JPH07111449B2 - Portable human body potential detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable human body charged potential detector for detecting a charged potential of a human body and displaying the degree of the potential.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. 5-18703 discloses a static electricity detector which can contactlessly detect whether or not static electricity is charged. This static electricity detector is a case with a detection opening formed on the front surface that can be held with one hand.A current collector that collects static electricity by ionizing action of radioactive substances, an amplifier that amplifies the detection voltage, and the amplified A comparator for comparing a voltage with a reference voltage, an oscillator, and an alarm such as a buzzer which is activated by an oscillation signal of the oscillator when the comparator produces an output are incorporated in a case. Then, the static electricity due to the ionization action of the air is collected by the current collector with the detection port facing the detected object, and the alarm is activated when the potential is higher than the reference value, so that the charged state can be contactlessly. It can be detected.

In Japanese Utility Model Laid-Open No. 59-62700, there is disclosed a current detecting section having a conductive rubber covering an electrode which is connected to a commercial power source line through a resistor with a conductive wire, and having an indicator such as a lamp. A static eliminator / detector connected to a conductor is disclosed. This device, by contacting the human body with the electrode, discharges the static electricity charged on the human body to the ground through the resistance and the commercial power supply line, detects the current by the current detection unit, and blinks the indicator, It informs whether or not the electricity has been removed.

[0004]

However, the fairness 5-1
Although the static electricity detector of 8703 is portable,
To detect whether or not the human body is charged,
Since the detection opening must be directed toward the human body, the charged state of the human body cannot always be detected. In addition, even if it is known whether or not it is charged at a high electric potential, it is not known how much the electric potential is, and since it is a contactless detection, the distance to the human body is not determined and A large variation occurs depending on the distance from.

The static electricity removing / detecting device disclosed in Japanese Utility Model Laid-Open No. 59-62700 is designed to bring a human body into direct contact with the electrodes. , It is to inform by flashing of the indicator whether or not the static elimination is certainly performed, and the degree of the charged potential of the human body is unknown.

An object of the present invention is to carry a human body while keeping it in contact with the human body, to always accurately detect the charged potential of the human body, and to constantly monitor how much the potential is. To provide a detector.

[0007]

In order to maintain a constant distance between the human body surface and the potential sensor, the portable human body charged potential detector according to the present invention has an electric field of a predetermined thickness outside the potential sensor. A detection unit provided with an insulating human body contact member,
An amplifier for amplifying the output voltage of the potential sensor, a display section for displaying a potential according to the amplified voltage, and a battery serving as a power source for the potential sensor, the amplifier and the display section are provided.

It is preferable that the potential sensor, the amplifier and the battery are provided in the case, the human body contact member is provided on the back side of the case, and the display portion is provided on the front side of the case. In this case, by providing an arm band on the case, the wristband can be used like a wristwatch.

[0009]

In this portable human body charged potential detector, at least the detecting portion is directly attached to the human body surface for use. Since the potential sensor of this detection unit maintains a constant distance from the human body surface by an electrically insulating human body contact member having a predetermined thickness, the charged potential of the human body surface can be accurately measured at a constant distance. Can be detected. When the potential sensor outputs a voltage according to the charged potential of the human body, this voltage is amplified by the amplifier and the potential according to the amplified voltage is displayed on the display unit, so what is the charged potential of the human body surface? Or you can always monitor.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the surface of the portable human body charged potential detector of the first embodiment of the present invention, FIG. 2 shows a partial cross section, and FIG. 3 shows its electrical configuration. This human body electrification potential detector is in the form of a wristwatch, and an arm band 2 is provided on the outside of a case 1 such as a wristwatch case, and is attached to the arm so that it can be carried. In the case 1, a potential sensor 3, an amplifier 4 shown in FIG. 3, a synchronous rectification circuit 5, an analog / digital conversion circuit 6, a potential setting circuit 7 and a battery 8 capable of storing electricity are built-in. A display 9 and a solar cell 10 are provided on the front side of the case 1, and an electrically insulating human body contact member 11 is provided on the back side. This human body contact member 1
Reference numeral 1 also serves as a detachable back cover of the case 1, and a circular detection port 12 is provided in the center in order to directly contact the human body surface and maintain a constant space between the human body surface and the potential sensor 3. It is made of a resin disk having a predetermined thickness.

The potential sensor 3 is a known potential sensor which can detect the charged potential of the human body surface through the detection port 12 in a non-contact manner, for example, a vibration capacitance type, a chopper type, a rotating sector type, or a radiation type current collecting type. Although a potential sensor such as the above can be used, a vibration capacitance type or chopper type potential sensor using a piezoelectric tuning fork is advantageous in terms of size and price.

The output voltage of the potential sensor 3 is amplified by the amplifier 4, rectified by the synchronous rectification circuit 5, and then converted into a digital value by the analog / digital conversion circuit 6. The analog / digital conversion circuit 6 ranks the voltage rectified by the synchronous rectification circuit 5 into a plurality of stages of potential according to the setting by the potential setting circuit 7. The display 9 of this example is
A large number of display segments 9a formed by light emitting diodes or liquid crystals are arranged in a horizontal row. The ranked output from the analog / digital conversion circuit 6 causes the display segments 9a to sequentially light up or blink from the left end to the left end. It is possible to know the degree of the charged potential of the human body depending on how many display segments 9a are lit or blinking. Note that the display unit 9 may be one that displays the electric potential numerically.

The potential sensor 3, the amplifier 4, the synchronous rectification circuit 5, the analog / digital conversion circuit 6, the potential setting circuit 7 and the display 9 are powered by a battery 8. Solar cell 10
When is generated, the electricity is stored in the battery 8.

FIG. 4 shows a second embodiment of the present invention. This portable human body charged potential detector is separated into a detection unit 13 that can be attached to a human body surface such as an arm and a control display unit 14 that can be attached to clothes, and these detection unit 13 and control display unit 14 are provided. Is electrically connected by a cord 15. The detection unit 13 incorporates the potential sensor 3 in the detection unit case 16 having the electrically insulating human body contact member 11, and the control display unit 14 includes the amplifier 4, the synchronous rectification circuit 5, and the analog / analog.
The digital conversion circuit 6, the potential setting circuit 7, and the battery 8 are built in the main body case 17, and the display 9 is provided outside the main body case 17.

[0015]

As described above, according to the human body charged potential detector of the present invention, the human body can be obtained by directly attaching the detection unit having the electrically insulating human body contact member provided outside the potential sensor to the human body surface. Since a constant distance can be maintained between the surface and the potential sensor, the charged potential on the surface of the human body can always be accurately detected at a constant distance. In addition, it is possible to constantly monitor how much the charged potential on the surface of the human body is displayed on the display unit while being carried.

According to the second and third aspects of the invention, since the integrated structure has a form like a wristwatch, it is convenient to carry and can be easily monitored by the user himself.

[Brief description of drawings]

FIG. 1 is a front view of a portable human body charged potential detector according to a first embodiment of the present invention.

FIG. 2 is a partial sectional view of the above.

FIG. 3 is a block diagram showing an electrical configuration of the human body charging potential detector.

FIG. 4 is a block diagram of a portable human body charged potential detector according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Case 2 Arm band 3 Potential sensor 4 Amplifier 5 Synchronous rectification circuit 6 Analog / digital conversion circuit 7 Potential setting circuit 8 Battery 9 Indicator 10 Solar cell 11 Human body contact member 12 Detection port 13 Detection unit 14 Control display unit 15 Code 16 Detection Part case 17 Body case

Claims (3)

[Claims] 1. A detection unit provided with an electrically insulating human body contact member having a predetermined thickness on the outer side of the potential sensor in order to maintain a constant distance between the surface of the human body and the potential sensor, and the potential sensor. Portable human body comprising an amplifier for amplifying the output voltage of the device, a display unit for displaying a potential according to the amplified voltage, and a battery serving as a power source for the potential sensor, the amplifier and the display unit. Charged potential detector. 2. The potential sensor, the amplifier, and the battery are provided in a case, the human body contact member is provided on the back side of the case, and the display unit is provided on the front side of the case.
The portable human body electrification potential detector described in. 3. The portable human body charged potential detector according to claim 2, wherein an arm band is provided on the case.