An automatic replacement system for vehicle anechoic chamber test antenna

Abstract

The present invention provides an automatic replacement system for antennas in a whole vehicle anechoic chamber test, comprising an antenna storage chamber arranged directly below the anechoic chamber; the top of the antenna storage chamber is connected to the bottom of the anechoic chamber through a through opening, a shield is movably inserted at the through opening, the shield is installed on the top of a sliding platform, the sliding platform is installed in the antenna storage chamber, a first lifting device is arranged at the bottom of the sliding platform, and the sliding platform is slidably connected to the first lifting device, a horizontal sliding device is arranged on the movable section of the first lifting device, the horizontal sliding device is a telescopic structure, and it drives the sliding platform to slide horizontally relative to the first lifting device; a lifting platform is also arranged in the antenna storage chamber, and a second lifting device is arranged at the bottom of the lifting platform. Under the premise of meeting the requirements of the whole vehicle electromagnetic shielding anechoic chamber environment, the antenna automatic replacement system completes the corresponding test antenna switching work in the radiation emission and radiation immunity test environment during the test through automatic operation control.

Description

Technical Field

[0001] The invention relates to the field of electromagnetic compatibility, in particular to a test antenna used in a half-wave darkroom of a whole vehicle, and specifically to an automatic replacement system for the test antenna in a half-wave darkroom of a whole vehicle. Background Art

[0002] The vehicle half-wave darkroom is one of the important sites for electromagnetic compatibility certification testing of various vehicles and their electrical and electronic components. The shielded room is a metal enclosure with a large number of resonant frequencies. Once the radiation frequency and excitation method of the device under test cause the shielded room to resonate, the measurement error can reach 20-30dB. Therefore, it is necessary to install absorbing materials on the walls and top of the shielded room to greatly reduce the reflection, that is, there are only direct waves and ground reflected waves when the radio waves propagate. In order to ensure the accuracy of the test, the half-wave darkroom selects suitable absorbing materials, field generation systems and shielding shell shapes to reduce the irrelevant energy in the test area to below the limit value.

[0003] In the electromagnetic compatibility test using the whole vehicle anechoic chamber, the radiation emission test requires that the background noise of the anechoic chamber is less than 6dB. Regardless of whether it is sweeping the background noise or the whole vehicle test process, non-test related items and equipment will affect the background noise and test results. Therefore, it is not allowed to place non-test related items and equipment in the anechoic chamber during the radiation emission test, that is, items and equipment including the antenna of the radiation immunity test must be removed from the anechoic chamber; when conducting the radiation immunity test in the anechoic chamber environment, all electronic products and components exposed to the environment may be at risk of performance degradation and damage. Generally, electronic products and equipment not related to the test will not be placed in the anechoic chamber, and the radiation emission system will usually be removed from the anechoic chamber.

[0004] Currently, the logarithmic periodic antennas used in the radiated emission and radiated immunity tests of the whole vehicle anechoic chamber are huge. To replace them, the door of the whole vehicle anechoic chamber must be opened during the test item switching process, and multiple testers must work together to promote the process. The antenna must be stored and replaced outside the anechoic chamber, and then the antenna to be replaced must be pushed to the antenna position in the anechoic chamber before the door of the whole vehicle anechoic chamber is closed. Such operations are entirely controlled by the testers’ experience, and the process is time-consuming and laborious, with the risk of damage to the antenna and the anechoic chamber’s absorbing materials.

[0005] Therefore, it is necessary to invent a system that meets the requirements of the electromagnetic shielding anechoic chamber environment of the entire vehicle and can realize automatic and rapid replacement of the test antenna. Summary of the invention

[0006] In view of the above, it is necessary to provide an automatic replacement system for the test antenna in the vehicle anechoic chamber, which, under the premise of meeting the requirements of the vehicle electromagnetic shielding anechoic chamber environment, completes the corresponding test antenna switching work in the radiation emission and radiation immunity test environment during the test through automatic operation and control, so as to solve the problem that the antenna replacement relying on manual operation and control of the test personnel is time-consuming and labor-intensive, and it is very easy to cause damage to the antenna or the anechoic chamber absorbing material due to human error, resulting in huge property losses.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A whole vehicle radio wave darkroom test antenna automatic replacement system, comprising an antenna storage room arranged directly below the darkroom; the top of the antenna storage room and the bottom of the darkroom are connected through a through opening, a shield is movably inserted at the through opening, the shield is installed on the top of a sliding platform, the sliding platform is installed in the antenna storage room, a first lifting device is arranged at the bottom of the sliding platform, and the sliding platform is slidably connected to the first lifting device, the lifting direction of the first lifting device is up and down, the first lifting device drives the shield to be lifted and lowered so that the shield is inserted into the through opening or is located directly below the bottom of the darkroom, a horizontal sliding device is arranged on the movable section of the first lifting device, the horizontal sliding device is a telescopic structure, and its fixed section is installed on the first lifting device, the telescopic end of the horizontal sliding device is connected to the bottom of the sliding platform, and drives the sliding platform to slide horizontally relative to the first lifting device;

[0009] A lifting platform is also provided in the antenna storage room. The top of the lifting platform is used to place the antenna, which is arranged opposite to the through opening. A second lifting device is provided at the bottom of the lifting platform. The lifting direction of the second lifting device is up and down, which drives the lifting platform to be plugged into the through opening or is located directly below the through opening. The lifting platform and the shield are not plugged into the through opening at the same time.

[0010] Furthermore, the shielding plate and the lifting platform are both made of metal materials, and the tops of the two and the side walls facing the through opening when plugged into the through opening are wrapped by a wave absorbing layer, and the wave absorbing layer is made of a wave absorbing material.

[0011] Furthermore, the first lifting device, the horizontal sliding device and the second lifting device are all pneumatic telescopic cylinders.

[0012] Furthermore, four first lifting devices are arranged, and the four first lifting devices are arranged around the outside of the second lifting device and the lifting platform; two horizontal sliding devices are arranged, and the two horizontal sliding devices are arranged on opposite sides of the second lifting device, and the fixed section of each horizontal sliding device is fixedly connected to the movable section of the first lifting device on its side.

[0013] Furthermore, elastic air bags are arranged on the four side walls of the shield and the lifting platform, and the elastic air bags are connected to the air source device through an inflation tube, and the inflation tube and the air source device are both arranged in the antenna storage room.

[0014] Furthermore, both inner and outer sides of the elastic airbag are coated with a wave absorbing layer.

[0015] Furthermore, the elastic airbag has a plurality of locking protrusions arranged at intervals, the locking protrusions are connected to the elastic airbag, and do not protrude from the outer wall of the elastic airbag when the elastic airbag is in an uninflated state, but protrude from the outer wall of the elastic airbag when the elastic airbag is in an inflated state; slots for accommodating the elastic airbag in an inflated state are provided on the four walls of the through opening, and a plurality of locking slots are provided at intervals at the bottom of the slot, each locking slot matches a locking protrusion, and when the elastic airbag is in an inflated state, the locking protrusion is snapped into its corresponding slot.

[0016] Furthermore, each locking protrusion is in the form of an annular strip.

[0017] Furthermore, at least one slot has a contact switch at its bottom, the triggering portion of the contact switch is located in the slot, the contact switch is connected to the central control system via a cable, and the central control system is respectively connected to the first lifting device, the horizontal sliding device, the second lifting device and the air source device via cables.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention can realize the automatic lifting and storage of the antenna, without the need for manual movement, saving time and effort, and does not occupy the space of the darkroom when not in use;

[0020] 2. The opening between the antenna storage room and the darkroom of the present invention is closed by a shield made of absorbing material when the antenna is not in use, and is closed by a lifting platform also made of absorbing material when the antenna is in use. In this way, the arrangement of the antenna storage room and the equipment therein will not affect the electromagnetic compatibility performance of the radio wave darkroom environment, nor will it become a fixed interference source in the radio wave darkroom. At the same time, it will not affect the test results of the darkroom, and its performance will not be affected by the tests conducted in the darkroom. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention when the shield plate seals the opening.

[0022] Figure 2 yes Figure 1 A partial view of the .

[0023] Figure 3 It is a structural schematic diagram of the lifting platform of the present invention when the opening is sealed.

[0024] Figure 4 yes Figure 3 A partial view of the .

[0025] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0026] Main component symbols

[0027] In the figure: 1 is a darkroom, 2 is an antenna storage room, 3 is a shield, 4 is a sliding platform, 5 is a first lifting device, 6 is a horizontal sliding device, 7 is a lifting platform, 8 is a second lifting device, 9 is an elastic airbag, 10 is a positioning protrusion, 11 is an inflation tube, 12 is an air source device, 13 is a through port, 14 is a slot, 15 is a card slot, and 16 is a contact switch.

[0028] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0029] See also Figures 1 to 5 In a preferred embodiment of the present invention, a whole vehicle anechoic chamber test antenna automatic replacement system comprises an antenna storage chamber 2 arranged directly below the anechoic chamber 1; the top of the antenna storage chamber 2 and the bottom of the anechoic chamber 1 are connected through a through opening 13, and a shield 3 is movably inserted at the through opening 13, and the shield 3 is installed on the top of a sliding platform 4, and the sliding platform 4 is installed in the antenna storage chamber 2, and a first lifting device 5 is provided at the bottom of the sliding platform 4, and the sliding platform 4 is slidably connected to the first lifting device 5, and the lifting direction of the first lifting device 5 is up and down. The shield plate 3 is driven to rise and fall so that the shield plate 3 is inserted into the opening 13 or is located directly below the bottom of the darkroom 1. A horizontal sliding device 6 is provided on the movable section of the first lifting device 5. The horizontal sliding device 6 is a telescopic structure, and its fixed section is installed on the first lifting device 5. The telescopic end of the horizontal sliding device 6 is connected to the bottom of the sliding platform 4, which drives the sliding platform 4 to slide horizontally relative to the first lifting device 5. In conjunction with the lifting action of the first lifting device 5, the shield plate 3 can be located directly below the opening 13 and inserted into the sealed opening 13, or the shield plate 3 can be located below the opening 13 and staggered with the opening 13.

[0030] The antenna storage room 2 is also provided with a lifting platform 7, the top of the lifting platform 7 is used to place the antenna, which is arranged opposite to the through-hole 13, and the bottom of the lifting platform 7 is provided with a second lifting device 8, the lifting direction of the second lifting device 8 is the up-down direction, which drives the lifting platform 7 to plug into the through-hole 13 or be located directly below the through-hole 13, and the lifting platform 7 and the shield 3 are not plugged into the through-hole 13 at the same time. That is, the lifting platform 7 is lifted and lowered under the action of the second lifting device 8, so that the antenna on it rises to the darkroom 1 or falls to the antenna storage room 2 for storage.

[0031] That is, the present invention realizes automatic replacement of the antenna through the above-mentioned setting, which is convenient for use. Specifically, when the antenna is not needed, the lifting platform 7 and the antenna are stored together in the antenna storage room 2. At this time, the shield 3 is inserted into the opening 13, and it is preferred that the top surface of the shield 3 is flush with the floor of the darkroom 1. When the antenna needs to be used, the first lifting device 5 is lowered, and the shield 3 moves down with the first lifting device 5 to just below the opening 13. When the shield 3 is completely separated from the opening 13, the horizontal sliding device 6 is operated, and the shield 3 is driven to move to one side of the opening 13 by driving the sliding platform 4 relative to the first lifting device 5, until the shield 3 and the opening 13 are completely offset. Then, the second lifting device 8 rises, and the lifting platform 7 drives the antenna to rise together, until the lifting platform 7 is inserted into the opening 13, and the antenna is completely located in the darkroom 1, that is, the placement of the antenna is realized, which is convenient for subsequent use. When the antenna is used, the second lifting device 8 moves down, driving the lifting platform 7 and the antenna to the bottom of the opening 13 until they are located under the sliding platform 4. Then, the horizontal sliding device 6 operates, driving the sliding platform 4 to move to the bottom of the opening 13. The first lifting device 5 rises, and the shield 3 is inserted into the opening 13, thus completing the storage of the antenna. At this time, the darkroom 1 and the antenna storage room 2 are independent of each other and not connected. In this way, the test of the darkroom 1 will not affect the components in the antenna storage room 2, and the operation of the components in the antenna storage room 2 will not affect the test of the darkroom 1. Based on the above, it can be seen that the automatic replacement system of the present invention greatly reduces the workload of the staff, improves the work efficiency, and does not affect the darkroom 1 itself, and has good practicality.

[0032] Furthermore, in this embodiment, the baffle 3 and the lifting platform 7 are both made of metal materials, and the tops of the two and the side walls facing the through hole 13 when plugged into the through hole 13 are wrapped with absorbing layers, and the absorbing layers are made of absorbing materials; the first lifting device 5, the horizontal sliding device 6 and the second lifting device 8 are all pneumatic telescopic cylinders to reduce the mutual influence between the device and the darkroom 1.

[0033] Furthermore, four first lifting devices 5 are arranged, and the four first lifting devices 5 are arranged around the outside of the second lifting device 8 and the lifting platform 7; two horizontal sliding devices 6 are arranged, and the two horizontal sliding devices 6 are arranged on opposite sides of the second lifting device 8, and the fixed section of each horizontal sliding device 6 is fixedly connected to the movable section of the first lifting device 5 on its side to improve the stability of the sliding platform 4, and the first lifting device 5 and the second lifting device 8 do not affect each other.

[0034] Furthermore, elastic air bags 9 are arranged on the four side walls of the shield plate 3 and the lifting platform 7, and the elastic air bags 9 are connected to the air source device 12 through the inflation tube 11. The inflation tube 11 and the air source device 12 are arranged in the antenna storage room 2, so that the shield plate 3 and the lifting platform 7 can move in the through opening 13 through the arrangement of the elastic air bags 9, and the through opening 13 can be completely sealed when the through opening 13 is inserted, that is, in order to facilitate the shield plate 3 and the lifting platform 7 to move freely from the through opening 13, the outer contour size of the shield plate 3 and the lifting platform 7 will be slightly smaller than the opening size of the through opening 13, so that when the through opening 13 is sealed It is not in a sealed state, so that the isolation between the darkroom 1 and the antenna storage room 2 is not complete, and the setting of the elastic airbag 9, under the action of the air source device 12, it is inflated and swelled, and can abut against the mouth wall of the through hole 13, which makes the through hole 13 completely sealed, and the darkroom 1 and the antenna storage room 2 can be completely isolated. When the movable shutter 3 and the lifting platform 7 are needed, the elastic airbag 9 can be deflated. Therefore, in this embodiment, the air source device 12 is an inflation and deflation device, and the elastic airbag 9 is connected to the inflation port and the deflation port of the air source device 12 respectively through the inflation tube 11, so that under the action of the air source device 12, the elastic airbag 9 can be inflated and deflated. In order to further prevent electromagnetic waves from passing through the elastic airbag 9 to affect the darkroom 1 and the antenna storage room, it is preferred that the inner and outer sides of the elastic airbag 9 are coated with an absorbing layer, and the absorbing layer is made of absorbing material. More preferably, the elastic airbag 9 is made of absorbing material.

[0035] Further, the elastic airbag 9 has a plurality of spaced positioning protrusions 10, the positioning protrusions 10 are connected to the elastic airbag 9, and do not protrude from the outer wall of the elastic airbag 9 when the elastic airbag 9 is not inflated, but protrude from the outer wall of the elastic airbag 9 when it is inflated; the four walls of the through-port 13 are provided with slots 14 for accommodating the elastic airbag 9 in the inflated state, and the bottom of the slot 14 is spaced with a plurality of slots 15, each slot 15 matches a positioning protrusion 10, and when the elastic airbag 9 is inflated, the positioning protrusion 10 is snapped into the corresponding slot 15, so that the elastic airbag 9 is more tightly connected to the through-port 13 through the arrangement of a plurality of positioning protrusions 10 and slots 15, and the electromagnetic waves are more thoroughly isolated. Preferably, each positioning protrusion 10 is an annular strip structure. Furthermore, at least one of the slots 15 is provided with a contact switch 16 at its bottom, and preferably each slot 15 is provided with a contact switch 16, a triggering portion of the contact switch 16 is located in the slot 15, the contact switch 16 is connected to the central control system via a cable, and the central control system is respectively connected to the first lifting device 5, the horizontal sliding device 6, the second lifting device 8 and the air source device 12 via cables, and the engagement of the locking protrusion 10 with the slot 15 is known through the setting of the contact switch 16, that is, whether the elastic airbag 9 is inserted into the opening 13 in place, when all the contact switches 16 are triggered, it means that all the locking protrusions 10 have been engaged, and each control module can be controlled, and the darkroom 1 can also be tested, and when one of the contact switches 16 is not triggered, it means that the elastic airbag 9 is not inserted into place, and needs to be adjusted before the test can be carried out, thereby reducing the influence of electromagnetic waves on the antenna storage room 2 and the darkroom 1.

[0036] Based on the above, it can be known that the automatic antenna replacement system of the present invention does not affect the electromagnetic compatibility performance of the anechoic chamber 1 environment, and does not become a fixed interference source in the anechoic chamber 1; after the automatic antenna replacement is completed, there is no change in the site switching, which affects the change of the background noise in the anechoic chamber 1 environment; and the anti-interference test conducted in the anechoic chamber 1 cannot cause any impact on the test antenna automatic replacement system, and does not become a stable test equipment in the anechoic chamber 1. The above three points are the key points and difficulties of the design of this patent.

[0037] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. An automatic replacement system for vehicle anechoic chamber test antennas, comprising an antenna storage room arranged directly below the anechoic chamber; characterized in that: The top of the antenna storage room and the bottom of the darkroom are connected through a through opening, a shield is movably inserted at the through opening, the shield is installed on the top of the sliding platform, the sliding platform is installed in the antenna storage room, a first lifting device is provided at the bottom of the sliding platform, and the sliding platform is slidably connected with the first lifting device, the lifting direction of the first lifting device is up and down, the first lifting device drives the shield to be lifted and lowered so that the shield is inserted into the through opening or is located directly below the bottom of the darkroom, a horizontal sliding device is provided on the movable section of the first lifting device, the horizontal sliding device is a telescopic structure, and its fixed section is installed on the first lifting device, the telescopic end of the horizontal sliding device is connected to the bottom of the sliding platform, and drives the sliding platform to slide horizontally relative to the first lifting device; The antenna storage room is also provided with a lifting platform, the top of the lifting platform is used to place the antenna, which is arranged directly opposite to the through-hole, and the bottom of the lifting platform is provided with a second lifting device, the lifting direction of the second lifting device is up and down, and it drives the lifting platform to be plugged into the through-hole or is located directly below the through-hole, and the lifting platform and the shield are not plugged into the through-hole at the same time; The shield and the lifting platform are both made of metal materials, and the tops of the two and the side walls facing the through-hole when plugged in are wrapped by a wave-absorbing layer, and the wave-absorbing layer is made of a wave-absorbing material; The shield and the four side walls of the lifting platform are provided with elastic air bags, the elastic air bags are connected to the air source device through an inflation tube, and the inflation tube and the air source device are both arranged in the antenna storage room; The inner and outer sides of the elastic airbag are coated with wave absorbing layers.

2. The automatic replacement system for vehicle anechoic chamber test antenna according to claim 1, characterized in that: The first lifting device, the horizontal sliding device and the second lifting device are all pneumatic telescopic cylinders.

3. The automatic replacement system for vehicle anechoic chamber test antenna according to claim 1, characterized in that: Four first lifting devices are arranged, and the four first lifting devices are arranged around the outside of the second lifting device and the lifting platform; two horizontal sliding devices are arranged, and the two horizontal sliding devices are arranged on opposite sides of the second lifting device, and the fixed section of each horizontal sliding device is fixedly connected to the movable section of the first lifting device on its side.

4. The automatic replacement system for vehicle anechoic chamber test antenna according to claim 1, characterized in that: The elastic airbag has a plurality of latching protrusions arranged at intervals, the latching protrusions are connected to the elastic airbag, and do not protrude from the outer wall of the elastic airbag when the elastic airbag is in an uninflated state, but protrude from the outer wall of the elastic airbag when the elastic airbag is in an inflated state; slots for accommodating the elastic airbag in an inflated state are provided on the four walls of the through opening, a plurality of latching slots are provided at intervals at the bottom of the slots, each latching slot matches a latching protrusion, and when the elastic airbag is in an inflated state, the latching protrusion is snapped into its corresponding slot.

5. The automatic replacement system for vehicle anechoic chamber test antenna as claimed in claim 4, characterized in that: Each clamping position protrusion is in a ring-shaped strip structure.

6. The automatic replacement system for vehicle anechoic chamber test antenna according to claim 4, characterized in that: There is at least one slot with a contact switch at the bottom, the triggering part of the contact switch is located in the slot, the contact switch is connected to the central control system through a cable, and the central control system is respectively connected to the first lifting device, the horizontal sliding device, the second lifting device and the air source device through cables.

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