Wire rope tension automatic detection circuit and method

Abstract

According to the automatic detection circuit and method for the tension of the steel cable, measurement of the tension value of the steel cable, automatic comparison of the tension of the steel cable and automatic adjustment of the tension of the steel cable are integrated, automatic detection and automatic adjustment of the tension of the steel cable are achieved, and the circuit and method have the advantages of saving manpower, material resources and other resources; meanwhile, low-cost and extremely-simple structural design is adopted, the cost is saved to the maximum extent on the premise that indexes such as functions and performance are met, the number of workers is reduced from two workers to one worker in the steel cable tension adjusting process, the single-machine steel cable adjusting period is shortened from three days to one day, and during outfield troubleshooting, the labor intensity of workers is reduced, and the labor intensity of workers is reduced. And the travel expense of troubleshooting personnel can be saved by more than 70%.

Description

Technical Field

[0001] The present application belongs to the field of aviation assembly technology, and in particular, relates to a steel cable tension automatic detection circuit and method. Background Art

[0002] At present, the cable tension adjustment mainly adds an automatic adjustment device in the cable system, but the device has safety hazards, and the device adopts a spring energy storage and energy release scheme, but the spring energy storage is insufficient during use, and the adjustment of the cable tension cannot meet the actual use needs. In addition, the use and maintenance costs of the device are high.

[0003] This device has always existed in the aircraft control system. It is heavy, not conducive to aircraft weight reduction, and increases fuel consumption. Summary of the invention

[0004] Purpose of the invention: The present invention proposes a wire rope tension automatic detection circuit and method, which has high assembly efficiency, short assembly cycle and low cost. When used in conjunction with a corresponding wire rope tension automatic detection or adjustment device, it can realize automatic adjustment of aircraft wire rope tension and manual inching adjustment, meeting various adjustment scenario requirements during use.

[0005] In a first aspect, the present application provides a wire rope tension automatic detection circuit, the detection circuit comprising a first capacitor, a motor, a motor chip, a first resistor, a second resistor, a second capacitor, a third resistor, a fourth resistor, a power supply, a fifth resistor, a single chip microcomputer, a voltage regulator diode, a sixth resistor, an analog-to-digital conversion chip, a signal power supply, a switch, a seventh resistor, a third capacitor, a transistor and a force sensor;

[0006] Among them, the two ends of the first capacitor are respectively connected to the wiring terminals of the motor, which serves as a buffer device for starting and stopping the motor; the motor chip outputs 4 instructions: forward, reverse, floating, and locking, and outputs corresponding instructions to the motor; the first resistor is connected in parallel to the wiring port F1 of the motor chip; the second resistor is connected in parallel to the wiring port B1 of the motor chip; the second capacitor is connected in parallel to the two ends of the second resistor; the third resistor is connected in series to the wiring port B1 of the motor chip; the fourth resistor is connected in series to the wiring port F1 of the motor chip; the positive pole of the power supply is connected to the VCC of the motor chip, and the negative pole is connected to the ground wire; the fifth resistor is connected in series between the signal power supply and the force sensor.

[0007] Preferably, the P1.6 port and the P1.7 port of the single-chip computer are connected to the third resistor and the fourth resistor through wires, its GND port is connected to the ground wire, the VCC port is connected to the positive electrode of the signal power supply through a wire, a voltage-stabilizing diode, a sixth resistor, and a switch, the P0.2 port is connected to the DOUT / READY port of the analog-to-digital conversion chip, the P0.3 port is connected to the DIN port of the analog-to-digital conversion chip through a wire, the P0.4 port is connected to the SCLK port of the analog-to-digital conversion chip, and the P0.5 port is connected to the CS port of the analog-to-digital conversion chip; the two ends of the voltage-stabilizing diode are respectively connected to the single-chip computer and the sixth resistor through wires; the two ends of the sixth resistor are respectively connected to the voltage-stabilizing diode and the switch through wires.

[0008] Preferably, the analog-to-digital conversion chip has a total of 10 ports, the SCLK port is connected to the P0.4 port of the single-chip microcomputer through a wire, the CS port is connected to the P0.5 port of the single-chip microcomputer through a wire, the GND port is connected to the ground wire through a wire, the AIN0 port, the AIN1 port, the AIN2 port, and the AIN3 port are connected to the third capacitor through a wire, the VDD port is connected to the output end of the voltage-regulating diode through a wire, the DOUT / READY port is connected to the P0.2 port of the single-chip microcomputer through a wire, and the DIN port is connected to the P0.3 port of the single-chip microcomputer through a wire.

[0009] Preferably, the positive electrode of the signal power supply is connected to the switch, and the negative electrode is connected to the ground wire; one end of the switch is connected to the signal power supply, and the other end is connected to the circuit; one end of the seventh resistor is connected to the switch through a wire, and the other end is connected to the collector of the transistor through a wire; one end of the third capacitor is connected to the digital-to-analog conversion chip through a wire, and the other end is connected to the collector of the transistor through a wire; the collector of the transistor is connected to one end of the third capacitor and one end of the seventh resistor through a wire, the base is connected to the signal positive output end of the force sensor through a wire, and the emitter is connected to the ground wire through a wire.

[0010] Preferably, the force sensor has a total of 4 interfaces, the positive electrode of the power supply is connected to one end of the fifth resistor through a wire, the negative electrode of the power supply is connected to the ground wire through a wire, the positive electrode of the signal is connected to the base of the transistor through a wire, and the negative electrode of the signal is connected to the ground wire through a wire.

[0011] Preferably, the motor is a cable tension adjustment motor, the cable tension increases when the motor rotates forward, and decreases when the motor rotates reversely, and the motor is locked when the cable tension meets the requirement.

[0012] Preferably, the single chip microcomputer is a chip, which is the core of the entire circuit control.

[0013] In a second aspect, the present application also provides a method for automatically detecting the tension of a steel cable, the method comprising:

[0014] Turn on the switch to power the system;

[0015] The force sensor provides the analog signal of the cable tension value in real time and transmits the force value to the analog-to-digital conversion chip in real time.

[0016] The analog-to-digital conversion chip converts the collected analog signal into a digital signal and transmits it to the microcontroller;

[0017] After receiving the digital signal, the single chip microcomputer compares the cable tension at the temperature corresponding to the cable tension temperature curve table set by the program;

[0018] When the actual cable tension is less than the theoretical cable tension, the microcontroller sends a forward command to the motor chip. When the actual cable tension is greater than the theoretical cable tension, the microcontroller sends a reverse command to the motor chip. When the actual cable tension is equal to the theoretical cable tension, the microcontroller sends a locking command to the motor chip.

[0019] Beneficial technical effects of this application:

[0020] The present invention proposes an efficient automatic detection circuit and method for steel cable tension. Through creative design, the measurement of steel cable tension value, automatic comparison of steel cable tension, and automatic adjustment of steel cable tension are integrated into one, thereby realizing automatic detection and automatic adjustment of steel cable tension, and having the advantage of saving manpower, material resources and other resources.

[0021] At the same time, the present invention saves costs to the maximum extent under the premise of ensuring that the functions, performance and other indicators are met, and adopts automatic comparison and automatic calculation of the steel cable tension, which can greatly save the manpower costs in calculation, analysis and comparison after the steel cable tension measurement during the steel cable measurement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a circuit diagram for automatically detecting the tension of a steel cable provided in an embodiment of the present application;

[0023] Among them, the first capacitor 1, the motor 2, the motor chip 3, the first resistor 4, the second resistor 5, the second capacitor 6, the third resistor 7, the fourth resistor 8, the power supply 9, the fifth resistor 10, the single-chip computer 11, the Zener diode 12, the sixth resistor 13, the analog-to-digital conversion chip 14, the signal power supply 15, the switch 16, the seventh resistor 17, the third capacitor 18, the transistor 19, and the force sensor 20. DETAILED DESCRIPTION

[0024] See also Figure 1, the two ends of the first capacitor 1 are respectively connected to the wiring terminals of the motor 2, which is a buffer device for starting and stopping the motor 2; the motor 2 is a cable tension adjustment motor, the cable tension increases when the motor rotates forward, and the cable tension decreases when the motor rotates reversely, and the motor is locked when the cable tension meets the requirements; the motor chip 3 outputs 4 instructions including forward rotation, reverse rotation, floating, and locking, and outputs corresponding instructions to the motor; the first resistor 4 is connected in parallel to the wiring port F1 (2 pins) of the motor chip 3; the second resistor 5 is connected in parallel to the wiring port B1 (1 pin) of the motor chip 3; the second capacitor 6 is connected in parallel to the two ends of the second resistor 5; the third resistor 7 is connected in series to the wiring port B1 (1 pin) of the motor chip 3; the fourth resistor 8 is connected in series to the motor The connection port F1 (2 pins) of the chip 3; the positive pole of the power supply 9 is connected to the VCC (4 pins) of the motor chip 3, and the negative pole is connected to the ground wire; the fifth resistor 10 is connected in series between the signal power supply 15 and the force sensor 20; the single-chip computer 11 is a chip and is the core of the entire circuit control. Its P1.6 port (7 pins) and P1.7 port (8 pins) are connected to the third resistor 7 and the fourth resistor 8 through wires, its GND port (20 pins) is connected to the ground wire, the VCC port (40 pins) is connected to the positive pole of the signal power supply 15 through wires, the voltage-stabilizing diode 12, the sixth resistor 13, and the switch 16, and the P0.2 port (37 pins) is connected to the analog-to-digital conversion chip 14. The DOUT / READY port (9 pins) is connected to the DOUT / READY port (9 pins), the P0.3 port (36 pins) is connected to the DIN port (10 pins) of the analog-to-digital conversion chip 14 through a wire, the P0.4 port (35 pins) is connected to the SCLK port (1 pin) of the analog-to-digital conversion chip 14, and the P0.5 port (34 pins) is connected to the CS port (2 pins) of the analog-to-digital conversion chip 14; the two ends of the voltage-stabilizing diode 12 are respectively connected to the single-chip computer 11 and the sixth resistor 13 through wires; the two ends of the sixth resistor 13 are respectively connected to the voltage-stabilizing diode 12 and the switch 16 through wires; the analog-to-digital conversion chip 14 has a total of 10 ports (10 pins), and the SCLK port (1 pin) is connected to the The P0.4 port (35 pins) of the single-chip computer 11 is connected, the CS port (2 pins) is connected to the P0.5 port (34 pins) of the single-chip computer 11 through a wire, the GND port (3 pins) is connected to the ground wire through a wire, the AIN0 port (4 pins), the AIN1 port (5 pins), the AIN2 port (6 pins), and the AIN3 port (7 pins) are connected to the third capacitor 18 through a wire, the VDD port (8 pins) is connected to the output end of the voltage-stabilizing diode 12 through a wire, the DOUT / READY port (9 pins) is connected to the P0.2 port (37 pins) of the single-chip computer 11 through a wire, and the DIN port (10 pins) is connected to the P0.3 ports (36 pins) are connected; the positive pole of the signal power supply 15 is connected to the switch 16, and the negative pole is connected to the ground wire; one end of the switch 16 is connected to the signal power supply, and the other end is connected to the circuit; one end of the seventh resistor 17 is connected to the switch 16 through a wire, and the other end is connected to the collector of the transistor 19 through a wire; one end of the third capacitor 18 is connected to the digital-to-analog conversion chip 14 through a wire, and the other end is connected to the collector of the transistor 19 through a wire; the collector of the transistor 19 is connected to one end of the third capacitor 18 and one end of the seventh resistor 17 through a wire, the base is connected to the signal positive output end of the force sensor 20 through a wire, and the emitter is connected to the ground wire through a wire; the force sensor 20 has a total of 4 interfaces, the positive pole of the power supply is connected to one end of the fifth resistor 10 through a wire, the negative pole of the power supply is connected to the ground wire through a wire, the positive pole of the signal is connected to the base of the transistor 19 through a wire, and the negative pole of the signal is connected to the ground wire through a wire. .

[0025] In other embodiments of the present application, the present application provides a method for automatically detecting the tension of a steel cable, comprising the following steps:

[0026] The first step is to follow Figure 1 Complete the circuit connection work.

[0027] The second step is to burn the control program through the WR / P3.6 (16-pin) and RD / P3.7 (17-pin) ports of the microcontroller 11.

[0028] The third step is to turn on the switch 16 to power the system.

[0029] In the fourth step, the force sensor 20 works in real time and continuously to provide an analog signal of the cable tension value, and transmits the force value to the analog-to-digital conversion chip 14 in real time.

[0030] In the fifth step, the analog-to-digital conversion chip 14 converts the collected analog signal into a digital signal and transmits it to the single-chip microcomputer 11 .

[0031] In the sixth step, after receiving the digital signal, the single chip microcomputer 11 compares the cable tension at the temperature corresponding to the cable tension temperature curve table set by the program.

[0032] Step 7. When the actual cable tension is less than the theoretical cable tension, the single-chip microcomputer 11 sends a forward rotation command to the motor chip 3. When the actual cable tension is greater than the theoretical cable tension, the single-chip microcomputer 11 sends a reverse rotation command to the motor chip 3. When the actual cable tension is equal to the theoretical cable tension, the single-chip microcomputer 11 sends a locking command to the motor chip 3.

[0033] The present invention integrates the measurement of cable tension value, automatic comparison of cable tension, and automatic adjustment of cable tension into one, thereby realizing automatic detection and automatic adjustment of cable tension, and has the advantages of saving manpower, material resources and other resources. At the same time, the present invention adopts low cost and extremely simple structural design, and saves costs to the maximum extent under the premise of ensuring that functional and performance indicators are met. The present invention reduces the number of personnel for adjusting cable tension from the original 2 manual personnel to 1 person, and shortens the adjustment period of a single cable from the original 3 days to 1 day. When troubleshooting in the field, the travel expenses of the troubleshooting personnel can be saved by more than 70%.

Claims

1. A steel cable tension automatic detection circuit, characterized in that: The detection circuit includes a first capacitor, a motor, a motor chip, a first resistor, a second resistor, a second capacitor, a third resistor, a fourth resistor, a power supply, a fifth resistor, a single chip microcomputer, a voltage regulator diode, a sixth resistor, an analog-to-digital conversion chip, a signal power supply, a switch, a seventh resistor, a third capacitor, a transistor and a force sensor; Among them, the two ends of the first capacitor are respectively connected to the wiring terminals of the motor, which serves as a buffer device for starting and stopping the motor; the motor chip outputs 4 instructions: forward, reverse, floating, and locking, and outputs corresponding instructions to the motor; the first resistor is connected in parallel to the wiring port F1 of the motor chip; the second resistor is connected in parallel to the wiring port B1 of the motor chip; the second capacitor is connected in parallel to the two ends of the second resistor; the third resistor is connected in series to the wiring port B1 of the motor chip; the fourth resistor is connected in series to the wiring port F1 of the motor chip; the positive pole of the power supply is connected to the VCC of the motor chip, and the negative pole is connected to the ground wire; the fifth resistor is connected in series between the signal power supply and the force sensor.

2. The detection circuit according to claim 1, characterized in that: The P1.6 port and the P1.7 port of the single-chip computer are connected to the third resistor and the fourth resistor through wires, the GND port thereof is connected to the ground wire, the VCC port is connected to the positive electrode of the signal power supply through a wire, a voltage-stabilizing diode, a sixth resistor, and a switch, the P0.2 port is connected to the DOUT / READY port of the analog-to-digital conversion chip, the P0.3 port is connected to the DIN port of the analog-to-digital conversion chip through a wire, the P0.4 port is connected to the SCLK port of the analog-to-digital conversion chip, and the P0.5 port is connected to the CS port of the analog-to-digital conversion chip; the two ends of the voltage-stabilizing diode are respectively connected to the single-chip computer and the sixth resistor through wires; the two ends of the sixth resistor are respectively connected to the voltage-stabilizing diode and the switch through wires.

3. The detection circuit according to claim 2, characterized in that: The analog-to-digital conversion chip has a total of 10 ports, the SCLK port is connected to the P0.4 port of the single-chip microcomputer through a wire, the CS port is connected to the P0.5 port of the single-chip microcomputer through a wire, the GND port is connected to the ground wire through a wire, the AIN0 port, the AIN1 port, the AIN2 port, and the AIN3 port are connected to the third capacitor through a wire, the VDD port is connected to the output end of the voltage-stabilizing diode through a wire, the DOUT / READY port is connected to the P0.2 port of the single-chip microcomputer through a wire, and the DIN port is connected to the P0.3 port of the single-chip microcomputer through a wire.

4. The detection circuit according to claim 3, characterized in that: The positive electrode of the signal power supply is connected to the switch, and the negative electrode is connected to the ground wire; one end of the switch is connected to the signal power supply, and the other end is connected to the circuit; One end of the seventh resistor is connected to the switch through a wire, and the other end is connected to the collector of the transistor through a wire; one end of the third capacitor is connected to the digital-to-analog conversion chip through a wire, and the other end is connected to the collector of the transistor through a wire; the collector of the transistor is connected to one end of the third capacitor and one end of the seventh resistor through a wire, the base is connected to the signal positive output end of the force sensor through a wire, and the emitter is connected to the ground wire through a wire.

5. The detection circuit according to claim 4, characterized in that: The force sensor has a total of 4 interfaces, the positive electrode of the power supply is connected to one end of the fifth resistor through a wire, the negative electrode of the power supply is connected to the ground wire through a wire, the positive electrode of the signal is connected to the base of the transistor through a wire, and the negative electrode of the signal is connected to the ground wire through a wire.

6. The detection circuit according to claim 5, characterized in that: The motor is a wire rope tension adjustment motor. When the motor rotates forward, the wire rope tension increases. When the motor rotates reversely, the wire rope tension decreases. When the wire rope tension meets the requirement, the motor is locked.

7. The detection circuit according to claim 6, characterized in that: The single chip microcomputer is a chip and is the core of the entire circuit control.

8. A method for automatically detecting the tension of a steel cable, characterized in that: The method comprises: Turn on the switch to power the system; The force sensor provides the analog signal of the cable tension value in real time and transmits the force value to the analog-to-digital conversion chip in real time. The analog-to-digital conversion chip converts the collected analog signal into a digital signal and transmits it to the microcontroller; After receiving the digital signal, the single chip microcomputer compares the cable tension at the temperature corresponding to the cable tension temperature curve table set by the program; When the actual cable tension is less than the theoretical cable tension, the microcontroller sends a forward command to the motor chip. When the actual cable tension is greater than the theoretical cable tension, the microcontroller sends a reverse command to the motor chip. When the actual cable tension is equal to the theoretical cable tension, the microcontroller sends a locking command to the motor chip.

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