CN112327213B - Electric revolving body performance detection system and detection method - Google Patents
Electric revolving body performance detection system and detection method Download PDFInfo
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- CN112327213B CN112327213B CN202011117520.2A CN202011117520A CN112327213B CN 112327213 B CN112327213 B CN 112327213B CN 202011117520 A CN202011117520 A CN 202011117520A CN 112327213 B CN112327213 B CN 112327213B
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- 238000001514 detection method Methods 0.000 title claims abstract description 64
- 238000012360 testing method Methods 0.000 claims abstract description 112
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 58
- 238000007689 inspection Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000011056 performance test Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/55—Testing for incorrect line connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides an automatic detection system and method of an electric rotator, wherein the detection method is used for butting a test electric rotator with a plug-in connector on a test system when detecting the electric rotator according to a test program preset by a computer system, and starting the test system; under the condition that the electric gyrorotor actually drives a load, according to the voltage drop of the access voltage and the output voltage of the electric gyrorotor, the electric conduction performance test is automatically completed, and a test result is formed. Meanwhile, according to the comparison of the difference between the actual rotation angle of the electric rotating body measured by the testing system and the rotation angle measured by the electric rotating body angle sensor, the performance test of the rotation angle of the electric rotating body is automatically completed, and a test result is formed. The whole process is automatically detected, so that the detection efficiency is high, the detection parameter range is wide, the detection precision is high, and the operation is easy.
Description
Technical Field
The invention relates to a detection system and a detection method, in particular to an electric revolving body performance detection system and a detection method.
Background
The electric revolving body is used as a core part of engineering equipment such as a wheeled crane, an excavator, a high-altitude fire truck, a high-altitude operation platform and the like, is mainly used for transmitting electric signals and power supply to a running part and an operation part when the electric revolving body rotates (360 DEG at maximum), and can also be internally provided with an angle detection device for detecting the rotation angle.
Conventionally, after the assembly production of the electric rotating body is offline, whether upper and lower outgoing lines of corresponding channel serial numbers (such as1, 2,3 and the like) are conducted or not is measured one by one through a universal meter, the detection efficiency is low, faults such as installation size deviation of an internal transmission mechanism of the electric rotating body, installation dislocation of the upper and lower outgoing lines and the like are not easy to detect, after the electric rotating body is installed on engineering equipment, control failure is caused by overhigh voltage drop of a transmission line, faults such as line short circuit and inaccurate rotation angle detection are caused by wiring errors of a circuit transmission channel, engineering machinery product debugging period is restricted, and even the engineering equipment cannot work normally.
Disclosure of Invention
The invention aims to: the invention aims to provide an electric revolving body performance detection system and a detection method, which can rapidly detect wiring correctness of each transmission channel, voltage drop of electric transmission of each channel and accuracy of revolving detection, and automatically generate a detection report according to a detection value for quality control of the electric revolving body. Because the whole process is automatically detected, the detection efficiency is high, the detection variable range is wide, the detection precision is high, and the operation is easy.
The technical scheme is as follows: the invention relates to an electric revolving body performance detection system, which comprises a test bench, a test computer system, a test board card, a revolving angle sensor and a power supply, wherein the test bench is connected with the test computer system;
The test bench is provided with a driving motor and a test bench encoder; the driving motor is in butt joint with the electric rotating body, and in the testing process of the electric rotating body, the electric rotating body is driven to rotate according to the signals transmitted by the test board card, and the starting speed and the rotating angle can be controlled; the test bed encoder is used for measuring the actual rotation angle of the electric rotator;
The test computer system is used for collecting the electric revolving body performance data collected by the test bench encoder, finishing the signal processing, calculation, logic and judgment of the test result of the test system, and storing and outputting the test result and the electric revolving body performance data under the result;
the test board card is arranged in the test computer system and is used for integrally connecting the test board encoder, the rotary angle sensor, the electric revolving body, the driving motor and the test computer system, and transmitting collected data and control signals output by the test computer system;
The rotation angle sensor is arranged at the top of the electric rotator and is used for measuring the rotation angle of the electric rotator.
The control box is connected with the test computer system and comprises a main switch for controlling a working power supply of the test system, a safety device and a load capacity resistor for testing a transmission channel of the electric rotator.
The electric revolving body is connected with the load capacity resistor through the operation circuit connection plug connector.
The test bench encoder is connected with the test bench encoder in series, and the rotation angle sensor is connected with the rotation angle sensor in series.
The performance data comprise a set rotation angle alpha 0, a current rotation angle alpha 1 of the electric rotating body, a rotation angle alpha 2 of the electric rotating body, an electric transmission channel access voltage and an output voltage of the electric rotating body, and the number of the electric transmission channels related to the parameters. The data specifically includes the rotation angle of the electric rotator when the output voltage is minimum.
The invention relates to an automatic detection method for electric conduction performance of an electric revolving body, which is characterized by comprising the following steps of:
(1) Installing the electric gyrorotor on a test system, starting the test system and the electric gyrorotor, connecting a voltage V nin to an electric transmission channel n, and driving a load through the electric transmission channel n, wherein n is the number of the electric transmission channels of the electric gyrorotor;
(2) The driving motor drives the electric rotator to rotate according to a preset rotation angle alpha 0;
(3) The test system reads the access voltage V nin of the electric transmission channel n and the output voltage V nout of the electric transmission channel;
(4) And calculating the maximum difference between V nin and V nout, and judging whether the electric transmission voltage drop is excessive or not when the maximum difference is larger than a voltage drop threshold DeltaV allowed by the preset electric transmission channel of the system.
One or two of the following two methods are adopted for distinguishing each electric transmission channel:
(1) The access voltage values of the electric transmission channels are different, and the voltage value difference between the electric transmission channels is larger than the voltage drop threshold DeltaV allowed by the preset electric transmission channels of the system;
(2) Different energizing time is adopted, so that the time for driving the load by each electric transmission channel of the electric rotator is not overlapped.
The invention relates to an automatic detection method for the rotation angle performance of an electric rotating body, which is characterized by comprising the following steps of:
(1) The electric rotator is arranged on a test system, the test system and the electric rotator are started, and a driving motor drives the electric rotator to rotate according to a preset rotation angle alpha 0;
(2) The testing system reads a rotation angle alpha 1 of the electric rotating body driven by the current testing device and a rotation angle alpha 2 of the electric rotating body detected by the angle of the electric rotating body;
(3) And calculating the maximum difference between alpha 1 and alpha 2, and judging that the electric rotator is unqualified when the maximum difference is larger than the allowable error threshold delta alpha of the preset electric transmission channel of the system and the rotation angle detection error of the electric rotator is large.
The step (1) is preceded by the following steps: whether the rotation angle alpha 1 of the electric rotating body is larger than alpha 0 or not is judged in real time, when the rotation angle alpha 1≥α0 is reached, detection is automatically stopped, and the set value of alpha 0 is larger than or equal to 360 degrees.
The method further comprises the following steps: and storing and outputting the test result and all the performance data.
The beneficial effects are that: compared with the prior art, the invention has the following remarkable advantages:
(1) The automatic detection method and the automatic detection system for the electric revolving body can automatically detect wiring errors of the electric revolving body through the computer system, judge electric transmission quality according to voltage drop of each electric transmission channel when the electric revolving body is loaded, automatically detect the detection errors of the revolving angle, and automatically generate detection reports according to detection values for controlling the quality of the electric revolving body;
(2) The automatic detection method and the automatic detection system for the electric rotator are automatically completed in the whole process, and have the advantages of high detection efficiency, wide detection variable range, high detection precision, low requirements on skills and responsibility of detection personnel, simple operation, easy popularization and easy subsequent improvement on the electric rotator.
Drawings
FIG. 1 is a schematic diagram of an electric gyrorotor automatic inspection system of the present invention;
FIG. 2 is a schematic diagram of the wiring of the automatic electric gyrorotor inspection system of the present invention;
Fig. 3 is a main flow chart of an electric conduction performance automatic detection program of the electric gyrorotor automatic detection method of the present invention.
Fig. 4 is a main flow chart of the turning angle performance automatic detection program of the electric turning body automatic detection method of the present invention.
Reference numerals illustrate:
1: an electric rotator; 2: a computer display; 3: a test bench; 4: a computer host; 5: testing the board card; 6: a control box; 7: a test bed encoder; 8: a driving motor; 151: an electrical slip ring; 152: a rotation angle sensor; 153: a brush; 154: a shifting fork; 155: the electric revolving body is connected with the running circuit through a plug connector; 156: the electric revolving body is connected with the operation circuit through a plug connector; 611: a power switch (circuit breaker); 612: an AC/DC transformer; 653: electrically conducting the drive relay; 663: electrically conducting the driving insurance; 616: safety of the driving motor; 617: safety of the encoder of the test board; 618: the rotation angle sensor is ensured; 673: a load carrying capacity resistor; 691: a communication bus.
Detailed Description
Fig. 1 is a schematic installation diagram of an electric rotating body automatic detection system according to the present embodiment.
A driving motor 8 and a test bed encoder 7 are arranged in the test bed 3. The electric rotator 1 is arranged on the table top of the test bench 3 and is connected with the control box 6 through an electric rotator and driving circuit connecting plug-in piece 155 and an electric rotator and operation circuit connecting plug-in piece 156. The driving motor 8 can drive the electric rotator 1 to rotate through the shifting fork 154 under the control of the control box 6, and the motor can enable the electric rotator 1 to rotate according to 10s-120s/r through a speed reducing mechanism of the motor; the test bed encoder 7 is used for measuring the actual rotation angle of the electric rotator 1, and in this embodiment, a 360 ° absolute value type encoder is selected and output as a bus type signal.
The computer display 2 is used for displaying test values and test results; the computer host 4 is internally provided with a test program, 2 test boards 5 are arranged at the expansion ports of the computer host 4, and the test boards 5 have the functions of signal detection input and control signal output so as to connect the computer host 4 with the control box 6.
After the tester starts the testing device, each electric transmission channel is connected to a power supply through an electric rotator and a driving circuit connecting plug-in unit 155, and the load capacity resistor 673 in the control box 6 is driven through the electric rotator and a working circuit connecting plug-in unit 156 by utilizing the sliding connection between the electric slip ring 151 and the electric brush 153.
The electric rotating body 1 has a rotation angle sensor 152 capable of detecting a 360 ° rotation angle of the electric rotating body 1. The revolution angle sensor 152 is mounted on the top of the electric revolution body 1, the rotation shaft of which rotates together with the electric slip ring 151, and the housing moves together with the brush 153. When the driving motor 8 drives the electric rotator 1 to rotate through the fork 154, the rotation angle sensor 152 can detect the rotation angle of the electric rotator 1. In the present embodiment, the rotation angle sensor 152 detects 360 ° in the range, and the absolute value encoder outputs a bus type signal. In the present embodiment, the electric rotator 1 has 15 electric transmission channels, each channel has 1 electric slip ring 151 and brushes 153, and each electric transmission channel can achieve rated driving capability.
The access voltage V nin of the electric transmission channel n collected by the test system is the access power supply voltage of the electric rotator and the driving circuit connecting plug-in unit 155, and the output voltage V nout of the electric transmission channel is the output voltage of the electric rotator and the operation circuit connecting plug-in unit 156.
In this embodiment, the computer system sets the revolution detection error threshold Δv allowed by the tested electric revolution body to 100mA in advance. And when the maximum difference between V nin and V nout is larger than the voltage drop threshold value 100mA allowed by the preset electric transmission channel, the electric transmission voltage drop is too high, and the judgment is failed.
In the embodiment, the test system reads a rotation angle alpha 1 of the electric rotating body driven by the current test device and a rotation angle alpha 2 of the electric rotating body detected by the self angle of the electric rotating body; in this embodiment, the maximum difference is set to 0.1 ° greater than the voltage drop threshold Δα allowed by the system preset electrical transmission path. When the maximum difference between alpha 1 and alpha 2 is larger than 0.1 degrees, the detection error of the revolution angle of the electric revolution body is large, and the judgment is failed.
Fig. 2 is a schematic diagram of the wiring of the automatic detection system for electric gyrorotor according to an embodiment of the present invention. The 220V AC power supply supplies power to the computer display 2, the computer host 4, the AC/DC transformer 612 through the power switch (or breaker) 611, and the AC/DC transformer 612 converts the 220V AC into 24V DC to supply power to the sensors, motors, etc. of the detection system.
The test board 5 is installed in the computer host 4, and the computer host 4 supplies power. The output port of the control electric transmission channel n of the test board 5 is connected in series with the relay 653 control coil of the electric conduction driving n. The normally open contact of relay 653 is connected in series with electrically conductive drive safety 663, electric gyrator 1, and load carrying capacity resistor 673. When the driving capability of the electric conduction driving n is tested, the output port of the control electric transmission channel n of the test board 5 outputs a high level, the coil of the relay 653 is electrified, the contacts 30 and 87 of the relay 653 are closed, and the load capacity resistor 673 is electrified. The output port of the test board 5 controlling the rotation of the drive motor 8 is connected in series with the control coil of the relay 615. The normally open contact of the relay 615 is connected in series with the safety 616 of the drive motor 8 and the drive motor 8.
When the test electric conduction driving n driving capability or the rotation angle sensor detects errors, the output port of the control driving motor 8 of the test board card 5 outputs high level, the coil of the relay 615 is electrified, the contacts 30 and 87 of the relay 615 are closed, and the driving motor 8 is electrified to rotate.
The test bed encoder 7 is connected in series with the test bed encoder safety 617, and when the driving motor 8 drives the electric rotator 1 to rotate, the actual rotation angle of the electric rotator 1 is measured.
The rotation angle sensor 152 is connected in series with the rotation angle sensor safety 618, when the driving motor 8 drives the electric rotation body 1 to rotate, the shaft of the rotation angle sensor 152 is driven to rotate, the rotation angle is generated, and the detection error of the rotation angle sensor 152 is judged by comparing the difference between the actual rotation angle of the electric rotation body 1 measured by the test bench encoder 7 and the measured angle of the rotation angle sensor 152.
In the present embodiment, the test board 5, the test bed encoder 7, and the rotation angle sensor 152 are connected via the communication bus 691 to perform CAN bus communication.
Fig. 3 is a main flow chart of an electrical conduction performance automatic detection program of an electrical gyrorotor automatic detection method according to an embodiment of the present invention, and in this embodiment, the program is mainly completed in the host computer 4. Mainly comprises the following steps:
first, the main computer 4 reads the current electric rotating body rotation angle α n and the set rotation angle α 0 (step S402). Specifically, the current electric rotating body rotation angle α n is the current electric rotating body 1 rotation angle measured by the test table encoder 7, and the set rotation angle α 0 is the maximum rotation angle of the test system set electric rotating body 1.
Next, it is determined whether or not electric rotating body rotation angle α n is greater than α 0 (step S403). Specifically, if α n is greater than α 0, indicating that the drive motor 8 has driven the electric rotating body 1 beyond a specified angle, the test has been completed; if α n is not greater than α 0, it means that the driving motor 8 drives the electric rotator 1 to not reach more than a specified angle, and the driving motor 8 needs to continue to operate.
Again, the motor is operated, the electric gyrorotor is rotated, the relay is energized, and the channel is loaded (step S404). Specifically, when the nth electrical conductivity is automatically detected, the output port of the control electrical transmission channel n of the test board 5 outputs a high level, the coil of the relay 653 is electrified, the contacts 30 and 87 of the relay 653 are closed, and the load capacity resistor 673 is electrified.
Fourth, the read channel n is connected to the voltage V nin, and outputs the minimum voltage V nout (step S405). Specifically, the access voltage V nin of the electrical transmission channel n collected by the test system is the access power voltage of the electrical rotator and the driving circuit connecting plug-in unit 155, and the output voltage V nout of the electrical transmission channel is the output voltage of the electrical rotator and the operation circuit connecting plug-in unit 156.
Fifth, the maximum difference between V nin and V nout is calculated, and it is determined whether the maximum error exceeds the allowable limit Δv after the electric transmission channel n is loaded (step S406).
Specifically, when the maximum difference is greater than the voltage drop threshold Δv allowed by the system preset electrical transmission channel, the electrical transmission voltage drop is too high, and the electrical conductivity of the channel n is determined to be unqualified (step S408); when the maximum difference is not greater than the voltage drop threshold Δv allowed by the system preset electrical transmission channel, the electrical transmission voltage drop is too high, and the electrical conductivity of the channel n is judged to be qualified (step S407).
Finally, the channel numbers, the access voltage V nin, and the output minimum voltage V nout are recorded (step S409). Specifically, the method records the channel numbers, the access voltage V nin and the output minimum voltage V nout, and further comprises the information such as the rotation angle of the current electric rotator 1, the calculation result of V nin-Vnout and the like measured by the test bench encoder 7 when the minimum voltage V nout is output, and the information is used for testing, evaluating and subsequently improving the unqualified products, and analyzing the reasons for unqualified electric rotators by recording the rotation angle of the unqualified electric rotators under the minimum voltage.
Next, a main flow of the turning angle performance automatic detection routine according to the embodiment of the present invention will be described with reference to fig. 4. Fig. 4 is a main flow chart of a turning angle performance automatic detection program of an electric turning body automatic detection method according to an embodiment of the present invention, and in this embodiment, the program is mainly completed in the computer host 4. Mainly comprises the following steps:
First, the test system controls the motor to start and the electric rotator to rotate (step S462). Specifically, the computer host 4 communicates through a bus to enable the output port of the test board card 5, which controls the driving motor 8, to output a high level, the coil of the relay 615 is powered on, the contacts 30 and 87 of the relay 615 are closed, the driving motor 8 is powered on to rotate, and then the electric rotator 1 is driven to rotate.
Next, the current electric rotating body rotation angle α n is read, and the rotation angle α 0 is set (step S463). Specifically, the test bed encoder 7 measures the current electric rotating body 1 rotation angle α n, and the set rotation angle α 0 is the maximum rotation angle of the test system set electric rotating body 1.
Third, it is determined whether or not the electric rotator rotation angle α n is greater than α 0 (step S464). Specifically, if α n is greater than α 0, indicating that the drive motor 8 has driven the electric rotating body 1 beyond a specified angle, the test has been completed; if α n is not greater than α 0, it means that the driving motor 8 drives the electric rotator 1 to not reach more than a specified angle, and the driving motor 8 needs to continue to operate.
Fourth, the rotation angle α 1 of the current testing device and the rotation angle α 2 of the electric rotator are read (step S404). Specifically, α 1 is a measurement of the test bed encoder 7, and α 2 is a measurement of the rotation angle sensor 152.
Fifth, it is judged whether the maximum difference between the calculated α 1 and α 2 exceeds the allowable boundary value Δα (step S466).
Specifically, when the maximum difference between α 1 and α 2 is greater than the error threshold Δα allowed for detection of the rotation angle preset by the system, the rotation angle detection error exceeds the allowed range, and it is determined that the rotation angle detection performance is not acceptable (step S468); when the maximum difference between α 1 and α 2 is not greater than the error threshold Δα allowed for the detection of the rotation angle preset in the system, the rotation angle detection error is within the allowed range, and it is determined that the rotation angle detection performance is acceptable (step S467).
Finally, the maximum difference between the record angle detection α 1 and α 2 is recorded (step S469). Specifically, the recorded value includes information such as the maximum difference between α 1 and α 2, the value of α 1 at this time, and the value of α 2 at this time.
Claims (6)
1. The electric revolving body performance detection system is characterized by comprising a test bench, a test computer system, a test board card, a revolving angle sensor, a driving circuit connection plug connector, an operation circuit connection plug connector, a control box and a power supply;
The test bench is provided with a driving motor and a test bench encoder; the driving motor is in butt joint with the electric rotating body, and in the testing process of the electric rotating body, the electric rotating body is driven to rotate according to the signals transmitted by the test board card, and the starting speed and the rotating angle can be controlled; the test bed encoder is used for measuring the actual rotation angle of the electric rotator;
The test computer system is used for collecting the electric revolving body performance data collected by the test bench encoder, finishing the signal processing, calculation, logic and judgment of the test result of the test system, and storing and outputting the test result and the electric revolving body performance data under the result;
the control box is connected with the test computer system and comprises a main switch for controlling a working power supply of the test system, a safety device and a load capacity resistor for testing a transmission channel of the electric rotator;
The test board card is arranged in the test computer system and is used for integrally connecting the test board encoder, the rotary angle sensor, the electric revolving body, the driving motor and the test computer system, and transmitting collected data and control signals output by the test computer system; the electric transmission channel of the electric rotating body is connected with the plug connector through the driving circuit, and the electric rotating body is connected with the carrying capacity resistor through the operation circuit and connected with the test board card;
The rotation angle sensor is arranged at the top of the electric rotator and is used for measuring the rotation angle of the electric rotator.
2. The electric gyrorotor performance inspection system of claim 1, further comprising a test bed encoder safety and a gyratory angle sensor safety, the test bed encoder being in series with the test bed encoder safety, the gyratory angle sensor being in series with the gyratory angle sensor safety.
3. The electric rotating body performance detection system according to claim 1, wherein the performance data comprises a set rotation angle α 0, a current electric rotating body rotation angle α 1, a rotation angle α 2 of the electric rotating body detected by the angle thereof, an electric transmission channel access voltage and an output voltage of the electric rotating body, and the number of electric transmission channels.
4. An automatic detection method for electric conduction performance of an electric rotating body is characterized by comprising the following steps of:
(1) Installing the electric gyrorotor on a test system, starting the test system and the electric gyrorotor, connecting a voltage V nin to an electric transmission channel n, and driving a load through the electric transmission channel n, wherein n is the number of the electric transmission channels of the electric gyrorotor;
(2) The driving motor drives the electric rotator to rotate according to a preset rotation angle alpha 0;
(3) The test system reads the access voltage V nin of the electric transmission channel n and the output voltage V nout of the electric transmission channel;
(4) And calculating the maximum difference between V nin and V nout, and judging whether the electric transmission voltage drop is excessive or not when the maximum difference is larger than a voltage drop threshold DeltaV allowed by the preset electric transmission channel of the system.
5. The method for automatically detecting electrical conductivity of an electric rotating body according to claim 4, wherein one or both of the following two methods are adopted for distinguishing each electric transmission channel:
(1) The access voltage values of the electric transmission channels are different, and the voltage value difference between the electric transmission channels is larger than the voltage drop threshold DeltaV allowed by the preset electric transmission channels of the system;
(2) Different energizing time is adopted, so that the time for driving the load by each electric transmission channel of the electric rotator is not overlapped.
6. An automatic detection method for the rotation angle performance of an electric rotating body is characterized by comprising the following steps of:
(1) The electric rotator is arranged on a test system, the test system and the electric rotator are started, and a driving motor drives the electric rotator to rotate according to a preset rotation angle alpha 0;
(2) The testing system reads a rotation angle alpha 1 of the electric rotating body driven by the current testing device and a rotation angle alpha 2 of the electric rotating body detected by the angle of the electric rotating body;
(3) And calculating the maximum difference between alpha 1 and alpha 2, and judging that the electric rotator is unqualified when the maximum difference is larger than the allowable error threshold delta alpha of the preset electric transmission channel of the system and the rotation angle detection error of the electric rotator is large.
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