Continuity tester and continuity test method

Abstract

To provide a continuity tester and continuity test method, capable of distinguishing circuits having same wire species, etc., even though the circuits are adjacent to each other to test continuity in non-contact.SOLUTION: A continuity tester 1 for testing continuity in non-contact to a wire harness WH including a plurality of wires having a terminal attached to the end and connectors C having the inserted terminals of the plurality of wires includes: a laser transmitter 10 for irradiating each terminal inserted into the connector C with a laser beam at different timings; an infrared camera 50 capable of imaging an opposite end being an end on the side opposite to an end on the attachment side of each terminal in the plurality of wires; and a tester 70 for determining that the circuit is in a continuity state when confirmed that a temperature in the opposite end of the wire having each attached terminal rises by a temperature equal to or more than a predetermined temperature by the infrared camera 50 when irradiating each terminal with the laser beam.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a continuity test device and a continuity test method. [Background technology]

[0002] Conventionally, a continuity inspection device and a continuity inspection method have been proposed that perform non-contact continuity inspection by irradiating electromagnetic waves to the electric wires that make up a wire harness so that resonance occurs in the electric wires and measuring the temperature of the electric wires non-contact with an infrared sensor (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6554354 Summary of the Invention [Problem to be solved by the invention]

[0004] The resonant frequency of an electric wire is a value that depends on the length, shape, etc. Therefore, the continuity inspection device and continuity inspection method described in Patent Document 1 irradiates electromagnetic waves so as to cause resonance in a specific circuit of a wire harness, and can determine whether a continuity abnormality such as a break has occurred in each circuit based on the temperature rise that occurs in each circuit.

[0005] However, with the continuity inspection device and continuity inspection method described in Patent Document 1, when multiple circuits with the same wire type (material and wire diameter) or wire length are present in close proximity, the resonance frequencies of these circuits become the same, making it difficult to distinguish between them and perform a continuity inspection.

[0006] The present invention has been made to solve these conventional problems, and its purpose is to provide a continuity inspection device and a continuity inspection method that can distinguish between circuits and perform non-contact continuity inspections, even if circuits of the same wire type, etc. are close to each other. [Means for solving the problem]

[0007] The continuity testing device of the present invention is a continuity testing device that performs a non-contact continuity test on a wire harness that includes a plurality of electric wires with terminals attached to their ends and a connector into which each terminal of the plurality of electric wires is inserted, and is equipped with an irradiation means that irradiates each terminal inserted into the connector with laser light at different times, an infrared camera that can capture images of the opposite ends of the plurality of electric wires that are opposite the ends to which each terminal is attached, and an inspection means that determines that the corresponding circuit is in a conductive state when the infrared camera confirms that the temperature at the opposite ends of the electric wires to which each terminal is attached has risen by more than a predetermined temperature when the irradiation means irradiates each terminal with laser light.

[0008] Furthermore, the continuity testing device according to the present invention is a continuity testing device that performs a non-contact continuity test on a wire harness that includes a plurality of electric wires having terminals attached to their ends and a connector into which the terminals of the plurality of electric wires are inserted, and is equipped with an irradiation means that irradiates each terminal inserted into the connector with laser light at different timings, an infrared camera that can capture images of the opposite ends of the plurality of electric wires that are opposite the ends to which each terminal is attached, and a display means that displays based on image information obtained by imaging with the infrared camera and that distinguishes between cases where the temperature at the opposite ends of the electric wires to which each terminal is attached rises by more than a predetermined temperature when the irradiation means irradiates each terminal with laser light and cases where this does not happen.

[0009] Furthermore, the continuity inspection method according to the present invention is a continuity inspection method for conducting a non-contact continuity inspection on a wire harness including a plurality of electric wires each having a terminal attached to an end thereof and a connector into which the terminals of the plurality of electric wires are inserted, and includes an irradiation step of irradiating each terminal inserted into the connector with laser light at different timings; an imaging step of using an infrared camera to image the opposite end of each of the plurality of electric wires, which is the end opposite to the end to which each terminal is attached; and an inspection step of determining that the circuit in question is in a conductive state if it is confirmed from the image obtained in the imaging step that the temperature at the opposite end of the electric wire to which each terminal is attached has risen by more than a predetermined temperature when the laser light is irradiated onto each terminal in the irradiation step.

[0010] Furthermore, the continuity inspection method according to the present invention is a continuity inspection method for conducting a non-contact continuity inspection on a wire harness including a plurality of electric wires each having a terminal attached to an end thereof and a connector into which the terminals of the plurality of electric wires are inserted, and includes an irradiation step of irradiating each terminal inserted into the connector with laser light at different timings; an imaging step of imaging, with an infrared camera, the opposite end of each of the plurality of electric wires, which is the end opposite to the end to which each terminal is attached; and a display step of performing a display based on image information obtained by imaging in the imaging step, and displaying a distinguishable display between a case where the temperature at the opposite end of the electric wire to which each terminal is attached rises by a predetermined temperature or more when the laser light is irradiated onto each terminal in the irradiation step and a case where the temperature at the opposite end of the electric wire to which each terminal is attached rises by a predetermined temperature or more ... when the laser light is irradiated onto each terminal in the irradiation step. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a continuity testing device and a continuity testing method that can distinguish between circuits and perform non-contact continuity testing, even if circuits of the same wire type, etc. are close to each other. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view showing a continuity test device according to a first embodiment of the present invention. [Figure 2]2A and 2B are enlarged views of a portion of the wire harness shown in FIG. 1, in which (a) is a perspective view of the rear side of a connector, and (b) is a front view of the connector. [Figure 3] 1A to 1C are process diagrams illustrating a continuity inspection method according to a first embodiment. [Figure 4] FIG. 10 is a perspective view showing a continuity test device according to a second embodiment. [Figure 5] FIG. 10 is a perspective view showing a continuity test device according to a third embodiment. [Figure 6] 10A to 10C are process diagrams illustrating a continuity inspection method according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention will be described below in accordance with preferred embodiments. Note that the present invention is not limited to the embodiments shown below and can be modified as appropriate without departing from the spirit of the present invention. In addition, in the embodiments shown below, some components are omitted from illustration and description, but it goes without saying that publicly known or well-known technologies are applied as appropriate to the details of the omitted technologies within the scope of the content described below.

[0014] Fig. 1 is a perspective view showing a continuity test device according to a first embodiment of the present invention. As shown in Fig. 1, the continuity test device 1 is used to test the continuity of a wire harness WH for a vehicle that is routed on a jig plate B. The wire harness WH has connectors C at each end.

[0015] 2A and 2B are enlarged views of a portion of the wire harness WH shown in FIG. 1, where (a) is a rear perspective view of a connector C and (b) is a front view of the connector C. As shown in FIG. 2A, the wire harness WH is formed by bundling a plurality of electric wires W. A metal terminal T as shown in FIG. 2B is attached to the end of each electric wire W. The terminal T attached to each of the plurality of electric wires W is inserted into one of the connectors C shown in FIG. 1.

[0016] 1, the opening (end face) of the connector C, which is the side to be connected to the mating connector, faces perpendicularly to the jig plate B. An fθ lens 30 (described later) and the like are provided on the perpendicular side.

[0017] The continuity inspection device 1 includes a laser oscillator (irradiation means) 10, a galvanometer scanner (irradiation means) 20, an fθ lens (irradiation means) 30, an XYZ stage 40, an infrared camera 50, a camera (acquisition means) 60, and an inspection device (inspection means) 70.

[0018] The laser transmitter 10, galvanometer scanner 20, and fθ lens 30 are used to irradiate laser light at different timings to each terminal T inserted into the connector C. The laser transmitter 10 generates laser light and supplies it to the galvanometer scanner 20 via an optical fiber or the like. The galvanometer scanner 20 is a device that can scan the laser focal point, and the fθ lens 30 can scan the laser focal point on the XY plane (a plane parallel to the jig plate B).

[0019] As shown in FIG. 2(b), the laser light is irradiated so that the laser focal point LP is located on the terminal T. The laser light is also scanned so that the laser focal point LP is located on other terminals T. As a result, the laser light is irradiated to each terminal T at different timings.

[0020] Here, for a single-mode laser, the focused beam diameter D0 can be simply calculated using the formula D0 = 4λf / πD, where λ is the laser wavelength, f is the lens focal length, and D is the diameter of the incident beam. For example, if the laser wavelength λ is 1.07 μm, the lens focal length f is 100 mm, and the incident beam diameter D is 5 mm, the focused beam diameter D0 will be 27.25 μm, which can be narrowed down to 30 μm or less. This makes it possible to selectively irradiate only a specific terminal T from the opening of the connector C with laser light.

[0021] Referring again to Figure 1, the XYZ stage 40 is used to move the laser oscillator 10, the galvanometer scanner 20, the fθ lens 30, etc. in three dimensions. This XYZ stage 40 also makes it possible to irradiate the terminal T of another connector C with laser light.

[0022] The infrared camera 50 captures an image of the opposite end of each of the electric wires W, which is the end opposite to the attachment end of the terminal T irradiated with the laser light, using light in the infrared wavelength range. Information about the captured image is supplied to the inspection device 70. In this embodiment, it is assumed that a terminal T is also connected to the opposite end, and therefore the infrared camera 50 captures an image of the terminal T at the opposite end that is paired with the terminal T irradiated with the laser light. For this reason, it is preferable that the infrared camera 50 is also movable in the same manner as the XYZ stage 40. Furthermore, the opposite end is not limited to a strict end such as the terminal T, and may be any portion where a temperature rise can be detected, such as the crimped portion between the electric wire W and the terminal T, as described below.

[0023] The camera 60 captures an image of each terminal T in the connector C from, for example, an end face of the connector C. The camera 60 is positioned with its angle of view and optical axis set so that information about the shape and position of each terminal T can be acquired. Note that the continuity test device 1 according to this embodiment is not limited to being equipped with the camera 60, and may also be equipped with a laser microscope capable of performing positioning using laser confocal or white light interference, as long as it can acquire information about the shape and position of each terminal T inserted into the connector C. In this case, it is preferable that the optical path be switchable so that the laser light from the laser transmitter 10 can be supplied to the laser microscope. Information about the captured image and the acquired information about the shape and position of each terminal T is supplied to the test device 70.

[0024] The inspection device 70 performs a continuity test on the wire harness WH. The inspection device 70 includes a continuity determination unit 71 and a terminal determination unit (terminal determination means) 72.

[0025] The continuity determination unit 71 performs a continuity test on the wire harness WH based on information on the captured image from the infrared camera 50. The continuity determination unit 71 determines, based on information on the captured image from the infrared camera 50, whether the temperature at the opposite end of the electric wire W to which each terminal T is attached has risen by a predetermined temperature or more when the laser light is irradiated onto each terminal T. If the continuity determination unit 71 determines that the temperature has risen by the predetermined temperature or more, it determines that the corresponding circuit including the terminal T irradiated with the laser light and the electric wire W to which the terminal T is attached is in a conductive state. On the other hand, if the continuity determination unit 71 determines that the temperature has not risen by the predetermined temperature or more, it determines that the corresponding circuit is in a non-conductive state.

[0026] Here, the terminal T irradiated with the laser light generates heat. The heat is conducted through the conductor of the electric wire W. Therefore, the area near the opposite end of the electric wire W to which the terminal T is attached shows a temperature rise corresponding to the laser output, etc. On the other hand, if the electric wire W has a break or short circuit, or if the terminal T is not attached properly in the first place, the area near the opposite end will not show a temperature rise corresponding to the laser output, etc.

[0027] Specifically, the laser output is 100 W, the irradiation time is 1 second, the conductor material of the electric wire W is copper, the wire length of the electric wire W is 1 m, and the conductor cross-sectional area of ​​the electric wire W is 0.519 mm 2 Let's assume that the density of copper is 8.96 g / cm 3 The specific heat is 385J / kg℃. The conductor volume of the electric wire W is 519mm 3 This gives a conductor weight of 4.65g. If the laser light energy absorption rate is 5%, a temperature rise of approximately 2.79°C can be expected at the opposite end. Note that heat loss due to heat radiation and heat conduction to the coating is not taken into account.

[0028] Here, since the resolution of commercially available infrared cameras 50 is about 0.05°C, the continuity determination unit 71 can determine whether or not a continuity state exists based on a temperature rise by setting the predetermined temperature to, for example, 2.0°C. Note that it is preferable to vary the predetermined temperature based on the conductor type and wire length of the electric wire W. Furthermore, the continuity inspection device 1 according to this embodiment can perform inspection in a shorter time by changing the laser output and irradiation time.

[0029] The terminal determination unit 72 determines whether each terminal T is in a predetermined normal state based on information about the shape and position of each terminal T acquired by the camera 60, etc. In other words, the terminal determination unit 72 determines whether the terminal T is physically deformed or damaged.

[0030] Here, if the terminal T is deformed or otherwise damaged but properly irradiated with laser light, it is determined to be in a conductive state when the temperature rises above a predetermined temperature. However, if the terminal T is deformed or otherwise damaged, it may not be possible to achieve continuity when connecting it to the mating connector. Therefore, by determining whether the shape and position of each terminal T are in a predetermined normal state, the accuracy of the continuity test can be improved.

[0031] Next, a continuity inspection method according to this embodiment will be described. Fig. 3 is a process diagram showing the continuity inspection method according to the first embodiment. First, the continuity inspection device 1 drives the XYZ stage 40 to move the galvanometer scanner 20 and the fθ lens 30 to positions facing the end face of a specific connector C (moving process: S1).

[0032] Next, the laser oscillator 10 generates a laser beam, and the laser beam is irradiated onto the terminal T inserted into the connector C through the galvano scanner 20 and the fθ lens 30 (irradiation step: S2).

[0033] Next, the infrared camera 50 captures an image of the terminal T at the opposite end of the electric wire W connected to the terminal T irradiated with the laser light (image capturing step: S3). Next, the camera 60 captures an image of the terminal T inserted into the connector C, thereby acquiring information on the shape and position of the terminal T (acquisition step: S4).

[0034] Thereafter, an inspection is performed by the inspection device 70 (inspection step: S5). In this step, the continuity determination unit 71 determines whether there is a temperature rise of a predetermined temperature or more at the opposite end of the circuit in question, based on information about the image captured by the infrared camera 50 in the imaging step. Furthermore, in this step, the terminal determination unit 72 determines whether the shape and position of the terminal T are in a predetermined normal state, based on information about the shape and position of the terminal T acquired in the acquisition step. If a temperature rise of a predetermined temperature or more is confirmed and the terminal T is in a normal state, the inspection device 70 determines that the circuit in question is in a conductive state. On the other hand, if a temperature rise of a predetermined temperature or more is not confirmed or the terminal T is not in a normal state, the inspection device 70 determines that the circuit in question is in a non-conductive state.

[0035] Thereafter, the inspection device 70 determines whether the laser light has been irradiated onto all the terminals T (S6). If the laser light has not been irradiated onto all the terminals T (S6: NO), the process proceeds to step S1. If the laser light has been irradiated onto all the terminals T (S6: YES), the continuity inspection ends.

[0036] In step S6, it is determined whether the laser beam has been irradiated to all the terminals T. However, since it has been confirmed whether the electric wire W to which the terminal T irradiated with the laser beam is connected is in a conductive state, it is not necessary to irradiate the terminal T at the opposite end of this electric wire W with the laser beam.

[0037] In this way, the continuity inspection device 1 and continuity inspection method according to this embodiment irradiate each terminal T inserted into the connector C with a laser beam at different times. The continuity inspection device 1 and continuity inspection method then image the opposite end with an infrared camera 50 and determine that the corresponding circuit is in a conductive state if a temperature rise of a predetermined temperature or more is confirmed. In this way, by irradiating each terminal T with a laser beam, the continuity inspection device 1 and continuity inspection method according to this embodiment can individually determine the temperature rise of each circuit and inspect whether it is in a conductive state, even if circuits of the same type of electric wire are located close to each other. Therefore, even if circuits of the same type of electric wire are located close to each other, it is possible to distinguish between each circuit and perform a non-contact continuity inspection.

[0038] Furthermore, the continuity inspection device 1 and the continuity inspection method according to this embodiment irradiate each terminal T with laser light from the end face of the connector C that is the connection side with the mating connector. Therefore, there is no need to form a separate hole or the like in the connector C for irradiating each terminal T with laser light, and laser light irradiation can be performed more easily.

[0039] Furthermore, the continuity test device 1 and continuity test method according to this embodiment determine whether the shape and position of each terminal T are in a predetermined normal state. Here, if the terminal T is deformed or otherwise, but is properly irradiated with laser light, the corresponding circuit is determined to be in a conductive state due to a temperature rise above a predetermined temperature. However, if the terminal T is deformed or otherwise, continuity may not be achieved when connected to the mating connector. Therefore, by determining whether the shape and position of each terminal are in a predetermined normal state, the accuracy of the continuity test can be improved.

[0040] Next, a second embodiment of the present invention will be described. The continuity inspection device and continuity inspection method according to the second embodiment are similar to those of the first embodiment, but some of the configurations and steps are different. The differences from the first embodiment will be described below.

[0041] Fig. 4 is a perspective view showing a continuity inspection device according to the second embodiment. As shown in Fig. 4, the position, angle of view, optical axis, etc. of the continuity inspection device 2 according to the second embodiment are set so that the infrared camera 50 can capture an image of the entire wire harness WH.

[0042] Furthermore, the continuity test device 2 according to the second embodiment includes a short-circuit determination unit 73 in the test device 70. When it is confirmed that the temperature of a circuit other than the relevant circuit has risen by a specified temperature or more based on image information from the infrared camera 50 when irradiating each terminal T with laser light, the short-circuit determination unit 73 determines that a short circuit to another circuit has occurred.

[0043] For example, if a short circuit occurs between electric wires W, the temperature also rises in other circuits including the other short-circuited electric wires W. Therefore, when it is confirmed that the temperature in the other circuits has risen by more than a specified value, the short-circuit determination unit 73 determines that a short circuit to the other circuits has occurred.

[0044] Here, if a short circuit occurs between the electric wires W, the temperature rise in the corresponding circuit will be low. Therefore, the short circuit determination unit 73 may determine that a short circuit to another electric wire W has occurred when the continuity determination unit 71 does not confirm a temperature rise of a predetermined temperature or more in the corresponding circuit, and when it confirms that a temperature rise of a predetermined temperature or more in another circuit has occurred. Alternatively, the short circuit determination unit 73 may determine that a short circuit to another electric wire W has occurred when the continuity determination unit 71 confirms a temperature rise of a predetermined temperature or more but is not an expected temperature rise (a temperature rise of a second predetermined temperature or more), and when it confirms that a temperature rise of a predetermined temperature or more in another circuit has occurred.

[0045] The continuity test method according to the second embodiment is the same as that according to the first embodiment. In the continuity test method according to the second embodiment, the short-circuit determination unit 73 also determines whether or not there is a short circuit in the test step (S5) shown in FIG.

[0046] In this way, according to the continuity test device 2 and continuity test method of the second embodiment, as in the first embodiment, even if circuits of the same wire type are close to each other, it is possible to distinguish between the circuits and perform a non-contact continuity test. Also, there is no need to form a separate irradiation hole or the like in the connector C in order to irradiate each terminal T with laser light, making it possible to irradiate the laser light more easily. Also, by determining whether the shape and position of each terminal are in a predetermined normal state, the accuracy of the continuity test can be improved.

[0047] Furthermore, according to the second embodiment, if it is confirmed that the temperature of a circuit other than the relevant circuit has risen by more than a specified value when the laser beam is irradiated onto each terminal T, it is determined that a short circuit to that circuit has occurred. In this way, it is possible to determine that a short circuit has occurred when the temperature of a circuit other than the relevant circuit rises, thereby further improving the accuracy of the continuity test.

[0048] Next, a third embodiment of the present invention will be described. The continuity inspection device and continuity inspection method according to the third embodiment are similar to those of the first embodiment, but some of the configurations and steps are different. The differences from the first embodiment will be described below.

[0049] 5 is a perspective view showing a continuity inspection device 3 according to a third embodiment. As shown in FIG. 5, the continuity inspection device 3 according to the third embodiment includes a monitor (display means) 80 instead of the inspection device 70.

[0050] The monitor 80 displays information based on the image captured by the infrared camera 50. In particular, the monitor 80 displays information in a manner that allows distinction between when the temperature at the opposite end of the electric wire W to which each terminal T is attached rises above a predetermined temperature and when it does not rise above a predetermined temperature when the laser light is irradiated onto each terminal T.

[0051] There are no particular restrictions on the display format of the monitor 80, but it may be possible to display different colors depending on the temperature range, or it may be possible to display a specific color above a certain temperature and colorless or another color below the certain temperature.

[0052] In this way, in the third embodiment, whether or not the terminal T is in a conductive state can be determined by visual inspection using the monitor 80. Furthermore, it is preferable that the monitor 80 can also display the image from the camera 60 using screen division, time division, or the like. In this case, the irradiation state of the laser light can also be visually confirmed. Furthermore, deformation of the terminal T, etc. can be visually confirmed, to some extent, using the image from the camera 60.

[0053] Fig. 6 is a process diagram showing a continuity inspection method according to the third embodiment. As shown in Fig. 6, the continuity inspection method according to the third embodiment includes a moving step (S1), an irradiating step (S2), and an imaging step (S3) as in the first embodiment.

[0054] Thereafter, the image captured by the infrared camera 50 in the imaging step is displayed on the monitor 80 (display step: S7). The monitor 80 displays a distinguishable display between when the temperature at the opposite end of the electric wire W has risen above a predetermined temperature and when it has not. This allows the worker to visually determine whether the electric wire W is in a conductive state or a non-conductive state. Thereafter, the continuity test is completed through step S6.

[0055] In this way, the continuity test device 3 and continuity test method according to the third embodiment are provided with a monitor 80 instead of the test device 70, and the monitor 80 displays whether the temperature is above a predetermined temperature or not in a distinguishable manner. This allows a user to visually determine whether the temperature is continuity. Therefore, even if circuits of the same type of electric wire are close to each other, the users can visually distinguish between the circuits and perform a non-contact continuity test.

[0056] Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments, and modifications may be made without departing from the spirit of the present invention, and known or well-known techniques may be combined if possible. Furthermore, techniques from the embodiments may be combined.

[0057] For example, in the second embodiment, the infrared camera 50 captures an image of the entire structure, while in the first and third embodiments, the infrared camera 50 captures an image of an area smaller than the entire structure. However, the infrared camera 50 is not limited to capturing an image of either the entire structure or an area smaller than the entire structure, and one camera may be provided for capturing an image of the entire structure and another for capturing an area smaller than the entire structure. Furthermore, in the first and third embodiments, an infrared camera 50 that captures an image of the entire structure may be employed to eliminate the need to move the infrared camera 50, or multiple infrared cameras 50 may be used to capture images of opposite ends.

[0058] Furthermore, the continuity inspection devices 1 and 2 according to the first and second embodiments include an inspection device 70, and the continuity inspection device 3 according to the third embodiment includes a monitor 80. However, the configuration is not limited to one of them, and both may be included. For example, the continuity inspection devices 1 and 2 according to the first and second embodiments include a monitor 80 in addition to the inspection device 70, and a visual continuity inspection may be performed while a continuity inspection is performed with the inspection device 70, or the monitor 80 may display whether or not the irradiation position is appropriate. [Explanation of symbols]

[0059] 1-3: Continuity test device 10: Laser oscillator (irradiation means) 20: Galvano scanner (illumination means) 30: fθ lens (illumination means) 50: Infrared camera 60: Camera (acquisition method) 70: Inspection device (inspection means) 71: Continuity judgment section 72: Terminal judgment unit (terminal judgment means) 73: Short circuit judgement unit 80: Monitor (display means) C: Connector T:Terminal W: Electric wire WH: Wire harness

Claims

1. A continuity test device that performs a non-contact continuity test on a wire harness including a plurality of electric wires each having a terminal attached to an end thereof and a connector into which the terminals of the plurality of electric wires are inserted, an irradiation means for irradiating each terminal inserted into the connector with a laser beam at different timings; an infrared camera capable of capturing an image of an opposite end portion of the plurality of electric wires, which is an end portion opposite to an end portion of each terminal attached thereto; an inspection means for determining that the circuit is in a conductive state when it is confirmed by the infrared camera that the temperature at the opposite end of the electric wire to which each terminal is attached rises by a predetermined temperature or more when the irradiation means irradiates each terminal with a laser beam; A continuity inspection device comprising:

2. The irradiation means irradiates each terminal with a laser beam from an end face of the connector that is to be connected to a mating connector.

2. The continuity test device according to claim 1.

3. an acquisition means for acquiring information on the shape and position of each terminal inserted into the connector; a terminal determination means for determining whether the shape and position of each terminal acquired by the acquisition means are in a predetermined normal state; The continuity test device according to claim 1, further comprising:

4. The infrared camera captures an image of the entire wire harness including the opposite end, When it is confirmed that the temperature of a circuit other than the circuit in question has risen by a specified temperature or more when the laser beam is irradiated onto each terminal of the irradiation means, the inspection means determines that a short circuit to the other circuit has occurred.

2. The continuity test device according to claim 1.

5. A continuity test device that performs a non-contact continuity test on a wire harness including a plurality of electric wires each having a terminal attached to an end thereof and a connector into which the terminals of the plurality of electric wires are inserted, an irradiation means for irradiating each terminal inserted into the connector with a laser beam at different timings; an infrared camera capable of capturing an image of an opposite end portion of the plurality of electric wires, which is an end portion opposite to an end portion of each terminal attached thereto; a display means for displaying information based on image information obtained by the infrared camera, and for distinguishably displaying whether or not the temperature at the opposite end of the electric wire to which each terminal is attached rises above a predetermined temperature when the laser beam is irradiated onto each terminal by the irradiation means; A continuity inspection device comprising:

6. A continuity inspection method for conducting a non-contact continuity inspection on a wire harness including a plurality of electric wires each having a terminal attached to an end thereof and a connector into which the terminals of the plurality of electric wires are inserted, comprising: an irradiation step of irradiating each terminal inserted into the connector with a laser beam at different timings; an imaging step of imaging an opposite end portion of each of the plurality of electric wires, which is an end portion opposite to an end portion of each of the plurality of electric wires on which the terminals are attached, using an infrared camera; an inspection step of determining that the circuit is in a conductive state when it is confirmed that the temperature at the opposite end of the electric wire to which each terminal is attached has risen by a predetermined temperature or more in the image obtained in the imaging step when the laser light is irradiated onto each terminal in the irradiation step; A continuity inspection method comprising:

7. A continuity inspection method for conducting a non-contact continuity inspection on a wire harness including a plurality of electric wires each having a terminal attached to an end thereof and a connector into which the terminals of the plurality of electric wires are inserted, comprising: an irradiation step of irradiating each terminal inserted into the connector with a laser beam at different timings; an imaging step of imaging an opposite end portion of each of the plurality of electric wires, which is an end portion opposite to an end portion of each of the plurality of electric wires on which the terminals are attached, using an infrared camera; a display step of performing a display based on image information obtained by imaging in the imaging step, and of distinguishably displaying whether or not the temperature at the opposite end of the electric wire to which each terminal is attached has risen by a predetermined temperature or more when the laser light is irradiated onto each terminal in the irradiation step; A continuity inspection method comprising:

Images