TW201910719A - Displacement detecting device and measuring method of object displacement - Google Patents

Abstract

The invention discloses a displacement sensor device and object displacement measurement method. The displacement sensor device comprises a light-emitting element, a optical element, a light splitting element and a sensing element, wherein the sensing element will reflect the different sensing changes of the light when the object moves between the light splitting element and the sensing element or when the object moves between the light splitting element and the optical device; wherein the displacement of the object is measured through the light sensing changes of the sensing element that is generated corresponding to the movement of the object. The displacement sensor device of the invention achieves the purpose of using the displacement sensor device to accurately and instantly collecting and monitoring the changes in the displacement of the object, and solves the technical problem in the prior art that the displacement sensor device measures the displacement of the object at low precision.

Description

   Displacement detection device and method for measuring object displacement   

The invention relates to the field of luminescence sensing, in particular to a displacement detection device and a method for measuring the displacement of an object.

The position detection sensor is a device that detects the position of an object. The position of the object is obtained by detecting the position of the object, and the corresponding control operations are performed according to the state of the object. The position detection sensor can be applied to the displacement of the workpiece , Size, surface state and on-line detection of vibration, eccentricity, clearance, stroke and other motion states, as well as spatial 3D displacement detection and robot ranging.

At present, position detection sensors mainly include a light-emitting element and a light-receiving element. The light-receiving element is a photodiode. The light-emitting element converts electricity into light, and the light is projected onto the light-receiving element. The light-receiving element converts the light into The electrical signal, the control unit determines the presence or proximity of the external object according to the electrical signal. Specifically, when there is no obstruction between the light-emitting element and the light-receiving element, all the light emitted by the light-emitting element will hit the light-receiving element. When a measured object is located between the light-emitting element and the light-receiving element, the measured object will block a part of the light. At this time, the light-receiving element detects that the object passes through according to the detected light. At this time, the control unit judges the light-emitting element and the light-emitting element based on the signal of the light-receiving element. Objects pass or approach between light receiving elements.

However, the above position detection sensor can only detect whether the object is passing or approaching, and cannot detect a change in displacement during the movement of the object.

In view of the above problems, the object of the present invention is to provide a displacement detection device and a method for measuring the displacement of an object, so as to achieve the high-precision measurement of the displacement of the object.

To achieve the above object, the present invention provides a displacement detection device. The displacement detection device includes: a light emitting element for providing a light; and an optical element disposed on a side of the light emitting element for converting the light. Forming a parallel beam; a beam splitting element disposed on one side of the optical element for dividing the parallel beam into a plurality of parallel beams; and a sensing element disposed on one side of the beam splitting element; wherein when an object When located between the light splitting element and the sensing element or between the light splitting element and the optical element, the object shields a portion of the parallel light rays, and the object allows another portion of the parallel light rays to be projected onto the sensing element. , The sensing element generates a light sensing; wherein, when the object moves between the spectroscopic element and the sensing element or when the object moves between the spectroscopic element and the optical element, the sensing element Different light sensing changes are reflected; wherein the displacement of the object is measured through the light sensing change of the sensing element that is generated when the object is displaced.

Preferably, the displacement detection device further includes a fixing frame.

Preferably, the light emitting element is one of a light emitting diode, a laser diode, a solid state laser, a liquid laser, a gaseous laser, an excimer laser, and an optical fiber laser, or any combination of at least two of them.

Preferably, the displacement detecting device further includes a fixing frame, wherein the light emitting element, the optical element and the light splitting element are disposed on the same side of the fixing frame.

Preferably, it further comprises a fixing frame, wherein the sensing element is disposed on the other side of the fixing frame.

Preferably, the displacement detection device further includes a fixing frame, wherein the light emitting element, the optical element, and the beam splitting element are disposed on the same side of the fixing frame, and the sensing element is disposed on the same side of the fixing frame. Or, the light emitting element and the optical element are disposed on the same side of the fixed frame, and the light splitting element and the sensing element are disposed on the same side of the fixed frame.

Preferably, the displacement detection device further includes a processing element for processing a light sensing change of the sensing element and generating a displacement value of the object.

Preferably, the light includes visible light and invisible light.

Preferably, the optical element is a single convex optical element or lens, or the optical element is a double convex optical element or lens.

Preferably, the beam splitting element includes one of a grating, a beam splitter, a prism, a beam splitting optical film, a fiber coupler, and a photonic crystal element, or any combination of at least two of them.

Preferably, the light splitting element includes a plurality of light transmitting ports or light transmitting windows.

Preferably, the displacement detecting device further includes a fixing frame, wherein the fixing frame has a U-shaped structure.

Preferably, the displacement detecting device further includes a fixing frame, wherein the material of the fixing frame is any one or a combination of at least two of silicon rubber, thermosetting gel, and epoxy resin.

Preferably, the displacement detection device further includes a fixing frame, wherein the fixing frame has a light emitting surface.

Preferably, the displacement detection device further includes a fixing frame, wherein the fixing frame has a light-receiving surface.

Preferably, an object displacement measurement space is provided between the light emitting surface and the light receiving surface.

Preferably, the sensing element includes one or at least two of a position sensor (PSD), a light-coupled sensing element (CCD), a field effect semiconductor sensing element (CMOS), and a semiconductor sensing element. Any combination of groups.

Preferably, the displacement detection device further includes: a processing element electrically connected to the sensing element for processing a light sensing change of the sensing element and generating a displacement value of the object; and a display element Is electrically connected to the processing element and used to display the displacement value of the object.

Preferably, the optical element is located between the light emitting element and the light splitting element.

Preferably, the light splitting element is located between the optical element and the sensing element.

Preferably, an object displacement measurement space is provided between the spectroscopic element and the sensing element.

Preferably, an object displacement measurement space is provided between the spectroscopic element and the optical element.

The invention also provides a method for measuring the displacement of an object, including: providing a light emitting element for providing a light; providing an optical element for converting the light into a parallel light beam; providing a beam splitting element for the parallel light beam Divided into a plurality of parallel rays; providing a sensing element; when an object is located between the beam splitting element and the sensing element or between the beam splitting element and the optical optics, the object blocks a portion of the parallel rays , The object allows the parallel light of another part to be projected onto the sensing element, and the sensing element generates a light sensing; when the object moves between the spectroscopic element and the sensing element or when the object is in the When the spectroscopic element and the optical element are moved, the sensing element reflects different light sensing changes; and the displacement of the object is measured through the light sensing changes of the sensing element that are generated when the object is displaced.

Preferably, the light-emitting element is a light-emitting diode, a laser diode, a solid-state laser, a liquid laser, a gas-phase laser, an excimer laser, and an optical fiber laser, or any combination of at least two of them.

Preferably, the method for measuring the displacement of the object further includes: providing a processing element for processing a change in light sensing of the sensing element to generate a displacement value of the object.

Preferably, the light includes visible light and invisible light.

Preferably, the optical element is a single convex optical element or lens, or the optical element is a double convex optical element or lens.

Preferably, the beam splitting element includes one of a grating, a beam splitter, a prism, a beam splitting optical film, a fiber coupler, and a photonic crystal element, or any combination of at least two of them.

Preferably, the light splitting element includes a plurality of light transmitting ports or light transmitting windows.

Preferably, the sensing element includes one or at least two of a position sensor (PSD), a light-coupled sensing element (CCD), a field effect semiconductor sensing element (CMOS), and a semiconductor sensing element. Any combination of groups.

Preferably, the method for measuring the displacement of the object further includes: providing a processing element electrically connected to the sensing element for processing the light sensing change of the sensing element and generating a displacement value of the object; and providing A display element is electrically connected to the processing element and used for displaying the displacement value of the object.

Preferably, the optical element is located between the light emitting element and the light splitting element.

Preferably, the light splitting element is located between the optical element and the sensing element.

Preferably, an object displacement measurement space is provided between the spectroscopic element and the sensing element.

Preferably, an object displacement measurement space is provided between the spectroscopic element and the optical element.

The invention also provides a displacement detection device, comprising: a light emitting diode for providing a light; a lens disposed on one side of the light emitting diode for converting the light into a parallel light beam; a grating Is disposed on one side of the lens to divide the parallel beam into a plurality of parallel rays; and a position sensor (PSD) is disposed on one side of the grating; wherein when an object is located on the grating and the When between the position sensors or between the grating and the lens, the object shields a part of the parallel light rays, the object allows another part of the parallel light rays to be projected to the position sensor, the position sensor A light sensor is generated; wherein when the object moves between the grating and the position sensor or when the object moves between the grating and the lens, the position sensor reflects different lights Sensing change; wherein the displacement of the object is measured through the light sensing change of the position sensor corresponding to the displacement of the object.

Preferably, the displacement detection device further includes a fixing frame, wherein the light-emitting diode, the lens and the grating are disposed on the same side of the fixing frame, and the position sensor is disposed on the same side of the fixing frame. Or the light emitting diode and the lens are disposed on the same side of the fixed frame, and the grating and the position sensor are disposed on the same side of the fixed frame.

Preferably, the displacement detection device further includes a processing element for processing the light sensing change of the position sensor and generating a displacement value of the object.

Preferably, the light includes visible light and invisible light.

Preferably, the lens is a single convex lens or a double convex lens.

Preferably, the grating includes a plurality of light transmission ports or light transmission windows.

Preferably, the displacement detecting device further includes a fixing frame, wherein the fixing frame has a U-shaped structure.

Preferably, the displacement detecting device further includes a fixing frame, wherein the material of the fixing frame is any one or a combination of at least two of silicon rubber, thermosetting gel, and epoxy resin.

Preferably, the displacement detecting device further includes a fixing frame, wherein the fixing frame has a light emitting surface.

Preferably, the displacement detection device further includes a fixing frame, wherein the fixing frame has a light-receiving surface.

Preferably, an object displacement measurement space is provided between the light emitting surface and the light receiving surface.

Preferably, the displacement detection device further comprises: a processing element electrically connected to the position sensor, for processing a light sensing change of the position sensor, and generating a displacement value of the object; and The display element is electrically connected to the processing element and is used for displaying the displacement value of the object.

Preferably, the lens is located between the light-emitting diode and the grating.

Preferably, the grating is located between the lens and the position sensor.

Preferably, an object displacement measurement space is provided between the grating and the position sensor.

Preferably, there is an object displacement measurement space between the grating and the lens.

The invention also provides a method for measuring the displacement of an object, comprising: providing a light emitting diode for providing a light; providing a lens for converting the light into a parallel light beam; providing a grating for the parallel light beam Divided into a plurality of parallel rays; providing a position sensor; when an object is located between the grating and the position sensor or between the grating and the lens, the object shields a part of the parallel rays, the The object allows the parallel light of another part to be projected to the position sensor, and the position sensor generates a light sensor; when the object moves between the grating and the position sensor or when the object is in the When the grating and the lens move, the position sensor reflects different light sensing changes; and the displacement of the object is measured through the light sensing changes of the position sensor corresponding to the displacement of the object.

The invention also provides a displacement detection device, comprising: a light emitting element for providing a plurality of parallel light rays; and a sensing element disposed on one side of the light emitting element; wherein, when an object covers a part of the parallel light beams, Light, the object allows the parallel light of another part to be projected to the sensing element, and the sensing element generates a light sensing; wherein, when the object moves, the sensing element will reflect different light sensing changes ; Wherein the change in light sensing of the sensing element corresponding to the displacement of the object is used to measure the displacement / speed / size of the object.

The invention also provides a displacement detection device, comprising: a light-emitting diode for providing a plurality of parallel light; and a position sensor disposed on one side of the light-emitting diode; wherein, when an object is shielded One part of the parallel light, the object allows the other part of the parallel light to be projected to the position sensor, and the position sensor generates a light sensor; wherein when the object moves, the position sensor will Different light sensing changes are reflected; among them, the light sensing change of the position sensor generated when the object is displaced is used to measure the displacement / speed / size of the object.

The displacement detection device provided in this embodiment includes a light emitting element, an optical element, a light splitting element, and a sensing element. In this way, the light splitting element can divide a parallel light beam into multiple parallel light rays, and the multiple parallel light rays can be connected with the sensor. The light-sensitive areas of the sensing element correspond one-to-one, so that when an object moves on one side of the spectroscopic element and blocks some of the light, the sensing element can accurately sense the light change according to the corresponding relationship with the parallel light. The change can measure the change of the displacement of the object. Compared with the prior art, the displacement detection device in this application uses a parallel light with a secondary optical adjustment through a sensing element and a light source, which greatly improves the sensitivity of the displacement detection device. The purpose of the high-accuracy and timely collection and monitoring of the displacement of the object by the displacement detection device is to make the measurement of the displacement of the object more accurate and safe, and to obtain the change of the position of the object more conveniently and quickly. Technical problems with low measurement accuracy.

In order to make the above-mentioned objects, technical features, and advantages more comprehensible, the following detailed description is made by using preferred embodiments in conjunction with the accompanying drawings.

101‧‧‧light-emitting element

102‧‧‧optical element

103‧‧‧ Light

104‧‧‧ Beamsplitter

105‧‧‧ parallel rays

106‧‧‧ sensing element

107‧‧‧ objects

108‧‧‧ fixed frame

109‧‧‧Translucent mouth

110‧‧‧light surface

111‧‧‧ Glossy surface

112‧‧‧ Parallel Beam

301‧‧‧processing element

302‧‧‧Display element

303‧‧‧Communication components

304‧‧‧Memory element

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are Some embodiments of the invention, for those skilled in the art, can obtain other drawings according to these drawings without paying creative labor.

FIG. 1A is a schematic cross-sectional structure diagram of an object located between a light-splitting element and a sensing element in a displacement detection device according to a first embodiment of the present invention; FIG. 1B is an object located between a light-splitting element and a light-splitting element in a displacement detection device according to the first embodiment of the present invention; Schematic diagram of the cross-section structure between optical elements; Figures 2A-2B are schematic diagrams of the three-dimensional structure of the displacement detection device measuring the displacement of an object along the X direction according to the first embodiment of the present invention; and Figures 3A-3B are the first embodiment of the present invention. Schematic diagram of the three-dimensional structure of the displacement detection device measuring the displacement of the object along the Y direction; FIG. 4 is a schematic diagram of the circuit block structure of the displacement detection device according to the first embodiment of the present invention; FIG. 5 is an object provided by the second embodiment of the present invention FIG. 6 is a schematic flowchart of a method for measuring displacement of an object according to a fourth embodiment of the present invention.

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example one

FIG. 1A is a schematic cross-sectional structure diagram of an object located between a spectroscopic element and a sensing element in a displacement detection device according to a first embodiment of the present invention, and FIG. 1B is an object located between the spectroscopic element and a spectroscopic element in a displacement detection device according to the first embodiment of the present invention. Schematic diagram of the cross-sectional structure between optical elements. Figures 2A-2B are schematic diagrams of the three-dimensional structure of the displacement detection device measuring the displacement of an object along the X direction according to the first embodiment of the present invention. Figures 3A-3B are the first embodiment of the present invention. A schematic diagram of the three-dimensional structure of the displacement detection device for measuring the displacement of an object along the Y direction. FIG. 4 is a schematic structural diagram of a circuit block of the displacement detection device according to the first embodiment of the present invention.

The displacement detection device provided in this embodiment is used to measure the displacement of an object. The displacement detection device can be applied to equipment such as a washing machine, a printer, a scanner, and a projector. The detected component displacement change controls the device to perform corresponding operations. Among them, the displacement detection device can also be applied to any electronic device, equipment or system for detecting the displacement of an object.

Please refer to FIG. 1A to FIG. 4. In this embodiment, the displacement detecting device includes a light emitting element 101, an optical element 102, a light splitting element 104, and a sensing element 106. The light emitting element 101 is used for A light source is provided. The light emitting element 101 is specifically a light emitting diode, a laser diode, a solid-state laser, a liquid laser, a gaseous laser, an excimer laser, and an optical fiber laser. The light emitted by the element 101 includes visible light and invisible light, that is, the light emitted by the light emitting element 101 may be visible light or invisible light, such as laser. The optical element 102 is disposed on one side of the light emitting element 101. The optical element 102 is used to convert the light 103 emitted by the light emitting element 101 into a parallel light beam 112. The optical element 102 may specifically be a single convex optical element or a lens, or an optical element 102 is a lenticular optical element or lens. The light-splitting element 104 is disposed on one side of the optical element 102. Specifically, the light-emitting element 101 is on one side of the optical element 102, and the light-splitting element 104 is on the other side of the optical element 102, that is, the optical element 102 is on the light-emitting element 101 and the light Between the elements 104, the beam splitting element 104 is used to divide the parallel light beam 112 converted by the optical element 102 into a plurality of parallel rays 105. The beam splitting element 104 includes a grating, a beam splitter, a prism, a beam splitting optical film, and a fiber coupler. One or a combination of at least two of a photonic crystal element, for example, the spectroscopic element 104 may be composed of a spectroscope, a grating, and a photonic crystal element. The sensing element 106 is disposed on one side of the spectroscopic element 104. Specifically, the optical element 102 is positioned on one side of the spectroscopic element 104, and the sensing element 106 is positioned on the other side of the spectroscopic element 104, that is, the spectroscopic element 104 is positioned on the optical element 102. And the sensing element 106, where the sensing element 106 faces the beam splitting element 104, so that a plurality of parallel rays 105 divided by the beam splitting element 104 are projected onto the sensing element 106, and the sensing element 106 can be a position sensor (PSD), light-coupled device 106 (Charge-Coupled Device, CCD), field effect semiconductor sensor 106 (Complementary Metal-Oxide-Semiconductor, CMOS), semiconductor sensor 106 (Photo Detector) Preferably, the sensing element 106 is a PSD.

In this embodiment, when an object 107 is located between the spectroscopic element 104 and the sensing element 106 (as shown in FIG. 1A), or an object 107 is located between the spectroscopic element 104 and the optical element 102 (as shown in FIG. 1B) The object 107 shields part of the parallel rays 105. The object 107 allows another part of the parallel rays 105 to be projected onto the sensing element 106. The parallel rays 105 projected on the sensing element 106 make the sensing element 106 produce a light sense. When the object 107 moves between the spectroscopic element 104 and the sensing element 106 or when the object 107 moves between the spectroscopic element 104 and the optical element 102, according to the position, speed and displacement of the object, the light is blocked by the object. Range and the remaining range of light that is not blocked by the object, the sensing element 106 will sense different light sensing changes, so that the displacement of the object 107 is measured according to the corresponding light sensing change when the object 107 is displaced, that is, this embodiment In the embodiment, compared with the prior art, in the present embodiment, because the light splitting element 104 is provided, the light splitting through the light sensing element 106 is used to transmit the light splitting element 104. The parallel light beam 112 is divided into a plurality of parallel light rays 105, so that each of the parallel light rays 105 and the photosensitive area of the sensing element 106 can correspond. When the object 107 moves, when the object 107 blocks the parallel light rays 105 therein, the light sensing element 106 receives light. The area can accurately sense the change of light according to the corresponding relationship with the parallel light 105, and since the parallel light 105 corresponds to the photosensitive area of the sensing element 106, even if the object 107 performs a slight movement, vibration or offset state, the sensing The element 106 can also be sensed, so the displacement detection device provided in this embodiment passes the sensing element 106 and the light source with the parallel optical adjustment 105 of the secondary optical adjustment, which greatly improves the sensitivity of the displacement detection device and realizes the displacement detection. The purpose of the device is to collect and monitor the displacement of the object 107 with high accuracy and timely, so that the displacement measurement of the object 107 is more accurate and safe, and the change of the position of the object 107 is obtained more conveniently and quickly.

Therefore, the displacement detection device provided in this embodiment includes a light emitting element 101, an optical element 102, a beam splitting element 104, and a sensing element 106. The beam splitting element 104 can be divided into a plurality of parallel rays by a parallel beam 112. 105, and a plurality of parallel light rays 105 may correspond to the light-sensitive area of the sensing element 106 one by one. In this way, when the object 107 moves on one side of the beam splitting element 104 and blocks some of the light rays, the sensing element 106 The corresponding relationship of 105 can accurately sense the change in light, so that the change in displacement of the object 107 can be measured according to the change in light. Compared with the prior art, the displacement detection device in this application matches the light source through the sensing element 106. The parallel optical 105 of the secondary optical adjustment greatly improves the sensitivity of the displacement detection device, and achieves the purpose of high-accuracy and timely collection and monitoring of the displacement change of the object 107 by the displacement detection device, thereby making the displacement measurement of the object 107 more accurate and safe. Obtain the change of the position of the object 107 conveniently and quickly, and solve the displacement of the object 107 by the displacement detection device in the prior art Measurement accuracy is not high technical issues.

Further, on the basis of the above embodiment, in this embodiment, in order to facilitate the movement of the object 107 between the spectroscopic element 104 and the sensing element 106, there is an object displacement measurement space between the spectroscopic element 104 and the sensing element 106. In this way, the object 107 can be moved in the object displacement measurement space, or, in this embodiment, since the object 107 can also move between the spectroscopic element 104 and the optical element 102, it is possible to have the object 107 between the spectroscopic element 104 and the optical element 102. An object displacement measurement space, so that the object 107 can be moved in the object displacement measurement space between the spectroscopic element 104 and the optical element 102.

Further, on the basis of the above embodiment, as shown in FIG. 1A, in order to support the light emitting element 101, the optical element 102, the light splitting element 104, and the sensing element 106, a fixing frame 108 is further included in this embodiment. Wherein, the fixed frame 108 includes two ends, and there is space for the object 107 to move between the two ends. Specifically, as shown in FIG. 1A, the light emitting element 101, the optical element 102 and the beam splitting element 104 are located in the fixed frame 108. In one end, the sensing element 106 is located in the other end of the fixed frame 108, and the sensing element 106 is opposite to the light splitting element 104. There is a space between the sensing element 106 and the light splitting element 104 for the object 107 to move, that is, the light emitting element 101 The optical element 102 and the beam splitting element 104 are located on the same side of the fixed frame 108, and the sensing element 106 is located on the other side of the fixed frame 108. Alternatively, in this embodiment, the light emitting element 101 and the optical element 102 may also be located on the fixed frame 108 In one of the ends, the spectroscopic element 104 and the sensing element 106 are located in the other end of the fixed frame 108, and there is a space for the object 107 to move between the optical element 102 and the spectroscopic element 104, that is, the light-emitting element. 101 and the optical element 102 are located on the same side of the fixed frame 108, and the light splitting element 104 and the sensing element 106 are located on the other side of the fixed frame 108. In this embodiment, the light emitting element 101, the optical element 102, the light splitting element 104, and the sensing element The element 106 is assembled into a single unit through the fixing frame 108.

In this embodiment, the fixing frame 108 is specifically a U-shaped structure, so that the space between the U-shaped structures can be used for the object 107 to move.

Wherein, in this embodiment, the material of the fixing frame 108 may specifically be a silicone gel, a thermosetting gel, or an epoxy resin, or a combination of at least two of the silicone gel, a thermosetting gel, and an epoxy resin, such as a silicone gel and a thermosetting resin. The fixing body 108 is made of colloid, or it can also be a fixing frame 108 made of three materials: silicone, thermosetting gel and epoxy.

Further, in this embodiment, the fixing frame 108 has a light emitting surface 110, so that the parallel light beam 112 or the parallel light 105 can be emitted from the light emitting surface 110, and at the same time, the fixing frame 108 also has a light receiving surface 111, so that the light enters and receives When the light surface 111 is on, the light receiving surface 111 can receive these lights. In this embodiment, the light emitting surface 110 and the light receiving surface 111 of the fixing frame 108 are oppositely arranged, and there is a space between the light emitting surface 110 and the light receiving surface 111. A space is measured for the displacement of the object 107 moving.

Further, in this embodiment, in order to process the light sensed by the sensing element 106, this embodiment further includes a processing element 301, the processing element 301 is electrically connected to the sensing element 106, and the processing element 301 It is used to process the light sensing change of the sensing element 106 and generate the displacement value of the object 107. In this embodiment, the communication element 303 and the memory element 304 are also included. As shown in FIG. 4, the communication element 303 and the memory element 304 are respectively connected to the processing element 301, and the processing element 301 stores the obtained displacement value in the memory element 304 for storage.

Further, in this embodiment, a display element 302 is further included, and the display element 302 is electrically connected to the processing element 301 for displaying the displacement value of the object 107.

Further, in this embodiment, in order to make the beam splitting element 104 divide the parallel light beam 112 into a plurality of parallel rays 105, specifically, the beam splitting element 104 includes a plurality of light transmitting ports 109 or light transmitting windows, that is, light passes through the light transmitting ports 109. Or the light transmission window forms a plurality of parallel light rays 105, in which the plurality of light transmission ports 109 or the light transmission windows are parallel to each other and are evenly spaced. Among them, the plurality of light transmission ports 109 or the light transmission windows may be arranged horizontally in parallel, or may be vertical Set in parallel, as long as the beam can be divided into multiple rays parallel to each other.

In this embodiment, specifically, as shown in FIG. 2A, the light-splitting element 204 is disposed on one end of the fixing frame 208, the sensing element 106 is located on the other end of the fixing frame 208, and a plurality of light-transmitting openings are opened on the light-splitting element 204. 209 are arranged in a row at intervals along the X-axis direction. The parallel light emitted by the light-transmitting opening 209 of the spectroscopic element 204 is projected to the sensing element 106. When the object 207 is placed in parallel light and moves in the X-axis direction (as shown in the figure) (Shown in FIG. 2B), under the shielding of the object 207, only a part of the parallel light irradiates the sensing element 106. The sensing element 106 senses the change of the light and transmits the obtained pulse analog electrical signal to the processing element 301. The processing element The obtained electric signal is converted into a digital signal after being amplified and processed by the waveform in 301, and then the displacement of the object is calculated according to the measurement formula. At the same time, the processing element 301 can output the measurement result to the display unit 302 for intuitive display, and can simultaneously display Output to the memory element 304 for storage.

The plurality of light-transmitting openings 209 opened on the light-splitting element 204 may be arranged in multiple rows as shown in FIG. 2A, and as shown in FIG. 3A, the plurality of light-transmitting openings 309 on the light-splitting element 304 may be along the Y axis. Arranged in a row, the beam splitting element 304 is disposed on one end of the fixed frame 308, and the sensing element 106 is positioned on the other end of the fixed frame 308. As shown in FIG. 3A, when the object 307 is placed in parallel light and moves along the Y-axis direction (such as (As shown in FIG. 3B), only a part of the parallel light rays are irradiated onto the sensing element 106 under the obstruction of the object 307. The sensing element 106 senses the change of the light and transmits the obtained pulse analog electrical signal to the processing element 301 for processing. Element 301 converts the obtained electrical signal into digital signal after amplification and waveform processing, and then calculates the displacement of the object according to the measurement formula. At the same time, processing element 301 can output the measurement result to display unit 302 for intuitive display, and At the same time, it is output to the memory element 304 for storage.

It should be noted that the plurality of light-transmitting openings 309 on the light splitting element 304 can also be arranged in a cross shape, so that the object 106 can sense the displacement of the object regardless of whether the object moves along the X axis or the Y axis. Variety.

Example two

FIG. 5 is a schematic flowchart of an object displacement measurement method according to a second embodiment of the present invention.

This embodiment provides a method for measuring the displacement of an object. Specifically, the displacement detection device of the first embodiment is used to measure the displacement of the object. The measurement method is shown in FIG. 5 and includes the following steps:

Step 21): Provide a light-emitting element 101 for providing a light. The light-emitting element 101 is specifically a light-emitting diode, a laser diode, a solid-state laser, a liquid laser, a gas laser, an excimer laser, and an optical fiber laser. One or a combination of at least two or more of them. In this embodiment, the light includes visible light and invisible light, that is, the light emitted by the light emitting element 101 may be visible light or invisible light, such as laser.

Step 22): An optical element 102 is provided for converting light into a parallel light beam 112. The optical element 102 may be a single convex optical element or a lens, or the optical element 102 is a double convex optical element or a lens.

Step 23): Provide a beam splitting element 104 for dividing the parallel light beam 112 into a plurality of parallel rays 105. The beam splitting element 104 includes a grating, a beam splitter, a prism, a beam splitting optical film, a fiber coupler, One of the photonic crystal elements or a group of any combination of at least two of them. For example, the spectroscopic element 104 may be composed of a spectroscope, a grating, and a photonic crystal element.

Step 24): Provide a sensing element 106. When an object 107 is located between the spectroscopic element 104 and the sensing element 106 or between the spectroscopic element 104 and the light-optic element, the object 107 shields a part of the parallel light rays 105, The object 107 allows another part of the parallel rays 105 to be projected onto the sensing element 106, and the sensing element 106 generates a light sensing; wherein the sensing element 106 may specifically be a position sensor (PSD), a light coupling sensing element One of 106 (CCD), field effect semiconductor sensing element 106 (CMOS), and semiconductor sensing element 106. In this embodiment, preferably, the sensing element 106 is a position sensor (PSD), where PSD is The photoelectric element that converts the light point into continuous position data can provide excellent resolution, fast response and excellent linearity characteristics. It can be applied to a wide range of light walls, which makes the displacement detection accuracy of the object higher.

In this embodiment, the optical element 102 is located between the light-emitting element 101 and the light-splitting element 104, and the light-splitting element 104 is located between the optical element 102 and the sensing element 106. In this way, the light emitted by the light-emitting element 101 is installed in parallel through the optical element 102 The light beam 112 and the parallel light beam 112 are divided into a plurality of parallel light beams 112 by the beam splitting element 104. The parallel light beam 112 can be incident on the sensing element 106 when it is not blocked by the object 107, and the sensing element 106 generates a light sensor.

Step 25): When the object 107 moves between the spectroscopic element 104 and the sensing element 106 or when the object 107 moves between the spectroscopic element 104 and the optical element 102, the sensing element 106 reflects different light sensing changes , And the change in light sensing of the sensing element 106 corresponding to the displacement of the object 107 when the object 107 is displaced measures the displacement of the object 107.

Wherein, in this embodiment, the parallel light beam 112 is divided into a plurality of parallel light rays 105 through the light splitting element 104, so that during the movement of the object 107, the sensing element 106 can sense the change of the parallel light rays 105, and measure the position according to the change of light rays. The displacement of the object 107 is shown in this embodiment. Since the parallel light 105 can correspond to the photosensitive area of the sensing element 106, even if the object 107 moves slightly, the sensing element 106 can also sense. Therefore, in this embodiment, When measuring the displacement of the object 107 through the displacement detection device, the sensing element 106 and the light source are matched with the parallel optical adjustment 105 of the secondary optical adjustment to achieve the purpose of high-precision and timely collection and monitoring of the change in the displacement of the object 107, so that the object 107 The displacement measurement is more accurate and safe, and it is more convenient and quick to obtain the change of the position of the object 107, which solves the technical problem that the displacement detection device does not measure the displacement of the object 107 accurately in the prior art.

Further, in this embodiment, in order to process the light sensed by the sensing element 106, this embodiment further includes: providing a processing element 301, the processing element 301 is electrically connected to the sensing element 106, and the processing element 301 is used to process the light sensing change of the sensing element 106 and generate a displacement value of the object 107.

Further, in this embodiment, a display element 302 is further provided, and the display element 302 is electrically connected to the processing element 301 for displaying the displacement value of the object 107.

In order to facilitate the movement of the object 107 between the spectroscopic element 104 and the sensing element 106, there is an object displacement measurement space between the spectroscopic element 104 and the sensing element 106, so that the object 107 can be moved in the object displacement measurement space. In the embodiment, since the object 107 can also move between the beam splitting element 104 and the optical element 102, there can be an object displacement measurement space between the beam splitting element 104 and the optical element 102, so that the object 107 can be moved between the beam splitting element 104 and The object displacement between the optical elements 102 moves in the measurement space.

Further, in this embodiment, in order to make the beam splitting element 104 divide the parallel light beam 112 into a plurality of parallel rays 105, specifically, the beam splitting element 104 includes a plurality of light transmitting ports 109 or light transmitting windows, that is, light passes through the light transmitting ports 109. Or the light transmission window forms a plurality of parallel light rays 105, in which the plurality of light transmission ports 109 or the light transmission windows are parallel to each other and are evenly spaced. Among them, the plurality of light transmission ports 109 or the light transmission windows may be arranged horizontally in parallel, or may be vertical Set in parallel, as long as the beam can be divided into multiple rays parallel to each other.

Example three

This embodiment provides a displacement detection device. Specifically, the displacement detection device includes a light-emitting diode, a lens, a grating, and a PSD, that is, the light-emitting element 101 is a light-emitting diode, and the optical element 102 is a lens. The beam splitting element 104 is a grating and the sensing element 106 is a PSD. Among them, the light emitting diode is used to provide a light, the lens is arranged on one side of the light emitting diode, the lens is used to convert the light into a parallel light beam 112, and the grating is set On the side of the lens, the grating is used to divide the parallel beam 112 into a plurality of parallel rays 105. The PSD is arranged on the side of the grating. Specifically, the lens is located between the light-emitting diode and the grating, and the grating is located on the lens and position sensing. The positional relationship between the light emitting diode, the lens, the grating, and the PSD can be the positional relationship between the light emitting element 101, the optical element 102, the beam splitting element 104, and the sensing element 106 in the first embodiment. There is an object displacement measurement space between the position sensors, so that the object 107 can be easily moved between the grating and the position sensor, or, in this embodiment, it can also be There is an object displacement measurement space between the objects, so that the object 107 can move in the object displacement measurement space between the grating and the lens. In this embodiment, when an object 107 is located between the grating and the position sensor or between the grating and the position sensor, Between the lenses, the object 107 shields part of the parallel rays 105. The object 107 allows another part of the parallel rays 105 to be projected to the position sensor. The position sensor generates a light sensor. Specifically, the target of the PSD A shadow band or light sensing band will be generated on the surface. When the object 107 moves between the grating and the position sensor or when the object 107 moves between the grating and the lens, the position sensor will reflect different light. Sensing change, wherein the light sensing change of the position sensor generated when the object 107 is displaced measures the displacement of the object 107. Specifically, the position of the object 107 is reflected by measuring the left and right offset of the shadow on the PSD target surface The change.

Compared with the prior art, in this embodiment, the parallel light beam 112 is divided into a plurality of parallel light rays 105 through the grating. In this way, each parallel light beam 105 can correspond to the photosensitive area of the PSD. When the object 107 moves, the object 107 is parallel to it. When the light 105 is blocked, the photosensitive area of the PSD can accurately detect the change of light according to the corresponding relationship with the parallel light 105. Moreover, since the parallel light 105 corresponds to the photosensitive area of the PSD, even if the object 107 performs a small movement, vibration or bias The PSD can also detect the change of the parallel light 105 in the shifting state. Therefore, the displacement detection device provided in this embodiment uses the PSD and the light source in combination with the secondary optical adjustment of the parallel light 105 to greatly improve the sensitivity of the displacement detection device. The purpose of the displacement detection device is to collect and monitor the displacement of the object 107 with high accuracy and timely, so that the displacement measurement of the object 107 is more accurate and safe, and the change of the position of the object 107 is obtained more conveniently and quickly.

Wherein, in this embodiment, the PSD can be specifically selected through coating or adhesive material for selective wavelength transmission, so that the PSD can only sense the light emitted by the light emitting diode to achieve the anti-interference function.

In this embodiment, the arrangement of the sensing elements in the PSD is consistent with the direction of the grating, and the orientation of the grating can be adjusted according to the arrangement of the sensing elements in the PSD.

Wherein, in this embodiment, the PSD may be a one-dimensional or two-dimensional PSD. Moreover, the PSD may adopt a linear array PSD, and use DSP to implement program control driving, signal processing and identification, subdivision, calculation, and communication functions of the PSD. The PSD can be set on a circuit board. The circuit board can include processing elements and communication units. The PSD can realize synchronous light reception and transmission of real-time displacement monitoring through the processing unit and communication unit and a remote monitoring center by wireless or wired means.

Further, on the basis of the above embodiment, in this embodiment, in order to support the light emitting diode, the lens, the grating, and the PSD, it further includes: a fixing frame 108, wherein the fixing frame 108 includes two ends, and two There is space for the object 107 to move between the ends. Specifically, the light emitting diode, the lens and the grating are located in one end of the fixed frame 108, and the PSD is located in the other end of the fixed frame 108. The PSD is opposite to the grating, and the PSD and There is space between the gratings for the object 107 to move, that is, the light emitting diode, the lens and the grating are located on the same side of the fixed frame 108, and the PSD is located on the other side of the fixed frame 108. Alternatively, in this embodiment, The diode and the lens are located in one end of the fixed frame 108, the grating and the PSD are located in the other end of the fixed frame 108, and there is a space between the lens and the grating for the object 107 to move, that is, the light emitting diode and the lens are located in the fixed On the same side of the frame 108, the grating and the PSD are located on the other side of the fixed frame 108. In this embodiment, the light emitting diode, the lens, the grating, and the PSD are assembled into an integral part through the fixed frame 108.

In this embodiment, the fixing frame 108 is specifically a U-shaped structure, so that the space between the U-shaped structures can be used for the object 107 to move.

Wherein, in this embodiment, the material of the fixing frame 108 may specifically be a silicone gel, a thermosetting gel, or an epoxy resin, or a combination of at least two of the silicone gel, a thermosetting gel, and an epoxy resin, such as a silicone gel and a thermosetting resin. The fixing body 108 is made of colloid, or it can also be a fixing frame 108 made of three materials: silicone, thermosetting gel and epoxy.

Further, in this embodiment, the fixing frame 108 has a light emitting surface 110, so that the parallel light beam 112 or the parallel light 105 can be emitted from the light emitting surface 110. At the same time, the fixing frame 108 also has a light receiving surface 111, so that the light enters the receiving When the light surface 111 is on, the light receiving surface 111 can receive these lights. In this embodiment, the light emitting surface 110 and the light receiving surface 111 of the fixing frame 108 are oppositely arranged, and there is a space between the light emitting surface 110 and the light receiving surface 111. A space is measured for the displacement of the object where the object 107 moves.

Further, in this embodiment, in order to process the light sensed by the PSD, the embodiment further includes a processing element 301, the processing element 301 is electrically connected to the PSD, and the processing element 301 is used to process the light of the PSD. The change is sensed and the displacement value of the object 107 is generated. That is, in this embodiment, the PSD transmits the obtained pulse analog electric signal to the processing element 301. The processing element 301 converts the obtained electric signal into a digital signal after amplification and waveform processing. , And then calculate the displacement of the object 107 according to the measurement formula.

Further, in this embodiment, it further includes: a display element 302. The display element 302 is electrically connected to the processing element 301 for displaying the displacement value of the object 107. In this way, the processing element 301 can output the measurement result to the display unit for intuitiveness. It is displayed and can be output to the memory element for storage at the same time.

Further, in this embodiment, the light emitted by the light emitting diode includes visible light and invisible light, that is, the light emitted by the light emitting diode may be visible light or invisible light, such as laser.

Further, in this embodiment, the lens may specifically be a single convex lens, or the lens may be a double convex lens.

Further, in this embodiment, in order to make the grating divide the parallel light beam 112 into a plurality of parallel rays 105, specifically, the grating includes a plurality of light transmitting ports 109 or light transmitting windows, that is, light passes through the light transmitting ports 109 or light transmitting windows. A plurality of parallel light rays 105 are formed, in which a plurality of light-transmitting ports 109 or light-transmitting windows are parallel to each other and spaced evenly. Among them, a plurality of light-transmitting ports 109 or light-transmitting windows may be arranged horizontally in parallel, or may be vertically parallel, provided The light beam can be divided into a plurality of parallel light rays. For example, the grating includes five light transmission ports 109 or light transmission windows that are parallel to each other. At this time, the length of the photosensitive area on the PSD is x, and the light is transmitted through the output. Judging the current value, if it is 1/5 or a multiple thereof, the current status can be known, and the digital signal output can be achieved through the characteristics of the PSD chip.

Embodiment 4

FIG. 6 is a schematic flowchart of a method for measuring an object displacement according to a fourth embodiment of the present invention.

This embodiment provides a method for measuring the displacement of an object. Specifically, the displacement detection device of the third embodiment is used to measure the displacement of the object 107. As shown in FIG. 6, the measurement method includes the following steps:

Step 41): providing a light-emitting diode for providing a light;

Step 42): providing a lens for converting light into a parallel light beam 112;

Step 43): providing a grating for dividing the parallel light beam 112 into a plurality of parallel light rays 105;

Step 44): Provide a PSD. When an object 107 is located between the grating and the PSD or between the grating and the light-optical element, the object 107 blocks a part of the parallel rays 105, and the object 107 allows another part of the parallel rays. 105 is projected onto the PSD, and the PSD generates a light sensor. In this embodiment, the lens is located between the light-emitting diode and the grating, and the grating is located between the lens and the PSD. In this way, the light emitted by the light-emitting diode is assembled through the lens. The parallel light beam 112 is divided into a plurality of parallel light beams 112 by a grating. The parallel light beam 112 can be incident on the PSD when it is not blocked by the object 107, and the PSD generates a light sensor.

Step 45): When the object 107 moves between the grating and the PSD or when the object 107 moves between the grating and the lens, the PSD will reflect different light sensing changes and the corresponding PSD generated when the object 107 is displaced through the object 107 The change in light sensing measures the displacement of the object 107.

In this embodiment, the parallel light beam 112 is divided into a plurality of parallel light rays 105 through a grating, so that the PSD can sense the change of the parallel light rays 105 during the movement of the object 107, and measure the displacement of the object 107 according to the change of light rays. In this embodiment, since the parallel light 105 can correspond to the photosensitive area of the PSD, so that even if the object 107 moves slightly, the PSD can sense. Therefore, in this embodiment, the displacement of the object 107 is measured through the displacement detection device. At the same time, the PSD and the light source are matched with the parallel light 105 of the secondary optical adjustment to achieve the purpose of high-precision and timely collection and monitoring of the displacement of the object 107, so that the measurement of the displacement of the object 107 is more accurate and safe, and the object 107 is obtained more conveniently and quickly. The change of position solves the technical problem that the displacement detection device does not measure the displacement of the object 107 accurately in the prior art.

Further, in this embodiment, in order to process the light sensed by the PSD, the embodiment further includes: providing a processing element 301, the processing element 301 is electrically connected to the PSD, and the processing element 301 is used to process the PSD. The light sense changes and generates a displacement value of the object 107. Further, in this embodiment, a display element 302 is further provided, and the display element 302 and the processing element 301 are electrically connected to display the displacement value of the object 107.

Further, in this embodiment, the light includes visible light and invisible light, that is, the light emitted by the light emitting diode may be visible light or invisible light, such as laser.

Further, on the basis of the above embodiment, in this embodiment, in order to facilitate the movement of the object 107 between the grating and the PSD, there is an object displacement measurement space between the grating and the PSD, so that the object 107 can be in the object displacement measurement space. Or in this embodiment, since the object 107 can also move between the grating and the lens, there can be an object displacement measurement space between the grating and the lens, so that the object 107 can be between the grating and the lens The object is moved in the measurement space.

Further, in this embodiment, the lens may specifically be a single convex lens, or the lens may be a double convex lens.

Further, in this embodiment, in order to make the grating divide the parallel light beam 112 into a plurality of parallel rays 105, specifically, the grating includes a plurality of light transmitting ports 109 or light transmitting windows, that is, light passes through the light transmitting ports 109 or light transmitting windows. A plurality of parallel light rays 105 are formed, in which a plurality of light-transmitting ports 109 or light-transmitting windows are parallel to each other and spaced evenly. Among them, a plurality of light-transmitting ports 109 or light-transmitting windows may be arranged horizontally in parallel, or may be vertically parallel, as long as The beam can be divided into a plurality of parallel rays.

Further, in this embodiment, the light emitted by the light emitting diode includes visible light and invisible light, that is, the light emitted by the light emitting diode may be visible light or invisible light, such as laser.

In the description of the present invention, it should be understood that the terms "center", "vertical", "horizontal", "length", "width", "thickness", "top", "bottom", "front", " The orientations or positional relationships indicated by "back", "left", "right", "vertical", "level", "top", "bottom", "inside", "outside", etc. are based on the orientation shown in the drawings Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, structure and operation in a specific orientation, so it cannot be understood as a limitation to the present invention.

In the description of the present invention, it should be understood that the terms "including" and "having" and any variants thereof used herein are intended to cover non-exclusive inclusions, for example, processes that include a series of steps or units, The method, system, product, or device is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or devices.

Unless otherwise specified and limited, the terms "installation," "connected," "connected," and "fixed" should be understood in a broad sense, such as fixed connections, detachable connections, or integration; they can be Directly connected, or indirectly connected through an intermediate medium, can make the internal communication between two elements or the interaction between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

In the end, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or to replace some or all of the technical features equivalently; and these modifications or replacements do not depart from the essence of the corresponding technical solutions of the technical solutions of the embodiments of the present invention. range.

Claims (22)

    A displacement detection device includes: a light-emitting element for providing a light; an optical element disposed on one side of the light-emitting element for converting the light into a parallel light beam; a light-splitting element disposed on the optical element One side is used to divide the parallel light beam into a plurality of parallel light rays; and a sensing element is disposed on one side of the spectroscopic element; wherein when an object is located between the spectroscopic element and the sensing element or located When the beam splitting element and the optical element are in between, the object shields a part of the parallel light rays, the object allows the other part of the parallel light rays to be projected onto the sensing element, and the sensing element generates a light sensing; wherein, When the object moves between the spectroscopic element and the sensing element or when the object moves between the spectroscopic element and the optical element, the sensing element reflects different light sensing changes; The light sensing change of the sensing element corresponding to the displacement of the object measures the displacement of the object.         The displacement detection device according to claim 1, wherein the light emitting element is one or at least two of a light emitting diode, a laser diode, a solid state laser, a liquid laser, a gaseous laser, an excimer laser, and a fiber laser. Any combination of the above.         The displacement detection device according to claim 1, further comprising a fixing frame, wherein the light emitting element, the optical element, and the beam splitting element are disposed on the same side of the fixing frame, and the sensing element is disposed on another side of the fixing frame. On the same side, or the light emitting element and the optical element are disposed on the same side of the fixed frame, and the light splitting element and the sensing element are disposed on the other same side of the fixed frame.         The displacement detection device according to claim 1, further comprising a fixing frame, wherein the fixing frame has a U-shaped structure.         The displacement detection device according to claim 1, further comprising a fixing frame, wherein the fixing frame has a light emitting surface and a light receiving surface, and an object displacement measurement space is provided between the light emitting surface and the light receiving surface.         The displacement detection device according to claim 1, further comprising: a processing element for processing a light sensing change of the sensing element and generating a displacement value of the object; and a display element and the processing The component is electrically connected to display the displacement value of the object.         The displacement detection device according to claim 1, wherein the optical element is a single convex optical element or a lens, or the optical element is a double convex optical element or a lens.         The displacement detection device according to claim 1, wherein the beam splitting element comprises one or at least two of a grating, a beam splitter, a prism, a beam splitting optical film, a fiber coupler, and a photonic crystal element. Any combination of groups.         The displacement detection device according to claim 1, wherein the light splitting element includes a plurality of light transmitting ports or light transmitting windows.         The displacement detection device according to claim 1, wherein the sensing element comprises one of a position sensor PSD, a light-coupled sensing element CCD, a field-effect semiconductor sensing element CMOS, and a semiconductor sensing element.         An object displacement measurement method includes: providing a light emitting element for providing a light beam; providing an optical element for converting the light beam into a parallel beam; providing a beam splitting element for dividing the parallel beam into a plurality of beams; Parallel light; providing a sensing element; when an object is located between the spectroscopic element and the sensing element or between the spectroscopic element and the optical element, the object shields a portion of the parallel light, and the object allows another A part of the parallel light is projected onto the sensing element, and the sensing element generates a light sensing; when the object moves between the spectroscopic element and the sensing element or when the object moves between the spectroscopic element and the optical element When the elements move, the sensing element reflects different light sensing changes; and the displacement of the object is measured through the light sensing changes of the sensing element that are generated when the object is displaced.         The method for measuring the displacement of an object according to claim 11, further comprising: providing a processing element for processing a change in light sensing of the sensing element to generate a displacement value of the object.         The method for measuring the displacement of an object according to claim 12, further comprising: providing a display element electrically connected to the processing element for displaying the displacement value of the object.         The method for measuring an object displacement according to claim 11, wherein the beam splitting element includes one or at least two of a grating, a beam splitter, a prism, a beam splitting optical film, a fiber coupler, and a photonic crystal element Any combination of the above.         The method for measuring the displacement of an object according to claim 11, wherein the light splitting element includes a plurality of light transmitting ports or light transmitting windows.         The method for measuring an object displacement according to claim 11, wherein the sensing element includes one of a position sensor PSD, a light-coupled sensing element CCD, a field effect semiconductor sensing element CMOS, and a semiconductor sensing element.         A displacement detection device includes: a light-emitting diode for providing a light; a lens provided on one side of the light-emitting diode for converting the light into a parallel light beam; and a grating provided on the light-emitting diode. One side of the lens is used to divide the parallel beam into multiple parallel rays; and a position sensor is disposed on one side of the grating; wherein when an object is located between the grating and the position sensor or When located between the grating and the lens, the object shields a portion of the parallel light rays, the object allows the other portion of the parallel light rays to be projected to the position sensor, and the position sensor generates a light sensor; , When the object moves between the grating and the position sensor or when the object moves between the grating and the lens, the position sensor will reflect different light sensing changes; The displacement of the object is measured by the light sensing change of the position sensor corresponding to the displacement of the object.         The displacement detection device according to claim 17, further comprising a fixing frame, wherein the light emitting diode, the lens and the grating are disposed on the same side of the fixing frame, and the position sensor is disposed on the fixing frame. On the other side, or the light emitting diode and the lens are disposed on the same side of the fixed frame, and the grating and the position sensor are provided on the other side of the fixed frame.         The displacement detecting device according to claim 17, further comprising a fixing frame, wherein the fixing frame has a U-shaped structure.         The displacement detecting device according to claim 17, further comprising a fixing frame, wherein the fixing frame has a light emitting surface and a light receiving surface, and an object displacement measurement space is provided between the light emitting surface and the light receiving surface.         The displacement detection device according to claim 17, further comprising a processing element, configured to process a change in light sensing of the position sensor, and generate a displacement value of the object.         The displacement detection device according to claim 21, further comprising a display element electrically connected to the processing element for displaying a displacement value of the object.