CN105486717A - Thermo-sensitive damage detection method for back heat source of logistics combined transportation flat pallet - Google Patents
Thermo-sensitive damage detection method for back heat source of logistics combined transportation flat pallet Download PDFInfo
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- CN105486717A CN105486717A CN201510943550.1A CN201510943550A CN105486717A CN 105486717 A CN105486717 A CN 105486717A CN 201510943550 A CN201510943550 A CN 201510943550A CN 105486717 A CN105486717 A CN 105486717A
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- flat tray
- logistics combined
- combined transport
- logistics
- transport flat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
Abstract
The invention discloses a thermo-sensitive damage detection method for back heat source of a logistics combined transportation flat pallet. The thermo-sensitive damage detection method for shooting the hot spot distribution situation after constant-speed hot air flow flows through the logistics combined transportation flat pallet through a thermo-sensitive camera is adopted. A damage detection system structure is composed of the thermo-sensitive camera and a hot air flow outlet. The thermo-sensitive camera is right opposite to the side face of the logistics combined transportation flat pallet. Constant-speed hot air flow flows into the hot air flow outlet through an external air blower. Constant-speed hot air flow penetrates through the logistics combined transportation flat pallet upwards. Damage detection is conducted on the logistics combined transportation flat pallet through the thermo-sensitive camera, the deep mechanical structure of the tray can be detected, the ageing damage of the traditional thermo-sensitive damage detection technology to the logistics combined transportation flat pallet can be eliminated, the damage detection efficiency is high, cost is low, the structure is simple, and wide application prospects are achieved.
Description
Technical field
The present invention relates to a kind of logistics combined transport flat tray back of the body thermal source temperature-sensitive inspection damage method, particularly relate to the method utilizing and detected support holder structure defect by thermal camera from steady background heat air-flow, belong to logistics checkout equipment technical field.
Background technology
Pallet is the standardized important carriers of modern logistics, and be widely used in the logistics progresses such as Storage of Goods, handling, transport, plastic pallet is compared with wood composite pallet, and having support holder structure can be customized, long-lived advantage.Plastic pallet is in ongoing operations process, and the haulage equipment such as fork truck, piler impact several times, friction, be easy to cause crack, cut; The side extruding that bearing goods Action of Gravity Field, maloperation cause, also can cause distortion, distortion, fall apart; High temperature, low temperature, high humidity environment can cause ageing of plastics, be full of cracks.Plastic pallet is once enter circulation circulation, and aging breakage is different, needs regularly to carry out general inspection to each pallet.
At present, plastic pallet detects and mainly contains artificial naked eyes method, machine vision method and thermal camera detection method, and artificial naked eyes method is by the damaged degree having experience operating personnel to judge plastic pallet, determines whether eliminated; Thermal camera detection method is by plastic pallet is heated to uniform temperature, takes the infrared thermal imagery of its structure, the damaged degree of analytical structure; And machine vision method is by common industrial camera, gather tray surface image, its structural failure grade of intellectual analysis.
Machine vision method is more scientific relative to artificial naked eyes method, and check and evaluation result quantization degree is high, low relative to thermal camera method cost, and to plastic pallet without secondary damage, testing environment requires low, and detection speed is fast.But because the damaged structure of plastic pallet mostly is spatial structure: cavity, flanging, disconnected beam, under common light conditions, on the plane of delineation, damaged part has shade more, and the irregular stamper architecture of plastic pallet also many spatially structures itself, bring the error and difficulty measuring and detect.
Cigarette combined transport flat tray be cigarette put one's child in a boarding nursery dish through transport important carrier.According to People's Republic of China (PRC) tobacco business standard YC/T215-2007 " tobacco business universal pallet for through transport " regulation, the nominal contour dimension of cigarette combined transport flat tray long (
l) × wide (
w) × high (
h) be 1000mm × 1250mm × 150mm, through transport pallet adopts plastics (low-pressure high-density polyethylene HDPE or polypropylene PP) material.In four enter fork, one side uses, top bed board is form, polycrystalline substance is III-shaped structure.
In the routine use process of cigarette combined transport flat tray, standardized pallet after a certain period of use, there is certain change in its outward appearance, physicochemical characteristics, pallet disrepair phenomenon often cannot be unavoidable, in the pallet application scenario that the automaticities such as shelf magazine are higher, the damaged degree of pallet determines that can pallet continue the important indicator used.
The plastic construction of cigarette combined transport flat tray has certain closure, object is the physical strength strengthening pallet self, but in routine use process, the disappearance of pallet partial structurtes often occurs, cause the destruction of pallet enclosed construction, cause pallet mechanical resistance Compressive Strength to decline.
Cigarette combined transport flat tray damage testing method has machine visual detection method, fiber reflection detection method, and thermal camera detection method.Thermal camera detection method adopts thermal camera (also claiming " thermal infrared imager "), uniform temperature is heated to pallet by calorifier, pallet self becomes an infrared source, gathers pallet heat radiation photo, analyze the mechanical damage such as crackle, defect of pallet by thermal camera.The shortcoming of this thermal camera detection method is: necessary heating of plastic pallet is to uniform temperature, although this high temperature can not cause plastic pallet to melt or deformation set occurs, but prolonged and repeated high-temperature baking, can accelerate the ageing process of plastic pallet, shortens its serviceable life.On the other hand, the heating of plastic pallet and cooling all need regular hour and place, not only extend unit pallet detection time, too increase the working area detecting station.
Summary of the invention
The object of the invention is to solve existing above-mentioned technical matters, provide a kind of logistics combined transport flat tray to carry on the back thermal source temperature-sensitive inspection damage method.In order to realize above object, technical scheme of the present invention is the temperature-sensitive inspection damage method adopting thermal camera shooting constant speed thermal current to flow through the hotspot's distribution situation after logistics combined transport flat tray.
Inspection is damaged system architecture and is made up of thermal camera, thermal current air outlet;
Described thermal camera is just to the side of logistics combined transport flat tray;
Described thermal current air outlet is blown into constant speed thermal current by external fan blower, and constant speed thermal current upwards runs through logistics combined transport flat tray;
Inspection damage process concrete steps comprise:
Step 1.1, pallet enter detection zone; When logistics combined transport flat tray to be transported to by transport tape thermal camera just to position after, transport tape stops;
Step 1.2, be blown into constant speed thermal current; Upwards run through logistics combined transport flat tray, the physical construction of logistics combined transport flat tray side makes constant speed thermal current, in edge, air-flow turbulence occur, local location generation thermal field non-uniform phenomenon, the exception of abnormal hot localised points corresponding logistics combined transport flat tray lateral mechanical structure;
Step 1.3, thermal camera are taken; The side temperature-sensitive picture of shooting logistics combined transport flat tray, for abnormal hot spots analysis;
Step 1.4, stopping air-out; Thermal current air outlet stops air-out;
Step 1.5, pallet shift out detection zone; Logistics combined transport flat tray takes away and detects position by transport tape;
Step 1.6, detection zone are recovered; Ambient temperature fast quick-recovery in detection zone is normal, for next logistics combined transport flat tray inspection harm prepares;
Step 1.7, thermal camera abnormal hot spots detect;
The concrete steps of described thermal camera abnormal hot spots detection method comprise:
Step 2.1: binaryzation; A selected heat degree threshold, the pixel being greater than this threshold value is focus, otherwise is non-focus, is distinguished the hot spot region of logistics combined transport flat tray side heat sensitive image from background;
Step 2.2: the Morphological scale-space of image; Erosion operator, Expanded Operators is repeatedly used to carry out Morphological scale-space to hot spot region successively;
Step 2.3: hot spot region is numbered; 4 connected domain algorithms are adopted to be numbered each hot spot region split;
Step 2.4: hot spot region abnormality detection; Compare with the hot spot region of normal logistics combined transport flat tray side heat sensitive image, calculate absolute difference total value by pixel, be greater than some threshold values, think that this hot spot region and normal hot spot region difference are comparatively greatly, exist physical construction abnormal conditions; Otherwise, think that the physical construction of this hot spot region belongs to normal condition.
Step 2.5: the abnormal scoring of focus; Mark to focus is abnormal according to the absolute difference total value calculated in step 2.4, the larger description architecture of revaluate is abnormal more serious, otherwise textural anomaly is more not serious.
In sum, the significant technique effect of the present invention is: adopt thermal camera to carry out inspection to logistics combined transport flat tray and damage, the physical construction of pallet deep layer can be detected, the Aging Damage of traditional thermal inspection damage technology for material pallets such as plastics can be overcome again, inspection damage efficiency is high, cost is low, and structure is simple, has broad application prospects.
Accompanying drawing explanation
Fig. 1 is the structure of the detecting device figure of a kind of logistics combined transport flat tray back of the body of the present invention thermal source temperature-sensitive inspection damage method;
Fig. 2 is the process flow diagram of a kind of logistics combined transport flat tray back of the body of the present invention thermal source temperature-sensitive inspection damage method;
Fig. 3 is that the unfilled corner temperature-sensitive of a kind of logistics combined transport flat tray back of the body of the present invention thermal source temperature-sensitive inspection damage method is as example;
Fig. 4 is that the disconnected limit temperature-sensitive of a kind of logistics of the present invention combined transport flat tray back of the body thermal source temperature-sensitive inspection damage method is as example;
Fig. 5 is that the crackle temperature-sensitive of a kind of logistics combined transport flat tray back of the body of the present invention thermal source temperature-sensitive inspection damage method is as example.
Embodiment
With reference to accompanying drawing, describe the present invention below.
As shown in Figure 1, the pick-up unit of logistics combined transport flat tray back of the body thermal source temperature-sensitive impairment method of the present invention is made up of thermal camera 100, thermal current air outlet 101; Thermal camera 100 is just to the side of logistics combined transport flat tray 102; When logistics combined transport flat tray 102 to be transported to by transport tape thermal camera 100 just to position after, transport tape stops, constant speed thermal current 103 is blown into by external fan blower from thermal current air outlet 101, constant speed thermal current 103 upwards runs through logistics combined transport flat tray 102, physical construction by logistics combined transport flat tray 102 side affects, air-flow turbulence is there is in constant speed thermal current 103 in edge, local location generation thermal field non-uniform phenomenon, the exception of abnormal hot localised points corresponding logistics combined transport flat tray 102 lateral mechanical structure; The side temperature-sensitive picture of logistics combined transport flat tray 102 is taken, for abnormal hot spots analysis by thermal camera 100; Afterwards, thermal current air outlet 101 stops air-out, and logistics combined transport flat tray 102 takes away and detects position by transport tape, detects the fast quick-recovery of position ambient temperature normal, examines harm prepare for next logistics combined transport flat tray 102.
As shown in Figure 2, the testing process of logistics combined transport flat tray back of the body thermal source temperature-sensitive impairment method of the present invention is based on above principle, and inspection damage process concrete steps comprise:
Step 1.1, pallet enter detection zone 200; When logistics combined transport flat tray to be transported to by transport tape thermal camera just to position after, transport tape stops;
Step 1.2, be blown into constant speed thermal current 201; Upwards run through logistics combined transport flat tray, the physical construction of logistics combined transport flat tray side makes constant speed thermal current, in edge, air-flow turbulence occur, local location generation thermal field non-uniform phenomenon, the exception of abnormal hot localised points corresponding logistics combined transport flat tray lateral mechanical structure;
Step 1.3, thermal camera shooting 202; The side temperature-sensitive picture of shooting logistics combined transport flat tray, for abnormal hot spots analysis;
Step 1.4, stopping air-out 203; Thermal current air outlet stops air-out;
Step 1.5, pallet shift out detection zone 204; Logistics combined transport flat tray takes away and detects position by transport tape;
Step 1.6, detection zone recover 205; Ambient temperature fast quick-recovery in detection zone is normal, for next logistics combined transport flat tray inspection harm prepares;
Step 1.7, thermal camera abnormal hot spots detect 206;
The concrete steps of described thermal camera abnormal hot spots detection method comprise:
Step 2.1: binaryzation 207; A selected heat degree threshold, the pixel being greater than this threshold value is focus, otherwise is non-focus, is distinguished the hot spot region of logistics combined transport flat tray side heat sensitive image from background;
Step 2.2: the Morphological scale-space 208 of image; Erosion operator, Expanded Operators is repeatedly used to carry out Morphological scale-space to hot spot region successively;
Step 2.3: hot spot region numbering 209; 4 connected domain algorithms are adopted to be numbered each hot spot region split;
Step 2.4: hot spot region abnormality detection 210; Compare with the hot spot region of normal logistics combined transport flat tray side heat sensitive image, calculate absolute difference total value by pixel, be greater than some threshold values, think that this hot spot region and normal hot spot region difference are comparatively greatly, exist physical construction abnormal conditions; Otherwise, think that the physical construction of this hot spot region belongs to normal condition.
Step 2.5: the abnormal scoring 211 of focus; Mark to focus is abnormal according to the absolute difference total value calculated in step 2.4, the larger description architecture of revaluate is abnormal more serious, otherwise textural anomaly is more not serious.
Embodiment: the unfilled corner of logistics combined transport flat tray back of the body thermal source temperature-sensitive impairment method of the present invention detects, as shown in Figure 3, the column bottom of logistics combined transport flat tray 102 has a unfilled corner 300 by fork truck yoke collision rift, under constant speed thermal current, the hot spots of logistics combined transport flat tray 102 side is as shown in thick black line, the edge focus of unfilled corner 300 is unfilled corner focus 301, in thermal camera imaging, there is obvious difference with normal logistics combined transport flat tray 102 physical construction.
Embodiment: the disconnected frontier inspection of logistics combined transport flat tray back of the body thermal source temperature-sensitive impairment method of the present invention is surveyed, as shown in Figure 4, there is a disconnected limit 400 in the crossbeam portion of logistics combined transport flat tray 102 by fork truck yoke collision rift, under constant speed thermal current, the hot spots of logistics combined transport flat tray 102 side is as shown in thick black line, the focus on disconnected limit 400 is disconnected limit focus 401, in thermal camera imaging, there is obvious difference with normal logistics combined transport flat tray 102 physical construction.
Embodiment: the crack detection of logistics combined transport flat tray back of the body thermal source temperature-sensitive impairment method of the present invention, as shown in Figure 5, there is a crackle 500 at the column position of logistics combined transport flat tray 102 by fork truck yoke collision rift, under constant speed thermal current, the hot spots of logistics combined transport flat tray 102 side is as shown in thick black line, the focus of crackle 500 is crackle focus 501, in thermal camera imaging, there is obvious difference with normal logistics combined transport flat tray 102 physical construction.
Claims (1)
1. a logistics combined transport flat tray back of the body thermal source temperature-sensitive inspection damage method, is characterized in that: adopt thermal camera shooting constant speed thermal current to flow through the temperature-sensitive inspection damage method of the hotspot's distribution situation after logistics combined transport flat tray;
Inspection is damaged system architecture and is made up of thermal camera, thermal current air outlet;
Described thermal camera is just to the side of logistics combined transport flat tray;
Described thermal current air outlet is blown into constant speed thermal current by external fan blower, and constant speed thermal current upwards runs through logistics combined transport flat tray;
Inspection damage process concrete steps comprise:
Step 1.1, pallet enter detection zone; When logistics combined transport flat tray to be transported to by transport tape thermal camera just to position after, transport tape stops;
Step 1.2, be blown into constant speed thermal current; Upwards run through logistics combined transport flat tray, the physical construction of logistics combined transport flat tray side makes constant speed thermal current, in edge, air-flow turbulence occur, local location generation thermal field non-uniform phenomenon, the exception of abnormal hot localised points corresponding logistics combined transport flat tray lateral mechanical structure;
Step 1.3, thermal camera are taken; The side temperature-sensitive picture of shooting logistics combined transport flat tray, for abnormal hot spots analysis;
Step 1.4, stopping air-out; Thermal current air outlet stops air-out;
Step 1.5, pallet shift out detection zone; Logistics combined transport flat tray takes away and detects position by transport tape;
Step 1.6, detection zone are recovered; Ambient temperature fast quick-recovery in detection zone is normal, for next logistics combined transport flat tray inspection harm prepares;
Step 1.7, thermal camera abnormal hot spots detect;
The concrete steps of described thermal camera abnormal hot spots detection method comprise:
Step 2.1: binaryzation; A selected heat degree threshold, the pixel being greater than this threshold value is focus, otherwise is non-focus, is distinguished the hot spot region of logistics combined transport flat tray side heat sensitive image from background;
Step 2.2: the Morphological scale-space of image; Erosion operator, Expanded Operators is repeatedly used to carry out Morphological scale-space to hot spot region successively;
Step 2.3: hot spot region is numbered; 4 connected domain algorithms are adopted to be numbered each hot spot region split;
Step 2.4: hot spot region abnormality detection; Compare with the hot spot region of normal logistics combined transport flat tray side heat sensitive image, calculate absolute difference total value by pixel, be greater than some threshold values, think that this hot spot region and normal hot spot region difference are comparatively greatly, exist physical construction abnormal conditions; Otherwise, think that the physical construction of this hot spot region belongs to normal condition;
Step 2.5: the abnormal scoring of focus; Mark to focus is abnormal according to the absolute difference total value calculated in step 2.4, the larger description architecture of revaluate is abnormal more serious, otherwise textural anomaly is more not serious.
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