CN212674673U - Anti-deformation test monitoring device for anti-glare panel under multi-cycle loading and unloading - Google Patents
Anti-deformation test monitoring device for anti-glare panel under multi-cycle loading and unloading Download PDFInfo
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- CN212674673U CN212674673U CN202021872799.0U CN202021872799U CN212674673U CN 212674673 U CN212674673 U CN 212674673U CN 202021872799 U CN202021872799 U CN 202021872799U CN 212674673 U CN212674673 U CN 212674673U
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Abstract
The utility model belongs to the technical field of the road traffic facility is experimental, a multicycle adds experimental monitoring devices of anti-dazzle board resistance to deformation under uninstallation is disclosed, and this experimental monitoring devices mainly comprises proof box, anti-dazzle board fixed cell, load loading unit and resistance to deformation detecting element. The utility model utilizes the electro-hydraulic servo linear actuator to carry out multi-cycle loading and unloading on the anti-dazzle plate, and simulates the influence of pulsating wind load on the wind resistance of the anti-dazzle plate; compared with a projection detection method, the method for measuring the deformation resistance of the anti-dazzle plate by using a microwave radar improves the test precision; the temperature and the humidity of the test environment are controlled in the test box, so that the test environment is closer to a real application scene.
Description
Technical Field
The utility model belongs to the technical field of the road traffic facility is experimental, concretely relates to multicycle anti-dazzle board resistance to deformation test monitoring devices under loading and unloading.
Background
The anti-dazzle board for expressway is a kind of traffic safety equipment installed in central separation band to eliminate the glare of opposite car light, and China is the country using anti-dazzle board most all over the world. The antiglare sheet is of various specifications and kinds. According to the forming process, the method comprises glass fiber reinforced plastic compression molding, glass fiber reinforced plastic extrusion molding, plastic rotational molding, plastic blow molding, plastic injection molding, plastic extrusion molding and the like; in terms of size distribution, the height is from 700 to 1100 mm, the width is from 140 to 290 mm, the thickness is from 3 to 70 mm, and other specifications are available; there are also many kinds of materials, such as SMC glass fiber reinforced plastics, DMC glass fiber reinforced plastics, high density polyethylene HDPE, polyvinyl chloride PVC, resin ABS, etc. In appearance, common ones include a common straight plate, an inverse S-shape, an imitated relief antiglare shield, a highway landscape antiglare shield, and the like.
The overall mechanical performance is a key index of the anti-dazzle plate for the expressway, the key index comprises wind load resistance and deformation resistance, and the key index is to accurately test the true value of the anti-dazzle plate. The existing national standard of the anti-dazzle plate (GB/T24718-2009) detects the deformation resistance of the anti-dazzle plate after being stressed, and the deformation resistance is calculated by measuring the projection difference (S1-S0) between the top end of the anti-dazzle plate and the plane of an operation table before and after a test and dividing the projection difference by the height of the anti-dazzle plate.
At present, the following test methods are mainly adopted when the deformation resistance of the anti-dazzle plate is detected: the bottom of the anti-dazzle plate is fixed on a test bed, the middle part of the plate is clamped by a standard clamp, the middle point of the standard clamp is taken as a mechanical traction point, a rigid connecting medium is firmly connected with a traction system of a mechanical testing machine through a fixed pulley, the traction point and the lower edge of the fixed pulley are on the same straight line, and the traction direction is perpendicular to the anti-dazzle plateAnd (5) board surface. Projection S of upper end of marking plate to operating table plane0Starting the tester, drawing at 15mm/min, stopping drawing when the drawing load reaches the wind-resistant load of corresponding specification, unloading the applied load to recover the free elasticity of the antiglare shield, and projecting the upper end of the antiglare shield to the plane of the operating table after 5min, wherein the projection is marked as S1The antiglare shield deformation resistance R can be represented by the following formula:
R＝(S1 -S0)/H
in the formula: r- - -anti-dazzle board anti-deformation with unit of millimeter per meter (mm/m)
S1 -S0-end projection point S1Relative to the initial projection point S0In millimeters (mm)
H- - -the height of the anti-dazzle board is in meters (m).
According to the anti-deformation detection method for the anti-dazzle plate, due to the fact that the projection detection method is rough, the anti-deformation detection accuracy of the anti-dazzle plate is low due to human errors and tool errors; secondly, when the anti-deformation of the anti-dazzle plate is measured, the influence of pulsating wind load on the wind resistance of the anti-dazzle plate structure of the highway cannot be simulated, and the result can overestimate the wind resistance of the anti-dazzle plate; meanwhile, the temperature and humidity environment of the anti-dazzle plate in the laboratory is not suitable for accurate control.
A dazzle prevention plate deformation resistance detection device with patent number 201921105123.6, which is characterized by comprising a support means for supporting the dazzle prevention plate, a deformation means for deforming the dazzle prevention plate, and a detection means for detecting the deformation resistance of the dazzle prevention plate; the supporting unit comprises a test bed (4), the test bed (4) is fixedly arranged on the ground, and an anti-dazzle plate (5) perpendicular to the test bed is arranged at the top of the test bed (4); the detection unit comprises a vertical ruler (9), a transverse ruler (10) and a fixed column (12); the fixed column (12) is fixed on the test bed (4) through a ruler seat (13); the vertical ruler (9) is arranged on the side surface of the fixed column (12) and is vertically fixed on the test bed (4) together with the fixed column (12); the transverse ruler is arranged on the fixing column (12) and is perpendicular to the length direction of the vertical ruler, and the transverse ruler (10) is arranged right above the anti-dazzle plate (5). The patent uses a horizontal ruler and a vertical ruler to measure readings, and also needs manual operation of the horizontal ruler and the vertical ruler; secondly, the patent unidirectionally pulls the tested sample through an electronic tensile machine, and can not simulate the influence of pulsating wind load on the antiglare shield.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the following problems of the existing anti-deformation detection method of the anti-dazzle plate, firstly, the anti-deformation detection precision of the anti-dazzle plate is low due to human errors and tool errors; secondly, when the anti-deformation of the anti-dazzle plate is measured, the influence of pulsating wind load on the wind resistance of the anti-dazzle plate structure of the highway cannot be simulated, and the result can overestimate the wind resistance of the anti-dazzle plate; thirdly, the temperature and humidity environment of the anti-dazzle plate in the laboratory is not suitable for accurate control. The utility model provides a multicycle adds experimental monitoring devices of anti-dazzle board resistance to deformation under uninstallation can effectively solve above-mentioned problem.
A monitoring device for an anti-deformation test of an anti-dazzle plate under multi-cycle loading and unloading is characterized by comprising a test box, an anti-dazzle plate fixing unit, a load loading unit and an anti-deformation detection unit; the anti-dazzle plate fixing unit, the load loading unit and the deformation resistance detection unit are all arranged in the test box, the anti-dazzle plate fixing unit comprises a test stand 1, the test stand is fixedly arranged on the ground, and an anti-dazzle plate 11 which is vertically arranged is fixedly arranged on the test stand; the load loading unit comprises a standard clamp 2, an electro-hydraulic servo linear actuator 3, an electro-hydraulic servo loading test control system and a test wall 4, wherein the electro-hydraulic servo loading test control system is integrally connected with the electro-hydraulic servo linear actuator and is installed on the test wall, the standard clamp is clamped at the middle position of the anti-dazzle plate, the standard clamp is connected with the electro-hydraulic servo linear actuator 3 through a traction wire 5, the traction point of the traction wire on the standard clamp 2 and the electro-hydraulic servo linear actuator 3 are on the same horizontal straight line, and the traction direction of the traction wire pulling the standard clamp is perpendicular to the plate surface of the anti-dazzle plate;
resistance to deformation detecting element includes liftable tripod 6, microwave radar 7, wireless data acquisition device and operation terminal, liftable tripod 6 is fixed in ground, liftable tripod top fixed mounting microwave radar, the microwave direction of microwave radar transmission with the antiglare shield direction is perpendicular, and the signal output part and the input of wireless data acquisition device of microwave radar are connected, wireless data acquisition device's output and operation terminal pass through wireless connection.
The utility model discloses in, proof box bottom fixed mounting is subaerial, installs temperature sensor and humidity transducer in the proof box.
The utility model discloses in, the bottom of test bench is through first rag bolt fixed mounting in ground.
The utility model discloses in, proof box bottom is through second rag bolt fixed mounting in ground.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model adopts microwave radar to measure the anti-deformation of the anti-dazzle plate, adopts a non-contact mode, and can effectively avoid the artificial interference error in the test and improve the anti-deformation detection precision of the anti-dazzle plate compared with a projection detection method; secondly, displacement change can be acquired at high frequency for the displacement of the test point of the anti-dazzle plate, the displacement change value of the anti-dazzle plate can be monitored in real time, and the dynamic monitoring frequency is high, convenient and visual;
the utility model adopts the test box, and the temperature sensor and the humidity sensor are arranged in the test box, so that the anti-deformation test of the anti-dazzle plate can be ensured to be in the standard temperature and humidity environment;
three, the utility model discloses utilize electric liquid servo linear actuator to carry out multicycle to the antiglare shield and add the uninstallation, simulation pulsating wind load is to the influence of antiglare shield wind resistance performance, compares the loading mode of standardizing the standard, and electric liquid servo linear actuator can directly simulate pulsating wind load to the influence of antiglare shield wind resistance performance.
Drawings
FIG. 1 is a schematic view illustrating the deformation resistance detection of the dazzle prevention plate;
FIG. 2 is a schematic structural view of the anti-deformation testing and monitoring device for the anti-glare shield under multi-cycle loading and unloading of the present invention;
FIG. 3 is a side view of a metallic foil at a test point at the top of the antiglare shield;
FIG. 4 is a front view of a metallic foil at a top test point of an antiglare shield;
FIG. 5 is a diagram showing the deformation-resistant multi-cycle loading and unloading pattern of the antiglare shield;
the reference signs are: the device comprises a test bench 1, a standard clamp 2, an electro-hydraulic servo linear actuator 3, a test wall 4, a traction wire 5, a liftable tripod 6, a microwave radar 7, a test box 8, a temperature sensor 9, a humidity sensor 10, an anti-dazzle plate 11 and a metal sheet 12.
Detailed Description
The present invention will be further described with reference to the following examples, which are only some, but not all, of the examples of the present invention. Based on the embodiments in the present invention, other embodiments used by a person skilled in the art without creative labor all belong to the protection scope of the present invention.
With reference to the attached drawings, the utility model discloses a monitoring device for anti-deformation tests of an anti-glare shield under multi-cycle loading and unloading, which is characterized by comprising a test box, an anti-glare shield fixing unit, a load loading unit and an anti-deformation detection unit; the anti-dazzle plate fixing unit, the load loading unit and the deformation resistance detection unit are all installed in the test box, and the bottom of the test box is fixedly installed on the ground through the second foundation bolt. The anti-dazzle plate fixing unit comprises a test bed 1, the bottom of the test bed is fixedly installed on the ground through a first foundation bolt, and an anti-dazzle plate 11 which is vertically arranged is fixedly installed on the test bed. The load loading unit comprises a standard clamp 2, an electro-hydraulic servo linear actuator 3, an electro-hydraulic servo loading test control system and a test wall 4. The load loading unit is used for applying multi-cycle loading and unloading, namely simulating fluctuating wind load, to the antiglare shield. The electro-hydraulic servo loading test control system is connected with the electro-hydraulic servo linear actuator in an integrated mode and is installed on a test wall. The standard clamp is clamped at the middle position of the anti-dazzle plate and is connected with the electro-hydraulic servo linear actuator 3 through a traction wire 5, the traction point of the standard clamp 2 by the traction wire 5 and the electro-hydraulic servo linear actuator 3 are on the same horizontal straight line, and the traction direction of the traction wire for pulling the standard clamp is perpendicular to the plate surface of the anti-dazzle plate. Resistance to deformation detecting element includes liftable tripod 6, microwave radar 7, wireless data acquisition device and operation terminal, liftable tripod 6 is fixed in ground, liftable tripod top fixed mounting microwave radar, and the microwave direction of microwave radar transmission is perpendicular with the antiglare shield direction, and the signal output part and the input of wireless data acquisition device of microwave radar are connected, wireless data acquisition device's output and operation terminal pass through wireless connection. The operation terminal can be a mobile phone or a tablet computer or a desktop computer. A temperature sensor 9 and a humidity sensor 10 are installed at the top inside the test box, and the temperature and the humidity of the test are simulated in the test box, so that the anti-deformation test of the anti-dazzle plate is ensured to be in a standard temperature and humidity environment.
The method for detecting the deformation resistance of the anti-dazzle plate by using the anti-deformation test monitoring device under multi-cycle loading and unloading comprises the following steps of:
the method comprises the following steps: placing the anti-dazzle plate in a test box, and adjusting the temperature and humidity in the test box to ensure that the test conditions are in the specified requirements;
step two: the top of the test bed is fixedly provided with a vertical antiglare shield to be detected; the method comprises the following steps that a standard clamp is fixedly clamped in the middle of an anti-dazzle plate to be detected, one end of an electro-hydraulic servo linear actuator is connected with the standard clamp through a traction wire, the other end of the electro-hydraulic servo linear actuator is fixed to a test wall, and the direction of tension generated by the electro-hydraulic servo linear actuator is perpendicular to the plate surface of the anti-dazzle plate;
step three: adjusting the pitching angle of the microwave radar, and further adjusting the pitching angle of the microwave emitted by the microwave radar so that the microwave radar is aligned to the test point position of the anti-dazzle plate;
step four: sticking a metal sheet at the position of the top surface test point of the anti-dazzle plate;
step five: under the condition that the electro-hydraulic servo linear actuator is not started, the anti-dazzle plate is kept in an unstressed state; at the moment, the microwave radar is started to measure and read the reading, and the reading is recorded as Z0；
Step six: control system for starting electro-hydraulic servo loading testAnd firstly pulling the standard clamp by the electro-hydraulic servo linear actuator at the speed of 15mm/min, stopping pulling when the pulling load reaches the wind load required by the test, then unloading the pulling load applied to the standard clamp at the speed of 30mm/min, and stabilizing for 1min to recover the free elasticity of the antiglare plate. Taking the process as a loading and unloading cycle, continuously applying 10 loading and unloading cycles, recovering the free elasticity of the antiglare shield for 5min, and measuring test point data by a microwave radar, and recording the data as Z1(ii) a During the test, the wind resistance load F is not less than the product of C and S, wherein C is a wind resistance load constant and takes the value of 1647.5N/m2And S is the effective wind bearing area of the anti-dazzle plate with the specification. The deformation resistance R is less than or equal to 10 mm/m
Step seven: the antiglare shield resistance to deformation is obtained according to the following formula:
R＝(Z1-Z0 ) [ formula ]/H, wherein: r is the anti-deformation capacity of the anti-dazzle plate and has the unit of mm/m and Z1-Z0The displacement of a test point on the antiglare shield is in mm; h is the height of the antiglare shield, and the unit is m.
Claims (4)
1. A monitoring device for an anti-deformation test of an anti-dazzle plate under multi-cycle loading and unloading is characterized by comprising a test box, an anti-dazzle plate fixing unit, a load loading unit and an anti-deformation detection unit; the anti-dazzle plate fixing unit, the load loading unit and the deformation resistance detection unit are all arranged in the test box, the anti-dazzle plate fixing unit comprises a test stand (1), the test stand is fixedly arranged on the ground, and an anti-dazzle plate (11) which is vertically arranged is fixedly arranged on the test stand; the load loading unit comprises a standard clamp (2), an electro-hydraulic servo linear actuator (3), an electro-hydraulic servo loading test control system and a test wall (4), wherein the electro-hydraulic servo loading test control system is integrally connected with the electro-hydraulic servo linear actuator and is installed on the test wall, the standard clamp is clamped at the middle position of the anti-dazzle plate, the standard clamp is connected with the electro-hydraulic servo linear actuator (3) through a traction wire (5), the traction wire is positioned on the same horizontal straight line of the traction point of the standard clamp (2) and the electro-hydraulic servo linear actuator (3), and the traction direction of the standard clamp pulled by the traction wire is perpendicular to the plate surface of the anti-dazzle plate;
the anti-deformation detection unit comprises a liftable tripod (6), a microwave radar (7), a wireless data acquisition device and an operation terminal, wherein the liftable tripod (6) is fixed on the ground, the microwave radar is fixedly installed at the top of the liftable tripod, the microwave direction transmitted by the microwave radar is perpendicular to the direction of the anti-dazzle plate, the signal output end of the microwave radar is connected with the input end of the wireless data acquisition device, and the output end of the wireless data acquisition device is wirelessly connected with the operation terminal.
2. The monitoring device for the tests of the resistance to deformation of the dazzle prevention plate under multi-cycle loading and unloading according to claim 1, wherein the bottom of the test chamber is fixedly installed on the ground, and a temperature sensor and a humidity sensor are installed in the test chamber.
3. The monitoring device for the tests of the resistance to deformation of the dazzle prevention plate under multi-cycle loading and unloading according to claim 2, wherein the bottom of the test box is fixedly installed on the ground by a second anchor bolt.
4. The apparatus for monitoring the multi-cycle loading and unloading antiglare shield against deformation test of claim 1, wherein the bottom of the test bed is fixedly mounted to the ground by a first anchor bolt.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111999182A (en) * | 2020-09-01 | 2020-11-27 | 四川华腾公路试验检测有限责任公司 | Anti-deformation test monitoring device and method for anti-glare panel under multi-cycle loading and unloading |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111999182A (en) * | 2020-09-01 | 2020-11-27 | 四川华腾公路试验检测有限责任公司 | Anti-deformation test monitoring device and method for anti-glare panel under multi-cycle loading and unloading |
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