JP2006053159A - In-vehicle electric wave type radar installation and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-vehicle electric wave type radar installation which can freely be installed, while magnetically-shielding the transmission line connecting between an external connector and an internal circuit both provided on an outer case, without the external connector being controlled by any position of the internal circuit. <P>SOLUTION: In this radar installation, the outer case 60 comprises its own main body 61 and a shielding layer 62 coating its internal surface. The transmission line 73 from the internal circuit extends to its desired position along the shielding layer 62 of the outer case 60 on periphery side of this shielding layer 62, where the external connector 70 is installed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an in-vehicle signal processing device that is mounted on a vehicle, such as a radar device or a car navigation device, and receives and transmits signals to / from the outside.

  Radio wave radar devices using millimeter-wave band radio waves have low attenuation of radio wave beams even under bad weather conditions such as rain and fog, and can secure the maximum detection distance required for in-vehicle use. It is being commercialized as a sensor that measures inter-vehicle distance and relative speed. In order to prevent electromagnetic noise from leaking to the outside, such an in-vehicle radar device is considered to be provided with various magnetic shields in order to prevent electromagnetic noise from entering from the outside.

  For example, in the device described in JP-A-7-66746, by arranging a straight tube made of a conductive material between the inner surface of the outer casing and the internal circuit, and providing a signal line or the like therein, It increases the cutoff frequency in the space between the internal circuit and the inner surface of the outer casing, and shields electromagnetic noise generated from signal lines and the like.

  However, in the prior art, if the signal line connects the external connection connector provided in the outer housing and the internal circuit, the signal line is covered with a straight tube formed of a conductive material. There is a problem that it is necessary to provide a connector on the outer casing at the shortest distance from the internal circuit, and there is a problem that the installation of the connector is subject to positional restrictions. Such a restriction is not preferable for a vehicle-mounted device that is subjected to extremely severe restrictions regarding size and arrangement. For example, when an in-vehicle device is to be installed in a concave portion of a vehicle, if an external connection connector is provided at a location of the in-vehicle device, an external connection cable cannot be connected to this connector, or this external connection cable Even if the connection can be made, there is a problem that the in-vehicle apparatus cannot be installed in the recess due to this cable being in the way. In addition, if a tube having an appropriate length is bent appropriately and used instead of a straight tube for magnetic shielding, the connector can be provided at a free position. It is necessary to secure a relatively long and bent tube arrangement space in the body, leading to an increase in the size of the entire apparatus.

  Further, the above-described prior art also has a problem that electromagnetic noise emitted from the signal line leaks from the end opening on the internal circuit side of the straight cylinder, and sufficient magnetic sealing cannot be performed.

  Therefore, the invention according to the present application pays attention to such a conventional problem, and enlarges the apparatus while magnetically shielding the transmission line connecting the external connection portion provided in the outer casing and the internal circuit. The first object is to provide an in-vehicle signal processing device in which an external connection portion can be installed at a free position.

  Furthermore, a second object of the present invention is to provide an in-vehicle signal processing device capable of performing sufficient magnetic shielding.

An in-vehicle signal processing device for achieving the first object for achieving the object is as follows:
In an in-vehicle signal processing apparatus that is mounted on a vehicle and receives and / or transmits a transmission target including a signal and / or electric power with the outside,
An internal circuit for inputting the transmission target and / or outputting the transmission target;
An outer housing that covers the internal circuit and is provided with a conductive shield layer on the inner periphery side;
In order to send and receive the transmission object to and from the outside, an external connection part attached to the outer case and facing the outside of the outer case,
A transmission line for electrically connecting the internal circuit and the external connection part;
With
The transmission line has a direction in which the inner peripheral surface of the outer casing spreads between the outer peripheral surface of the outer casing and the shield layer, or the outer peripheral surface of the outer casing, starting from the external connection portion. After extending in the spreading direction, the shield layer is penetrated and connected to the internal circuit.

An in-vehicle signal processing device for achieving the second object is as follows:
In an in-vehicle signal processing apparatus that is mounted on a vehicle and receives and / or transmits a transmission target including a signal and / or electric power with the outside,
An internal circuit board having an internal circuit for inputting and / or outputting the transmission object;
A board support for supporting the internal circuit board;
An outer casing that covers the internal circuit board and the board support, and is provided with a conductive shield layer on the inner periphery;
In order to send and receive the transmission object to and from the outside, a transmission line that penetrates the shield layer from the outer peripheral side to the inner peripheral side and is electrically connected to the internal circuit,
With
The substrate support has a cylindrical shield portion that covers an outer periphery of the transmission line between the penetration position of the shield layer by the transmission line and the internal circuit board, and is formed of a conductive material,
The internal circuit board is in contact with the cylindrical shield portion and closes an end opening of the cylindrical shield portion;
The internal circuit board has a conductive layer and noise removing means for removing noise that has passed through the transmission line, and the noise removing means is immediately before the transmission line from the shield layer penetrates the conductive layer. Or it is provided in the position immediately after.

  According to the invention according to the present application, the signal line from the external connection portion to the internal circuit is guided to the target position along the outer peripheral side of the shield layer of the outer casing. It can be provided at any position without being restricted by the position.

  According to another invention of the present application, the transmission line from the shield layer of the outer casing to the internal circuit is connected to the conductive layer of the substrate on which the internal circuit is provided, the shield layer of the outer casing, and the substrate support. In addition to covering with the shield part of the base and providing noise removal means immediately before or after the conductive layer of the substrate, even if noise is on this transmission line, this noise affects various circuits including internal circuits Can be efficiently and reliably suppressed.

  Hereinafter, an embodiment of an in-vehicle signal processing device according to the present invention will be described with reference to the drawings.

  As shown in FIG. 8, the in-vehicle signal processing apparatus according to the present embodiment is an in-vehicle radar apparatus 1 that is attached to the front end portion of the host vehicle 2 and has a relative distance, relative speed, and direction to an object 5 such as a preceding vehicle. An angle is measured.

  As shown in FIG. 1, the in-vehicle radar device 1 includes a transmission antenna 11, two reception antennas 12 a and 12 b, a radome 65 that covers the radio wave radiation side of each of the antennas 11, 12 a and 12 b, and a transmission antenna 11. A high-frequency circuit 21 that gives transmission signals and receives reception signals from the reception antennas 12a and 12b, a signal processing circuit 41 that performs various arithmetic processes based on the reception signals, and an interface between the high-frequency circuit 21 and the signal processing circuit 41 Circuit 21, angular velocity sensor 55, filter circuit (noise removing means) 54 for removing noise in the transmission line, power supply circuit 51 for supplying power to each of these circuits, etc., and outer casing covering each circuit 60 and an external connection connector (external connection portion) 70.

  The high-frequency circuit 21 includes a transmitter 25 that outputs two types of transmission signals f1 and f2 with a time difference based on two types of modulation signals having different frequencies f1 and f2 from the signal processing circuit 41, and the transmission signal. The transmission side amplifiers 26a and 26b that amplify f1 and f2 and send them to the transmission antenna 11 and the like, the reception side amplifiers 27a and 27b that amplify the reception signals from the reception antennas 12a and 12b, and the reception side amplifiers 27a and 27b. Mixers 28a and 28b that mix the output of the transmission-side amplifier 26b and outputs a sum / difference signal generation circuit 29 that generates a sum signal and a difference signal of the signals from the mixers 28a and 28b.

  The signal processing circuit 41 converts the sum signal (sum) and difference signal (diff) input from the high-frequency circuit 21 via the interface circuit 31, and further converts the angular velocity signal from the angular velocity sensor 48 from an analog signal to a digital signal. A converter 44, an FFT circuit 45 that performs FFT (Fast Fourier Transform) processing on the sum signal and difference signal converted into digital signals, and the distance, relative speed, and direction to the object based on the signal from the FFT circuit 45 A measurement calculation unit 46 for obtaining an angle and a modulator 47 for generating modulation signals f1 and f2 to be sent to the high frequency circuit 21 are provided.

  Here, the principle of distance measurement and the like by the in-vehicle radar device in this embodiment will be briefly described.

  Based on the modulation signal from the modulator 47, the transmitter 25 sends the signals of the two frequencies f1 and f2 to the transmission antenna 11 via the transmission side amplifier 26a while temporally switching the signals. The transmission antenna 11 outputs two types of high-frequency radio signals corresponding to the two types of transmission signals f1 and f2 from the transmitter 25. The reflected waves from the front object 5 of the host vehicle are received by the receiving antennas 12a and 12b, and the received signals from the receiving antennas 12a and 12b are input to the sum / difference signal generation circuit 29 via the mixers 28a and 28b. . The sum / difference signal generation circuit 29 obtains the sum signal (sum) and difference signal (diff) of the two received signals and sends them to the signal processing circuit 41 via the interface circuit 31. The sum signal (sum) and difference signal (diff) are converted into digital signals by the A / D converter 44 of the signal processing circuit 41, and then analyzed on the frequency axis by the FFT circuit 45. It is converted into a frequency spectrum as shown. In the measurement calculation unit 46, for example, the relative speed of the object (target) is obtained from the frequency at the position where the signal intensity is maximum in the frequency spectrum of the sum signal. Further, a peak signal corresponding to each transmission frequency is detected from the frequency spectrum of the sum signal, and the relative distance is obtained from the phase difference between the peak signals as shown in the upper part of FIG. Further, the azimuth angle of the object is obtained from the ratio between the sum signal and the difference signal.

  The relative distance or the like of the object obtained by the measurement calculation unit 46 is transmitted to the vehicle control device or the alarm generation device via the filter circuit 54, the signal line 73b constituting the transmission line 73, the external connection connector 70, the external connection cable 85, and the like. Or the like to the external device 86. Also, from these external devices 86, the operation start command, the own vehicle speed, etc. are measured and calculated via the external connection cable 85, the external connection connector 70, the signal line 73b constituting the transmission line 73, the filter circuit 54, and the like. Input to the unit 46. The electric power from the vehicle power supply 87 is input to the power supply circuit 51 via the external connection cable 85, the external connection connector 70, the power supply line 73 a constituting the transmission line 73, and the filter circuit 54.

  As shown in FIGS. 2 and 3, the outer casing 60 has a substantially rectangular parallelepiped shape, and a portion corresponding to one surface has an opening 69, which is recessed in the direction of the opposing surface, and this recessed space is stored. A chamber 63 is formed. The outer casing 60 includes an outer casing main body 61 formed of an insulating resin and a conductive shield layer 62 applied to the entire inner peripheral surface. Yes. An external connection connector 70 is provided on the outer peripheral surface of the outer peripheral wall of the outer casing 60, and an internal circuit connection connector 75 is provided on the inner peripheral surface of the bottom wall 64 of the outer casing 60. The bottom wall 64 is provided with a breathing valve intake 90. The connector pin 71 of the external connection connector 70 and the connector pin 76 of the internal circuit connection connector 75 are connected by a transmission line 73. The transmission line 73 passes from the connector pin 71 of the external connection connector 70 through the outer peripheral wall of the outer casing main body 61 and further through the bottom wall 64 of the outer casing main body 61 to the connector of the internal circuit connection connector 75. Connected to pin 76. Here, the outer casing main body 61 is formed of an insulating resin, but this is mainly for ensuring insulation between the transmission line 73 and the shield layer 62, and therefore has an insulating coating. When covering the transmission line 73 with a material, the outer casing main body 61 may be formed of a conductive wire material. Therefore, the entire outer casing 60 may be formed of a conductive metal, and the transmission line 73 covered with the covering material may be passed through the outer casing 60. Further, the transmission line 73 may be provided along the outer peripheral surface of the outer casing main body 61 or may be provided along the inner peripheral surface of the outer casing main body 61. Good.

  As shown in FIG. 7, the breathing valve 90 includes a valve main body 91 in which a through hole is formed, and a valve lid in which a plurality of minute vent holes are formed in order to suppress dust and dust from entering the through hole. 92 and a waterproof breathing membrane 93 provided around the middle of the through hole. The waterproof breathing membrane 93 is a membrane in which a large number of air holes finer than water molecules are formed, that is, a membrane that allows air to pass but does not allow water to pass. For this reason, the internal-external pressure difference of the outer housing | casing 60 does not arise.

  As shown in FIGS. 2 to 4, the interface board 30, the signal processing circuit board 40, the power supply circuit board 50, and these boards 30, 40, 50 are supported in the storage chamber 63 of the outer casing 60 described above. A substrate support base 80 is accommodated. Each of the substrates 30, 40, 50 has a GND potential layer 32, 42, 52 made of a conductive material, and two insulating layers 33 a, 33 b, sandwiching the GND potential layers 32, 42, 52 from both sides, 43a, 43b, 53a, 53b and various circuits formed on the insulating layers 33a, 33b, 43a, 43b, 53a, 53b. The substrate support base 80 is formed of a conductive metal, and a support plate portion 81 placed on the inner peripheral surface of the bottom wall 64 of the outer housing 60 and a substrate formed at substantially four corners of the support plate portion 81. , And a cylindrical shield part 83 formed substantially at the center of the support plate part 81. A substantially central portion of the support plate portion 81 penetrates, and a cylindrical shield portion 83 is formed along the inner edge of the through hole. The substrate connecting rods 82, 82,... Pass through each of the substrates 30, 40, 50, and a spacer 85 is disposed between the substrates.

  The interface circuit 31 described above is formed on the insulating layers 33 a and 33 b of the interface substrate 30, the signal processing circuit 41 is formed on the insulating layers 43 a and 43 b of the signal processing circuit substrate 40, and the insulating layer of the power supply circuit substrate 50 is formed. In 53a and 53b, a power supply circuit 51 and a filter circuit 54 are formed, and an angular velocity sensor 55 is provided. As shown in FIG. 5, the filter circuit 54 is formed on the insulating layer 53 a far from the bottom wall 64 of the outer casing 60, of the two insulating layers 53 a and 53 b of the power circuit board 50. Yes. The filter circuit 54 is provided with a transmission pin 78 penetrating through the insulating layer 53a, the GND layer 52, and the other insulating layer 53b.

  The board support 80 to which the power circuit board 50, the signal processing circuit board 40, and the interface board 30 are attached is housed in the housing chamber 63 of the outer housing 60 as described above. In this process, as shown in FIGS. 4 and 5, the transmission pin 78 of the power circuit board 50 is connected to the connector pin 76 of the internal circuit connection connector 75 of the outer casing 60 via the relay connector 77. As a result, the connector pin 71 of the external connection connector 70 and the transmission pin 78 of the power supply circuit board 50 are connected via the transmission line 73, the connector pin 76 of the internal circuit connection connector 75, and the relay connector 77. As described above, in this embodiment, the transmission pins 78 as the connectors are provided on the circuit board 50 and the internal circuit connection connector 75 is provided on the outer casing 60, so that the circuit board 50 is accommodated in the outer casing 60. The transmission line 73 that has passed through the outer casing 60 and the circuit board 50 can be electrically connected easily. Further, since the circuit board 50 is provided with the transmission pin 78 as a connector, the operation test of each circuit including the circuit board 50 can be easily performed without storing the circuit board 50 in the outer casing 60. it can.

  In this embodiment, the transmission line located between the shield layer 62 of the outer casing 60 and the GND layer 52 of the power circuit board 50, that is, the connector pin 76 of the internal circuit connector 75, the relay connector 77, and The front end portion of the transmission pin 78 of the power supply circuit board 50 is covered with a cylindrical shield portion 83 of the board support base 80, and both end sides thereof are the shield layer 62 of the outer casing 60 and the GND layer of the power supply circuit board 50, respectively. 52. Further, the transmission line 73 between the external connection connector 70 and the internal circuit connection connector 75 is located on the outer peripheral side of the shield layer 62 of the outer casing 60 as described above. That is, in this embodiment, the transmission lines 73, 76, 77, 78 that connect the external connection connector 70 and the power supply circuit board 50 are at all portions of the shield layer 62 of the outer casing 60 and the board support base 80. Various circuits are electromagnetically partitioned by the shield portion 83 and the like. Further, the transmission lines 76, 77, 78 extending from the internal circuit connector 75 to the power circuit board 50 are connected to the filter circuit 54 provided immediately after passing through the GND layer 52 of the power circuit board 50. Therefore, even if electromagnetic noise is generated from the transmission line from the external connector 70 to the power supply circuit board 50, the electromagnetic noise is generated by a conductor such as the shield layer 62 of the outer casing or the cylindrical shield portion 83. In addition to being shielded, the filter circuit 54 is provided immediately after the transmission line goes out of the GND layer 52 of the power supply circuit board 50, so that the influence of electromagnetic noise on the various circuits 51, 41, and 31 can be suppressed. Here, since the insulating layer 53b is interposed between the GND layer 52 and the shield portion 83 of the power supply circuit board 50, there is a gap between the conductive materials. In addition, since the gap corresponding to the thickness of the insulating layer 53b is less than half the wavelength of the signal passing through the transmission line, electromagnetic noise does not leak from this gap. In the present embodiment, the filter circuit 54 is provided at a position immediately after the transmission line passes through the GND layer 52 of the power supply circuit board 50. However, the filter circuit 54 may be provided at a position immediately before passing through the GND layer 52. Similar effects can be obtained. Here, the position immediately after penetrating the GND layer 52 or the position immediately before penetrating is the distance from the GND layer 52 without any other processing circuit between the GND layer 52 and the filter circuit 54. It is a position that is made as short as possible.

  Further, in the present embodiment, the external connection connector 70 is provided at an arbitrary position of the outer casing 60 by adjusting the length of the transmission line 73 and the route of the transmission line 73 that stretches the outer peripheral side of the shield layer 62 of the outer casing 60. be able to. In addition, since the transmission line 73 passes through the outer casing body 61 on the outer peripheral side of the shield layer 62, the storage chamber 63 of the outer casing 60 is not narrowed by the transmission line 73, and the inner casing 60. The storage chamber 63 can be used effectively.

  The opening 69 of the outer casing 60 is closed by the antenna support base 23 as shown in FIG. The antenna support base 23 includes a support base body 24a in which a storage chamber is formed, and a lid 24b that closes an opening of the support base body 24a. Both the support base body 24a and the lid 24b are made of a conductive metal. A high frequency circuit board 20 is provided in the storage chamber of the support base body 24a. The high-frequency circuit board 20 includes an insulating layer 22 and the above-described high-frequency circuit 21 formed on the insulating layer 22. The high-frequency circuit 21 and other circuits such as the interface circuit 30 and the power supply circuit 50 are electrically connected by through-type connector pins 79 extending from the high-frequency circuit 21. Transmitting and receiving antennas 11, 12a, 12b are provided on the outer peripheral surface of the portion corresponding to the bottom wall of the storage chamber of the support base body 24a. The transmitting / receiving antennas 11, 12 a and 12 b are covered with a radome 65. The radome 65 is connected to the outer housing 60 by a fixing plate 66 and screws 67 via an O-ring 68. The radome 65 is made of a resin that has a very small radio wave attenuation rate when radio waves are transmitted. Here, the antenna support base 23 is made of all conductive metal. However, for example, a basic shape is formed of an insulating resin, and the outer periphery thereof is covered with conductive metal or the like. It may be.

  As shown in FIG. 4, the conductive antenna support 23, the GND layer 32 of the interface circuit board 30, the GND layer 42 of the signal processing circuit board 40, and the GND layer 52 of the power circuit board 50 are all conductive. Is electrically connected to the shield layer 62 of the outer casing 60 having Specifically, as shown in FIG. 7, the antenna support base 23 is electrically connected to the shield layer 62 by directly contacting the shield layer 62 at the edge of the opening 69 of the outer housing 60. The GND layer 32 of the interface circuit board 30, the GND layer 42 of the signal processing circuit board 40, and the GND layer 52 of the power circuit board 50 are connected to the board connecting rod 82 of the board support base 80 as shown in FIGS. 4 and 6. In contact with the shield layer 62, the support plate portion 81 of the substrate support base 80 on which the substrate connecting rod 82 is formed contacts the shield layer 62 of the outer casing 60, thereby being electrically connected to the shield layer 62. Accordingly, the GND layers 32, 42, 52 of the circuit boards 30, 40, 50 all have the same potential (GND potential).

  The transmitting antenna 11 for transmitting high-frequency radio waves and the receiving antennas 12a and 12b for receiving high-frequency radio waves are electromagnetically cut off from other circuits 21, 31, 41, 51 by an antenna support base 23 having conductivity. Therefore, the magnetic influence by these antennas can be avoided for each circuit. Further, as described above, the high frequency circuit 21 is covered with the antenna support base 23 having conductivity, and the circuit between the GND layer 32 of the interface circuit board 30 and the antenna support base 23 is connected to the GND of the interface circuit board 30. The circuit between the GND layer 32 of the interface circuit board 30 and the GND layer 42 of the signal processing circuit board 40 is covered with the layer 32, the antenna support base 23, and the shield layer 62 of the outer casing 60. The GND layer 32 of the signal processing circuit board 40, the GND layer 42 of the signal processing circuit board 40, and the shield layer 62 of the outer housing 60, and between the GND layer 42 of the signal processing circuit board 40 and the GND layer 52 of the power supply circuit board 50. The circuit is covered with a GND layer 42 of the signal processing circuit board 40, a GND layer 52 of the power circuit board 50, and a shield layer 62 of the outer casing 60. Runode, it is possible to suppress the magnetic influence between the circuit mutually very efficiently and effectively.

  In the above embodiment, the signal line and the power line including the power line are handled as the transmission line and this is magnetically shielded. However, the present invention is not limited to this, only the signal line, Only the power supply line may be magnetically shielded as in the present embodiment.

  In the above embodiment, the external connection portion is an example of an external connection connector. However, this external connection connector is not provided, and the external connection cable is provided as an external connection portion directly on the outer housing. The transmission line from this cable may be magnetically shielded as in this embodiment.

  Moreover, although the above embodiment applies this invention to a vehicle-mounted radar apparatus, this invention is not limited to this, If it is a vehicle-mounted apparatus which handles transmission objects, such as a signal and electric power, The present invention may be applied to any device, for example, a car navigation device, an ETC (Electronic Toll Collection) device, or the like.

1 is a circuit block diagram of an in-vehicle radar device according to an embodiment of the present invention. 1 is an exploded cross-sectional view of an in-vehicle radar device according to an embodiment of the present invention. It is a disassembled perspective view of the vehicle-mounted radar apparatus in one Embodiment which concerns on this invention. It is explanatory drawing which shows the connection of the electrically-conductive materials of the vehicle-mounted radar apparatus in one Embodiment which concerns on this invention. It is explanatory drawing which shows the connection of the power circuit board and transmission line in one Embodiment which concerns on this invention. It is sectional drawing at the time of accommodating the power supply circuit board and board | substrate support stand in one Embodiment which concerns on this invention in an outer housing | casing. It is sectional drawing (an internal circuit is abbreviate | omitted) of the vehicle-mounted radar apparatus in one Embodiment which concerns on this invention. It is explanatory drawing which shows the attachment position of the vehicle-mounted radar apparatus in one Embodiment which concerns on this invention. It is explanatory drawing which shows the principle of the distance measurement and speed measurement by the vehicle-mounted radar apparatus in one Embodiment which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle-mounted radar apparatus, 2 ... Own vehicle, 5 ... Object, 11 ... Transmission antenna, 12a, 12b ... Reception antenna, 20 ... High frequency circuit board, 21 ... High frequency circuit, 22, 33a, 33b, 43a, 43b, 53a , 53b ... insulating layer, 30 ... interface circuit board, 31 ... interface circuit, 32, 42, 52 ... GND layer (conductive layer of the board), 40 ... signal processing circuit board, 41 ... signal processing circuit, 50 ... power circuit board (Internal circuit board), 51 ... power supply circuit, 54 ... filter circuit (noise removing means), 60 ... outer casing, 61 ... outer casing main body, 62 ... shield layer, 70 ... external connection connector (external connection section), 73 ... Transmission line, 75 ... Internal circuit connector, 77 ... Relay connector, 80 ... Board support, 83 ... Shield part, 85 ... External connection cable.

Claims (9)

In an in-vehicle signal processing apparatus that is mounted on a vehicle and receives and / or transmits a transmission target including a signal and / or electric power with the outside,
An internal circuit for inputting the transmission target and / or outputting the transmission target;
An outer housing that covers the internal circuit and is provided with a conductive shield layer on the inner periphery side;
In order to send and receive the transmission object to and from the outside, an external connection part attached to the outer case and facing the outside of the outer case,
A transmission line for electrically connecting the internal circuit and the external connection part;
With
The transmission line has a direction in which the inner peripheral surface of the outer casing spreads between the outer peripheral surface of the outer casing and the shield layer, or the outer peripheral surface of the outer casing, starting from the external connection portion. Is extended in the direction in which it extends, penetrates through the shield layer, and is connected to the internal circuit,
An in-vehicle signal processing device characterized by the above. The in-vehicle signal processing device according to claim 1,
An internal circuit board having the internal circuit;
A board support that is arranged in the outer casing and supports the internal circuit board;
With
The substrate support has a cylindrical shield portion that covers an outer periphery of the transmission line between the penetration position of the shield layer by the transmission line and the internal circuit board, and is formed of a conductive material,
The internal circuit board is in contact with the cylindrical shield portion and closes an end opening of the cylindrical shield portion;
The internal circuit board has a conductive layer and noise removing means for removing noise that has passed through the transmission line, and the noise removing means is immediately before the transmission line from the shield layer penetrates the conductive layer. Or provided immediately after,
An in-vehicle signal processing device characterized by the above. In an in-vehicle signal processing apparatus that is mounted on a vehicle and receives and / or transmits a transmission target including a signal and / or electric power with the outside,
An internal circuit board having an internal circuit for inputting and / or outputting the transmission object;
A board support for supporting the internal circuit board;
An outer casing that covers the internal circuit board and the board support, and is provided with a conductive shield layer on the inner periphery;
In order to send and receive the transmission object to and from the outside, a transmission line that penetrates the shield layer from the outer peripheral side to the inner peripheral side and is electrically connected to the internal circuit,
With
The substrate support has a cylindrical shield portion that covers an outer periphery of the transmission line between the penetration position of the shield layer by the transmission line and the internal circuit board, and is formed of a conductive material,
The internal circuit board is in contact with the cylindrical shield portion and closes an end opening of the cylindrical shield portion;
The internal circuit board has a conductive layer and noise removing means for removing noise that has passed through the transmission line, and the noise removing means is immediately before the transmission line from the shield layer penetrates the conductive layer. Or provided immediately after,
An in-vehicle signal processing device characterized by the above. The in-vehicle signal processing device according to any one of claims 2 and 3,
The conductive layer of the internal circuit board forms a ground layer of the internal circuit and is electrically connected to the shield layer of the outer casing.
An in-vehicle signal processing device characterized by the above. The in-vehicle signal processing device according to any one of claims 2 to 4,
The conductive layer of the internal circuit board and the shield part of the substrate support are in contact with no gap, or even if there is a gap, the length is less than half the wavelength of the signal to be used.
An in-vehicle signal processing device characterized by the above. In the vehicle signal processing apparatus according to any one of claims 2 to 5,
In the cylindrical shield portion, at least one connector for connecting transmission lines to each other is provided.
An in-vehicle signal processing device characterized by the above. The in-vehicle signal processing device according to any one of claims 2 to 6,
The outer casing is formed with a penetrating portion penetrating from the outer peripheral side to the inner peripheral side,
Dust intrusion deterring means in which a large number of holes are formed to prevent dust and dust from entering, and water intrusion deterring means in which a large number of minute holes are formed to prevent water molecules from entering. A breathing valve is provided in the penetrating portion,
An in-vehicle signal processing device characterized by the above. The in-vehicle signal processing device according to any one of claims 2 to 7,
A transmitting antenna that emits radio waves,
A receiving antenna for receiving radio waves,
A high-frequency circuit that transmits a transmission signal to the transmission antenna and receives a reception signal from the reception antenna;
A high frequency related circuit board having a high frequency related circuit for transmitting and / or receiving a signal or power to and from the high frequency circuit;
Covering the high-frequency circuit, mounting the transmission antenna and the reception antenna on the outer peripheral surface, and electrically conductive material to electromagnetically shield the high-frequency related circuit board, the high-frequency circuit, the transmission antenna and the reception antenna, respectively. An antenna support formed with
An on-vehicle radar device comprising: The in-vehicle radar device according to claim 8,
The high-frequency related circuit board has a circuit board as the internal circuit board and another circuit board,
The other circuit board has a conductive layer as a ground layer,
The circuit existing between the conductive layer of the internal circuit board and the conductive layer of the other circuit board includes a conductive layer of the internal circuit board, a conductive layer of the other circuit, and the shield layer of the outer casing. Covered by
The circuit existing between the conductive layer of the other circuit board and the antenna support base is covered with the conductive layer of the other circuit board, the antenna support base, and the shield layer of the outer casing,
The conductive material of the antenna support base, the conductive layer of the other circuit board, and the conductive layer of the internal circuit board are electrically connected.
An on-vehicle radar device.

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