A sampling comparison servo drive quality consistency detection system

Abstract

The present invention discloses a sampling comparison servo driver quality consistency detection system, which includes a motor test platform, a motor, a servo driver to be tested and a hub. The encoder signal line and the data output signal line form a weak current terminal in the hub; the power line of the motor and the power socket connection form a strong current terminal in the hub. The product matrix to be tested on the product detection conveyor is extracted in an S-shaped and / or 8-shaped manner, and the extracted products to be tested are connected to the weak current terminal and the strong current terminal; the motor is connected to 70% of the rated load, and the motor is connected to the weak current terminal and the strong current terminal in [‑n N ,n N ] range; the forward and reverse running time and temperature rise deviation of the tested product are within ±0.3%, and the product is qualified. The wires required by the present invention are integrated in the hub to form strong current wiring terminals and weak current wiring terminals to prevent wiring errors. At the same time, it is much simpler to disassemble and replace the tested product, saving time; the S-type and 8-shaped extraction methods are used to meet the percentage of products in the comparison range and the total number of samples.

Description

Technical Field

[0001] The invention relates to the detection of servo drivers, and in particular to a system for randomly selecting and detecting servo drivers produced in batches. Background Art

[0002] Servo drives are core components of advanced manufacturing and processing equipment. Their technical performance and reliability are crucial to processing quality. Testing the consistency index of servo drives mainly involves testing the temperature rise of the drive board and the forward and reverse time with load during the operation of the motor. In terms of the current popular digital workshop and smart factory construction content, there are few mature technologies for technical performance testing of mass-produced servo drive products. During testing, it is necessary to connect to the motor encoder signal line, the motor power supply terminal, the base data output signal line of the test platform, and the public power connection terminal. These connections are time-consuming and laborious when wiring. If the installation and wiring operations are improper, or if there are no standardized steps, it may affect the results of product testing, or even get completely opposite testing results. Summary of the invention

[0003] Based on the above problems, the present invention proposes a servo drive quality consistency detection system by sampling comparison, in which batches of servo drives to be tested are arranged into a matrix of ten rows and five columns on a product detection conveyor table, and the products to be tested are connected to the strong and weak current wiring terminals in the servo drive quality consistency detection system by sampling comparison through S-type and 8-type extraction.

[0004] The technical scheme adopted is: a sampling and comparison servo drive quality consistency detection system, including a motor test platform, a motor, a servo drive to be tested and a hub; the motor is located on the motor test platform; an equivalent load flywheel is installed at one end of the motor shaft, and the power line and encoder signal line on the motor are respectively connected to the hub; a common power line and a data output signal line are neatly arranged under the base of the motor test platform; the common power line is connected to a power socket; the power socket is connected to the hub; the power socket is located on the motor test platform; one end of the data output signal line extends to the top of the motor test platform to form a data output interface; the bus of the data output interface is connected to the hub; one side of the hub has an output terminal, and the output terminal is divided into a strong current wiring terminal and a weak current wiring terminal; the hub is located above the motor test platform; a temperature sensor is installed on the servo drive to be tested to detect the heating condition of the driver board; the power line of the servo drive to be tested is connected to the strong current wiring terminal, and the data signal line is connected to the weak current wiring terminal.

[0005] Furthermore, in the hub, the encoder signal line and the data output signal line constitute a weak-current wiring terminal; the power line of the motor and the power socket wiring constitute a strong-current wiring terminal.

[0006] A sampling comparison method for servo drive quality consistency detection is disclosed. On a product detection conveyor table, the products are arranged as a whole in rows and columns to form a product matrix. During detection, 20% and 40% sampling is adopted according to the number of products in the matrix. For 20% sampling, S-type extraction is adopted; for 40% sampling, 8-shaped extraction is adopted.

[0007] Furthermore, S-type extraction is to arrange the products to be tested on the product inspection conveyor table into ten rows and five columns to form a product matrix, with a total of 50 products to be tested; the S-type starts with the product in the first row and third column, and ends with the product in the tenth row and third column, and the starting and ending points are on a straight line, which is perpendicular to the product inspection conveyor table; in S-type extraction, one product can be randomly selected from each row, and a total of 10 products are selected, that is, the number of products selected is 20% of the matrix of products to be tested on the product inspection conveyor table.

[0008] Furthermore, the products to be tested for the 8-shaped extraction are an S-shaped extraction plus the previous S-shaped mirror extraction, and the two Ss are merged to form an 8-shaped shape; the 8-shaped extraction is divided into two parts, the first part is the S-shaped extraction, that is, the product starting from the third column of the first row and ending at the third column of the tenth row; the second part is the S-shaped mirror extraction, that is, the product starting from the third column of the first row and moving in the opposite direction of the S-shaped extraction, and ending at the third column of the tenth row; For the products to be tested for the 8-shaped extraction, 18 products to be tested are randomly selected. Since the starting and ending points are repeated twice, that is, the 8-shaped extraction, the accurate extraction rate is 36%.

[0009] Furthermore, when extracting the products to be tested, the S-type and the 8-type are used alternately, that is, the first product matrix to be tested adopts the S-type extraction, and the second product matrix to be tested adopts the 8-type extraction.

[0010] Furthermore, the data signal line of the product to be tested is connected to the weak current wiring terminal, and the power line of the product to be tested is connected to the strong current wiring terminal; the motor is connected to 70% of the rated load, and the N ,n N ] range; the motor accelerates from 0 speed to rated speed n N， Then brake to -n N， The time of this cycle is T, and the temperature of the driver board temperature sensor of the product to be tested is recorded at the same time; if the forward and reverse running time and temperature rise deviation of the product to be tested are within ±0.3%, the product to be tested is qualified.

[0011] The present invention first forms a matrix of ten rows and five columns for the products to be tested, and then connects the products to be tested to the strong and weak current terminals of the servo drive quality consistency detection device for sampling comparison through S-type and 8-type extraction methods. The motor is connected to 70% of the rated load, and the motor is connected to the servo drive quality consistency detection device for sampling comparison. N ,n N ] range, the motor accelerates from 0 speed to the rated speed nN， Then brake to -n N， The time of this cycle is T, and the heating of the driver board, that is, the temperature rise, is recorded at the same time; if the deviation of the forward and reverse running time and the temperature rise is within ±0.3%, the product is qualified. In terms of the number of samples, the percentage of products that meet the comparison range and the total number of samples is the consistency index percentage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a servo drive quality consistency detection device for sampling comparison in the present invention;

[0013] Figure 2 It is a structural schematic diagram of the S-type and 8-type extraction methods in the present invention. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0015] See also Figure 1 to Figure 2 As shown, a sampling comparison servo drive quality consistency detection system includes a motor test platform 1, a motor 2, a servo drive to be tested 3 and a hub 4; the motor 2 is located on the motor test platform 1; an equivalent load flywheel 6 is installed at one end of the motor shaft 5, and the power line 7 and the encoder signal line 8 on the motor 2 are respectively connected to the hub 4; a common power line 10 and a data output signal line 11 are neatly arranged under the base 9 of the motor test platform 1; the common power line 10 is externally connected to a power socket; the power socket 12 is connected to the hub 4; the power socket 4 is located at the motor test platform 1. The test platform 1 is on the motor test platform; one end of the data output signal line 11 extends to the upper side 1 of the motor test platform to form a data output interface 12; the bus of the data output interface 18 is connected to the hub 4; one side of the hub 4 has an output terminal, and the output terminal is divided into a strong current terminal 13 and a weak current terminal 14; the hub 4 is located on the motor test platform 1; a temperature sensor 15 is installed on the servo driver 3 to be tested to detect the heating condition of the driver board; the power line 16 of the servo driver 3 to be tested is connected to the strong current terminal 13, and the data signal line 17 is connected to the weak current terminal 14. In the hub, the encoder signal line and the data output signal line constitute the weak current terminal; the power line of the motor and the power socket connection constitute the strong current terminal.

[0016] A sampling and comparison servo drive quality consistency detection method, on a product detection conveyor 23, a product to be detected 3, which is a product, a motor and an inertia, is arranged as a whole in rows and columns to form a product matrix 19; each time a batch of products is changed for detection, the components are different but the positions are fixed; during detection, 20% and 40% sampling are adopted according to the number of products in the matrix; for 20% sampling, S-type extraction 20 is adopted; for 40% sampling, 8-shaped extraction 21 is adopted, and 22 is a power line.

[0017] S-type extraction is to form a product matrix with ten rows and five columns for the products to be tested on the product inspection conveyor, with a total of 50 products to be tested; the S-type starts with the product in the first row and third column, and ends with the product in the tenth row and third column. The starting and ending points are on a straight line, and the straight line is perpendicular to the product inspection conveyor; in S-type extraction, one product can be randomly selected from each row, and a total of 10 products are selected, that is, the number of extractions is 20% of the matrix of products to be tested on the product inspection conveyor.

[0018] The products to be tested for the 8-shaped extraction are an S-shaped extraction plus the previous S-shaped mirror extraction, and the two Ss are merged to form an 8-shaped shape; the 8-shaped extraction is divided into two parts, the first part is the S-shaped extraction, that is, the product starting from the third column of the first row and ending at the third column of the tenth row; the second part is the S-shaped mirror extraction, that is, the product starting from the third column of the first row and moving in the opposite direction of the S-shaped extraction, and ending at the third column of the tenth row; For the products to be tested for the 8-shaped extraction, 18 products to be tested are randomly selected. Since the starting and ending points are repeated twice, that is, the 8-shaped extraction, the accurate extraction rate is 36%.

[0019] When extracting the products to be tested, the S-type and 8-type are used alternately, that is, the first product matrix to be tested adopts the S-type extraction, and the second product matrix to be tested adopts the 8-type extraction.

[0020] Connect the data signal line of the product to be tested to the weak current wiring terminal, and the power line of the product to be tested to the strong current wiring terminal; connect the motor to 70% rated load, in [-n N ,n N ] range; the motor accelerates from 0 speed to rated speed n N， Then brake to -n N， The time of this cycle is T, and the temperature of the driver board temperature sensor of the product to be tested is recorded at the same time; if the forward and reverse running time and temperature rise deviation of the product to be tested are within ±0.3%, the product to be tested is qualified.

Claims

1. A sampling comparison servo drive quality consistency detection system, characterized by: The motor test platform comprises a motor, a servo driver to be tested and a hub; the motor is located on the motor test platform; an equivalent load flywheel is installed at one end of the motor shaft, and the power line and encoder signal line on the motor are respectively connected to the hub; a common power line and a data output signal line are neatly arranged under the base of the motor test platform; the common power line is connected to a power socket; the power socket is connected to the hub; The power socket is located on the motor test platform; One end of the data output signal line extends to the upper side of the motor test platform to form a data output interface; The bus of the data output interface is connected to a hub; one side of the hub is provided with output terminals, and the output terminals are divided into strong current wiring terminals and weak current wiring terminals; the hub is located above the motor test platform; a temperature sensor is installed on the servo driver to be tested; the power line of the servo driver to be tested is connected to the strong current wiring terminal, and the data signal line is connected to the weak current wiring terminal.

2. A sampling comparison servo drive quality consistency detection system according to claim 1, characterized in that In the hub, the encoder signal line and the data output signal line form a weak current wiring terminal; the power line of the motor and the power socket wiring form a strong current wiring terminal.

3. A sampling comparison servo drive quality consistency detection system according to claim 1, characterized in that The detection method is as follows: on the product detection conveyor table, the products are arranged as a whole in rows and columns to form a product matrix; during the detection, according to the number of products in the matrix, 20% and close to 40% of the samples are taken; for 20% sampling, S-type extraction is adopted; for sampling close to 40%, 8-type extraction is adopted.

4. A sampling comparison servo drive quality consistency detection system according to claim 3, characterized in that The product matrix has ten rows and five columns, and a total of 50 products to be tested form one matrix.

5. The servo drive quality consistency detection system of sampling comparison according to claim 3 is characterized in that The S-shaped extraction of the products to be tested on the product inspection conveyor table, the S-shaped starts at the products in the third column of the first row, and ends at the products in the third column of the tenth row, the starting and ending points are on a straight line, and the straight line is perpendicular to the product inspection conveyor table; in the S-shaped extraction, one product can be randomly selected from each row, and a total of 10 products to be tested are selected, which is 20% of the products to be tested on the product inspection conveyor table.

6. A sampling comparison servo drive quality consistency detection system according to claim 3, characterized in that The product to be tested in the 8-shaped extraction is an S-shaped extraction plus a previous S-shaped mirror extraction, and the two Ss are merged to form an 8-shaped shape; the 8-shaped extraction is divided into two parts, the first part is the S-shaped extraction, that is, the product starting from the third column of the first row and ending in the third column of the tenth row; the second part is the S-shaped mirror extraction, that is, the product starting from the third column of the first row and moving in the opposite direction of the S-shaped extraction, and ending in the third column of the tenth row; the products to be tested in the 8-shaped extraction, 18 products to be tested are randomly selected from the machine, and since the starting and ending of the pen are repeated twice, that is, the 8-shaped extraction, the accurate extraction rate is 36%.

7. The servo drive quality consistency detection system of sampling comparison according to claim 3 is characterized in that: When extracting the products to be tested, the S-type and 8-type are used alternately, that is, the first product matrix to be tested adopts the S-type extraction, and the second product matrix to be tested adopts the 8-type extraction.

8. The servo drive quality consistency detection system of sampling comparison according to claim 3 is characterized in that: Connect the data signal line of the product to be tested to the weak-current wiring terminal of the servo drive quality consistency detection device for sampling comparison, and connect the power line of the product to be tested to the strong-current wiring terminal; connect the motor to 70% of the rated load, and N ,n N ] range; the motor accelerates from 0 speed to rated speed n N， Then brake to -n N， The time of this cycle is T, and the temperature of the temperature sensor on the driving board of the product to be tested is recorded at the same time; if the forward and reverse running time and temperature rise deviation of the product to be tested are within ±0.3%, the product to be tested is qualified.

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