Vehicle test system, cable for vehicle test system, and vehicle test method

Abstract

The invention provides a vehicle test system, a cable for the vehicle test system, and a vehicle test method. A vehicle test system (100) for testing a specimen (X), which is a vehicle or a part of the vehicle, includes: a test unit (10) provided on one of an inside and an outside of the specimen (X); a control means (20) that is provided to the other of the inside and outside of the specimen (X) and that controls the test means (10); a cable (30) connecting the test unit (10) and the control unit (20) and having a shield layer (43) for blocking noise; and a leakage detection circuit (50) connected to the shield layer (43).

Description

Technical Field

[0001] The present invention relates to a vehicle test system, a cable for a vehicle test system, and a vehicle test method. Background Art

[0002] As a conventional vehicle test system, as shown in Patent Document 1, there is a system in which an autonomous driving robot is provided inside a vehicle, and a power source for supplying power to the autonomous driving robot is provided outside the vehicle.

[0003] The autonomous driving robot and the power source are connected by a cable passing through an open door or window. For example, for the purpose of safely controlling the autonomous driving robot, etc., a shielding layer for blocking noise is provided around the conductors of the cable.

[0004] However, if testing is to be performed with the vehicle's doors and windows closed, for example, testing using the air conditioner, etc., there is a problem of leakage occurring when the above-mentioned cable is pinched by the doors and windows and the covering of the conductors is damaged.

[0005] In addition, such problems are not limited to testing using an autonomous driving robot. For example, in the case of testing using an in-vehicle exhaust gas testing device, etc., where a test unit is arranged on one of the inside and outside of the vehicle and a control unit for controlling the test unit is arranged on the other of the inside and outside of the vehicle, the same problem will occur.

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2016-18748 Summary of the Invention

[0007] Therefore, the present invention has been completed to solve the above problems, and its object is to be able to detect leakage occurring in a cable in a structure in which units respectively provided inside and outside a vehicle are connected by the cable.

[0008] That is, the vehicle test system of the present invention tests a test subject, which is a vehicle or a part of the vehicle, and includes: a test unit arranged on one of the inside and outside of the test subject; a control unit arranged on the other of the inside and outside of the test subject, controlling the test unit; a cable connecting the test unit and the control unit and having a shielding layer for blocking noise; and a leakage detection circuit connected to the shielding layer.

[0009] According to the vehicle test system configured as described above, since the leakage detection circuit is connected to the shielding layer of the cable, in the case where the covering of the conductor is damaged and leakage occurs in the shielding layer, this situation can be detected, and the safety of the test, etc., can be ensured.

[0010] Preferably, the cable has a flat portion formed by arranging a plurality of wirings in a columnar shape. In this way, it is easy for the cable to pass through the gaps of the door and window, which helps with the tests conducted when closing the door and window.

[0011] Leakage to the shielding layer occurs due to the contact between the wire for electric current flow and the shielding layer. Therefore, in order to reduce the risk of such leakage, preferably, the wiring has multiple wires, and the shielding layer covers the multiple wires together. In this way, compared with the structure where a shielding layer is provided for each individual wire, the contactable parts between the shielding layer and the wires are fewer, and the risk of leakage can be reduced.

[0012] As an embodiment that significantly exhibits the effects of the present invention, the following way can be cited: The cable passes through the gap of the window or the gap of the door of the test object, and connects the test unit and the control unit. In this way, it helps with tests in a state where the doors and windows of the vehicle are closed, such as tests using an air conditioner.

[0013] As a specific way of the test unit, the following way can be cited: It has an actuator for operating the air conditioner of the test object. If it is such a structure, then the test can be carried out while conditioning the air inside the test object.

[0014] As a specific way of the cable, the following can be cited: A cable for supplying power from the control unit to the test unit and / or a cable for transmitting signals between the control unit and the test unit.

[0015] As a more specific embodiment, the following way can be cited: It is an autonomous driving robot for operating the accelerator, brake, clutch, and / or shift lever of the test object. The vehicle test system further includes: a chassis dynamometer on which the vehicle is mounted; and a control device for controlling the chassis dynamometer.

[0016] As the test unit, an in-vehicle exhaust analysis device for measuring the concentration of a predetermined component contained in the exhaust discharged from the test object can be cited.

[0017] In addition, the cable for a vehicle test system of the present invention is used in a vehicle test system for testing a test object, where the test object is a vehicle or a part of the vehicle. Among them, the cable for a vehicle test system connects a test unit and a control unit, and has a shielding layer for blocking noise. The test unit is provided on one of the inside and outside of the test object, and the control unit is provided on the other of the inside and outside of the test object to control the test unit. The cable for a vehicle test system includes a leakage detection circuit connected to the shielding layer.

[0018] Furthermore, the vehicle testing method of the present invention tests a test object, where the test object is a vehicle or a part of the vehicle. Among them, a test unit and a control unit are connected by a cable. The test unit is disposed on one of the inside and outside of the test object, and the control unit is disposed on the other of the inside and outside of the test object. The test unit is controlled, and a leakage detection circuit connected to a shielding layer for blocking noise provided in the cable is used to detect leakage to the shielding layer.

[0019] According to these cables for vehicle testing systems and the vehicle testing method, similar to the above-mentioned vehicle testing system, in the case of cable breakage and leakage, this situation can be detected.

[0020] In addition, as an embodiment of the test that significantly exhibits this effect, a method of performing the test in a state where an openable and closable part of the test object is closed can be cited.

[0021] According to the present invention configured as described above, in a structure where units respectively provided inside and outside a vehicle are connected by a cable, leakage to a shielding layer provided in the cable can be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram showing the overall structure of a vehicle testing system according to an embodiment of the present invention. Figure 2 It is a schematic diagram showing the structure of a test unit according to the same embodiment. Figure 3 It is a schematic diagram showing the structure of a cable according to the same embodiment. Figure 4 It is a schematic diagram showing the structure of a cable according to the same embodiment. Figure 5 It is a schematic diagram showing the internal structure of a wiring according to the same embodiment. Figure 6 It is a flowchart showing the vehicle testing method according to the same embodiment. Figure 7 It is a schematic diagram showing the overall structure of a vehicle testing system according to another embodiment. Figure 8 It is a top view schematically showing the structure of a flat part of a cable according to another embodiment. Figure 9 It is a cross-sectional view schematically showing the structure of a cable according to another embodiment. Figure 10 It is a schematic diagram showing the overall structure of a vehicle testing system according to another embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Hereinafter, with reference to the accompanying drawings, an embodiment of the vehicle test system of the present invention will be described.

[0024] As Figure 1 shown, the vehicle test system 100 of the present embodiment tests a test object X that is a vehicle or a part of the vehicle. Specifically, it includes: a test unit 10 to be tested; a control unit 20 that controls the test unit 10; and a cable 30 that connects the test unit 10 and the control unit 20.

[0025] In addition, hereinafter, the entire vehicle (hereinafter referred to as vehicle X) is used as the test object X, but the test object that is a part of vehicle X can also be, for example, a drive system engine or motor that constitutes vehicle X.

[0026] Furthermore, as Figure 1 shown, the vehicle test system 100 of the present embodiment further includes a chassis dynamometer D on which the vehicle is mounted and a control device Z that controls the chassis dynamometer D. However, the vehicle test system 100 can also include a powertrain dynamometer connected to the drive system that is a part of vehicle X. In addition, the control device Z can also be a device that controls the operation of the test unit 10 described later.

[0027] The test unit 10 is provided on one of the inside and outside of the vehicle X and operates using electric power supplied from the outside.

[0028] As Figure 1 shown, the test unit 10 of the present embodiment is provided inside the vehicle X, is supplied with electric power from the control unit 20 described later, and operates based on a control signal from the control unit 20.

[0029] More specifically, as Figure 2 shown, the test unit 10 is an autonomous driving robot that operates at least one or all of the accelerator, brake, clutch, shifter, and starter switch of the vehicle X. The test unit 10 receives, for example, a control signal representing various operation information such as accelerator pedal opening, brake pedal force, clutch operation information, shift lever operation information, and / or steering operation amount, and causes one or more actuators 11 to operate.

[0030] In addition, in the present embodiment, the above-mentioned test unit 10 or a test unit different from the test unit 10 includes an actuator (not shown) for operating the air conditioner of the vehicle X.

[0031] The actuator for operating the air conditioner receives a control signal from the control unit 20 described later and switches the operation / stop of the air conditioner provided in the test object X. However, the vehicle test system 100 does not necessarily have to include an actuator for operating the air conditioner, and the presence or absence of the actuator for operating the air conditioner can be appropriately changed.

[0032] As Figure 1 shown, the control unit 20 is provided on the other side of the inside and outside of the vehicle X, in other words, on the side where the test unit 10 is not provided among the inside and outside of the vehicle X, and is arranged separately from the test unit 10 inside and outside the vehicle X.

[0033] The control unit 20 supplies power to the test unit 10 and drives at least a part of the test unit 10 using this power.

[0034] As Figure 1 shown, the control unit 20 of the present embodiment includes: a power supply 21 that supplies power to the test unit 10; and a computer as the control unit main body 22 that outputs a control signal corresponding to, for example, a pre-input test condition to the test unit 10.

[0035] As Figure 1 shown, one end portion 30a of the cable 30 is connected to the test unit 10, and the other end portion 30b is connected to the control unit 20, thereby electrically connecting the test unit 10 and the control unit 20.

[0036] The cable 30 is used for testing in a state where the inside of the vehicle X is enclosed, for example, testing while air-conditioning the inside of the vehicle X using an air conditioner, etc., and is arranged to cross the inside and outside of the vehicle X through a gap of an openable / closable part X1 such as a door, window, or trunk of the vehicle X.

[0037] In addition, the concept of the "state where the inside of the vehicle X is enclosed" as mentioned here not only includes a state where the openable / closable parts X1 such as doors, windows, or trunks are completely closed, but also includes a state where the openable / closable part X1 is slightly opened, the cable 30 passes through this gap, and the remaining part of this gap is blocked by a blocking member such as a weatherstrip. That is, in a state where the inside of the vehicle X is enclosed, the cable 30 passes through the above-mentioned gap.

[0038] As Figure 3 shown, the cable 30 of the present embodiment has a circular portion 31 on the control unit 20 side, a flat portion 32 on the test unit 10 side, and a cable conversion portion 33 between them.

[0039] If described more specifically, as Figure 4 shown, the circular portion 31 is formed by bundling a plurality of wirings 4 to have a circular cross-section, and as Figure 5 shown, the flat portion 32 is formed by arranging the plurality of wirings 4 constituting the circular portion 31 in a columnar shape.

[0040] Moreover, as Figure 1 shown, the circular portion 31 and the flat portion 32 are connected here by the cable conversion portion 33 arranged outside the vehicle X. That is, in the present embodiment, as thisFigure 1 As shown in the figure, when looking from the outside to the inside of the vehicle X, a control unit 20, a circular portion 31, a cable conversion portion 33, a flat portion 32, and a test unit 10 are arranged in sequence. The flat portion 32 passes through the gap of the opening / closing portion X1 in the blocked state.

[0041] As Figure 3 shown in the figure, one end of the circular portion 31 is connected to the control unit 20, and the other end is connected to the cable conversion portion 33 by means of a first connector C1.

[0042] On the other hand, as Figure 3 shown in the figure, one end of the flat portion 32 is connected to the cable conversion portion 33, and the other end is connected to the test unit 10 by means of a second connector C2. In addition, in the present embodiment, the other end of the flat portion 32 is formed into a circular shape by bundling a plurality of wirings 4. Thus, the first connector C1 and the second connector C2 use connectors having a common structure here (that is, the same connector). However, the first connector C1 and the second connector C2 may also be connectors having different structures from each other.

[0043] As the flat portion 32, as Figure 3 shown in the figure, there are provided: a power supply flat portion 32(A) that supplies power from the control unit 20 to the test unit 10; and a control flat portion 32(B) that transmits signals between the control unit 20 and the test unit 10.

[0044] Specifically, the power supply flat portion 32(A) is composed of a plurality of wirings 4 for supplying power from the control unit 20 to the test unit 10, and the control flat portion 32(B) is composed of a plurality of wirings 4 for transmitting signals between the control unit 20 and the test unit 10.

[0045] That is, in the present embodiment, one circular portion 31 is converted into two flat portions 32 by means of the cable conversion portion 33.

[0046] Here, if the power supply flat portion 32(A) is described in detail, then as Figure 5 shown in the figure, this flat portion 32 is a flat portion formed by arranging a plurality of wirings 4 in a columnar shape, and the thickness dimension is sufficiently small compared to the width dimension.

[0047] For example, the thickness dimension of the flat portion 32 is one-tenth or less of the width dimension, here it is one-twentieth or less, and for example, the thickness dimension is in the range of 3 mm or more and 10 mm or less.

[0048] The plurality of wirings 4 supply power to a motor included in the test unit 10, specifically, as Figure 5As shown, it has: multiple wires 41 for current flow; an insulating layer 42 covering these wires 41; and a shielding layer 43 surrounding the insulating layer 42. Additionally, a flexible member 44 such as cotton yarn for making the wiring 4 flexible is interposed between the insulating layer 42 and the shielding layer 43.

[0049] The multiple wires 41 are centrally arranged in the central part of the cable 30. In this embodiment, they are wires for three-phase alternating current corresponding to the U-phase, V-phase, and W-phase respectively. However, the wire 41 can also be a wire for single-phase alternating current.

[0050] The insulating layer 42 covers the entire wire 41 and is used to insulate the wire 41 from the surroundings and is made of, for example, resin or the like. The insulating layer 42 is provided corresponding to each of the multiple wires 41. In other words, each of the multiple wires 41 is covered by a different insulating layer 42.

[0051] The shielding layer 43 is used to block the noise generated by the current flowing in the wire 41 and is used here to prevent the leakage of noise to the outside of the cable 30. Additionally, the shielding layer 43 provided on the control flat part 32(B) is used to prevent noise from entering the cable 30 from the outside. The shielding layer 43 is, for example, a conductive layer such as copper and covers the multiple wires 41 here.

[0052] In the above structure, if the insulating layer 42 covering the wire 41 is damaged and the wire 41 comes into contact with the shielding layer 43, leakage current will occur from the wire 41 to the shielding layer 43.

[0053] Therefore, as Figure 3 shown, the cable 30 of this embodiment is provided with a leakage detection circuit 50 connected to the above-mentioned shielding layer 43.

[0054] This leakage detection circuit 50 is electrically connected to the shielding layer 43 and detects the current flowing in the shielding layer 43. As an example of the specific structure of the leakage detection circuit 50, it may also have: a detection circuit that uses a resistance element to detect current; a comparison circuit that compares the detected current with a predetermined threshold; and a detection and holding circuit such as a latch circuit that holds the detected leakage. However, the specific structure of the leakage detection circuit 50 is not limited to this and can be appropriately changed.

[0055] This leakage detection circuit 50 is configured to detect the current flowing in the shielding layer 43 and is housed in the housing forming the above-mentioned cable conversion part 33 in this embodiment. However, the arrangement of the leakage detection circuit 50 can be appropriately changed.

[0056] In this embodiment, the cable 30 is composed of a plurality of wirings 4, and a shielding layer 43 is provided for the plurality of wirings 4. However, a shielding layer 43 may also be provided for each of the plurality of wirings 4. In this case, the leakage detection circuit 50 is configured to be connected to the shielding layers 43 of the respective plurality of wirings 4 to detect the leakage of each shielding layer 43.

[0057] That is, the leakage detection circuit 50 of the present embodiment is connected to the wiring 4 for supplying power from the control unit 20 to the test unit 10 and the wiring 4 for transmitting signals between the control unit 20 and the test unit 10, and detects the leakage of the shielding layer 43 provided on these wirings 4.

[0058] However, the leakage detection circuit 50 may also be connected only to the wiring 4 for supplying power from the control unit 20 to the test unit 10 to detect the leakage of the shielding layer 43 provided on these wirings 4. In addition, the leakage detection circuit 50 may also be connected only to the wiring 4 for transmitting signals between the control unit 20 and the test unit 10 to detect the leakage of the shielding layer 43 provided on these wirings 4.

[0059] Hereinafter, as an example of a vehicle test using the present invention, a method of a vehicle test in a state where the air conditioner of the vehicle is operating will be described with reference to Figure 6 the flowchart of.

[0060] First, when the performance test of vehicle X starts, the inside of vehicle X is enclosed (S1). In this embodiment, the actuator for operating the air conditioner receives a control signal from the control unit 20 to operate the air conditioner. At this time, the flat portion 32 of the cable 30 passes through the opening / closing portion X1, and the opening / closing portion X1 is closed. Alternatively, the operation of the air conditioner may be manually performed by an operator.

[0061] Next, the test unit 10 operates the accelerator, brake, clutch, and / or shifter of vehicle X, drives vehicle X on the chassis dynamometer D, and starts the vehicle test (S2).

[0062] Then, the leakage detection circuit 50 measures the current flowing in the shielding layer 43 and compares the measured current value with a predetermined threshold value (S3).

[0063] In S2, when the measured current value exceeds the threshold value, the leakage detection circuit 50 determines that leakage has occurred in the shielding layer 43 and outputs a leakage detection signal indicating this situation (S4).

[0064] For example, the leakage detection signal is output to the above-mentioned control unit 20. When the control unit 20 obtains the leakage detection signal, for example, the operation of the test unit 10 is stopped and / or the power supply to the test unit 10 is stopped (S5).

[0065] On the other hand, in S2, when the measured current value does not exceed the threshold value, the leakage detection circuit 50 repeats the comparison in S2 until the vehicle test ends.

[0066] In the vehicle test system 100 configured as described above, since the leakage detection circuit 50 is connected to the shielding layer 43 of the cable 30, in the case where the insulating layer 42 covering the conductor 41 is damaged and leakage occurs in the shielding layer 43, this situation can be detected, and the safety of the test can be ensured.

[0067] In addition, since the cable 30 has a flat portion 32 formed by arranging a plurality of wirings 4 in a columnar shape, it is easy to pass the cable through the gaps of doors and windows, which helps the test carried out with the doors and windows closed.

[0068] Furthermore, since the shielding layer 43 covers a plurality of conductors 41 together, compared with the structure in which a shielding layer 43 is provided for each individual conductor 41, the contactable parts between the shielding layer 43 and the conductors 41 are fewer, the risk of leakage can be reduced, and on this basis, the thickness of each wiring 4 can be reduced, making it easy to pass through the gaps of windows and doors.

[0069] In addition, the present invention is not limited to the above-described embodiments.

[0070] For example, in the above-described embodiment, the test unit 10 is described by taking an autonomous driving robot as an example, but as long as it is a test unit for testing the performance of the test object X such as an in-vehicle exhaust gas analysis device, it can be various test units.

[0071] In addition, in the above-described embodiment, the test unit 10 is arranged inside the vehicle X, and the control unit 20 is arranged outside the vehicle X, but it can also be the opposite configuration, as Figure 7 shown. For example, a test unit 10 such as an in-vehicle exhaust gas analysis device is arranged on a mounting member installed outside the vehicle (test object) X, and the control unit 20 for controlling the test unit 10 is arranged inside the vehicle X. The in-vehicle exhaust gas analysis device is mounted on the traveling vehicle X and measures the concentration of a predetermined component contained in the exhaust gas of the vehicle X. The predetermined component is CO, CO2, NOx, THC, NH3, PM (Particle Matter), and / or PN (Particle number), etc.

[0072] Furthermore, in the above-described embodiment, the cable conversion part 33 is arranged outside the vehicle X, but it can also be arranged inside the vehicle X. That is, the test unit 10, the circular part 31, the cable conversion part 33, the flat part 32, and the control unit 20 can also be arranged in sequence from the inside of the vehicle X to the outside. Even in such a configuration, the flat part 32 can pass through the opening / closing part X1.

[0073] On this basis, the cable 30 does not necessarily have to have the circular portion 31, and may also be entirely composed of the flat portion 32. In this case, the cable conversion portion 33 can be dispensed with, and the leakage detection circuit 50 can also be provided in the test unit 10 or the control unit 20, for example. Furthermore, the cable 30 does not necessarily have to have the flat portion 32, and may also be entirely composed of the circular portion 31.

[0074] The power supply flat portion 32(A) and the control flat portion 32(B) of the cable 30 in the above-described embodiment are separated, but the power supply flat portion 32(A) and the control flat portion 32(B) may also be provided integrally. In this case, the cable 30 can be a cable that converts the circular portion 31 into a single flat portion 32. However, from the viewpoint of suppressing the influence of the noise generated in the power supply flat portion 32(A) on the control flat portion 32(B), it is preferable that the power supply flat portion 32(A) and the control flat portion 32(B) are separated as in the above-described embodiment.

[0075] In addition, the cable 30 may also have a single wire 41. Furthermore, the cable 30 may also be a cable in which a plurality of wires 41 are respectively covered by different shielding layers 43.

[0076] Moreover, in the above-described embodiment, the cable 30 supplies power to the test unit 10 and exchanges control signals between the test unit 10 and the control unit 20, but it may also be used only for power supply or only for the exchange of control signals.

[0077] In addition, the leakage detection circuit 50 may also be configured to notify the situation when leakage to the shielding layer 43 is detected.

[0078] The flat portion 32 of the cable 30 described above is fixed by fusing a plurality of wirings 4, etc., but in such a flat portion 32, there is a possibility that the fused portion peels off during use and the plurality of wirings 4 come apart. In this case, it is sometimes difficult to close the window and door because the separated plurality of wirings 4 overlap each other. In addition, if the window and door are forcibly closed in this state, there is a possibility of causing an open circuit or a short circuit between lines, and as a result, leakage may occur. Therefore, as Figure 8 shown, the cable 30 of other embodiments may also include a bundling member 34 that bundles the plurality of mutually fused wirings 4 constituting the flat portion 32 so as not to come apart during use. The bundling member 34 of this embodiment is composed of a heat-shrinkable tube that shrinks by heating. Preferably, the bundling member 34 is installed at the end of the flat portion 32 where the fused portion is likely to peel off (where cracking is likely to start), and more preferably at the end on the connector C2 side. In this way, it is possible to prevent the peeling of the fused portion during the use of the flat portion 32.

[0079] In addition, when installing such a belt member 34, it is preferable that the belt member 34 is installed on the flat portion 32 by means of a reinforcing member 35 that is more rigid than the flat portion 32. The reinforcing member 35 prevents the flat portion 32 from becoming round when the belt member 34 is installed, and is made of, for example, a resin such as bakelite (phenolic resin) or polyurethane foam, or metal. As Figure 9 shown, the cross-section of the reinforcing member 35 has a shape extending along the upper surface and the lower surface of the flat portion 32. The reinforcing member 35 may be provided only on either one of the upper surface and the lower surface of the flat portion 32, or may be provided on both sides. In addition, the surface shape of the reinforcing member 35 may also be formed to be substantially the same as the surface shape of the flat portion 32 (specifically, the surface shape of the plurality of wirings 4 to be bundled) with which it contacts.

[0080] In addition, as Figure 10 shown, the vehicle test system 100 of other embodiments can also be used to test a vehicle (test subject) X of a type in which the storage compartment is independent of the passenger compartment (for example, a type such as a sedan in which the storage compartment cannot be accessed from the passenger compartment). In this case, as Figure 10 shown, the test unit 10 can be mounted on the storage compartment LR of the vehicle X, the control unit 20 can be mounted on the passenger compartment CR (for example, the rear seat) of the vehicle X, and the cable 30 can be arranged to pass through the gap between the two opening / closing portions X1 (specifically, the storage compartment door and the passenger compartment door). That is, in this case, the passenger compartment CR of the test subject X corresponds to the "inside of the test subject" as described in the present invention, and the storage compartment LR that cannot be accessed from the passenger compartment CR corresponds to the "outside of the test subject" as described in the present invention.

[0081] In addition to the above, the present invention is not limited to the above-described embodiments, and various modifications can of course be made without departing from the gist thereof. Industrial Applicability

[0082] According to the vehicle test system of the present invention described above, in a structure in which units respectively provided inside and outside the vehicle are connected by a cable, leakage current occurring in the cable can be detected. Explanation of Reference Numerals

[0083] 100 Vehicle test system X Test subject X1 Opening / closing portion 10 Test unit 11 Actuator 20 Control unit 21 Power supply 22 Computer 30 Cable 30a One end portion 30b The other end portion 31 Circular part 32 Flat part 33 Cable conversion part C1 First connector C2 Second connector 4 Wiring 41 Conductive wire 42 Insulation layer 43 Shielding layer 44 Flexible part 50 Leakage detection circuit.

Claims

1. A vehicle test system for testing a test subject, where the test subject is a vehicle or a part of the vehicle, and it includes: A test unit disposed on one of the inside and outside of the test subject; A control unit disposed on the other of the inside and outside of the test subject to control the test unit; A cable connecting the test unit and the control unit and having a shielding layer for blocking noise; And A leakage detection circuit connected to the shielding layer.

2. The vehicle test system according to claim 1, wherein The cable has a flat portion formed by arranging multiple wirings in a columnar shape.

3. The vehicle test system according to claim 2, wherein The wiring has multiple wires, and the shielding layer covers the multiple wires together.

4. The vehicle test system according to any one of claims 1 to 3, wherein The cable passes through the gap of a window or a door of the test subject to connect the test unit and the control unit.

5. The vehicle test system according to any one of claims 1 to 4, wherein The test unit has an actuator for operating the air conditioner of the test subject.

6. The vehicle test system according to any one of claims 1 to 5, wherein The cable supplies power from the control unit to the test unit.

7. The vehicle test system according to any one of claims 1 to 6, wherein The cable transmits signals between the control unit and the test unit.

8. The vehicle test system according to any one of claims 1 to 7, wherein The test unit is an autonomous driving robot that operates the accelerator, brake, clutch, and / or shifter of the test subject, The vehicle test system further includes: A chassis dynamometer on which the vehicle is mounted; and A control device for controlling the chassis dynamometer.

9. The vehicle test system according to any one of claims 1 to 7, wherein The test unit is an in-vehicle exhaust analysis device for measuring the concentration of a predetermined component contained in the exhaust discharged from the test subject.

10. A cable for a vehicle test system used in a vehicle test system for testing a test subject, where the test subject is a vehicle or a part of the vehicle, and The cable for the vehicle test system connects a test unit and a control unit and has a shielding layer for blocking noise. The test unit is disposed on one of the inside and outside of the test subject, and the control unit is disposed on the other of the inside and outside of the test subject to control the test unit, The cable for the vehicle test system includes a leakage detection circuit connected to the shielding layer.

11. A vehicle test method for testing a test subject, where the test subject is a vehicle or a part of the vehicle, and A test unit and a control unit are connected by a cable. The test unit is disposed on one of the inside and outside of the test subject, and the control unit is disposed on the other of the inside and outside of the test subject to control the test unit, Using a leakage detection circuit connected to a shielding layer for blocking noise provided in the cable, leakage to the shielding layer is detected.

12. The vehicle testing method according to claim 11, wherein Testing is performed in a state where an openable / closable opening / closing part of the test object is closed.

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