CN113884774A - Device and method for continuously testing electromagnetic wave reflection performance of electromagnetic shielding clothes - Google Patents
Device and method for continuously testing electromagnetic wave reflection performance of electromagnetic shielding clothes Download PDFInfo
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- CN113884774A CN113884774A CN202111008300.0A CN202111008300A CN113884774A CN 113884774 A CN113884774 A CN 113884774A CN 202111008300 A CN202111008300 A CN 202111008300A CN 113884774 A CN113884774 A CN 113884774A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
- G01R29/0835—Testing shielding, e.g. for efficiency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
- G01R29/0821—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning rooms and test sites therefor, e.g. anechoic chambers, open field sites or TEM cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
Abstract
The invention discloses a device for continuously testing the electromagnetic wave reflection performance of electromagnetic shielding clothes, which comprises a surrounding rotating device arranged in a darkroom and a double-power disc device arranged outside the darkroom, wherein the surrounding rotating device is in transmission connection with the double-power disc device, the double-power disc device drives the surrounding rotating device to rotate, the electromagnetic shielding clothes to be tested are arranged at a rotating center in the middle of the surrounding rotating device through a mannequin, the surrounding rotating device is also provided with a signal receiving device, the surrounding rotating device drives the signal receiving device to rotate around the mannequin, a signal transmitting system is also arranged in the darkroom, and the double-power disc device is also connected with the signal receiving device through a traction rope. The invention can realize the performance test of the electromagnetic wave reflected by the electromagnetic shielding clothes and can scientifically and reasonably test the electromagnetic field distribution condition of different positions of the surrounding environment after the electromagnetic wave is reflected by the clothes. The invention also discloses a method for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes.
Description
Technical Field
The invention belongs to the technical field of testing in the field of clothes, relates to a device for continuously testing the electromagnetic wave reflection performance of electromagnetic shielding clothes, and further relates to a method for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes.
Background
The electromagnetic shielding clothes have wide requirements in the fields of national defense and military, aerospace, power and electricity, special industry, medical treatment and the like, have become rigid requirements in a plurality of environments and occasions, and can permanently and effectively protect the human body so as to prevent the human body from being damaged by electromagnetism. However, the electromagnetic shielding clothes still need to solve a series of problems, and especially, secondary electromagnetic pollution to the surrounding environment and the influence thereof caused by wearing the electromagnetic shielding clothes on human bodies are urgently needed to be researched. At present, all researches mainly focus on the protection performance of electromagnetic injury of electromagnetic shielding clothes on the human body, and the influence of the clothes after being worn on the surrounding environment is not discussed. Under the circumstance, the design, production and evaluation of the electromagnetic shielding clothes lack scientific basis, and an effective device and method for testing the performance of reflecting electromagnetic waves when a human body wears the clothes are urgently needed to be established.
Disclosure of Invention
The invention aims to provide a device for continuously testing the electromagnetic wave reflection performance of electromagnetic shielding clothes, which can realize the test of the electromagnetic wave reflection performance of the electromagnetic shielding clothes and can scientifically and reasonably test the electromagnetic field distribution conditions of different positions of the surrounding environment after the electromagnetic waves are reflected by the clothes.
The invention adopts the technical scheme that the device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes comprises a surrounding rotating device arranged in a darkroom and a double-power disc device arranged outside the darkroom, wherein the surrounding rotating device is in transmission connection with the double-power disc device, the double-power disc device drives the surrounding rotating device to rotate, the electromagnetic shielding clothes to be tested are arranged at a rotating center in the middle of the surrounding rotating device through a mannequin, the surrounding rotating device is also provided with a signal receiving device, the surrounding rotating device drives the signal receiving device to rotate around the mannequin, a signal transmitting system is also arranged in the darkroom, and the double-power disc device is also connected with the signal receiving device through a traction rope.
The present invention is also characterized in that,
the encircling rotating device comprises a hollow shaft ring, a support is installed in the hollow middle of the hollow shaft ring, a mannequin is fixed on the support, a plurality of spokes are uniformly arranged on the side wall of the hollow shaft ring around the side wall of the hollow shaft ring, the other ends of the spokes are connected with an annular rail together, the signal receiving device is fixedly arranged on the upper surface of the annular rail, a crawler belt is arranged on the annular rail in a surrounding manner, and the crawler belt penetrates through a darkroom after passing through the annular rail and is sleeved on the double-power disc device.
Double dynamical dish device includes the support axle, support axle upper portion cover is equipped with the pivot, the cover is equipped with the main disc in the pivot, support axle upper end is located the fixed high auxiliary dish that is provided with in main disc top, the main disc and high auxiliary dish are all carved with the scale, the track cover is on the main disc, be provided with the rope handling device on the high auxiliary dish, for rod-shaped structure, the centre is provided with horizontal stringing hole, the rope handling device top still is provided with the rope pressing bolt, the rope pressing bolt extends to stringing hole department, still be provided with the ropewinder on the high auxiliary dish, the one end winding of haulage rope is on the ropewinder, the other end passes behind the stringing hole of rope handling device and is connected with signal receiving arrangement, be provided with the handle on the ropewinder.
The signal receiving device comprises a signal receiver, the signal receiver is connected with a vertical supporting frame, the other end of the vertical supporting frame is fixedly connected with a transverse supporting frame, the signal receiving device further comprises a stand column, a sawtooth slideway is arranged in the stand column along the height direction of the stand column, a sliding block capable of being clamped in a telescopic manner is arranged in the sawtooth slideway, a bracket shaft is arranged at the bottom of the sliding block, a hollow middle shaft extending along the height direction of the vertical shaft is arranged in the middle of the stand column, the sliding block sleeve is arranged on the hollow middle shaft, the upper end of the hollow middle shaft extends out of the top of the stand column and is connected with a traction ring, symmetrical notches are arranged on two side walls corresponding to the hollow middle shaft, the bracket shaft penetrates through the hollow middle shaft through the notches, a traction rope penetrates through the hollow middle shaft of the traction ring and is downwards connected to the bracket shaft penetrating through the hollow middle shaft, at least one side wall of the sliding block is provided with a side convex plate, and the other end of the transverse supporting frame is connected to the side convex plate.
The two sides of the inside of the upright post are symmetrically provided with sawtooth slideways, the tooth shapes of the sawtooth slideways are of right-angled triangle structures, one side of each right-angled side faces upwards and is fixed on the inner wall of the upright post, the sawtooth slideways on the two sides are positioned at the upper end of the upright post to form a slideway upper part tongue pressing area, and the width of the slideway upper part tongue pressing area is consistent with that of the sliding block.
A hollow cylinder is arranged on the slider along the height direction, the inner diameter of the hollow cylinder is matched with the outer diameter of the hollow center shaft, the slider is sleeved on the hollow center shaft through the hollow cylinder, springs are fixedly connected to two sides of the hollow cylinder corresponding to the sawtooth slideways at the lower part in the slider, the other end of each spring is connected with a positioning tongue, the other end of each positioning tongue can extend out of the side wall of the slider at the corresponding side, one side of each positioning tongue extending out of the side wall of the slider is provided with an inclined surface and matched with the tooth-shaped inclined surface of the sawtooth slideways, locking plates corresponding to the positioning tongues are further arranged on two sides of the hollow cylinder above the positioning tongues in the slider, lower clamping blocks and upper clamping blocks are respectively arranged on the upper surfaces of the positioning tongues and the lower surfaces of the locking plates, when the slider moves to a tongue pressing area at the upper parts of the slideways, the positioning tongues move inwards until the lower clamping blocks and the upper clamping blocks are mutually clamped, and a reset plate vertical to the locking plates is further arranged at one end of the locking plates far away from the hollow cylinder, reset plate hits the pinhole, and the stand bottom corresponds the position that reset plate hit the pinhole and is provided with the firing pin.
The positioning tongue is also provided with a fixing ring.
The lower fixture block and the upper fixture block are made of flexible wear-resistant materials, the shapes of the lower fixture block and the upper fixture block are straight surfaces on one side of an inclined surface, the inclined surfaces of the lower fixture block and the upper fixture block are opposite, and when relative movement occurs, the inclined surfaces of the lower fixture block and the upper fixture block deform and pass through each other and are blocked by the straight surfaces, so that locking and buckling actions are completed.
The annular rail upper surface is provided with the recess, and the stand is fixed in the recess, and annular rail and main disc lateral wall all position have the track recess, and the track is through the belt drive of realizing annular rail and main disc in the recess of annular rail and main disc of cover, is provided with track clearing hole and haulage rope clearing hole on the wall of darkroom, and track and haulage rope pass the wall of darkroom through track clearing hole and haulage rope clearing hole respectively.
The invention adopts another scheme that the method for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes adopts the device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes, and is implemented according to the following steps:
step 4, starting a signal transmitting system, sequentially rotating the main disc to the annular position of each test point recorded in the step 2, sequentially adjusting the sliding block to the height consistent with the test point in the step 2 at the position, and sequentially collecting and storing electromagnetic field intensity signals of the signal receiver at different positions and different heights;
step 6, setting the size of a new annular rail, repeating the steps 1-5, and continuously testing the reflectivity of the electromagnetic waves at other positions when the electromagnetic waves are reflected by the electromagnetic shielding clothes;
and 7, changing the frequency and the position of the emission source, repeating the steps 1-6, and testing the reflection condition of the electromagnetic shielding clothes on the electromagnetic waves when different parameters are changed.
The invention has the beneficial effects that:
compared with the existing electromagnetic shielding garment testing technology, the invention firstly provides the device and the method for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding garment, the reflection performance of the electromagnetic shielding garment can be continuously tested in a dark room with a 3 m method, and the problem that the electromagnetic wave reflection performance of the electromagnetic shielding garment is not tested by an effective method at present is solved; the method for accurately controlling the horizontal position and the vertical position of the signal receiver through the ingenious matching of the devices such as the sliding block, the annular rail and the power disc is established for the first time, and each device is reasonably arranged inside and outside the darkroom, so that the electromagnetic interference and the electromagnetic leakage are effectively prevented even if the operation is facilitated, and the accuracy and the scientificity of the test are ensured. The invention promotes the development of the electromagnetic shielding clothes testing method, lays a foundation for researching the electromagnetic wave reflecting performance of the electromagnetic shielding clothes, provides a basis for scientifically evaluating the electromagnetic influence of the electromagnetic shielding clothes on the surrounding environment, and has important effects on the design, production, evaluation, popularization and application of the electromagnetic shielding clothes.
Drawings
Fig. 1 is an overall schematic diagram of an apparatus for continuously testing electromagnetic wave reflection performance of an electromagnetic shielding garment according to the present invention.
Fig. 2 is a detailed schematic diagram of a dual-power disc device in a device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes.
Fig. 3 is a detailed schematic diagram of a signal receiving device in the device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding garment of the invention.
Fig. 4 is a schematic cross-sectional view of a circular rail in the apparatus for continuously testing electromagnetic wave reflection performance of an electromagnetic shielding garment according to the present invention.
Fig. 5 is a schematic top view of a slider in the apparatus for continuously testing electromagnetic wave reflection performance of an electromagnetic shielding garment of the present invention.
Fig. 6 is a schematic diagram of key components on the side surface of a slider in the apparatus for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding garment of the invention.
Fig. 7 is a schematic view of a slider in the apparatus for continuously testing electromagnetic wave reflection performance of an electromagnetic shielding garment according to the present invention.
In the figure, 1, a darkroom, 2, a mannequin, 3, a pillar, 4, a hollow shaft ring, 5, a ring rail, 6, a spoke, 7, a track, 8, a signal receiving device, 9, a main disc, 10, a height auxiliary disc, 11, a traction rope, 12, a signal receiver, 13, a vertical support frame, 14, a transverse support frame, 15, a stand column, 16, a slide block, 17, a sawtooth slide way, 18, a positioning tongue, 19, a slide way upper tongue pressing area, 20, a striker, 21, a signal transmitting system, 22, a microwave cable, 23, a track through hole, 24, a traction rope through hole, 25, a groove, 26, a track groove, 27, a rope penetrating device, 28, a rope penetrating hole, 29, a rope rolling device, 30, a rope pressing bolt, 31, a support shaft, 32, a rotating shaft, 33, a side convex plate, 34, a traction ring, 35, a hollow center shaft, 36, 37, a support shaft, 38, a hollow cylinder, 39, a spring, 40. the lock catch plate, 41, the reset plate, 42, the fixing ring, 43, the lower clamping block, 44, the upper clamping block and 45, the reset plate knock the pinhole.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a device for continuously testing the electromagnetic wave reflection performance of electromagnetic shielding clothes, which is structurally shown in figure 1 and comprises a surrounding rotating device arranged in a darkroom 1 and a double-power disk device arranged outside the darkroom 1, wherein the surrounding rotating device is in transmission connection with the double-power disk device, the double-power disk device drives the surrounding rotating device to rotate, the electromagnetic shielding clothes to be tested are arranged at the rotating center in the middle of the surrounding rotating device through a mannequin 2, a signal receiving device 8 is also arranged on the surrounding rotating device, the surrounding rotating device drives the signal receiving device 8 to rotate around the mannequin 2, a signal transmitting system 21 is also arranged in the darkroom 1, and the double-power disk device is also connected with the signal receiving device 8 through a traction rope 11.
Encircle rotating device and include hollow shaft circle 4, install pillar 3 in the middle of hollow shaft circle 4, fixed manikin 2 on the pillar 3, evenly be provided with a plurality of spokes 6 around its lateral wall on the 4 lateral walls of hollow shaft circle, 6 other ends of a plurality of spokes are connected with annular rail 5 jointly, signal reception device 8 is fixed to be set up at annular rail 5 upper surface, around being equipped with track 7 on annular rail 5, track 7 passes darkroom 1 cover on dual-power dish device after winding annular rail 5.
As shown in fig. 2, the dual-power disc device includes a support shaft 31, a rotating shaft 32 is sleeved on the upper portion of the support shaft 31, a main disc 9 is sleeved on the rotating shaft 32, a height auxiliary disc 10 is fixedly arranged on the upper portion of the support shaft 31 above the main disc 9, scales are engraved on the main disc 9 and the height auxiliary disc 10, a caterpillar band 7 is sleeved on the main disc 9, a rope threading device 27 is arranged on the height auxiliary disc 10 and is of a rod-shaped structure, a transverse rope threading hole 28 is arranged in the middle of the height auxiliary disc, a rope pressing bolt 30 is further arranged on the top of the rope threading device 27, the rope pressing bolt 30 extends to the rope threading hole 28 and can move down and press the traction rope through a rotating or spring pressing mechanism, a rope winder 29 is further arranged on the height auxiliary disc 10, one end of the traction rope 11 is wound on the rope winder 29, the other end of the traction rope winder 29 penetrates through the rope threading hole 28 of the rope threading device 27 and then is connected with a dynamic signal receiving device 8, and a handle is arranged on the rope winder 29.
As shown in fig. 3-7, the signal receiving device 8 includes a signal receiver 12, the signal receiver 12 is connected with a vertical support frame 13, the other end of the vertical support frame 13 is fixedly connected with a horizontal support frame 14, the signal receiving device further includes a vertical column 15, a sawtooth slideway 17 is arranged in the vertical column 15 along the height direction thereof, a sliding block 16 capable of being telescopically clamped is arranged in the sawtooth slideway 17, a bracket shaft 37 is arranged at the bottom of the sliding block 16, a hollow central shaft 35 extending along the height direction thereof is arranged in the middle of the vertical column 15, the sliding block 16 is sleeved on the hollow central shaft 35, the upper end of the hollow central shaft 35 extends out of the top of the vertical column 15 and is connected with a traction ring 34, symmetrical notches 36 are arranged on two corresponding side walls of the hollow central shaft 35, the bracket shaft 37 penetrates through the hollow central shaft 35 through the notch 36, the traction rope 11 penetrates through the traction ring 34 and is downwardly connected to the bracket shaft 37 penetrating through the hollow central shaft 35, at least one side wall of the sliding block 16 is provided with a side convex plate 33, and the other end of the transverse supporting frame 14 is connected to the side convex plate 33.
Sawtooth slideways 17 are symmetrically arranged on two sides inside the upright post 15, the tooth form of the sawtooth slideways 17 is a right-angled triangle structure, one side of each right-angled side faces upwards and is fixed on the inner wall of the upright post, the sawtooth slideways 17 on the two sides are positioned at the upper end of the upright post 15 to form a slideway upper part tongue pressing area 19, and the width of the slideway upper part tongue pressing area 19 is consistent with that of the sliding block 16.
A hollow cylinder 38 is arranged on the upper inner edge of the sliding block 16 along the height direction thereof, the inner diameter of the hollow cylinder 38 is adapted to the outer diameter of the hollow center shaft 35, the sliding block 16 is sleeved on the hollow center shaft 35 through the hollow cylinder 38, springs 39 are fixedly connected to both sides of the hollow cylinder 38 corresponding to the sawtooth slide ways 17 at the inner lower part of the sliding block 16, the other end of each spring 39 is connected with a positioning tongue 18, the other end of each positioning tongue 18 can extend out of the side wall of the sliding block 16 at the corresponding side, one side surface of each positioning tongue 18 extending out of the side wall of the sliding block 16 is provided with an inclined surface and matched with the toothed inclined surface of the sawtooth slide way 17, both sides of the hollow cylinder 38 above the positioning tongue 18 in the sliding block 16 are also provided with locking plates 40 corresponding to the positioning tongues 18, the upper surfaces of the positioning tongues 18 and the lower surfaces of the locking plates 40 are respectively provided with lower clamping blocks 43 and upper clamping blocks 44, when the sliding block 16 moves to the tongue pressing area 19 at the upper part of the slide way, the positioning tongues 18 move inwards until the lower clamping blocks 43 and the upper clamping blocks 44 are mutually clamped, the end of the latch plate 40 far away from the hollow cylinder 38 is further provided with a reset plate 41 perpendicular to the latch plate 40, two ends of the reset plate 41 are provided with reset plate striker holes 45, and the bottom of the upright post 15 is provided with strikers 20 corresponding to the positions of the reset plate striker holes 45.
The positioning tongue 18 is also provided with a fixing ring 42.
The lower fixture block 43 and the upper fixture block 44 are made of flexible wear-resistant materials, the shapes of the materials are that one side of an inclined plane is a straight plane, the inclined planes of the lower fixture block 43 and the upper fixture block 44 are opposite, when the relative motion occurs, the inclined planes of the lower fixture block 43 and the upper fixture block 44 deform and pass through each other, and the straight plane blocks the inclined planes, so that the locking action is completed.
The upper surface of the annular rail 5 is provided with a groove 25, the upright post 15 is fixed in the groove 25, the side walls of the annular rail 5 and the main disc 9 are provided with crawler grooves 26, the crawler 7 is sleeved in the grooves 26 of the annular rail 5 and the main disc 9 to realize belt transmission of the annular rail 5 and the main disc 9, the wall of the darkroom 1 is provided with crawler through holes 23 and hauling rope through holes 24, and the crawler 7 and the hauling rope 11 respectively pass through the wall of the darkroom 1 through the crawler through holes 23 and the hauling rope through holes 24.
The invention adopts another scheme that the method for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes adopts the device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes, and is implemented according to the following steps:
step 4, starting a signal transmitting system 21, sequentially rotating the main disc to the annular position of each test point recorded in the step 2, sequentially adjusting the sliding block 16 to the height consistent with the test point in the step 2 at the position, and sequentially collecting and storing electromagnetic field intensity signals of the signal receiver at different positions and different heights;
step 6, setting the size of a new annular rail, repeating the steps 1-5, and continuously testing the reflectivity of the electromagnetic waves at other positions when the electromagnetic waves are reflected by the electromagnetic shielding clothes;
and 7, changing the frequency and the position of the emission source, repeating the steps 1-6, and testing the reflection condition of the electromagnetic shielding clothes on the electromagnetic waves when different parameters are changed.
The working principle of each part of the device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes is as follows:
the surrounding rotating device is a system with variable radius and capable of rotating around the mannequin in an annular mode and is arranged in a darkroom 1 which comprises a full anechoic chamber and a half anechoic chamber. The device is installed by taking a manikin 2 and a support 3 as central shafts according to test requirements, and consists of a hollow shaft ring 4, an annular rail 5, spokes 6 and a crawler belt 7, wherein the crawler belt is accurately drawn by a double-power disc outside a darkroom according to scales, so that the hollow shaft ring rotates around the manikin support, and a signal receiving device 8 is driven to rotate around the manikin to acquire signals.
The surrounding rotating device can drive the signal receiving device to rotate around the mannequin in an annular mode, all parts of the signal receiving device are made of materials transparent to electromagnetic waves, such as high polymer materials such as plastics and wood, the size specification of the signal receiving device is arbitrary, and the signal receiving device is matched with the specification and the size of a darkroom and meets the testing requirement. Consists of a hollow shaft ring, an annular rail, spokes and a crawler. The hollow shaft collar is matched with the human model support column in size to achieve smooth meshing, and rotatable plastic beads or small smooth wheels are embedded below the shaft collar to ensure that the surrounding rail can stably and easily rotate around the mannequin support column. The upper part of the annular rail is embedded with a groove 25 which can be in the shape of a rectangular or round section and the like, a built-in nut or other fixing devices are arranged on the groove, the upright post of the signal receiver bracket can be fixed or clamped in the groove, and the outer side of the annular rail is also provided with a groove 26 for winding the crawler. The annular track is designed with a plurality of radius specifications according to requirements, and all the dimensions are carved on the annular track, so that the accurate position of the receiver along the annular track can be determined. The spokes have a connecting function, and can connect the annular rails with different diameters with the hollow shaft ring by at least 3 spokes. The track twines in the recess of annular rail outside, for materials such as conventional weaving area, rubber, polymer, its inboard has sufficient frictional force, can drive annular rail and rotate and do not skid under the power dish rotates, and the outside is then smooth to easily pass through the micropore on the darkroom.
The double-power disk device comprises a main disk 9 and a height auxiliary disk 10 which are arranged outside a darkroom and can control the signal receiving device to move along the annular direction and the height direction. When the main disc rotates, the caterpillar band is driven to rotate, the surrounding rotating device in the darkroom can be controlled to drive the signal receiving device to rotate, and when the auxiliary disc at the height rotates, the signal receiver 12 in the darkroom can move in the height direction through the traction rope 11. The main disc and the height auxiliary disc are both provided with accurate sizes, and the signal receiving device can be adjusted to a required testing position according to the scales.
The double-power disk device consists of a main disk and a height auxiliary disk which are arranged outside a darkroom. The side surface of the main disc is provided with a groove consistent with the annular rail, and the main disc can drive the crawler belt to rotate, so that the surrounding rotating system is accurately controlled, and the signal receiver moves along the annular track. The height auxiliary disc is designed with a rope threading device 27, the traction rope passes through a rope threading hole 28 and is wound on a rope rolling device 29, and the traction rope can be driven to move through the winding movement of a handle on the rope rolling device so as to control the height of the sliding block. The rope through hole can keep the proper tension of the traction rope when winding or releasing, and the traction rope can be pressed and fixed by the rope pressing bolt 30 at the upper end at any time. The hauling cable is made of flexible materials, such as rubber, textile fiber or filament rope and the like with small elasticity and high strength, and the fineness of the hauling cable is matched with the groove of the height auxiliary disc. The double-power disc is provided with a support shaft 31, the main disc is sleeved on the support shaft through a rotating shaft 32, and the main disc can do annular motion along the support shaft by applying force through a handle so as to drive the crawler belt. The height auxiliary disc is arranged above the main disc and fixed on the support shaft, and the diameter of the height auxiliary disc is smaller than that of the main disc so as not to influence the rotation of a handle of the height auxiliary disc. All the parts of the double-power disc can be made of metal, wood, rigid plastic and other high polymer materials, and the like, and the double-power disc has any size and specification, so that the traction rope and the caterpillar track can be smoothly rotated according to the transmission principle.
The signal receiving device: the signal receiver is placed, so that the signal receiver can be precisely lifted along the height. Comprises a signal receiver 12, a vertical support frame 13, a horizontal support frame 14, a vertical column 15, a slide block 16, a sawtooth slideway 17 and a matched hauling rope. The auxiliary height disk drives the traction rope to enable the intelligent pulley to slide along the sawtooth to move up and down when rotating, the positioning tongue 18 of the sliding block is clamped at an accurate fixed height, when the sliding block reaches the top of the sliding way, the positioning tongue of the sliding block is inwards extruded and clamped through the tongue pressing area 19 on the upper portion of the sliding way, the sliding block can smoothly settle to the bottom of the sliding way, and the positioning tongue is popped out through the firing pin 20, so that the next certain height process can be completed. Other related devices: including mannequins, signal emitting system 21 and darkroom and other related facilities. The mannequin can wear the electromagnetic shielding clothes, and the support of the mannequin is used as a rotating shaft to be matched with the surrounding movement device; the signal transmitting system is precisely placed in a designated position in a darkroom according to the test requirement and is connected with an external vector network analyzer through a microwave cable 22. The semi-anechoic chamber has a size larger than that of the standard 3 m method, and has a sidewall provided with a track passing hole 23 and a pull rope passing hole 24 so that a pull rope, a cable and a track can pass through.
The signal receiving device comprises a receiver, a vertical supporting frame, a transverse supporting frame, a stand column, a sliding block, a sawtooth slideway and a matched traction rope. The signal receiver passes through the screw, buckle, structure such as key round pin and installs on vertical support frame, and vertical support frame passes through screw, buckle and structure such as key round pin and installs on horizontal support frame, and horizontal support frame then passes through screw, buckle and structure such as key round pin and installs on the side flange 33 of slider, and horizontal support frame can be two symmetrical structures, all fixes on the relief block both sides relief block, also can be single structure, only carries out the unilateral at one side relief block and fixes. The lower part of the upright post is fixed on the annular rail, a sawtooth slideway is arranged in the upright post, the tooth form is a right-angled triangle structure, and one side of the right-angled side faces upwards and is fixed on the inner wall of the upright post. The upright post is provided with a traction ring 34, a traction rope passes through the ring and the darkroom micropores to reach the outside of the darkroom and is wound on the height auxiliary disc, and the intelligent pulley can drive the signal receiver to accurately move up and down by pulling or releasing the traction rope. The center of the upright post is provided with a hollow middle shaft 35, and notches 36 are symmetrically arranged from the bottom of the upright post to the top to two sides, so that a bracket shaft 37 of the sliding block can extend out to smoothly drive the sliding block to move up and down on the hollow middle shaft of the upright post. The vertical column is divided into three areas, namely a reset area at the lower end, two firing pins are arranged at the bottom of the vertical column for a reset positioning tongue, a sawtooth area can enable the sliding block to move upwards in a single direction and position the sliding block step by step, and a tongue pressing area at the top of the vertical column is transversely provided with a positioning tongue which can be completely pressed back to the inside of the sliding block, so that the sliding block can freely fall to the reset area along a sawtooth track. All parts of the upright post are made of high polymer materials such as wood, plastic and the like which are transparent to electromagnetic waves, and the size of the upright post is matched with that of the annular rail, so that the upright post is suitable for the movement of the annular rail and the up-and-down movement of the sliding block.
The slide block in the signal receiving device comprises a hollow cylinder 38, a lateral relief printing plate 33, a positioning tongue 18, a spring 39, a locking plate 40, a reset plate 41 and the like. The hollow cylinder is matched with the hollow middle shaft of the upright post in size and can be sleeved into the hollow middle shaft to move up and down. The lateral convex plate can be provided with a signal receiver lateral supporting frame on one side or two sides. The root of the positioning tongue is fixed at the outer end of the hollow cylinder by a spring, and fixing rings 42 are designed at the left side, the right side and the upper part to determine the telescopic position of the positioning tongue and prevent the positioning tongue from swinging up, down, left and right. The positioning tongues are symmetrical, and the structures on the two sides and the matched components in the sliding block are completely consistent. The upper end of the positioning tongue is provided with a lower clamping block 43, an upper clamping block 44 is designed below the lock catch plate, when the slide block moves to the tongue pressing area of the upright post, the positioning tongue moves inwards until the upper clamping block is locked by the lower clamping block of the lock catch plate, when the slide block reaches the reset area, namely the lower end of the upright post, the firing pin strikes the reset plate striking pin holes 45 on two sides of the slide block, the reset plate striking pin holes 45 are blind holes, the lock catch plate connected with the reset plate is lifted upwards, at the moment, the upper clamping block below the lock catch plate is separated from the lower clamping block above the positioning tongue, so that the positioning tongue is reset, and in other positions, when the slide block rises for one sawtooth, the positioning tongue is gradually compressed by the sawtooth inclined plane, and when the sawtooth is crossed, the slide block is kept in a completely extending state, and is fixed at the height position of the sawtooth horizontal line. The fixture blocks are made of flexible wear-resistant materials, such as plastics, composite materials and the like, the fixture blocks are in the shapes of one side inclined plane and one side straight plane, the inclined planes of the two fixture blocks are opposite, when relative motion occurs, the inclined planes of the two fixture blocks deform and pass through each other, and the two fixture blocks are blocked by the straight planes, so that the locking action is completed.
The lower part of the human body model is tested to be provided with a pillar rotating shaft structure, so that the dress form can rotate to test the reflected electromagnetic wave conditions of different regions of the dress. The signal transmitting system is generally placed on a support, can be adjusted to an accurate position according to test requirements, and is connected with an external vector network analyzer through a ground micropore leading-out microwave cable. The semi-anechoic chamber meets the specification of more than 3 m method, and is internally provided with three micropores at one side, one is a traction rope micropore 24 for a traction rope to pass through, and the other is a track micropore 23 for a track to pass through. The size of the micropores is matched with that of the track and the hauling rope, and the inner wall of the micropores is attached with surface smooth media such as wave absorbing coatings, wave absorbing tubes and the like so as to prevent the interference of internal and external electromagnetic waves as much as possible.
The slide block control method comprises the following steps: the sliding block control method completes the processes of shrinkage, locking, descending, resetting, ascending, positioning and the like of the positioning tongue through the control and matching of the three areas. When the traction rope pulls the sliding block to the tongue pressing area of the upright post, the positioning tongue can be accurately pressed into the sliding block due to the narrowing of the transverse dimension of the traction rope, the lower clamping block at the upper part of the positioning tongue is extruded to the other side of the upper clamping block of the locking plate, so that the contraction and locking processes are completed, and the sliding block can be randomly lifted along the main shaft of the upright post in the contraction area and the sawtooth area, so that the descending process is completed; when the slide block descends to a reset area at the bottom of the upright post, the bottom firing pin impacts two ends of the reset plate to drive the latch plate to deform upwards, so that the upper and lower clamping blocks are separated from each other and are not interlocked, and the positioning tongue returns to a normal extending state under the action of the spring, thereby completing the reset process; at the moment, the traction rope can drag the sliding block to move upwards, when the sliding block meets a sawtooth inclined plane, the positioning tongue slightly retracts but cannot be locked, when the sliding block reaches a sawtooth horizontal plane, the positioning tongue rebounds to the maximum extending state, the sliding block is accurately positioned on the plane, and therefore the positioning process is completed. The process is circularly carried out according to the test requirement so as to complete the test tasks of different heights of the signal receiver at different positions of the annular rail.
Claims (10)
1. A device for continuously testing the electromagnetic wave reflection performance of electromagnetic shielding clothes is characterized by comprising a surrounding rotating device arranged in a darkroom (1) and a double-power disc device arranged outside the darkroom (1), the surrounding rotating device is in transmission connection with a double-power disc device, the double-power disc device drives the surrounding rotating device to rotate, the rotating center in the middle of the surrounding rotating device is provided with a human body model (2) for installing electromagnetic shielding clothes to be tested, the surrounding rotating device is also provided with a signal receiving device (8), the surrounding rotating device drives the signal receiving device (8) to rotate around the mannequin (2), and a signal transmitting system (21) is further arranged in the darkroom (1), and the double-power disc device is further connected with the signal receiving device (8) through a traction rope (11).
2. The device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes according to claim 1, wherein the encircling and rotating device comprises a hollow shaft ring (4), a support column (3) is installed in the hollow middle of the hollow shaft ring (4), the mannequin (2) is fixed on the support column (3), a plurality of spokes (6) are uniformly arranged on the side wall of the hollow shaft ring (4) around the side wall of the hollow shaft ring, the other ends of the spokes (6) are connected with an annular rail (5) together, the signal receiving device (8) is fixedly arranged on the upper surface of the annular rail (5), a crawler (7) is arranged on the annular rail (5) in a surrounding manner, and the crawler (7) bypasses the annular rail (5) and then passes through a darkroom (1) to be sleeved on a dual-power device.
3. The device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes according to claim 2, wherein the double-power disc device comprises a support shaft (31), a rotating shaft (32) is sleeved on the upper portion of the support shaft (31), a main disc (9) is sleeved on the rotating shaft (32), a handle is arranged on the main disc (9), a height auxiliary disc (10) is fixedly arranged at the upper end of the support shaft (31) above the main disc (9), scales are respectively carved on the main disc (9) and the height auxiliary disc (10), the crawler (7) is sleeved on the main disc (9), a rope penetrating device (27) is arranged on the height auxiliary disc (10) and is of a rod-shaped structure, a transverse rope penetrating hole (28) is formed in the middle of the rope penetrating device (27), a rope pressing bolt (30) is further arranged at the top of the rope penetrating device (27), and the rope pressing bolt (30) extends to the rope penetrating hole (28), the height auxiliary disc (10) is further provided with a rope winder (29), one end of the traction rope (11) is wound on the rope winder (29), the other end of the traction rope penetrates through a rope penetrating hole (28) of the rope penetrating device (27) and then is connected with the dynamic signal receiving device (8), and a handle is arranged on the rope winder (29).
4. The device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes according to claim 3, wherein the signal receiving device (8) comprises a signal receiver (12), the signal receiver (12) is connected with a vertical supporting frame (13), the other end of the vertical supporting frame (13) is fixedly connected with a transverse supporting frame (14), the device further comprises a vertical column (15), a sawtooth slideway (17) is arranged in the vertical column (15) along the height direction of the vertical column, a sliding block (16) capable of being clamped in a telescopic manner is arranged in the sawtooth slideway (17), a bracket shaft (37) is arranged at the bottom of the sliding block (16), a hollow central shaft (35) extending along the height direction of the vertical column is arranged in the middle of the vertical column (15), the sliding block (16) is sleeved on the hollow central shaft (35), the upper end of the hollow central shaft (35) extends out of the top of the vertical column (15) and is connected with a traction ring (34), symmetrical notches (36) are formed in two corresponding side walls of the hollow middle shaft (35), the bracket shaft (37) penetrates through the notches (36) of the hollow middle shaft (35), the traction rope (11) penetrates through the traction ring (34) and is downwards connected to the bracket shaft (37) penetrating through the hollow middle shaft (35), at least one side wall of the sliding block (16) is provided with a side convex plate (33), and the other end of the transverse support frame (14) is connected to the side convex plate (33).
5. The device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes according to claim 4, wherein sawtooth slideways (17) are symmetrically arranged on two sides inside the upright post (15), the tooth form of each sawtooth slideway (17) is a right-angled triangle structure, one side of each right-angled side faces upwards and is fixed on the inner wall of the upright post, the sawtooth slideways (17) on two sides are located at the upper end of the upright post (15) to form a slideway upper part tongue pressing area (19), and the width of the slideway upper part tongue pressing area (19) is consistent with that of the sliding block (16).
6. The device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes according to claim 5, wherein a hollow cylinder (38) is arranged on the slider (16) along the height direction of the slider, the inner diameter of the hollow cylinder (38) is adapted to the outer diameter of the hollow center shaft (35), the slider (16) is sleeved on the hollow center shaft (35) through the hollow cylinder (38), springs (39) are fixedly connected to both sides of the hollow cylinder (38) corresponding to the sawtooth slide ways (17) in the lower position inside the slider (16), the other ends of the springs (39) are connected with positioning tongues (18), the other ends of the positioning tongues (18) can extend out of the side walls of the slider (16) on the corresponding side, one side surfaces of the positioning tongues (18) extending out of the side walls of the slider (16) are arranged as inclined surfaces and are matched with the tooth-shaped inclined surfaces of the sawtooth slide ways (17), the novel spring bolt resetting device is characterized in that lock catch plates (40) corresponding to the positioning tongues (18) are further arranged on two sides of the hollow cylinder (38) which is positioned above the positioning tongues (18) in the sliding block (16), lower clamping blocks (43) and upper clamping blocks (44) are respectively arranged on the upper surfaces of the positioning tongues (18) and the lower surfaces of the lock catch plates (40), when the sliding block (16) moves to a tongue pressing area (19) on the upper portion of the sliding way, the positioning tongues (18) move inwards until the lower clamping blocks (43) and the upper clamping blocks (44) are clamped mutually, a resetting plate (41) perpendicular to the lock catch plates (40) is further arranged at one end, far away from the hollow cylinder (38), of each locking plate (40), resetting plate bumping holes (45) are formed in two ends of each resetting plate (41), and striker rods (20) are arranged at positions, corresponding to the resetting plate bumping holes (45), of the bottoms of the upright columns (15).
7. The apparatus for continuously testing the electromagnetic wave reflection performance of electromagnetic shielding clothes according to claim 6, wherein a fixing ring (42) is further disposed on the positioning tongue (18).
8. The apparatus for continuously testing the performance of electromagnetic wave reflected by the electromagnetic shielding garment according to claim 6, wherein the flexible wear-resistant material of the lower fixture block (43) and the upper fixture block (44) is in the shape of a straight surface on one side of an inclined surface, the inclined surfaces of the lower fixture block (43) and the upper fixture block (44) are opposite, when the relative movement occurs, the inclined surfaces of the lower fixture block (43) and the upper fixture block (44) are deformed and pass through each other and are blocked by the straight surface, thereby completing the locking action.
9. The device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes as claimed in claim 6, wherein a groove (25) is formed in the upper surface of the annular rail (5), the upright post (15) is fixed in the groove (25), a track groove (26) is formed in each of the side walls of the annular rail (5) and the main disc (9), the track (7) is sleeved in the groove (26) of the annular rail (5) and the main disc (9) to realize belt transmission of the annular rail (5) and the main disc (9), a track through hole (23) and a traction rope through hole (24) are formed in the wall of the darkroom (1), and the track (7) and the traction rope (11) respectively penetrate through the wall of the darkroom (1) through the track through hole (23) and the traction rope through hole (24).
10. A method for continuously testing the electromagnetic wave reflection performance of electromagnetic shielding clothes is characterized in that the device for continuously testing the electromagnetic wave reflection performance of the electromagnetic shielding clothes, which is disclosed by claim 6, is implemented according to the following steps:
step 1, selecting an annular rail (5) with a corresponding size according to experimental requirements, mounting an upright post (15) on the annular rail, mounting a signal receiving device (8) on the upright post (15), placing a sliding block (16) in a reset area, namely, the bottom of the upright post (15), placing a signal transmitting system (21) at a fixed position according to the testing requirements, adjusting initial positions of a traction rope and a track according to scales, and closing a door of a darkroom (1);
step 2, when the mannequin (2) does not wear electromagnetic shielding clothes, starting a signal transmitting system (21), rotating a main disc (9), driving a crawler belt (7) to rotate around the mannequin according to the scales and rotate to a required position, further adjusting the height of a sliding block (16) at the position according to requirements, collecting and storing electromagnetic field intensity signals of a signal receiver (12) at the position, recording the position of the annular rail and the height of the sliding block of each test point, and repeating the steps to continuously rotate the signal receiver to different annular positions and continuously test signals with different heights at each position;
step 3, stopping the work of the signal transmitting system (21) and the signal receiver (12), opening the darkroom door, wearing the electromagnetic shielding clothes to be tested on the mannequin, adjusting the traction rope and the crawler to the initial position and closing the darkroom door, wherein other settings are consistent with those in the step 1;
step 4, starting a signal emission system (21), sequentially rotating the main disc to the annular position of each test point recorded in the step 2, sequentially adjusting the sliding block (16) to the height consistent with the test points in the step 2 at the position, and sequentially collecting and storing electromagnetic field intensity signals of the signal receiver at different positions and different heights;
step 5, obtaining the electromagnetic wave reflection size of each test point by adopting a reflectivity calculation formula according to the electromagnetic field intensity test results of corresponding points when the mannequin is not dressed and dressed, and evaluating the electromagnetic wave reflection performance of the electromagnetic shielding clothes according to data of all the test points;
step 6, setting the size of a new annular rail, repeating the steps 1-5, and continuously testing the reflectivity of the electromagnetic waves at other positions when the electromagnetic waves are reflected by the electromagnetic shielding clothes;
and 7, changing the frequency and the position of the emission source, repeating the steps 1-6, and testing the reflection condition of the electromagnetic shielding clothes on the electromagnetic waves when different parameters are changed.
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