CN201126446Y - Approximation test pencil - Google Patents
Approximation test pencil Download PDFInfo
- Publication number
- CN201126446Y CN201126446Y CNU2007200889872U CN200720088987U CN201126446Y CN 201126446 Y CN201126446 Y CN 201126446Y CN U2007200889872 U CNU2007200889872 U CN U2007200889872U CN 200720088987 U CN200720088987 U CN 200720088987U CN 201126446 Y CN201126446 Y CN 201126446Y
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- CN
- China
- Prior art keywords
- gate
- test pencil
- resistance
- near test
- acousto
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to an ''approach test pencil'' which is capable of detecting whether the object to be detected is charged only by approaching the object without contacting with the object. The test pencil is composed of an electromagnetic sensing head, a voltage gain device, a level controller, a multivibrator and an acousto-optic notification device, wherein, the electromagnetic sensing head is made of alloy material with high quality, high conductivity and high magnetic permeability; the voltage gain device is composed of a capacitor C, a NOT gate N1 and three resistors R1, R2, R3; the level controller is composed of two NOT gates N2 and N3, a diode VD and a dynatron VT; the acousto-optic notification device is composed of a buzzer HA, a light emitting diode LED1 and a resistor R4; and the multivibrator is an integrated chip. Compared with the traditional contact type test pencil, the utility model has advantages of high performance/price ratio, strong practicability, small size, portable convenience, and no safety hidden trouble.
Description
Technical field
The utility model relates to test pencil, particularly near test pencil.
Background technology
Be used in the reality inspected object whether have the electricity traditional test pencil be the test pencil of contact, be that this test pencil must contact testee, could detect and judge whether testee is charged, therefore not only in the inconvenience of many checkout area closing operations, and, there is potential safety hazard because the hand-held test pencil of tester contacts with tested charged object.So, develop easy to operate and safe and reliable test pencil and not only have theoretical significance, and have actual application value, purpose and background that this comes out near test pencil just.
The utility model content
Technical problem to be solved in the utility model is: by innovative design, provide a kind of near test pencil, to overcome and to solve the problems of the technologies described above, realize safe and reliable and survey electricity operation easily.
The technical scheme that its technical matters of solving the utility model adopts is: comprise electromagnetism sensing head, voltage gain device, level controller, multivibrator and the acousto-optic device of notifying.Wherein: an end of electromagnetism sensing head is with the resistance R in the voltage gain device
1An end be connected, the other end is with the not gate N in the voltage gain device
1Input end, resistance R
2An end and resistance R
3These four end points of an end be connected; Not gate N in the level controller
2With not gate N
3, all same N of their input end
1Output terminal be connected; The feedback input end of multivibrator is with the diode V in the level controller
DAnode be connected, its output terminal is connected with the notify end of the hummer HA in the device of acousto-optic, the other end of HA is with cell switch S
b, resistance R
4And resistance R
5These four end points are connected; Acousto-optic is notified and also is provided with LED 1 in the device, and it is connected on resistance R
4End points and triode V
TCollector between.
The utility model is compared with traditional contact test pencil, has following major advantage:
One, safe in utilization: needn't contact testee during use, only need near testee, therefore, no matter whether charged testee is, all fool proof to surveying electric operator.
Its two, easy and simple to handle: as only to need near testee owing to needn't contact testee when surveying electricity,, especially when testee is not easy to contact, demonstrate this superiority more near test pencil so operate very easyly.
Its three, practical: as when surveying electricity, can to carry out acousto-optic and notify, therefore no matter detect, all can clearly learn and survey electric result at what environment.
Its four, be easy to carry: small and exquisite because of compact conformation, so be convenient to very much carry.
Its five, the cost performance height, market outlook are good.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
The utility model is a kind of near test pencil, comprises electromagnetism sensing head, voltage gain device, level controller, multivibrator and the acousto-optic device (see figure 1) of notifying.Wherein: an end of electromagnetism sensing head is with the resistance R in the voltage gain device
1An end be connected, the other end is with the not gate N in the voltage gain device
1Input end, resistance R
2An end and resistance R
3These four end points of an end be connected; Not gate N in the level controller
2With not gate N
3, all same N of their input end
1Output terminal be connected; The feedback input end of multivibrator is with the diode V in the level controller
DAnode be connected, its output terminal is connected with the notify end of the hummer HA in the device of acousto-optic, the other end of HA is with cell switch S
b, resistance R
4And resistance R
5These four end points are connected; Acousto-optic is notified and also is provided with LED 1 in the device, and it is connected on resistance R
4End points and triode V
TCollector between.
Described electromagnetism sensing head can be made by the high duty alloy material of high conductivity and high magnetic permeability, be old-fashioned in early days (sixties in 20th century) stylographic written shape, and its length can be stretched, and is telescopic nib, and it is in light weight, size is little and structure is very compact.Described multivibrator can adopt 74121 integrated chips.
The utility model is described in further detail below in conjunction with Fig. 1, but do not limit the utility model.
Voltage gain device of the present utility model can be by a capacitor C, a not gate N
1And resistance R
1, resistance R
2And resistance R
3Constitute, wherein: R
1An end be connected R with an end of electromagnetism sensing head
1The same R of the other end
2An end and the end of C be connected; R
2The same resistance R of the other end
3An end and N
1Input end (1 end) and these four end points of the other end of electromagnetism sensing head be connected; R
3Another termination " "; The other end of C also connect " "; N
1Output terminal (2 end) with the not gate N in the level controller
2Input end (3 end) and not gate N
3Input end (5 end) be connected.R
3Be potentiometer, plant, can change the notify sensitivity of device of acousto-optic of the present utility model by regulating its resistance.
Level controller of the present utility model comprises that two not gates are not gate N
2With not gate N
3, diode V
DAnd triode V
TWherein: as mentioned above, N
2Input end (3 end) and N
3The same N of input end (5 end)
1Output terminal (2 end) be connected and N
2Output terminal (4 end) with diode V
DNegative electrode be connected V
DAnode be connected N with the feedback input end (7 end) of multivibrator
3Output terminal (6 end) with triode V
TBase stage be connected V
TEmitter connect " ", V
TCollector be connected with notify LED 1 negative electrode of device of acousto-optic.
The acousto-optic of the present utility model device of notifying comprises a LED 1 (it characterizes testee electricity is arranged in the mode of flicker ruddiness, and characterizing testee when LED1 is luminous does not have), piezoelectric buzzer HA and resistance R
4Wherein: as mentioned above, HA one end is connected with multivibrator output terminal (8 end), the same R of the other end of HA
4An end and resistance R
5An end and battery power switch S
bThese four end points of an end be connected R
4The other end is connected with the anode of LED 1.R
5The other end be connected S with the anode of LED 2 (battery supply pilot lamp)
bThe other end is with 3V button cell E
BThe positive pole of (working power of this test pencil circuit) is connected E
BNegative pole connect " ".
The not gate N that the utility model adopted
1, not gate N
2With not gate N
3Be integrated device, and available with three not gates in a slice integrated circuit (IC) chip, and for example available 7414 integrated chips substitute.
Triode V of the present utility model
TCan select S9013 or 3DG9013 type NPN silicone tube for use.LED 1 and LED2 all can select Φ 3mm light emitting diode for use, and the former selects red light emitting diodes for use, and the latter selects green LED for use.
Whether the utility model is a kind of contactless test pencil, only needs during use it near testee, just can detect testee and have and needn't contact testee.Concrete principle of work is as follows:
Referring to Fig. 1: closed battery supply E
BSwitch S
bAfter, LED2 lights green light, and LED1 is not luminous, and HA is sounding not; During detection, with electromagnetism sensing head (and can rock) near testee, if testee has, then the electromagnetism sensing head can sense the faint electromagnetic field signal of " having " and be transformed into voltage signal (being high level), this signal is after the voltage gain device amplifies shaping, open multivibrator and the acousto-optic device of notifying by level controller, the oscillator oscillatory work, the LED1 ruddiness that glimmers, HA sends the sound, characterizes testee band (having), otherwise (being that testee does not have), level controller blocks multivibrator and the acousto-optic device of notifying, and no sound and light signal sends, and the sign testee is not charged.The time spent does not disconnect S
b, LED2 go out (not luminous).
Claims (10)
1. one kind near test pencil, it is characterized in that comprising electromagnetism sensing head, voltage gain device, level controller, multivibrator and the acousto-optic device of notifying, and wherein: an end of electromagnetism sensing head is with the resistance R in the voltage gain device
1An end be connected, the other end is with the not gate N in the voltage gain device
1Input end, resistance R
2An end and resistance R
3These four end points of an end be connected; Not gate N in the level controller
2With not gate N
3, all same N of their input end
1Output terminal be connected; The feedback input end of multivibrator is with the diode V in the level controller
DAnode be connected, its output terminal is connected with the notify end of the hummer HA in the device of acousto-optic, the other end of HA is with cell switch S
b, resistance R
4And resistance R
5These four end points are connected; Acousto-optic is notified and also is provided with LED 1 in the device, and it is connected on resistance R
4End points and triode V
TCollector between.
2. as claimed in claim 1 near test pencil, it is characterized in that: the electromagnetism sensing head is made by the high duty alloy material of high conductivity and high magnetic permeability, be stylographic written shape, and this nib can be stretched.
3. as claimed in claim 1 near test pencil, it is characterized in that the voltage gain device is by a capacitor C, not gate N
1And resistance R
1, R
2, R
3Constitute, wherein: the same R of an end of capacitor C
1And R
2The tie point of these two resistance is connected, another termination of capacitor C " "; R
2The same R of the other end
3An end and not gate N
1Input end and these four end points of the other end of electromagnetism sensing head be connected R
3The other end " ground connection ".
4. as claimed in claim 3 near test pencil, it is characterized in that: resistance R
3Be potentiometer.
5. as claimed in claim 1 near test pencil, it is characterized in that level controller comprises not gate N
2With not gate N
3, diode V
DAnd triode V
T, wherein: not gate N
2With not gate N
3Output terminal respectively with diode V
DNegative electrode and triode V
TBase stage be connected V
TEmitter connect " ".
6. as claim 1 or 3 or 5 described, it is characterized in that: not gate N near test pencil
1, not gate N
2With not gate N
3Be integrated device.
7. as claimed in claim 6 near test pencil, it is characterized in that: described not gate N
1, not gate N
2With not gate N
3, the integrated chip that is contained 3 above not gates by a slice replaces.
8. as claimed in claim 7 near test pencil, it is characterized in that: described integrated chip is 7414 integrated chips.
9. as claimed in claim 1 near test pencil, it is characterized in that: multivibrator adopts 74121 integrated chips.
10. as claimed in claim 1 near test pencil, it is characterized in that acousto-optic notifies device by a LED 1, a piezoelectric buzzer HA and a resistance R
4Form, wherein: LED 1 is connected on resistance R
4End points and triode V
TCollector between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200889872U CN201126446Y (en) | 2007-12-13 | 2007-12-13 | Approximation test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200889872U CN201126446Y (en) | 2007-12-13 | 2007-12-13 | Approximation test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201126446Y true CN201126446Y (en) | 2008-10-01 |
Family
ID=39999914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200889872U Expired - Fee Related CN201126446Y (en) | 2007-12-13 | 2007-12-13 | Approximation test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201126446Y (en) |
Cited By (2)
| 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 |
| 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 |
-
2007
- 2007-12-13 CN CNU2007200889872U patent/CN201126446Y/en not_active Expired - Fee Related
Cited By (3)
| 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 |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |