CN101972549A - High-sensitivity induction type electricity measurer with strong and weak gears - Google Patents
High-sensitivity induction type electricity measurer with strong and weak gears Download PDFInfo
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- CN101972549A CN101972549A CN 201010537481 CN201010537481A CN101972549A CN 101972549 A CN101972549 A CN 101972549A CN 201010537481 CN201010537481 CN 201010537481 CN 201010537481 A CN201010537481 A CN 201010537481A CN 101972549 A CN101972549 A CN 101972549A
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Abstract
The invention belongs to the technical field of electronics and electricians, and relates to a high-sensitivity induction type electricity measurer with strong and weak gears. The electricity measurer is suitable for detecting low voltage and monitoring mains voltage with high electric potential or objects with static electricity, and consists of an inductive electrode A, an inductive electrode B, two groups of composite transistor circuits, an acousto-optic reminding circuit, a hand-touch electrode, a power-supply filter circuit, a power supply and a power-supply key switch. The electricity measurer is characterized in that: the two groups of composite transistor circuits are a homopolar darlington circuit and a heteropolar darlington circuit respectively. A test electrical contact of the conventional test pencil can contact electrified metal objects directly to allow the test pencil to form a complete loop so as to realize normal operation. The electricity measurer can operate normally without contacting the electrified objects directly, wherein the electrified objects can be metal, the objects with the static electricity, computer cathode ray tube (CRT) displays or picture tubes of color televisions and the like.
Description
Technical field
The invention belongs to electronics and electrical technology field, relate to a kind of highly sensitive induction type electricity measurer that has strong and weak two grades, it both had been applicable to the detection low tension, also was applicable to the object of monitoring the higher line voltage of current potential or having static.
Background technology
At present, the structure of known voltage test pencil is to be composed in series by examination electrical contact, current-limiting resistance, neon tube, metal spring and hand touched electrode on the market.Test contact contacts with tested live metal object, and staff contact hand touched electrode constitutes the loop, and when tested metal object had higher voltage relative to the earth, the neon tube starter represented that tested metal object is charged.But, there are the metal shell or the hardware of a lot of electrical appliances not to have in actual use to the adventurous electric shock voltage of human body, only the distribution capacity induction by electrical appliance metal part produces electromotive force (voltage), general voltage test pencil can not be discerned and be lower than the following induced electromotive force of 80V, whether this leaks electricity for the detection electrical appliance and brings certain limitation, is easy to cause misjudgment.
Can not discern the deficiency of no dangerous induced electromotive force in order to overcome the existing voltage test pencil in market, develop and a kind ofly can either discern adventurous electric shock voltage, the survey electric installation that also can discern non-hazardous induced electromotive force or static is necessity particularly.
Below describe a kind of correlation technique that strong and weak two grades highly sensitive induction type electricity measurer making is arranged in detail.
Summary of the invention
Goal of the invention and beneficial effect: the examination electrical contact of traditional voltage test pencil is the contact electrification metal object directly, and making voltage test pencil constitute complete loop could operate as normal.Of the present invention have strong and weak two grades highly sensitive induction type electricity measurer not need direct contact electrification object to get final product operate as normal, and charged object can be metal or object that has static or non-metallic bodies such as computer CRT monitor, colour kinescope.The present invention both had been suitable for detecting low tension, also was suitable for monitoring the object of higher line voltage of current potential or static electrification, used the hand of must being in a good mood very much, and its effect and function can replace traditional voltage test pencil fully.
Technical characterictic: strong and weak two grades highly sensitive induction type electricity measurer is arranged, form by induction electrode A, induction electrode B, two groups of Darlington circuit, acousto-optic alert circuit, hand touched electrode, electric source filter circuit, power supply and power button switch, it is characterized in that two groups of Darlington circuit use same polarity Darlington circuit, heteropolarity Darlington circuit respectively.
The each several part circuit is formed and the mutual annexation of components and parts
1. the same polarity Darlington circuit is made up of 2 NPN transistors (T1, T2), the base stage of NPN transistor (T1) meets induction electrode A, the emitter stage of NPN transistor (T1) meets the base stage and the induction electrode B of NPN transistor (T2) respectively, the colelctor electrode connection circuit VCC of the colelctor electrode of NPN transistor (T1) and NPN transistor (T2), the emitter stage of NPN transistor (T2) connects the base stage of NPN transistor (T3).
2. the heteropolarity Darlington circuit is made up of 1 NPN transistor (T3) and 1 PNP transistor (T4), the base stage of NPN transistor (T3) connects the emitter stage of NPN transistor (T2), the colelctor electrode of NPN transistor (T3) connects the base stage of PNP transistor (T4), the colelctor electrode catcher touched electrode (C) of the emitter stage of NPN transistor (T3) and PNP transistor (T4), the emitter stage of PNP transistor (T4) connects the acousto-optic alert circuit.
3. the acousto-optic alert circuit is made up of buzzer (Y), light emitting diode (D1), the negative pole of one end of buzzer (Y) and light emitting diode (D1) connects the emitter stage of PNP transistor (T4), the anodal connection circuit VCC of the other end of buzzer (Y) and light emitting diode (D1).
4. hand touched electrode (C) connects the negative pole of power supply, and power supply is anodal through key switch (AN) connection circuit VCC.
5. the extexine of induction electrode A, induction electrode B all is with the blind sleeve pipe of plastic insulation.
Operation principle: after the switch that pushes button (AN) is connected power supply, as induction electrode A (charged object with voltage use when low) or induction electrode B (when voltage is higher, using) when sensing the voltage of testee, induced signal is by NPN+NPN Darlington (T1, T2) and NPN+PNP Darlington (T3, T4) compound amplification, entire circuit forms the loop by hand touched electrode (C), (T1～T4) is in succession after the conducting at 4 transistors, be connected on that buzzer (Y) in transistor (T4) emitter stage will send " too ... " cry, the light emitting diode (D1) that is attempted by buzzer (Y) two ends is also lighted simultaneously.Darlington is exactly the Darlington transistor of often saying, circuit uses Darlington transistor, can significantly reduce the requirement of device to driving power, and the multiplication factor of circuit is the product of 4 transistor multiplication factors.
Description of drawings
Accompanying drawing is the circuit working schematic diagram that strong and weak two grades highly sensitive induction type electricity measurer is arranged.
The extexine of induction electrode A, induction electrode B all is with the blind sleeve pipe of plastic insulation; Reference number C in the accompanying drawing is the hand touched electrode, that is: circuit ground.
The specific embodiment
Specification requirement according to the schematic diagram of circuit working shown in the accompanying drawing and description of drawings and the following stated is implemented, and can realize the present invention.
Component parameter and selection
1. the model of 3 transistor Ts 1, T2, T3 is in the circuit: 2SC9013, and transistor T 4 models are: 2SC9012,4 transistorized β values require 〉=150; Require withstand voltage 〉=60V and high more good more;
2. buzzer (Y) requires inside that electronic circuit is arranged, operating voltage: 2.2～2.5V;
3. light emitting diode (D1) is red super bright diode.
Circuit debugging
Circuit working schematic diagram shown in the drawings to specifications, the welding correctness and the welding quality of whole components and parts in the check circuit.It is intact to need only element quality generally speaking, and the circuit welding is errorless, and electricity measurer connects the 3V power supply and gets final product operate as normal.
Because of component seldom, available undersized circuit board is put into all components and parts in plastics small flashlights.Electricity measurer is through actual measurement, and induction electrode A is sensitive especially, and induction electrode A just can sounding, luminous at electricity measurer outside tape insulation layer conductor civil power 1.5cm.With also can sounding, luminous within the induction electrode B induction city electrical distance 1.0cm; Induction electrode A and induction electrode B simultaneously just can sounding, luminous apart from about the computer CRT display screen 10cm, and the distance of the big more induction of computer screen size is far away more.This electricity measurer also has characteristics, can not be subjected to the interference of extraneous light in use and influences, and is very easy to use and directly perceived.
Claims (5)
1. automatic charger of identification accumulator polarity, form by power frequency step-down transformer, half-wave rectifying circuit, IGCT gate trigger circuit and battery, it is characterized in that the rectification circuit of positive half cycle of alternating current or negative half period constitutes by bidirectional thyristor serial connection silicon rectifier diode.
2. the charger of automatic identification accumulator polarity according to claim 1, the gate trigger circuit that it is characterized in that bidirectional thyristor (BT1), by battery, the a port, bidirectional thyristor (BT1), silicon rectifier diode (D4), current-limiting resistance (R2), the b port is formed, battery positive voltage connects the first anode (T1) of bidirectional thyristor (BT1) through a port, the grid (G) of bidirectional thyristor (BT1) connects the positive pole of silicon rectifier diode (D4), the negative pole of silicon rectifier diode (D4) connects the upper end of current-limiting resistance (R2), and the lower end of current-limiting resistance (R2) connects b port and battery terminal negative respectively.
3. the charger of automatic identification accumulator polarity according to claim 1, it is characterized in that the positive half cycle rectification circuit of alternating current, by power frequency step-down transformer (B), bidirectional thyristor (BT1), the a port, battery, the b port, silicon rectifier diode (D3) is formed, the secondary coil upper end of power frequency step-down transformer (B) connects the second plate (T2) of bidirectional thyristor (BT1), the first anode (T1) connects battery positive voltage through a port, battery terminal negative process b port connects the positive pole of silicon rectifier diode (D3), and the negative pole of silicon rectifier diode (D3) connects the lower end of power frequency step-down transformer (B) secondary coil.
4. the charger of automatic identification accumulator polarity according to claim 1, the gate trigger circuit that it is characterized in that bidirectional thyristor (BT2), by battery, the b port, bidirectional thyristor (BT2), current-limiting resistance (R1), silicon rectifier diode (D2), the a port is formed, battery positive voltage connects the first anode (T1) of bidirectional thyristor (BT2) through the b port, the grid (G) of bidirectional thyristor (BT2) connects the lower end of current-limiting resistance (R1), the positive pole of the last termination silicon rectifier diode (D2) of current-limiting resistance (R1), the negative pole of silicon rectifier diode (D2) connects battery terminal negative through a port.
5. the charger of automatic identification accumulator polarity according to claim 1, it is characterized in that alternating current negative half period rectification circuit, by power frequency step-down transformer (B), bidirectional thyristor (BT2), the b port, battery, the a port, silicon rectifier diode (D1) is formed, the second plate (T2) of the following termination bidirectional thyristor (BT2) of power frequency step-down transformer (B) secondary coil, the first anode (T1) connects the positive pole of battery through the b port, battery terminal negative process a port connects the positive pole of silicon rectifier diode (D1), and the negative pole of silicon rectifier diode (D1) connects the upper end of power frequency step-down transformer (B) secondary coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010537481 CN101972549A (en) | 2010-11-10 | 2010-11-10 | High-sensitivity induction type electricity measurer with strong and weak gears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010537481 CN101972549A (en) | 2010-11-10 | 2010-11-10 | High-sensitivity induction type electricity measurer with strong and weak gears |
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| CN101972549A true CN101972549A (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010537481 Pending CN101972549A (en) | 2010-11-10 | 2010-11-10 | High-sensitivity induction type electricity measurer with strong and weak gears |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435823A (en) * | 2011-09-28 | 2012-05-02 | 刘喆 | High-performance induction type electroscope |
| CN103439618A (en) * | 2013-09-09 | 2013-12-11 | 黄月华 | Low-capacity capacitor tester |
| CN105116206A (en) * | 2015-09-25 | 2015-12-02 | 黄宇嵩 | Sensible test pencil |
| CN113433376A (en) * | 2021-08-26 | 2021-09-24 | 深圳佳力拓科技有限公司 | Intelligent test pencil based on three channels and use method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2101879U (en) * | 1991-04-23 | 1992-04-15 | 腾洪福 | Multifunctional test pencil |
| CN2196309Y (en) * | 1993-09-20 | 1995-05-03 | 曹哲欣 | Induction type multipurpose electricity tester |
| CN1847862A (en) * | 2006-05-12 | 2006-10-18 | 康素成 | Acoustooptically prompting multifunctional test pencil circuit |
-
2010
- 2010-11-10 CN CN 201010537481 patent/CN101972549A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2101879U (en) * | 1991-04-23 | 1992-04-15 | 腾洪福 | Multifunctional test pencil |
| CN2196309Y (en) * | 1993-09-20 | 1995-05-03 | 曹哲欣 | Induction type multipurpose electricity tester |
| CN1847862A (en) * | 2006-05-12 | 2006-10-18 | 康素成 | Acoustooptically prompting multifunctional test pencil circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435823A (en) * | 2011-09-28 | 2012-05-02 | 刘喆 | High-performance induction type electroscope |
| CN103439618A (en) * | 2013-09-09 | 2013-12-11 | 黄月华 | Low-capacity capacitor tester |
| CN105116206A (en) * | 2015-09-25 | 2015-12-02 | 黄宇嵩 | Sensible test pencil |
| CN113433376A (en) * | 2021-08-26 | 2021-09-24 | 深圳佳力拓科技有限公司 | Intelligent test pencil based on three channels and use method thereof |
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Application publication date: 20110216 |