CN212514766U - LED induction type test pencil - Google Patents
LED induction type test pencil Download PDFInfo
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- CN212514766U CN212514766U CN202020217882.8U CN202020217882U CN212514766U CN 212514766 U CN212514766 U CN 212514766U CN 202020217882 U CN202020217882 U CN 202020217882U CN 212514766 U CN212514766 U CN 212514766U
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- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 230000006698 induction Effects 0.000 title claims abstract description 15
- 230000001939 inductive effect Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 229910052754 neon Inorganic materials 0.000 description 4
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000004993 liquid crystal window Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to a LED induction type electrography. The test pencil comprises a coil L1, a triode Q1, a triode Q2, a triode Q3, an LED lamp D1, a resistor R1 and a voltage source; one end of the coil L1 is connected to a first port of a transistor Q1, a second port of the transistor Q1 is connected to a first port of the transistor Q2, a second port of the transistor Q2 is connected to a first port of a transistor Q3, and a second port of the transistor Q3 is grounded; the third port of the triode Q1 is connected with the third port of the triode Q2, the third port of the triode Q3 is connected with one end of an LED lamp D1, the other end of the LED lamp D1 is connected with the third port of the triode Q2 and one end of a resistor R1, and the other end of the resistor R1 is connected with a voltage source. The utility model realizes the non-contact live wire detection and has high sensitivity; the utility model discloses preparation electrography low cost, safe and reliable.
Description
Technical Field
The utility model relates to an induction type electrography technical field is a LED induction type electrography.
Background
The test pencil is also called test pencil, which is called test pencil for short. The testing tool is an electrician tool and is used for testing whether the electric wire is electrified or not. The pen body is provided with a neon bulb, and if the neon bulb shines during testing, the neon bulb indicates that the lead is electrified or is a fire wire of a passage. The pen point and the pen tail of the test pencil are made of metal materials, and the pen holder is made of insulating materials. When the test pencil is used, a user must touch the metal part at the tail end of the test pencil by hand, otherwise, because a charged body, the test pencil, a human body and the ground do not form a loop, neon bulbs in the test pencil cannot emit light to cause misjudgment, and the charged body is considered to be uncharged.
According to the contact mode:
contact test pencil: the detection means obtains an electric signal by contacting the charged body. The common shape of the screw driver is a straight screw driver type and is used as a test pencil and a straight screw driver; pen type, directly displaying the measured data in the liquid crystal window.
Induction type test pencil: with inductive testing, the voltage on the control line, conductors and socket can be checked or the location of the open circuit along the wires can be checked without physical contact. The personal safety of the detection personnel can be greatly guaranteed.
At present, in the occasions of home decoration and the like, the phenomenon that an electric drill breaks an embedded electric wire exists, and a simple device for detecting the position of the embedded electric wire is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a simply survey response electrography of buried electric wire position underground, the utility model provides a LED induction type electrography, the utility model provides a following technical scheme:
an LED inductive test pencil, comprising a coil L1, a transistor Q1, a transistor Q2, a transistor Q3, an LED lamp D1, a resistor R1 and a voltage source;
one end of the coil L1 is connected to a first port of a transistor Q1, a second port of the transistor Q1 is connected to a first port of the transistor Q2, a second port of the transistor Q2 is connected to a first port of a transistor Q3, and a second port of the transistor Q3 is grounded;
the third port of the triode Q1 is connected with the third port of the triode Q2, the third port of the triode Q3 is connected with one end of an LED lamp D1, the other end of the LED lamp D1 is connected with the third port of the triode Q2 and one end of a resistor R1, and the other end of the resistor R1 is connected with a voltage source.
Preferably, the transistor Q1, the transistor Q2 and the transistor Q3 are all S9013 type transistors.
Preferably, the voltage source adopts a single 12V miniature battery, a stack of three 3V button batteries or a single laminated battery.
Preferably, the induction coil of the LED lamp D1 is formed by winding 0.47 enameled wire into an air coil with a diameter of 5 mm, and the number of the coils is between 30 and 40.
Preferably, the resistor R1 is 1k Ω.
The utility model discloses following beneficial effect has:
the utility model realizes the non-contact live wire detection and has high sensitivity; the utility model discloses preparation electrography low cost, safe and reliable. .
Drawings
Fig. 1 is a structural diagram of an LED inductive test pencil.
Detailed Description
The present invention is described in detail below with reference to specific embodiments.
The first embodiment is as follows:
according to fig. 1, the present invention provides an LED inductive test pencil, which comprises a coil L1, a transistor Q1, a transistor Q2, a transistor Q3, an LED lamp D1, a resistor R1, and a voltage source;
one end of the coil L1 is connected to a first port of a transistor Q1, a second port of the transistor Q1 is connected to a first port of the transistor Q2, a second port of the transistor Q2 is connected to a first port of a transistor Q3, and a second port of the transistor Q3 is grounded;
the third port of the triode Q1 is connected with the third port of the triode Q2, the third port of the triode Q3 is connected with one end of an LED lamp D1, the other end of the LED lamp D1 is connected with the third port of the triode Q2 and one end of a resistor R1, and the other end of the resistor R1 is connected with a voltage source.
The coil is in an environment without a strong induction source, Q1 is in a cut-off state, the output current of the emitter is approximately zero, and Q2 and Q3 are also in a cut-off state and the LED does not emit light similarly. When an inductance coil in the circuit is close to a live wire, a weak induction signal is compositely amplified through Q1-Q3, so that Q3 forms a large collector current to light an LED light-emitting tube. The static power consumption of the circuit is approximately zero.
The triode Q1, the triode Q2 and the triode Q3 are all S9013 type triodes, the requirement is that leakage current is small, the current amplification factor is about 300, the resistor R1 is used for limiting current of a light-emitting tube, the resistor R1 can be used for limiting current of the light-emitting tube, the resistor R1/4W 1K can be selected, and an LED can be selected from a common light-emitting tube. The induction coil can be wound by 0.47 enameled wire into an air coil with the diameter of about 5 mm, and 30-40 turns are suitable.
The power supply used by the circuit can be selected from 6-12V voltage, such as a single 12V miniature battery, a stack of three 3V button batteries, a single laminated battery and the like. By compact installation, a portable form similar to a general-purpose electroprobe can be made.
The above is only the preferred implementation of a LED induction type electrography, and the scope of protection of a LED induction type electrography not only limits to above-mentioned embodiment, and the technical scheme that all belong to under this thinking all belongs to the utility model discloses a scope of protection. It should be noted that modifications and variations can be made by those skilled in the art without departing from the principles of the invention, and such modifications and variations are considered to be within the scope of the invention.
Claims (4)
1. An LED induction type electroprobe is characterized in that: the test pencil comprises a coil L1, a triode Q1, a triode Q2, a triode Q3, an LED lamp D1, a resistor R1 and a voltage source;
one end of the coil L1 is connected to a first port of a transistor Q1, a second port of the transistor Q1 is connected to a first port of the transistor Q2, a second port of the transistor Q2 is connected to a first port of a transistor Q3, and a second port of the transistor Q3 is grounded;
the third port of the triode Q1 is connected with the third port of the triode Q2, the third port of the triode Q3 is connected with one end of an LED lamp D1, the other end of the LED lamp D1 is connected with the third port of the triode Q2 and one end of a resistor R1, and the other end of the resistor R1 is connected with a voltage source; the resistor R1 is a resistor of 1k Ω.
2. The LED inductive test pencil of claim 1, wherein: the triode Q1, the triode Q2 and the triode Q3 are all S9013 type triodes.
3. The LED inductive test pencil of claim 1, wherein: the voltage source adopts a single 12V micro battery, three 3V button cell batteries or a single laminated battery.
4. The LED inductive test pencil of claim 1, wherein: the induction coil of the LED lamp D1 is an air-core coil with the diameter of 5 mm which is wound by 0.47 enameled wire, and the number of the coils is between 30 and 40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020217882.8U CN212514766U (en) | 2020-02-27 | 2020-02-27 | LED induction type test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020217882.8U CN212514766U (en) | 2020-02-27 | 2020-02-27 | LED induction type test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212514766U true CN212514766U (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020217882.8U Active CN212514766U (en) | 2020-02-27 | 2020-02-27 | LED induction type test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212514766U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157779A (en) * | 2020-02-27 | 2020-05-15 | 常州机电职业技术学院 | LED induction type test pencil |
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2020
- 2020-02-27 CN CN202020217882.8U patent/CN212514766U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157779A (en) * | 2020-02-27 | 2020-05-15 | 常州机电职业技术学院 | LED induction type test pencil |
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