CN216082906U - High-sensitivity passive flash test pencil - Google Patents
High-sensitivity passive flash test pencil Download PDFInfo
- Publication number
- CN216082906U CN216082906U CN202121207032.0U CN202121207032U CN216082906U CN 216082906 U CN216082906 U CN 216082906U CN 202121207032 U CN202121207032 U CN 202121207032U CN 216082906 U CN216082906 U CN 216082906U
- Authority
- CN
- China
- Prior art keywords
- resistor
- diode
- light emitting
- test pencil
- emitting diode
- 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.)
- Active
Links
Images
Landscapes
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
The utility model relates to a high-sensitivity passive flash test pencil, and belongs to the technical field of electrical equipment. The test pencil comprises a test end TOP and a metal contact piece S, and further comprises: a resistor R01, a resistor R02, a resistor R11, a diode D11, a diode D22, a light emitting diode LED11, a light emitting diode LED12, a light emitting diode LED22, a capacitor C11 and a diac D12; the test pencil is a passive test pencil, overcomes the problems of high current and low sensitivity of the traditional neon tube test pencil, and possible protection tripping to cause power system accidents, and is easy to popularize and apply.
Description
Technical Field
The utility model belongs to the technical field of electricity measuring equipment, and particularly relates to a high-sensitivity passive flash test pencil.
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.
The conventional neon tube test pencil has high current and low sensitivity, and can cause protection tripping to cause an accident event of a power system. At present, most test pens can work only by depending on batteries. Therefore, how to overcome the defects of the prior art is a problem which needs to be solved urgently in the technical field of the current electricity testing equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a high-sensitivity passive flash test pencil.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a high-sensitivity passive flash test pencil comprises a test end TOP and a metal contact piece S, and further comprises: a resistor R01, a resistor R02, a resistor R11, a diode D11, a diode D22, a light emitting diode LED11, a light emitting diode LED12, a light emitting diode LED22, a capacitor C11 and a diac D12;
the testing end TOP is connected with one end of the resistor R01; the other end of the resistor R01 is respectively connected with the anode of the diode D11 and the cathode of the diode D22; the anode of the diode D22 is connected with the cathode of the light-emitting diode LED 22;
the cathode of the diode D11 is connected with the anode of the LED 11;
the cathode of the light emitting diode LED11 is respectively connected with one end of the capacitor C11 and one end of the bidirectional trigger diode D12;
the other end of the bidirectional trigger diode D12 is connected with the anode of a light-emitting diode LED 12;
the cathode of the light emitting diode LED12 is connected with one end of the resistor R11; the other end of the resistor R11, the other end of the capacitor C11 and the anode of the light emitting diode LED22 are connected with one end of a resistor R02; the other end of the resistor R02 is connected to the metal contact sheet S.
Further, it is preferable that each of the light emitting diodes LED11 and LED12 is a red light emitting diode.
Further, it is preferable that the light emitting diode LED22 is a green light emitting diode.
Further, the resistance values of the resistor R01 and the resistor R02 are preferably 5.1M, respectively.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the high-sensitivity passive flash test pencil has a novel structure, is convenient to use, adopts two resistors R01 and R02, and improves the safety of a circuit, and the resistance values are respectively 5.1M.
(2) The utility model skillfully adopts the long charging time (about 195 mS) of the bidirectional capacitor C11, can store a large amount of electric energy, and the short discharging time (about 5 mS) ensures that the discharging current reaches about 20 times of the charging current, so the high brightness is very high when the LED12 flashes.
(3) The test pencil is a passive test pencil, overcomes the problems of high current and low sensitivity of the traditional neon tube test pencil, and possible protection tripping to cause power system accidents, and is easy to popularize and apply.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the high-sensitivity passive flash test pencil of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the utility model only and should not be taken as limiting the scope of the utility model. The specific techniques, connections, conditions, or the like, which are not specified in the examples, are performed according to the techniques, connections, conditions, or the like described in the literature in the art or according to the product specification. The materials, instruments or equipment are not indicated by manufacturers, and all the materials, instruments or equipment are conventional products which can be obtained by purchasing.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" as used herein may include wirelessly connected. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "provided" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention are understood according to specific situations.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As shown in fig. 1, a high-sensitivity passive flash test pencil includes a test terminal TOP and a metal contact sheet S, and further includes: a resistor R01, a resistor R02, a resistor R11, a diode D11, a diode D22, a light emitting diode LED11, a light emitting diode LED12, a light emitting diode LED22, a capacitor C11 and a diac D12;
the testing end TOP is connected with one end of the resistor R01; the other end of the resistor R01 is respectively connected with the anode of the diode D11 and the cathode of the diode D22; the anode of the diode D22 is connected with the cathode of the light-emitting diode LED 22;
the cathode of the diode D11 is connected with the anode of the LED 11;
the cathode of the light emitting diode LED11 is respectively connected with one end of the capacitor C11 and one end of the bidirectional trigger diode D12;
the other end of the bidirectional trigger diode D12 is connected with the anode of a light-emitting diode LED 12;
the cathode of the light emitting diode LED12 is connected with one end of the resistor R11; the other end of the resistor R11, the other end of the capacitor C11 and the anode of the light emitting diode LED22 are connected with one end of a resistor R02; the other end of the resistor R02 is connected to the metal contact sheet S.
Preferably, each of the light emitting diodes LED11 and LED12 is a red light emitting diode.
Preferably, the light emitting diode LED22 is a green light emitting diode.
Preferably, the resistance values of the resistor R01 and the resistor R02 are 5.1M, respectively.
The principle of the utility model is as follows:
(1) in fig. 1, TOP is a test terminal, S is a metal contact sheet on a test pencil, R01, R02, and R11 are resistors, D11 and D22 are diodes, LED11 and LED12 are high-sensitivity red light emitting diodes, LED22 is high-sensitivity green light emitting diode, C11 is a capacitor, and D12 is a diac.
(2) The test terminal TOP, the resistor R01, the diode D11, the light-emitting diode LED11, the diode D12, the light-emitting diode LED12, the resistor R11, the resistor R02 and the metal contact piece S are current paths for measuring forward voltage by the test pencil. When the forward voltage is measured, a tiny current flows through TOP → TOP → R01 → D11 → LED11 → C11 → R02 → S, after about 195mS, the voltage on the capacitor C11 can reach 33V, the diac D12 breaks down, the capacitor C11 discharges through the diac D12, the LED12 and the resistor R11, the discharge time is about 5mS, and the flash brightness of the LED12 is very high and very striking. During the charging and discharging of the capacitor C11, the LED11 is all passed by microwave current, and the LED11 is illuminated at the same time, indicating that a positive potential is measured.
(3) The test terminal TOP, the resistor R01, the diode D22, the light-emitting diode LED22, the resistor R02 and the metal contact piece S are current paths for measuring negative voltage by the test pencil. When measuring the negative voltage, a small current flows through S → R02 → LED22 → D22 → R01 → TOP, and the LED22 emits green light, indicating that a negative potential is measured.
(4) In the circuit, two resistors R01 and R02 are adopted, and the resistance values are respectively 5.1M, so that the safety of the circuit is improved.
(5) The circuit skillfully adopts the bidirectional capacitor C11, the charging time is long (about 195 mS), a large amount of electric energy can be stored, the discharging time is short (about 5 mS), and the discharging current reaches about 20 times of the charging current, so the high brightness is high when the LED12 flashes.
(6) In the figure, R11 is set to limit the discharge current of the LED12, and too small a resistance value may cause the discharge current of the LED12 to be too large and burn out, and too large a resistance value may cause the brightness of the LED12 to be too small.
(7) The circuit is a passive test pencil, and overcomes the defects of high current, low sensitivity and possibility of causing protection tripping to cause power system accident in the conventional neon tube test pencil.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (4)
1. A high-sensitivity passive flash test pencil comprises a test end TOP and a metal contact piece S, and is characterized by further comprising: a resistor R01, a resistor R02, a resistor R11, a diode D11, a diode D22, a light emitting diode LED11, a light emitting diode LED12, a light emitting diode LED22, a capacitor C11 and a diac D12;
the testing end TOP is connected with one end of the resistor R01; the other end of the resistor R01 is respectively connected with the anode of the diode D11 and the cathode of the diode D22; the anode of the diode D22 is connected with the cathode of the light-emitting diode LED 22;
the cathode of the diode D11 is connected with the anode of the LED 11;
the cathode of the light emitting diode LED11 is respectively connected with one end of the capacitor C11 and one end of the bidirectional trigger diode D12;
the other end of the bidirectional trigger diode D12 is connected with the anode of a light-emitting diode LED 12;
the cathode of the light emitting diode LED12 is connected with one end of the resistor R11; the other end of the resistor R11, the other end of the capacitor C11 and the anode of the light emitting diode LED22 are connected with one end of a resistor R02; the other end of the resistor R02 is connected to the metal contact sheet S.
2. The high-sensitivity passive flash test pencil of claim 1, wherein the light emitting diodes LED11 and LED12 are red light emitting diodes.
3. The high-sensitivity passive flash test pencil of claim 1 wherein the LED22 is a green LED.
4. The high-sensitivity passive flash test pencil of claim 1, wherein the resistances of the resistor R01 and the resistor R02 are 5.1M, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121207032.0U CN216082906U (en) | 2021-06-01 | 2021-06-01 | High-sensitivity passive flash test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121207032.0U CN216082906U (en) | 2021-06-01 | 2021-06-01 | High-sensitivity passive flash test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216082906U true CN216082906U (en) | 2022-03-18 |
Family
ID=80662984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121207032.0U Active CN216082906U (en) | 2021-06-01 | 2021-06-01 | High-sensitivity passive flash test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216082906U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024055366A1 (en) * | 2022-09-13 | 2024-03-21 | 云南电网有限责任公司楚雄供电局 | Passive tester pen capable of indicating polarity of measured potential |
-
2021
- 2021-06-01 CN CN202121207032.0U patent/CN216082906U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024055366A1 (en) * | 2022-09-13 | 2024-03-21 | 云南电网有限责任公司楚雄供电局 | Passive tester pen capable of indicating polarity of measured potential |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216082906U (en) | High-sensitivity passive flash test pencil | |
| CN203631886U (en) | Data line capable of displaying charging states | |
| CN216082905U (en) | Multifunctional test pencil | |
| CN211785879U (en) | Low-power-consumption universal on-off tester | |
| CN214310671U (en) | Intelligent electric power electronic electricity measuring device | |
| CN205539160U (en) | Multi -functional high security test pencil | |
| CN208076557U (en) | A kind of multi-functional automobile-used test pen | |
| CN216595456U (en) | Test pen for measuring on-off of circuit | |
| CN201697972U (en) | Test pencil | |
| CN217639260U (en) | Test pencil | |
| CN219392156U (en) | Novel alternating current/direct current dual-purpose test pencil | |
| CN203275505U (en) | LED flash electroprobe | |
| CN205049646U (en) | Multi -functional electrography of admant response digital display | |
| CN219799718U (en) | Control cable detection device | |
| CN110058072A (en) | A kind of electroscope with contact detection | |
| CN204203418U (en) | LED tests tweezer | |
| CN215812906U (en) | Novel insulation measurement is with taking insulating rod area illumination contact | |
| CN219266402U (en) | Alternating current/direct current dual-purpose ammeter circuit | |
| CN85202961U (en) | Screw-driver with voltage tester beingable to test conductor separating insulating barrier | |
| CN212060418U (en) | Portable multifunctional electroprobe | |
| CN208314127U (en) | Ceramic tube discharging detection device | |
| CN218412694U (en) | Direct contact and non-contact compatible test pencil | |
| CN206990667U (en) | A kind of voltage test pencil | |
| CN213689756U (en) | Multipurpose test pencil | |
| CN216646609U (en) | Touch optical coupler direct current detector module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |