) and an intelligent sensing component (82). The intelligent sensing component (82) is provided at the left end of the electromagnetic eddy current brake (81).

2. The miniaturized and portable intelligent high-precision dynamometer device according to claim 1, characterized in that: The protection component (1) includes a corrugated outer shell (11) and a shockproof component (12). The shockproof component (12) is provided at the side walls around the interior of the corrugated outer shell (11).

3. The miniaturized and portable intelligent high-precision dynamometer device according to claim 2, wherein: The shockproof component (12) includes an elastic support (121) and honeycomb cotton (122). The elastic support (121) is provided on the upper and lower sides of the honeycomb cotton (122).

4. The miniaturized and portable intelligent high-precision dynamometer device according to claim 1, characterized in that: The power supply component (4) includes a power supply housing (41), a battery box (42), and a charging port (43). The inner side of the power supply housing (41) is provided at the right end of the protection component (1).

5. The miniaturized and portable intelligent high-precision dynamometer device according to claim 4, wherein: The battery box (42) is provided on the outside of the power supply housing (41). The charging port (43) is provided at the bottom end of the power supply housing (41).

6. The miniaturized and portable intelligent high-precision dynamometer device according to claim 1, characterized in that: The left end of the elastic shaft (61) is fixedly connected to the right side of the strain sensor (5). The double-reading head sensors (7) are provided at the side end of the side wall of the flexible coupling (62). The outer end of the support base (63) is provided inside the protection component (1). The right end of the elastic shaft (61) is connected to the left end of the integrated control mechanism (8).

7. The miniaturized and portable intelligent high-precision dynamometer device according to claim 1, wherein: The right end of the transmission component (6) is provided at the left end of the intelligent sensing component (82). The right end of the intelligent sensing component (82) is provided inside the power supply component (4).

8. The miniaturized and portable intelligent high-precision dynamometer device according to claim 1, characterized in that: The intelligent sensing component (82) includes a rotational speed sensor (821), an information transmitter (822), and a data processing chip (823). The rotational speed sensor (821) is provided at the side wall of the transmission component (6). The data processing chip (823) is provided inside the touch display screen (9).

9. The miniaturized and portable intelligent high-precision dynamometer device according to claim 8, characterized in that: The bottom end of the information transmitter (822) is disposed at the top end of the rotational speed sensor (821). The outer end of the information transmitter (822) is connected to the data processing chip (823). The rotational speed sensor (821) is a non-contact Hall sensor.

10. The miniaturized and portable intelligent high-precision dynamometer device according to claim 1, characterized in that: The dual reading head sensor (7) is an incremental photoelectric encoder.

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