A free-field anti-interference test auxiliary equipment for automotive electromagnetic compatibility vehicle-mounted radar

Abstract

The invention discloses an auxiliary device for free-field anti-interference test of automobile electromagnetic compatibility on-board radar, comprising a reversing radar, an obstacle, a driving component, a host computer, a power supply connected to the reversing radar, and an interference antenna for creating an interference environment for the reversing radar; one side surface of the obstacle is fixed on the driving component, and the other side surface is arranged facing the detection end of the reversing radar, so as to drive the obstacle to move toward the reversing radar; the driving component is connected to the host computer, and the distance and moving speed of the obstacle relative to the reversing radar are controlled by the host computer; the driving component comprises a base, a mounting member, and a reducer, one side of the base is provided with a slide rail pointing to the reversing radar, the lower end of the mounting member is slidably connected in the slide rail, and the obstacle is fixed to one end of the mounting member along the moving direction of the slide rail; the sprocket is fixed to the output end of the reducer, the chain is horizontally arranged and fixed to one side of the mounting member, and the chain is meshed and connected with the sprocket.

Description

Technical Field

[0001] The invention belongs to the field of anti-interference testing of reversing radars, and in particular relates to auxiliary equipment for free-field anti-interference testing of automobile electromagnetic compatibility vehicle-mounted radars. Background Art

[0002] The reversing radar is tested for interference in a free field of components. The anti-interference reference standard is IS0 11422-2. The test frequency band is 80MHz-2000MHz. The anti-interference level is divided into 3 levels: 30V / m, 50V / m, and 75V / m.

[0003] When conducting the anti-interference test of the reversing radar, the current method is for the experimenter to manually move the obstacle at different speeds in the laboratory. Manually moving the obstacle is prone to large human errors. In addition, the anti-interference test of the reversing radar will add an interference antenna to the test environment, which will cause physical harm to the personnel who stay in the laboratory for a long time. Summary of the invention

[0004] In view of this, the present invention aims to propose an auxiliary device for free-field anti-interference test of automotive electromagnetic compatibility on-board radar, which uses a driving component with a speed-regulating motor to drive the obstacle to accelerate or decelerate, move closer or farther away from the on-board radar, and judges the use of the radar by the response sound and frequency of the radar, thereby reducing human errors, saving manpower, and reducing the physical harm of the test personnel to the interference antenna.

[0005] To achieve the above object, the technical solution of the present invention is implemented as follows, in conjunction with the accompanying drawings:

[0006] An auxiliary device for electromagnetic compatibility vehicle-mounted radar free-field anti-interference test of automobiles, comprising a reversing radar, an obstacle 1, a driving component 2, a host computer, a power supply connected to the reversing radar, and an interference antenna for creating an interference environment for the reversing radar; one side surface of the obstacle 1 is fixedly arranged on the driving component 2, and the other side surface is arranged directly facing the detection end of the reversing radar, so as to drive the obstacle 1 to move toward the reversing radar; the driving component 2 is connected to the host computer, and the distance and moving speed of the obstacle 1 relative to the reversing radar are controlled by the host computer.

[0007] Furthermore, the driving assembly 2 includes a base 21, a mounting member 22, a chain 23, a sprocket 24, a reducer 25, and a limit member 26; a slide rail 211 pointing to the reversing radar is provided on one side of the base 21, the lower end of the mounting member 22 is slidably connected in the slide rail 211, and the obstacle 1 is fixed to one end of the mounting member 22 along the moving direction of the slide rail 211; the reducer 25 is fixed to the upper surface of the base 21, the sprocket 24 is fixed to the output end of the reducer 25, the chain 23 is horizontally arranged and fixed to one side of the mounting member 22, and the chain 23 is meshed and connected with the sprocket 24; the lower end of the limit member 26 is fixed to the upper surface of the base 21, and the upper end of the limit member 26 is corresponding to the upper end of the mounting member 22 and is provided with a limit portion for limiting the shaking of the mounting member 22.

[0008] Furthermore, the mounting member 22 includes a mounting plate 221, a cylindrical cross beam 222, and a cylindrical vertical beam 223; the cylindrical cross beam 222 is fixed above the mounting plate 221 through the cylindrical vertical beam 223; a plurality of rollers 27 are evenly distributed on the lower end of the mounting plate 221, and the rollers 27 are slidably connected to the slide rail 211.

[0009] Furthermore, the roller 27 is arranged at the lower end of the mounting plate 221 through a connecting member 28, and the connecting member 28 includes a square shell 281 with an opening at the lower end, and a rotating shaft 282 is arranged on the inner wall of the square shell 281 perpendicular to the slide rail 211, and the roller 27 is hinged to the square shell 281 through the rotating shaft 282, and the upper surface of the square shell 281 is detachably connected to the mounting plate 221.

[0010] Furthermore, a square groove is provided at the lower end of the mounting plate 221 corresponding to the square shell 281 of the connecting piece 28, and the two outer side walls of the square shell 281 protrude from the two side surfaces of the mounting plate 221 by the same height, and are both fitted with the inner side walls of the slide rail 211; the two side surfaces of the square shell 281 extend toward both ends to form a connecting plate 283, and the inner surface of the connecting plate 283 is fitted with the side surface of the mounting plate 221, and the connecting plate is provided with a countersunk hole, and the mounting plate 221 is provided with a screw through hole corresponding to the countersunk hole.

[0011] Furthermore, a plurality of the limit members 26 are evenly arranged along the direction of the slide rail 211; the limit member 26 includes a fixing rod 261, the lower end of the fixing rod 261 is fixed on the base 21, the upper end of the fixing rod 261 is perpendicular to the mounting member 22, and a square rod 262 is extended toward the mounting member 22, and the lower end surface of the square rod 262 is fitted with the upper end surface of the cylindrical cross beam 222; two cylindrical rods 263 are vertically fixed to the lower end surface of the square rod 262, and the upper end cross beam 222 passes through the inner sides of the two cylindrical rods 263 and fits with the inner sides of the cylindrical rods 263.

[0012] Furthermore, the power source is a 12V battery; both the output end and the input end of the power source are provided with an artificial network.

[0013] Furthermore, the obstacle 1 is a foam partition.

[0014] Compared with the prior art, the automotive electromagnetic compatibility vehicle-mounted radar free-field anti-interference test auxiliary equipment described in the present invention has the following beneficial effects:

[0015] 1. The present invention uses a driving component with a speed regulating motor to drive the obstacle to accelerate or decelerate, move closer or farther away from the vehicle-mounted radar, and judges the use of the radar based on the response sound and frequency of the radar, thereby reducing human errors, saving manpower, and reducing the physical harm of the test personnel caused by the interference antenna.

[0016] 2. The limiter of the driving assembly of the present invention cooperates with the mounting member, and the lower end surface of the square rod of the limiter fits with the upper end surface of the mounting member to limit the up and down movement of the mounting member, that is, to limit the up and down movement of the chain fixed on the mounting member to ensure the cooperation between the chain and the sprocket. The upper end of the mounting member passes through the inner sides of the two cylindrical rods to ensure that the upper end of the mounting member will not swing to both sides, so that the mounting member can move stably along the slide rail.

[0017] 3. A roller can be installed on the inner side of the square shell of the connecting piece of the present invention, and the mounting piece cooperates with the guide rail through the roller, so that the movement is smoother. In addition, the outer side of the connecting piece can fit with the inner wall of the guide rail, reducing the area of ​​the cooperation processing between the lower end of the mounting plate and the inner wall of the guide rail. Finally, the connecting piece and the mounting piece are detachably connected, which makes replacement more convenient and prolongs the service life of the mounting piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 A schematic diagram of a free-field anti-interference test auxiliary device for an automotive electromagnetic compatibility vehicle-mounted radar according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the coordination between the obstacle and the driving assembly according to an embodiment of the present invention;

[0021] Figure 3 This is a diagram of the matching structure of the mounting plate and the connecting piece according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the matching structure of the connecting member and the roller according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of an artificial network circuit according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1-obstacle; 2-driving assembly; 21-base; 211-slide rail; 22-mounting piece; 221-mounting plate; 222-cylindrical cross beam; 223-cylindrical vertical beam; 23-chain; 24-sprocket; 25-reducer; 26-limiting piece; 261-fixing rod; 262-square rod; 263-cylindrical rod; 27-roller; 28-connecting piece; 281-square shell; 282-rotating shaft; 283-connecting plate. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0030] like Figure 1 , Figure 2 , Figure 5As shown, an auxiliary device for free-field anti-interference test of an automotive electromagnetic compatibility vehicle-mounted radar includes a reversing radar, a power supply connected to the reversing radar, an interference antenna for creating an interference environment for the reversing radar, an obstacle 1, a drive component 2, and a host computer. One side surface of the obstacle 1 is fixed on the drive component 2, and the other side surface is arranged facing the detection end of the reversing radar. The drive component 2 includes a speed regulating motor, and the speed regulating motor is connected to a host computer for controlling the motor speed, so as to control the distance and moving speed of the obstacle 1 relative to the reversing radar.

[0031] The reduction motor and the upper computer for controlling the motor speed both adopt the existing technology. The present invention is used to detect whether the radar is working properly, and the response of the radar when the obstacle 1 approaches or moves away from the radar at different speeds under the drive of the speed regulating motor, so as to prepare for the subsequent real car detection. By adjusting the different speeds of the motor in the driving device, the simulated obstacle can be approached or moved away from the reversing radar at different speeds, so that the reversing radar detects simulated obstacles at different distances, simulating the working state of the reversing radar when reversing in actual use. The tester judges whether the vehicle-mounted radar works normally during the free field anti-interference test according to the fast and slow changes in the reversing radar audio. By adjusting the different speeds of the motor of this device, the simulated obstacle can be approached or moved away from the reversing radar at different speeds, so that the reversing radar detects simulated obstacles at different distances, simulating the working state of the reversing radar when reversing in actual use. The tester judges whether the vehicle-mounted radar works normally during the free field anti-interference test according to the fast and slow changes in the reversing radar audio.

[0032] The interference environment established by the interference antenna is a free field of components, the anti-interference reference standard is IS011422-2, the test frequency band is 80MHz-2000MHz, and the anti-interference level is divided into 3 levels, namely: 30V / m, 50V / m, and 75V / m.

[0033] like Figure 2 As shown, the driving assembly 2 includes a base 21, a mounting member 22, a chain 23, a sprocket 24, a reducer 25, and a stopper 26. A slide rail 211 pointing to the reversing radar is provided on one side of the base 21. The lower end of the mounting member 22 is slidably connected in the slide rail 211. The obstacle 1 is fixed to one end of the mounting member 22 along the moving direction of the slide rail 211.

[0034] A reducer 25 is fixedly disposed on the upper surface of the base 21, a sprocket 24 is fixedly disposed at the output end of the reducer 25, the chain 23 is horizontally disposed and meshed with the sprocket 24, and the chain 23 is fixedly disposed on one side of the mounting member 22;

[0035] The lower end of the limiting member 26 is fixedly mounted on the upper surface of the base 21 , and the upper end thereof corresponds to the upper end of the mounting member 22 and is provided with a limiting portion for limiting the shaking of the mounting member 22 .

[0036] The limiter 26 limits the up and down movement of the mounting member through the limit portion, thereby ensuring the stable cooperation between the chain and the sprocket on the mounting member, and at the same time limits the lateral shaking of the mounting member, thereby ensuring that the mounting member drives the obstacle to move stably in the slide rail.

[0037] like Figure 2 As shown, the mounting member 22 includes a mounting plate 221 disposed on the lower side of the mounting member, a cylindrical cross beam 222 disposed on the upper side of the mounting member, and a cylindrical vertical beam 223 connecting the mounting plate 221 and the cylindrical cross beam 222;

[0038] A plurality of rollers 27 are evenly arranged at the lower end of the mounting plate 221. The rollers 27 move along the slide rail 211. The rollers 27 are hinged to the mounting plate 221 via a connecting member 28. The connecting member 28 includes a square shell 281 with an opening at the lower end. A rotating shaft 282 is arranged on the inner wall of the square shell 281 perpendicular to the slide rail 211. The rollers 27 are hinged to the connecting member 28 via the rotating shaft 282. The connecting member 28 is detachably connected to the mounting plate 221.

[0039] A roller is arranged at the lower end of the connecting piece, and rolling friction enables the mounting piece to move more smoothly in the slide rail. At the same time, the connecting piece for mounting the roller on the mounting piece is detachably connected, which facilitates the replacement of the roller.

[0040] like Figure 2 , Figure 3 , Figure 4 As shown, a square groove is provided at the lower end of the mounting plate 221 corresponding to the square shell 281 of the connecting member 28, and both outer side walls of the square shell 281 protrude from both sides of the mounting plate 221 by the same height, and both fit with the inner side wall of the slide rail 211;

[0041] The two sides of the square shell 281 extend toward both ends to form a connecting plate 283 , the inner surface of the connecting plate 283 is in contact with the side of the mounting plate 221 , the connecting plate is provided with countersunk holes, and the mounting plate 221 is provided with screw holes corresponding to the countersunk holes.

[0042] The two outer side walls of the connecting member 28 protrude from the two side surfaces of the mounting plate 221 and are respectively fitted with the inner side walls of the slide rail 211. The two outer side surfaces of the connecting member 28 have a sliding guide function, which also reduces the wear of the two side surfaces near the lower end of the mounting plate 221 and the inner side walls of the slide rail 211. The processing area of ​​the sliding guide area is reduced. At the same time, the connecting member and the mounting plate are detachably connected, which is more convenient to replace after wear and tear. There is no need to replace the entire mounting member, thereby extending the service life of the mounting member.

[0043] like Figure 2 , Figure 3 , Figure 4 As shown, a plurality of rollers 27 are evenly arranged at the lower end of the mounting plate 221 , and a plurality of connecting members 28 are also arranged corresponding to the rollers 27 .

[0044] The multiple connecting members 28 are at the same height above the side of the mounting plate, ensuring smooth operation of the connecting members when they are in contact with the inner wall of the slide rail.

[0045] like Figure 2 As shown, the stopper 26 includes a fixing rod 261, the lower end of which is fixed on the base 21, the upper end of which is perpendicular to the mounting member 22 and extends toward the mounting member 22 to form an extended square rod 262, the lower end surface of which is in contact with the upper end surface of the cylindrical cross beam 222; two cylindrical rods 263 are vertically fixed to the lower end surface of the extended square rod 262, and the upper cross beam 222 passes through the inner sides of the two cylindrical rods 263 and is in contact with the inner sides of the cylindrical rods 263;

[0046] A plurality of the limiting members 26 are evenly arranged along the direction of the slide rail 211 .

[0047] The lower end surface of the square rod 262 fits with the upper end of the cylindrical cross beam 222 of the mounting piece, and is used to limit the up and down movement of the mounting piece 22, that is, to limit the up and down movement of the chain fixed on the mounting piece 22, to ensure the cooperation between the chain and the sprocket. The cylindrical cross beam 222 passes through the inner side of the two cylindrical rods 263, to ensure that the mounting piece will not shake to both sides, to ensure the stable movement of the mounting piece 22 in the slide rail.

[0048] like Figure 1 , Figure 5 As shown, the power source is a 12V battery; both the output end and the input end of the power source are provided with an artificial network 21.

[0049] The artificial network is used for the pure power supply end to reduce the interference of the power supply to the reversing radar. The artificial network is a prior art. The circuit used for the pure power supply end in the artificial network is established based on the standard GB / T 18625.

[0050] Furthermore, the obstacle is a foam partition.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An auxiliary device for free-field anti-interference test of vehicle-mounted radar for electromagnetic compatibility of automobiles, characterized by: The invention comprises a reversing radar, an obstacle (1), a driving component (2), a host computer, a power supply connected to the reversing radar, and an interference antenna for creating an interference environment for the reversing radar; one side surface of the obstacle (1) is fixedly mounted on the driving component (2), and the other side surface is arranged facing the detection end of the reversing radar, so as to drive the obstacle (1) to move toward the reversing radar; the driving component (2) is connected to the host computer, and the distance and moving speed of the obstacle (1) relative to the reversing radar are controlled by the host computer; The driving assembly (2) comprises a base (21), a mounting member (22), a chain (23), a sprocket (24), a reducer (25), and a stopper (26); a slide rail (211) pointing toward the reversing radar is disposed on one side of the base (21); the lower end of the mounting member (22) is slidably connected to the slide rail (211); the obstacle (1) is fixed to one end of the mounting member (22) along the moving direction of the slide rail (211); the reducer (25) is fixed to the upper surface of the base (21); the sprocket (24) is fixed to the output end of the reducer (25); the chain (23) is horizontally arranged and fixed to one side of the mounting member (22); the chain (23) is meshingly connected to the sprocket (24); the lower end of the stopper (26) is fixed to the upper surface of the base (21); The mounting component (22) comprises a mounting plate (221), a cylindrical cross beam (222), and a cylindrical vertical beam (223); the cylindrical cross beam (222) is fixed on the top of the mounting plate (221) through the cylindrical vertical beam (223); a plurality of rollers (27) are evenly arranged at the lower end of the mounting plate (221), and the rollers (27) are slidably connected to the slide rail (211); the rollers (27) are arranged at the lower end of the mounting plate (221) through a connecting member (28), and the connecting member (28) comprises a square shell (281) with an opening at the lower end, and a rotating shaft (282) is arranged on the inner side wall of the square shell (281) perpendicular to the slide rail (211), and the rollers (27) are hinged to the square shell (281) through the rotating shaft (282), and the upper surface of the square shell (281) is detachably connected to the mounting plate (221); A plurality of the limiting members (26) are evenly arranged along the direction of the slide rail (211); the limiting members (26) include a fixing rod (261), the lower end of the fixing rod (261) is fixed on the base (21), the fixing rod (261) is perpendicular to the mounting member (22), and a square rod (262) is extended in the direction of the mounting member (22), the lower end surface of the square rod (262) is in contact with the upper end surface of the cylindrical cross beam (222); two cylindrical rods (263) are vertically fixed to the lower end surface of the square rod (262), and the cylindrical cross beam (222) passes through the inner sides of the two cylindrical rods (263) and is in contact with the inner sides of the cylindrical rods (263).

2. The vehicle electromagnetic compatibility vehicle-mounted radar free-field anti-interference test auxiliary equipment according to claim 1 is characterized by: The lower end of the mounting plate (221) is provided with a square groove corresponding to the square shell (281) of the connecting piece (28); both outer side walls of the square shell (281) protrude from both side surfaces of the mounting plate (221) by the same height and are both in contact with the inner side walls of the slide rail (211); both side surfaces of the square shell (281) extend toward both ends to form a connecting plate (283); the inner surface of the connecting plate (283) is in contact with the side surface of the mounting plate (221); the connecting plate is provided with a countersunk hole; and the mounting plate (221) is provided with a screw through hole corresponding to the countersunk hole.

3. The vehicle electromagnetic compatibility vehicle-mounted radar free-field anti-interference test auxiliary equipment according to claim 1 is characterized by: The power source is a 12V storage battery; both the output end and the input end of the power source are provided with an artificial network.

4. The vehicle electromagnetic compatibility vehicle-mounted radar free-field anti-interference test auxiliary equipment according to claim 1 is characterized by: The obstacle (1) is a foam partition.

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