CN211199838U

CN211199838U - Self-adaptive backlight system for automatic cloth inspecting machine

Info

Publication number: CN211199838U
Application number: CN201921466526.3U
Authority: CN
Inventors: 李海芹; 毛潇雨; 李洋
Original assignee: Zhejiang Yisheng Technology Co ltd
Current assignee: Zhejiang Yisheng Technology Co ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-08-07
Anticipated expiration: 2029-09-05

Abstract

The application discloses a self-adaptation backlight system for an automatic cloth inspecting machine, which provides the best backlight brightness for the detection of a to-be-detected gray cloth. The self-adaptive backlight system for the automatic cloth inspecting machine comprises: the lamp box is arranged below the to-be-detected gray cloth to provide a light environment required by detection for the to-be-detected gray cloth; the thickness detection device is fixed on the lamp box so as to detect the thickness of the to-be-detected gray cloth and acquire thickness data; the brightness acquisition device is arranged above the to-be-detected gray cloth over the center point of the to-be-detected gray cloth to detect the backlight brightness of the to-be-detected gray cloth and acquire brightness data; and the brightness control device is controllably connected with the lamp box and respectively connected with the thickness detection device and the brightness acquisition device in a communication way to receive and process the thickness data and the brightness data, so that the brightness of the lamp box is adjusted to the optimal backlight brightness.

Description

Self-adaptive backlight system for automatic cloth inspecting machine

Technical Field

The utility model belongs to textile machinery equipment field, in particular to a self-adaptation backlight system for automatic cloth inspection machine.

Background

With the development of the automatic monitoring level in the textile production process and the improvement of the quality of yarns and fabrics, cloth inspection becomes an important link for improving the product quality. The cloth inspecting is a step of inspecting the gray cloth, aims to detect the defects of the fabric, marks the defects, and is mainly divided into manual cloth inspecting and automatic cloth inspecting according to an inspection mode.

The manual cloth inspection is a traditional fabric inspection method in the cloth textile industry, a person and a cloth inspection machine are adopted to carry out full inspection on produced fabrics, the manual cloth inspection detection speed is low, workers concentrate on the time, the time is limited, the missed inspection is easy to occur, and even the most skilled cloth inspection workers can only find out more than 70% of defects. Based on the fact that the reliability and the repeatability of defect detection by manual cloth inspection cannot meet the requirements, the automatic cloth testing system with high-speed reliability becomes the development direction of cloth inspection work. The automatic cloth inspecting method mainly adopts a linear array type CCD sensor camera or a CMOS sensor camera to carry out image acquisition on an object to be inspected under the fixed backlight condition, and then utilizes image processing to judge common defects.

In automatic perching, the backlight brightness is one of important factors influencing the sampling quality of an automatic perching image. In the process of sampling the moving gray cloth, if the brightness is too low after the backlight is covered, in order to ensure enough exposure, the camera can increase the shutter time, so that the smear phenomenon of the sampled image is aggravated; if the brightness is too high after the cloth is coated, overexposure of the sampled image can be caused, and the judgment of the subsequent detection algorithm on the defects can be influenced under both conditions.

Therefore, a need exists for an adaptive backlight system for an automatic cloth inspecting machine to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a self-adaptation backlight system for automatic cloth inspection machine can be according to the measuring environment automatic adjustment luminance in a poor light that is suitable for provide the best luminance environment in a poor light in the cloth inspection machine working process.

Another object of the utility model is to provide a self-adaptation backlight system for automatic cloth inspection machine, wherein, thickness detection device can carry out accurate detection to the greige cloth thickness that awaits measuring, provides the regulation basis for self-adaptation backlight system.

Another object of the utility model is to provide an adaptive backlight system for automatic cloth inspection machine, wherein, luminance collection system can filter the ambient light of other directions to make backlight can be detected, reduce the interference of ambient light to backlight brightness detection, the accurate luminance of being shaded of acquireing.

Another object of the utility model is to provide a self-adaptation backlight system for automatic cloth inspection machine can detect the gray cloth thickness reading that awaits measuring according to automatic cloth inspection machine's thickness detection module and correspond thickness data, just establishes luminance in a poor light to avoid stepping into grades and adjust and need the overlength time.

Another object of the utility model is to provide a self-adaptation backlight system for automatic cloth inspection machine, will be through adjusting the back most closely predetermine the PWM data of luminance and deposit in the address of corresponding thickness in the register, but directly read this data and just establish when the cloth of the same thickness needs to be measured to shorten the settling time.

The utility model provides a self-adaptation backlight system for automatic cloth inspection machine has solved the improper and detection difficulty that produces of ambient brightness in the work of cloth inspection machine effectively, does not relate to complicated equipment and introduces, and application effect is good, and the suitability is strong, has higher popularization nature.

The utility model aims at realizing through the following technical scheme:

an adaptive backlight system for an automatic cloth inspecting machine, which provides the best backlight brightness for the detection of the to-be-detected gray cloth, is characterized by comprising:

the lamp box is arranged below the to-be-detected gray cloth to provide a light environment required by detection for the to-be-detected gray cloth;

the thickness detection device is fixed on the lamp box so as to detect the thickness of the to-be-detected gray cloth and acquire thickness data;

the brightness acquisition device is arranged above the to-be-detected gray cloth over the center point of the to-be-detected gray cloth to detect the backlight brightness of the to-be-detected gray cloth and acquire brightness data; and

and the brightness control device is controllably connected with the lamp box and respectively connected with the thickness detection device and the brightness acquisition device in a communication way to receive and process the thickness data and the brightness data, so that the brightness of the lamp box is adjusted to the optimal backlight brightness.

Preferably, the thickness detection device includes a fixing device and two measuring devices disposed on the fixing device, wherein the measuring devices are correspondingly disposed on the fixing device, the fabric to be measured is disposed between the two measuring devices, and the plane of the fabric to be measured is perpendicular to the plane of the two measuring devices.

Preferably, the brightness acquisition device comprises a photoresistor and a light directional screening tube, the front end of the photoresistor light sensing part is sealed at one end of the light directional screening tube, and the light directional screening tube is perpendicular to the plane of the to-be-detected gray cloth.

Preferably, the light directional screening pipe comprises a packaging end and an opening end, the packaging end is used for packaging the photosensitive part of the photoresistor, and the opening end is arranged right at the central point of the blank cloth to be tested, so that backlight light enters the light directional screening pipe, and the backlight light is obtained by the photosensitive part of the photoresistor, and more accurate brightness data is obtained.

Preferably, the luminance controlling apparatus further comprises: the calculation analysis module comprises a thickness calculation module, a brightness calculation module and a gear adjustment module, wherein the thickness calculation module and the brightness calculation module are respectively connected with the thickness detection device and the brightness acquisition device in a communication mode, and are used for receiving, calculating and analyzing the thickness data and the brightness data to generate the thickness value and the brightness value; the register is connected with the calculation and analysis module in a communication mode, the register acquires the thickness value, extracts a corresponding optimal brightness value preset in the register through the thickness value, transmits the preset optimal brightness value to the gear adjustment module, and generates an adjustment instruction through comparison with the brightness value; and the regulating module is connected with the gear adjusting module in a communication way and acquires the adjusting instruction so as to adjust the brightness of the lamp box to the optimal backlight brightness.

Preferably, the regulation and control module further includes a PWM wave regulation unit and a backlight driving unit, the PWM wave regulation unit regulates according to the calculation result obtained by the calculation and analysis module, and the backlight driving unit correspondingly regulates the output driving voltage according to the regulated PWM wave to regulate the backlight brightness.

Preferably, the light box comprises a constant current plate to provide a light environment required for detection for the gray cloth to be detected, wherein the regulation and control module provides a PWM wave default gear with a corresponding duty ratio for the constant current plate for controlling the backlight brightness.

Preferably, the register is a Flash register.

Preferably, the register is communicably connected to the control module, and the register directly transmits the brightness level signal to the control module to generate an initial adjustment instruction, so as to perform initial setting on the backlight brightness in the light box.

Drawings

Fig. 1 is a block diagram of an adaptive backlight system for an automatic cloth inspecting machine according to the present invention;

fig. 2 is a schematic structural diagram of a thickness detection device and a brightness acquisition device of an adaptive backlight system for an automatic cloth inspecting machine according to the present invention;

fig. 3 is a schematic view of a work flow of the adaptive backlight system for an automatic cloth inspecting machine according to the present invention.

Detailed Description

The terms and words used in the following specification and claims are not limited to the literal meanings, but are used only by the inventors to enable a clear and consistent understanding of the invention. Accordingly, it will be apparent to those skilled in the art that the following descriptions of the various embodiments of the present invention are provided for illustration only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.

While ordinal numbers such as "first," "second," etc., will be used to describe various components, those components are not limited herein. The term is used only to distinguish one element from another. For example, a first component could be termed a second component, and, similarly, a second component could be termed a first component, without departing from the teachings of the inventive concepts. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, numbers, steps, operations, components, elements, or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.

Terms used herein, including technical and scientific terms, have the same meaning as terms commonly understood by one of ordinary skill in the art, unless otherwise defined. It will be understood that terms defined in commonly used dictionaries have meanings that are consistent with their meanings in the prior art.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

Fig. 1 to fig. 3 illustrate an adaptive backlight system 1 for an automatic cloth inspecting machine according to a preferred embodiment of the present application, wherein the present invention provides an adaptive backlight system 1 for an automatic cloth inspecting machine, which is used for adjusting the brightness of a lamp box 10 of the automatic cloth inspecting machine to provide an optimal backlight brightness environment for detecting a blank M to be detected.

As shown in fig. 1 to 3, an adaptive backlight system 1 for an automatic cloth inspecting machine, for providing an optimal backlight brightness for detecting a to-be-detected gray cloth M, includes: the light box 10 is arranged below the to-be-detected gray cloth M, and the light box 10 is used for providing a light environment required by detection for the to-be-detected gray cloth M; the thickness detection device 20 is fixed on the lamp box 10, so as to detect the thickness of the grey cloth M to be detected and acquire thickness data; the brightness acquisition device 30 is arranged above the to-be-detected gray cloth M just opposite to the central point of the to-be-detected gray cloth M, so as to detect the backlight brightness of the to-be-detected gray cloth M and acquire brightness data; and a brightness control device 40, wherein the brightness control device 40 is controllably connected with the light box 10 and respectively communicably connected with the thickness detection device 20 and the brightness acquisition device 40 to receive and process the thickness data and the brightness data and generate an adjustment instruction, thereby adjusting the brightness of the light box 10 to an optimal backlight brightness.

As shown in fig. 2, the thickness detecting device 20 includes a fixing device 21 and two measuring devices 22 disposed on the fixing device 21, wherein the two measuring devices 22 are correspondingly disposed on the fixing device 21, and the fabric blank M to be measured is disposed between the two measuring devices 22. Preferably, the plane of the fabric blank M to be measured is perpendicular to the plane of the two measuring devices 22. In other words, the connecting line of the two measuring devices 22 is perpendicular to the plane of the fabric M to be measured, so as to accurately obtain the thickness data. In particular, the two measuring devices 22 may further be implemented as a distance meter. In practical applications, the range finder is preferably an infrared range finder.

It is worth mentioning that the fixing device 21 can further be implemented as a C-shaped bracket, and the two measuring devices 22 are respectively arranged at two ends of the fixing device 21. The thickness detection device 20 is detachably fixed to the lamp box 10 by the fixing device 21. Preferably, the thickness detection device 20 is fixed at the lower right edge of the light box 10 to achieve an optimal position configuration. In practical operation, the thickness detection device 20 is fixed at a proper position on the lamp box 10, the gray cloth M to be detected is placed on the lamp box 10, and the gray cloth M to be detected passes through the thickness detection device 20. At this time, the fabric blank M to be measured is located between the two measuring devices 22, and the plane of the fabric blank M to be measured is perpendicular to the connecting line of the two measuring devices 22. In practice, the blank cloth M to be detected should be straightened to ensure no folds, the tension of the cloth is uniform and basically consistent with that of an applicable cloth inspecting machine when the cloth inspecting machine is opened, and early-stage preparation is made for blank cloth detection.

As shown in fig. 3, the brightness collecting device 30 includes a photo resistor 31 and a light directional screening tube 32, the front end of the light sensing portion of the photo resistor 31 is connected to one end of the light directional screening tube 32, wherein the light directional screening tube 32 is perpendicular to the plane where the greige cloth M to be measured is located, and filters other environmental light sources to avoid the interference of the environmental light source on the light sensing of the photo resistor 31. Preferably, the light directional screening tube 32 is directly opposite to the central point of the greige cloth M to be measured, so as to obtain more accurate brightness data.

Specifically, the light-directing sieve tube 32 is a long and narrow light-tight tube, and has an encapsulating end 321 and an open end 322, the encapsulating end 321 encapsulates the light-sensing portion of the light-sensing resistor 31, and the open end 322 allows light to enter the light-directing sieve tube 32. The opening end 322 allowing the light to enter is opposite to the central point of the fabric M to be measured, so that the light in the environment where the fabric M to be measured is located enters the light directional screening tube 32, and is received by the light sensing part of the photo resistor 31, and the brightness data is acquired. For the purpose of filtering the ambient light, the light directional screening tube 32 is a black tube.

Furthermore, the brightness collecting device 30 can be fixed to the center point of the fabric blank M or stably suspended above the fabric blank M by disposing a three-dimensional bracket (not shown). In order to achieve the minimum device configuration, the fixing frame 21 of the thickness collecting device 20 is appropriately extended by the transverse dimension to detachably fix the brightness collecting device 30 on the fixing frame 21, so as to detect the backlight brightness of the to-be-detected gray cloth M and acquire the brightness data. It should be understood by those skilled in the art that the fixing manner of the brightness acquisition device M is not limited by the present application.

Accordingly, the present application further provides the brightness control device 40 for effectively processing the acquired thickness data and the acquired brightness data and realizing the adaptive adjustment of the backlight brightness.

As shown in fig. 1 to 3, the luminance controlling apparatus 40 further includes: a calculation and analysis module 41, wherein the calculation and analysis module 41 includes a thickness calculation module 411, a brightness calculation module 412 and a gear adjustment module 413, wherein the thickness calculation module 411 and the brightness calculation module 412 are respectively communicably connected with the thickness detection device 20 and the brightness acquisition device 30, and receive and calculate and analyze the thickness data and the brightness data to generate the thickness value and the brightness value; a register 42, wherein the register 42 is communicably connected to the calculation and analysis module 41, and the register 42 acquires the thickness value, extracts a corresponding optimal brightness value preset in the register 42 through the thickness value, and transmits the preset optimal brightness value to the gear adjustment module 413, and generates an adjustment instruction through comparison with the brightness value; a control module 43, wherein the control module 43 is communicably connected to the gear adjustment module 413 and obtains the adjustment instruction to adjust the brightness of the light box 10 to an optimal backlight brightness.

Specifically, the thickness calculation module 411 converts the acquired physical quantity into a voltage signal, and converts the voltage signal as an analog quantity into a digital quantity through an a/D converter, wherein the thickness calculation module 411 converts the physical signal into the voltage signal through a sensor. The a/D converter includes two sets of voltage receiving units to respectively obtain the voltage signals converted from the thickness related signals obtained by the two measuring devices 22, and the voltage signals are converted into the digital thickness value by the a/D conversion unit and transmitted to the register 42. And reading the brightness gear at which the brightness value corresponding to the thickness preset in the register 42 is located according to the digital quantity.

Further, the register 42 is communicably connected to the control module 43, the register 42 directly transmits the brightness shift signal to the control module 43 to generate an initial adjustment instruction, and the control module 43 performs initial setting on the backlight brightness in the light box 10, so as to avoid that a series of step-by-step adjustments performed by the brightness acquisition device 40 takes too long time. In other words, when the adaptive backlight system 1 is used for an automatic cloth inspecting machine, the initial setting of the backlight brightness is only required to be performed according to the thickness of the gray cloth M to be measured, and further, the proper adjustment is performed according to the data of the brightness acquisition device 40.

The luminance calculation module 412 converts the acquired physical quantity into a voltage signal, and converts the voltage signal as an analog quantity into a digital quantity through an a/D converter. The a/D converter of the brightness calculation module 412 is a voltage receiving unit, and the brightness calculation module performs a/D conversion on the voltage value detected by the light sensitive resistor, converts the voltage value into a corresponding digital quantity, and transmits the digital quantity to the gear adjustment module 413. It is worth mentioning that the digital quantity output by the brightness calculation module 412 is the intensity of the light intensity.

Further, after the light box 10 has the initial brightness, the brightness collecting device 30 collects the brightness information and transmits the brightness information to the brightness calculating module 412 to generate the brightness value, and further transmits the brightness value to the gear adjusting module 413, at this time, the register 42 transmits the brightness value corresponding to the brightness gear to the gear adjusting module 413, and the gear adjusting module 413 performs comparison calculation on the brightness value and the brightness value corresponding to the brightness gear, so as to generate the adjusting instruction. In particular, the adjusting instruction is to increase or decrease the first-gear brightness.

The regulation and control module 43 further includes a PWM wave adjustment unit 431 and a backlight driving unit 432, wherein the PWM wave adjustment unit 431 adjusts the duty ratio of the PWM wave according to the adjustment instruction, and the backlight driving unit 432 correspondingly adjusts the output driving voltage according to the adjusted PWM wave, so as to achieve the function of adjusting the backlight brightness.

In practice, the PWM wave adjustment unit 431 and the backlight driving unit 432 may be implemented by corresponding circuits, wherein the backlight driving unit 432 is further a constant current driving circuit.

It should be understood that the registers 42 can be used to temporarily store instructions, data, and addresses. In this embodiment of the application, the register 42 may correspondingly store the thickness of the fabric blank M to be tested and the brightness level information corresponding to the thickness. When the adaptive backlight system is applied to an automatic cloth inspecting machine, the register 42 may match the corresponding brightness level according to the M thickness of the greige cloth to be inspected.

In the embodiment of the present application, the light box 10 includes a constant current board to provide a light environment required for detection for the fabric M to be detected, wherein the adjusting and controlling module 43 provides a PWM wave default gear with a corresponding duty ratio for the constant current board for controlling the backlight brightness. When the brightness value detected by the photo resistor 31 is closest to the preset optimal brightness value at the current shift position, the current shift position is recorded in the register 42 and corresponds to the corresponding thickness, and the current shift position is used as the default shift position of the thickness. In subsequent use, when the blank cloth M to be measured with the same thickness is measured, the gear data can be directly read from the register 42 for initial backlight setting, so that the setting time is shortened. Preferably, the register 42 is a Flash register.

It is worth mentioning that in the present application, the backlight is adjusted to the best brightness value and corresponds to the best gear through multiple times of brightness acquisition and analysis calculation, so as to provide the backlight capable of automatically adjusting the brightness according to different environments for the detection system. Specifically, if the calculation and analysis module 41 determines that the brightness detection is performed twice and is divided into two sides of the preset brightness, a first gear close to the preset brightness is selected as the stable brightness of the current gray cloth, and the brightness gear is stored in the address of the register 42 corresponding to the thickness gear.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An adaptive backlight system for an automatic cloth inspecting machine, which provides the best backlight brightness for the detection of the to-be-detected gray cloth, is characterized by comprising:

the thickness detection device is fixed on the lamp box and comprises a fixing device and two measuring devices arranged on the fixing device, wherein the measuring devices are correspondingly arranged on the fixing device, the to-be-detected gray cloth is arranged between the two measuring devices, and the plane of the to-be-detected gray cloth is perpendicular to the plane of the two measuring devices so as to detect the thickness of the to-be-detected gray cloth and acquire thickness data;

and the brightness control device is controllably connected with the lamp box and respectively connected with the thickness detection device and the brightness acquisition device in a communication way so as to receive and process the thickness data and the brightness data and generate an adjusting instruction, so that the brightness of the lamp box is adjusted to the optimal backlight brightness.

2. The adaptive backlight system for the automatic cloth inspecting machine according to claim 1, wherein the brightness collecting device comprises a photoresistor and a light directional screening tube, a front end of the photoresistor light sensing part is sealed at one end of the light directional screening tube, and the light directional screening tube is arranged perpendicular to a plane of the gray cloth to be measured.

3. The adaptive backlight system for automatic cloth inspecting machine according to claim 2, wherein the light directional screening tube comprises a packaging end and an open end, the packaging end is used for packaging the photosensitive part of the photo resistor, the open end is disposed opposite to the central point of the embryonic cloth to be inspected, so that the backlight light enters the light directional screening tube, and the backlight light is obtained by the photosensitive part of the photo resistor, so as to obtain more accurate brightness data.

4. The adaptive backlight system for automatic cloth inspecting machine according to any one of claims 1 or 3, wherein the light box comprises a constant current board to provide a light environment required for detection for the gray cloth to be detected, wherein the brightness control device provides PWM wave default gear with corresponding duty ratio for the constant current board for controlling backlight brightness.

5. The adaptive backlight system for automatic cloth inspecting machine according to claim 4, wherein the brightness control device comprises a register, and the register is a Flash register.