Proportion electromagnet performance detection device and method

Abstract

The invention provides a proportional electromagnet performance detection device and a proportional electromagnet performance detection method for a cotton picker power shift transmission. The device is composed of a stepping motor, a ball screw sliding rail, a base, a pull pressure sensor support, a pull pressure sensor, a force transmission short rod, a proportion electromagnet fixing support, a laser displacement sensor, a proportion electromagnet, a sliding block and an upper computer. The method for detecting the performance of the proportion electromagnet comprises the steps that the proportion electromagnet is installed on a test platform and powered on, at the moment, an armature push rod of the proportion electromagnet extends outwards, and in the process, numerical values displayed by the pull pressure sensor and the laser displacement sensor need to be recorded; the displacement of the ball screw sliding block is adjusted through the stepping motor, the numerical values of the pull-down pressure sensor and the laser displacement sensor are sequentially recorded every time adjustment is conducted, and then a displacement-force characteristic curve of the proportion electromagnet can be obtained. According to the device and the method for detecting the performance of the proportion electromagnet, static performance detection and transient performance detection of the proportion electromagnet can be realized, so that the reliability and the accuracy of the proportion electromagnet in practical application are comprehensively ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnet performance detection, and in particular to a proportional electromagnet performance detection device and method. Background Art

[0002] In agricultural mechanization production, cotton pickers are important agricultural harvesting machines, and their shifting performance and shifting quality are directly related to the quality and efficiency of cotton harvesting. Proportional electromagnets, as a high-precision, adjustable electrical-mechanical converter, are the core unit of the shifting control of the power shift transmission of cotton pickers. Their function is to accurately control the electromagnetic force to achieve precise adjustment of the shifting hydraulic oil, thereby achieving the continuity and accuracy of the shifting. The research and application of proportional electromagnets have promoted the development of agricultural machinery automation technology to a certain extent. The existing proportional electromagnet performance test bench has poor versatility, and the feeding mechanism is mostly manual, and the displacement sensor is mostly a contact displacement sensor, with low detection accuracy. In order to improve the versatility of the proportional electromagnet test bench and the accuracy of the proportional electromagnet performance detection, it is urgent to develop a high-precision proportional electromagnet performance detection test bench with good adaptability, which can not only perform static performance detection on the proportional electromagnet to evaluate its various performance indicators under stable working conditions, such as thrust and stroke, but also perform transient performance detection to analyze the performance of the proportional electromagnet in the process of rapid response and dynamic change, so as to fully ensure the reliability and accuracy of the proportional electromagnet in practical applications. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies of the existing proportional electromagnet test bench in the above-mentioned background technology, the present invention provides a proportional electromagnet performance detection device and method. The detection device can adapt to proportional electromagnets of different sizes, adaptively adjust the centering of the proportional electromagnet installation, and effectively reduce the difficulty of clamping the proportional electromagnet. The use of tension pressure sensors and laser displacement sensors can significantly improve the accuracy of proportional electromagnet performance detection.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] The present invention discloses a proportional electromagnet performance detection device and method. The proportional electromagnet performance detection test bench is composed of a stepper motor 1, a ball screw slide rail 2, a base 3, a tension pressure sensor bracket 4, a tension pressure sensor 5, a force transmission short rod 6, a proportional electromagnet upper fixed bracket 7, a proportional electromagnet lower fixed bracket 8, a laser displacement sensor 9, a proportional electromagnet 10, a slider 11, and a host computer 12. The stepper motor 1 drives the slider 11 through the ball screw slide rail 2, thereby driving the movement of the force transmission short rod 6 and the tension pressure sensor 5. The detection method steps are as follows:

[0006] Step 1: Install the proportional solenoid on the test platform;

[0007] Step 2: Adjust the position of the ball screw slider so that the push rod of the pull pressure sensor is in contact with the push rod of the proportional solenoid armature;

[0008] Step 3: Energize the proportional solenoid;

[0009] Step 4: Record the data measured by the tension pressure sensor and the laser displacement sensor;

[0010] Step 5: Use the stepper motor to adjust the displacement of the ball screw slider;

[0011] Step 6: Record the values ​​of the pull-down pressure sensor and the laser displacement sensor in sequence;

[0012] Step 7: Draw the proportional solenoid detection performance curve.

[0013] Preferably, the described proportional electromagnet performance detection device and method are characterized in that: the tension and pressure sensor bracket 4 is fixedly connected to the slider 11 by bolts, and the tension and pressure sensor bracket 4 adopts a unique "h" shape design. This design method is not only convenient for realizing the fixed connection between the tension and pressure sensor bracket 4 and the slider 11 by bolts, but also increases the stability of the bracket. The tension and pressure sensor 5 is fixedly connected to the tension and pressure sensor bracket 4 by a threaded short rod, and the force transmission short rod 6 is fixedly connected to the tension and pressure sensor 5 by bolts, forming a reliable transmission of force. The proportional electromagnet upper fixed bracket 7 and the proportional electromagnet lower fixed bracket 8 are fixedly connected by bolts, and the structure of the proportional electromagnet upper fixed bracket 7 and the proportional electromagnet lower fixed bracket 8 clamping the proportional electromagnet 10 is a V-shaped clamping block structure, such as Figure 4 As shown, this design method can easily adjust the position of the proportional electromagnet to ensure the centering, and can also be used to clamp proportional electromagnets of different sizes and models.

[0014] Preferably, the proportional electromagnet performance detection device and method are characterized in that the slider 11 drives the tension pressure sensor bracket 4 to move left and right, and the laser emitted by the laser displacement sensor 9 directly irradiates the tension pressure sensor bracket 4, which can indirectly measure the displacement of the proportional electromagnet push rod.

[0015] Preferably, the proportional electromagnet performance detection device and method are characterized in that: in the step 1, the proportional electromagnet is installed on the test platform. This step ensures that the center of the pull pressure sensor push rod and the center of the proportional electromagnet armature push rod are on the same axis to ensure the consistency and accuracy of force transmission during the test, which can minimize the lateral force caused by eccentricity, thereby avoiding measurement errors and ensuring the validity and reliability of the experimental data.

[0016] Preferably, the proportional electromagnet performance detection device and method are characterized in that the data collected by the tension and pressure sensor 5 and the laser displacement sensor 9 are transmitted to the proportional electromagnet measurement and control system host computer 12 through the serial port, and the proportional electromagnet performance curve is displayed on the host computer interface and the detection data is stored in a designated folder for preservation to facilitate subsequent data analysis.

[0017] The beneficial effects of the present invention are as follows:

[0018] By adopting a proportional electromagnet performance detection device and method proposed in this article, static performance detection of proportional electromagnet can be realized to evaluate its various performance indicators under stable working conditions, such as thrust and stroke; transient performance detection of proportional electromagnet can also be performed to analyze the performance of proportional electromagnet in the process of rapid response and dynamic change, so as to fully ensure the reliability and accuracy of proportional electromagnet in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A test bench for a proportional electromagnet performance detection device of the present invention;

[0020] Figure 2 It is a schematic diagram of the proportional electromagnet structure of the present invention;

[0021] Figure 3 The tension and pressure sensor bracket of the present invention;

[0022] Figure 4 The proportional electromagnet fixing bracket of the present invention;

[0023] Figure 5 It is a flow chart of the proportional electromagnet performance detection method of the present invention;

[0024] Figure 6 This is the measured displacement-electromagnetic force curve of the proportional electromagnet of the present invention.

[0025] Numbers in the figure: 1-stepping motor; 2-ball screw slide; 3-base; 4-tension pressure sensor bracket; 5-tension pressure sensor; 6-force transmission short rod; 7-proportional electromagnet upper fixing bracket; 8-proportional electromagnet lower fixing bracket; 9-laser displacement sensor; 10-proportional electromagnet; 11-slider; 12-host computer; 13-plastic end cover; 14-rear yoke; 15-coil; 16-magnetic isolation sheet; 17, 18, 19-O-ring; 20-armature; 21-coil frame; 22-front yoke; 23-push rod; 24-housing. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] A proportional electromagnet performance detection device and method of the present invention is characterized in that: the proportional electromagnet performance detection test bench is composed of a stepper motor 1, a ball screw slide rail 2, a base 3, a tension pressure sensor bracket 4, a tension pressure sensor 5, a force transmission short rod 6, a proportional electromagnet upper fixed bracket 7, a proportional electromagnet lower fixed bracket 8, a laser displacement sensor 9, a proportional electromagnet 10, a slider 11, and a host computer 12. The stepper motor 1 drives the slider 11 through the ball screw slide rail 2, thereby driving the movement of the force transmission short rod 6 and the tension pressure sensor 5.

[0028] The proportional electromagnet structure is as follows Figure 2 As shown, it consists of a plastic end cover 13, a rear yoke 14, a coil 15, a magnetic isolation sheet 16, an O-ring 17, an O-ring 18, an O-ring 19, an armature 20, a coil frame 21, a front yoke 22, a push rod 23, and a shell 24. The plastic end cover 13 and the shell 24 provide necessary protection for the electromagnet, and the rear yoke 14 and the front yoke 22 form a closed magnetic circuit. The coil 15 is wound around the coil frame 21 and generates a magnetic field through current. The magnetic isolation sheet 16 is used to adjust the distribution of the magnetic field, and the O-rings 17, 18, and 19 ensure the sealing performance of the electromagnet to prevent hydraulic oil leakage. The armature 20 moves under the action of the magnetic field and outputs force through the push rod 23, thereby achieving precise control of the force.

[0029] The aforementioned proportional electromagnet performance detection device and method, the detection method steps are as follows Figure 5 As shown:

[0030] Step 1: Install the proportional solenoid on the test platform to ensure that it is fixed reliably for subsequent performance testing;

[0031] Step 2: Adjust the position of the ball screw slider so that the push rod of the pull pressure sensor is in contact with the push rod of the proportional solenoid armature, preparing for the subsequent force and displacement test;

[0032] Step 3: Power on the proportional electromagnet to simulate the electromagnet excitation process under actual working conditions;

[0033] Step 4: Record the data measured by the tension pressure sensor and the laser displacement sensor;

[0034] Step 5: Use the stepper motor to adjust the displacement of the ball screw slider;

[0035] Step 6: After each adjustment, record the values ​​of the pull-down pressure sensor and the laser displacement sensor in turn to ensure the continuity and accuracy of the data;

[0036] Step 7: Draw the proportional solenoid detection performance curve to intuitively display the displacement-force characteristics of the proportional solenoid.

[0037] The described proportional electromagnet performance detection device and method are characterized in that: the tension and pressure sensor bracket 4 is fixedly connected to the slider 11 by bolts, and the tension and pressure sensor bracket 4 adopts a unique "h" shape design. This design method not only facilitates the fixed connection between the tension and pressure sensor bracket 4 and the slider 11 by bolts, but also increases the stability of the bracket. The tension and pressure sensor 5 is fixedly connected to the tension and pressure sensor bracket 4 by a threaded short rod, and the force transmission short rod 6 is fixedly connected to the tension and pressure sensor 5 by bolts, forming a reliable transmission of force. The proportional electromagnet upper fixed bracket 7 and the proportional electromagnet lower fixed bracket 8 are fixedly connected by bolts, and the structure of the proportional electromagnet upper fixed bracket 7 and the proportional electromagnet lower fixed bracket 8 clamping the proportional electromagnet 10 is a V-shaped clamping block structure, such as Figure 4 As shown, this design method can easily adjust the position of the proportional electromagnet to ensure the centering, and can also be used to clamp proportional electromagnets of different sizes and models.

[0038] The device and method for detecting the performance of a proportional electromagnet are characterized in that: the slider 11, driven by the ball screw slide rail, drives the tension and pressure sensor bracket 4 to move left and right in the horizontal direction, and the laser beam emitted by the laser displacement sensor 9 directly irradiates the tension and pressure sensor bracket 4. In this way, the actual displacement of the proportional electromagnet push rod can be indirectly measured. The model of the laser displacement sensor 9 is BOJKE-100NZ. The effective detection range of the laser displacement sensor 9 is 65-135mm, and the detection accuracy is 0.075mm, which can meet the detection accuracy requirements of the proportional electromagnet performance detection test bench. The non-contact measurement method of the laser displacement sensor 9 avoids the wear and interference caused by traditional contact measurement, and further improves the performance and life of the entire detection system.

[0039] The described proportional electromagnet performance detection device and method are characterized in that: the tension pressure sensor 5 model is Zhongwan Jinnuo JLBS-1, and its detection range is 0-200N. This range fully considers the electromagnetic force that the proportional electromagnet may generate in actual applications, thereby being able to completely cover the electromagnetic force range of the proportional electromagnet.

[0040] The described proportional electromagnet performance detection device and method are characterized in that: in the described step 1, the proportional electromagnet is installed on the test platform. This step ensures that the center of the pull pressure sensor push rod and the center of the proportional electromagnet armature push rod are on the same axis, ensuring the consistency and accuracy of force transmission during the test, and can minimize the lateral force caused by eccentricity, thereby avoiding measurement errors and ensuring the validity and reliability of the experimental data.

[0041] The device and method for detecting the performance of a proportional electromagnet are characterized in that the data collected by the tension and pressure sensor 5 and the laser displacement sensor 9 are transmitted to the upper computer 12 of the proportional electromagnet measurement and control system through the serial port, and the upper computer interface displays the performance curve of the proportional electromagnet and stores the detection data in a designated folder for preservation, so as to facilitate subsequent data analysis.

[0042] The device and method for detecting the performance of a proportional electromagnet are characterized in that: Figure 6 The proportional electromagnet displacement-force characteristic curve measured by a proportional electromagnet performance detection device and method described in the present invention is demonstrated. The curve intuitively and clearly shows the change of the electromagnetic force output by the proportional electromagnet under different displacement conditions, verifying the feasibility of the detection device of the present invention and the reliability of the detection method.

[0043] The present invention mainly proposes a proportional electromagnet performance detection device and method, which has certain reference significance for proportional electromagnet performance detection. The proportional electromagnet performance detection device and method proposed by the present invention are not only applicable to proportional electromagnets, but also to other types of electromagnets. The proposed detection method has certain reference significance for the performance detection of the same type of electromagnets.

[0044] The above shows and describes 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, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A proportional electromagnet performance detection device and method, characterized in that: The proportional electromagnet performance detection test bench is composed of a stepper motor (1), a ball screw guide rail (2), a base (3), a tension pressure sensor bracket (4), a tension pressure sensor (5), a force transmission short rod (6), a proportional electromagnet upper fixed bracket (7), a proportional electromagnet lower fixed bracket (8), a laser displacement sensor (9), a proportional electromagnet (10), a slider (11), and a host computer (12). The stepper motor 1 drives the slider 11 through the ball screw guide rail 2, thereby driving the movement of the force transmission short rod 6 and the tension pressure sensor 5. The detection method steps are as follows: Step 1: Install the proportional solenoid on the test platform; Step 2: Adjust the position of the ball screw slider so that the push rod of the pull pressure sensor is in contact with the push rod of the proportional solenoid armature; Step 3: Energize the proportional solenoid; Step 4: Record the data measured by the tension pressure sensor and the laser displacement sensor; Step 5: Use the stepper motor to adjust the displacement of the ball screw slider; Step 6: Record the values ​​of the pull-down pressure sensor and the laser displacement sensor in sequence; Step 7: Draw the proportional solenoid detection performance curve.

2. A proportional electromagnet performance detection device and method according to claim 1, characterized in that: The tension and pressure sensor bracket (4) is fixedly connected to the slider (11) by bolts, the tension and pressure sensor (5) is fixedly connected to the tension and pressure sensor bracket (4) by a threaded short rod, the force transmission short rod (6) is fixedly connected to the tension and pressure sensor (5) by bolts, the proportional electromagnet upper fixed bracket (7) and the proportional electromagnet lower fixed bracket (8) are fixedly connected by bolts, and the structure of the proportional electromagnet upper fixed bracket (7) and the proportional electromagnet lower fixed bracket (8) for clamping the proportional electromagnet (10) is a V-shaped clamping block structure. This design can facilitate the adjustment of the proportional electromagnet position to ensure the centration, and can also be suitable for clamping proportional electromagnets of different sizes.

3. A proportional electromagnet performance detection device and method according to claim 1, characterized in that: The slide block (11) drives the tension pressure sensor bracket (4) to move left and right, and the laser emitted by the laser displacement sensor (9) directly irradiates the tension pressure sensor bracket (4), thereby indirectly measuring the displacement of the proportional electromagnet push rod.

4. A proportional electromagnet performance detection device and method according to claim 1, characterized in that: In the step 1, the proportional electromagnet is installed on the test platform. In this step, it is necessary to ensure that the center of the push rod of the pull pressure sensor and the center of the push rod of the proportional electromagnet armature are on the same axis to ensure the consistency of force transmission during the test.

5. A proportional electromagnet performance detection device and method according to claim 1, characterized in that: The data collected by the tension and pressure sensor (5) and the laser displacement sensor (9) are transmitted to a proportional electromagnet measurement and control system host computer (12) via a serial port, and the host computer interface displays the proportional electromagnet performance curve and stores the detection data in a designated folder for preservation.

Images