CN113138041A - Universal pressure sensor - Google Patents
Universal pressure sensor Download PDFInfo
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- CN113138041A CN113138041A CN202110605159.6A CN202110605159A CN113138041A CN 113138041 A CN113138041 A CN 113138041A CN 202110605159 A CN202110605159 A CN 202110605159A CN 113138041 A CN113138041 A CN 113138041A
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- shell
- pressure sensor
- spherical shell
- sphere
- distance measuring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/02—Measuring force or stress, in general by hydraulic or pneumatic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
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- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention belongs to the technical field of sensors, and particularly relates to a universal pressure sensor which comprises a sphere-like shell, a detector and a distance measuring device, wherein the detector and the distance measuring device are arranged in the sphere-like shell; the sphere-like shell has elasticity, and isotropic media are sealed in the sphere-like shell; the detector is used for detecting the pressure when the isotropic medium is pressed; the distance measuring device is used for detecting the deformation quantity and the deformation direction of the deformation position when the sphere-like shell is pressed. The universal pressure sensor can detect pressure values in all directions when detecting pressure, can reversely deduce the direction of the stressed force, is arranged at the end part of a mechanical structure, can detect the stressed direction and the stressed size of the end part of the mechanical structure, and provides convenience for stress analysis of the mechanical structure. Meanwhile, the universal pressure sensor can obtain the magnitude of the pressure, estimate the area of the contact surface and distinguish pressure sources in different directions under partial scenes.
Description
Technical Field
The invention belongs to the technical field of sensors, and particularly relates to a universal pressure sensor.
Background
The pressure sensor is the most common sensor in industrial practice, is widely applied to various industrial automatic control environments, and relates to a plurality of industries such as water conservancy and hydropower, railway traffic, intelligent buildings, production automatic control, aerospace, military industry, petrifaction, oil wells, electric power, ships, machine tools, pipelines, medicine and the like.
The pressure sensor can be used for detecting the magnitude of the pressure value, the detection has directionality, the detection precision is high in certain specific directions, and the detection function is not provided or the detection precision is low in other directions. For example, patent application No. 202010996030.8 filed on 2020, 9/21, entitled pressure sensor, in which a pressure sensor is mentioned, comprising a dielectric structure, a first cavity, a second cavity, a laser, a first polarizer, a second polarizer, a crystal and a detector; the first cavity, the second cavity and the crystal are arranged in the medium structure, and the first cavity is connected with the second cavity through the crystal; the first polaroid and the second polaroid are respectively arranged on two sides of the crystal, and the laser and the detector are respectively arranged in the two cavities. This pressure sensor leads to the birefringence of crystal different according to the pressure difference, and the interference spectrum under the different birefringence of rethread detection detects pressure, though can detect the pressure value, nevertheless has certain limitation, only can be in the comparatively accurate detection pressure value of certain orientation, and can not detect the accurate direction of pressure.
Disclosure of Invention
In order to solve the problems, the invention provides a universal pressure sensor, which adopts the following technical scheme:
a universal pressure sensor comprises a quasi-spherical shell, a detection meter and a distance measuring device, wherein the detection meter and the distance measuring device are arranged in the quasi-spherical shell; the sphere-like shell has elasticity, and isotropic media are sealed in the sphere-like shell; the detector is used for detecting the pressure when the isotropic medium is pressed; the distance measuring device is used for detecting the deformation quantity and the deformation direction of the deformation position when the sphere-like shell is pressed.
The above-described gimbal pressure sensor is more preferably: the isotropic medium is a gas, and the detector is a barometer.
The above-described gimbal pressure sensor is more preferably: the sphere-like shell comprises a fixing piece and an elastic spherical shell, and the fixing piece and the spherical shell are sealed into a whole; mounting one end is located in the cavity of spherical shell, be used for doing the detection meter distance measuring device provides the mounted position, and the other end extends to the outside of spherical shell for provide the position of external object for universal pressure sensor.
The above-described gimbal pressure sensor is more preferably: one of the spherical shells is sealed with one or more of the fixing pieces.
The above-described gimbal pressure sensor is more preferably: the spherical shell is made of any one of rubber and thermoplastic elastomer materials.
The above-described gimbal pressure sensor is more preferably: the fixing piece is a rigid cylinder, a groove is formed in the side wall of the fixing piece, a protrusion is arranged on the spherical shell, and the protrusion is matched with the groove to seal the spherical shell.
The above-described gimbal pressure sensor is more preferably: still be equipped with the tighrening ring on the mounting, be equipped with the fastening nail on the tighrening ring, the tighrening ring fastening is in the protruding with the cooperation department of recess is located the outside of spherical shell.
The above-described gimbal pressure sensor is more preferably: the distance measuring device is any one of an ultrasonic device, an infrared device and a laser device or a combination thereof.
The above-described gimbal pressure sensor is more preferably: the range unit is infrared device, one range unit includes an infrared emitter and an infrared receiver, infrared emitter with infrared receiver all installs in the spheroid casing, infrared emitter is used for transmitting infrared signal, infrared receiver is used for receiving the warp the infrared signal of spheroid casing reflection.
The above-described gimbal pressure sensor is more preferably: the range unit is ultrasonic device, one range unit includes an ultrasonic transmitter and an ultrasonic receiver, ultrasonic transmitter with ultrasonic receiver all installs in the quasi-spherical shell, ultrasonic transmitter is used for transmitting ultrasonic signal, ultrasonic receiver is used for receiving the warp the ultrasonic signal of quasi-spherical shell reflection.
The above-described gimbal pressure sensor is more preferably: the range unit is laser device, one range unit includes a laser emitter and a laser receiver, laser emitter with laser receiver all installs in the quasi-spherical shell, laser emitter is used for sending laser signal, laser receiver is used for receiving the warp the laser signal of quasi-spherical shell reflection.
The above-described gimbal pressure sensor is more preferably: one or more distance measuring devices are arranged in the spherical shell; one detector is installed in the sphere-like shell.
The above-described gimbal pressure sensor is more preferably: three distance measuring devices and one detecting meter are arranged in the spherical shell; every distance measuring device all corresponds a signal drop point, be equipped with the fixed point on the quasi-spherical casing, one the fixed point and three the signal drop point is located four apex points department that are used for measuring virtual tetrahedron, virtual tetrahedron passes through the change detection pressurized direction of edge length.
Analysis shows that compared with the prior art, the invention has the advantages and beneficial effects that:
the universal pressure sensor is not limited to single-direction measurement, can detect pressure values in all directions when detecting pressure, can reversely deduce the direction of the stressed pressure while detecting the pressure values, is arranged at the end part of a mechanical structure, can detect the stress direction and the stress magnitude of the end part of the mechanical structure, and provides convenience for stress analysis of the mechanical structure. Meanwhile, the universal pressure sensor can obtain the magnitude of the pressure, estimate the area of the contact surface and distinguish pressure sources in different directions under partial scenes.
Drawings
Fig. 1 is a schematic diagram of the internal structure of the gimbal pressure sensor of the present invention.
FIG. 2 is a cross-sectional view of the gimbal pressure sensor of the present invention at the locking ring.
In the figure: 1-a fixing piece; 2-a detector; 3-a distance measuring device; 4-spherical shell; 5-bulge; 6-a fastening ring; 7-fastening nails.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of an internal structure of a universal pressure sensor according to the present invention; FIG. 2 is a cross-sectional view of the gimbal pressure sensor of the present invention at the locking ring.
The invention provides a universal pressure sensor which mainly comprises a sphere-like shell, a distance measuring device 3 and a detecting meter 2, wherein the distance measuring device 3 and the detecting meter are arranged in the sphere-like shell. The sphere-like shell has elasticity, and isotropic media are sealed in the sphere-like shell; the detector 2 is used for detecting the pressure when the isotropic medium is pressed; the distance measuring device 3 is used for detecting the deformation quantity and the deformation direction of the deformation position when the sphere-like shell is pressed.
In the invention, the sphere-like shell has elasticity and can generate elastic deformation when being pressed so as to extrude the isotropic medium sealed in the sphere-like shell, the isotropic medium is compressed after being pressed, and the generated pressure intensity is detected and captured by the detector 2. Meanwhile, when the spherical shell is elastically deformed, the distance between the elastically deformed part and the distance measuring device 3 is changed, the change value is captured by the distance measuring device 3, and the direction of each component of the external force can be estimated after the change value is detected by the distance measuring device 3. The universal pressure sensor is not limited to single-direction measurement, can detect pressure values in all directions when detecting pressure, can reversely deduce the direction of the stressed pressure while detecting the pressure values, is arranged at the end part of a mechanical structure, can detect the stress direction and the stress magnitude of the end part of the mechanical structure, and provides convenience for stress analysis of the mechanical structure. The universal pressure sensor can not only obtain the pressure, but also estimate the area of the contact surface, and can distinguish pressure sources in different directions under partial scenes.
It should be noted that, in the present invention, the sphere-like shell means that the shell has an appearance similar to a sphere, including but not limited to a sphere and an oval sphere, and the outline of the shell is arc-shaped without dead angles. In the present invention, isotropic media refers to media that have the same properties of matter in different directions. In isotropic media, the propagation speed of light is independent of the polarization direction of the light, i.e. light has only one refractive index. In the invention, a single isotropic medium is filled in the whole sphere-like shell, the isotropic medium can be gas (such as air) or water, kerosene and the like, but only can be a single medium and cannot be a combination of the two media, so that refraction at the joint surface of the two media is avoided. When the distance measuring device 3 detects an external force, the state in one region is measured, and the measured pattern is similar to a contour line. For example, if only one depression is detected in the spheroidal shell and the shape of the depression is uniformly deformed outward from the vertex (approximately gaussian distribution), it indicates that the external force is directed perpendicularly to the center of the sphere and the reading of the detector 2 is the magnitude of the external force. If only one depression is measured on the sphere-like shell, but the edge of the depression is elliptic relative to the vertex (and the vertex is at a focus of the ellipse), the stress point is at the focus, the external force can be decomposed into two component forces which are vertical to the center of the sphere and tangential to the surface of the depression along the direction from the vertex to the other focus, the reading of the detector 2 is the vertical component force, and the tangential component force can be calculated according to the focal length and the material property of the sphere-like shell. If a plurality of depressions are measured, a plurality of external forces are indicated, the force components can be calculated by each external force according to the method, the reading of the pressure gauge is the sum of the vertical force components, and the stress magnitude of each part can be calculated proportionally according to the comparison of the deformation degrees of the depressions at each part. In practical application scenarios, the stress situation is rarely a little, in most cases, the stress comes from one or more contact surfaces, if the contact surfaces are approximately circular, the vertex of the depression becomes the largest depression surface, the area of the same depression surface is calculated through measurement, and the contact surface area can be approximately estimated by combining the thickness of the spherical shell and the material property. When applied to a detected actual scene, the approximate distribution of the actual scene is often known and may be actually observed by a camera or the like, for example. Taking the example of measurements in a room, when the pressure is vertically upwards, the force definitely applied is that of the ground, the pressure is derived from the ground, when the pressure is oriented horizontally, the force definitely applied is that of the wall, the pressure is derived from the wall, when the pressure is neither horizontal nor vertical, it may be from stones on the ground, etc.
Furthermore, in the invention, the isotropic medium is gas, which not only can satisfy the isotropic property, but also can well satisfy the property of compression under pressure (gas can be compressed when being compressed, and cannot cause outward expansion of other places in the sphere-like shell, the algorithm model is simple, and when water and kerosene are adopted, the gas is compressed at one place, and other areas are slightly expanded, so the algorithm model is more complex). Correspondingly, the detecting gauge 2 is a barometer, and can accurately detect the pressure generated by the pressurized gas.
Further, in the invention, the sphere-like shell comprises a fixing piece 1 and a spherical shell 4 with elasticity, and the fixing piece 1 and the spherical shell 4 are sealed into a whole. The one end of mounting 1 is located the cavity of spherical shell 4, can provide range unit 3 and the mounted position who detects meter 2, the range unit 3 of being convenient for and the installation that detects meter 2, the other end of mounting 1 extends to the outside of spherical shell 4, as the position of the external object of universal pressure sensor, can provide the position of external object for universal pressure sensor.
Further, in the present invention, the spherical shell 4 and the fixing member 1 can be combined in various ways, and specifically, when installed at the end of the mechanical structure, one spherical shell 4 and one fixing member 1 are sealed together, which can provide an installation position for the mechanical structure, for the place where rigid collision needs to be avoided, such as the foot end of a legged robot; at the crossing place of installing a plurality of mechanical structure, a spherical shell 4 is sealed as an organic whole with a plurality of mounting 1, a plurality of mounting 1 and a plurality of mechanical structure one-to-one, and every mechanical structure connects and all connects a mounting 1 to can connect universal pressure sensor between a plurality of mechanical structure, provide research parameter for the mechanical relation between a plurality of mechanical structure.
Further, in the present invention, the spherical shell 4 may be made of a rubber material, a thermoplastic elastomer material, or the like. Specifically, when the spherical shell 4 is made of a selected material, the elastic coefficient, the friction coefficient, the shear strength, the compressive strength and the tensile strength can meet the requirements, the mechanical properties of all the positions of the spherical shell 4 are consistent, the positions where the spherical shell cannot be used are soft and hard, and the interior of the spherical shell can form a reflecting surface meeting the requirements. When in use, the spherical shell 4 has good elasticity, and can also avoid mechanical damage caused by rigid collision.
Further, in the invention, the fixing member 1 is a rigid cylinder, such as a stainless steel column, a groove is formed in the side wall, a protrusion 5 is formed on the spherical shell 4, the protrusion 5 is in interference fit with the groove to seal the spherical shell 4, as a measure for assisting sealing, a sealing rubber layer can be further arranged between the protrusion 5 and the groove, namely, vulcanized rubber is arranged on the circumferential surface of the groove, and the rubber is extruded and deformed when the protrusion 5 and the groove are in interference fit, so that the sealing effect can be better ensured.
Further, in the invention, the fixing piece 1 is also provided with a fastening ring 6, the fastening ring 6 is provided with a notch, and the fastening ring 6 is fastened at the matching part of the protrusion 5 and the groove, so that the isotropic medium can be prevented from overflowing; be equipped with the tighrening pin 7 on the tighrening ring 6, the tighrening pin 7 is located the outside of spherical shell 4, installs in the breach department of tighrening ring 6, and when the tighrening pin 7 was screwed up, the breach of tighrening ring 6 reduced, can further improve the fastening effect.
Further, according to different actual working conditions, one distance measuring device 3 or a plurality of distance measuring devices 3 can be arranged in the spherical shell. In contrast, the pressure value can be detected by only installing one detector 2 in the spheroidal shell.
Preferably, in the invention, three distance measuring devices 3 and one detector 2 are arranged in the spherical shell, so that the algorithm complexity and the processing difficulty can be balanced. Specifically, every range unit 3 all corresponds a signal point of falling, is equipped with the fixed point on the spherical shell, and when the ball chamber was not pressed, through the range unit 3 of zeroing to fixed point and three signal point of falling are the summit, can constitute a virtual tetrahedron for detect pressure direction. One fixed point and three signal drop points are located at the four vertices of the virtual tetrahedron used for measurement. When the virtual tetrahedron is pressed, the length of each edge changes, and the pressing direction and the pressing size of the outer part of the spherical shell can be calculated by combining the reading of the barometer. The distance measuring device 3 scatters to a certain area in front of the transmitting end during detection, and according to actual requirements, if a possible stress range is limited to a small area, only one distance measuring device 3 is needed to measure the small area. When the deformation condition of the spherical shell 4 is determined, besides single device measurement, correction can be carried out on the measurement result of each device from the whole according to the overall material mechanical property of the spherical shell 4, and after the deformation depression condition is obtained, the force decomposition method is consistent with that when the number of the distance measuring devices 3 is one.
Further, in the present invention, the distance measuring device 3 can be implemented in various ways, including but not limited to the distance measuring device 3 being an ultrasonic device, an infrared device, or a laser device.
Specifically, when the distance measuring device 3 is an infrared device, one distance measuring device 3 comprises an infrared emitter and an infrared receiver, the infrared emitter and the infrared receiver are both arranged in a sphere-like shell, the infrared emitter emits infrared signals, and the infrared receiver receives the infrared signals reflected by the shell; when the distance measuring device 3 is an ultrasonic device, one distance measuring device 3 comprises an ultrasonic transmitter and an ultrasonic receiver, the ultrasonic transmitter and the ultrasonic receiver are both arranged in the spherical shell, the ultrasonic transmitter sends out an ultrasonic signal, and the ultrasonic receiver receives the ultrasonic signal reflected by the shell; when range unit 3 is laser device, range unit 3 includes a laser emitter and a laser receiver, and laser emitter and laser receiver all install in the spheroid casing, and laser emitter is used for sending laser signal, and laser receiver is used for receiving the laser signal through the casing reflection.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (10)
1. A gimbaled pressure sensor, comprising:
the device comprises a sphere-like shell, a detector and a distance measuring device, wherein the detector and the distance measuring device are arranged in the sphere-like shell;
the sphere-like shell has elasticity, and isotropic media are sealed in the sphere-like shell;
the detector is used for detecting the pressure when the isotropic medium is pressed;
the distance measuring device is used for detecting the deformation quantity and the deformation direction of the deformation position when the sphere-like shell is pressed.
2. The gimbaled pressure sensor according to claim 1, wherein:
the sphere-like shell comprises a fixing piece and an elastic spherical shell, and the fixing piece and the spherical shell are sealed into a whole;
one end of the fixing piece is positioned in the cavity of the spherical shell and used for providing an installation position for the detector and the distance measuring device, and the other end of the fixing piece extends to the outer side of the spherical shell and used for providing a position of an external object for the universal pressure sensor;
one of the spherical shells is sealed with one or more of the fixing pieces.
3. The gimbaled pressure sensor according to claim 1, wherein:
the distance measuring device is any one of an ultrasonic device, an infrared device and a laser device or a combination thereof.
4. The gimbaled pressure sensor according to claim 1, wherein:
the isotropic medium is a gas, and the detector is a barometer.
5. The gimbaled pressure sensor according to claim 1, wherein:
one or more distance measuring devices are arranged in the spherical shell;
one detector is installed in the sphere-like shell.
6. The gimbaled pressure sensor according to claim 5, wherein:
three distance measuring devices and one detecting meter are arranged in the spherical shell;
every distance measuring device all corresponds a signal drop point, be equipped with the fixed point on the quasi-spherical casing, one the fixed point and three the signal drop point is located four apex points department that are used for measuring virtual tetrahedron, virtual tetrahedron passes through the change detection pressurized direction of edge length.
7. The gimbaled pressure sensor according to claim 2, wherein:
the spherical shell is made of any one of rubber and thermoplastic elastomer materials;
the fixing piece is a rigid cylinder, a groove is formed in the side wall of the fixing piece, a protrusion is arranged on the spherical shell, and the protrusion is matched with the groove to seal the spherical shell;
still be equipped with the tighrening ring on the mounting, be equipped with the fastening nail on the tighrening ring, the tighrening ring fastening is in the protruding with the cooperation department of recess is located the outside of spherical shell.
8. The gimbaled pressure sensor according to claim 3, wherein:
the range unit is infrared device, one range unit includes an infrared emitter and an infrared receiver, infrared emitter with infrared receiver all installs in the spheroid casing, infrared emitter is used for transmitting infrared signal, infrared receiver is used for receiving the warp the infrared signal of spheroid casing reflection.
9. The gimbaled pressure sensor according to claim 3, wherein:
the range unit is ultrasonic device, one range unit includes an ultrasonic transmitter and an ultrasonic receiver, ultrasonic transmitter with ultrasonic receiver all installs in the quasi-spherical shell, ultrasonic transmitter is used for transmitting ultrasonic signal, ultrasonic receiver is used for receiving the warp the ultrasonic signal of quasi-spherical shell reflection.
10. The gimbaled pressure sensor according to claim 3, wherein:
the range unit is laser device, one range unit includes a laser emitter and a laser receiver, laser emitter with laser receiver all installs in the quasi-spherical shell, laser emitter is used for sending laser signal, laser receiver is used for receiving the warp the laser signal of quasi-spherical shell reflection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110605159.6A CN113138041A (en) | 2021-05-31 | 2021-05-31 | Universal pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110605159.6A CN113138041A (en) | 2021-05-31 | 2021-05-31 | Universal pressure sensor |
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| CN113138041A true CN113138041A (en) | 2021-07-20 |
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| CN202110605159.6A Pending CN113138041A (en) | 2021-05-31 | 2021-05-31 | Universal pressure sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567026A (en) * | 2021-08-09 | 2021-10-29 | Oppo广东移动通信有限公司 | Limb part and intelligent machine device |
| CN114964603A (en) * | 2022-07-29 | 2022-08-30 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Underground water data monitoring method and system |
-
2021
- 2021-05-31 CN CN202110605159.6A patent/CN113138041A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567026A (en) * | 2021-08-09 | 2021-10-29 | Oppo广东移动通信有限公司 | Limb part and intelligent machine device |
| CN114964603A (en) * | 2022-07-29 | 2022-08-30 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Underground water data monitoring method and system |
| CN114964603B (en) * | 2022-07-29 | 2022-12-20 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Underground water data monitoring system and monitoring method applying same |
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