JP4367802B2 - Electrostatic potential measuring device, static eliminator and static eliminator combined with electrostatic potential measuring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrostatic potential measuring device, a static eliminator, and a static potential measuring device combined static eliminator.
[0002]
[Prior art]
In the conventional electrostatic potential measurement method, as shown in FIG. 13, the measurement electrode 104 is placed at a certain distance in the vicinity of the measurement object 100, the electric field (electric field lines) from the object 100 is measured, and The method of calculating the electrostatic potential backward is the mainstream. In this case, an electrostatic shielding plate 102 having an opening is placed in front of the measurement electrode 104, and this is mechanically (physically) vibrated to measure the electric field. Note that the measurement value obtained by the electric field measurement electrode 104 is amplified by the amplifier 106 and read by the meter 108.
[0003]
[Problems to be solved by the invention]
However, since this measurement method has a complicated measurement structure, it is weak against vibrations and shocks, is expensive, and cannot be used easily.
[0004]
Accordingly, an object of the present invention is to provide a novel electrostatic potential measuring device.
[0005]
Another object of the present invention is to provide a static eliminator using a novel principle of electrostatic potential measurement.
[0006]
Still another object of the present invention is to provide a static eliminator having an electrostatic potential measuring function.
[0007]
In order to achieve the aforementioned object, the present invention comprises a + discharge needle used for + ion emission,
A discharge needle, a positive current for measuring the current flowing from the current source to the positive discharge needle, and a current source for generating a current to be supplied to the positive discharge needle. Current meter for measuring current flowing from the current source to the discharge needle, an ammeter for current, an ammeter for + current, and an ammeter for current Computation means for computing a difference or ratio of current absolute values or both, a measurement terminal connected to the current source, and a conductor connected to the measurement terminal and hung on a human body. The characteristic electrostatic potential measuring device is adopted.
[0008]
The present invention also includes a + discharge needle used for + ion emission, a −discharge needle used for −ion emission, a current source that generates a current to be supplied to the + discharge needle and the −discharge needle, A static eliminator having a conductor connected to the current source and hung on a human body .
[0009]
Furthermore, the present invention includes a + discharge needle used for + ion emission, a −discharge needle used for −ion emission, a current source that generates current to be supplied to the + discharge needle and the −discharge needle. And a conductor connected to the current source and hung on the human body .
[0010]
【Example】
Next, examples of the present invention will be described. FIG. 1 is a circuit block diagram showing main components of an electrostatic potential measuring device according to an embodiment of the present invention. FIG. 2 is a circuit diagram of the electrostatic potential measuring device according to the embodiment of the present invention. As shown in FIG. 1, the electrostatic potential measuring instrument 10 of the present invention includes an oscillation circuit 12, a + boost circuit 14, a -boost circuit 16, a + discharge needle 22, a -discharge needle 24, and a measurement terminal 26. The configuration of is the same as that of the static eliminator. However, in the present invention, sensors (that is, ammeters) 18 and 20 for measuring a positive discharge current and a negative discharge current are newly added to the structure of the static eliminator. Since it is comprised in this way, the electrostatic level measuring device of this invention also has a static elimination function.
[0011]
The electrostatic potential is measured by measuring the + high voltage current I and the −high voltage current J, and calculating the electrostatic potential of the measuring terminal 26 of the electrostatic potential measuring device from the difference or ratio of the absolute values of these measured values or both. In FIG. 2, by isolating the primary winding and the secondary winding of the oscillation transformer (high-frequency step-up transformer) that constitutes the oscillation circuit 12, the electronic circuit after the secondary winding is separated from the primary circuit. Since it is insulated, it is insulated from the ground even if the primary circuit is connected to the external power supply line. Therefore, when the + ion discharge amount from the + discharge needle and the − ion discharge amount from the − discharge needle are different, the electrostatic potential of the electronic circuit after the secondary winding changes, and the + ion discharge amount and the − ion discharge Acts to make the quantities equal. For example, when the electrostatic potential becomes +, the amount of + ion discharge increases and acts to lower the electrostatic potential, and when it decreases, the amount of + ion discharge also decreases. As a result, the amount of + ion discharge and the amount of − ion discharge are equal. Become. That is, it acts so that ion balance (balance of the generation amount of + ions and − ions) can be achieved. This action is the basic principle of the electrostatic potential measuring device, and is effective for realizing the balance of + and − ion emission amounts required for the static eliminator. Note that a switch 27 is disposed between the ground side of the primary side winding and the secondary side winding of the high-frequency step-up transformer, and these windings can be connected or not connected. .
[0012]
FIG. 3 is a circuit block diagram showing main components of an electrostatic potential measuring device according to another embodiment. In the embodiment of FIG. 1, since the current measurement is to measure the current of the high voltage portion after boosting, the electrostatic potential measuring device of the embodiment shown in FIG. 3 is used when measurement is difficult. In this electrostatic potential measuring device, although it is approximate, current measurement is performed by voltage doubler rectification (abbreviated before boosting).
[0013]
FIG. 4 is a block diagram showing main components of an electrostatic potential measuring device according to another embodiment. In the embodiment shown in FIG. 3, since the current is measured at two locations, the + side and the − side, two DC ammeters are required. On the other hand, in the circuit shown in FIG. 4, only one AC ammeter is inserted between the connection point of the input terminal of the + boost circuit and the input terminal of the −boost circuit and the output terminal of the oscillation circuit, Current (I) and -current (J) are measured. As shown in the graph of FIG. 4, the + current value I is measured in the positive half cycle that flows from the oscillation circuit toward the boost circuit, and the -current value is measured in the next negative half cycle that flows from the boost circuit toward the oscillation circuit. Measure J. In this way, approximate values of + discharge current and −discharge current are obtained.
[0014]
FIG. 5 is a block diagram showing the main components of the electrostatic potential measuring device of still another embodiment. In the embodiment shown in FIG. 4, since the current is measured after the output terminal of the oscillation circuit, as can be seen from FIG. 2, the voltage is slightly higher after the high-frequency step-up transformer. Actually, the voltage is boosted to about 1 KV. Therefore, current measurement is cumbersome and expensive. On the other hand, in the embodiment shown in FIG. 5, since the current is measured at a low voltage, it is easy and does not cost.
[0015]
In FIG. 5, the current is measured by placing an ammeter under the high-frequency step-up transformer in the oscillation circuit, that is, between the ground-side terminal of the secondary winding and the ground. Since the potential here is almost 0 V, current measurement is easy. A specific measurement method is shown enlarged in FIGS. 5a and 5b. In FIG. 5a, the current i (alternating current) is changed to a voltage v (amplified) with a transformer and measured. In FIG. 5b, the current i is changed to a magnetic field line by a coil, which is detected by a Hall element and measured as a voltage v. As shown in FIGS. 5a and 5b, even if a current detection coil is inserted in series with the high-frequency step-up transformer, there is no problem because the impedance of the coil is reduced.
[0016]
Next, the principle of measuring the electrostatic potential of the measurement terminal of the electrostatic potential measuring device will be described with reference to FIG.
(Case 1)
In Case 1, the potential of the measurement terminal of the electrostatic potential measuring device is the center of the vertical axis, that is, 0V. At this time, the absolute value of the current discharged from the + high voltage electrode (+ discharge needle) (in the figure, +5 KV) is I (1), and −high voltage electrode (−discharge needle) (−5 KV in the figure) If the absolute value of the current discharged from J (1) is J (1), these are almost equal. That is, I (1) −J (1) = 0.
[0017]
(Case 2)
The potential of the measurement terminal of the electrostatic potential measuring device is charged to +3 KV. At this time, the + high voltage electrode becomes +8 KV at (5 KV + 3 KV), and the absolute value I (2) of the current to be discharged is large, and conversely, the −high voltage electrode eventually becomes −2 KV at (−5 KV + 3 KV) and is discharged from now on. The absolute value J (2) of the current that is applied is small. That is, I (2) −J (2)> 0.
[0018]
(Case 3)
The electric potential of the measuring terminal of the electrostatic potential measuring device is charged to −4 KV. At this time, the + high voltage electrode becomes (5 KV-4 KV) at 1 KV, the absolute value I (3) of the current discharged from this is small, and the -high voltage electrode becomes (-9 KV) at (-5 KV-4 KV). The absolute value J (3) of the discharged current is large. That is, I (3) −J (3) <0.
[0019]
Thus, the magnitude and the sign of the sign of the absolute value difference (I−J) of the discharge currents of the + and − electrodes change depending on their own charging potential. That is, the charged potential at the measurement terminal of the electrostatic potential measuring device is a function of (I−J), and can be expressed as charged potential = F (I−J). Further, instead of the difference (I−J), a ratio (I / J) or a combination of both can be used. This is the principle of the electrostatic potential measurement of the present invention.
[0020]
FIG. 7 shows the principle of a human static eliminator. The human body 50 and the static eliminator 10 are electrically connected by the conductor 30 to operate the static eliminator (release ions). Then, if the human body 50 has a positive charge, that is, if it is positively charged, I becomes larger than J and accumulated in the human body 50 as shown in FIG. Discharge the charge. Therefore, the charge of the human body 50 is discharged as the discharge of the charge eliminator proceeds. This is the principle of one type of human body static eliminator.
[0021]
Combining the principles of FIG. 6 and FIG. 7 makes it possible to obtain a multi-function device in which the static eliminator of the present invention and the electrostatic potential measuring device are integrated (that is, a static eliminator having an electrostatic potential measuring function). This multi-function device is shown in FIG.
[0022]
That is, the human body 50 is discharged by discharging from the + discharge electrode 22 and the -discharge electrode 24 of the static eliminator 10 electrically connected to the human body 50. At the same time, the positive and negative discharge currents are measured by the current sensors 18 and 20, and the calculation unit 32 calculates (I−J) or I / J or a combination of both. The charged potential of the human body is obtained from the polarity and size, and is displayed on the display device 34, which is a meter or a monitor, to display the level at which static electricity is accumulated in the human body. For example, the red lamp 36 in the display device is turned on when I> J + electrostatic charge, the green lamp 38 is turned on when there is no electrostatic charge when I = J, and −static electricity when I <J. During charging, the yellow lamp 40 is turned on.
[0023]
In the present invention, neutralization is performed simultaneously with the measurement of the electrostatic potential, and the electrostatic potential is constantly returned to 0V. If the human body is charged for some reason, the charged state is displayed. If the static eliminator is operating normally, it immediately returns to 0V. If there is any failure or abnormality in the static eliminator or the occurrence of static electricity is more than the static elimination capability, the static charge status is displayed and notified to the person.
[0024]
FIG. 9 shows an actual embodiment. As shown in FIG. 9, the static eliminator 10 is suspended from the neck of a human body 50 by a conductive strap 30 and is electrically connected to the human body. Ions are emitted from the static eliminator in directions other than the face and neck where the skin of the human body 50 is exposed. The main body of the static eliminator 10 is provided with a display device 34 which is a monitor for displaying static electricity. When there is no static charge, the green lamp 38 is lit as a safety sign, and when + static electricity is accumulated. The red lamp 36 is lit as an abnormal sign, and when the negative static electricity is accumulated, the yellow lamp 40 is lit as an abnormal sign.
[0025]
FIG. 10 shows another embodiment. In the embodiment of FIG. 9, one of the colored lamps is turned on according to the presence or absence of static electricity, etc., but in this embodiment, it is directed only to the charge removal function. The static eliminator 10 has a circuit similar to the circuit described with reference to FIGS. 1 to 5 and performs static elimination of the human body based on the same principle as that described with reference to FIG. Therefore, in this embodiment, the electrostatic potential is not measured.
[0026]
FIG. 11 shows another embodiment. In the embodiment of FIG. 9, the ions are not directed to a specific one, but are simply discharged to measure the electrostatic potential and to neutralize static electricity charged on the human body. The embodiment of FIG. Then, ions are radiated toward the workpiece to be neutralized, and the workpiece is neutralized in addition to the measurement of the electrostatic potential and the neutralization of the human body. In this example, in summary:
(1) Static elimination of the human body (2) Static elimination of the workpiece (3) Measurement and display of the electrostatic potential of the human body are performed simultaneously.
As described above, according to the present invention, all the above-described three functions that are actually required in the field can be realized regardless of only the components of the static eliminator. That is, a very economical and practical static eliminator can be achieved.
[0027]
FIG. 12 is a diagram for explaining a method of dealing with power supply voltage fluctuations of the static eliminator. The power supply voltage fluctuates greatly in a portable static eliminator operated mainly by a battery. FIG. 12a shows the voltage drop characteristics of the battery. The voltage drops with time. Even in such a case, in order to keep the static elimination capability of the static eliminator constant, in the present invention, as shown in FIGS. 12b and 12c, the ion emission time of the static eliminator is controlled. That is, while the voltage of the battery is sufficiently high, the ion emission time is limited to a fraction (the duty ratio is kept small). The duty ratio is increased as the battery voltage decreases. By carrying out like this, the static elimination capability of a static eliminator can be kept constant constantly.
[0028]
Since the static eliminator uses a high voltage, it has the property of attracting fine dust in the air, and further, since an ion flow is generated by the discharge, an air flow is induced in the surroundings. By effectively applying these dust suction function and air flow generation function, a static eliminator that also serves as an air cleaner can be obtained. In addition, the normal air cleaner uses only one of the high voltages of + and −, and thereby sucks dust. However, the static eliminator of the embodiment of the present invention has a discharge characteristic of both + and − polarity. have. Thereby, a dust collection effect can be obtained regardless of which polarity the dust has.
[0029]
As is clear from the above description, since the static eliminator of the present invention can be configured to have an air cleaning (dust removal) function, the term “static eliminator” used in the present specification has the original static elimination function. In addition to the static eliminator, it includes those that have an air cleaning (dust removal) function in addition to the static elimination function, and those that are used only for the purpose of air purification (dust removal) in use.
[0030]
【The invention's effect】
As described above, according to the present invention, a novel electrostatic potential measuring device can be obtained. Also, a new static eliminator can be obtained. Furthermore, a static eliminator having an electrostatic potential measuring function can be obtained. In addition, the static eliminator can neutralize the human body or the work alone, and can simultaneously neutralize the human body and the work.
[Brief description of the drawings]
FIG. 1 is a circuit block diagram showing main components of an electrostatic potential measuring device according to an embodiment of the present invention.
FIG. 2 is an electronic circuit diagram of an electrostatic potential measuring device according to an embodiment of the present invention.
FIG. 3 is a circuit block diagram showing main components of an electrostatic potential measuring device according to another embodiment.
FIG. 4 is a circuit block diagram showing main components of an electrostatic potential measuring device according to another embodiment.
FIG. 5 is a circuit block diagram showing main components of an electrostatic potential measuring device according to another embodiment.
FIG. 6 is a diagram for explaining the principle by which the electrostatic potential of the measurement terminal of the electrostatic potential measuring device can be measured.
FIG. 7 is a diagram for explaining the principle of a static eliminator of a human body.
FIG. 8 is a diagram showing a composite function device (that is, a static eliminator having an electrostatic potential measuring function) in which the static eliminator of the present invention and the electrostatic potential measuring instrument are integrated.
FIG. 9 is a diagram illustrating an actual embodiment of a static eliminator.
FIG. 10 is a diagram illustrating another embodiment of the static eliminator.
FIG. 11 is a diagram illustrating still another embodiment of a static eliminator.
FIG. 12 is a diagram for explaining a method of dealing with power supply voltage fluctuations of the static eliminator.
FIG. 13 is a diagram for explaining a conventional electrostatic potential measurement method;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Charger 12 Oscillation circuit 14 + Boosting circuit 16 -Boosting circuit 18 Ammeter 20 Ammeter 22 + Discharge needle (discharge electrode)
24-Discharge needle (discharge electrode)
30 Conductor 50 Human Body 32 Arithmetic Circuit 34 Display Device 36, 38, 40 Lamp 60 Workpiece

Claims (31)

A + discharge needle used for + ion release;
-Used for ion release-discharge needle;
A current source for generating a current to be supplied to the + discharge needle and the -discharge needle;
An ammeter for + current for measuring the current flowing from the current source to the + discharge needle;
An ammeter for -current for measuring the current flowing from the current source to the discharge needle;
A computing means for computing a difference or ratio of absolute values of currents obtained by the ammeter for + current and the ammeter for -current, or both,
A measuring terminal connected to the current source;
A conductor connected to the measurement terminal and hung on a human body;
An electrostatic potential measuring device comprising: 2. The electrostatic potential measuring device according to claim 1 , wherein the conductor is connected to a ground side terminal of a secondary winding of a high-frequency step-up transformer in an oscillation circuit or a ground terminal of an ammeter connected to the ground side terminal. An electrostatic potential measuring device characterized by comprising:   2. The electrostatic potential measuring device according to claim 1, wherein the current source includes an oscillation circuit, a + boost circuit that boosts a voltage obtained from the oscillation circuit, and a −boost circuit that boosts a voltage obtained from the oscillation circuit. And an electrostatic potential measuring device. 4. The electrostatic potential measuring device according to claim 3 , wherein the + ammeter and the −ammeter are arranged between the + boost circuit and the + discharge needle and between the −boost circuit and the −discharge needle, respectively. An electrostatic potential measuring device. 4. The electrostatic potential measuring device according to claim 3 , wherein the + ammeter and the −ammeter are respectively disposed between the + boost circuit and the oscillation circuit and between the −boost circuit and the oscillation circuit. Electrostatic potential measuring instrument. 4. The electrostatic potential measuring device according to claim 3 , wherein the + ammeter and the −ammeter are combined into one ammeter, a common connection point between the input terminal of the + boost circuit and the input terminal of the −boost circuit and the oscillation circuit. An electrostatic potential measuring device arranged between the two. 4. The electrostatic potential measuring device according to claim 3 , wherein the + ammeter and the −ammeter are combined into one ammeter, the reference potential side terminal of the secondary winding of the high-frequency step-up transformer in the oscillation circuit and the ground. An electrostatic potential measuring device arranged between the two. 4. The electrostatic potential measuring device according to claim 3 , wherein a primary side winding and a ground side terminal of the secondary side winding of the high frequency step-up transformer in the oscillation circuit are connected. 4. The electrostatic level measuring device according to claim 3 , wherein the primary side winding and the ground side terminal of the secondary side winding of the high frequency step-up transformer in the oscillation circuit are not connected. Constant in electrostatic potential measuring instrument according to any one of claims 1 to 9, in accordance with the variation of the voltage of the voltage source for supplying a voltage to the current source, discharge of the average discharge current by changing the duty ratio An electrostatic potential measuring device characterized in that the electrostatic potential measuring device is maintained. A + discharge needle used for + ion release;
-Used for ion release-discharge needle;
A current source for generating a current to be supplied to the + discharge needle and the -discharge needle;
An ammeter for + current for measuring the current flowing from the current source to the + discharge needle;
An ammeter for -current for measuring the current flowing from the current source to the discharge needle;
A calculating means for calculating a difference or a ratio or both of absolute values of currents obtained by the ammeter for + current and the ammeter for -current;
A conductor connected to the current source and connected to the human body;
A static eliminator also used as an electrostatic potential measuring device. In the static potential measuring instrument combined static eliminator according to claim 11, the static potential measuring instrument combined discharger, characterized in that it comprises a conductor which is subjected to the body is connected to the measuring terminal. 12. The electrostatic potential measurement / static charge remover according to claim 11 , wherein the current source includes an oscillation circuit, a voltage boosting circuit that boosts a voltage obtained from the oscillation circuit, and a voltage boosting voltage obtained from the oscillation circuit. An electrostatic neutralizer for static potential measurement, characterized by comprising a booster circuit. 14. The electrostatic potential measurement / static charge eliminator according to claim 13 , wherein the conductor is connected to a ground side terminal of a secondary winding of a high-frequency step-up transformer in an oscillation circuit or an earth terminal of an ammeter connected to the ground side terminal. Electrostatic potential measurement static eliminator characterized by being connected. 14. The electrostatic potential measurement / static discharger according to claim 13 , wherein the primary side winding and the ground side terminal of the secondary side winding of the high-frequency step-up transformer in the oscillation circuit are connected. Combined static eliminator. 14. The electrostatic discharger for static potential measurement according to claim 13 , wherein the electrostatic discharger is not connected to a ground side terminal of a primary side winding and a secondary side winding of a high frequency step-up transformer in the oscillation circuit. Combined static eliminator. 14. The electrostatic potential measuring device / static discharger according to claim 13 , wherein the + ammeter and the −ammeter are disposed between the + boost circuit and the + discharge needle and between the −boost circuit and the −discharge needle, respectively. A static eliminator combined with an electrostatic potential measuring device. 14. The electrostatic potential measuring instrument combined static eliminator according to claim 13 , wherein the + ammeter and the − ammeter are disposed between the + boost circuit and the oscillation circuit, and between the − boost circuit and the oscillation circuit, respectively. A static eliminator that is also used for electrostatic potential measurement. 12. The electrostatic potential measuring instrument static eliminator according to claim 11 , wherein the + ammeter and the − ammeter are combined into one ammeter, and a common connection point between the input terminal of the + boost circuit and the input terminal of the − boost circuit. The electrostatic potential measuring device and static eliminator is disposed between the oscillation circuit and the oscillation circuit. 12. The electrostatic potential measuring device / static discharger according to claim 11 , wherein the + ammeter and the −ammeter are combined into one ammeter, and the reference potential side of the secondary winding of the high-frequency step-up transformer in the oscillation circuit. An electrostatic neutralizer / static eliminator, which is disposed between a terminal and ground. 12. The electrostatic potential measuring instrument combined static eliminator according to claim 11 , further comprising a display device that displays the calculation result of the calculating means on a plurality of lamps according to the calculation result. Static eliminator. 12. The electrostatic potential measuring instrument combined static eliminator according to claim 11 , wherein the human body is neutralized by simply discharging ions from the + discharge needle and the -discharging needle. 12. The electrostatic potential measuring instrument combined static eliminator according to claim 11 , wherein both the human body and the workpiece are neutralized simultaneously by directing ions emitted from the + discharge needle and the -discharging needle toward the workpiece. Electricity. In the static potential measuring instrument combined static eliminator according to any one of claims 11 to 23, depending on the variation of the voltage of the voltage source for supplying a voltage to the current source, the discharging current by changing the duty ratio of the discharge The electrostatic level measuring device and static eliminator characterized by maintaining a constant value. A + discharge needle used for + ion release;
-Used for ion release-discharge needle;
A current source for generating a current to be supplied to the + discharge needle and the -discharge needle;
A conductor connected to the current source and hung on the human body;
A static eliminator comprising: 26. The static eliminator according to claim 25 , wherein the current source includes an oscillation circuit, a + boosting circuit that boosts a voltage obtained from the oscillation circuit, a −boosting circuit that boosts a voltage obtained from the oscillation circuit, and A static eliminator comprising: In static eliminator according to claim 26, wherein, discharger, characterized in that the conductor is connected to the ground side terminal of the high-frequency step-up transformer secondary winding during the oscillation circuit. In static eliminator according to claim 26, wherein, discharger, characterized in that the ground-side terminal of the high-frequency step-up transformer primary winding and the secondary winding in the oscillation circuit is connected. 26. The static eliminator according to claim 25 , wherein a ground side terminal of the primary side winding and the secondary side winding of the high frequency step-up transformer in the oscillation circuit is not connected. 26. The static eliminator according to claim 25 , wherein the human body is neutralized by simply discharging ions from the + discharge needle and the -discharge needle. 26. The static eliminator according to claim 25 , wherein the human body and the workpiece are simultaneously neutralized by directing ions emitted from the + discharge needle and the -discharge needle toward the workpiece.

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