TWI513951B - Thickness detecting method - Google Patents

Description

Thickness detection method

The present invention relates to a thickness detecting method, and more particularly to a non-contact thickness detecting method.

The general industry uses a vernier scale or a spiral micrometer to measure the thickness of a test object. The following describes the conventional vernier scale.

First, please refer to FIG. 1 , which is a schematic diagram showing a conventional vernier scale. The vernier scale 1 includes a body 11 and a measuring portion 12 .

The body 11 has a first ruler 111 and a second ruler 112. The second ruler 112 is sleeved on the first ruler 111 and can be linearly displaced reciprocally along the first ruler 111.

In addition, the main scale 111a and the sub-scale 112a are respectively scribed on the first ruler 111 and the second ruler 112 for displaying the measured size data after the vernier 1 measures the object to be tested.

The measuring unit 12 has a first claw portion 121 and a second claw portion 122. The first claw portion 121 is fixed to one end of the first ruler portion 111 by a fixing seat 123. The second claw portion 122 is pivotally connected to the second ruler 112, and can change the relative distance between the second claw portion 122 and the first claw portion 121, and can be swung between the first position and the second position to change. Its relative angle with the first claw portion 121.

Specifically, when the second claw portion 122 is in the first position, it is in a state of being parallel to each other with the first claw portion 121, and when the second claw portion 122 is located at the second position, The first claw portions 121 are separated by an acute angle.

In addition, the first claw portion 121 includes a first end 121a of an arc shape, and the second claw portion 122 includes a second end 122a of an arc shape corresponding to the first end 121a.

The user can sandwich the object to be tested 13 between the first claw portion 121 and the second claw portion 122, that is, the object 13 can be obtained by the data displayed by the main scale 111a and the sub-scale 112a. Thickness data.

When the user applies a force to rotate the second claw portion 122 from the first position to the second position, the relative angle between the second claw portion 122 and the first claw portion 121 increases, and between the second quantity end 122a and the first quantity end 121a The distance is also increased, so that the vernier 1 can be easily removed from the measured object 13 to be measured.

It can be seen from the above that the conventional thickness detecting method needs to directly contact the object to be tested by using a tool such as a vernier 1 to measure the thickness of the object to be tested, so it is not suitable for the object to be tested whose surface is a soft material or to be tested while moving. Things.

Conventional thickness detection methods are even less applicable to the production line and achieve rapid screening.

In detail, the use of the vernier 1 requires a more complicated calculation process to obtain the actual thickness of the object to be tested, which will extend the overall detection time, and some programs in the production line do not need to actually calculate the object to be tested. For the thickness, it is only necessary to judge whether the thickness of the object to be tested is within the preset thickness range, so the vernier scale 1 is not applicable.

Furthermore, the operator cannot immediately judge whether the thickness of the object to be tested is within the preset thickness range by the scale on the vernier scale, and is more likely to cause misjudgment due to factors such as calculation errors.

There is therefore a need for an improved thickness detection method to ameliorate the problems of conventional thickness detection methods.

It is an object of the present invention to provide a fast and accurate method of thickness detection.

The main object of the present invention is to provide a thickness detecting method, which comprises the steps of: (A) placing a test object on a horizontal base; and (B) determining whether a first light sensing device senses a first a light emitting device emits a first light beam and determines whether a second light sensing device senses a second light beam emitted by a second light emitting device, wherein the second light emitting device and the second light sensing device The position of the device is higher than the position of the first light emitting device and the first light sensing device; and (C) if the first light sensing device does not sense the first light beam emitted by the first light emitting device and the second light The sensing device senses the second light beam emitted by the second light emitting device, and displays a first signal and determines that one of the thicknesses of the object to be tested is within a predetermined thickness range.

In a preferred embodiment, after step (B), a step (C2) is further included: if the first light sensing device and the second light sensing device respectively sense the first light emitting device A light beam and a second light beam emitted by the second light emitting device display a second signal and determine that the thickness of the object to be tested is less than a predetermined thickness range.

In a preferred embodiment, after step (B), a step (C3) is further included: if neither the first light sensing device nor the second light sensing device senses the first light emitting device The first light beam and the second light beam emitted by the second light emitting device display one The third signal determines that the thickness of the object to be tested is greater than a predetermined thickness range.

In a preferred embodiment, in step (C), step (C2), and step (C3), a controller senses whether the first light sensing device and the second light sensing device respectively sense A light beam and a second light beam cause a signal display to display the first signal, the second signal, and the third signal.

In a preferred embodiment, the first signal in step (C) includes a green light signal and a red light signal.

In a preferred embodiment, the second signal in step (C2) includes two red light signals.

In a preferred embodiment, the third signal in step (C3) includes a second green light signal.

In a preferred embodiment, the method further includes a step before the step (A):

(A1) adjusting the positions of the first light sensing device, the second light sensing device, the first light emitting device and the second light emitting device according to the preset thickness range, so that the distance between the first light beam and the horizontal base is equal to the preset One of the thickness ranges is a lower limit value, and the distance between the second beam and the horizontal pedestal is equal to an upper limit value of one of the preset thickness ranges.

In a preferred embodiment, the first light emitting device and the second light emitting device in step (A1) are disposed on a first pillar, and the first light sensing device and the second light sensing device are disposed on the first light sensing device. In the second pillar, the first pillar is parallel to the second pillar.

In a preferred embodiment, step (A1) further includes: The lengths of the first pillar and the second pillar are adjusted according to a preset thickness range.

In a preferred embodiment, the first light emitting device and the second light emitting device in step (B) emit a laser beam.

In a preferred embodiment, the first photo sensing device and the second photo sensing device in step (B) are photodiodes or photoresistors.

In a preferred embodiment, the first light emitting device and the first light sensing device in step (B) face each other, and the second light emitting device and the second light sensing device face each other.

A thickness detecting method according to a first preferred embodiment of the present invention will now be described.

Referring to FIG. 2, FIG. 2 shows a horizontal pedestal, a first light emitting device, a second light emitting device, a first light sensing device, and a second light in a thickness detecting method according to a first preferred embodiment of the present invention. Schematic diagram of the sensing device, the first pillar, and the second pillar.

First, the first strut 21 and the second strut 22 are both disposed on the horizontal base 23, and the first strut 21 is parallel to the second strut 22.

Next, the first light emitting device 24 and the second light emitting device 25 are disposed on the first pillar 21, and the second light emitting device 25 is located above the first light emitting device 24, the first light sensing device 26 and the second The light sensing device 27 is disposed on the second pillar 22 , and the second light sensing device 27 is located above the first light sensing device 26 .

In this example, the first light emitting device 24 and the second light emitting device 25 can move up and down along the first pillar 21, and the first light sensing device 26 and the second light sensing device 27 can be moved up and down along the second pillar 22 mobile.

Further, the first light emitting device 24 and the first light sensing device 26 face each other, and the second light emitting device 25 and the second light sensing device 27 face each other.

In this example, the first light emitting device 24 and the second light emitting device 25 are used to emit a laser beam, and the first light sensing device 26 and the second light sensing device 27 are photodiodes or photoresistors. The laser beam emitted by the first light emitting device 24 and the second light emitting device 25 is sensed.

Furthermore, in this example, a controller 28 and a signal display 29 are additionally included. Referring to FIG. 2 and FIG. 3 simultaneously, FIG. 3 is a block diagram showing a controller of a first preferred embodiment of the present invention.

The first light sensing device 26 and the second light sensing device 27 are respectively connected to the controller 28, and the controller 28 is connected to the signal display 29, and the controller 28 is based on the first light sensing device 26 and the second light sensing device. 27 whether the light beam emitted by the first light emitting device 24 and the second light emitting device 25 is sensed to cause the signal display 29 to display the first signal b1 (FIG. 5) or the second signal b2 (FIG. 6) or the third signal b3 (Figure 7).

The flow of the thickness detecting method of a first preferred embodiment of the present invention is described below. Referring to FIG. 3, FIG. 4 and FIG. 5, FIG. 4 is a flow chart showing a thickness detecting method according to a first preferred embodiment of the present invention. Fig. 5 is a first schematic view showing an object to be tested in a thickness detecting method according to a first preferred embodiment of the present invention.

First, step (A1) is performed to adjust the positions of the first light sensing device 26, the second light sensing device 27, the first light emitting device 24, and the second light emitting device 25 according to the preset thickness range n~m.

In detail, the first light emitting device 24 will be moved along the first strut 21 until the distance between the first light beam 24a emitted by the first light beam 21 and the horizontal base 23 is equal to the lower limit value n of the preset thickness range n~m, The two light emitting device 25 is moved along the first strut 21 until the distance between the second light beam 25a emitted by the second light beam 21 and the horizontal base 23 is equal to the upper limit m of the predetermined thickness range n~m.

Additionally, the first light sensing device 26 will be moved along the second post 22 to a position where the first light beam 24a can be sensed, and the second light sensing device 27 will be moved along the second leg 22 to be sensible The position of the second light beam 25a.

Next, step (A) is performed to place the object to be tested a1 on the horizontal base 23 as shown in FIG.

Then, the step (B) is performed, and the controller 28 determines whether the first light sensing device 26 senses the first light beam 24a emitted by the first light emitting device 24 and determines whether the second light sensing device 27 senses the first light beam. The second light beam 25a emitted by the two light emitting devices 25.

Since the object to be detected a1 blocks the first light beam 24a and does not block the second light beam 25a, that is, the first light sensing device 26 does not sense the first light beam 24a emitted by the first light emitting device 24 (in FIG. 4 S1=0 indicates that the first light sensing device 26 does not sense the first light beam 24a) emitted by the first light emitting device 24, and the second light sensing device 27 senses that the second light emitting device 25 emits The second light beam 25a (in FIG. 4, S2=1 indicates that the second light sensing device 27 senses the second light beam 25a emitted by the second light emitting device 25), and thus step (C) is performed, and the controller 28 The signal display 29 displays the first signal b1 (a green light signal c and a red light signal d), and the operator judges accordingly The thickness of the measuring object a1 is within a preset thickness range n~m, so that the object to be tested a1 passes the detection.

The following describes the detection situation of the object to be tested a2 which is the same as the object to be tested a1. Referring to FIG. 3 and FIG. 6, FIG. 6 shows the second object to be tested in the thickness detecting method according to a first preferred embodiment of the present invention. schematic diagram.

It should be noted that since the object to be tested a2 and the object to be tested a1 are the same type of object to be tested and have the same preset thickness range n~m, the step (A1) is not necessary.

First, step (A) is performed, and the object to be tested a2 in Fig. 6 is placed on the horizontal base 23.

Then, the step (B) is performed, and the controller 28 determines whether the first light sensing device 26 senses the first light beam 24a emitted by the first light emitting device 24 and determines whether the second light sensing device 27 senses the first light beam. The second light beam 25a emitted by the two light emitting devices 25.

Since the object to be tested a2 does not block the first light beam 24a and the second light beam 25a, that is, the first light sensing device 26 and the second light sensing device 27 sense the first light beam emitted by the first light emitting device 24, respectively. 24a and the second light beam 25a emitted by the second light emitting device 25 (the first light sensing device 26 and the second light sensing device 27 respectively sense the first in S1=1 and S2=1 in FIG. 4) The light beam 24a and the second light beam 25a) are thus subjected to the step (C2), and the controller 28 causes the signal display 29 to display the second signal b2 (two red light signals d), and the operator judges that the thickness of the object to be tested a2 is smaller than The preset thickness range is n~m, so the object to be tested a2 does not pass the detection.

The following describes the detection of the object to be tested a3 which is the same as the object to be tested a1. Referring to FIG. 7, FIG. 7 is a third schematic view showing the object to be tested in the thickness detecting method according to a first preferred embodiment of the present invention.

It should be noted that since the object to be tested a3 and the object to be tested a1 are the same type of object to be tested and have the same preset thickness range n~m, the step (A1) is not necessary.

First, step (A) is performed, and the object to be tested a3 in Fig. 7 is placed on the horizontal base 23.

Then, the step (B) is performed, and the controller 28 determines whether the first light sensing device 26 senses the first light beam 24a emitted by the first light emitting device 24 and determines whether the second light sensing device 27 senses the first light beam. The second light beam 25a emitted by the two light emitting devices 25.

Since the object to be tested a3 blocks the first light beam 24a and the second light beam 25a, that is, neither the first light sensing device 26 nor the second light sensing device 27 senses the first light beam emitted by the first light emitting device 24. The second light beam 25a emitted by the second light emitting device 25 and the second light emitting device 25 (the first light sensing device 26 and the second light sensing device 27 are not sensed by S1=0 and S2=0 in FIG. 4). a light beam 24a and a second light beam 25a), so that step (C3) is subsequently performed, and the controller 28 causes the signal display 29 to display the third signal b3 (two green light signals c), and the operator judges that the thickness of the object to be tested a3 is greater than The preset thickness range is n~m, so the object to be tested a3 does not pass the detection.

Finally, a flow chart of a thickness detecting method according to a second preferred embodiment of the present invention will be described. Referring to FIG. 2 and FIG. 8, FIG. 8 is a flow chart showing a thickness detecting method according to a second preferred embodiment of the present invention.

First, the step (A1') is performed, and the lengths of the first pillar 21 and the second pillar 22 are adjusted according to the preset thickness range n~m, and the first light sensing device 26, the second light sensing device 27, and the first light are adjusted. The position of the transmitting device 24 and the second light emitting device 25.

In detail, the first light emitting device 24 will be moved along the first pillar 21 to be issued thereto. The distance between the first beam 24a and the horizontal pedestal 23 is equal to the lower limit n of the predetermined thickness range n~m, and the second light emitting device 25 is moved along the first pillar 21 to the second emitted by it. The distance between the light beam 25a and the horizontal pedestal 23 is equal to the upper limit value m of the predetermined thickness range n~m.

Additionally, the first light sensing device 26 will be moved along the second post 22 to a position where the first light beam 24a can be sensed, and the second light sensing device 27 will be moved along the second leg 22 to be sensible The position of the second light beam 25a.

Different from the first preferred embodiment, if the second light emitting device 25 can no longer move along the first pillar 21, the distance between the second light beam 25a emitted by the second light emitting device 25 and the horizontal base 23 is still not equal to the preset thickness. When the limit n is above the range n~m, the length of the first strut 21 can be adjusted so that the second light emitting device 25 can continue to move upward.

The length of the second post 22 will also be adjusted at the same time to allow the second light sensing device 27 to move up the second post 22 to a position where the second beam 25a can be sensed.

It should be noted that if the distance between the first beam 24a and the second beam 25a is equal to the preset thickness range n~m, only the first beam needs to be changed by adjusting the lengths of the first pillar 21 and the second pillar 22 The distance between the second light beam 25a and the horizontal base 23 is 24a, and the positions of the first light emitting device 24 and the second light emitting device 25 need not be adjusted.

The subsequent steps (A') to (C3') are the same as steps (A) to (C3) of the first preferred embodiment, and thus will not be described again.

According to the description of the above preferred embodiments, the thickness detecting method of the present invention is based on the first light beam 24a emitted by the first light emitting device 24 and the second light emitting device 25. Whether the second light beam 25a is blocked or not, the corresponding first signal or the second signal or the third signal is displayed on the signal display 29, so that the operator can immediately determine whether the thickness of the object to be tested is within a preset thickness range.

The invention provides a non-contact thickness detecting method, which can be applied to various materials of the object to be tested and does not need to perform any calculation, so that the operator can immediately judge and not be misjudged due to factors such as calculation errors.

Furthermore, the thickness detecting method of the present invention can adjust the first light beam 24a by changing the position of the first light emitting device 24 and the second light emitting device 25 or changing the length of the first pillar 21 before detecting the thickness of the object to be tested. The distance from the second light beam 25a and the horizontal base 23 is adapted to different preset thickness ranges, and can be applied to various different objects to be tested.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, other equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the present invention. Within the scope of the patent application.

1‧‧‧ vernier ruler

11‧‧‧Ontology

111‧‧‧ first foot

111a‧‧‧ main scale

112‧‧‧Second foot

112a‧‧‧Subscale

12‧‧‧Measurement Department

121‧‧‧First claw

121a‧‧‧first quantity

122‧‧‧second claw

122a‧‧‧second end

123‧‧‧ fixed seat

13‧‧‧Test object

21‧‧‧ first pillar

22‧‧‧Second pillar

23‧‧‧Horizontal base

24‧‧‧First light emitting device

24a‧‧‧First beam

25‧‧‧Second light emitting device

25a‧‧‧second beam

26‧‧‧First light sensing device

27‧‧‧Second light sensing device

28‧‧‧ Controller

29‧‧‧Signal Display

N~m‧‧‧preset thickness range

N‧‧‧lower limit

M‧‧‧ upper limit

(A1) ‧ ‧ steps

(A) ‧ ‧ steps

(B) ‧ ‧ steps

(C), (C2), (C3) ‧ ‧ steps

A1‧‧‧Test object

A2‧‧‧Test object

A3‧‧‧Test object

B1‧‧‧ first signal

B2‧‧‧second signal

B3‧‧‧third signal

c‧‧‧Green light signal

d‧‧‧Red light signal

(A1’) ‧ ‧ steps

(A’) ‧ ‧ steps

(B’) ‧ ‧ steps

(C’), (C2’), (C3’) ‧ ‧ steps

Figure 1 is a schematic diagram showing a conventional vernier scale.

2 is a horizontal pedestal, a first light emitting device, a second light emitting device, a first light sensing device, a second light sensing device, and a first light emitting device in a thickness detecting method according to a first preferred embodiment of the present invention. A schematic view of a pillar and a second pillar.

Figure 3 is a block diagram showing a controller of a first preferred embodiment of the present invention.

4 is a flow chart showing a thickness detecting method according to a first preferred embodiment of the present invention.

Fig. 5 is a first schematic view showing an object to be tested in a thickness detecting method according to a first preferred embodiment of the present invention.

Fig. 6 is a second schematic view showing the object to be tested in the thickness detecting method of a first preferred embodiment of the present invention.

Fig. 7 is a third schematic view showing the object to be tested in the thickness detecting method of a first preferred embodiment of the present invention.

Figure 8 is a flow chart showing a thickness detecting method according to a second preferred embodiment of the present invention.

23‧‧‧Horizontal base

24‧‧‧First light emitting device

24a‧‧‧First beam

25‧‧‧Second light emitting device

25a‧‧‧second beam

26‧‧‧First light sensing device

27‧‧‧Second light sensing device

N~m‧‧‧preset thickness range

(A1) ‧ ‧ steps

(A) ‧ ‧ steps

(B) ‧ ‧ steps

(C), (C2), (C3) ‧ ‧ steps

B1‧‧‧ first signal

B2‧‧‧second signal

B3‧‧‧third signal

Claims (15)

A thickness detecting method, the method comprising the steps of: (A) placing a test object on a horizontal pedestal; and (B) determining whether a first light sensing device senses a first light emitting device a first light beam and determining whether a second light sensing device senses a second light beam emitted by a second light emitting device, wherein the second light emitting device and the second light sensing device are positioned higher than a position of the first light emitting device and the first light sensing device, the first light emitting device and the first light sensing device face each other, the second light emitting device and the second light sensing device are mutually Facing; and (C) if the first light sensing device does not sense the first light beam emitted by the first light emitting device and the second light sensing device senses the second light emitting device The second light beam is emitted, and a first signal is displayed and a thickness of one of the objects to be tested is determined to be within a predetermined thickness range. The thickness detecting method of claim 1, wherein after the step (B), the method further comprises: (C2) if the first light sensing device and the second light sensing device respectively sense The first light beam emitted by the first light emitting device and the second light beam emitted by the second light emitting device display a second signal and determine that the thickness of the object to be tested is less than the predetermined thickness range. The thickness detecting method according to claim 2, wherein the step (B) further comprises a step: (C3) if the first light sensing device and the second light sensing device neither sense the first light beam emitted by the first light emitting device and the second light emitted by the second light emitting device The light beam displays a third signal and determines that the thickness of the object to be tested is greater than the predetermined thickness range. The thickness detecting method according to claim 3, wherein in the step (C), the step (C2), and the step (C3), the controller is based on the first light sensing device and the first Whether the first light beam and the second light beam are respectively sensed by the two light sensing devices, so that a signal display displays the first signal, the second signal, and the third signal. The thickness detecting method according to claim 1, wherein the first signal in the step (C) comprises a green light signal and a red light signal. The thickness detecting method of claim 2, wherein the second signal in the step (C2) comprises two red light signals. The thickness detecting method according to claim 3, wherein the third signal in the step (C3) comprises a green light signal. The thickness detecting method of claim 1, wherein the step (A) further comprises a step of: (A1) adjusting the first light sensing device according to the preset thickness range, the second light sensation Positioning the first light emitting device and the second light emitting device such that the distance between the first light beam and the horizontal base is equal to a lower limit value of the predetermined thickness range, and the second light beam is The distance of the horizontal pedestal is equal to one of the preset thickness ranges. The method for detecting thickness according to item 8 of the patent application, wherein the step (A1) The first light emitting device and the second light emitting device are disposed on a first pillar, and the first light sensing device and the second light sensing device are disposed on a second pillar, wherein the first A pillar is parallel to the second pillar. The thickness detecting method of claim 9, wherein the step (A1) further comprises: adjusting a length of the first pillar and the second pillar according to the predetermined thickness range. The thickness detecting method according to claim 1, wherein the first light emitting device and the second light emitting device in the step (B) emit a laser beam. The thickness detecting method according to claim 1, wherein the first light sensing device and the second light sensing device in the step (B) are a photodiode or a photoresistor. A thickness detecting method, the method comprising the steps of: (A) placing a test object on a horizontal pedestal; and (B) determining whether a first light sensing device senses a first light emitting device a first light beam and determining whether a second light sensing device senses a second light beam emitted by a second light emitting device, wherein the second light emitting device and the second light sensing device are positioned higher than a position of the first light emitting device and the first light sensing device; and (C) if the first light sensing device does not sense the first light beam emitted by the first light emitting device and the second The light sensing device senses the second light beam emitted by the second light emitting device, and displays a first signal and determines that one of the objects to be tested has a thickness within a predetermined thickness range; wherein the step (A) ) Also includes a step before: (A1) adjusting the positions of the first light sensing device, the second light sensing device, the first light emitting device, and the second light emitting device according to the preset thickness range, so that the first light beam and the level The distance of the pedestal is equal to one of the preset thickness ranges, and the distance between the second beam and the horizontal pedestal is equal to one of the preset thickness ranges. The thickness detecting method of claim 13, wherein the first light emitting device and the second light emitting device in the step (A1) are disposed on a first pillar, the first light sensing device And the second light sensing device is disposed on a second pillar, wherein the first pillar is parallel to the second pillar. The thickness detecting method of claim 14, wherein the step (A1) further comprises: adjusting the length of the first pillar and the second pillar according to the predetermined thickness range.