A method for zero point calibration and control of oil cylinder

Abstract

The present invention relates to the field of marine equipment control, and in particular to a device and control method capable of recalibrating the zero point. The oil cylinder zero point calibration device comprises a motor, a housing, a cylinder barrel and a driver; the housing is connected to the cylinder barrel, and there is a cavity between the housing and the cylinder barrel, the cylinder barrel is connected to the oil bag through a transmission pipe, and a slideway is provided on the surface of the housing; the motor is fixed in the cavity, the motor is connected to the driver through an encoder, the motor fixes a presser through a slider, and the slider can move in the slideway; the output end of the motor is connected to a spiral rod, and a piston is provided on the spiral rod; a control component is connected to the housing, and the presser presses the control component to control the motor. The motor pushes the piston to discharge or return oil by forward or reverse rotation. When the motor drives the presser to touch the control component, the amount of oil in the oil bag at this time is set to the maximum value, that is, the zero point position, which solves the problem of losing the zero point position after the encoder loses power.

Description

Technical Field

[0001] The invention relates to the field of marine equipment control, and in particular to a device and a control method capable of recalibrating a zero point. Background Art

[0002] Some underwater mobile platforms use a structure that combines a motor with a reducer. The piston is pushed by a screw rod connected to the motor, and the precise number of motor rotations and the distance the screw rod moves are obtained through an encoder to obtain the precise position of the piston, thereby achieving precise oil return and oil discharge operations, creating conditions for the precise hovering and oil discharge control strategy of the buoy.

[0003] However, since the encoder may lose power, the position will be reset to zero, and it will not be possible to obtain the current position after powering on again, nor the current oil volume in the oil bag, which will cause difficulties in the precise hovering of the buoy. Summary of the invention

[0004] An object of the present invention is to provide a cylinder zero point calibration device capable of calibrating the zero point position after the encoder loses power and becomes volatile.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A cylinder zero point calibration device comprises a motor, a housing, a cylinder barrel and a driver; the housing is connected to the cylinder barrel, a cavity is provided between the housing and the cylinder barrel, the cylinder barrel is connected to an oil bag via a transmission pipe, and a slideway is provided on the surface of the housing; the motor is fixed in the cavity, the motor is connected to the driver via an encoder, the motor fixes a presser via a slider, and the slider can move in the slideway; the output end of the motor is connected to a spiral rod, and a piston is provided on the spiral rod; a control component is connected to the housing, and the presser presses the control component to control the motor.

[0007] Furthermore, the control component includes a calibration button and a protection button, both of which are connected to the controller, and are axially placed on the outer shell, with the protection button located at the proximal end of the cylinder and the calibration button located at the distal end of the cylinder; both the calibration button and the protection button are fixed on the outer shell.

[0008] Furthermore, the outer surface of the presser is arc-shaped, and the presser is in point contact with the control component.

[0009] Furthermore, the position of the presser is always on one side of the protection button.

[0010] Furthermore, oil is stored between the piston and the oil bag. When the motor rotates clockwise, the piston moves toward the oil bag to discharge the oil, so that the oil enters the oil bag from the cylinder; when the motor rotates counterclockwise, the piston moves away from the oil bag to return the oil, so that the oil enters the cylinder from the oil bag.

[0011] Another object of the present invention is to provide a control method for a cylinder zero point calibration device capable of calibrating the zero point position after the encoder loses power and becomes volatile.

[0012] In order to achieve the above object, the present invention adopts the following technical solutions:

[0013] A method for zero point calibration of an oil cylinder is disclosed. After a motor drives a presser to touch a calibration button, the position of the oil bag at this time, i.e., the zero point position, is recorded. By collecting the number of rotations of the motor and the movement distance of the screw rod through an encoder, the oil bag can be further precisely controlled. There are four states of the stop position of the presser.

[0014] Furthermore, the first of the four states is that the presser is located on the same side of the calibration button and the protection button, and close to the calibration button; the motor is started to enter the oil discharge state until the presser touches the calibration button. The calibration button turns off the motor through the controller and records the maximum value of the oil bag, that is, the zero point position.

[0015] Furthermore, the second of the four states is that the presser is on the calibration button; starting the motor first puts the motor into the oil return state, and when the presser leaves the calibration button, the motor enters the oil discharge state until the presser touches the calibration button. The calibration button turns off the motor through the controller and records the maximum value of the oil bag, that is, the zero position.

[0016] Furthermore, the third state of the four states is that the presser is located between the calibration button and the protection button; the motor is started to enter the oil discharge state. When the presser touches the protection button, the motor changes to the oil return state until the presser presses and releases the calibration button. The motor enters the oil discharge state until the presser touches the calibration button. The calibration button turns off the motor through the controller and records the maximum value of the oil bag, that is, the zero point position.

[0017] Furthermore, the fourth of the four states is when the presser is on the protection button; the motor is started and enters the oil return state. When the presser presses and releases the calibration button, the motor enters the oil discharge state until the presser touches the calibration button. The calibration button turns off the motor through the controller and records the maximum value of the oil bag, that is, the zero point position.

[0018] The present invention has the following advantages and beneficial effects:

[0019] The present invention calibrates the zero point through a calibration button and a protection button. The motor pushes the piston through forward or reverse rotation to achieve oil discharge or oil return operation. When the motor drives the presser to touch the calibration button, the amount of oil in the oil bag at this time is set to the maximum value, that is, the zero point position, and the situation that the zero point position cannot be located after the encoder loses power and is easy to lose. A protection button is also provided to prevent the motor from pushing the piston too aggressively and causing damage to the components in the device. The contact surface of the presser is made into an arc shape, so that the contact mode between the presser and the button becomes a point contact, which guarantees the accuracy of the zero point position to the greatest extent. Combined with the four possible states of the presser, the contact point of the presser and the calibration button is made consistent through the combined operation of oil return and oil discharge, thereby reducing the zero point calibration error. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a schematic diagram of a cylinder zero point calibration device.

[0021] Figure 2 This is the first state flow chart of a method for zero point calibration of a cylinder.

[0022] Figure 3 This is the second state flow chart of a method for zero point calibration of a cylinder.

[0023] Figure 4 This is the third state flow chart of a method for zero point calibration of a cylinder.

[0024] Figure 5 This is the fourth state flow chart of a method for zero point calibration of a cylinder. DETAILED DESCRIPTION

[0025] Example 1

[0026] Combination Figures 1 to 5 , a cylinder zero point calibration device, including a motor 1, a housing 2, a cylinder 3 and a driver 4; the housing 1 is connected to the cylinder 3, and there is a cavity between the housing 1 and the cylinder 3, the cylinder 3 is connected to the oil bag 7 through a transmission pipe 6, and a slide 8 is provided on the surface of the housing 2; the motor 1 is fixed in the cavity, the motor 1 is connected to the driver 4 through an encoder 9, the motor 1 fixes a presser 11 through a slider 10, and the slider 10 can move in the slide 8; the output end of the motor 1 is connected to a screw rod 12, and a piston 13 is provided on the screw rod 12; the housing 2 is connected to a control component. The motor 1 can control the forward or backward movement of the screw rod 12, which will control the oil to enter or exit the oil bag 7. In this way, the oil amount in the oil bag 7 is controlled, and the purpose of the oil bag 7 rising or falling in the ocean is achieved.

[0027] The control assembly includes a calibration button 14 and a protection button 15, both of which are connected to a controller 16. The calibration button 14 and the protection button 15 are axially placed on the housing 2, the protection button 15 is located at the proximal end of the cylinder 3, and the calibration button 14 is located at the distal end of the cylinder 3. The calibration button 14 and the protection button 15 are both fixed on the housing 2. When the presser 11 touches the calibration button 14 or the protection button 15, the motor 1 stops moving, and the amount of oil in the oil bag is recorded at this time.

[0028] The outer surface of the presser 11 is arc-shaped, and the presser 11 is in point contact with the control component. The contact mode between the presser and the control component becomes point contact, which makes the position of the presser 11 pressing the button the same, reducing the error of the recorded position.

[0029] The position of the presser 11 is always on one side of the protection button 14. If the presser 11 exceeds the position behind the protection button 15, too much oil will be injected, thereby damaging the parts in the equipment.

[0030] Oil is stored between the piston 13 and the oil bag 7. When the motor 1 rotates clockwise, the piston 13 moves toward the oil bag 7 to discharge oil, so that the oil enters the oil bag 7 from the cylinder 3; when the motor 1 rotates counterclockwise, the piston 13 moves away from the oil bag 7 to return oil, so that the oil enters the cylinder 3 from the oil bag 7. In this way, the amount of oil in the oil bag 7 can be controlled, and the position of the oil bag 7 can also be accurately controlled.

[0031] Example 2

[0032] A method for zero point calibration of the oil cylinder described in the above embodiment, after the motor 1 drives the presser 11 to touch the calibration button 14, the position of the oil bag at this time, that is, the zero point position, is recorded; the number of rotations of the motor 1 and the movement distance of the screw rod 12 are collected by the encoder 9, so that the oil bag 7 can be further accurately controlled; the stop position of the presser 11 has four states. After the encoder 9 loses power and becomes volatile, the specific position information will be lost. The zero point position of the oil bag 7 is re-determined by this method, and the position of the oil bag 7 is accurately controlled by continuing to use the information obtained by the encoder 9 and the distance information of the screw rod 12.

[0033] The first of the four states is that the presser 11 is located on the same side of the calibration button 14 and the protection button 15, and is close to the calibration button 14; the motor 1 is started, and the motor 1 enters the oil discharge state until the presser 11 touches the calibration button 14. The calibration button 14 turns off the motor 1 through the controller 16 and records the maximum value of the oil bag 7, that is, the zero point position.

[0034] The second state of the four states is that the presser 11 is on the calibration button 14; the motor 1 is started, and the motor 1 first enters the oil return state. When the presser 11 leaves the calibration button 14, the motor 1 enters the oil discharge state until the presser 11 touches the calibration button 14. The calibration button 14 turns off the motor 1 through the controller 16 and records the maximum value of the oil bag 7, that is, the zero point position. The motor 1 enters the oil discharge state, and after touching the calibration button 14, the motor 1 is controlled by the controller 16 to stop running.

[0035] The third state of the four states is that the presser 11 is located between the calibration button 14 and the protection button 15; the motor 1 is started to enter the oil discharge state. When the presser 11 touches the protection button 15, the motor 1 changes to the oil return state until the presser 11 presses and releases the calibration button 14. The motor 1 enters the oil discharge state until the presser 11 touches the calibration button 14. The calibration button 14 turns off the motor through the controller 16 and records the maximum value of the oil bag 7, that is, the zero point position. Because the specific position of the presser 11 is uncertain, the oil must be discharged first. The approximate position of the presser 11 is determined according to the retreat distance. When the oil discharge touches the protection button 15, the motor 1 stops, and then the motor 1 is started to reverse, so that the distance of the presser 11 retreating exceeds the distance between the protection button 15 and the calibration button 14, and then the motor 1 enters the oil discharge state until it touches the calibration button 14, and the oil storage capacity of the oil bag is recorded.

[0036] The fourth state of the four states is when the presser 11 is on the protection button 15; the motor 1 is started, and the motor 1 enters the oil return state. When the presser 11 presses and releases the calibration button 14, the motor 1 enters the oil discharge state until the presser 11 touches the calibration button 14. The calibration button 14 turns off the motor 1 through the controller 16 and records the maximum value of the oil bag 7, that is, the zero point position. Since touching the protection button 15 will not enter the oil discharge state, the oil return is performed directly. The oil return distance must be greater than the distance between the protection button 15 and the calibration button 14. When the oil is discharged, the presser 11 touches the calibration button 14 to determine the zero point.

[0037] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A method for zero-point calibration of an oil cylinder, applied to a device for zero-point calibration of an oil cylinder, the device comprising a motor, a housing, a cylinder barrel and a driver; the housing is connected to the cylinder barrel, a cavity is provided between the housing and the cylinder barrel, the cylinder barrel is connected to the oil bag through a transmission pipe, and a slideway is provided on the surface of the housing; the motor is fixed in the cavity of the housing, the motor is connected to the driver through an encoder, the motor fixes a presser through a slider, and the slider can move in the slideway; a spiral rod is connected to the output end of the motor, and a piston is provided on the spiral rod; a control component is connected to the housing, and the presser can control the motor by pressing the control component, and the control component comprises a calibration button and a protection button, the calibration button and the protection button are both connected to the controller, the calibration button and the protection button are axially placed on the housing, the protection button is located at the proximal end of the cylinder barrel, and the calibration button is located at the distal end of the cylinder barrel; the calibration button and the protection button are both fixed on the housing; it is characterized in that: After the motor drives the presser to touch the control component, the position of the oil bag at this time, that is, the zero point position, is recorded; the number of rotations of the motor and the movement distance of the screw rod are collected by the encoder, so that the oil bag can be further accurately controlled; there are four states of the presser stop position; The first of the four states is that the presser is located on the same side of the calibration button and the protection button and is close to the calibration button; the motor is started to enter the oil discharge state until the presser touches the calibration button, and the calibration button turns off the motor through the controller and records the maximum value of the oil bag, that is, the zero point position; The second of the four states is that the presser is on the calibration button; start the motor and first put the motor into the oil return state. When the presser leaves the calibration button, the motor enters the oil discharge state until the presser touches the calibration button. The calibration button turns off the motor through the controller and records the maximum value of the oil bag, that is, the zero point position. The third state of the four states is that the presser is located between the calibration button and the protection button; the motor is started to enter the oil discharge state. When the presser touches the protection button, the motor changes to the oil return state until the presser presses and releases the calibration button. The motor enters the oil discharge state until the presser touches the calibration button. The calibration button turns off the motor through the controller and records the maximum value of the oil bag, that is, the zero point position. The fourth of the four states is when the presser is on the protection button; start the motor and put it into the oil return state. When the presser presses and releases the calibration button, the motor enters the oil discharge state until the presser touches the calibration button. The calibration button turns off the motor through the controller and records the maximum value of the oil bag, that is, the zero position.

2. The method for zero point calibration of a cylinder according to claim 1, characterized in that: The outer surface of the presser is in an arc shape, and the presser is in point contact with the control component.

3. The oil cylinder zero point calibration method according to claim 1, characterized in that: Oil is stored between the piston and the oil bag. When the motor rotates clockwise, the piston moves toward the oil bag to discharge the oil, so that the oil enters the oil bag from the cylinder; when the motor rotates counterclockwise, the piston moves away from the oil bag to return the oil, so that the oil enters the cylinder from the oil bag.

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