JP2012094808A - Polarity discrimination device for polar capacitor and characteristic screening system including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polarity discrimination device for polar capacitor, capable of facilitating discrimination of the polarity of a polar capacitor, and to provide a characteristic screening system including the same.SOLUTION: The polarity discrimination device 100 for polar capacitor includes: a voltage application section 110 that applies a predetermined voltage pulse to a polar capacitor 50 and a control section 140 that charges or discharges the polar capacitor for a predetermined period, measures voltages of the polar capacitor in a positive direction and reverse direction, and discriminates the polarity of the polar capacitor based on a comparative result of the measured voltages.

Description

  The present invention relates to a polar capacitor polarity discriminating apparatus and a characteristic selection system including the polar capacitor, and more particularly, a polar capacitor that discriminates the polarity of a polar capacitor based on a result of charging and / or discharging the polar capacitor for a predetermined time. The present invention relates to a polarity discrimination device and a characteristic selection system including the same.

  Generally, a capacitor is a device for accumulating electric charges, and is configured in a form in which an insulating material called a dielectric is provided between two metal plates facing each other.

  The types of such capacitors are largely classified into polar capacitors and nonpolar capacitors depending on the presence or absence of polarity. Of these, polar capacitors have a fixed polarity, so if a voltage is applied in the opposite direction of polarity, a short circuit will occur. Such a problem may occur.

  Therefore, in order to prevent the above problems, it is necessary to determine the polarity of the polar capacitor in advance before using the polar capacitor.

  Conventionally, in order to discriminate the polarity of the polar capacitor, the polar capacitor is deformed or the polarity of the polar capacitor is directly displayed with a mark.

  However, the conventional method uses the optical camera to identify the appearance of the polar capacitor, so there is a problem that the scale of the polarity discriminating device becomes large, which increases the manufacturing cost. .

  In the present invention, after the polar capacitor is charged and / or discharged for a predetermined time, the polarity of the polar capacitor can be easily determined based on the result of comparing the measured voltages in the forward direction and the reverse direction. It is an object of the present invention to provide a discrimination device and a characteristic selection system including the same.

JP-A-5-209919 JP 2000-31840 A

[Means for solving the problems]
To this end, the polarity discriminating device for a polar capacitor according to an embodiment of the present invention includes a voltage applying unit that applies a predetermined voltage pulse to the polar capacitor; charging or discharging the polar capacitor for a predetermined time, and A control unit that measures the forward and reverse voltages of the polar capacitor and discriminates the polarity of the polar capacitor according to a result of comparing the measured voltages.

Here, the controller determines that the polarity of the polar capacitor is an anode when the positive voltage of the polar capacitor is equal to or higher than the reverse voltage of the polar capacitor, and the positive voltage of the polar capacitor is determined. If the directional voltage is less than the reverse voltage of the polar capacitor, it is determined that the polarity of the polar capacitor is a cathode.
The polarity determining device for a polar capacitor according to an embodiment of the present invention further includes an amplifying unit that amplifies forward and reverse voltages of the polar capacitor.

  Meanwhile, the control unit converts the positive and reverse voltages of the polar capacitor into digital values, and the positive and reverse voltages of the polar capacitor converted into the digital values. A polarity discriminating unit for comparing and discriminating the polarity of the polar capacitor according to the comparison result is included.

  In addition, a limiting unit that limits the magnitude of the voltage pulse applied to the polar capacitor is further included.

  The controller measures absolute values of the forward and reverse voltages of the polar capacitor.

  The predetermined voltage is -0.5V to + 0.5V.

  Meanwhile, the polar capacitor polarity discriminating apparatus according to an embodiment of the present invention generates a reverse voltage so that the measured forward and reverse voltages of the polar capacitor are in a preset voltage range. An adjustment unit for subtracting or adding the forward and reverse voltages of the polar capacitor is further included.

  According to another embodiment of the present invention, there is provided a polar capacitor polarity discriminating apparatus comprising: a voltage applying unit that applies a predetermined voltage pulse to a polar capacitor; and the polar capacitor is charged and discharged for a predetermined time, And a control unit for determining the polarity of the polar capacitor based on the result of comparing the measured voltages.

  Here, the control unit measures the positive and reverse voltages of the polar capacitor after charging the polar capacitor for a first time, compares the measured voltage with a first comparison, and After discharging the capacitor for a second time, the forward and reverse voltages of the polar capacitor are measured, the measured voltage is compared with the second, and the polar capacitor is determined according to the result of the first and second comparisons. Determine the polarity.

  The control unit determines that the positive voltage of the polar capacitor is greater than or equal to the reverse voltage of the polar capacitor as a result of the first comparison, and the positive voltage of the polar capacitor as a result of the second comparison. Is equal to or higher than the reverse voltage of the polar capacitor, it is determined that the polarity of the polar capacitor is an anode.

  The control unit may determine that the positive voltage of the polar capacitor is less than the reverse voltage of the polar capacitor as a result of the first comparison, and the positive voltage of the polar capacitor as a result of the second comparison. Is less than the reverse voltage of the polar capacitor, it is determined that the polarity of the polar capacitor is a cathode.

  The amplifier further includes an amplifying unit that amplifies forward and reverse voltages of the polar capacitor.

  The control unit converts the positive and reverse voltages of the polar capacitor into digital values, and the positive and reverse voltages of the polar capacitor converted into the digital values. A polarity discriminating unit for comparing and discriminating the polarity of the polar capacitor according to the comparison result is included.

  A characteristic selection system including a polarity discrimination device for a polar capacitor according to an embodiment of the present invention applies a predetermined voltage pulse to the polar capacitor to charge or discharge it, and the forward and reverse voltages of the polar capacitor are obtained. A polarity discriminating device for discriminating the polarity of the polar capacitor according to the comparison result, and a polarity for judging whether the polarity of the polar capacitor can be changed according to the polarity of the discriminated polar capacitor and changing the polarity of the polar capacitor Includes conversion device.

  The apparatus further includes a discharge device for picking up the polar capacitor.

And it further includes a measuring device for measuring the characteristics of the polar capacitor.
〔The invention's effect〕

  According to the polar capacitor polarity discriminating apparatus and the characteristic selection system including the polar capacitor according to the embodiment of the present invention as described above, a predetermined voltage pulse is applied to the polar capacitor to charge and / or discharge for a predetermined time, There is an advantage that the polarity of the polar capacitor can be accurately and easily detected by discriminating the polarity of the polar capacitor based on the result of comparing the forward voltage and the reverse voltage of the polar capacitor.

  Thereby, since the polar capacitor can be handled in a bulk state, the storage space for the polar capacitor can be reduced, the supply device can be simplified, and the productivity can be improved.

  And there exists an advantage which can reduce manufacturing cost by this.

It is a block diagram which shows the structure of the polarity discrimination | determination apparatus of a polar capacitor by one Embodiment of this invention. 2 is a graph illustrating a measurement result after charging a polar capacitor according to the first embodiment of the present invention illustrated in FIG. 1. (A) is an equivalent circuit of a polar capacitor, (b) is a graph showing a measurement result after charging a positive voltage pulse in the polar capacitor, and (c) is a reverse voltage pulse in the polar capacitor. It is a graph which shows the measurement result after charging. 4 is a graph illustrating a measurement result after discharging a polar capacitor according to the second embodiment of the present invention illustrated in FIG. 1. 4 is a graph illustrating measurement results after charging and discharging a polar capacitor according to a third embodiment of the present invention illustrated in FIG. 1. It is a block diagram which shows the structure of the polarity discrimination | determination apparatus of a polar capacitor by other embodiment of this invention. It is a block diagram which shows the structure of the characteristic selection system containing the polarity discrimination | determination apparatus of a polar capacitor by one Embodiment of this invention. 4 is a flowchart illustrating a process of determining the polarity of a polar capacitor according to an exemplary embodiment of the present invention.

  Terms and words used in this specification and claims should not be construed to be limited to ordinary and lexicographic meanings, but are terminology concepts used by inventors to best explain their inventions. Must be construed as meanings and concepts that meet the technical idea of the present invention in accordance with the principle that can be appropriately defined.

  Therefore, the embodiment described in this specification and the configuration illustrated in the drawings are only the most preferable embodiment of the present invention, and do not represent the entire technical idea of the present invention. It should be understood that there are various equivalents and variations that can be substituted at the time of filing.

  FIG. 1 is a block diagram illustrating a configuration of a polarity discrimination device for a polar capacitor according to an embodiment of the present invention, and FIG. 2 is a charge of the polar capacitor according to the first embodiment of the present invention illustrated in FIG. It is a graph which shows a later measurement result.

  As shown in FIGS. 1 and 2, the polar capacitor polarity discriminating apparatus 100 includes a voltage applying unit 110, a limiting unit 120, an amplifying unit 130, and a control unit 140.

  The voltage application unit 110 is configured to apply a predetermined voltage pulse and charge the polar capacitor 50 for a first time (ChaT).

  Here, the predetermined voltage pulse is a voltage in a pulse form including a forward voltage and a reverse voltage, and is small enough not to exceed the voltage allowed by the polar capacitor 50, that is, not to destroy the polar capacitor 50. This is a voltage pulse of −0.5V to + 0.5V which is a high voltage.

  Such a voltage pulse may be formed of a rectangular wave, a triangular wave, or a sine wave depending on its form.

  The limiting unit 120 is a means for limiting the level of the voltage applied to the polar capacitor 50, and when the voltage applied from the voltage applying unit 110 to the polar capacitor 50 exceeds the voltage allowed by the polar capacitor 50. In addition, by limiting the level of the voltage applied to the polar capacitor 50, a minute voltage that does not destroy the polar capacitor 50 is applied to the polar capacitor 50.

  The limiting unit 120 is configured using a current limiting circuit such as a limiting resistor R or a constant current diode.

  At this time, if the limiting unit 120 is the limiting resistor R, the voltage charging curve is exponential as shown in FIG. 2, but if the limiting unit 120 is a current limiting circuit such as a constant current diode, The charging curve of the voltage is linear, and the first time (ChaT) that is the charging time is the capacity of the polar capacitor (C) * charging voltage (Vc) / constant current value (I).

  On the other hand, in the embodiment of the present invention, the limiting unit 120 configured by the limiting resistor R will be described as an example.

  The amplifying unit 130 is a means for amplifying the voltage applied to both ends of the polar capacitor 50 after charging the polar capacitor 50 for the first time (ChaT), and adjusts the degree of amplification by the amplification degree (n). can do.

  More specifically, since the voltage level applied to the polar capacitor 50 is minute, the voltage level charged to the polar capacitor 50 is also minute. Accordingly, the amplifying unit 130 amplifies the voltage of the polar capacitor 50 in order to easily compare the forward and reverse voltages of the polar capacitor 50 described later.

  The control unit 140 is a microcomputer that controls the polarity discrimination device 100 of the polar capacitor as a whole, and the positive voltage (Cha_F) and the reverse voltage (Cha_R) of the polar capacitor 50 charged for the first time (ChaT). ) And the polarity of the polar capacitor 50 is determined based on the result of comparing the measured voltages.

  The control unit 140 includes an A / D conversion unit 142 and a polarity determination unit 144. The A / D conversion unit 142 determines the analog voltage values in the forward and reverse directions of the polar capacitor 50 amplified by the amplification unit 130. Convert to digital value.

  The polarity determination unit 144 compares the positive and reverse voltages of the digital polar capacitor 50 converted by the A / D conversion unit 142, and determines the polarity of the polar capacitor 50 based on the comparison result. .

  More specifically, with reference to FIG. 2, the polarity determination unit 144 determines that the polarity capacitor 50 has the forward voltage (Cha_F) of the polar capacitor 50 equal to or higher than the reverse voltage (Cha_R) of the polar capacitor 50. Is positive (+), and if the forward voltage (Cha_F) of the polar capacitor 50 is less than the reverse voltage (Cha_R) of the polar capacitor 50, the polarity of the polar capacitor 50 is negative. It is determined that it is a (−) pole.

  At this time, the polarity discrimination unit 144 discriminates the polarity by converting the forward voltage and the reverse voltage of the polar capacitor 50 into an absolute value, and an absolute value circuit is added to automatically perform A / A only in the DC plus range. If the forward voltage and the reverse voltage of the polar capacitor are converted using the D converter 142, the resolution is improved, so that the polarity of the polar capacitor can be more accurately determined.

  FIG. 3 (a) is an equivalent circuit of a polar capacitor, FIG. 3 (b) is a graph showing a measurement result after charging a positive voltage pulse to the polar capacitor, and FIG. 3 (c) is a polar diagram. It is a graph which shows the measurement result after charging a reverse voltage pulse to a capacitor.

  Hereinafter, the principle that the polarity of the polar capacitor can be detected based on the result of charging the polar capacitor will be described with reference to FIGS.

  As shown in FIG. 3A, the polar capacitor 50 has a capacitance component and a parasitic diode component connected in parallel with the capacitance component. However, when the polar capacitor 50 is charged with a voltage pulse in the positive direction, Since no current flows on the diode side and the current is charged to all the capacitive components, the voltage rises faster per unit time.

  On the other hand, if the polar capacitor 50 is charged with a voltage pulse in the reverse direction, there is a current leaked by the parasitic diode, so that the voltage rise is slower than when charging the voltage pulse in the positive direction. Therefore, since the absolute value of the measured voltage is greater than the reverse voltage in any capacitance, the polarity of the polar capacitor can be determined by comparing the degree of increase in voltage per unit time. Become.

  Table 1 below shows measured voltages in the forward and reverse directions after charging and / or discharging a voltage to the polar capacitor.

  As shown in Table 1, after charging and / or discharging a voltage on a polar capacitor, the measured voltage in the forward and reverse directions is the absolute value in the positive direction regardless of the capacity of the polar capacitor. It can be seen that the voltage is always greater than the absolute value voltage in the reverse direction.

  On the other hand, the first time (ChaT) that is the charging time of the polar capacitor 50 is determined by the time constant (τ = RC) of the limiting resistor R and the capacitance (C) of the polar capacitor 50, and the measured voltage (Vm: Cha_F , Cha_R) is determined by the following mathematical formula.

  Here, Vc is a charging voltage.

  At this time, the measured voltage (Vm) becomes an exponential function (exp) curve, but the charging time is too short or the limiting resistance is too large with respect to the capacity of the polar capacitor 50, and the time constant is 1τ (about 63% charge). ), The difference between the forward voltage and the reverse voltage of the polar capacitor 50 does not appear remarkably because the measured voltage is small.

  On the other hand, when the time constant becomes 3τ (about 95% charge) or more, the voltage reaches the saturation region near the charge voltage. The difference is not noticeable. Therefore, in order to accurately determine the polarity of the polar capacitor 50, the capacitance of the polar capacitor 50 and the time constant from the limiting resistor R must be set within a range of 1τ to 2τ.

  FIG. 4 is a graph showing a measurement result after discharging the polar capacitor according to the second embodiment of the present invention shown in FIG.

  As shown in FIGS. 1 and 4, the voltage application unit 110 applies a minute voltage pulse that does not cause a failure to the polar capacitor 50 to charge the polar capacitor 50, and then completes charging. Discharge for a second time (DChaT).

  Hereinafter, the configuration having the same function has been described in the first embodiment, and thus the description thereof is omitted.

  The controller 140 measures the forward voltage (DCha_F) and the reverse voltage (DCha_R) of the polar capacitor 50 discharged for the second time (DChaT), and compares the measured voltage with the polar capacitor. 50 polarity is discriminated.

  Referring to FIG. 4 in more detail, the A / D converter 142 converts the analog voltage values of the polar capacitor 50 in the forward direction and the reverse direction into digital values.

  The polarity discriminating unit 144 compares the voltages in the positive and reverse directions of the digital polar capacitor 50 converted by the A / D converter 142, and discriminates the polarity of the polar capacitor 50 based on the comparison result. To do. That is, when the forward voltage (DCha_F) of the polar capacitor 50 is equal to or higher than the reverse voltage (| DCha_R |) of the polar capacitor 50, it is determined that the polarity of the polar capacitor 50 is a positive (+) pole. If the forward voltage (DCha_F) of the polar capacitor 50 is less than the reverse voltage (| DCha_R |) of the polar capacitor 50, it is determined that the polarity of the polar capacitor 50 is a negative (-) pole.

  As described above, even if the polar capacitor 50 is charged and then discharged, the absolute value of the measurement voltage is larger than the reverse voltage regardless of the capacitance of the measured voltage. Can be discriminated.

  FIG. 5 is a graph showing measurement results after charging and discharging the polar capacitor according to the third embodiment of the present invention shown in FIG.

Referring to FIG. 5, the polarity of the polar capacitor 50 is determined using the charging voltage in the first embodiment of the present invention and the discharging voltage in the second embodiment, but the charging and discharging are performed in the third embodiment of the present invention. The polarity of the polar capacitor 50 is determined using all the voltages.

  After charging the polar capacitor 50 for the first time (ChaT), the controller 140 measures the forward voltage (Cha_F) and the reverse voltage (Cha_R) of the polar capacitor 50, and the measured voltage is Compare 1

  Then, the controller 140 discharges the polar capacitor 50 for the second time (DChaT), then measures the forward voltage (DCha_F) and the reverse voltage (DCha_R) of the polar capacitor 50, and measures the measured voltage. Are compared for a second time.

  The control unit 140 determines that the forward voltage (Cha_F) of the polar capacitor 50 is equal to or higher than the reverse voltage (| Cha_R |) of the polar capacitor 50 as a result of the first comparison, When the positive voltage (DCha_F) is equal to or higher than the reverse voltage (| DCha_R |) of the polar capacitor 50, it is determined that the polarity of the polar capacitor 50 is positive (+).

  Further, the control unit 140 determines that the forward voltage (Cha_F) of the polar capacitor 50 is less than the reverse voltage (| Cha_R |) of the polar capacitor 50 as a result of the first comparison, If the forward voltage (DCha_F) of the capacitor is less than the reverse voltage (| DCha_R |) of the polar capacitor 50, it is determined that the polarity of the polar capacitor 50 is a negative (-) pole.

  As described above, the reason for discriminating the polarity of the polar capacitor 50 using all of the charge and discharge voltages is that the polar capacitor 50 and the measuring terminal are incompletely in contact, Since there is a possibility that the polarity of the polar capacitor 50 is erroneously determined due to the contact failure state, the polarity of the polar capacitor 50 is clearly determined by comparing all the charge / discharge voltages.

  FIG. 6 is a block diagram showing the configuration of a polarity discrimination device for a polar capacitor according to another embodiment of the present invention.

  As illustrated in FIG. 6, the polar capacitor polarity determination device 200 includes a voltage application unit 210, a limiting unit 220, an amplification unit 230, a control unit 240, and an adjustment unit 250.

  Hereinafter, the configuration having the same function has been described in the embodiment of FIG.

  The adjustment unit 250 generates a reverse voltage and subtracts or adds the forward and reverse voltages of the polar capacitor 50 so that the forward and reverse voltages of the polar capacitor 50 are in a preset voltage range. .

  In other words, when the positive voltage pulse is applied, the adjusting unit 250 causes the positive voltage of the polar capacitor 50 to be subtracted so that a part of the current applied to the amplifying unit 230 flows to the adjusting unit 250. When a reverse voltage pulse is applied, the reverse voltage of the polar capacitor 50 is added so that more current is applied to the amplifier 230.

  More specifically, when the difference between the forward voltage and the reverse voltage of the polar capacitor 50 is small, the amplification degree of the amplification unit 230 may be increased in order to easily determine the difference between the two voltages. Since the A / D conversion unit 242 can only perform conversion within a predetermined voltage range (DC + 10 / −10 V), there is a limit to increasing the amplification factor in order to increase the voltage difference.

  Accordingly, the adjustment unit 250 generates a reverse voltage so that the measurement voltage when the amplification degree is increased falls within a predetermined voltage range (DC + 10 / −10V), and the positive and reverse voltages of the polar capacitor 50 are generated. Subtract or add

  On the other hand, the polar capacitor polarity discriminating apparatus 100 is configured to discharge the polar capacitor 50 in advance so as not to cause erroneous discrimination due to the residual voltage of the polar capacitor 50.

  Also, the polar capacitor polarity discriminating apparatus 100 performs charging and discharging of the polar capacitor 50 several times so that the polar capacitor polarity discriminating apparatus 100 does not cause erroneous discrimination.

  FIG. 7 is a block diagram showing a configuration of a characteristic selection system including a polarity discrimination device for a polar capacitor according to an embodiment of the present invention.

  As illustrated in FIG. 7, the characteristic selection system includes a supply device 70, a polarity determination device 100, a polarity conversion device 300, a measurement device 400, a discharge device 500, and a control device 600.

  First, the polar capacitor 50 is put into the supply device 70 in a bulk state, and is transported to the polarity discriminating device 100 in a state where the polarities are dispersed so that the polarity discrimination is performed.

  The polarity discriminating apparatus 100 applies a predetermined voltage pulse to the polar capacitor 50 to charge and / or discharge, and then compares the voltage in the forward and reverse directions of the polar capacitor 50 according to the result of comparing the polar capacitor 50. The polarity is determined and the result is transmitted to the control device 600.

  Since the polarity discriminating apparatus 100 has been described above, a detailed description thereof will be omitted.

  The controller 600 can perform polarity switching by receiving the polarity information determined by the polarity determining device 100 and controlling the polarity switching device 300 using the received polarity information.

  That is, the polarity information discriminated by the polarity discriminating device 100 is transmitted to the polarity converting device 300 via the control device 600, and the polarity switching can be performed when the discriminated polar capacitor 50 is conveyed.

  The polarity conversion device 300 determines whether the polarity of the polar capacitor 50 can be changed based on the polarity information of the determined polar capacitor 50, and if the polarity of the polar capacitor 50 should be changed based on the determination result, The polarity of the polarity capacitor 50 is changed.

  The measuring device 400 measures the characteristics of the polar capacitor 50. That is, the measuring apparatus 400 performs C / DF measurement in a state where a bias voltage of about DC 1.5V is charged, or performs various characteristic measurements such as leakage current test by charging various types of DC voltages.

  At this time, if a voltage is erroneously applied to the polar capacitor 50, the polar capacitor 50 may be destroyed. Therefore, polarity determination and polarity conversion must be preceded.

  Then, the polar capacitor 50 measured by the measuring device 400 is picked up by the discharging device 500 to perform the next step.

  On the other hand, the measuring device 400 can be configured to perform all the operations performed by the polarity discriminating device 100 and the polarity changing device 300. In this case, there is an advantage that the troublesome communication through the control device 600 is eliminated. is there.

  FIG. 8 is a flowchart illustrating a process of determining the polarity of a polar capacitor according to an embodiment of the present invention.

  As shown in FIG. 8, a predetermined voltage pulse is applied to the polar capacitor 50 (S800).

  Then, the polar capacitor 50 is charged and / or discharged for a predetermined time (S810).

  Next, the forward and reverse voltages at both ends of the polar capacitor 50 are amplified (S820), and the forward and reverse voltages at both ends of the polarized capacitor 50 are converted into digital values (S830).

  Next, it is determined based on the absolute value whether the positive voltage of the polar capacitor 50 is equal to or higher than the reverse voltage (S840). As a result of the determination, the positive voltage of the polar capacitor 50 is equal to or higher than the reverse voltage. If it is (“YES” in S840), it is determined that the polarity of the polar capacitor 50 is the anode (S850).

  If the forward voltage of the polar capacitor 50 is less than the reverse voltage in S840 (“NO” in S840), the polarity of the polar capacitor 50 is determined to be a cathode (S860).

  Here, when it is determined that the polarity of the polar capacitor 50 is the anode, the polarity of the portion indicated by “+” of the polar capacitor 50 is the anode as shown in FIG. When it is determined that the polarity of the capacitor 50 is the cathode, the polarity of the portion indicated by “+” of the polar capacitor 50 is the cathode.

  While the present invention has been illustrated and described with reference to the preferred embodiments of the present invention, the present invention is not limited to the above-described embodiments, and is usually within the technical field to which the present invention belongs without departing from the spirit of the present invention. Various changes and modifications may be made by those who have knowledge of the above.

100, 200 Polarity Capacitor Polarity Discrimination Device 110, 210 Voltage Application Unit 120, 220 Limiting Unit 130, 230 Amplification Unit 140, 240 Control Unit 142, 242 A / D Conversion Unit 144, 244 Polarity Discrimination Unit 300 Polarity Conversion Device 400 Measuring device 500 Discharging device 600 Control device

Claims (18)

A voltage application unit for applying a predetermined voltage pulse to the polar capacitor;
A control unit that charges or discharges the polar capacitor for a predetermined time, measures forward and reverse voltages of the polar capacitor, and determines a polarity of the polar capacitor according to a result of comparing the measured voltages; Polarity discrimination device for polar capacitors. The controller is
The polarity determination device for a polar capacitor according to claim 1, wherein when the positive voltage of the polar capacitor is equal to or higher than the reverse voltage of the polar capacitor, the polarity of the polar capacitor is determined as an anode. The controller is
The polarity determination device for a polar capacitor according to claim 1, wherein when the positive voltage of the polar capacitor is less than the reverse voltage of the polar capacitor, the polarity of the polar capacitor is determined to be a cathode.   The polarity determination device for a polar capacitor according to claim 1, further comprising an amplifying unit that amplifies a forward voltage and a reverse voltage of the polar capacitor. The controller is
An A / D converter for converting the forward and reverse voltages of the polar capacitor into digital values;
2. The polar capacitor according to claim 1, further comprising a polarity discriminating unit that compares forward and reverse voltages of the polar capacitor converted into the digital value and discriminates the polarity of the polar capacitor based on the comparison result. Polarity discrimination device.   The polar capacitor polarity discriminating apparatus according to claim 1, further comprising a limiting unit that limits a magnitude of a voltage pulse applied to the polar capacitor. The controller is
The polarity discriminating device for a polar capacitor according to claim 1, wherein absolute values of forward and reverse voltages of the polar capacitor are measured.   The polarity determination device for a polar capacitor according to claim 1, wherein the predetermined voltage is -0.5V to + 0.5V.   An adjustment unit that generates a reverse voltage and subtracts or adds the forward and reverse voltages of the polar capacitor so that the measured forward and reverse voltages of the polar capacitor are in a preset voltage range. The polarity discrimination device for a polar capacitor according to claim 1, further comprising: A voltage application unit for applying a predetermined voltage pulse to the polar capacitor;
A controller that charges and discharges the polar capacitor for a predetermined time, measures forward and reverse voltages of the polar capacitor, and determines a polarity of the polar capacitor according to a result of comparing the measured voltages; Polarity discrimination device for polar capacitors. The controller is
After charging the polar capacitor for a first time, measuring the positive and reverse voltages of the polar capacitor, comparing the measured voltage for the first time,
After discharging the polar capacitor for a second time, the forward and reverse voltages of the polar capacitor are measured, and the measured voltage is compared to the second,
The polarity discriminating device for a polar capacitor according to claim 10, wherein the polarity of the polar capacitor is discriminated based on a result of the first and second comparisons. The controller is
As a result of the first comparison, the forward voltage of the polar capacitor is greater than or equal to the reverse voltage of the polar capacitor,
The polarity according to claim 11, wherein the polarity of the polar capacitor is determined to be an anode when the positive voltage of the polar capacitor is greater than or equal to the reverse voltage of the polar capacitor as a result of the second comparison. Capacitor polarity discrimination device. The controller is
As a result of the first comparison, the forward voltage of the polar capacitor is less than the reverse voltage of the polar capacitor;
The polarity according to claim 11, wherein the polarity of the polar capacitor is determined to be a cathode when the positive voltage of the polar capacitor is less than the reverse voltage of the polar capacitor as a result of the second comparison. Capacitor polarity discrimination device.   The polarity determination device for a polar capacitor according to claim 10, further comprising an amplifying unit that amplifies a forward voltage and a reverse voltage of the polar capacitor. The controller is
An A / D converter for converting the forward and reverse voltages of the polar capacitor into digital values;
11. The polar capacitor according to claim 10, further comprising: a polarity determination unit that compares a forward voltage and a reverse voltage of the polar capacitor converted into the digital value, and determines a polarity of the polar capacitor based on the comparison result. Polarity discrimination device. A polarity discriminating device that discriminates the polarity of the polar capacitor by applying a predetermined voltage pulse to the polar capacitor to charge or discharge, and comparing the positive and reverse voltages of the polar capacitor,
A characteristic selection system including a polarity conversion device that determines whether or not the polarity of the polar capacitor can be changed based on the polarity of the determined polar capacitor and changes the polarity of the polar capacitor.   The characteristic selection system according to claim 16, further comprising a discharge device that picks up the polar capacitor.   The characteristic selection system according to claim 16, further comprising a measuring device that measures characteristics of the polar capacitor.

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