JP6347702B2 - Inspection apparatus and inspection method - Google Patents

Description

  The present invention relates to an inspection apparatus and an inspection method for inspecting whether or not each terminal is erroneously connected in a capacitor mounted on a mounting target.

  As this type of inspection apparatus, there is known a polarity discrimination apparatus disclosed by the applicant in Patent Document 1 below. This polarity discriminating apparatus is configured to be able to discriminate the polarities of the two lead terminals of the electrolytic capacitor mounted on the circuit board (whether or not each lead terminal is correctly connected). In this polarity discriminating device, a DC voltage is applied to each pattern (conductor pattern) on the circuit board to which each lead terminal is connected with a polarity that matches the polarity when each lead terminal is connected in a normal state. In addition, the current taken out through the probe in contact with the metal case of the electrolytic capacitor at that time is measured. Next, based on the measured current value, the polarity of each lead terminal of the electrolytic capacitor (whether or not each lead terminal is correctly connected) is determined.

Japanese Examined Patent Publication No. 4-80529 (page 3-4, Fig. 1-3)

  However, the above polarity discrimination device has the following problems to be improved. That is, in this polarity discriminating device, the current taken out via the probe in contact with the metal case of the electrolytic capacitor is measured, and the polarity of each lead terminal of the electrolytic capacitor is discriminated based on the current value. However, in recent years, in many electrolytic capacitors mounted on a substrate, the surface of the metal case has an insulating property (the surface is coated with an insulating material), so the probe is electrically connected to the metal case. You may not be able to connect to. For this reason, in the above polarity discriminating apparatus, it is difficult to discriminate the polarity of such an electrolytic capacitor, and an improvement thereof is desired.

  The present invention has been made in view of such a problem, and an inspection apparatus and an inspection method capable of inspecting whether or not each terminal of the capacitor is erroneously connected also to a capacitor having an insulating surface of the case. The main purpose is to provide.

  In order to achieve the above object, the inspection apparatus according to claim 1 includes a columnar body wound in a columnar shape in a state in which a sheet for an anode and a sheet for a cathode are overlapped with a sheet-shaped electrolyte body interposed therebetween, A capacitor having a case covering a columnar body, and a terminal for an anode and a terminal for a cathode connected to each of the sheet bodies and drawn to the outside of the case, a connected portion for an anode and a cathode in a mounting target In the state where each terminal is connected to and mounted on the connected part for use, it is possible to inspect whether there is a misconnection in which the connected part and the terminal are connected with the polarity reversed. A signal generating unit that generates a signal for inspection supplied to each sheet body via each connected portion to which each terminal is connected, and a sheet surface of each sheet body. In the opposite state An inspection electrode that can be placed, a measurement unit that measures a capacitance between any one of the sheet bodies and the inspection electrode when the inspection signal is supplied, and the measurement unit. An inspection unit for inspecting the presence or absence of the erroneous connection based on the measured value of the measured capacitance, and the inspection unit includes the inspection electrode arranged in the facing state of the signal generation unit. One of the output parts and the second output part, and one of the connected parts is connected to the other of the first output part and the second output part, and the connected parts The presence or absence of the erroneous connection is inspected based on a comparison result between the measured value measured in a state where the other of the parts is connected to the guard potential having the same potential as that of the first output unit and a prescribed value defined in advance. Perform inspection processing.

  The inspection apparatus according to claim 2 is the inspection apparatus according to claim 1, wherein the inspection unit is connected to the first output unit and the cathode is used in the inspection process. When the measured value measured in a state where the connected portion is connected to the second output portion and the connected portion for the anode is connected to the guard potential is less than the specified value, the erroneous connection is Determine that it has occurred.

  The inspection apparatus according to claim 3 is the inspection apparatus according to claim 1, wherein the inspection unit is connected to the first output unit in the inspection process, and the inspection unit is connected to the anode. When the measured value measured in a state where the connected portion is connected to the second output portion and the connected portion for the cathode is connected to the guard potential exceeds the specified value, the erroneous connection is Determine that it has occurred.

  The inspection apparatus according to claim 4 is the inspection apparatus according to claim 1, wherein the inspection unit is connected to the second output unit in the inspection process, and is used for the cathode. When the measured value measured in a state where the connected portion is connected to the first output portion and the anode connected portion is connected to the guard potential, the erroneous connection is Determine that it has occurred.

  The inspection apparatus according to claim 5 is the inspection apparatus according to claim 1, wherein the inspection unit is connected to the second output unit in the inspection process, and for the anode. When the measured value measured in a state where the connected portion is connected to the first output portion and the connected portion for the cathode is connected to the guard potential exceeds the specified value, the erroneous connection is Determine that it has occurred.

  According to a sixth aspect of the present invention, there is provided an inspection method comprising: a columnar body wound in a columnar shape in a state where a sheet for an anode and a sheet for a cathode are stacked with a sheet-shaped electrolyte body interposed therebetween; A capacitor having a case and a terminal for an anode and a terminal for a cathode connected to each of the sheet bodies and drawn out of the case is connected to an anode connected portion and a cathode connected to the mounting target. In the state where each terminal is connected and mounted on a part, the inspection method for inspecting whether or not there is a misconnection in which each connected part and each terminal are connected in a state where the polarity is reversed, The inspection electrode arranged in a facing state facing the sheet surface of each sheet body is connected to one of the first output unit and the second output unit of the signal generation unit, and one of the connected parts The above Each of the terminals connected to each other is connected to the other one of the one output unit and the second output unit, and the other connected unit is connected to the guard potential having the same potential as that of the first output unit. An inspection signal is supplied to each sheet body via a connected portion to measure the capacitance between one of the sheet bodies and the inspection electrode, and the measured capacitance is measured. The presence / absence of the erroneous connection is inspected based on a comparison result between the value and a predetermined value.

  In the inspection apparatus according to claim 1, and the inspection method according to claim 6, any one of the first output unit and the second output unit of the signal generation unit includes an inspection electrode arranged so as to face the sheet surface of each sheet body. One of the connected parts is connected to the other of the first output part and the second output part, and the other of the connected parts is set to the same guard potential as that of the first output part. In the connected state, an inspection signal is supplied to measure the capacitance between one of the sheet bodies and the inspection electrode, and the capacitor is based on the comparison result between the measured capacitance value and the specified value. Inspect whether there is any erroneous connection between each terminal and each connected part. For this reason, according to this inspection apparatus and inspection method, it is possible to inspect whether there is a misconnection without bringing the probe into contact with the capacitor case. Therefore, according to the inspection apparatus and the inspection method, it is possible to reliably inspect whether or not there is an erroneous connection between each terminal and each connected portion of the capacitor, even for a capacitor whose surface is insulative. .

  In the inspection apparatus according to claim 2, in the inspection process, the inspection electrode is connected to the first output portion, the cathode connected portion is connected to the second output portion, and the anode connected It is determined that a misconnection has occurred when a measured value measured in a state where the part is connected to the guard potential is equal to or less than a specified value. For this reason, according to this inspection apparatus, since the comparison between the measured value and the specified value is simple and a clear comparison result can be obtained, it is possible to accurately and easily surely determine whether or not a misconnection has occurred. Can be determined.

  In the inspection apparatus according to claim 3, in the inspection process, the inspection electrode is connected to the first output portion, the anode connected portion is connected to the second output portion, and the cathode connected It is determined that a misconnection has occurred when the measured value measured in a state where the part is connected to the guard potential exceeds a specified value. For this reason, according to this inspection apparatus, since the comparison between the measured value and the specified value is simple and a clear comparison result can be obtained, it is possible to accurately and easily surely determine whether or not a misconnection has occurred. Can be determined.

  In the inspection apparatus according to claim 4, in the inspection process, the inspection electrode is connected to the second output portion, the cathode connected portion is connected to the first output portion, and the anode connected It is determined that a misconnection has occurred when a measured value measured in a state where the part is connected to the guard potential is equal to or less than a specified value. For this reason, according to this inspection apparatus, since the comparison between the measured value and the specified value is simple and a clear comparison result can be obtained, it is possible to accurately and easily surely determine whether or not a misconnection has occurred. Can be determined.

  In the inspection apparatus according to claim 5, in the inspection process, the inspection electrode is connected to the second output portion, the anode connected portion is connected to the first output portion, and the cathode connected It is determined that a misconnection has occurred when the measured value measured in a state where the part is connected to the guard potential exceeds a specified value. For this reason, according to this inspection apparatus, since the comparison between the measured value and the specified value is simple and a clear comparison result can be obtained, it is possible to accurately and easily surely determine whether or not a misconnection has occurred. Can be determined.

1 is a configuration diagram showing a configuration of an inspection apparatus 1. FIG. 2 is a cross-sectional view showing configurations of a circuit board 100 and a capacitor 200. FIG. It is the perspective view which looked at capacitor 200 from cylinder 221 side. It is the perspective view which looked at capacitor 200 from the plate 222 side. 2 is an exploded perspective view of a capacitor 200. FIG. FIG. 2 is a perspective view of a state in which inspection electrodes 12 are arranged on a circuit board 100. It is the 1st explanatory view explaining an inspection method. It is the 2nd explanatory view explaining an inspection method. It is the 1st explanatory view explaining the 2nd composition and a method. It is the 2nd explanatory view explaining the 2nd composition and a method. It is the 1st explanatory view explaining the 3rd composition and a method. It is the 2nd explanatory view explaining the 3rd composition and a method. It is the 1st explanatory view explaining the 4th composition and a method. It is the 2nd explanatory view explaining the 4th composition and a method.

  Hereinafter, embodiments of an inspection apparatus and an inspection method will be described with reference to the accompanying drawings.

  First, the configuration of the inspection apparatus 1 will be described. An inspection apparatus 1 shown in FIG. 1 is an example of an inspection apparatus. For example, a capacitor 200 (see also FIGS. 3 and 4) mounted on a circuit board 100 (mounting target) shown in FIG. Anode terminal 213a (anode terminal) and cathode terminal 213b (cathode terminal: hereinafter also referred to as “terminal 213” when anode terminal 213a and cathode terminal 213b are not distinguished from each other), and anode land on circuit board 100 101a (an example of an anode connected portion) and a cathode land 101b (an example of a cathode connected portion: hereinafter, also referred to as “land 101” when the anode land 101a and the cathode land 101b are not distinguished) Is configured to be capable of inspecting whether or not there is an “incorrect connection” connected in a state where the polarity is reversed.

  Here, the capacitor 200 is an electrolytic capacitor of surface mount type (a type in which the terminal 213 is connected to the land 101 provided on the surface of the circuit board 100), and as shown in FIG. Anode aluminum foil 211a (an example of a sheet for an anode) and a cathode aluminum foil 211b (an example of a sheet for a cathode: hereinafter, when the anode aluminum foil 211a and the cathode aluminum foil 211b are not distinguished) A columnar body 210 wound in a columnar shape in a state of being superposed, a case 220 covering the columnar body 210, an anode terminal 213a connected to the anode aluminum foil 211a, and a cathode aluminum foil 211b And a cathode terminal 213b connected to the terminal. The case 220 is made of a metal (for example, aluminum) cylinder 221 whose top is closed and whose bottom is open, and non-conductive (eg, resin) fixed to the bottom of the cylinder 221. A) plate body 222. In this case, the surface of the cylindrical body 221 is coated with an insulating material and has an insulating property. Each terminal 213 passes through the bottom portion (plate body 222) of the case 220, is pulled out of the case 220, and is bent at the lower surface of the plate body 222 (see FIG. 4).

  Further, in this capacitor 200, as shown in FIGS. 5 and 7, the columnar body 210 is configured such that the cathode aluminum foil 211b is located on the outer peripheral side of the anode aluminum foil 211a. Further, as shown in FIG. 2, the capacitor 200 is exposed to the bottom of the case 220 (the lower surface of the plate 222) on the anode land 101 a and the cathode land 101 b provided on the surface of the circuit board 100. Each terminal 213 is connected and fixed by, for example, soldering, so that it is mounted on the circuit board 100.

  On the other hand, as shown in FIG. 1, the inspection apparatus 1 includes a signal generation unit 11, an inspection electrode 12, a moving mechanism 13, a measurement unit 14, a processing unit 15, and a probe 16.

  In accordance with the control of the processing unit 15, the signal generation unit 11 controls each aluminum through each probe 16 and each land 101 in contact with each land 101 to which each terminal 213 of the capacitor 200 is connected in an inspection process described later. An alternating voltage is generated as the inspection signal S supplied to the foil 211. Further, as shown in FIG. 1, the signal generation unit 11 is provided with a first output unit Op1, a second output unit Op2, and a third output unit Op3. In this case, the third output unit Op3 is set to the guard potential G at the same potential as the first output unit Op1 (specifically, the same potential as the potential of the first output unit Op1) inside the signal generation unit 11. (See the figure).

  As shown in FIG. 6, for example, the inspection electrode 12 is formed in a cylindrical shape and is configured to be disposed so as to surround the capacitor 200. In this case, in a state where the inspection electrode 12 surrounds the capacitor 200, the inner surface of the inspection electrode 12 is the sheet surface of each aluminum foil 211 constituting the columnar body 210 of the capacitor 200 (outer surface: the outer side of the columnar body 210 in FIG. 5). (This surface is also referred to as “opposing state” hereinafter).

  The moving mechanism 13 moves the pair of probes 16 according to the control of the processing unit 15, thereby bringing the probes 16 into contact with the lands 101. In addition, the moving mechanism 13 disposes the inspection electrode 12 so as to surround the capacitor 200 by moving the inspection electrode 12 according to the control of the processing unit 15.

  The measurement unit 14 performs measurement processing for measuring the capacitance C (see FIG. 7) between the inspection electrode 12 and any one of the aluminum foils 211 in the capacitor 200 according to the control of the processing unit 15. In this case, when the AC voltage as the inspection signal S is supplied to the aluminum foil 211 in the measurement process, the measuring unit 14 supplies the AC voltage to the first output unit Op1 of the signal generating unit 11 and the first output unit Op1. The test electrode connected to the first output unit Op1 is detected based on the current value, the voltage value of the AC voltage, and the phase difference between the AC voltage and the AC current. 12 and an aluminum foil 211 (any one of the aluminum foils 211) connected to the second output unit Op2 different from the first output unit Op1 are measured.

  The processing unit 15 controls the signal generation unit 11, the movement mechanism 13, and the measurement unit 14. In addition, the processing unit 15 functions as an inspection unit, and based on the measured value Cm of the capacitance C measured by the measuring unit 14, whether or not each terminal 213 in the capacitor 200 mounted on the circuit board 100 is erroneously connected. An inspection process for inspecting is executed.

  In this case, in the processing unit 15, in the inspection process, the inspection electrode 12 arranged in a facing state is the first output unit Op1 of the signal generation unit 11 (an example of one of the first output unit and the second output unit). And the cathode land 101b (an example of any one of the lands 101) is connected to the second output unit Op2 (the other of the first output unit and the second output unit) of the signal generation unit 11, and The anode land 101a (the other of the lands 101) is connected to the guard potential G (the third output unit Op3 shown in FIG. 1) set to the same potential as the first output unit Op1 of the signal generation unit 11 ( When the measured value Cm measured in FIG. 7) is equal to or less than a predetermined specified value Cr (for example, a value slightly larger than 0F), it is determined that a misconnection has occurred, and the measured value Cm is the specified value. When it exceeds Cr It determines that misconnection has not occurred.

  Next, an inspection method for inspecting whether or not each terminal 213 is erroneously connected in the capacitor 200 mounted on the circuit board 100 as shown in FIG. 2 using the inspection apparatus 1 will be described.

  First, the circuit board 100 on which the capacitor 200 to be inspected is mounted is held by a holder (not shown). Next, an operation unit (not shown) is operated to instruct the start of inspection. In response to this, the processing unit 15 controls the moving mechanism 13 to bring the pair of probes 16 into contact with the anode land 101a and the cathode land 101b, respectively. In this case, the probe 16 brought into contact with the anode land 101a is connected to the guard potential G set to the same potential as the first output unit Op1 of the signal generation unit 11, and the probe 16 brought into contact with the cathode land 101b is It is assumed that it is connected to the second output unit Op2 of the generation unit 11.

  Further, the processing unit 15 controls the moving mechanism 13 to move the inspection electrode 12 and arrange the inspection electrode 12 so as to surround the capacitor 200 as shown in FIG. In this case, the inspection electrode 12 is connected to the first output unit Op1 of the signal generation unit 11.

  Subsequently, the processing unit 15 controls the signal generation unit 11 to generate an alternating voltage as the inspection signal S. At this time, an AC voltage is supplied to the aluminum foil 211 of the capacitor 200 via each probe 16 and each land 101. Next, the processing unit 15 controls the measurement unit 14 to execute measurement processing.

  In this measurement process, the measurement unit 14 detects an alternating current flowing between the first output unit Op1 and the second output unit Op2 of the signal generation unit 11 by supplying an alternating voltage to the aluminum foil 211, and the current value and Based on the voltage value of the AC voltage and the phase difference between the AC voltage and the AC current, the test electrode 12 connected to the first output unit Op1 and the second output unit Op2 different from the first output unit Op1 are connected. The electrostatic capacitance C between the aluminum foil 211 (one of the aluminum foils 211) is measured.

  Subsequently, the processing unit 15 executes an inspection process. In this inspection process, the processing unit 15 compares the measured value Cm of the capacitance C measured by the measuring unit 14 with a predefined value Cr (for example, a value slightly larger than 0F), Based on the comparison result (whether the measured value Cm is equal to or greater than the specified value Cr), the presence or absence of erroneous connection of each terminal 213 in the capacitor 200 is inspected.

  Here, as shown in FIG. 7, the anode terminal 213a of the capacitor 200 is connected to the anode land 101a of the circuit board 100, and the cathode terminal 213b of the capacitor 200 is connected to the cathode land 101b of the circuit board 100. That is, it is assumed that each terminal 213 of the capacitor 200 is connected to each land 101 with the correct polarity (hereinafter, this connection state is also referred to as “positive connection state”). At this time, as shown in the figure, the cathode aluminum foil 211b is connected to the second output part Op2 of the signal generator 11 via the cathode terminal 213b connected to the cathode land 101b, and is connected to the anode land 101a. The anode aluminum foil 211a is connected to the guard potential G having the same potential as that of the first output unit Op1 of the signal generation unit 11 via the connected anode terminal 213a. Further, the inspection electrode 12 disposed so as to surround the capacitor 200 is connected to the first output unit Op1 of the signal generation unit 11. In FIG. 7 and FIGS. 8 to 14 to be described later, each aluminum foil 211 is schematically shown, and the case 220 (tubular body 221) is not shown.

  Further, as shown in FIG. 7, in this capacitor 200, the cathode aluminum foil 211b is located on the outermost periphery. Therefore, the cathode aluminum foil 211b connected to the second output part Op2 and the inspection electrode 12 connected to the first output part Op1 face each other without the anode aluminum foil 211a connected to the guard potential G. ing. As a result, when the inspection signal S is supplied in the positive connection state, it is connected to the second output unit Op2 by the electrostatic capacitance C between the cathode aluminum foil 211b and the inspection electrode 12, as shown in FIG. The current I flows between the cathode aluminum foil 211b and the inspection electrode 12 connected to the first output unit Op1, and the measurement unit 14 causes the cathode aluminum foil 211b (one of the aluminum foils 211 to be inspected). Capacitance between the aluminum foil 211) connected to the second output part Op2 different from the first output part Op1 connected to the electrode 12 for inspection and the inspection electrode 12 connected to the first output part Op1 C is measured.

  For this reason, when each terminal 213 is connected to each land 101 with the correct polarity, the measured value Cm of the capacitance C measured by the measuring unit 14 is the cathode aluminum foil 211b, the inspection electrode 12, It becomes a value (a value larger than 0F) according to the electrostatic capacitance C between. Therefore, when the measured value Cm exceeds a specified value Cr (for example, a value slightly larger than 0F), the processing unit 15 determines that no erroneous connection has occurred.

  On the other hand, as shown in FIG. 8, the anode terminal 213a of the capacitor 200 is connected to the cathode land 101b of the circuit board 100, and the cathode terminal 213b of the capacitor 200 is connected to the anode land 101a of the circuit board 100. It is assumed that each terminal 213 of the capacitor 200 is connected to each land 101 with a reverse polarity (a state in which the polarity is reversed) (hereinafter, this connection state is also referred to as an “incorrect connection state”). At this time, as shown in the figure, the anode aluminum foil 211a is connected to the second output part Op2 of the signal generation unit 11 via the anode terminal 213a connected to the cathode land 101b, and is connected to the anode land 101a. The cathode aluminum foil 211b is connected to the guard potential G through the connected cathode terminal 213b. Further, the inspection electrode 12 is connected to the first output unit Op <b> 1 of the signal generation unit 11.

  In this case, in this erroneous connection state, unlike the above-described normal connection state, as shown in FIG. 8, the anode aluminum foil 211a connected to the second output part Op2 and the test connected to the first output part Op1 The cathode aluminum foil 211b connected to the guard potential G of the same potential as the first output part Op1 exists between the electrode 12 (the anode aluminum foil 211a and the inspection electrode 12 are not directly opposed to each other). ). As a result, when the inspection signal S is supplied in an erroneous connection state, the guard between the anode aluminum foil 211a connected to the second output unit Op2 and the guard is caused by the capacitance between the anode aluminum foil 211a and the cathode aluminum foil 211b. A current flows between the cathode aluminum foil 211b connected to the potential G, and between the anode aluminum foil 211a and the inspection electrode 12 (between the first output unit Op1 and the second output unit Op2 of the signal generation unit 11). ) Is in a state where no current flows (or hardly flows), and the anode aluminum foil 211a (one of the aluminum foils 211 is measured by the measuring unit 14 and is connected to the inspection electrode 12). The measured value Cm of the capacitance C between the aluminum foil 211) connected to the second output part Op2 different from the first output part Op1 and the inspection electrode 12 is 0F (or almost 0F).

  For this reason, when each terminal 213 is connected to each land 101 with a reverse polarity (inverted polarity), the measured value Cm of the capacitance C measured by the measuring unit 14 is as described above. It becomes the specified value Cr or less. Therefore, the processing unit 15 determines that an erroneous connection has occurred when the measured value Cm is equal to or less than the specified value Cr.

  In this case, in this inspection apparatus 1 and the inspection method, it is possible to inspect whether there is a misconnection without bringing a probe into contact with the case 220 of the capacitor 200. Therefore, according to the inspection apparatus 1 and the inspection method, even for the capacitor 200 whose surface of the case 220 has insulation properties, each terminal 213 of the capacitor 200 and the land 101 (covered) of the circuit board 100 (mounting target). It is possible to reliably inspect whether there is an erroneous connection with the connection portion.

  Next, the processing unit 15 displays the result on a display unit (not shown) and ends the inspection process.

  As described above, in the inspection apparatus 1 and the inspection method, the inspection electrode 12 arranged to face the sheet surface of each aluminum foil 211 is connected to the first output unit Op1 (first output unit and second output unit 11) of the signal generation unit 11. One of the output sections) and the cathode land 101b (one of the lands 101) to the second output section Op2 of the signal generation section 11 (the other of the first output section and the second output section). An inspection signal S is supplied in a state in which the anode land 101a (the other of the lands 101) is connected to the guard potential G having the same potential as that of the first output unit Op1. The capacitance C between the inspection electrode 12 is measured, and erroneous connection between each terminal 213 of the capacitor 200 and each land 101 of the circuit board 100 is based on a comparison result between the measured value Cm and the specified value Cr. Presence or absence To 査. Therefore, according to the inspection apparatus 1 and the inspection method, it is possible to inspect whether there is an erroneous connection without bringing the probe into contact with the case 220 of the capacitor 200. Therefore, according to the inspection apparatus 1 and the inspection method, whether or not there is an erroneous connection between each terminal 213 of the capacitor 200 and the land 101 of the circuit board 100 even in the capacitor 200 whose surface of the case 220 has an insulating property. It can be surely inspected.

  In the inspection apparatus 1 and the inspection method, in the inspection process, the inspection electrode 12 is connected to the first output unit Op1, the cathode land 101b is connected to the second output unit Op2, and the anode land 101a is connected to the first output unit Op2. When the measured value Cm measured in the state of being connected to the guard potential G is equal to or less than the specified value Cr, it is determined that an erroneous connection has occurred. Therefore, according to the inspection apparatus 1 and the inspection method, since the comparison between the measured value Cm and the specified value Cr can be simple and clear, it is possible to accurately and easily determine whether or not a misconnection has occurred. Can be determined clearly and clearly.

  Note that the inspection apparatus, the inspection method, and the measurement target are not limited to the above-described configuration, method, and measurement target. For example, the inspection electrode 12 is connected to the first output unit Op1 of the signal generator 11, the cathode land 101b is connected to the second output unit Op2 of the signal generator 11, and the anode land 101a is connected to the guard potential G. As described above, the inspection process is performed by connecting to (the same potential as the first output unit Op1), but the inspection electrode 12 and each land 101 and each potential (the second output unit Op2, the first output unit Op1, and the guard). It is also possible to adopt a configuration and method that define the connection form with the potential G) as follows.

  First, as shown in FIG. 9, the inspection electrode 12 is connected to the first output part Op1, the anode land 101a is connected to the second output part Op2, and the cathode land 101b is connected to the guard potential G. Configurations and methods can be employed. In this case, as shown in the figure, in the positive connection state, a guard potential is present between the anode aluminum foil 211a connected to the second output part Op2 and the inspection electrode 12 connected to the first output part Op1. Since the cathode aluminum foil 211b connected to G exists, current flows between the anode aluminum foil 211a and the cathode aluminum foil 211b due to the capacitance between the anode aluminum foil 211a and the cathode aluminum foil 211b. Thus, no current flows between the anode aluminum foil 211a (second output part Op2) and the inspection electrode 12 (first output part Op1). For this reason, the measured value Cm of the electrostatic capacitance C between the anode aluminum foil 211a connected to the second output unit Op2 and the inspection electrode 12 connected to the first output unit Op1 is measured by the measuring unit 14. 0F (or almost 0F).

  On the other hand, as shown in FIG. 10, in the erroneous connection state, the cathode aluminum foil 211b connected to the second output part Op2 and the inspection electrode 12 connected to the first output part Op1 are connected to the guard potential G. The current I flows between the cathode aluminum foil 211b and the inspection electrode 12 due to the capacitance C between the cathode aluminum foil 211b and the inspection electrode 12 because the anode aluminum foil 211a is opposed to each other. The measured value Cm of the capacitance C measured by the flow measurement unit 14 becomes a value corresponding to the capacitance C between the cathode aluminum foil 211b and the inspection electrode 12. Therefore, when the measured value Cm is equal to or less than the specified value Cr, the processing unit 15 determines that no erroneous connection has occurred (in a normal connection state), and when the measured value Cm exceeds the specified value Cr, the erroneous connection is determined. Is determined to have occurred.

  As shown in FIG. 11, the inspection electrode 12 is connected to the second output part Op2, the anode land 101a is connected to the guard potential G, and the cathode land 101b is connected to the first output part Op1. Configurations and methods can be employed. In this case, as shown in the figure, in the positive connection state, the inspection electrode 12 connected to the second output unit Op2 and the cathode terminal 213b connected to the first output unit Op1 are connected to the guard potential G. The current I flows between the inspection electrode 12 and the cathode aluminum foil 211b due to the capacitance C between the cathode aluminum foil 211b and the inspection electrode 12 because they face each other without the anode aluminum foil 211a being interposed. The measured value Cm of the capacitance C measured by the flow measurement unit 14 becomes a value corresponding to the capacitance C between the cathode aluminum foil 211b and the inspection electrode 12.

  On the other hand, as shown in FIG. 12, in the erroneous connection state, the guard potential G is between the inspection electrode 12 connected to the second output part Op2 and the anode aluminum foil 211a connected to the first output part Op1. Current flows between the inspection electrode 12 and the cathode aluminum foil 211b due to the capacitance C between the inspection electrode 12 and the cathode aluminum foil 211b. Thus, no current flows between the inspection electrode 12 (second output part Op2) and the anode aluminum foil 211a (first output part Op1). Therefore, the measured value Cm between the anode aluminum foil 211a connected to the first output unit Op1 and the inspection electrode 12 connected to the second output unit Op2 measured by the measurement unit 14 is 0F (or almost) 0F). Accordingly, the processing unit 15 determines that an erroneous connection has occurred when the measured value Cm is equal to or less than the specified value Cr, and no erroneous connection has occurred when the measured value Cm exceeds the specified value Cr (correct connection). State).

  As shown in FIG. 13, the inspection electrode 12 is connected to the second output part Op2, the anode land 101a is connected to the first output part Op1, and the cathode land 101b is connected to the guard potential G. Configurations and methods can be employed. In this case, as shown in the figure, in the positive connection state, the guard potential is between the inspection electrode 12 connected to the second output part Op2 and the anode aluminum foil 211a connected to the first output part Op1. Since the cathode aluminum foil 211b connected to G exists, a current is generated between the inspection electrode 12 and the cathode aluminum foil 211b due to the capacitance C between the inspection electrode 12 and the cathode aluminum foil 211b. As a result, no current flows between the inspection electrode 12 (second output part Op2) and the anode aluminum foil 211a (first output part Op1). Therefore, the measured value Cm between the anode aluminum foil 211a connected to the first output unit Op1 and the inspection electrode 12 connected to the second output unit Op2 measured by the measurement unit 14 is 0F (or almost) 0F).

  On the other hand, as shown in FIG. 14, in the erroneous connection state, the inspection electrode 12 connected to the second output unit Op2 and the cathode terminal 213b connected to the first output unit Op1 are connected to the guard potential G. Therefore, the inspection electrode 12 (second output portion Op2) and the cathode aluminum foil 211b (the second output portion Op2) are formed by the capacitance C between the inspection electrode 12 and the cathode aluminum foil 211b. The current I flows between the first output unit Op1), and the measured value Cm of the capacitance C measured by the measuring unit 14 becomes the capacitance C between the cathode aluminum foil 211b and the inspection electrode 12. It becomes a corresponding value. Therefore, when the measured value Cm is equal to or less than the specified value Cr, the processing unit 15 determines that no erroneous connection has occurred (in a normal connection state), and when the measured value Cm exceeds the specified value Cr, the erroneous connection is determined. Is determined to have occurred.

  Also in each configuration and method in which the inspection electrode 12 and each land 101 are connected to each potential and the inspection process is performed in each connection form described above, whether or not there is an erroneous connection without bringing the probe into contact with the case 220 of the capacitor 200 Therefore, the capacitor 200 whose surface of the case 220 has an insulating property can be reliably inspected for the presence of erroneous connection between the terminals 213 of the capacitor 200 and the land 101 of the circuit board 100. Can do.

  Moreover, although the example using the cylindrical inspection electrode 12 has been described above, the shape of the inspection electrode 12 is not limited to a cylindrical shape. For example, it is also possible to employ a configuration and method using an inspection electrode having a cylindrical shape with a polygonal cross section, or an inspection electrode having a vertically divided shape (a bowl shape). Moreover, the structure and method which use a plate-shaped test | inspection electrode are also employable.

  In addition, as a comparison result between the measured value Cm and the specified value Cr, the example in which it is determined that a misconnection has occurred when the measured value Cm is equal to or less than the specified value Cr (or when the specified value Cr is exceeded) has been described above. For example, it is also possible to employ a configuration and method for determining that a misconnection has occurred when the ratio of the measured value Cm to the specified value Cr is equal to or greater than (or less than) a predetermined value.

  In addition, although the example in which the capacitor 200 whose surface of the case 220 has insulation is described as an inspection target, the capacitor 200 whose surface of the case 220 does not have insulation is also similar to the above example. It is possible to inspect whether there is a connection error.

  Further, although an example in which an AC voltage is used as the inspection signal S has been described above, a configuration and a method in which a DC signal (for example, a DC constant current) is used as the inspection signal S can also be adopted. In this case, in the configuration using a DC constant current, for example, a DC constant current is supplied to one of the aluminum foils 211 and the inspection electrode 12, and between them (any one of the aluminum foils 211 and the inspection electrode). 12), and the capacitance C between them is measured based on the change in voltage with the passage of time from the start of DC constant current supply (see JP 2010-54229 A). ) And the above-described effects can be realized.

  In general, a plurality of types of capacitors 200 having different shapes (outer diameters and heights) are mounted on the circuit board 100. For this reason, it is also possible to employ a configuration and method in which a plurality of types of inspection electrodes 12 that match the shape of the capacitor 200 are provided, and the inspection electrodes 12 are replaced and used in accordance with the shape of the capacitor 200 to be inspected. Further, a configuration and a method are provided in which the inspection electrode 12 having a structure capable of adjusting (changing) the shape (inner diameter and height) is provided and the shape of the inspection electrode 12 is adjusted according to the shape of the capacitor 200 to be inspected. You can also

DESCRIPTION OF SYMBOLS 1 Inspection apparatus 11 Signal generation part 12 Inspection electrode 14 Measurement part 15 Processing part 200 Capacitor 210 Columnar body 211a Anode aluminum foil 211b Cathode aluminum foil 212 Electrolyte sheet 213a Anode terminal 213b Cathode terminal 220 Case 221 Cylindrical body 222 Plate body 100 Circuit board 101a Anode land 101b Cathode land Cm Measured value Cr Specified value G Guard potential Op1 First output part Op2 Second output part S Inspection signal

Claims (6)

A columnar body wound in a columnar shape with a sheet-like electrolyte body sandwiched between the anode sheet body and a cathode sheet body, a case covering the columnar body, and a connection to each of the sheet bodies. A capacitor having an anode terminal and a cathode terminal drawn out of the case is mounted by connecting the respective terminals to the anode connected portion and the cathode connected portion in the mounting target. In the state, the inspection device configured to be capable of inspecting the presence or absence of misconnection in which the respective connected portions and the respective terminals are connected in a state where the polarity is reversed,
A signal generation unit that generates an inspection signal to be supplied to each sheet body via each connected portion to which each terminal is connected, and an inspection that can be arranged in a facing state facing the sheet surface of each sheet body An electrode for measurement, a measurement unit for measuring a capacitance between any one of the sheet bodies and the inspection electrode when the inspection signal is supplied, and the measurement unit measured by the measurement unit An inspection unit for inspecting the presence or absence of the erroneous connection based on the measured capacitance value,
In the inspection unit, the inspection electrode arranged in the facing state is connected to one of the first output unit and the second output unit of the signal generation unit, and one of the connected parts Is measured in a state where is connected to the other of the first output unit and the second output unit, and the other of the connected parts is connected to a guard potential having the same potential as that of the first output unit. An inspection apparatus that executes an inspection process for inspecting whether or not there is an erroneous connection based on a comparison result between a value and a predetermined value.   In the inspection process, the inspection unit has the inspection electrode connected to the first output unit, the cathode connected portion connected to the second output unit, and the anode connected The inspection apparatus according to claim 1, wherein it is determined that the erroneous connection has occurred when the measured value measured in a state where the part is connected to the guard potential is equal to or less than the specified value.   In the inspection process, the inspection unit is configured such that the inspection electrode is connected to the first output unit, the anode connected unit is connected to the second output unit, and the cathode connected unit The inspection apparatus according to claim 1, wherein the erroneous connection is determined to occur when the measured value measured in a state where the portion is connected to the guard potential exceeds the specified value.   In the inspection process, the inspection unit has the inspection electrode connected to the second output unit, the cathode connected portion connected to the first output unit, and the anode connected The inspection apparatus according to claim 1, wherein it is determined that the erroneous connection has occurred when the measured value measured in a state where the part is connected to the guard potential is equal to or less than the specified value.   In the inspection process, the inspection unit has the inspection electrode connected to the second output unit, the anode connected portion connected to the first output unit, and the cathode connected The inspection apparatus according to claim 1, wherein the erroneous connection is determined to occur when the measured value measured in a state where the portion is connected to the guard potential exceeds the specified value. A columnar body wound in a columnar shape with a sheet-like electrolyte body sandwiched between the anode sheet body and a cathode sheet body, a case covering the columnar body, and a connection to each of the sheet bodies. A capacitor having an anode terminal and a cathode terminal drawn out of the case is mounted by connecting the respective terminals to the anode connected portion and the cathode connected portion in the mounting target. In the state, the inspection method for inspecting the presence or absence of misconnection in which the respective connected parts and the respective terminals are connected in a state where the polarity is reversed,
The inspection electrode arranged in a facing state facing the sheet surface of each sheet body is connected to one of the first output unit and the second output unit of the signal generation unit, and any of the connected parts Each terminal is connected in a state where one is connected to the other of the first output unit and the second output unit, and the other of the connected parts is connected to a guard potential having the same potential as that of the first output unit. An inspection signal is supplied to each of the sheet bodies through each of the connected portions, and a capacitance between one of the sheet bodies and the inspection electrode is measured, and the measured static An inspection method for inspecting the presence or absence of the erroneous connection based on a comparison result between a measured value of electric capacity and a predetermined value defined in advance.

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