Bidirectional laser diameter measuring instrument

Abstract

The invention discloses a bidirectional laser diameter measuring instrument, which relates to the technical field of laser diameter measurement and comprises a machine body, and the machine body is provided with a controller, a scanning mirror assembly, a laser transmitter, a first optical signal receiving assembly, a second optical signal receiving assembly, a first F theta mirror, an additional reflector assembly and a second F theta mirror. The scanning mirror assembly reflects the incident laser to form a target scanning range and an additional scanning range; the first F theta mirror corrects the laser in the target scanning range so as to irradiate the detection area in the first direction; the additional reflector assembly reflects the laser reflected to the additional scanning range, and the laser is corrected by a second F theta mirror so as to irradiate the detection area in a second direction; according to the laser diameter measuring device, the laser transmitter, the scanning mirror assembly, the first optical signal receiving assembly and the second optical signal receiving assembly are only needed, two-way diameter laser detection can be carried out on a detected target, and under the condition that two-way laser diameter measuring is achieved, the manufacturing cost is lower.

Description

Technical Field

[0001] The invention relates to the technical field of laser diameter measurement, and in particular to a bidirectional laser diameter measuring instrument. Background Art

[0002] The current bidirectional laser diameter gauge can only measure the diameter and width in one direction. If you want to detect the diameter and width in two directions, especially to detect the width and thickness of a flat wire, you need to configure the laser detector with two sets of laser emitting and receiving devices. As proposed in the Chinese utility model "Bidirectional integrated bidirectional laser diameter gauge" with announcement number CN204479031U, it includes a housing, in which a laser component, a scanning mirror assembly, an Fθ mirror assembly, a condenser assembly and an optical signal receiving assembly are arranged. A large reflector assembly is also arranged in the housing. Two laser components, scanning mirror assemblies, Fθ mirror assemblies, condenser assemblies, optical signal receiving assemblies and large reflector components are arranged to form two groups of visible laser detection optical paths; the large reflector portion includes a first large reflector component and a second large reflector component, and the laser component emits visible Laser, the visible laser is reflected onto the mirror surface of the first large reflector component after passing through the scanning mirror assembly, the visible laser is reflected by the first large reflector component and passes through the Fθ mirror assembly to form a parallel visible laser, the visible laser passes through the workpiece to be measured and passes through the condenser lens assembly and is incident on the mirror surface of the second large reflector component, the visible laser is reflected by the second large reflector component and is received by the optical signal receiving assembly; and the visible laser detection optical path between the Fθ mirror assembly and the condenser lens assembly in the first group of visible laser detection optical paths and the visible laser detection optical path between the Fθ mirror assembly and the condenser lens assembly in the second group of visible laser detection optical paths are perpendicular to each other.

[0003] That is, in order to achieve diameter measurement in two directions, two laser components, two scanning mirror assemblies and two optical signal receiving components need to be configured on the electronic device, resulting in high overall preparation costs. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bidirectional laser diameter measuring instrument, comprising a body, on which a controller, a scanning mirror assembly, a laser emitter corresponding to the scanning mirror assembly, and a detection area suitable for detecting the passage of a target are arranged; the scanning mirror assembly reflects the laser emitted by the laser emitter to form a target scanning range and an additional scanning range outside the target scanning range; a first Fθ mirror is installed on the body, and the first Fθ mirror is configured to correct the laser reflected by the scanning mirror assembly to the target scanning range to form irradiation of the detection area in a first direction; a scanning mirror is arranged on the body along the first direction and in contact with the first Fθ mirror Corresponding to the first optical signal receiving component, the detection area is located between the first Fθ mirror and the incident port of the first optical signal receiving component; wherein, an additional reflector component and a second Fθ mirror are also provided on the body, the additional reflector component is configured to reflect the laser reflected by the scanning mirror component to the additional scanning range, and the second Fθ mirror corrects the laser reflected by the additional reflector component to form an irradiation of the detection area in a second direction different from the first direction; the body is also provided with a second optical signal receiving component corresponding to the second Fθ mirror along the second direction, and the detection area is located between the second Fθ mirror and the incident port of the second optical signal receiving component.

[0006] As a further solution of the present invention: the first direction and the second direction are arranged perpendicular to each other.

[0007] As a further solution of the present invention: the scanning mirror assembly includes a driving motor and a laser reflecting mirror driven by the driving motor.

[0008] As a further solution of the present invention: the driving motor is configured to reciprocate and change direction to drive the laser reflecting mirror to reflect the laser emitted by the laser transmitter.

[0009] As a further solution of the present invention: the target scanning range and the additional scanning range are formed by scanning reflection of the laser by the same reflection surface of the laser reflection mirror.

[0010] As a further solution of the present invention: the controller is configured to have a first control for controlling the scanning mirror assembly so that the scanning range after the laser is reflected remains within the target scanning range, and a second control for controlling the scanning mirror assembly so that the scanning range after the laser is reflected includes both the target scanning range and the additional scanning range.

[0011] As a further solution of the present invention: when executing the first control, the second optical signal receiving component is controlled to be disabled.

[0012] As a further solution of the present invention: when the second control is executed, the second optical signal receiving component is correspondingly enabled.

[0013] As a further solution of the present invention: the controller is also configured to execute a second control in response to a specific instruction and run an automatic detection mode: when it is detected that the diameter difference between the target diameter in the first direction and the target diameter in the second direction is continuously lower than a preset difference threshold for more than a preset time, the first control is executed.

[0014] As a further solution of the present invention: a command input unit electrically connected to the controller is also provided on the machine body, and the command input unit is configured to input a first control command corresponding to the first control pair, input a second control command corresponding to the second control, and input a specific command corresponding to the specific command.

[0015] Compared with the prior art, the beneficial effects of the present technical solution are as follows: by making the scanning mirror assembly reflect and scan the laser emitted by the laser transmitter, an additional scanning range is formed outside the target scanning range corresponding to the first Fθ mirror, and the laser reflected in the additional scanning range is reflected to the second Fθ mirror through the additional reflector assembly, so as to form a second light emitting direction different from the first light emitting direction of the first Fθ mirror after correction by the second Fθ mirror; that is, by increasing the scanning range of the scanning mirror assembly and configuring a corresponding additional reflector assembly for it, the laser in the additional scanning range can be reflected to the second Fθ mirror along a specified route, so as to form irradiation of the detection target in two different directions, so as to be received by the corresponding first optical signal receiving assembly and the second optical signal receiving assembly, and the corresponding diameter is obtained by conversion and calculation.

[0016] In electronic devices, only one laser transmitter, one scanning mirror assembly, and a first optical signal receiving assembly and a second optical signal receiving assembly for receiving light irradiated in different directions are needed to realize laser detection of the diameter of the detection target in two directions. In the case of two-way laser diameter measurement, the preparation cost is lower.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a circuit framework diagram of the present invention; Figure 2is a schematic diagram of laser detection in the present invention; Figure 3 is another schematic diagram of performing laser detection in the present invention; Figure 4 is another schematic diagram of laser detection in the present invention, which is Figure 3 The additional reflector assemblies used have different numbers of reflectors.

[0020] The corresponding reference numerals in the accompanying drawings are described as follows: Controller-1, scanning mirror assembly-2, laser transmitter-3, first Fθ mirror-4, first optical signal receiving assembly-5, additional reflector assembly-6, second Fθ mirror-7, detection area-8, instruction input unit-9, second optical signal receiving assembly-10, detection target-11, display unit-12, Laser reflector-201, target scanning range-202, additional scanning range-203, driving motor-204, Reflectors - 601, 601a, 602, 603, Single lens-501, Single lens-1001. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-4 A bidirectional laser diameter measuring instrument includes a body, on which are disposed a controller 1, a scanning mirror assembly 2, a laser transmitter 3, a first Fθ mirror 4, a first optical signal receiving assembly 5, an additional reflector assembly 6, a second Fθ mirror 7, a second optical signal receiving assembly 10, and a detection area 8 suitable for detecting a target 11 passing through. The detection target 11 may be an enameled wire or other linear, strip-shaped or long-strip objects.

[0023] The laser emitter 3 corresponds to the scanning mirror assembly 2 , and the laser emitter 3 irradiates toward the laser reflection mirror 201 of the scanning mirror assembly 2 .

[0024] The scanning mirror assembly 2 reflects the laser light emitted by the laser emitter 3 to form a target scanning range 202 and an additional scanning range 203 outside the target scanning range 202 .

[0025] The first Fθ mirror 4 is configured to correct the laser light reflected by the scanning mirror assembly 2 to the target scanning range 202 so as to irradiate the detection area 8 in a first direction.

[0026] The first optical signal receiving component 5 corresponds to the first Fθ mirror 4 along the first direction, and the detection area 8 is located between the first Fθ mirror 4 and the incident port of the first optical signal receiving component 5. The receiving component of the first optical signal receiving component 5 is, for example, a photodiode. When measuring the diameter, the laser emitted by the laser transmitter 3 is reflected by the scanning mirror component 2 and corrected by the first Fθ mirror 4 to form a light band, and then the shadow width is formed on the light band by the detection target 11. The projection width can be received by the photodiode of the first optical signal receiving component 5 and converted into a digital signal, and the controller 1 calculates and measures the corresponding diameter size in the first direction (or the width in the first direction).

[0027] The additional reflective mirror assembly 6 is configured to reflect the laser reflected by the scanning mirror assembly 2 to the additional scanning range 203, and the second Fθ mirror 7 corrects the laser reflected by the additional reflective mirror assembly 6 to form an irradiation of the detection area 8 in a second direction different from the first direction.

[0028] The second optical signal receiving component 10 corresponds to the second Fθ mirror 7 along the second direction, and the detection area 8 is located between the second Fθ mirror 7 and the incident port of the second optical signal receiving component 10. The receiving component of the second optical signal receiving component 10 is, for example, a photodiode. When measuring the diameter, the laser emitted by the laser transmitter 3 is reflected by the scanning mirror component 2 and corrected by the second Fθ mirror 7 to form a light band, and then the shadow width is formed on the light band by the detection target. The projection width can be received by the photodiode of the second optical signal receiving component 10 and converted into a digital signal, and the corresponding diameter size in the second direction (or the width in the second direction) is calculated and measured by the controller 1.

[0029] By making the scanning mirror assembly 2 reflect and scan the laser emitted by the laser emitter 3, an additional scanning range 203 is formed in addition to the target scanning range 202 corresponding to the first Fθ mirror 4, and the laser reflected in the additional scanning range 203 is reflected to the second Fθ mirror 4 by the additional reflector assembly 6, so that the second Fθ mirror 4 forms a second light emitting direction different from the first light emitting direction of the first Fθ mirror 4 after correction. That is, by increasing the scanning range of the scanning mirror assembly 2 and configuring the corresponding additional reflector assembly 6 for it, the laser in the additional scanning range 203 can be reflected to the second Fθ mirror 7 according to the specified route, so as to form the irradiation of the detection target 11 in two different directions, so that it is received by the corresponding first optical signal receiving assembly 5 and the second optical signal receiving assembly 10, and then converted and calculated to obtain the corresponding diameter.

[0030] In electronic devices, only one laser transmitter, one scanning mirror assembly, and a first optical signal receiving assembly and a second optical signal receiving assembly for receiving lasers irradiated in different directions are needed to realize laser detection of the diameter (width) of the detection target in two directions. In the case of two-way laser diameter measurement, the preparation cost is lower.

[0031] In some embodiments, the Fθ mirror is also called a laser scanning focusing mirror, a flat field focusing mirror or a flat field lens.

[0032] In this embodiment, the first direction and the second direction are arranged perpendicular to each other.

[0033] like Figure 2-4 As shown, the detection target 11 passes through the detection area horizontally or substantially horizontally, and the body has a support frame for supporting the detection target or supports the detection target through an external support frame, so that it can pass through the detection area relatively stably. The first direction is from top to bottom, and the second direction is from left to right or from right to left.

[0034] In this embodiment, the scanning mirror assembly 2 includes a driving motor 204 and a laser reflecting mirror 201 driven by the driving motor 204 .

[0035] In some embodiments, the driving motor 204 rotates back and forth to drive the laser reflector 201 to reflect the laser emitted by the laser emitter 3 .

[0036] The target scanning range 202 and the additional scanning range 203 are formed by scanning reflection of the laser light by the same reflection surface of the laser reflection mirror 201 .

[0037] like Figure 2 , 3 As shown, in some implementations, the additional reflector assembly 6 may only use one reflector 601 a to reflect the laser light in the additional scanning range 203 to obtain the incident laser light corresponding to the second Fθ mirror 7 .

[0038] like Figure 3 As shown, after the laser emitter 3 located above emits laser to the right, the laser reflector 201 located on the right side of the laser emitter 3 (the upper part of the laser reflector 201 is tilted to the left after being erected, and the reflective surface of the laser reflector 201 is located on the left) reflects the laser downward, and the laser reflector 201 is driven by the driving motor 204 to form a target scanning range 202 and an additional scanning range 203 located below the laser reflector 201.

[0039] The detection area 8 is located below the target scanning range 202, and the first Fθ mirror 4 is located in the target scanning range 202 and is set horizontally. The laser reflected downward to the target scanning range 202 is corrected by the first Fθ mirror 4 to form a downward light band, that is, the detection area 8 where the detection target is placed is irradiated downward.

[0040] The incident port of the first optical signal receiving component 5 is arranged upward and is located below the detection area 8 .

[0041] The additional scanning range 203 is located to the left of the target scanning range 202. More specifically, the additional scanning range 203 is located at the lower left of the target scanning range 202 and to the left of the detection area 8.

[0042] The reflector 601a of the additional reflector assembly is located in the additional scanning range (the upper part of the reflector 601a after being erected is tilted to the left, and the reflective surface of the reflector 601a is located on the right), and the laser reflected to the lower left to the additional scanning range is reflected to the right by the reflector 601a.

[0043] The second Fθ mirror 7 is located between the reflector 601a and the detection area 8, and the second Fθ mirror 7 is set vertically. The second Fθ mirror 7 corrects the laser reflected to the right by the reflector 601a to form a rightward light band, that is, to illuminate the detection area 8 where the detection target is placed. The incident port of the second optical signal receiving component 10 is set to the left and is located to the right of the detection area 8.

[0044] like Figure 4 As shown, in some implementations, the reflector assembly may use a plurality of reflectors ( 601 , 602 , 603 ) to continuously reflect the laser light in the additional scanning range 203 to obtain the incident laser light corresponding to the second Fθ mirror 7 .

[0045] In this embodiment, the controller 1 is configured to have a first control for controlling the scanning mirror assembly 2 so that the scanning range after the laser reflection remains within the target scanning range 202, and a second control for controlling the scanning mirror assembly 2 so that the scanning range after the laser reflection includes both the target scanning range 202 and the additional scanning range 203.

[0046] Preferably, when the first control is performed, the control deactivates the second optical signal receiving component 10 .

[0047] Preferably, when the second control is executed, the second optical signal receiving component 10 is enabled accordingly.

[0048] In some embodiments, the controller 1 is also configured to execute a second control in response to a specific instruction and run an automatic detection mode: when it is detected that the diameter difference between the target diameter in the first direction and the target diameter in the second direction is continuously lower than a preset difference threshold for more than a preset time, the first control is executed.

[0049] That is, when it is detected that the diameter difference (R1-R2 or R2-R1) between the target diameter R1 in the first direction and the target diameter R2 in the second direction is continuously lower than the preset difference threshold R for more than the preset time T, the first control is performed. The preset difference threshold R is, for example, 0.02 mm, 0.03 mm, 0.04 mm, etc. The preset time T is, for example, 30 s, 1 min, 2 min, etc.

[0050] In some embodiments, a command input unit 9 electrically connected to the controller 1 is also provided on the machine body.

[0051] The command input unit 9 is configured to be able to input a first control command corresponding to the first control, to input a second control command corresponding to the second control, and to input a specific command corresponding to the specific command.

[0052] The command input unit 9 is, for example, an operation key assembly or an operation screen, through which any of the above commands is inputted, such as by pressing a corresponding key to input the corresponding command, or by clicking a corresponding key position on the operation screen or performing a corresponding interaction to input the corresponding command.

[0053] When the first control instruction is input, the controller 1 executes the first control, by reducing the amplitude of the reciprocating direction-changing rotation of the driving motor 204, that is, controlling the driving motor 204 to reciprocate and change direction within a small angle range, so that the scanning range of the laser reflecting mirror 201 of the scanning mirror assembly after the laser is reflected is maintained within the target scanning range 202. When the rotation speed of the driving motor 204 remains unchanged, the laser emitted by the laser emitter 3 has a longer residence time in the target scanning range 202.

[0054] When the operation inputs the second control instruction, the controller 1 executes the second control by increasing the amplitude of the reciprocating directional rotation of the drive motor 204, that is, controlling the drive motor 204 to reciprocate and change direction within a larger angle range, so that the laser reflector 201 of the scanning mirror assembly has a scanning range after laser reflection that includes both the target scanning range 202 and the additional scanning range 203, so that both the first Fθ mirror 4 and the second Fθ mirror 7 can be irradiated with laser, and the corresponding optical signal receiving components can realize diameter measurement in different directions.

[0055] By controlling and changing the amplitude of the reciprocating direction-changing rotation of the driving motor, the switching from the first control to the second control or the switching from the second control to the first control can be completed, and the control is more convenient.

[0056] When a specific instruction is input, the controller 1 first executes the second control to achieve diameter measurement in different directions; when the diameter difference between the target diameter in the first direction and the target diameter in the second direction is detected to be continuously lower than the preset difference threshold for more than a preset time, the first control is executed. It can be used for automatic detection and automatic identification of the detection target as a circular wire body or a flat wire body: when it is identified as a flat wire body, the second control is continued to be maintained to perform multi-directional diameter measurement that is more in line with flat wire body detection; when it is identified as a circular wire body, the first control that is more conducive to energy saving is performed.

[0057] like Figure 2 , 3 As shown, the first optical signal receiving component 5 has a corresponding single lens 501, a semi-planar lens or a condenser lens, and the incident port of the first optical signal receiving component 5 is the incident position of the corresponding mirror (single lens 501).

[0058] like Figure 2 , 3 As shown, the second optical signal receiving component 10 has a corresponding single lens 1001, a semi-planar lens or a condenser lens, and the incident port of the second optical signal receiving component 10 is the incident position of the corresponding lens (single lens 1001).

[0059] In some embodiments, the body is also provided with a display unit 12, such as a display screen, which is electrically connected to the controller 1 and is used to display the detection results. In some embodiments, the display screen can also be used to display other information, such as displaying the operation information of the above-mentioned instruction input unit.

[0060] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A bidirectional laser diameter measuring instrument, characterized in that: The machine body comprises a controller, a scanning mirror assembly, a laser emitter corresponding to the scanning mirror assembly, and a detection area suitable for detecting the passage of a target; The scanning mirror assembly reflects the laser emitted by the laser transmitter to form a target scanning range and an additional scanning range outside the target scanning range; A first Fθ mirror is installed on the machine body, and the first Fθ mirror is configured to correct the laser reflected by the scanning mirror assembly to the target scanning range to form a first direction of irradiation of the detection area; A first optical signal receiving component is disposed on the body along a first direction and corresponds to the first Fθ mirror, and the detection area is located between the first Fθ mirror and the incident port of the first optical signal receiving component; The machine body is also provided with an additional reflector assembly and a second Fθ mirror, wherein the additional reflector assembly is configured to reflect the laser reflected by the scanning mirror assembly to the additional scanning range, and the second Fθ mirror is configured to correct the laser reflected by the additional reflector assembly to form an irradiation of the detection area in a second direction different from the first direction; The machine body is also provided with a second optical signal receiving component corresponding to the second Fθ mirror along the second direction, and the detection area is located between the second Fθ mirror and the incident port of the second optical signal receiving component.

2. The bidirectional laser diameter measuring instrument according to claim 1, characterized in that: The first direction and the second direction are arranged perpendicular to each other.

3. The bidirectional laser diameter measuring instrument according to claim 1, characterized in that: The scanning mirror assembly includes a driving motor and a laser reflecting mirror driven by the driving motor.

4. The bidirectional laser diameter measuring instrument according to claim 3, characterized in that: The driving motor rotates back and forth to drive the laser reflector to reflect the laser emitted by the laser transmitter.

5. The bidirectional laser diameter measuring instrument according to claim 4, characterized in that: The target scanning range and the additional scanning range are formed by scanning reflection of the laser by the same reflection surface of the laser reflection mirror.

6. The bidirectional laser diameter measuring instrument according to any one of claims 1 to 5, characterized in that: The controller is configured to have a first control function for controlling the scanning mirror assembly so that the scanning range after the laser is reflected is maintained within the target scanning range. And a second control is provided to control the scanning mirror assembly so that the scanning range after the laser is reflected includes both the target scanning range and the additional scanning range.

7. The bidirectional laser diameter measuring instrument according to claim 6, characterized in that: When the first control is performed, the control deactivates the second optical signal receiving component.

8. The bidirectional laser diameter measuring instrument according to claim 7, characterized in that: When the second control is executed, the second optical signal receiving component is enabled accordingly.

9. The bidirectional laser diameter measuring instrument according to claim 6, characterized in that: The controller is also configured to perform a second control in response to a specific instruction and run an automatic detection mode: When it is detected that the diameter difference between the target diameter in the first direction and the target diameter in the second direction is continuously lower than the preset difference threshold value for more than a preset time, the first control is executed.

10. The bidirectional laser diameter measuring instrument according to claim 9, characterized in that: The machine body is also provided with a command input unit electrically connected to the controller. The command input unit is configured to input a first control command corresponding to the first control pair, input a second control command corresponding to the second control, and input a specific command corresponding to the specific command.

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