CN1932532A - Induction test pencil - Google Patents
Induction test pencil Download PDFInfo
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- CN1932532A CN1932532A CN 200610116703 CN200610116703A CN1932532A CN 1932532 A CN1932532 A CN 1932532A CN 200610116703 CN200610116703 CN 200610116703 CN 200610116703 A CN200610116703 A CN 200610116703A CN 1932532 A CN1932532 A CN 1932532A
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Abstract
The invention discloses a sensing pen to measure the electricity which includes the sensor, the modulation circuit, the indicating circuit, the power supply circuit and a signal amplifying/reactive circuit which is the regenerative oscillating circuit. The sensor detects the detected object and output the detecting signal to the signal amplifying/reactive circuit, then to output the regenerative oscillating signal which is modulated by the modulation circuit to output the control signal to the indicating circuit. The invention uses the buzzer and the LED lamp to determine the voltage or the relative distance between the detected object and the sensing neb, so the invention has the simple structure and low cost.
Description
Technical field
The present invention relates to a kind of test pencil, relate in particular to a kind of induction test pencil.
Background technology
Tradition test pencil great majority are contact type measurement voltage, and contact jaw exposed metal/bare metal part people and animals run into easy electric shock during measurement, bring certain hidden danger for gauger's personal safety; And generally with regard to neon bulb indication, it is more single stiff to indicate; Contact type measurement is big to tested electrified body influence, as run into high voltage, the measured body of little electric current, the little test pencil of internal resistance is just shunted it, drag down voltage, it is very big to have a strong impact on measurement result, error, and can't test the electrified body that is hidden in other interior of articles, can't learn and measure such as the inside cabling of wall, woodwork, machine and so on.
The product of present induction type test voltage is to have or not to come directing object whether charged with the pilot lamp light on and off only, height that can not directing object voltage; Be used in though the high product of part price is measured accurate on the product for civilian use because of too specialty is not easy to operate, complex structure, bulky being not easy are carried.
Summary of the invention
Technical matters to be solved by this invention provides the low and obvious induction test pencil of the height of instructed voltage of a kind of cost.
For solving the problems of the technologies described above, induction test pencil of the present invention comprises inductor, modulation circuit, indicating circuit and power circuit, it comprises that also a signal amplifies and feedback circuit, signal amplifies and feedback circuit is the positive feedback oscillatory circuit, described inductor detects measured object output detection signal to signal and amplifies and feedback circuit, output positive feedback oscillator signal after the amplification feedback of signal amplification and feedback circuit, the positive feedback oscillator signal outputs control signals to indicating circuit after the modulation of modulation circuit.
Described indicating circuit is the acousto-optic indicating circuit preferably, is controlled the duty of acousto-optic indicating circuit by the control signal of modulation signal output.Described modulation circuit can be a multivibrator, and multivibrator is amplified by signal and the feedback signal of feedback circuit output is controlled.
Described signal amplifies and feedback I circuit comprises not gate, resistance and electric capacity, and three not gate T1A, T1B, T1C are connected in series step by step, and the output of first order not gate T1A feeds back to the input end of first order not gate T1A simultaneously by a feedback circuit; The output terminal of first order not gate T1A connects an end of capacitor C 5, and the output terminal of third level not gate T1C connects the other end of capacitor C 5, and not gate T1A, the discharge of T1B level are constituted the positive feedback vibration.
The present invention has following good effect: adopted hummer and the dual prompting of LED lamp, realization controls the size of hummer pronunciation by the size of the feedback signal of signal amplification and feedback circuit after ovennodulation or the frequency and the brightness of LED lamp flicker is judged the big or small of testee voltage or judged testee and the relative distance of induction nib, and with respect to the surveying instrument of specialty, its simple in structure and, cost is low, whole electronic circuit can be integrated, volume is little, is easy to carry.
Below in conjunction with drawings and Examples technology contents of the present invention is described further.
Description of drawings
Fig. 1 is the circuit block diagram of induction test pencil of the present invention.
Fig. 2 is the circuit theory diagrams of an embodiment of the present invention.
Embodiment
As shown in Figure 1, induction test pencil provided by the invention comprises that inductor, signal amplify and feedback circuit I, modulation circuit I I, indicating circuit III and power circuit IV, inductor detects measured object and output detection signal to signal amplifies and feedback circuit I, feed back to modulation circuit I I through signal amplification and feedback circuit I amplification, modulation circuit outputs control signals to indicating circuit III after feedback signal is modulated.Signal amplification in the present embodiment and feedback circuit I are the positive feedback oscillatory circuits.
As shown in Figure 2, in the above-described embodiments, signal amplifies and feedback circuit I comprises not gate, resistance and electric capacity, and three not gate T1A, T1B, T1C are connected in series step by step, and the output of first order not gate T1A feeds back to the input end of first order not gate T1A simultaneously by a feedback circuit; The output terminal of first order not gate T1A connects an end of capacitor C 5, and the output terminal of third level not gate T1C connects the other end of capacitor C 5, and not gate T1A, the discharge of T1B level are constituted the positive feedback vibration; Described modulation circuit I I one forms a multivibrator by resistance R 7, R8 and capacitor C 6 and two not gate T1E, T1F; Indicating circuit III one comprises the acousto-optic indicating circuit of hummer and LED lamp, by the control signal control hummer of modulation signal output and the duty of LED lamp.Resistance R 2 and capacitor C 4 in present embodiment Fig. 2 play anti-interference effect.
In the foregoing description, it is AAA that power unit IV circuit adopts two joint specifications, the 1.5V battery, and by capacitor C 1, C2 filtering.
Inductor detects measured object and output detection signal to signal amplifies and feedback circuit I when operating test pencil provided by the invention, the alternating current impression signal enters first order not circuit T1A by resistance R 1, through after the anti-phase amplification, signal one tunnel is directly coupled to second level not gate T1B, signal is directly coupled to third level not gate T1C through anti-phase amplification again, transport to capacitor C 5 after anti-phase, to capacitor C 5 chargings; The output of first order not gate T1A feeds back to the input end of first order not gate T1A through resistance R 4; The other end of capacitor C 5 connects the output terminal of first order not gate T1A, by the output of first order not gate T1A its other end is charged.Induced signal is through three grades of anti-phase output terminal outputs from third level not gate T1C, and 5 chargings to capacitor C are full of the back T1A, the discharge of T1B level are constituted the positive feedback vibration.Signal amplifies and the positive feedback oscillator signal of feedback circuit I output impels the multivibrator of modulation circuit I I to start, modulating frequency is arranged on people's ear earshot, be 20-20KHZ, the signal of sensing along with inductor strengthens, the positive feedback oscillator signal is also strong more, the multivibrator vibration is strong more, otherwise also weak more, non-inductive signal is with regard to failure of oscillation.The signal that modulation circuit is partly exported drives the triode T2 of acousto-optic indicating circuit, and hummer and light emitting diode negative electricity horizontal drawing is low, and the signal of variation makes sound and light also change indicating status simultaneously.
Claims (5)
1, a kind of induction test pencil, comprise inductor, modulation circuit, indicating circuit and power circuit, it is characterized in that: comprise that also a signal amplifies and feedback circuit (I), signal amplifies and feedback circuit (I) is the positive feedback oscillatory circuit, described inductor detects measured object output detection signal to signal and amplifies and feedback circuit (I), output positive feedback oscillator signal after the amplification feedback of signal amplification and feedback circuit (I), the positive feedback oscillator signal outputs control signals to indicating circuit (III) after the modulation of modulation circuit (II).
2, induction test pencil according to claim 1, it is characterized in that: described modulation circuit (II) comprises a multivibrator of being made up of resistance (R7, R8), electric capacity (C6) and two not gates (T1E, T1F), and multivibrator is amplified by signal and the positive feedback oscillator signal control of feedback circuit (I) output starts.
3, induction test pencil according to claim 1 and 2, it is characterized in that: described signal amplifies and feedback circuit (I) comprises not gate, resistance and electric capacity, three not gates (T1A, T1B, T1C) are connected in series step by step, and the output of first order not gate (T1A) feeds back to the input end of first order not gate (T1A) simultaneously by a feedback circuit; The output terminal of first order not gate (T1A) connects an end of electric capacity (C5), and the output terminal of third level not gate (T1C) connects the other end of electric capacity (C5), and discharge constitutes the positive feedback vibration to not gate (T1A, T1B) level.
4, induction test pencil according to claim 1 and 2 is characterized in that: described indicating circuit (III) is the acousto-optic indicating circuit, comprises hummer and LED lamp, by the control signal control hummer of modulation signal output and the duty of LED lamp.
5, induction test pencil according to claim 3 is characterized in that: described indicating circuit (III) is the acousto-optic indicating circuit, comprises hummer and LED lamp, by the control signal control hummer of modulation signal output and the duty of LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610116703 CN1932532A (en) | 2006-09-26 | 2006-09-26 | Induction test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610116703 CN1932532A (en) | 2006-09-26 | 2006-09-26 | Induction test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1932532A true CN1932532A (en) | 2007-03-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610116703 Pending CN1932532A (en) | 2006-09-26 | 2006-09-26 | Induction test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1932532A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021874A (en) * | 2015-07-28 | 2015-11-04 | 苏州南光电子科技有限公司 | Electronic test pencil based on induction detection circuit |
| CN107076785A (en) * | 2014-09-22 | 2017-08-18 | 泛达公司 | One kind is used for the non-existent system of verifying voltage |
| CN108603902A (en) * | 2016-02-06 | 2018-09-28 | 深圳华盛昌机械实业有限公司 | Induction type test pencil and application method |
| CN111833574A (en) * | 2020-07-14 | 2020-10-27 | 广东格美淇电器有限公司 | Voltage induction type alarm device and alarm method thereof |
-
2006
- 2006-09-26 CN CN 200610116703 patent/CN1932532A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107076785A (en) * | 2014-09-22 | 2017-08-18 | 泛达公司 | One kind is used for the non-existent system of verifying voltage |
| CN107076785B (en) * | 2014-09-22 | 2019-11-26 | 泛达公司 | A kind of system being not present for verifying voltage |
| CN105021874A (en) * | 2015-07-28 | 2015-11-04 | 苏州南光电子科技有限公司 | Electronic test pencil based on induction detection circuit |
| CN108603902A (en) * | 2016-02-06 | 2018-09-28 | 深圳华盛昌机械实业有限公司 | Induction type test pencil and application method |
| CN111833574A (en) * | 2020-07-14 | 2020-10-27 | 广东格美淇电器有限公司 | Voltage induction type alarm device and alarm method thereof |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20070321 |