CN104764399A - Measuring instrument capable of quickly focusing and measuring method thereof - Google Patents
Measuring instrument capable of quickly focusing and measuring method thereof Download PDFInfo
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- CN104764399A CN104764399A CN201410846360.3A CN201410846360A CN104764399A CN 104764399 A CN104764399 A CN 104764399A CN 201410846360 A CN201410846360 A CN 201410846360A CN 104764399 A CN104764399 A CN 104764399A
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- camera lens
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Abstract
The invention discloses a measuring instrument capable of quickly focusing and a measuring method thereof. The measuring instrument comprises a frame, a detection platform arranged on the frame, a moving arm arranged above the detection platform, and a CCD lens used for detecting work-pieces. A flight time sensor used for assisting the CCD lens in focusing is arranged on the moving arm, and the flight time sensor directly faces the detection platform. Thus, the flight time sensor is arranged on the measuring instrument to replace ultrasonic to carry out measurement, and a series of problems for ultrasonic measurement, for example, the precision is not high, the diffusion angle is large, and measurement of surrounding machines of the same kind is affected, are avoided. According to the measuring instrument, the flight time sensor is used to judge the moving distance of the moving arm so as to realize quick focusing. The measuring instrument has a simple and firm structure, is not subject to interference from other signals during measurement, works stably, is accurate in measurement data, and improves the quality of work-piece detection.
Description
Technical field
The present invention relates to radiographic measurement art, refer in particular to a kind of can the measuring instrument of rapid focus and measuring method thereof.
Background technology
Image measurer has another name called accurate image-type surveying instrument, which overcomes the deficiency of conventional projector, be integrate light, mechanical, electrical, the novel high-precision of computer image technology, high-tech surveying instrument.The imaging of high magnification optical amplifier is carried out by optical microscope measuring targets, after the object image after amplification is sent into computing machine by CCD camera system, the profile of various complex part and the microcosmic detection of surface configuration size, angle and position, particularly precision parts and quality control can be detected efficiently.Traditional measurement instrument adopts ultrasound wave mode to assist CCD lens focusing usually, but ultrasound wave often can be subject to other electromagnetism or sound wave interference, and cause measuring out of true, and precision is not high, diffusion angle is large, the measurement of congeniality board around impact.Therefore, tackle existing measuring instrument and improve, to solve the problem.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its fundamental purpose be to provide a kind of can the measuring instrument of rapid focus and measuring method thereof, by arranging a time-of-flight sensor on measuring instrument, to replace ultrasound wave to measure, during measurement, time-of-flight sensor is utilized to judge the displacement of transfer arm, realize rapid focus, working stability, improve workpiece sensing quality.
For achieving the above object, the present invention adopts following technical scheme:
A kind of can the measuring instrument of rapid focus, including frame, the detection platform be arranged in frame, being located at the transfer arm above detection platform and the CCD camera lens for detecting workpiece, wherein, described transfer arm is provided with one for the time-of-flight sensor of auxiliary CCD lens focusing, this time-of-flight sensor camera lens is right against above-mentioned detection platform.
As a kind of preferred version: described time-of-flight sensor includes for the transmitting camera lens to detection platform emission of light and for receiving by the reception camera lens of detection platform reflection ray.
As a kind of preferred version: described time-of-flight sensor is provided with one and light is received by being transmitted into the modular converter that the time used is converted to distance.
As a kind of preferred version: described transmitting camera lens and reception camera lens are in same level.
As a kind of preferred version: described CCD camera lens is installed on transfer arm lower end.
Can the measuring method of measuring instrument of rapid focus described in claim 1, comprise step:
S1, setting CCD camera lens and between detection platform or workpiece for measurement, focusing is from being F, the spacing of time-of-flight sensor and CCD camera lens is L1;
S2, initial position confirm: detect its distance L to detection platform or workpiece for measurement as initial position by time-of-flight sensor after start, and transfer arm shift motion H1 when calculating focusing, i.e. H1=L-L1-F, adds a modified value △ L=± 2.5mm simultaneously and forms shift motion theoretical H on H1 basis;
S3, start measure: transfer arm moves down towards detection platform or workpiece for measurement direction, it is constantly detected to detection platform or the distance L2 surveying workpiece by time-of-flight sensor, and constantly calculate the real-time stroke H2=L-L2 of transfer arm, when real-time stroke H2 is with under the equal situation of shift motion theoretical H that initial position confirms, transfer arm stops mobile, and namely CCD camera lens is in focusing position.
The present invention compared with prior art has obvious advantage and beneficial effect, specifically, as shown from the above technical solution, by arranging a time-of-flight sensor on measuring instrument, measure to replace ultrasound wave, when avoiding employing ultrasonic measurement, precision is not high, diffusion angle is large, the series of problems of impact congeniality board measurement around, this measuring instrument utilizes time-of-flight sensor to judge the displacement of transfer arm, realize rapid focus, its structure is simple, firmly, during measurement, other signal disturbing can not be subject to, working stability, measurement data is accurate, improve workpiece sensing quality.
For more clearly setting forth architectural feature of the present invention and effect, be described in detail below in conjunction with accompanying drawing and specific embodiment.
Accompanying drawing explanation
Fig. 1 is the initial position view of the present invention;
Fig. 2 be the present invention start to measure time view.
accompanying drawing identifier declaration:
10, frame 20, detection platform
30, transfer arm 40, CCD camera lens
50, time-of-flight sensor 51, transmitting camera lens
52, camera lens 53, modular converter is received.
Embodiment
The present invention as depicted in figs. 1 and 2, a kind of can the measuring instrument of rapid focus and measuring method thereof, include frame 10, detection platform 20, transfer arm 30, CCD camera lens 40 and time-of-flight sensor 50, wherein:
This detection platform 20 is arranged in frame 10, and it is for carrying workpiece for measurement.
What this transfer arm 30 can move freely is installed in frame 10, and is positioned at above above-mentioned detection platform 20.
This CCD camera lens 40 is for detecting workpiece, and it is installed on above-mentioned transfer arm 30 lower end.
This time-of-flight sensor 50 is focused for auxiliary CCD camera lens 40, it is arranged on transfer arm 30, and be right against above-mentioned detection platform 20, this time-of-flight sensor 50 include for detection platform 20 emission of light transmitting camera lens 51, by the reception camera lens 52 of detection platform 20 reflection ray and one, light is received by being transmitted into the modular converter 53 that the time used is converted to distance for receiving, further, this transmitting camera lens 51 and reception camera lens 52 are in same level.
The measuring method of this measuring instrument, comprises the following steps:
S1, setting CCD camera lens and between detection platform or workpiece for measurement, focusing is from being F, the spacing of time-of-flight sensor and CCD camera lens is L1;
S2, initial position confirm: detect its distance L to detection platform 20 or workpiece for measurement as initial position by time-of-flight sensor 50 after start, and transfer arm 30 shift motion H1 when calculating focusing, i.e. H1=L-L1-F, adds a modified value △ L=± 2.5mm simultaneously and forms shift motion theoretical H on H1 basis;
S3, start measure: transfer arm 30 moves down towards detection platform 20 or workpiece for measurement direction, its distance L2 to detection platform 20 or workpiece for measurement is constantly detected by time-of-flight sensor 50, and constantly calculate transfer arm 30 stroke H2=L-L2 in real time, when real-time stroke H2 is with under the equal situation of shift motion theoretical H that initial position confirms, transfer arm 30 stops mobile, and namely CCD camera lens 40 is in focusing position.
The principle of the invention is as follows: as shown in Figure 1, time-of-flight sensor 50 detects its distance L to detection platform 20 or workpiece for measurement, this is the initial position of transfer arm 30, and focusing is definite value from F and time-of-flight sensor 50 with the spacing L1 of CCD camera lens 40, transfer arm 30 only needs shift motion H1=L-L1-F, can focus; As shown in Figure 2, when starting to measure, transfer arm 30 is in the process moved down, time-of-flight sensor 50 constantly detects its distance L2 to detection platform 20 or workpiece for measurement, L2 is the value of constantly change, as the actual shift motion H2=L-L2=H=H1+ △ L=± 2.5mm of transfer arm 30, namely realize focusing.
Design focal point of the present invention is, by arranging a time-of-flight sensor on measuring instrument, measure to replace ultrasound wave, when avoiding employing ultrasonic measurement, precision is not high, diffusion angle is large, the series of problems of impact congeniality board measurement around, this measuring instrument utilizes time-of-flight sensor to judge the displacement of transfer arm, realizes rapid focus, its structure is simple, firm, during measurement, other signal disturbing can not be subject to, working stability, measurement data is accurate, improves workpiece sensing quality.
The above, it is only preferred embodiment of the present invention, not technical scope of the present invention is imposed any restrictions, thus every according to technical spirit of the present invention to any trickle amendment made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (6)
1. one kind can the measuring instrument of rapid focus, including frame, the detection platform be arranged in frame, being located at the transfer arm above detection platform and the CCD camera lens for detecting workpiece, it is characterized in that: described transfer arm is provided with one for the time-of-flight sensor of auxiliary CCD lens focusing, this time-of-flight sensor camera lens is right against above-mentioned detection platform.
2. according to claim 1 can the measuring instrument of rapid focus, it is characterized in that: described time-of-flight sensor camera lens comprises useful in the transmitting camera lens to detection platform emission of light and for receiving by the reception camera lens of detection platform reflection ray.
3. according to claim 2 can the measuring instrument of rapid focus, it is characterized in that: described time-of-flight sensor is provided with one and light is received by being transmitted into the modular converter that the time used is converted to distance.
4. according to claim 2 can the measuring instrument of rapid focus, it is characterized in that: described transmitting camera lens and receive camera lens and be in same level.
5. according to claim 1 can the measuring instrument of rapid focus, it is characterized in that: described CCD camera lens is installed on transfer arm lower end.
6. can the measuring method of measuring instrument of rapid focus described in claim 1, it is characterized in that: comprise step:
S1, setting CCD camera lens and between detection platform or workpiece for measurement, focusing is from being F, the spacing of time-of-flight sensor and CCD camera lens is L1;
S2, initial position confirm: detect its distance L to detection platform or workpiece for measurement as initial position by time-of-flight sensor after start, and transfer arm shift motion H1 when calculating focusing, i.e. H1=L-L1-F, adds a modified value △ L=± 2.5mm simultaneously and forms shift motion theoretical H on H1 basis;
S3, start measure: transfer arm moves down towards detection platform or workpiece for measurement direction, it is constantly detected to detection platform or the distance L2 surveying workpiece by time-of-flight sensor, and constantly calculate the real-time stroke H2=L-L2 of transfer arm, when real-time stroke H2 is with under the equal situation of shift motion theoretical H that initial position confirms, transfer arm stops mobile, and namely CCD camera lens is in focusing position.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410846360.3A CN104764399A (en) | 2014-12-31 | 2014-12-31 | Measuring instrument capable of quickly focusing and measuring method thereof |
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| CN201410846360.3A CN104764399A (en) | 2014-12-31 | 2014-12-31 | Measuring instrument capable of quickly focusing and measuring method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063975A (en) * | 2017-03-27 | 2017-08-18 | 中国科学院广州生物医药与健康研究院 | Method, device and the equipment of cell image collection |
| CN108195292A (en) * | 2018-02-02 | 2018-06-22 | 吴飞斌 | A kind of displacement measurement method |
| CN111337516A (en) * | 2018-12-19 | 2020-06-26 | 英泰克普拉斯有限公司 | Glass cover plate inspection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063975A (en) * | 2017-03-27 | 2017-08-18 | 中国科学院广州生物医药与健康研究院 | Method, device and the equipment of cell image collection |
| CN108195292A (en) * | 2018-02-02 | 2018-06-22 | 吴飞斌 | A kind of displacement measurement method |
| CN111337516A (en) * | 2018-12-19 | 2020-06-26 | 英泰克普拉斯有限公司 | Glass cover plate inspection device |
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