System and method for automatically measuring load torque of transmission mechanism

Abstract

The invention relates to the technical field of motor transmission mechanism load torque measurement, in particular to an automatic measurement system and an automatic measurement method for transmission mechanism load torque, which are particularly suitable for automatic measurement of transmission mechanism orientation or pitching load torque before equipment assembly and in debugging and inspection processes. The device comprises a mounting platform, a detection device, a test cable and a detection control box, the detection device is fixed on the mounting platform, and the detection control box is connected with the detection device through the test cable to complete load torque measurement. According to the invention, the azimuth or pitching load moment of the equipment transmission mechanism can be automatically measured before assembly, during debugging and inspection, so that the detection efficiency is improved; according to the method, whether the azimuth or pitching load torque of the transmission mechanism meets the technical index requirement or not is intelligently judged, the measurement error is reduced, and the measurement method can be popularized to products with similar mechanisms and has certain popularization value.

Description

Technical Field

[0001] The present invention relates to the technical field of load torque measurement of a motor transmission mechanism, and in particular to an automatic measurement system and method for the load torque of a transmission mechanism. Background Art

[0002] With the development of science and technology, DC motors are widely used in various transmission mechanisms in scientific research and production practice to provide equipment with the ability to move in pitch or azimuth. The torque of a DC motor, as an important parameter of the motor's load-bearing capacity, is one of the main assessment indicators for the design and engineering of a transmission mechanism. The application of a DC motor provides power for the movement of the transmission mechanism. Designing or selecting a DC motor with a suitable torque is the premise for ensuring the safe movement of the transmission mechanism in the azimuth or pitch direction, ensuring that the DC motor can meet the load requirements and minimize the power and volume of the motor, ensuring that the safety, reliability and stability of the movement in the azimuth or pitch direction can be guaranteed while reducing the volume and weight of the transmission mechanism. When designing a transmission mechanism, an azimuth or pitch motor that meets the use requirements will be selected according to the load conditions of the azimuth or pitch. When debugging and accepting the transmission mechanism, the load torque will be measured from the output shaft end of the motor, that is, the input end of the reduction mechanism, to check whether the load torque of the transmission mechanism meets the index requirements, and also to ensure that the motor can drive the transmission mechanism to perform azimuth or pitch operation under the rated torque. In the prior art, the load torque measurement of the equipment transmission mechanism often relies on manual operation and traditional measurement methods, which have problems such as low measurement accuracy, low efficiency, and large errors, and cannot meet the needs of modern industry for high-precision and automated measurement. The original transmission mechanism azimuth or pitch load torque measurement is manually tested. The test method is: with the help of a tool at the input port of the azimuth or pitch reduction mechanism, use a spring scale to pull the load along the tangent direction of the rotating circle, record the maximum reading F of the spring scale (unit converted to Newton), and then measure the rotation radius R of the tool (unit converted to meters) as the lever arm, then the load torque T=F×R, measure three times, and take the maximum value. This measurement method requires the production of tooling, has low measurement efficiency, and the spring scale must read the instantaneous maximum value during measurement, and the reading error is large, so the measurement error is large. Since the load torque of the transmission mechanism is its main technical indicator, each set of transmission mechanisms must be measured, especially in high and low temperature environments. It is even more difficult to measure. In order to improve measurement efficiency and reduce measurement errors, there is an urgent need for an automatic measurement system for the load torque of the transmission mechanism to automatically detect the load torque of the transmission mechanism. The measurement system has a simple structure, strong operability, light weight, and small space occupation, providing a strong guarantee for the safe and reliable operation of the azimuth or pitch of the transmission mechanism. Summary of the invention

[0003] In order to solve the problems of low efficiency and large measurement error in transmission mechanism load torque measurement, the present invention provides a simple, accurate and fast transmission mechanism load torque automatic measurement system, which is particularly suitable for automatic measurement of transmission mechanism azimuth or pitch load torque before equipment assembly, debugging and inspection.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an automatic measurement system for the load torque of a transmission mechanism, including an installation platform, a detection device, a test cable and a detection control box. The detection device is fixed on the installation platform, and the detection control box is connected to the detection device through a test cable to measure the load torque.

[0005] The detection device includes a simulated load, a reducer, a coupling and a motor, wherein one end of the reducer is connected to the simulated load and fixed on a mounting platform; the other end of the reducer is connected to the motor through a coupling, and the motor and the reducer shaft are concentric; the motor is fixed on the mounting platform.

[0006] The detection control box body integrates a power supply unit, a data acquisition unit, a data processing unit and a human-computer interaction unit; the power supply unit supplies power to the data acquisition unit; the data acquisition unit is connected to the detection device through a test cable, and the data acquisition unit is also connected to a data processing unit, and the data processing unit is connected to the human-computer interaction unit; the data acquisition unit collects data and transmits it to the data processing unit, and the data processing unit transmits the data processing results to the human-computer interaction unit.

[0007] The data acquisition unit includes a current sensor, a voltage sensor and a speed sensor; the current sensor, voltage sensor and speed sensor are respectively connected to the detection device through test cables; after the detection device is powered on, the current sensor, voltage sensor and speed sensor respectively send the current, voltage and speed values ​​of the detection device to the data processing unit through the RS422 serial port.

[0008] The power supply unit includes an AC / DC power management unit, a DC / DC conversion unit and a power protection unit; the circuit protection unit is used for output overvoltage and short circuit protection, input undervoltage and overvoltage protection, and overtemperature protection. The external AC220V voltage is converted into a DC12V power supply by the circuit protection unit through the AC / DC power management unit, and then after DC / DC conversion, it supplies power to subsequent control devices.

[0009] The data processing unit reads and processes the data of the data acquisition unit and performs display control on the human-computer interaction unit; the microprocessor of the data processing unit adopts the STM32F103C8T6 chip, the data acquisition unit is connected to the serial port of the STM32F103C8T6 through the interface chip, and reads and processes the data of the data acquisition unit; the human-computer interaction unit is connected to the serial port of the STM32F103C8T6. The human-machine interaction unit is installed on the front panel of the detection control box, and a TFT-LCD liquid crystal screen is used to realize human-machine interaction. The core processing unit of the liquid crystal screen of the human-machine interaction unit is a display and control module. The display and control module is connected to the data processing unit by a UART serial interface. The data acquisition unit collects electrical signals of current, voltage and rotation speed and transmits them to the data processing unit for analysis and processing; the data processing unit calculates the load torque of the transmission mechanism according to the formula and controls the display of the display screen. Its microprocessor adopts STM32F103C8T6, the sensor data is connected to the serial port of the microprocessor through an interface chip, and the display screen is connected to the UART1 port of the microprocessor.

[0010] The detection device includes a simulated load, a reducer, a coupling and a motor, one end of the reducer is connected to the simulated load and fixed on the mounting platform; the other end of the reducer is connected to the motor through a coupling, and the motor and the reducer shaft are concentric; the motor is fixed on the mounting platform; the detection control box body is integrated with a power supply unit, a data acquisition unit, a data processing unit and a human-computer interaction unit; the power supply unit supplies power to the data acquisition unit; the data acquisition unit is connected to the detection device through a test cable, and the data acquisition unit is also connected to a data processing unit, and the data processing unit is connected to the human-computer interaction unit; the data acquisition unit collects data and transmits it to the data processing unit, and the data processing unit transmits the data processing results to the human-computer interaction unit; the data acquisition unit includes a current sensor, a voltage sensor and a speed sensor; the current sensor, the voltage sensor and the speed sensor are respectively connected to the detection device through a test cable; after the detection device is powered on, the current sensor, the voltage sensor and the speed sensor respectively send the current, voltage and speed values ​​of the detection device to the data processing unit through the RS422 serial port; the power supply unit includes an AC / DC power management unit, a DC / DC The circuit protection unit is used for output overvoltage and short-circuit protection, input undervoltage and overvoltage protection, and overtemperature protection. The external AC220V voltage is converted into a DC12V power supply by the circuit protection unit through the AC / DC power management unit, and then powered by the subsequent control equipment after DC / DC conversion. The data processing unit reads and processes the data of the data acquisition unit and performs display control on the human-computer interaction unit. The microprocessor of the data processing unit adopts the STM32F103C8T6 chip. The data acquisition unit is connected to the serial port of the STM32F103C8T6 through the interface chip to read and process the data of the data acquisition unit. The human-computer interaction unit is connected to the The human-machine interaction unit is installed on the front panel of the detection control box, and a TFT-LCD liquid crystal screen is used to realize human-machine interaction. The core processing unit of the liquid crystal screen of the human-machine interaction unit is a display and control module. The display and control module is connected to the data processing unit by a UART serial interface. The data acquisition unit collects the electrical quantity signals of current, voltage and rotation speed and transmits them to the data processing unit for analysis and processing. The data processing unit calculates the load torque of the transmission mechanism according to the formula and controls the display of the display screen. The microprocessor thereof adopts STM32F103C8T6, the sensor data is connected to the serial port of the microprocessor through an interface chip, and the display screen is connected to the UART1 port of the microprocessor.

[0011] A measuring method of an automatic measuring system for load torque of a transmission mechanism comprises the following steps: Step 1, determining a simulated load 2 of the azimuth or pitch according to the load requirement of the transmission mechanism in the azimuth or pitch; Step 2: Design the installation platform according to the installation form of the reducer, motor and simulated load; Step 3: Connect the detection device to the installation platform; connect the detection control box to the detection device through a test cable; Step 4: Power on the automatic measurement system. The data acquisition unit collects the current, voltage, and speed values ​​transmitted by the current sensor, voltage sensor, and speed sensor, and sends them to the data processing unit. The data processing unit records the current value, voltage value, and speed value. The data processing unit calculates the load torque of the transmission mechanism according to the following formula: T=9549P / N; P=UI; Where: T is torque, unit: Nm; P is the power of the motor, unit: kW; N is the motor speed, unit: r / min; U is the motor input voltage, unit: V; I is the motor input current, unit: A; The calculation result is sent to the display unit of the human-computer interaction unit through the serial port and displayed on the touch screen of the display unit.

[0012] In the step three, the connection of the detection device includes the following steps: first, the output shaft of the reducer is connected to the output gear, the reducer is connected to the simulated load through the output gear, and then the reducer is connected to the mounting platform and the screw tightness is checked; next, the coupling is installed on the input shaft of the reducer without tightening it first, and then the other end of the coupling is connected to the motor, and the screws at both ends of the coupling are tightened; and the motor is connected to the mounting platform and the screws are checked to see if they are completely tightened; the integration of the detection control box includes installing the power supply unit, the human-computer interaction unit, the current sensor, the voltage sensor, the speed sensor, the data acquisition unit and the data processing unit in the detection control box body.

[0013] Beneficial effects: 1. The present invention can automatically measure the azimuth or pitch load moment of the equipment transmission mechanism before assembly, debugging and inspection, thereby improving the detection efficiency.

[0014] 2. The data acquisition unit, data processing unit and human-computer interaction unit of the present invention are used in combination to intelligently determine whether the azimuth or pitch load moment of the transmission mechanism meets the technical index requirements, thereby reducing measurement errors. 3. The measuring method used in the patent of this invention can be extended to products with similar mechanisms and has certain promotion value. The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is the principle diagram of the system of the present invention; Figure 2 It is a block diagram of the detection control box of the present invention; Figure 3 It is a schematic diagram of the detection device of the present invention; Figure 4 It is a schematic diagram of the human-computer interaction interface of the present invention.

[0017] In the figure: 1. Installation platform; 2. Simulated load; 3. Reducer; 4. Coupling; 5. Motor; 6. Test cable; 7. Detection control box; 8. Current sensor; 9. Voltage sensor; 10. Speed ​​sensor; 11. Data processing unit; 12. Power supply unit; 13. Human-computer interaction unit; 14. Display unit. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] according to Figure 1-Figure 4 The automatic measurement system of the load torque of a transmission mechanism shown includes an installation platform 1, a detection device, a test cable 6 and a detection control box 7. The detection device is fixed on the installation platform 1, and the detection control box 7 is connected to the detection device through the test cable 6 to measure the load torque.

[0020] Further, such as Figure 3As shown, the detection device includes a simulated load 2, a reducer 3, a coupling 4 and a motor 5; one end of the reducer 3 is connected to the simulated load 2 and fixed on the mounting platform 1, and the other end of the reducer 3 is connected to the motor 5 through the coupling 4, and the motor 5 is concentric with the axis of the reducer 3, and the motor 5 is fixed on the mounting platform 1, and the coupling 4 is respectively fastened to the reducer 3 and the motor 5 by screws. The processing of the mounting platform must ensure the coaxiality requirements of the motor 5 and the reducer 3. The reducer 3 is an azimuth reducer or a pitch reducer, and the motor 5 is an azimuth motor or a pitch motor.

[0021] The mounting platform 1 is designed and installed according to the installation form of the reducer 3, the motor 5 and the simulated load 2, so as to reliably connect and fix the reducer 3, the motor 5 and the simulated load 2 used in the transmission mechanism to ensure the stability of the measurement system; the azimuth or pitch simulated load 2 is determined according to the load requirements of the azimuth or pitch of the transmission mechanism to meet the measurement requirements under different working conditions.

[0022] Further Figure 1 and Figure 2 As shown, the detection control box 7 integrates a power supply unit 12, a data acquisition unit, a data processing unit 11 and a human-computer interaction unit 13 inside the box; the power supply unit 12 supplies power to the data acquisition unit; the data acquisition unit is connected to the detection device through a test cable 6, and the data acquisition unit is also connected to a data processing unit 11, and the data processing unit 11 is connected to the human-computer interaction unit 13; the data acquisition unit collects data and transmits it to the data processing unit 11, and the data processing unit 11 transmits the result to the human-computer interaction unit 13 after processing the data, and the detection control box 7 is connected to the motor 5 through a cable 6, and the data information interaction between the two uses a serial port bus for data transmission.

[0023] Furthermore, the main function of the data acquisition unit is to automatically collect electrical signals of current, voltage and speed and send these signals to the data processing unit 11 through the RS422 serial port for analysis and processing; the data acquisition unit includes a current sensor 8, a voltage sensor 9 and a speed sensor 10; the current sensor 8, the voltage sensor 9 and the speed sensor 10 are connected to the detection device through a test cable 6; after the detection device is powered on, the three sensors can send the current, voltage and speed values ​​of the detection device to the data processing unit 11 through the RS422 serial port.

[0024] Furthermore, the current sensor 8 converts the motor working current signal into an analyzable signal based on electromagnetic induction and Hall effect, the voltage sensor 9 uses the resistance voltage division principle to sense the voltage of the motor under test and convert it into an output signal, and the speed sensor 10 converts the motor speed into a pulse signal output for collection by the data acquisition unit.

[0025] Furthermore, the power supply unit 12 is externally powered by a power board to achieve voltage conversion, boost, buck, rectification, filtering, and voltage stabilization to provide DC 12V, 5V, and 3.3V working power supplies; it is converted into the required power supply through a switching power supply, and then powered for subsequent control equipment after conversion, including an AC / DC power management unit, a DC / DC conversion unit, and a power protection unit. The circuit protection unit is used for output overvoltage, short circuit protection, input undervoltage, overvoltage protection, and over-temperature protection. The power supply unit is externally connected to AC220V±20% / 50Hz power supply, and the voltage is converted into DC12V power supply by the circuit protection unit through the AC / DC power management unit, and then powered for subsequent control equipment after DC / DC conversion to ensure stable operation of the measurement system.

[0026] Furthermore, the data processing unit 11 reads and processes the data of the data acquisition unit, and performs display control on the human-computer interaction unit 13; the microprocessor of the data processing unit 11 adopts STM32F103C8T6, and the data acquisition unit is connected to the serial port of STM32F103C8T6 through an interface chip to read and process the data of the data acquisition unit; the human-computer interaction unit 13 is connected to the serial port of STM32F103C8T6, and performs display control on the human-computer interaction unit 13.

[0027] The main function of the data processing unit 11 is to read and process the information of the data acquisition unit and to perform display control on the human-computer interaction unit 13; the data processing unit 11 calculates the load torque of the transmission mechanism according to a specific formula and controls the display of the display unit 14. The microprocessor uses the STM32F103C8T6 chip. The data of the data acquisition unit is connected to the serial port of the microprocessor through the interface chip, and the human-computer interaction unit 13 is connected to the serial port of the STM32F103C8T6. The STM32F103C8T6 provides three 12-bit A / D converters. The ADC1-ADC3 converters are used for the current, voltage, and speed power acquisition of the motor. The collected power signal is 12V, and the system voltage is 3.3V. When measuring the power signal, the collected voltage value must first be divided by a resistor and then connected to the ADC1 channel of the STM32F103C8T6 to ensure that the data processing unit 11 accurately obtains data for calculation.

[0028] The chip is a single-chip microcomputer with ARM CortextM3 as the core, integrating a very rich set of on-chip peripherals, such as watchdog, timer, GPIO port, ADC, UART serial port, etc., which can fully meet the needs. The RS422 of the sensor is connected to the serial port of STM32F103C8T6 through the interface chip, and the TxD0 and RxD0 of the display are directly connected to the UART1 port of STM32F103C8T6.

[0029] Furthermore, the human-computer interaction unit 13 is installed on the front panel of the detection control box 7, and a TFT-LCD liquid crystal screen is used to realize human-computer interaction. The core processing unit of the liquid crystal screen of the human-computer interaction unit 13 is the display and control module. The display and control module is connected to the data processing unit 11 by a UART serial interface. The data acquisition unit collects the electrical signals of current, voltage, and speed and transmits them to the data processing unit 11 for analysis and processing; the data processing unit 11 calculates the load torque of the transmission mechanism according to a specific formula and controls the display of the display screen. Its microprocessor uses STM32F103C8T6, and the sensor data is connected to the serial port of the microprocessor through an interface chip, and the display screen is connected to the UART1 port of the microprocessor.

[0030] like Figure 4 As shown, the display control module software of the human-computer interaction unit 13 sets several display sub-functions and communication protocols, and the data processing unit 11 uses the "function call" method through the serial port to realize the display of images and texts. The touch function is realized by first calculating the touch area coordinates by the display control module itself, and then sending the data to the data processing unit 11 through the serial port, so as to achieve the purpose of human-computer interaction.

[0031] Furthermore, the detection device includes a simulated load 2, a reducer 3, a coupling 4 and a motor 5, one end of the reducer 3 is connected to the simulated load 2 and fixed on the installation platform 1; the other end of the reducer 3 is connected to the motor 5 through the coupling 4, and the motor 5 is concentric with the axis of the reducer 3; the motor 5 is fixed on the installation platform 1, and the coupling 4, the reducer 3 and the motor 5 are fastened with screws; the detection control box 7 integrates a power supply unit 12, a data acquisition unit, a data processing unit 11 and a human-computer interaction unit 13; the power supply unit 12 supplies power to the data acquisition unit; the data acquisition unit is connected to the detection device through a test cable 6, and the data acquisition unit is also connected to a data acquisition unit. The data processing unit 11 is connected to the human-computer interaction unit 13; the data acquisition unit acquires data and transmits it to the data processing unit 11, and the data processing unit 11 transmits the data processing result to the human-computer interaction unit 13; the data acquisition unit includes a current sensor 8, a voltage sensor 9 and a speed sensor 10; the current sensor 8, the voltage sensor 9 and the speed sensor 10 are connected to the detection device through a test cable 6; after the detection device is powered on, the three sensors can send the current, voltage and speed values ​​of the detection device to the data processing unit 11 through the RS422 serial port; the power supply unit 12 includes an AC / DC power management unit, a DC / DC The circuit protection unit is used for output overvoltage, short circuit protection, input undervoltage, overvoltage protection, and overtemperature protection. The external AC220V voltage is converted into a DC12V power supply by the circuit protection unit through the AC / DC power management unit, and then powered by the subsequent control equipment after DC / DC conversion; the data processing unit 11 reads and processes the data of the data acquisition unit, and performs display control on the human-computer interaction unit 13; the microprocessor of the data processing unit 11 adopts the STM32F103C8T6 chip, and the data acquisition unit is connected to the serial port of the STM32F103C8T6 through the interface chip to read and process the data of the data acquisition unit; the human-computer interaction unit 13 is connected to the The human-machine interaction unit is installed on the front panel of the detection control box 7, and a TFT-LCD liquid crystal screen is used to realize human-machine interaction. The core processing unit of the liquid crystal screen of the human-machine interaction unit is the display and control module. The display and control module is connected to the data processing unit 11 by a UART serial interface. The data acquisition unit collects the electrical signals of current, voltage and speed and transmits them to the data processing unit 11 for analysis and processing. The data processing unit 11 calculates the load torque of the transmission mechanism according to a specific formula and controls the display of the display screen. The microprocessor thereof adopts STM32F103C8T6, and the sensor data is connected to the serial port of the microprocessor through an interface chip, and the display screen is connected to the UART1 port of the microprocessor.

[0032] Different from the above-mentioned embodiment, a measuring method of an automatic measuring system for load torque of a transmission mechanism comprises the following steps: Step 1: according to the load requirement of the transmission mechanism in azimuth or pitch, determine the simulated load 2 in azimuth or pitch; Step 2, design the installation platform 1 according to the installation form of the reducer 3, the motor 5, and the simulated load 2; Step 3: Connect the detection device to the installation platform 1; the detection control box is connected to the detection device via the test cable 6; Step 4: Power on the automatic measurement system. The data acquisition unit collects the current, voltage and speed values ​​transmitted by the current sensor 8, the voltage sensor 9 and the speed sensor 10, and sends them to the data processing unit 11. The data processing unit 11 records the current value, voltage value and speed value. The data processing unit 11 calculates the load torque of the transmission mechanism according to the following formula: T=9549P / N; P=UI; Where: T is torque, unit: Nm; P is the power of the motor, unit: kW; N is the motor speed, unit: r / min; U is the motor input voltage, unit: V; I is the motor input current, unit: A; The calculation result is sent to the display unit 14 of the human-computer interaction unit 13 through the serial port and displayed on the touch screen of the display unit 14.

[0033] In the step three, the connection of the detection device includes the following steps: first, the output shaft of the reducer 3 is connected to the output gear, the reducer 3 is connected to the simulated load 2 through the output gear, and then the reducer 3 is connected to the mounting platform 1 and the tightening of the screws is checked; next, the coupling 4 is installed on the input shaft of the reducer 3, without tightening it first, and then the other end of the coupling 4 is connected to the motor 5, and the screws at both ends of the coupling 4 are tightened; and the motor 5 is connected to the mounting platform 1 and the screws are checked to see if they are completely tightened; the integration of the detection control box includes installing the power supply unit 12, the human-computer interaction unit 13, the current sensor 8, the voltage sensor 9, the speed sensor 10, the data acquisition unit and the data processing unit 11 in the detection control box 7.

[0034] Implementation method: 1. Installation steps: Install the DC motor, reduction mechanism, simulated load, transmission gear and other components on the installation platform according to the design requirements, and connect the current sensor, voltage sensor, speed sensor and detection control box.

[0035] 2. Operation process: The operator inputs the measurement parameters and functional requirements through the human-computer interaction unit. The data acquisition unit collects the sensor data and transmits it to the data processing unit. The data processing unit calculates and displays the load torque results on the touch LCD screen.

[0036] Debugging and calibration: Debugging and calibration are performed before use to ensure the accuracy and stability of the sensor. The present invention can automatically measure the azimuth or pitch load moment of the equipment transmission mechanism before assembly, debugging, and inspection, thereby improving the detection efficiency. The present invention intelligently determines whether the azimuth or pitch load moment of the transmission mechanism meets the technical index requirements and reduces the measurement error. The measurement method used in the patent of the present invention can be extended to products with similar mechanisms, and has certain promotion value.

[0037] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0040] The above are only preferred embodiments of the present invention. The present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An automatic measurement system for load torque of a transmission mechanism, characterized in that: The device comprises a mounting platform (1), a detection device, a test cable (6) and a detection control box (7); the detection device is fixed on the mounting platform (1); the detection control box (7) is connected to the detection device via the test cable (6) to perform load torque measurement.

2. The automatic measurement system for load torque of a transmission mechanism according to claim 1, characterized in that: The detection device comprises a simulated load (2), a reducer (3), a coupling (4) and a motor (5); one end of the reducer (3) is connected to the simulated load (2) and fixed on the mounting platform (1); the other end of the reducer (3) is connected to the motor (5) via the coupling (4), and the motor (5) and the reducer (3) have concentric axes; the motor (5) is fixed on the mounting platform (1).

3. The automatic measurement system for load torque of a transmission mechanism according to claim 1, characterized in that: The detection control box (7) has a power supply unit (12), a data acquisition unit, a data processing unit (11) and a human-machine interaction unit (13) integrated inside the box; the power supply unit (12) supplies power to the data acquisition unit; the data acquisition unit is connected to the detection device via a test cable (6), and the data acquisition unit is also connected to a data processing unit (11), and the data processing unit (11) is connected to the human-machine interaction unit (13); the data acquisition unit acquires data and transmits it to the data processing unit (11), and the data processing unit (11) transmits the data processing result to the human-machine interaction unit (13).

4. The automatic measurement system for load torque of a transmission mechanism according to claim 3, characterized in that: The data acquisition unit comprises a current sensor (8), a voltage sensor (9) and a rotation speed sensor (10); the current sensor (8), the voltage sensor (9) and the rotation speed sensor (10) are respectively connected to the detection device via a test cable (6); after the detection device is powered on, the current sensor (8), the voltage sensor (9) and the rotation speed sensor (10) respectively send the current, voltage and rotation speed values ​​of the detection device to the data processing unit (11) via an RS422 serial port.

5. The automatic measurement system for load torque of a transmission mechanism according to claim 3, characterized in that: The power supply unit (12) comprises an AC / DC power management unit, a DC / DC conversion unit and a power protection unit; the circuit protection unit is used for output overvoltage and short circuit protection, input undervoltage and overvoltage protection, and overtemperature protection; an external AC220V voltage is converted into a DC12V power supply by the circuit protection unit through the AC / DC power management unit, and then after DC / DC conversion, it supplies power to subsequent control devices.

6. The automatic measurement system for load torque of a transmission mechanism according to claim 3, characterized in that: The data processing unit (11) reads and processes the data of the data acquisition unit, and performs display control on the human-machine interaction unit (13); the microprocessor of the data processing unit (11) adopts an STM32F103C8T6 chip, the data acquisition unit is connected to the serial port of the STM32F103C8T6 via an interface chip, and reads and processes the data of the data acquisition unit; the human-machine interaction unit (13) is connected to the serial port of the STM32F103C8T6.

7. The automatic measurement system for load torque of a transmission mechanism according to claim 6, characterized in that: The human-machine interaction unit (13) is installed on the front panel of the detection control box (7), and uses a TFT-LCD liquid crystal screen to realize human-machine interaction. The core processing unit of the liquid crystal screen of the human-machine interaction unit is a display control module. The display control module and the data processing unit (11) are connected via a UART serial interface. The data acquisition unit collects electrical signals of current, voltage and rotation speed and transmits them to the data processing unit (11) for analysis and processing. The data processing unit (11) calculates the load torque of the transmission mechanism according to a formula and controls the display of the display screen. The microprocessor thereof uses STM32F103C8T6. The sensor data is connected to the serial port of the microprocessor via an interface chip, and the display screen is connected to the UART1 port of the microprocessor.

8. The automatic measurement system for load torque of a transmission mechanism according to claim 1, characterized in that: The detection device comprises a simulated load (2), a reducer (3), a coupling (4) and a motor (5); one end of the reducer (3) is connected to the simulated load (2) and fixed on the mounting platform (1); the other end of the reducer (3) is connected to the motor (5) via the coupling (4), and the motor (5) and the reducer (3) are coaxial; the motor (5) is fixed on the mounting platform (1); a power supply unit (12), a data acquisition unit, a data processing unit (11) and a human-computer interaction unit (13) are integrated in the detection control box (7); the power supply unit (12) supplies power to the data acquisition unit; the data acquisition unit is connected to the detection device via a test cable (6), and the data acquisition unit is also connected to the data processing unit (11), and the data processing unit (11) ) is connected to the human-machine interaction unit (13); the data acquisition unit acquires data and transmits it to the data processing unit (11), and the data processing unit (11) transmits the data processing result to the human-machine interaction unit (13); the data acquisition unit comprises a current sensor (8), a voltage sensor (9) and a speed sensor (10); the current sensor (8), the voltage sensor (9) and the speed sensor (10) are respectively connected to the detection device via a test cable (6); after the detection device is powered on, the current sensor (8), the voltage sensor (9) and the speed sensor (10) respectively send the current, voltage and speed values ​​of the detection device to the data processing unit (11) via the RS422 serial port; the power supply unit (12) comprises an AC / DC power management unit, a DC / DC The circuit protection unit is used for output overvoltage and short circuit protection, input undervoltage and overvoltage protection, and overtemperature protection. The external AC220V voltage is converted into a DC12V power supply by the circuit protection unit through the AC / DC power management unit, and then powered by the subsequent control equipment after DC / DC conversion. The data processing unit (11) reads and processes the data of the data acquisition unit and performs display control on the human-computer interaction unit (13). The microprocessor of the data processing unit (11) adopts an STM32F103C8T6 chip. The data acquisition unit is connected to the ST The human-machine interaction unit (13) is connected to the serial port of STM32F103C8T6 to read and process the data of the data acquisition unit; the human-machine interaction unit (13) is connected to the serial port of STM32F103C8T6; the human-machine interaction unit (13) is installed on the front panel of the detection control box (7), and a TFT-LCD liquid crystal screen is used to realize human-machine interaction. The core processing unit of the liquid crystal screen of the human-machine interaction unit is a display control module. The display control module is connected to the data processing unit (11) via a UART serial interface. The data acquisition unit collects electrical quantity signals of current, voltage and rotation speed and transmits them to the data processing unit (11) for analysis and processing;The data processing unit (11) calculates the load torque of the transmission mechanism according to the formula and controls the display of the display screen. Its microprocessor adopts STM32F103C8T6. The sensor data is connected to the serial port of the microprocessor through the interface chip, and the display screen is connected to the UART1 port of the microprocessor. ; 9. A measurement method using an automatic measurement system for load torque of a transmission mechanism as claimed in claim 8, characterized in that: The following steps are involved: Step 1: Determine the simulated load of the azimuth or pitch according to the load requirement of the transmission mechanism in the azimuth or pitch (2); Step 2: designing the installation platform (1) according to the installation form of the reducer (3), the motor (5) and the simulated load (2); Step 3: Connect the detection device to the installation platform (1); connect the detection control box to the detection device via a test cable (6); Step 4: Power on the automatic measurement system, and the data acquisition unit collects the current, voltage, and speed values ​​transmitted by the current sensor (8), the voltage sensor (9), and the speed sensor (10), and sends them to the data processing unit (11). The data processing unit (11) records the current value, voltage value, and speed value; the data processing unit (11) calculates the load torque of the transmission mechanism according to the following formula: T=9549P / N; P=UI; Where: T is torque, unit: Nm; P is the power of the motor, unit: kW; N is the motor speed, unit: r / min; U is the motor input voltage, unit: V; I is the motor input current, unit: A; The calculation result is sent to the display unit (14) of the human-computer interaction unit (13) through the serial port, and is displayed on the touch screen of the display unit (14).

10. The measuring method of the automatic measuring system of the transmission mechanism load torque according to claim 9, characterized in that: In the step 3, the connection of the detection device includes the following steps: first, the output shaft of the reducer (3) is connected to the output gear, the reducer (3) is connected to the simulated load (2) through the output gear, and then the reducer (3) is connected to the mounting platform (1) and the tightening of the screws is checked; next, the coupling (4) is installed on the input shaft of the reducer (3), and is not tightened first, and then the other end of the coupling (4) is connected to the motor (5), and the screws at both ends of the coupling (4) are tightened; then the motor (5) is connected to the mounting platform (1) and the screws are checked to see if they are completely tightened; the integration of the detection control box includes installing the power supply unit (12), the human-machine interaction unit (13), the current sensor (8), the voltage sensor (9), the speed sensor (10), the data acquisition unit and the data processing unit (11) in the detection control box (7).

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