TWI401418B - A non-contact method and a device for measuring a distance and positioning - Google Patents

Description

Non-contact distance measuring and positioning method and device thereof

The invention relates to a method and a device for distance measurement and positioning, in particular to a non-contact distance measurement between a measurement and a position of a test object in a non-contact manner and a non-contact distance of the object to be tested. Method and device for measuring and positioning.

In the prior art, the non-contact ranging is mainly an infrared light, an ultrasonic wave, a microwave or a laser as a light source. When the light beam of the light source hits the object to be tested, the bounce beam reflected by the object to be tested is received, and The Time of Flight (TOF) method calculates the distance between the beam and the object to be measured, or uses the phase method to calculate the distance from the object to be tested. However, all of the above methods require the use of sophisticated digital electronic circuits for converting the signal after receiving the bounce beam to provide a distance between the display device and the object to be tested, such as a liquid crystal LCD display device, so that the system requires The cost is high and complex.

Although the accuracy of the measurement is improved by using the above-described apparatus, conventional devices are not suitable for some non-contact ranging (such as teaching) that require simplicity and low cost.

In addition, the above-mentioned devices can only measure the object to be measured by the light source point in one direction, and cannot use the light source to perform positioning at any position in the space.

An object of the present invention is to provide a non-contact distance measurement and positioning method, which utilizes a filling to fill a zoom lens unit to cause a change in the focal length of the zoom lens unit for achieving a relationship with the object to be tested. The measurement of the distance and the positioning of the object to be tested.

Another object of the present invention is to provide a non-contact distance measuring and positioning device, which is configured to adjust a focal length of a zoom lens unit such that a light source is focused through a zoom through unit to achieve a test object. Measurement of the distance between the objects and the positioning of the object to be tested

To achieve the above and other objects, the present invention provides a non-contact distance measurement and positioning method for a test object, the steps comprising: (i) setting a plurality of thin film layers on a zoom lens unit to form Providing a filler; (ii) providing a filler and adjusting a filling unit to the filling amount of the at least one receiving portion by connecting the adjusting unit to the at least one receiving portion; (iii) Adjusting a surface curvature of each of the film layers according to a filling amount of the filling portion filled to the at least one accommodating portion; (iv) generating a plurality of light sources incident on a side of the zoom lens unit having a selectively adjusted focal length And adjusting the surface curvature of each of the film layers to cause each of the light sources to be focused through the zoom lens unit on the other side of the zoom lens unit; (v) when the object to be tested is located at a position where each of the light sources is in focus Changing the filling amount of the filler according to the curvature of the corresponding surface to determine a distance between the zoom lens unit and the object to be tested; and (vi) when the object to be tested is away from each of the positions of the light source According to The distance between them was measured on each of the determined position of the source of the analyte, for achieving positioning of the analyte.

To achieve the above and other objects, the present invention provides a non-contact distance measuring and positioning device for use in a test object comprising a zoom lens unit, an adjustment unit and a light unit. The zoom lens unit has a plurality of film layers, and each of the film layers forms at least one accommodating portion; the adjusting unit is connected to the zoom lens unit, and by selectively providing a filler to the accommodating portion, each The surface of the film layer forms a corresponding surface curvature; the light emitting unit generates a plurality of light sources incident on one side of the zoom lens unit, and emits the light sources on the other side of the zoom lens unit. Wherein, by adjusting the surface curvature of the surface of each of the film layers, each of the light sources is focused by a zoom lens unit having a selectively adjusted focal length, and is determined according to the curvature of the surface and the object to be tested. Distance and location.

Compared with the prior art, the present invention does not need to be controlled with a complicated and complicated control circuit, and can not achieve the distance measurement of the object to be tested and the waiting for the object without receiving and returning the signal from the object to be tested. The location of the object. That is, the present invention proposes a non-contact distance measurement and positioning method, which enables the device to be implemented by the method to have the advantages of being easy to carry, easy to operate, simple in structure, low in cost, and the like.

In order to fully understand the objects, features and advantages of the present invention, the present invention will be described in detail with reference to the accompanying drawings. A flow chart of a method of non-contact distance measurement and positioning of an embodiment. In the embodiment, the non-contact distance measurement and positioning method comprises: starting at step S1, setting a plurality of film layers on a zoom lens unit for forming at least one receiving portion; and then providing a filling in step S2. And adjusting the unit by adjusting the unit to the at least one receiving portion to adjust the filling amount of the filling to the at least one receiving portion; and then filling the at least one according to the filling according to the step S3 The filling amount of the accommodating portion is changed to adjust the surface curvature of each of the film layers; and then, in step S4, the plurality of light sources are incident on one side of the zoom lens unit having the selectively adjusted focal length, and the film layers are adjusted by adjusting the film layers. The surface curvature is such that the light source is focused by the zoom lens unit on the other side of the zoom lens unit; and, by the step S5-1, when the object to be tested is located at the position where each of the light sources is focused, a change in the filling amount of the filler corresponding to the surface curvature for determining a distance between the zoom lens unit and the object to be tested; or in step S5-2, when the object to be tested is separated from each of the light sources When the position of the focus is determined, the position of the object to be tested is determined according to the distance between the light sources on the object to be tested, so as to achieve the positioning of the object to be tested.

Referring to Fig. 2, there is shown a schematic diagram of a non-contact distance measuring and positioning device according to an embodiment of the present invention. In the present embodiment, a non-contact distance measuring and positioning device 1 is used for a DUT 10, which includes a zoom lens unit 2, an adjusting unit 3 and a lighting unit 4. The zoom lens unit 2 has a plurality of film layers 22, and each of the film layers 22 forms at least one receiving portion 24. Each of the film layers 22 has an elastic film which is transparent, elastic and waterproof, for example, the elastic film is a plastic film, a wrap film, a silicone film and a packaging film. The adjusting unit 3 is connected to the zoom lens unit 2, and the surface of each of the film layers 22 is formed to have a corresponding surface curvature by selectively providing a filler 32 to the receiving portion 24, for example, the filler 32 is It can be a liquid or a gas having a high refractive index. Furthermore, referring to FIG. 4, the filling amount of the surface of each of the film layers 22 may be changed by the filling amount of the filling portion 24 by different fillers 32, thereby making the The zoom lens unit 2 generates different focal lengths F1, F2, and F3 corresponding to the changed surface curvature. If parallel light sources are incident, the light sources are focused on the optical axis OA, and the focal lengths fp3, fp2, and fp3 are corresponding. on. Returning to FIG. 2, the light-emitting unit 4 generates a plurality of light sources L1, L2 incident on one side of the zoom lens unit 2, and emits the light sources L1', L2' on the other side of the zoom lens unit 2, and The light sources L1, L2 are focused on the focus point fp1 according to the filling amount of the filler 32 filled in the accommodating portion 24 in the zoom lens unit 2, and the mirror core of the zoom lens unit 2 and the focus fp1 have Focal length F1. When the object to be tested 10 is located at a position (or a focus) at which the light sources L1 ′, L2 ′ are focused, the filling amount of the filler 32 according to the curvature of the corresponding surface is used to determine the zoom lens unit 24 and The distance between the objects 10 to be tested. For example, refer to FIG. 6 , which is a relationship diagram of a corresponding amount of change in focal length generated when the amount of change in the filling amount of the filler acts on the zoom lens unit. In this embodiment, according to the focal length and the filling amount. It is drawn for the relationship of focal length = 47‧ (Δ filling amount) ^-0.8 , and it is understood from the relationship and the relationship diagram that the focal length is inversely related to the filling amount, that is, when the filling is filled in the receiving portion. The more the amount increases, the more the film layer protrudes outward, and the focal length is short, and vice versa.

Therefore, the zoom lens unit 2 is adjusted by the adjusting unit 3, so that the light sources L1 and L2 of the light emitting unit 4 are focused on the object to be tested 10, that is, in the embodiment, only the object to be tested 10 has A spot (that is, the object to be tested 10 is located on the focus fp1), the corresponding focal length can be obtained according to the filling amount of the filler 32 filled in the zoom lens unit 2 by the adjusting unit 3, that is, in the non-contact In the state of the object, the distance measurement from the object to be tested 10 is performed.

Reference is made to Figure 3 which is a schematic illustration of a non-contact distance measuring and positioning device of another embodiment of the present invention. In this embodiment, when the object to be tested 10 is away from the focus fp1 where the light sources L1 ′, L2 ′ are focused, the light spots formed by the light sources L1 ′, L2 ′ according to the object 10 to be tested 10 . The distance d1 between p1 and p2 is used to determine the position of the object to be tested 10, thereby achieving the positioning of the object to be tested 10, that is, according to the distance d1 between the light points p1 and p2, and the light unit is further matched. The distance d2 between the light sources L1 and L2 of 4 is such that by adjusting the relationship between the distance d1 and the distance d2, the position at which the object to be tested 10 can be positioned and set at a distance D from the zoom lens unit 2 is achieved. on.

Referring to Figure 5, there is shown a schematic diagram of a non-contact distance measuring and positioning device of another embodiment of the present invention. In this embodiment, in addition to the above-mentioned components, the non-contact distance measuring and positioning device 1 further includes a concave lens 5 disposed on one side of the zoom lens unit 2 and received from the zoom lens. Each of the light sources L1", L2" emitted from the unit 2 and based on the distance and position from the object 10 to be used for providing a better resolution can also be obtained by the concave lens 5 and the zoom lens unit 2 The combined composite lens allows the focus of the same filler filling amount to change to a position farther from the zoom lens unit 2, that is, the concave lens 5 is used to improve the measurement to be measured at a long focal length. The distance resolution of the object, and the translation corresponding to the curve in Fig. 6 is used to increase the distance resolution at a longer focal length.

Compared with the prior art, the present invention does not need to be controlled with a complicated and complicated control circuit, and can not achieve the distance measurement of the object to be tested and the waiting for the object without receiving and returning the signal from the object to be tested. The location of the object. That is, the present invention proposes a non-contact distance measurement and positioning method, which enables the device to be implemented by the method to have the advantages of being easy to carry, easy to operate, simple in structure, low in cost, and the like.

The invention has been described above in terms of the preferred embodiments, and it should be understood by those skilled in the art that the present invention is not intended to limit the scope of the invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the scope of the invention is defined by the scope of the following claims.

1. . . Non-contact distance measuring and positioning device

2. . . Zoom lens unit

twenty two. . . Film layer

twenty four. . . Housing

3. . . Adjustment unit

32. . . Filler

4. . . Light unit

5. . . concave lens

10. . . Analyte

F1, F2, F3. . . focal length

Fp3, fp2, fp3. . . focus

L1, L2, L1', L2', L1", L2". . . light source

P1, p2. . . light spot

D1, d2, D. . . distance

OA. . . Optical axis

1 is a flow chart of a method for non-contact distance measurement and positioning of an embodiment of the present invention;

2 is a schematic view of a non-contact distance measuring and positioning device according to an embodiment of the present invention;

3 is a schematic diagram of a non-contact distance measuring and positioning device according to another embodiment of the present invention;

Figure 4 is a schematic view showing the relationship between different fillers and surface curvature in Figure 2;

Figure 5 is a schematic view of a non-contact distance measuring and positioning device according to another embodiment of the present invention;

Fig. 6 is a view showing the relationship between the amount of change in the filling amount of the filler of Fig. 2 and the change in the focal length.

S1~S5-2. . . step

Claims (7)

A non-contact distance measurement and positioning method is used for a sample to be tested, the method comprising: setting a plurality of film layers on a zoom lens unit to form at least one receiving portion; providing a filler, and transmitting The at least one receiving portion is connected to one of the adjusting units to adjust a filling amount of the filler to the at least one accommodating portion; and adjusting a surface curvature of each of the film layers, the filling is filled according to the filling to the at least one a filling amount of the accommodating portion; generating a plurality of light sources incident on one side of the zoom lens unit having a selectively adjusted focal length, and adjusting the surface curvature of each of the film layers on the other side of the zoom lens unit The light source is concentrated together at a focus point on an optical axis through the zoom lens unit; when the object to be tested is located at a position where each of the light sources is focused, the filling amount of the filler according to the curvature of the corresponding surface changes, Determining a distance between the zoom lens unit and the object to be tested; and when the object to be tested is away from each of the positions where the light source is focused, according to the distance between the light sources on the object to be tested It determines the distance between the position of the object to be detected and the light produced by each light source of the point of the DUT, for achieving positioning of the analyte. A non-contact distance measuring and positioning device is used for an object to be tested, comprising: a zoom lens unit having a plurality of film layers, and each film layer Forming at least one accommodating portion; an adjusting unit is connected to the zoom lens unit, and by selectively providing a filler to the accommodating portion, the surface of each of the film layers forms a corresponding surface curvature, so that each The light source is collectively concentrated on a focus point on an optical axis through the zoom lens unit with a selectively adjusted focal length; and an illumination unit is configured to generate a plurality of light sources incident on one side of the zoom lens unit, and The other side of the zoom lens unit emits the light source; wherein the surface curvature of each surface of the film layer is adjusted, and the distance between the light sources is determined according to the curvature and selectivity of the surface, and the object to be tested is determined a distance and a position, wherein when the object to be tested is away from the position where each of the light sources is focused, the distance between each of the light sources and the spot on the object to be tested illuminated by the light source are used. distance. The non-contact distance measuring and locating device of claim 2, wherein the zoom lens unit further comprises at least one access hole for allowing the filler in the adjusting unit to pass through the at least one access The mouth enters the at least one receiving portion. The non-contact distance measuring and positioning device according to claim 3, wherein the filling is a liquid or a gas. The non-contact distance measuring and positioning device according to claim 2, wherein each of the film layers has an elastic film which is transparent, elastic and waterproof. The non-contact distance measuring and positioning device according to claim 5, wherein the elastic film is a plastic film, a wrap film, a silicone film and a packaging film. The non-contact distance measuring and positioning device according to claim 2, further comprising a concave lens disposed on one side of the zoom lens unit to receive each of the light sources emitted from the zoom lens unit, and The distance and position between the object and the object to be tested are used to provide a distance resolution of the object under a long focal length.