JP2526158B2 - Detector consisting of coherer and light emitting diode - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a coherer, a light emitting diode, a resistor, a power source, which can share the inspection of static electricity generation and charging, electromagnetic waves, electric induction, minute current, etc. A detector including a display device and a current collector, and a detection method thereof.

(Prior Art) Conventionally, a dedicated detector or the like is required for inspection of static electricity generation and charging, electromagnetic waves, electrical induction, minute currents, etc., and a detector or the like that shares these does not exist. From now on
Around 120 years ago, there is a record that a coherer was used as a detector for a spark transmission receiver.

As shown in FIG. 2, when a radio wave enters the antenna 7, it passes through the primary coil 8 and flows to the ground 9, and the secondary coil 10
Induced current is generated. Although this passes through the condenser 11, since the radio current has a high frequency, the choke coils 12 and 13 have a high impedance, and the radio current does not easily flow to the choke coils 12 and 13 and therefore flows to the coherer 1. Therefore, the internal resistance of the coherer 1 has a low resistance value. Suddenly changes (this is referred to as inversion in the specification) and the current of the power supply 5 (the power supply having a voltage lower than the voltage that inverts the coherer is referred to as power supply in the specification) is a direct current, so the choke coil 12 and the inverted Since the display device 6 operates via the choke coil 13 through the coherer 1 and the like, it is confirmed by the display device that the radio wave has been received.

(Problems to be Solved by the Invention) Conventionally, a coherer has been used only as a detector for reception of a spark oscillator, but the present invention can detect static electricity, electromagnetic waves, electric induction, minute current, etc. The purpose is to provide a detection method thereof.

(Means for Solving the Problem) As shown in FIG. 1, the present invention provides a current collector 2 having an optimum type for detecting at a connection point 15 between one pole of a coherer 1 and one pole of a light emitting diode 3. Install.

Between the other pole of the coherer 1 and the other pole of the light emitting diode 3, the display device 6 and the light emitting diode 3, and a power source 5 for operating the display device 3 and a resistor 4 connected in series are connected.

However, the display device 6 is omitted when it can be detected only by the light emission of the light emitting diode.

(Function) The internal resistance value before the coherer 1 operates is about 10 ¹³ Ω or more, but when a minute current of about 1 pA flows at about 30 V or more, the internal resistance value reverses to about 10 ² Ω. . Since the inverted coherer 1 is released from the inverted state, it remains held in the inverted state for a long time until a shock is applied to the central portion of the coherer.

When the middle portion of the inverted coherer 1 in the length direction is lightly shocked, the internal resistance value of the original coherer 1 suddenly changes again to about 10 ¹³ Ω. (This is referred to as inversion cancellation in the specification.) Although the internal resistance value of a light emitting diode before light emission is very high, when a DC voltage of about 2 V or more is applied to this, a current of 1 mA or more flows and the internal resistance value suddenly increases. Becomes smaller and emits light continuously.

When the electricity is collected by the electricity collecting unit 2 having the optimal form for detecting and generating static electricity, charging, electromagnetic waves, electric induction, minute current, etc.,
This flows to the coherer 1, and at the same time, the internal resistance value of the coherer is inverted to about 10 ² Ω, the current of the power source 5 flows, the light emitting diode 3 emits light, and at the same time the display device 6 operates, the generation of static electricity and charging, electromagnetic waves, electric induction. , Operates with a small current of around 1 pA (including high frequency current, AC / DC, etc.).

(Example) Example 1 A human body electrification checker using the circuit of the present invention is shown in FIG.
1,000Ω resistor 4, coherer 1, power source 5 dry cell 3
V, a brass disk with a diameter of 15 mm as the direct contact type current collector 2, a reversal release button 14, etc. Of the reversing release button 14, only the heads of the current reversing section 2 and the reversal release button 14 are exposed to the outside.
If the power switch 22 is closed after the direct contact type current collector 2 is brought into contact with the grounded conductor 17 by holding the part 16 by hand, the light emitting diode 3 emits light when the human body is charged more than necessary. To do.

When the inspection is complete, separate the current collector 2 from the grounded conductor 17, apply a shock to the head of the reversal release button 14, and then the coherer 1
Is returned to the original high resistance value, and the light emitting diode 3 is stopped by opening the power switch 23.

Example 2 FIG. 4 shows a detection method to be displayed when the moving object 18 to be charged has an abnormal charging voltage. The electrostatic capacitance type current collector 2 is installed at a position close to the object to be measured 18, and the detector of the present invention is installed through the shield wire 19.

Example 3 When a power line receives an induced lightning strike, a lightning strike, etc.
Arc rings 20, 21 are attached to both ends of the insulator 25 in order to prevent the insulator 25 between the power transmission line 26 and the transmission line 26 from being damaged.

When there is a big thunder, a spark discharge occurs between the arc rings,
It is conceivable that the heat generated at this time may damage the arc ring and prevent the insulator from being damaged.

Electromagnetic waves are generated when a spark discharge is generated between the arc rings. The coil type current collector 2 of the present invention receives this electromagnetic wave and operates the display device.

To carry out this experiment, a simulation experiment shown in FIG. 5 was conducted.

The capacitance 22 formed between the transmission line 26 and the ground 9 is set to 10
pF, copper wires with a diameter of 2 mm were used as the earth rings 20, 21, and the distance between them was 2 mm. As a lightning source, a hammer type piezoelectric element 27 (output voltage 10,000V) was applied to the pulse voltage once between the transmission line 26 and the earth 9. At this time, a spark discharge occurred between the arc rings, and the transmission line 26, Electromagnetic waves are generated in circuits such as the electrostatic capacitance 22, the spark discharge between the arc rings 20 and 21, the steel tower 24, and the earth (earth) 9. An experiment was conducted by placing the coil type current collector 2 of the present invention close to the spark oscillating current and the steel tower 24 which is a part of the circuit.

When the display device of the present invention operates, a carrier wave can be placed on the power transmission line to notify the office or the like, and the coherer can be canceled from the office by the carrier wave.

(Effects of the Invention) In the human body electrification detector of Example 1, the human body electrostatic capacity is 100 pF, the human body electrification voltage is assumed to be 30 V, and a 100 pF capacitor is charged with 30 V DC, and this capacitor is The coherer was inverted when it was brought into contact with the direct contact type current collector 2 and the conductive sheet tension 16 held by hand.

When the power switch 24 is closed, the light emitting diode 3 emits light, and it is displayed that the human body charging voltage is 30 V or more.

In Example 2, an acrylic film as the object to be measured 18 shown in FIG. 4 was moved at a speed of 20 m per minute and the upper 10 cm.
Where the outer diameter is 15 mm and the inner diameter is 10 mm as the capacitance type current collector 2.
Brass bar 5mm length 90mm in 1,000mm length bakelite pipe
Shield wire 19 length 20m on brass rod with 0mm
The core wire at one end is attached and the core wire at the other end of the shield wire is connected to the connection point 15 between the coherer 1 and the light emitting diode 3. When the charging voltage of the object to be measured 18 reached 2,000 V, the coherer 1 was inverted and the display device 6 was activated.

The setting of the detection voltage of the charging voltage of the object to be measured 18 is determined by the distance between the object to be charged 18 and the capacitance type current collector 2.

Example 3 As a result of the simulation experiment, only the steel tower of the spark discharge generated between the arc rings in which the coil type current collector of the present invention was installed worked, and the present invention installed in another steel tower did not work.

Therefore, it is possible to display only the steel tower where the spark discharge is generated between the arc rings installed in the steel tower.

[Brief description of drawings]

 Fig. 1 Circuit diagram according to the present invention Fig. 2 Circuit diagram of a conventional coherer Fig. 3 to Fig. 5 Explanatory diagram of an embodiment , Coil type) 3 …… light emitting diode 4 …… resistor 5 …… power supply 6 …… display device 7 …… antenna 8 …… primary coil 9 …… ground 10 …… secondary coil 11 …… capacitor 12 …… choke Coil 13 …… Choke coil 14 …… Reversal release button 15 …… Connection point 16 …… Conductive sheet tension 17 …… Grounded conductor 18 …… Charge object 19 …… Shield wire 20 …… Ground ring 21 …… Earth ring 22 …… Capacitance 23 …… Power switch 24 …… Tower 25 …… Insulator 26 …… Transmission line 27 …… Hammer type piezoelectric element

Claims (1)

(57) [Claims] 1. A coherer and a light emitting diode, each of which has one pole connected to a current collector, and a resistor, a power source and a display connected between the other pole of the coherer and the other pole of the issuing diode. A detector comprising a coherer and a light emitting diode, characterized in that the other pole of the coherer is grounded.