A release device for force and displacement integrated measurement and method of use thereof
By integrating displacement and axial force sensors into the release device, the displacement and axial force of the ejector pin are monitored in real time, solving the problem of difficult control of the ejector pin release action and achieving high-precision ejector pin movement and low-disturbance release.
Patent Information
- Application Number
- CN202310154065.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-02-21
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2043-02-21
AI Technical Summary
In existing technologies, it is difficult to control the release momentum of the ejector pin, resulting in large disturbances.
The release device, which integrates force and displacement measurement, includes a ejector pin, a displacement sensor, a drive mechanism, and an axial force sensor. The controller monitors the displacement and axial force of the ejector pin in real time and controls the operation of the drive mechanism to ensure high-precision movement of the ejector pin.
It achieves high-precision control of the ejector pin release process, limits disturbances to inspection quality, and ensures that the ejector pin completes the expected clamping and release actions. It is suitable for low-momentum release of large-mass inspection quality.
Smart Images
Figure CN116027445B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of inertial sensor, more particularly, to a release device for force and displacement integrated measurement and a method for using the same. BACKGROUND
[0002] The space gravitational wave detection is realized by adopting the principle of laser interferometry. As the reference datum of the laser interferometry distance measuring system, one of the main functions of the inertial sensor is to ensure that the test mass is safely and reliably fixed in the electrode shell in the launching stage, and after the satellite is put into orbit, the test mass is released by the release mechanism with a momentum less than 10-5 kgm / s, and is captured by the electrostatic control system.
[0003] The release momentum of the test mass is related to the action process of the releasing needle. In order to measure the action of the releasing needle, there is a ground simulation evaluation device for the on-orbit release of the inertial sensor. In the vacuum mechanism, a torsion pendulum mechanism is used to suspend the test mass. In the initial state, the release mechanism is in contact with the test mass to simulate the release of the test mass in the on-orbit release. A laser interferometer is used to detect the first release displacement signal of the test mass. A capacitive displacement sensor and an electrostatic feedback control circuit are used to detect the differential capacitance signal generated by the test mass and the capacitive plate in the initial state and after the release, and to apply a feedback control voltage on the capacitive plate according to the first release displacement signal and the differential capacitance signal, so as to generate an electrostatic force to pull the test mass back to the initial balance position again. The release mechanism in the above-mentioned scheme includes a releasing needle and a driver. In the initial state, the releasing needle is in contact with one side of the test mass to keep it in the balance position. In the on-orbit release, the driver drives the releasing needle to move away from the test mass to release the test mass. However, the releasing needle in the above-mentioned scheme is difficult to control the release momentum, and has the problem of large disturbance. SUMMARY
[0004] In order to overcome the defects that it is difficult to control the release momentum of the releasing needle and the disturbance is large in the process of measuring the action of the releasing needle in the prior art, the present application provides a release device for force and displacement integrated measurement and a method for using the same.
[0005] To solve the above technical problems, the technical scheme of the present application is as follows:
[0006] The application discloses a releasing device for force and displacement integrated measurement, which comprises a plunger, a displacement sensor, a driving mechanism and an axial force sensor which are sequentially arranged in a tubular shell from bottom to top; wherein, the end of the plunger is provided with an elastic support for applying upward pressure to the plunger, the bottom of the plunger is in pressure contact with the driving mechanism, and the elastic support applies a pre-tightening force to the driving mechanism; the displacement sensor is arranged between the bottom of the plunger and the driving mechanism and used for measuring the relative displacement of the plunger and the shell; the axial force sensor is arranged in connection with the driving mechanism and used for measuring the axial force in the releasing process of the plunger; and the device further comprises a controller which is used for receiving sensing signals of the displacement sensor and the axial force sensor and controlling the operation of the driving mechanism according to the size of the sensing signals.
[0007] In the initial state, the plunger in the device is in pressure contact with the end of the driving mechanism under the pressure of the elastic support, and the plunger does not contact the test mass at this time. In the test working state, the test mass is first placed between the two devices and constrained by the plungers, and then the driving mechanisms in the two devices are started simultaneously, the driving mechanisms provide driving force to the plungers, the plungers extend axially to the axial force sensor until the axial force sensor senses the pressure generated by the contact between the plunger and the test mass, the controller sends a control signal to the driving mechanism to make the plunger apply a pre-set pre-pressure to the test mass, the displacement sensor and the axial force sensor sense and measure the displacement and the axial force of the plunger in real time and feed back to the controller for storage, and the monitoring of the pressure and the displacement in the releasing action process of the plunger is completed. When the controller receives a releasing command, the controller sends a control signal to the driving mechanism, the driving mechanism stops working, and the plunger is retracted into the device shell under the pressure of the elastic support.
[0008] As a preferred solution, the elastic support comprises a gasket and a disc spring, the disc spring comprises a plurality of spring leaves, and a center ring is stacked between the spring leaves.
[0009] As a preferred solution, the displacement sensor comprises a metal wire type strain gauge arranged on a flexible sheet.
[0010] As a preferred solution, the driving mechanism comprises a piezoelectric stack, the power supply end of the piezoelectric stack is connected with an external power supply module through the controller, and the controller controls the input voltage of the piezoelectric stack.
[0011] As a preferred solution, the driving mechanism comprises at least two piezoelectric stacks, an intermediate gasket is arranged between the adjacent piezoelectric stacks, and the upper and lower surfaces of the intermediate gasket are respectively bonded with the ends of the piezoelectric stacks.
[0012] As a preferred solution, the stroke of the driving mechanism is 15 μm to 26 μm.
[0013] As a preferred solution, the device further comprises a fixing pin fixed to the end of the driving mechanism; the axial force sensor is arranged on the outer periphery of the fixing pin.
[0014] As a preferred solution, a protruding structure is arranged on the upper part of the fixing pin; a sliding groove matched with the protruding structure is arranged in the middle part of the shell from the end.
[0015] As a preferred solution, the axial force sensor comprises at least four resistance strain gauges arranged on the outer periphery of the fixing pin respectively.
[0016] The application further provides a use method of the release device for force and displacement integrated measurement according to any one of the above technical solutions, comprising the following steps.
[0017] The ejector pin in the device is pressed against the end of the driving mechanism under the pressure of the elastic support;
[0018] The test mass is placed between the two devices and constrained by the ejector pin;
[0019] The driving mechanisms in the two devices are started at the same time, the driving mechanisms provide driving force to the ejector pin, the ejector pin extends along the axial direction to the axial force sensor, the axial force sensor senses the pressure generated by the contact between the ejector pin and the test mass, the controller sends a control signal to the driving mechanism, the ejector pin applies a pre-set pre-pressure to the test mass, and the displacement sensor and the axial force sensor measure the displacement and the axial force of the ejector pin in real time and feed back to the controller for storage.
[0020] When the controller receives a release command, the controller sends a control signal to the driving mechanism, the driving mechanism stops working, and the ejector pin is retracted into the device shell under the pressure of the elastic support.
[0021] Compared with the prior art, the beneficial effects of the technical solution of the application are as follows: the ejector pin is driven by the driving mechanism to complete high-precision movement, thereby limiting the disturbance of the ejector pin release to the test mass to the maximum extent; the contact force between the ejector pin and the test mass during the release of the ejector pin and the movement displacement of the ejector pin can be monitored synchronously, so that the expected pressing and releasing actions of the ejector pin are ensured. The application has the advantages of simple and compact structure, high positioning accuracy, fast response speed, small disturbance to external magnetic field, etc., and can be applied to large-mass test mass with larger weight and extremely low momentum release. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 FIG. 1 is a structural schematic view of the release device for force and displacement integrated measurement of embodiment 1.
[0023] Figure 2Exploded view of the release device for integrated force and displacement measurement of Example 2.
[0024] Figure 3 Flow chart of the method for using the release device for integrated force and displacement measurement of Example 3.
[0025] Wherein, 1 - shell, 101 - sliding groove, 2 - thimble, 3 - displacement sensor, 4 - driving mechanism, 5 - axial force sensor, 6 - elastic support, 601 - gasket, 602 - spring leaf, 603 - center ring, 7 - intermediate gasket, 8 - fixing pin, 801 - protruding structure. DETAILED DESCRIPTION
[0026] The accompanying drawings are only used for illustrative purposes and should not be construed as limiting the patent;
[0027] In order to better illustrate the present embodiment, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual size of the product;
[0028] It is understandable for those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.
[0029] The technical solutions of the present application will be further described below in combination with the drawings and examples.
[0030] Example 1
[0031] The present embodiment proposes a release device for integrated force and displacement measurement, as shown in Figure 1 Figure 1 is a structural schematic diagram of the release device for integrated force and displacement measurement of the present embodiment.
[0032] The release device for integrated force and displacement measurement proposed in the present embodiment comprises, from bottom to top, a thimble 2, a displacement sensor 3, a driving mechanism 4 and an axial force sensor 5 installed in a tubular shell 1 in sequence.
[0033] The thimble 2 is used to directly contact with the test mass, and the large mass test mass block in the space inertia sensor is released through the retraction movement of the thimble 2.
[0034] The end of the thimble 2 in the present embodiment is sleeved with an elastic support 6, which exerts an upward pressure on the thimble 2. The bottom of the thimble 2 is pressed against the driving mechanism 4, and the elastic support 6 exerts a pre-tightening force on the driving mechanism 4.
[0035] The driving mechanism 4 is used to exert a pre-set pre-pressure on the thimble 2, thereby realizing high-precision driving of the movement of the tiny thimble 2 and limiting the disturbance of the thimble 2 to the test mass during the release process.
[0036] The displacement sensor 3 is disposed between the bottom of the ejector pin 2 and the drive mechanism 4, and is used to measure the relative displacement between the ejector pin 2 and the housing 1. The axial force sensor 5 is connected to the drive mechanism 4 and is used to measure the axial force during the release process of the ejector pin 2.
[0037] The device also includes a controller for receiving the sensing signals from the displacement sensor 3 and the axial force sensor 5, and controlling the operation of the drive mechanism 4 according to the magnitude of the sensing signals.
[0038] In the initial state of implementation, the ejector pin 2 in the device is pressed against the end of the drive mechanism 4 under the pressure of the elastic support 6, and at this time the ejector pin 2 is not in contact with the inspection quality.
[0039] In the inspection operation state, the inspection mass is first placed between the two devices and constrained by the ejector pin 2. Then, the drive mechanism 4 in both devices is activated simultaneously. The drive mechanism 4 provides driving force to the ejector pin 2. The ejector pin 2 extends axially until the axial force sensor 5 senses the pressure generated by the contact between the ejector pin 2 and the inspection mass. The controller sends a control signal to the drive mechanism 4 to make the ejector pin 2 apply a pre-set pre-pressure to the inspection mass. The displacement sensor 3 and the axial force sensor 5 sense and measure the displacement and axial force of the ejector pin 2 in real time and feed it back to the controller for storage, thus completing the monitoring of pressure and displacement during the release action of the ejector pin 2.
[0040] When the controller receives a release command, the controller sends a control signal to the drive mechanism 4, the drive mechanism 4 stops working, and the ejector pin 2 retracts into the device housing 1 under the pressure of the elastic support member 6.
[0041] In an optional embodiment, the tubular outer shell 1 of this embodiment is a hollow circular tube.
[0042] In one optional embodiment, the controller is connected to an external terminal or host computer via wired or wireless communication to transmit the displacement data and axial force data of the ejector pin 2 monitored in real time during operation to the external terminal or host computer for further monitoring and display.
[0043] The controller is omitted in the accompanying drawings of this embodiment. It can be set according to the usage requirements during the specific implementation process. This embodiment does not make any limiting descriptions.
[0044] In an optional embodiment, the drive mechanism 4 is connected to an external power module via a controller, which controls whether the drive mechanism 4 is energized and the magnitude of its operating voltage. The controller may optionally include a circuit or industrial chip for controlling the operating voltage of the drive mechanism 4.
[0045] The releasing device proposed in the embodiment drives the ejector pin 2 to complete high-precision movement through the driving mechanism 4, thereby limiting the disturbance to the test mass during the releasing process of the ejector pin 2. In addition, the releasing device can monitor the contact force between the ejector pin 2 and the test mass and the movement displacement of the ejector pin 2 during the releasing process of the ejector pin 2, thereby ensuring that the ejector pin 2 completes the expected pressing and releasing actions.
[0046] Embodiment 2
[0047] The releasing device for integrated measurement of force and displacement proposed in the embodiment is improved on the basis of the releasing device for integrated measurement of force and displacement proposed in Embodiment 1. As shown in FIG. 2, an exploded view of the releasing device for integrated measurement of force and displacement in the embodiment is shown. Figure 2
[0048] The releasing device for integrated measurement of force and displacement proposed in the embodiment includes, from bottom to top, the ejector pin 2, the displacement sensor 3, the driving mechanism 4, and the axial force sensor 5, which are sequentially installed in the tubular shell 1.
[0049] The ejector pin 2 is used to directly contact the test mass and release the test mass block in the space inertia sensor through the back movement of the ejector pin 2.
[0050] The end of the ejector pin 2 in the embodiment is sleeved with the elastic support 6, which applies upward pressure to the ejector pin 2. The bottom of the ejector pin 2 is pressed against the driving mechanism 4, and the elastic support 6 applies pre-tightening force to the driving mechanism 4.
[0051] The driving mechanism 4 is used to apply a pre-set pre-pressure to the ejector pin 2, thereby realizing high-precision driving of the movement of the ejector pin 2 and limiting the disturbance to the test mass during the releasing process of the ejector pin 2.
[0052] The displacement sensor 3 is arranged between the bottom of the ejector pin 2 and the driving mechanism 4 and is used to measure the relative displacement of the ejector pin 2 and the shell 1. The axial force sensor 5 is arranged in connection with the driving mechanism 4 and is used to measure the axial force during the releasing process of the ejector pin 2.
[0053] The device further includes a controller for receiving the sensing signals of the displacement sensor 3 and the axial force sensor 5 and controlling the operation of the driving mechanism 4 according to the size of the sensing signals.
[0054] Further, in an optional embodiment, the elastic support 6 includes a gasket 601 and a disc spring. The gasket 601 serves as a support between the disc spring and the shell 1. The disc spring includes a plurality of spring leaves 602 and a center ring 603 stacked between the spring leaves 602. The disc spring is used to apply upward pressure to the ejector pin 2, press the ejector pin 2 against the driving mechanism 4, and apply pre-tightening force to the driving mechanism 4.
[0055] As an exemplary illustration, the disc spring in the embodiment is composed of 3 identical spring leaves 602, and inner and outer center rings stacked between the spring leaves 602. The disc spring has a rigidity of about 100 N / m, which is negligible compared to the rigidity of other rigid contacts.
[0056] In an alternative embodiment, the displacement sensor 3 comprises a metal wire strain gauge arranged on a flexible sheet. The metal wire strain gauge has the characteristics of small structure and simple manufacture, and is particularly suitable for the ejector pin 2 releasing device.
[0057] In an alternative embodiment, the driving mechanism 4 comprises a piezoelectric stack, and the power supply end of the piezoelectric stack is connected to an external power module through the controller, and the controller controls the input voltage of the piezoelectric stack.
[0058] In the embodiment, the power supply end of the piezoelectric stack is connected to an external power module through the controller, and the controller controls whether the piezoelectric stack is powered on and the input voltage of the piezoelectric stack, so as to control the pressure exerted by the ejector pin 2 on the test mass.
[0059] Further, in an alternative embodiment, the driving mechanism 4 comprises at least two piezoelectric stacks, and an intermediate spacer 7 is arranged between the adjacent piezoelectric stacks, and the upper and lower surfaces of the intermediate spacer 7 are respectively bonded to the end portions of the piezoelectric stacks.
[0060] Further, the stroke of the driving mechanism 4 is 15 μm to 26 μm.
[0061] As an exemplary illustration, two piezoelectric stacks are selected to form the driving mechanism 4 in the embodiment, and the two piezoelectric stacks are sequentially installed in the tubular housing 1 from bottom to top, and an intermediate spacer 7 is arranged between the two piezoelectric stacks, and the upper and lower surfaces of the intermediate spacer 7 are respectively bonded to the end portions of the two piezoelectric stacks by epoxy resin.
[0062] In the specific implementation process, the lower piezoelectric stack works as the main driving mechanism 4, and the upper piezoelectric stack works as the standby driving mechanism 4, and when the lower piezoelectric stack cannot work or cannot provide corresponding pressure, the upper piezoelectric stack is powered on and works. The embodiment can effectively limit the disturbance of the ejector pin 2 releasing process to the test mass by driving the movement of the micro ejector pin 2 with high precision.
[0063] In an alternative embodiment, the device further comprises a fixing pin 8 fixed to the end portion of the driving mechanism 4, and the axial force sensor 5 is arranged on the outer periphery of the fixing pin 8.
[0064] Further, in an optional embodiment, the upper part of the fixing pin 8 is provided with a protruding structure 801. The outer shell 1 is provided with a sliding groove 101 matching the protruding structure 801 from the end to the middle, and the protruding structure 801 is in sliding connection with the sliding groove 101.
[0065] The fixing pin 8 in the embodiment is used to reinforce the connection tightness of the components in the device, and the protruding structure 801 is used to further limit the possible rotation of the ejector pin 2 and the driving mechanism 4 in the tubular outer shell 1.
[0066] Further, in an optional embodiment, the axial force sensor 5 includes at least two resistance strain gauges, which are oppositely arranged on the outer periphery of the fixing pin 8.
[0067] As an exemplary illustration, two completely identical resistance strain gauges are used to constitute the axial force sensor 5, which are oppositely arranged on the two sides of the fixing pin 8.
[0068] As an exemplary illustration, four completely identical resistance strain gauges are used to constitute the axial force sensor 5, which are oppositely arranged on the front, rear, left and right sides of the fixing pin 8, so as to improve the measurement accuracy.
[0069] In the specific implementation process, in the initial state, the ejector pin 2 is pressed on the piezoelectric stack under the action of the disc spring pre-tightening force, at this time, the ejector pin 2 is not in contact with the test mass, and the piezoelectric stack is not powered.
[0070] In the test working state, first, the test mass is placed between the two devices and constrained by the ejector pin 2, the piezoelectric stack is powered by the controller, the piezoelectric stack generates displacement and applies pressure to the ejector pin 2, so that the ejector pin 2 extends, and the displacement sensor 3 measures the displacement data of the ejector pin 2 in real time. When the ejector pin 2 contacts the test mass and generates pressure, the axial force sensor 5 detects the axial force signal, and the input voltage of the piezoelectric stack is increased by the controller until the axial force sensor 5 detects that the pre-set pre-pressure is applied to the test mass.
[0071] When the controller receives the release command, the controller controls the piezoelectric stack to be quickly powered off, and the piezoelectric stack stops working, and the ejector pin 2 is retracted into the device outer shell 1 under the pressure action of the elastic support 6.
[0072] Embodiment 3
[0073] The embodiment proposes a use method of the release device for integrated measurement of force and displacement, which is applied to the release device for integrated measurement of force and displacement proposed in Embodiment 1 or Embodiment 2. As shown in the figure, it is a flow chart of the use method of the embodiment. Figure 3 As shown in the figure, it is a flow chart of the use method of the embodiment.
[0074] The use method proposed in the embodiment includes the following steps:
[0075] S1, press the ejector pin 2 in the device against the end of the driving mechanism 4 under the pressure of the elastic support 6;
[0076] S2, place the test mass between the two devices and constrain it by the ejector pin 2;
[0077] S3, simultaneously start the driving mechanism 4 in the two devices, the driving mechanism 4 provides driving force to the ejector pin 2, the ejector pin 2 extends axially to the axial force sensor 5 to sense the pressure generated by the contact between the ejector pin 2 and the test mass, the controller sends a control signal to the driving mechanism 4 to make the ejector pin 2 apply a pre-set pre-pressure to the test mass; the displacement sensor 3 and the axial force sensor 5 measure the displacement and axial force of the ejector pin 2 in real time and feed back to the controller for storage;
[0078] S4, when the controller receives a release command, the controller sends a control signal to the driving mechanism 4, the driving mechanism 4 stops working, and the ejector pin 2 is retracted into the device shell 1 under the pressure of the elastic support 6.
[0079] The same or similar reference signs correspond to the same or similar parts;
[0080] The terms used to describe the positional relationship in the drawings are only used for illustrative description, and should not be understood as a limitation on the patent;
[0081] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the claims of the present application.
Claims
1. A release device for force and displacement integrated measurement, characterized by, It comprises a thimble (2), a displacement sensor (3), a driving mechanism (4) and an axial force sensor (5) installed in a tubular shell (1) from bottom to top; wherein: The end of the thimble (2) is sleeved with an elastic support (6) for applying upward pressure to the thimble (2), and the bottom of the thimble (2) is pressed against the driving mechanism (4), and the elastic support (6) applies pre-tightening force to the driving mechanism (4); The displacement sensor (3) is arranged between the bottom of the thimble (2) and the driving mechanism (4) for measuring the relative displacement of the thimble (2) and the shell (1); the displacement sensor (3) comprises a metal wire strain gauge arranged on a flexible sheet; The axial force sensor (5) is arranged in connection with the driving mechanism (4) for measuring the axial force during the release of the thimble (2); The device further comprises a controller for receiving the sensing signals of the displacement sensor (3) and the axial force sensor (5) and controlling the operation of the driving mechanism (4) according to the size of the sensing signals; The device further comprises a fixing pin (8) fixed to the end of the driving mechanism (4); the axial force sensor (5) is arranged in close contact with the outer periphery of the fixing pin (8); the upper part of the fixing pin (8) is provided with a protruding structure (801); the shell (1) is provided with a sliding groove (101) matching the protruding structure (801) from the end to the middle; the protruding structure (801) and the sliding groove (101) are in sliding connection.
2. The force and displacement integrated measuring release device of claim 1, wherein, The elastic support (6) comprises a gasket (601) and a disc spring, the disc spring comprises a plurality of spring leaves (602), and a center ring (603) is stacked between the spring leaves (602).
3. The force and displacement integrated release device of claim 1, wherein, The driving mechanism (4) comprises a piezoelectric stack, the power supply end of the piezoelectric stack is connected with an external power supply module through the controller, and the controller controls the input voltage of the piezoelectric stack.
4. The force and displacement integrated measuring release device of claim 3, wherein, The driving mechanism (4) comprises at least two piezoelectric stacks, and an intermediate gasket (7) is arranged between the adjacent piezoelectric stacks, and the upper and lower surfaces of the intermediate gasket (7) are respectively bonded with the ends of the piezoelectric stacks.
5. The force and displacement integrated release device of claim 3, wherein, The stroke of the driving mechanism (4) is 15-26 μm.
6. The force and displacement integrated measuring release device of claim 1, wherein, The axial force sensor (5) comprises at least two resistance strain gauges arranged opposite to each other on the outer periphery of the fixing pin (8).
7. A method of using a release device for integrated force and displacement measurement as claimed in any one of claims 1 to 6, characterized in that, The method comprises the following steps: The thimble (2) in the device is pressed against the end of the driving mechanism (4) under the pressure of the elastic support (6); The test mass is placed between the two devices and constrained by the thimbles (2); The method comprises the following steps: The thimble (2) in the device is pressed against the end of the driving mechanism (4) under the pressure of the elastic support (6); The test mass is placed between the two devices and constrained by the thimbles (2); The driving mechanism (4) of the two devices is started at the same time, the driving mechanism (4) provides driving force to the ejector pin (2) in the axial direction, the ejector pin (2) extends to the axial force sensor (5) to sense the pressure generated by the contact between the ejector pin (2) and the test mass, and the controller sends a control signal to the driving mechanism (4) to make the ejector pin (2) apply a pre-set pre-pressure to the test mass; the displacement sensor (3) and the axial force sensor (5) measure the displacement and axial force of the ejector pin (2) in real time and feed back to the controller for storage. When the controller receives a release command, the controller sends a control signal to the driving mechanism (4), the driving mechanism (4) stops working, and the ejector pin (2) is retracted into the device shell (1) under the pressure of the elastic support (6).