TWI503529B - Method and device for inspecting focusing precision of condenser - Google Patents

Description

Focusing accuracy detecting method and device for concentrating mirror

The invention relates to a method and a device for detecting focus precision of a concentrating mirror, in particular to use the concentrating principle of a concentrating mirror to detect whether the position of the reflected or refracted ray of the condensing mirror to be tested falls into the receiving portion of the receiving unit, thereby determining the condensing mirror to be tested. Focus accuracy.

Concentrated solar thermal (CST) system is a kind of mirror or lens that concentrates sunlight at a focal position to increase the density of solar energy, and then generates electricity by photoelectric principle or generates heat by photothermal conversion principle. For example, US Patent No. 4287880 "Solar collector" and US4285330 "Concentrating solar collector" are used in the related examples.

However, the mirror may have errors in the manufacturing and shipping process, which affects the focusing effect of the mirror. At present, the way to detect the tolerance of the mirror is usually to visually observe the gap between the block gauge and the curved surface, so it is not easy to be accurate. It is checked whether the amount of error throughout the mirror is within the allowable range, and there is often a problem that the heat collecting effect is not good after the detection is passed.

Therefore, in order to improve the shortcomings of the conventional concentrating mirror measurement technique, the inventors have devoted themselves to research and developed a focusing precision detecting method for the concentrating mirror, which first defines one of the first directions and one of the first directions. Two directions, and providing a correction unit and a condensing mirror to be tested, the correction The unit is configured to provide a pair of calibration lines in a second direction, wherein the ideal shape of the condensing mirror to be tested defines that one of the focus positions is in the first direction, and then performing the following steps: A. causing the calibration unit to provide the calibration line And the condensing mirror to be tested has an edge, according to a plane formed by the edge, a reference line is defined in the condensing mirror to be parallel to the plane, and the reference line is aligned to a correct position to be tested, wherein The condensing mirror to be tested is a concave mirror or a condensing lens; B. a ray is incident on the condensing mirror to be tested in a first direction parallel to the first direction, and a receiving unit is disposed at the focus position, and the receiving unit has a receiving And determining, according to whether the light falls into the receiving portion after being reflected or refracted by the condensing mirror to be tested, determining the focusing accuracy of the condensing mirror to be tested.

The method further includes the step C: generating a light generating unit of the foregoing light and a relative rotation of the light-emitting mirror to be tested and/or a relative displacement of the radial direction to change the position of the condensing mirror to be tested.

Further, the condensing mirror is a concave mirror, and step A further provides a rotating laser level in the condensing mirror to be used as the correcting unit for emitting a laser horizontal line as the calibration line and pointing to the reference line. The degree of overlap of the reference line with the horizontal line of the laser to correct the difference of the horizontal plane of the condensable mirror to be measured to adjust the condensable lens to be tested to a correct position to be tested.

Further, the concentrating mirror is a concave mirror, and step A further provides a rotating laser level in the condensing mirror to be emitted to emit a laser horizontal line pointing to the reference line, by which the reference line overlaps with the laser horizontal line. Correcting the difference between the condensing mirror and the horizontal plane to adjust the condensing mirror to be tested to a correct position to be tested, wherein in step A, the reference line of the paraboloid to be tested is parallel to the horizontal plane, and in step B, a vertical ray is used. The ejector produces the aforementioned light.

Further, in step A, a rotating laser level is further arranged in the condensing mirror to be used as the correction unit for emitting a laser horizontal line as the calibration line and pointing to the reference. a line, by the degree of overlap of the reference line with the horizontal line of the laser to correct a difference of the relative illuminance of the condensing mirror to be measured, to adjust the condensing mirror to be tested to a correct position to be tested, and a vertical laser in step B Produce the aforementioned light.

Further, the receiving unit is any one or a combination of a rod body, a light sensor, and a target.

The invention also relates to a focusing precision detecting device for a concentrating mirror, which is used for a condensing mirror to be tested, wherein the condensing mirror to be tested is a concave mirror or a concentrating lens having a focusing position, and another one direction perpendicular to the first direction is defined. And a second direction, the detecting device comprises: a correcting unit, configured to provide a pair of calibration lines in a second direction, such that the calibration line and the reference condensing mirror are defined according to a reference line of the edge of the edge Correspondingly, the condensing mirror to be tested is adjusted to a correct position to be tested; a light generating unit is configured to inject a light perpendicular to a plane of the reference line to the concentrating mirror to be tested; a receiving unit is disposed in an ideal shape of the concentrating mirror to be tested In a focus position, the receiving unit has a receiving portion for receiving the light falling into the receiving portion, and determining the focusing accuracy of the condensing mirror to be tested according to whether the light of the light generating unit falls into the receiving portion.

Further, the reference line of the condensing mirror to be tested is parallel to the horizontal plane, and the light generating unit is a vertical laser.

Furthermore, a rotating laser level is included as the aforementioned correction unit, and is disposed in the condensing mirror to be tested for emitting a laser horizontal line as the calibration line and pointing to the reference line.

Furthermore, an adjusting unit is connected to the vertical laser or/and the condensing mirror to be tested for adjusting the relative rotation or/and the radial relative displacement of the vertical laser and the condensing mirror to be measured, so as to change the measuring condensing mirror to be tested. s position.

Further comprising an adjusting unit connected to the light generating unit or/and the condensing mirror to be tested for adjusting a relative rotation or/and a radial relative displacement of the light generating unit and the condensing mirror to be measured, so as to change the position of the condensing mirror to be tested. .

Further, the receiving unit is any one or a combination of a rod body, a light sensor, and a target.

The effect of the invention is:

1. The invention utilizes the principle of "reflection or refraction of incident light to focus position" of the condensing mirror, and determines whether the condensing mirror to be tested is accurate according to whether the light reflected or refracted by the condensing mirror to be tested falls into the receiving portion of the receiving unit.

2. The invention utilizes an adjusting unit to measure the focusing accuracy of the condensing mirror to be tested by measuring the relative rotation of the light generating unit relative to the condensing mirror to be tested or/and the radial direction.

3. The focus accuracy detecting method of the present invention can be applied to various types of condensing mirrors, such as a dish-shaped concave mirror, a groove-shaped concave mirror, a condensing lens, and the like.

(1) (1A) ‧‧‧Light Generation Unit

(11) ‧‧‧Light

(2) (2B) (2C) ‧ ‧ receiving unit

(21)‧‧‧ Fixing frame

(22) ‧‧‧Receiving Department

(3) ‧‧‧Adjustment unit

(32) ‧‧‧Support

(33)‧‧‧ poles

(34) ‧‧ ‧ rail seat

(35) ‧‧‧ Space

(4) ‧ ‧ calibration unit

(41)‧‧‧ calibration line

(A) (A01) (A02) (A03) (A04) ‧ ‧ concentrator to be tested

(A1) (A11) ‧‧‧ edge

(A2) ‧ ‧ baseline

(A3) ‧ ‧ focus position

(A4) ‧‧‧ reflected light position

[First Figure] is a schematic perspective view of the accuracy detecting device of the first embodiment of the present invention.

[Second figure] is a side view of the accuracy detecting device of the first embodiment of the present invention and a cross-sectional view of the condensing mirror to be tested.

[Third Figure] is a flow chart showing the steps of the accuracy detecting method of the first embodiment of the present invention.

[Fourth figure] is a schematic diagram showing a state in which a reference line is defined by an edge of a condensing mirror to be tested according to a first embodiment of the present invention.

[Fifth Graph] is a schematic diagram showing a state in which the tilt angle of the condensing mirror to be tested is corrected by the rotating laser level in the first embodiment of the present invention.

[Sixth Diagram] is a schematic diagram showing a state in which the tilt angle correction of the condensing mirror to be tested is completed according to the first embodiment of the present invention.

[Seventh] is a schematic view showing a state in which light is incident on a condensing mirror to be tested by a light generating unit according to a first embodiment of the present invention.

[Eighth image] is a schematic view showing a state in which the condensing mirror to be tested reflects light to the receiving unit according to the first embodiment of the present invention.

[Ninth aspect] is a schematic diagram showing a state in which the position of the reflected light is obtained by the receiving unit in the first embodiment of the present invention.

[Tenth Graph] is an adjustment diagram for adjusting the incident position of light of the light generating unit according to the first embodiment of the present invention.

[11th] is a diagram showing a second embodiment of the adjusting device of the present invention.

[Twelfth Figure] is a third embodiment of a concave mirror having a long groove shape as a condensing mirror to be tested in the present invention.

[Thirteenth Figure] is a view showing a fourth embodiment in which the receiving unit of the present invention is in the shape of a pole.

[Fourteenth] is a fifth embodiment of the condensing lens to be tested in the present invention as a condensing lens.

In combination with the above technical features, the main effects of the focus accuracy detecting device of the condensing mirror of the present invention will be clearly presented in the first embodiment. Before describing the first embodiment, the noun used in the first embodiment of the present invention has the following meaning: the surface formed by the parabola rotating along its axis is a paraboloid (disc type), or the parabola extends in the vertical direction of its axis. The surface formed is a paraboloid (groove type), the paraboloid The surface formed by all the alignment lines is called the quasi-surface, and the paraboloid focus position refers to the point of the parabolic parabola, where all incident light parallel to the axis of the paraboloid is reflected by the paraboloid and is collectively focused; and the paraboloid focus position For a trough parabola, the point at which the incident light parallel to the axis of the parabolic profile is reflected by the parabolic profile and co-focused on the cross section of the paraboloid.

It should be noted that the first embodiment will be described as a dish-shaped parabolic mirror, but the invention is not limited thereto. The present invention can also be implemented in a groove-shaped concave mirror and other concave mirrors having a collecting function. Or a condenser lens (such as a Fresnel lens).

Referring to the first and second figures, the focus accuracy detecting device of the concentrating mirror of the present invention is disclosed, comprising a light generating unit (1) and a receiving unit (2), wherein the light generating unit (1) is used for Generate light to a concentrator (A) to be tested. The light generating unit (1) is, for example, a laser generator, a vertical laser generator or the like to provide a collimated, concentrated beam of light.

The receiving unit (2) is configured to receive the reflected light of the light to obtain a reflected light position. The receiving unit (2) is, for example, any one or a combination of a target and a photo sensor, and the main purpose is to obtain the reflected light position. The receiving unit (2) can be mounted on the concentrating mirror (A) to be tested with a fixing frame (21), but not limited thereto, and can also be suspended in the concentrating mirror (A) to be tested, the main purpose is In order to receive the reflected light, of course, it is also possible to measure only the range of the allowable focus accuracy error, and if the light is not reflected to the receiving unit (2), it can be directly regarded as insufficient precision. More specifically, the receiving unit (2) includes a receiving portion (22), and determines whether the condensing mirror (A) to be tested is determined according to whether the light falls into the receiving portion (22) after being reflected by the condensing mirror (A) to be tested. Focus accuracy. Of course, the light beam is preferably visible light, which facilitates direct observation of the accuracy of the focus accuracy by visual observation, but is not limited thereto, because it is only necessary to use the light sensor to determine whether light has been received.

Further comprising an adjusting unit (3) connected to the light generating unit (1) or/and the condensing mirror (A) to be adjusted for adjusting the relative rotation of the light generating unit (1) with the condensing mirror (A) to be tested or/and The relative position of the condensing mirror (A) to be tested is measured by the relative displacement of the condensing mirror (A) to be measured. In the present embodiment, the adjusting unit (3) is a stand for the light generating unit (1) to rotate relative to the condensing mirror (A) to be tested and to move in the radial direction.

A correction unit (4) is used to provide a calibration line (41). In detail, the correction unit (4) is a rotating laser level for generating horizontal lightning rays as the calibration line (41) to assist in correcting the horizontal lightning rays of the tilt angle of the condenser (A) to be tested, so that The condensing mirror (A) to be tested can be adjusted to a correct position to be tested.

Further, in conjunction with the flow chart of the steps of the third figure, the method for detecting the focus accuracy of the concentrating mirror of the present invention is performed by using the foregoing device, which first defines a first direction and a second direction perpendicular to each other, and then performs the following steps:

A. Please refer to the fourth figure and the fifth figure. In this embodiment, one of the planes parallel to the paraboloid is drawn on the inner circumference of the edge (A1) of the opening of the condensing mirror (A) to be tested. The reason why the reference line (A2) [the reference is drawn with the edge (A1) as the reference line is that the edge is relatively easy to ensure accuracy in processing], and the calibration unit (4) is used to generate the calibration line corresponding to the second direction. (41), and the calibration line (41) is directed to the reference line (A2), and then corrects the difference of the reference line (A2) of the condensing mirror (A) to the horizontal plane to adjust the condensing mirror (A) to be tested. To the horizontal level (see the sixth figure), another focus position (A3) is defined according to the ideal shape of a condensing mirror (A) to be tested (as shown in the seventh figure), so that the focus position (A3) is at the first In the direction. Specifically, when the concentrating mirror (A) to be tested is a parabolic concave mirror, the focus position is defined according to the original ideal paraboloid design.

B. Continue to refer to the seventh and eighth figures, using the light generating unit (1) to generate light (11), and perpendicular to the plane of the reference line, incident on the condensing mirror (A) to be tested, and the receiving unit ( 2) is disposed at the focus position (A3) to receive the reflected light of the light (11).

Referring further to the ninth figure, the receiving unit (2) receives the reflected light of the light (11) to obtain a reflected light position (A4), by determining the focus position (A3) and the reflected light position (A4). The focus accuracy of the condensing mirror (A) to be tested can be known from the distance.

Continuing to refer to the tenth figure, the light-generating unit (1) is relatively rotated with the condensing mirror (A) to be tested or/and relatively displaced in the radial direction of the condensing mirror (A) to be tested by using the adjusting unit (3). The focus accuracy of the condensing mirror (A) to be tested can be measured. Specifically, the adjusting unit (3) may be sequentially disposed at four equal-point fixed points of the condensing mirror (A) to be tested, and the position of the light generating unit (1) is oscillated by the adjusting unit (3), and Measuring the relative displacement of the concentrating mirror (A) in the radial direction, the focus accuracy of the condensing mirror (A) to be tested can be completely measured.

Referring to FIG. 11 , a second embodiment of the present invention is disclosed. The adjusting device (3A) includes two supporting portions (32), a rod (33) connecting the two supporting portions (32), and two rails. a seat (34) defines a space (35) between the two supporting portions for the condensing mirror (A01) to be tested, and the two supporting portions (32) are respectively slidably disposed on the two-track seat (44). The support portion (32) can be slid along a longitudinal direction, and the light generating unit (1A) is slidably disposed on the struts (33), and can slide along a lateral direction relative to the struts (33). Thereby, the position of the incident light of the light generating unit (1A) can be changed.

Continuing to refer to the twelfth embodiment, which is a third embodiment of the present invention, revealing that the condensing mirror (A02) to be tested is a long groove-shaped concave mirror, and the receiving unit (2A) is a concave mirror corresponding to the long groove type. The horizontal position of the light position.

Continuing to refer to the thirteenth embodiment, which is a fourth embodiment of the present invention, and discloses that the condensing mirror (A03) to be tested is in the shape of a dish, and is not limited to the single-point focusing position, and may only focus on the condensing mirror to be tested. On the axis of (A03), the receiving unit (2B) can also be in the shape of a pole to determine whether the light is focused on the upright receiving unit (2B).

Continuing to refer to FIG. 14 , which is a fifth embodiment of the present invention, showing that the condensing mirror (A04) to be tested is a condensing lens (eg, a Fresnel lens), and is in a focus position of the condensing lens. A receiving unit (2C) is provided, which can also be used to determine whether the concentrating position falls within a reasonable range of the desired concentrating light.

It should be reiterated that the first embodiment of the present invention is described by a dish-shaped concave mirror. However, the present invention is not limited thereto, and the present invention can also be implemented in a groove-shaped concave mirror and other concentrating functions. The concave mirror or the condensing lens is mainly used as a reference line defined at the edge of the concentrating mirror, and then the ray is incident on the plane of the reference line perpendicular to the plane of the reference line, and the receiving unit can judge the light after the light is reflected or refracted. Focusing accuracy of the condenser to be tested. In addition, the receiving unit is not limited to a flat type, and may be a cross bar shape corresponding to a grooved concave mirror concentrating position or a vertical rod receiving unit, and the main purpose is to determine whether the condensing position is Fall within the reasonable range of the desired concentration.

In view of the foregoing description of the embodiments, the operation and the use of the present invention and the effects of the present invention are fully understood, but the above described embodiments are merely preferred embodiments of the present invention, and the invention may not be limited thereto. Included within the scope of the present invention are the scope of the present invention.

(1) ‧‧‧Light generating unit

(2) ‧‧‧ receiving unit

(21)‧‧‧ Fixing frame

(3) ‧‧‧Adjustment unit

(4) ‧ ‧ calibration unit

(A) ‧ ‧ concentrator to be tested

Claims (9)

A focusing precision detecting method for a concentrating mirror is to first define a first direction and a second direction perpendicular to each other, and provide a correcting unit and a condensing mirror to be tested, wherein the correcting unit is configured to provide a pair of one of the second directions a calibration line, the condensing mirror to be tested is a concave mirror, and the condensing mirror to be tested has a focus position in the first direction according to an original ideal concave design definition, and then performing the following steps: A. causing the correction unit to provide the a calibration line, and the condensing mirror to be tested has an end edge. According to a plane formed by the end edge, a reference line is defined in the condensing mirror to be tested, and the reference line corresponds to the calibration line, and is adjusted to a correct position to be tested. The correct position to be tested is used for a ray perpendicular to the plane to enter the condensing mirror to be tested; B. the ray is incident on the condensing mirror to be tested in parallel with the first direction, and a receiving unit is disposed at the focus position. The receiving unit is a rod body, a light sensor, a target or a combination thereof, and the receiving unit has a receiving portion, and the light is reflected or folded according to the light to be tested. Whether it falls into the receiving portion after shooting, and determines the focusing accuracy of the condensing mirror to be tested. The method for detecting the focus accuracy of the concentrating mirror according to claim 1, further comprising the step C. generating a relative rotation of the light generating unit of the light and the relative movement of the condensing mirror to be tested, and/or the radial direction. The position of the condensing mirror to be tested is measured by change. The method for detecting focus of a concentrating mirror according to the first or the second aspect of the patent application, wherein the step A further comprises: in the condensing mirror to be tested, a rotating laser level is provided as the correcting unit for emitting a ray The horizontal line is used as the calibration line and is directed to the reference line, and the difference between the reference line and the laser horizontal line is corrected to correct the difference of the relative condensing mirror to the horizontal plane to adjust the condensing mirror to be tested to a correct position to be tested. The method for detecting focus of a concentrating mirror according to claim 1, wherein the step A further comprises: in the condensing mirror to be tested, a rotating laser level as a correction unit for emitting a laser horizontal line as the foregoing Calibrating the line and pointing to the reference line, by adjusting the degree of overlap of the reference line with the horizontal line of the laser to correct the difference between the relative concentrating mirror and the horizontal plane to adjust the condensing mirror to be tested to a correct position to be tested, and in step B The light is generated by a vertical laser. A focusing precision detecting device for a concentrating mirror is used for a condensing mirror to be tested, the condensing mirror to be tested is a concave reflecting mirror, and the condensing mirror to be tested has a focus position according to an original ideal concave design definition, and another one is defined to be perpendicular to each other. And a second direction, the detecting device comprises: a correcting unit, configured to provide a pair of calibration lines in a second direction, the reference line and the reference line defined by the condensing mirror to be tested according to the edge of the edge Correspondingly, the condensing mirror to be tested is adjusted to a correct position to be tested, wherein the correct position to be tested is used for a ray perpendicular to the plane to enter the condensing mirror to be tested; a light generating unit is used for incident perpendicular to the reference line The light of the plane is to the condensing mirror to be tested; a receiving unit is disposed at a focus position or a plane of the focus position defined by the ideal shape of the condensing mirror to be tested, and the receiving unit is a rod body, a light sensor, Any one or combination of a target, the receiving unit has a receiving portion for receiving light falling into the receiving portion, and depending on whether the light of the light generating unit is Into the receiving portion, the test determines the condensing lens focusing accuracy. The focusing accuracy detecting device of the concentrating mirror according to claim 5, wherein the reference line of the condensing mirror to be tested is parallel to a horizontal plane, and the light generating unit is a vertical laser. The focusing accuracy detecting device of the concentrating mirror according to claim 6, wherein the correcting unit is a rotating laser level, and is disposed in the condensing mirror to be used for emitting a laser horizontal line as the calibration line. Point to the baseline. The focusing precision detecting device of the concentrating mirror according to claim 6, further comprising an adjusting unit connected to the vertical laser or/and the condensing mirror to be tested for adjusting the vertical laser and the condensing mirror to be tested The relative rotation or/and the radial relative displacement are used to change the position of the condensing mirror to be tested. The focusing precision detecting device of the concentrating mirror according to claim 5, further comprising an adjusting unit connected to the light generating unit or/and the condensing mirror to be tested for adjusting the relative rotation of the light generating unit and the condensing mirror to be tested Or / and radial relative displacement to change the position of the condensing mirror to be measured.