An online measuring device for oil film thickness on object surface

Abstract

The present invention relates to an online measurement device for the thickness of oil film on the surface of an object, comprising an object placement platform, a gantry, a light shield, a light source system and a photoelectric detector, wherein the light shield, the light source system and the photoelectric detector are arranged on the gantry and suspended above the object placement platform, the object to be detected is placed on the object placement platform and passes under the gantry, the light source system emits detection light toward the object, the detection light is reflected by the surface of the object and received by the photoelectric detector, the light source system and the photoelectric detector are arranged in the light shield, and a light-transmitting groove is arranged at the lower part of the light shield. According to the technical solution provided by the present invention, the thickness of the oil film on the oiled surface of the object can be comprehensively and continuously measured, which is used to optimize the process parameters and improve the oiling quality of the object surface.

Description

Technical Field

[0001] The invention belongs to the field of measurement technology, and in particular relates to an online measurement device for the oil film thickness on the surface of an object. Background Art

[0002] In the prior art, some metal and non-metal surfaces need to be oiled during the working process. During the surface oiling process, the distribution and uniformity of the oil film thickness are crucial. The types of oiling include lubricating oil, anti-rust oil, drawing oil, cleaning fluid, food preservative oil, etc. The accuracy of the oiling quality and whether the distribution of the oiled surface meets the requirements are the core of the oiling quality control. How to quickly and comprehensively detect the oiling effect of all surfaces of the object is a technical problem that needs to be solved urgently. Summary of the invention

[0003] In order to solve all or part of the above problems, the present invention aims to provide an online measuring device for the oil film thickness on the surface of an object, which can comprehensively and continuously measure the oil film thickness on the oiled surface of the object.

[0004] The present invention provides an online measurement device for the oil film thickness on the surface of an object, comprising an object placement platform, a gantry, a light shield, a light source system and a photoelectric detector. The light shield, the light source system and the photoelectric detector are arranged on the gantry and suspended above the object placement platform. The object placement platform transports the detected object to pass through the bottom of the gantry. The light source system emits detection light toward the object. The detection light is reflected by the surface of the object and received by the photoelectric detector. The light source system and the photoelectric detector are arranged in the light shield, and a light-transmitting groove is arranged at the lower part of the light shield.

[0005] Optionally, the detection light is infrared light with a wavelength of 1000-5000nm.

[0006] Optionally, the object placement platform includes a main frame, on which a conveyor belt, a drive motor and an encoder are provided, the drive motor drives the conveyor belt to circulate, and the encoder detects the conveying distance of the conveyor belt.

[0007] Optionally, a moving device is provided under the gantry, and the moving device includes casters, a drive motor and an encoder. The casters support the gantry, the drive motor drives the casters to rotate, the encoder detects the conveying distance of the casters, and tracks are provided on both sides of the object placement platform to guide the casters.

[0008] Optionally, it also includes a control system and an image processing system, wherein the control system controls the operation of the drive motor of the object placement platform, thereby controlling the moving speed of the conveyor belt or casters, and the image processing system draws the surface oil film distribution value of the measured object, and then displays it graphically and archives it in a database.

[0009] Optionally, the light source system includes a detection light modulation module and a detection light compensation module, the detection light modulation module includes a condenser, a light source, a lens, a filter and a strip optical system, the light emitted from the light source is reflected by the condenser, and then sequentially adjusted by the lens, the filter and the strip optical system to be emitted to the object, the detection light compensation module includes a plane mirror, an optical adjustment device and a compensation light detector, the light emitted from the light source is reflected by the plane mirror, and then sequentially adjusted by the optical adjustment device to be emitted to the compensation light detector.

[0010] Optionally, the optical filters include a measuring filter and a reference filter, which are driven by a driving device to alternately appear between the lens and the strip optical system.

[0011] Optionally, the detection light emitted by the light source system is optically modulated after being reflected all the way and irradiated on the compensation light detector to form a light intensity I C2 The other beam is converged and collimated, and then passes through the filter to obtain the measurement beam λ1 and the reference beam λ2 required for measurement. These two beams are alternately irradiated on the object to be detected, and enter the photoelectric detector after reflection, and the light intensity I is obtained respectively. λ1 and I λ2 , and add the compensation light detector measured light intensity I stored during instrument calibration C1 , and we get the following formula:

[0012]

[0013] According to the formula, the measured value M is compared with the calibration curve to obtain the accurate oil film thickness value.

[0014] Optionally, the light source system and the photodetector each include several groups, several of the light source systems are arranged in a row, and several of the photodetectors are arranged in a row.

[0015] Optionally, the gantry includes a column and a crossbeam, the crossbeam is provided with a first connecting plate and a second connecting plate, the first connecting plate is parallel to the crossbeam, the second connecting plate is perpendicular to the first connecting plate, the light shield is connected and fixed to the first connecting plate, the light source system is connected and fixed to the second connecting plate, and the photoelectric detector is connected and fixed to the top plate of the light shield.

[0016] Optionally, an electric control box is provided on one side column of the gantry.

[0017] It can be seen from the above technical solution that the online measuring device for oil film thickness on the surface of an object provided by the present invention has the following advantages:

[0018] The device can comprehensively and continuously measure the oil film thickness on the oiled surface of the object, and then provide an oil film distribution image on the measured workpiece surface, which is convenient for technicians to observe.

[0019] The device can effectively avoid interference from external stray light sources and disturbing light sources, and at the same time avoid light path pollution caused by dust, water vapor, etc. at the work site, thereby improving the accuracy of oil film measurement.

[0020] The device provides data required for the oiling operation, such as detection, feedback, closed-loop control, etc., and can be used to optimize the process parameters and improve the oiling quality of the surface of the object. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of an online measuring device for the oil film thickness on the surface of an object in an embodiment of the present invention;

[0022] Figure 2 It is a measurement principle diagram of an online measurement device for oil film thickness on an object surface in an embodiment of the present invention;

[0023] Figure 3 4 is a circuit schematic diagram of an online measurement device for oil film thickness on an object surface in an embodiment of the present invention.

[0024] Explanation of the reference numerals: 1. Main frame; 2. Conveyor belt; 3. Drive motor; 4. Encoder; 5. Gantry; 501. First connecting plate; 502. Second connecting plate; 6. Electric control box; 7. Light source system; 701. Condenser; 702. Light source; 703. Lens; 704. Measuring filter; 705. Reference filter; 706. Drive device; 707. Strip optical system; 708. Plane mirror; 709. Optical adjustment device; 710. Compensating light detector; 8. Photodetector; 9. Light shield. DETAILED DESCRIPTION

[0025] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of an online measurement device for oil film thickness on an object surface of the present invention in conjunction with the accompanying drawings.

[0026] Example 1

[0027] like Figure 1 , Figure 2 , Figure 3As shown, an online measuring device for the oil film thickness on the surface of an object according to Example 1 of the present invention comprises an object placement platform, a gantry 5, a light shield 9, a light source system 7 and a photoelectric detector 8. The light shield 9, the light source system 7 and the photoelectric detector 8 are arranged on the gantry 5 and suspended above the object placement platform. The object placement platform transports the object to be detected to pass through the bottom of the gantry 5. The light source system 7 emits detection light toward the object. The detection light is infrared. The detection light is reflected by the surface of the object and received by the photoelectric detector 8. The light source system 7 and the photoelectric detector 8 are arranged in the light shield 9. A light-transmitting groove is arranged at the lower part of the light shield 9.

[0028] In this embodiment, the suitable wavelength of infrared rays is 1000-5000nm, selected in the near infrared and mid infrared regions. The light source system 7 is an infrared light source system, and the photoelectric detector 8 is an infrared detector, which can be an infrared camera device.

[0029] By means of the above-mentioned on-line measuring device for the oil film thickness on the surface of an object, the oil film thickness on the oiled surface of the object can be comprehensively and continuously measured, so as to be used for optimizing the process parameters and improving the oil coating quality on the surface of the object.

[0030] The cross-sectional shape of the light shield 9 is composed of an upper trapezoid and a lower rectangle. The light shield 9 is closed on all sides, and only the emitted and reflected infrared rays pass through the light-transmitting grooves at the bottom. The light shield 9 effectively shields the interference of external stray light sources and infrared disturbance light sources, while avoiding dust, water vapor and other pollution of the light path at the work site, which can improve the accuracy of oil film measurement.

[0031] like Figure 1 As shown, the object placement platform includes a main frame 1, on which a conveyor belt 2, a drive motor 3 and an encoder 4 are arranged. Support rollers can be arranged on the main frame 1 to support the conveyor belt 2. The drive motor 3 drives the conveyor belt 2 to circulate, and the encoder 4 detects the conveying distance of the conveyor belt 2, which is equivalent to the Y value of the plane coordinate.

[0032] like Figure 3 As shown, the online measuring device for the oil film thickness on the surface of an object also includes a control system and an image processing system. The control system controls the operation of the driving motor 3 of the object placement platform, thereby controlling the moving speed of the conveyor belt 2. The image processing system draws the surface oil film distribution value of the measured object, and then displays it graphically and archives it in a database. The image processing system can be connected to a display to display the surface oil film distribution value of the measured object in a planar manner (X-axis coordinate & Y-axis coordinate).

[0033] like Figure 2As shown, the light source system 7 includes a detection light modulation module and a detection light compensation module. The detection light modulation module includes a condenser 701, a light source 702, a lens 703, a filter (including a measurement filter 704 and a reference filter 705) and a strip optical system 707. The light emitted from the light source 702 is reflected by the condenser 701, and then sequentially passes through the adjustment of the lens 703, the filter and the strip optical system 707 to be emitted to the object. The detection light compensation module includes a plane mirror 708, an optical adjustment device 709 and a compensation light detector 710. The light emitted from the light source 702 is reflected by the plane mirror 708, and then sequentially passes through the adjustment of the optical adjustment device 709 to be emitted to the compensation light detector 710.

[0034] The strip optical system 707 can modulate the point light source into a uniform linear light source of a certain length, which is equivalent to the X value of the plane coordinate in the length direction of the strip optical system 707.

[0035] The filter can modulate the light emitted by the light source 702 into infrared light. The filter includes a measuring filter 704 and a reference filter 705, which are alternately driven between the lens 703 and the strip optical system 707 by a driving device 706. The driving device 706 can be a stepping motor. The measuring filter 704 and the reference filter 705 are installed on a rotating bracket. The driving device 706 drives the rotating bracket to rotate at a predetermined angle, and adjusts the measuring filter 704 and the reference filter 705 to the light path between the lens 703 and the strip optical system 707 in sequence.

[0036] It should be noted that the online measuring device for the thickness of oil film on the surface of an object needs to be calibrated before measurement to obtain a calibration curve as a basis for comparing oil films of different thicknesses. When calibrating the instrument, the detection light emitted by the light source system 7 is reflected all the way and then optically modulated, and then irradiated on the compensation light detector 710 to form a light intensity I C The other path is converged, collimated, and then filtered to obtain the measurement beam λ1 and reference beam λ2 required for measurement. The measurement beam λ1 is formed by the detection light passing through the measurement filter 704, and the reference beam λ2 is formed by the detection light passing through the reference filter 705. These two beams are alternately irradiated on the detected object, and enter the photodetector 8 after reflection, and the light intensity I λ1 and I λ2 , we get the following formula (1):

[0037]

[0038] According to formula (1), the instrument is calibrated with oil films of different thicknesses, the calibration curve is calculated, and the light intensity value I measured by the compensation light detector is stored at the same time. C , denoted as I C1 .

[0039] When used for measurement, the detection light emitted by the light source system 7 is reflected all the way and then optically modulated, and then irradiated on the compensation light detector 710 to form a light intensity I C2 The other beam is converged, collimated, and then filtered to obtain the measurement beam λ1 and reference beam λ2 required for measurement. These two beams are alternately irradiated on the object to be detected, and after reflection, they enter the photodetector 8 to obtain the light intensity I λ1 and I λ2 , and add the compensation light detector stored during calibration to measure the light intensity I C1 , we get the following formula (2):

[0040]

[0041] According to formula (2), the measured value M is compared with the calibration curve to obtain the accurate oil film thickness value.

[0042] like Figure 1 As shown, the light source system 7 and the photodetector 8 each include several groups, several light source systems 7 are arranged in a row, and several photodetectors 8 are arranged in a row.

[0043] The gantry 5 includes a column and a crossbeam, and a first connecting plate 501 and a second connecting plate 502 are arranged on the crossbeam. The first connecting plate 501 is parallel to the crossbeam, and the second connecting plate 502 is perpendicular to the first connecting plate 501. The light shield 9 is connected and fixed to the first connecting plate 501, the light source system 7 is connected and fixed to the second connecting plate 502, and the photoelectric detector 8 is connected and fixed to the top plate of the light shield 9.

[0044] An electric control box 6 is arranged on one side column of the gantry 5, and is used to connect the power supply and control the start and stop of the online measuring device of the oil film thickness on the surface of the object.

[0045] The on-line measuring device for the oil film thickness on the surface of an object in this embodiment can comprehensively and continuously measure the oil film thickness on the oiled surface of the object, and then provide an oil film distribution image on the surface of the measured workpiece, which is convenient for technicians to observe.

[0046] The device can effectively avoid interference from external stray light sources and disturbing light sources, and at the same time avoid light path pollution caused by dust, water vapor, etc. at the work site, thereby improving the accuracy of oil film measurement.

[0047] The device provides data required for the oiling operation, such as detection, feedback, closed-loop control, etc., and can be used to optimize the process parameters and improve the oiling quality of the surface of the object.

[0048] Example 2

[0049] The embodiment 2 of the present invention provides an online measuring device for the oil film thickness on the surface of an object, which is different from the embodiment 1 in that: no conveying device is provided on the object placement platform, and the detected object is stationary on the object placement platform, but the light source system 7, the photoelectric detector 8, and the light shield 9 are moved together. To this end, a moving device can be provided under the gantry 5, and the moving device includes casters, a drive motor and an encoder. The casters support the gantry 5, the drive motor drives the casters to rotate, and the encoder detects the conveying distance of the casters. Tracks are provided on both sides of the object placement platform to guide the casters, and the tracks can be provided on the ground on both sides of the object placement platform.

[0050] The online measuring device for the oil film thickness on the surface of an object also includes a control system and an image processing system. The control system controls the operation of the driving motor of the object placement platform, thereby controlling the moving speed of the casters. The image processing system draws the surface oil film distribution value of the measured object, and then displays it graphically and archives it in a database. The image processing system can be connected to a display to display the surface oil film distribution value of the measured object in a planar manner (X-axis coordinate & Y-axis coordinate).

[0051] In this embodiment, other structures of the device for online measuring the oil film thickness on the surface of an object are the same as those in Embodiment 1 and will not be described again here.

[0052] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0053] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0054] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An online measuring device for the oil film thickness on the surface of an object, characterized in that: The device comprises an object placement platform, a gantry, a light shield, a light source system and a photoelectric detector. The light shield, the light source system and the photoelectric detector are arranged on the gantry and suspended above the object placement platform. The detected object is placed on the object placement platform and passes under the gantry. The light source system emits detection light toward the object. The detection light is reflected by the surface of the object and received by the photoelectric detector. The light source system and the photoelectric detector are arranged in the light shield. A light-transmitting groove is arranged at the lower part of the light shield. The detection light is infrared light with a wavelength of 1000-5000nm; The light source system comprises a detection light modulation module and a detection light compensation module, wherein the detection light modulation module comprises a condenser, a light source, a lens, a filter and a strip optical system, wherein the light emitted from the light source is reflected by the condenser, and then sequentially adjusted by the lens, the filter and the strip optical system to be emitted to the object, and the detection light compensation module comprises a plane mirror, an optical adjustment device and a compensation light detector, wherein the light emitted from the light source is reflected by the plane mirror, and then sequentially adjusted by the optical adjustment device to be emitted to the compensation light detector; The optical filters include a measuring filter and a reference filter, which are alternately driven by a driving device and appear between the lens and the strip optical system; The detection light emitted by the light source system is reflected all the way and then optically modulated, and then irradiated on the compensation light detector to form a light intensity I C2 The other beam is converged and collimated, and then passes through the filter to obtain the measurement beam λ1 and the reference beam λ2 required for measurement. These two beams are alternately irradiated on the object to be detected, and enter the photoelectric detector after reflection, and the light intensity I is obtained respectively. λ1 and I λ2 , and add the compensation light detector measured light intensity I stored during instrument calibration C1 , and we get the following formula: According to the formula, the measured value M is compared with the calibration curve to obtain the accurate oil film thickness value.

2. The on-line measuring device for oil film thickness on the surface of an object according to claim 1, characterized in that: The object placement platform comprises a main frame, on which a conveyor belt, a driving motor and an encoder are arranged, wherein the driving motor drives the conveyor belt to circulate, and the encoder detects the conveying distance of the conveyor belt; Alternatively, a moving device is provided under the gantry, and the moving device includes casters, a drive motor and an encoder. The casters support the gantry, the drive motor drives the casters to rotate, the encoder detects the conveying distance of the casters, and tracks are provided on both sides of the object placement platform to guide the casters.

3. The on-line measuring device for oil film thickness on the surface of an object according to claim 2, characterized in that: It also includes a control system and an image processing system. The control system controls the operation of the drive motor of the object placement platform, thereby controlling the moving speed of the conveyor belt or casters. The image processing system draws the surface oil film distribution value of the detected object, and then displays it graphically and archives it in a database.

4. The on-line measuring device for oil film thickness on the surface of an object according to any one of claims 1 to 3, characterized in that: The light source system and the photodetector each include a plurality of groups, a plurality of the light source systems are arranged in a row, and a plurality of the photodetectors are arranged in a row.

5. The on-line measuring device for oil film thickness on the surface of an object according to claim 4, characterized in that: The gantry includes a column and a crossbeam, and the crossbeam is provided with a first connecting plate and a second connecting plate, the first connecting plate is parallel to the crossbeam, and the second connecting plate is perpendicular to the first connecting plate, the light shield is connected and fixed to the first connecting plate, the light source system is connected and fixed to the second connecting plate, and the photoelectric detector is connected and fixed to the top plate of the light shield.

6. The on-line measuring device for oil film thickness on the surface of an object according to claim 5, characterized in that: An electric control box is arranged on one side column of the gantry.

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