A comprehensive measuring device for operating parameters of dual-redundant winch cables

Abstract

The present invention belongs to the field of winch technology, and particularly relates to a dual-redundancy winch cable operating parameter comprehensive measurement device; the device comprises a bracket, a pin force sensor is provided on the bracket, a pulley is connected to the pin force sensor via a bearing, and a multi-turn absolute position encoder is provided on one side of the pulley, the multi-turn absolute position encoder is connected to the pulley via a conversion gear. The present invention provides a new dual-redundancy winch cable operating parameter comprehensive measurement device, which can simultaneously measure the winch cable retraction and extension length, movement direction, retraction and extension speed, and load size through the pin force sensor and the multi-turn absolute position encoder, and can record cable length data after power failure, realize dual-redundancy or multi-redundancy design, and improve measurement accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of winches, and in particular relates to a comprehensive measuring device for cable operating parameters of a dual-redundancy winch. Background Art

[0002] Normally, the length and speed of the winch cable are recorded by the detection element connected to the drum, which records the number of turns and rotation speed of the drum, or the number of turns and rotation speed of the power source are converted to the drum data, and then the length of the cable wound on the drum is used to calculate the length and speed of the cable; the load size of the winch is calculated by detecting the input torque of the drum or power source, and according to the relationship between the load size and the drum structural parameters, the load size is calculated by the torque size.

[0003] The cable operating parameters obtained using this method depend on the dimensional parameters of the cable wound on the drum. Due to the characteristics of the cable winding on the drum, this measurement method has a certain degree of error. For winches with short single-layer winding, the cable length, speed, and load data obtained using this method are relatively accurate, but the error increases with the number of winding layers and the length of the cable. In aviation winches, in particular, to achieve miniaturization and lightweight requirements, the number of cable winding layers often reaches dozens of layers, and the cable length can reach hundreds or even thousands of meters. This leads to significant errors in the cable operating parameters calculated from the drum operating parameters.

[0004] The patent with authorization announcement number CN 214471004 U discloses a rope speed and force measuring device. The device uses three pulleys for speed measurement, and the force measuring device can measure the movement speed and tension of the cable. Its principle is to use the middle pulley and the weighing sensor or axle pin sensor installed on it to measure the tension on the pulley, and then calculate the tension on the cable based on the angle between the pulleys on both sides and the middle pulley; use a speed sensor installed coaxially with the pulley to detect the pulley rotation speed, and combine it with the pulley diameter to calculate and convert it into cable speed; this device cannot measure the length of the cable, and due to its principle limitations, it is difficult to achieve redundancy setting; and this measuring device has many pulleys, large volume, and complex structure; the cable needs to undergo three reverse bends to pass through the measuring device, which seriously damages the cable life.

[0005] Patent publication number CN 102798729 B discloses a device for measuring the tension and speed of a wire rope. This device uses a single pulley for measurement. The force and speed measurement methods are the same as those of the three-pulley mechanism described above. This improved measurement method involves adding a photoelectric (or inductive, ultrasonic, Hall, or other form) sensor to the bracket and setting detection points on the pulley. The sensor senses the detection points on the rotating pulley and outputs a pulse signal each time it senses a detection point. The angle the pulley has rotated can be calculated by recording the number of pulse signals and combining this with the number of detection points set on the pulley. The length of the cable can be calculated by angle calculation. This method can detect the cable's running length, but it does so by recording the number of times the sensor generates a signal and calculating the total length based on the number and the length of each signal. This method can only record relative motion displacement, but cannot record the absolute length of the cable or identify its direction of movement. In systems with high reliability requirements, a manual operation mode is usually set. When an abnormal power outage or other situation occurs, the cable must be recovered or released manually. Due to the working principle limitations of this measuring device, the cable length information cannot be recorded when operating in a power outage. When the power is turned on again, the cable length data will be disordered. Summary of the Invention

[0006] In view of the above problems, the present invention provides a new comprehensive measuring device for operating parameters of dual-redundant winch cables.

[0007] The specific technical solutions of the present invention are as follows:

[0008] The present invention provides a comprehensive measuring device for the operating parameters of a double-redundant winch cable, comprising a bracket, on which a shaft pin force sensor is provided, a pulley connected to the shaft pin force sensor via a bearing, a multi-turn absolute position encoder provided on one side of the pulley, and the multi-turn absolute position encoder connected to the pulley via a conversion gear.

[0009] As a further improvement, at least two bearings are provided, which are connected to the through-holes of the pulley and are both sleeved outside the axle pin force sensor, and the axle pin force sensor passes through the front and rear sides of the bracket.

[0010] As a further improvement, the conversion gear includes a ring gear and a gear, the ring gear is coaxially connected to the pulley, the gear and the ring gear are meshed, and are connected to the input end of the multi-turn absolute position encoder.

[0011] As a further improvement, at least two of the multi-turn absolute position encoders and the gears are provided, and the gears are evenly distributed along the circumference of the pulley and are all engaged with the pulley.

[0012] As a further improvement, a stop block is provided on the bracket, and the stop block is provided between the axle pin force sensor and the multi-turn absolute position encoder.

[0013] As a further improvement, a groove is provided on the axle pin force sensor, and part of the stop block is clamped in the groove.

[0014] As a further improvement, a cable anti-slip baffle is provided on the side of the bracket away from the multi-turn absolute position encoder.

[0015] As a further improvement, a gap is provided between the cable anti-slip baffle and the pulley, and the gap is smaller than half of the cable diameter.

[0016] In a further improvement, the axle pin force sensor and the multi-turn absolute position encoder both communicate with a winch controller, which includes the following parts:

[0017] A receiving unit configured to receive a voltage signal uploaded by the axle pin force sensor and a position signal uploaded by the multi-turn absolute position encoder;

[0018] The signal processing unit is configured to process the voltage signal to obtain the load on the cable, and to process the position signal to obtain the angular displacement θ of the pulley;

[0019] The calculation unit is configured to calculate the angular displacement θ per unit time to obtain the angular velocity ω, determine the direction of movement of the cable according to the angular displacement, and calculate the length and speed of the cable according to the angular displacement and angular velocity. The calculation formulas for the cable speed V and length S are as follows:

[0020] v=ω R

[0021] S=θ R

[0022] Where R is the center radius of the pulley groove.

[0023] A further improvement is that the calculation unit determines the movement direction of the cable according to the increasing and decreasing trend of the angular displacement, wherein if the angular displacement shows an increasing trend, the cable is in the releasing movement direction, and if the angular displacement shows a decreasing trend, the cable is in the retrieving movement direction.

[0024] The beneficial effects achieved by the present invention are:

[0025] The present invention provides a new dual-redundancy winch cable operating parameter comprehensive measuring device, which can simultaneously measure the winch cable retraction and extension length, movement direction, retraction and extension speed and load size through an axle pin force sensor and a multi-turn absolute position encoder, and can record cable length data after power failure, and can realize dual-redundancy or multi-redundancy design and improve measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the comprehensive measurement device for operating parameters of the double-redundant winch cable in the present invention;

[0027] Figure 2 A side view of the comprehensive measuring device for operating parameters of a double-redundant winch cable according to the present invention;

[0028] Figure 3 A cross-sectional view of the comprehensive measuring device for operating parameters of a double-redundant winch cable according to the present invention;

[0029] Figure 4 Schematic diagram of the gear arrangement of the dual-redundancy winch cable operating parameter comprehensive measurement device in the present invention. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to explain the content of the present invention and are not used to limit the scope of protection of the present invention.

[0031] The present invention provides a device for measuring the operating parameters of a double-redundant winch cable. Figure 1-Figure 2 As shown, it includes a bracket 1, on which an axle pin force sensor 2 is provided, and a pulley 5 is connected to the axle pin force sensor 2 through a bearing 3. A multi-turn absolute position encoder 4 is provided on one side of the axle pin force sensor 2, and the multi-turn absolute position encoder 4 is connected to the pulley 5 through a conversion gear.

[0032] In this embodiment, at least two bearings 3 are provided, which are connected to the through holes of the pulley 5 and are both sleeved outside the axle pin force sensor 2, and the axle pin force sensor 2 passes through the front and rear sides of the bracket 1.

[0033] In this embodiment, the conversion gear includes a ring gear 6 and a gear 7 . The ring gear 6 is coaxially connected to the pulley 5 . The gear 7 is meshed with the ring gear 6 and connected to the input end of the multi-turn absolute position encoder 4 .

[0034] In this embodiment, there are at least two multi-turn absolute position encoders 4 and at least two gears 7, each of which is evenly distributed along the circumference of the pulley. By adjusting the number of gears that mesh with the fixed ring gear on the pulley, sensors can be placed in multiple locations to achieve dual redundancy or multiple redundancy detection.

[0035] In this embodiment, the bracket 1 is provided with a stopper 8, and the stopper 8 is provided between the shaft pin force sensor 2 and the multi-turn absolute position encoder 4. The shaft pin force sensor 2 is provided with a groove, and part of the stopper 8 is engaged in the groove.

[0036] In this embodiment, a cable anti-slip baffle 9 is provided on the side of the bracket 1 away from the multi-turn absolute position encoder 4. A gap is provided between the cable anti-slip baffle 9 and the pulley 5, and the gap is smaller than half of the cable diameter.

[0037] In this embodiment, the pin force sensor 2 and the multi-turn absolute position encoder 4 both communicate with the winch controller, which includes the following parts:

[0038] A receiving unit configured to receive a voltage signal uploaded by the axle pin force sensor and a position signal uploaded by the multi-turn absolute position encoder;

[0039] The signal processing unit is configured to process the voltage signal to obtain the load on the cable, and to process the position signal to obtain the angular displacement θ of the pulley;

[0040] The calculation unit is configured to calculate the angular displacement θ per unit time to obtain the angular velocity ω, determine the direction of movement of the cable according to the angular displacement, and calculate the length and speed of the cable according to the angular displacement and angular velocity. The calculation formulas for the cable speed V and length S are as follows:

[0041] v=ω R

[0042] S=θ R

[0043] Where R is the center radius of the pulley groove.

[0044] In this embodiment, the calculation unit determines the movement direction of the cable according to the increasing and decreasing trend of the angular displacement. If the angular displacement shows an increasing trend, the cable is in the releasing direction, and if the angular displacement shows a decreasing trend, the cable is in the recovering direction.

[0045] The pulley is installed on the axle pin force sensor through the bearing, and the axle pin force sensor is fixed in the mounting hole of the bracket. The load on the cable is transmitted to the axle pin measurement sensor through the pulley. The tension on the cable can be calculated by detecting the force transmitted to the pulley by the cable; the multi-turn absolute position encoder can detect and record the absolute angular displacement θ of the pulley rotation, and the angular velocity ω can be obtained by calculating the angular displacement per unit time. The movement direction of the cable can be determined according to the increase and decrease trend of the angular displacement. If the angular displacement trend increases, the cable is in the release direction, and if the angular displacement trend decreases, the cable is in the recovery direction; according to the pulley angular displacement value and rotation speed, combined with the pulley rope groove center radius R, the length and speed of the cable movement are calculated.

[0046] The axle pin force sensor is connected to the pulley through the bearing 3. The force on the cable is transmitted from the pulley to the axle pin force sensor through the bearing. The strain generated by the cable load on the sensor is measured by the strain measuring element, and a voltage signal is output. The voltage signal is transmitted to the winch controller for data processing, and the load size can be obtained; the multi-turn absolute position encoding can detect the rotation angle and rotation speed of the rotating shaft.

[0047] Certain embodiments of the subject matter have been described. Other embodiments are within the scope of the following claims. For example, the activities recited in the claims can be performed in a different order and still achieve the desired results. As an example, the processes depicted in the accompanying figures do not necessarily require the particular order or sequential sequence shown to achieve the desired results. In certain implementations, multitasking and parallel processing may be advantageous.

Claims

1. A comprehensive measuring device for operating parameters of a double-redundant winch cable, characterized in that: The invention comprises a bracket (1), wherein a shaft pin force sensor (2) is provided on the bracket (1), a pulley (5) is connected to the shaft pin force sensor (2) via a bearing (3), a multi-turn absolute position encoder (4) is provided on one side of the pulley (5), and the multi-turn absolute position encoder (4) is connected to the pulley (5) via a conversion gear; The bearings (3) are provided with at least two, connected to the through-holes of the pulley (5) and both are sleeved outside the shaft pin force sensor (2), and the shaft pin force sensor (2) passes through the front and rear sides of the bracket (1); The conversion gear comprises a ring gear (6) and a gear (7), the ring gear (6) is coaxially connected to the pulley (5), the gear (7) is meshed with the ring gear (6), and is connected to the input end of the multi-turn absolute position encoder (4); At least two of the multi-turn absolute position encoders (4) and the gears (7) are provided, and the gears (7) are evenly distributed along the circumference of the pulley; A cable anti-slip baffle (9) is provided on the side of the bracket (1) away from the multi-turn absolute position encoder (4); A gap is provided between the cable anti-slip baffle (9) and the pulley (5), and the gap is smaller than half of the cable diameter.

2. The dual-redundancy winch cable operating parameter comprehensive measurement device according to claim 1, characterized in that: A stop block (8) is provided on the bracket (1), and the stop block (8) is provided between the shaft pin force sensor (2) and the multi-turn absolute position encoder (4).

3. The dual-redundancy winch cable operating parameter comprehensive measurement device according to claim 1, characterized in that: The axle pin force sensor (2) is provided with a groove, and a portion of the stop block (8) is engaged in the groove.

4. The dual-redundancy winch cable operating parameter comprehensive measurement device according to claim 1, characterized in that: The pin force sensor (2) and the multi-turn absolute position encoder (4) both communicate with a winch controller, which includes the following parts: A receiving unit configured to receive a voltage signal uploaded by the axle pin force sensor and a position signal uploaded by the multi-turn absolute position encoder; The signal processing unit is configured to process the voltage signal to obtain the load on the cable, and process the position signal to obtain the angular displacement θ of the pulley; The calculation unit is configured to calculate the angular displacement θ per unit time to obtain the angular velocity ω, determine the direction of movement of the cable according to the angular displacement, and calculate the length and speed of the cable according to the angular displacement and angular velocity. The calculation formulas for the cable speed V and length S are as follows: v=ω R S=θ R Where R is the center radius of the pulley groove.

5. The dual-redundancy winch cable operating parameter comprehensive measurement device according to claim 4, characterized in that: The calculation unit determines the movement direction of the cable according to the increasing and decreasing trend of the angular displacement, wherein if the angular displacement shows an increasing trend, the cable is in the releasing movement direction, and if the angular displacement shows a decreasing trend, the cable is in the retrieving movement direction.

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