CN2130265Y - Load storage energy electronic electricity test pen - Google Patents

Abstract

The utility model discloses an electronic electricity test pen with a load and energy storage, which is additionally provided with an energy storage circuit II, and a resistance-capacitance testing circuit III based on the original low-impedance voltage indicating circuit I. When the voltage is tested, the energy storage voltage is charged with energy storage to provide enough electrical energy for the resistance-capacitance testing circuit. Besides the function of the voltage test, the utility model can realizes multi practical functions of the test of resistance, capacitance, etc. without the need of the built-in power supply. The utility model which is an ideal testing tool for families and electric workers maintains the advantages, of the traditional electricity test pen, of simple structure, small size, convenient carrying, low price and practicability.

Description

Load storage energy electronic electricity test pen

The utility model relates to a kind of test pencil, and is particularly a kind of except that the voltage detecting function with general test pencil, also has the electronic test pencil that detects resistance, capacitive function.

In the electric testing of reality, the electrician often needs to carry multiple testing tools such as test pencil, a cluster of lamps, ornamental, multimeter simultaneously, carries and operate all extremely inconvenience, and ascend operation is inconvenience more then.A kind of form of a stroke or a combination of strokes electronic digital type multimeter with multiple measuring ability has appearred in international market in recent years, but it embodies than the big several times of neon tube test pencil, and cost an arm and a leg, and since function cause too much use numerous and diverse, so and be not suitable for being extensive use of of general electric maintainer.The applicant discloses a kind of " electronic voltage tester with two probes " in Chinese patent CN91200155.0, this test pencil is except that the neon tube with traditional approach electroprobe is surveyed voltage function, also can detect point to point relative voltage and voltage range, but it still can not detect resistance and electric capacity, and usable range is subjected to certain limitation.

The utility model is improved at the deficiencies in the prior art, and purpose is to provide a kind of and detects the voltage function except that having, and also has the load energy storage electronic test pencil that detects resistance, capacitive function and do not need built-in power.

The utility model comprises the voltage indicating circuit that main probe A, low-impedance voltage indicating circuit I, probe B serial connection form, be characterized in that its composition also includes tank circuit II, resistance capacitance testing circuit III and probe C, wherein the tank circuit II is connected in series in the voltage detecting circuit, its discharge end P is connected with an end of resistance capacitance testing circuit III, the resistance capacitance testing circuit III other end is connected with probe C, as shown in Figure 1; Perhaps tank circuit II and resistance capacitance testing circuit III are connected in series in the voltage detecting circuit, and the discharge end P of tank circuit II is connected with probe C, as shown in Figure 2.The utility model principle of work is as follows: when needs detect certain point to point and whether have relative voltage, use main probe A and probe B respectively 2 of contact measured just can measure, in main probe A and probe B detection voltage, the energy storage of working simultaneously of tank circuit II is in order to the usefulness of the power supply of supplying with resistance capacitance testing circuit III.When need detect resistance or electric capacity, then use probe B and probe C, this moment probe B, tank circuit II, resistance capacitance testing circuit III and probe C form a loop, can detect certain point-to-point transmission resistance or electric capacity, the tank circuit II that stores energy this moment becomes the built-in power in loop, thereby guarantees to detect required electric energy.

Above-mentioned low-impedance voltage indicating circuit I is preferably by width voltage indication branch road I ₁With rated voltage indication branch road I ₂The low-impedance voltage classification indicating circuit that is formed in parallel is so that the gradable value range of measuring certain point to point voltage.

For making the utility model complete function, it can be provided with the neon tube indicating circuit IV of being made up of main probe A, high value current-limiting resistance R, neon tube N and hand touched electrode H simultaneously, to keep the function of traditional test pencil.

Because this test pencil mainly is to be used for testing goal, the normal requirement of probe directly contacts with tested measuring point lead, so main probe A, probe B, probe C are preferably pin type and pop one's head in.

The utility model detects resistance, electric capacity except that detecting the voltage under also can inscribing before power-source free, be skillfully constructed.Expanded the purposes of test pencil, and it is simple in structure to keep traditional test pencil simultaneously, volume is little, inexpensive characteristics, and it uses the operation simple and convenient, and one-object-many-purposes is easy to carry, and is the testing tool that family, electrician author are desirable, have practical value.

Fig. 1 is one of the utility model circuit block diagram;

Fig. 2 is two of the utility model circuit block diagram;

Fig. 3 is embodiment 1 electrical schematic diagram;

Fig. 4 is the example structure synoptic diagram;

Fig. 5 is embodiment 2 electrical schematic diagrams.

Embodiment 1: the present embodiment electrical schematic diagram includes low-impedance voltage indicating circuit I, tank circuit II, resistance capacitance detection resistance III and neon tube indicating circuit IV shown in Fig. 1,3, and low-impedance voltage indicating circuit I is by width voltage indication branch road I ₁With rated voltage indication branch road I ₂The low-impedance voltage classification indicating circuit that is formed in parallel, wherein width voltage indication branch road I ₁Formed by shared current-limiting resistance R1, resistance R 2, light emitting diode L1 serial connection, wherein light emitting diode L1 just is being connected on the circuit; Rated voltage indication branch road I ₂Form by shared current-limiting resistance R1, light emitting diode L2 and by the combination switch G1G2 serial connection that two triodes are formed, wherein light emitting diode L2 just is being connected on the circuit, the base stage of combination switch G1G2 is serially connected with adjustable biasing resistance R4 and biasing resistance R3, and wherein the biasing resistance R3 other end directly is connected with main probe A; Light emitting diode L1, L2 are parallel with reverse diode D1 in addition, and its effect is to prevent that circuit is reversed overvoltage and punctures.The tank circuit II is made up of diode D2, capacitor C, divider resistance R5, current-limiting resistance R6, and it is in parallel with divider resistance R5 that wherein diode D2 is connected in series the back with capacitor C, is connected in series with current-limiting resistance R6 more afterwards; Tank circuit II one end is connected with low-impedance voltage classification indicating circuit I, the other end is connected with probe B, when probe A contacts detected power supply with probe B, circuit I and circuit II are worked simultaneously, detected positive current is charged to capacitor C, because the capacity of capacitor C is big, leakage resistance is less, so only need that the time just contains more than the ten hour required electric energy of road III work of can powering slightly.Diode D2 has the effect that prevents the capacitor C back discharge, and R5 is a divider resistance, and effect is to make the capacitor C both end voltage obtain reasonable value, in order to avoid the element high-voltage breakdown.Current-limiting resistance R6 effect is the discharge current of restriction tank circuit, protects display tube and prolongs discharge time.Resistance capacitance testing circuit III is made up of mutual light emitting diode L3, L4 reverse and in parallel, and circuit III one end is connected with the discharge end P of tank circuit II, and the other end links to each other with probe C.When detecting the resistance (on-off road) of electric appliance circuits, probe B is contacted 2 tested points respectively with probe C, this moment, capacitor C became built-in power discharge work, if tested 2 paths, then L3 is luminous; As open circuit that then L3 is not luminous; The resistance measurement scope is generally 0～1N Ω.When if whether detection electric appliance metal shell leaks electricity, can be with probe C contact appliance circuit, probe B contacting metal shell is as electrical leakage (1N Ω is following), the then luminous demonstration of light emitting diode L3.If the electric capacity that detects capacitor is (during 0.05uF～50uF), probe C can be connected on capacitor one utmost point, probe B connects another utmost point of capacitor, if at this moment L3 has luminous demonstration of moment, then capacitor is intact, and roughly judges the electric capacity size of capacitor according to the L3 fluorescent lifetime; As L3 is that stabilized illumination shows the then breakdown short circuit of illustrated capacitor.If L3 does not have any flash of light, then illustrated capacitor lost efficacy.If when detecting 3～24V than low dc voltage probe B is connect "+" utmost point, probe C connects "-" utmost point (alternating current then not polarity), as the luminous demonstration of L4, then be DC voltage, in this way L3, the L4 while luminous, then be alternating voltage.Traditional neon tube indicating circuit IV can electrode H serial connection be formed by main probe A, high value current-limiting resistance R, neon tube N, hand, and its purposes and using method are with original identical.This exception shape structure as shown in Figure 4, form by main body (1), accessory body (2), probe C, main body (1) front end is provided with main probe A, neon tube indicating circuit IV and low-impedance voltage indicating circuit are arranged on main body (1) inner chamber, and wherein inditron L1, the L2 on low-impedance voltage classification indicating circuit I two branch roads is installed in the tail end of main body (1).Accessory body (2) front end is provided with probe B, and tank circuit II and resistance capacitance testing circuit III are arranged on accessory body (2) inner chamber, and wherein two inditron L3, the L4 on the resistance capacitance testing circuit III is arranged on the preceding facial planes of accessory body (2).Have lead to link to each other between main body (1) and accessory body (2), probe C is connected with accessory body (2) by lead, and promptly the three is in turn connected into one by lead.

Embodiment 2: for example shown in Fig. 2,5, composition, use and last example are basic identical for this, and the place of difference is that resistance capacitance testing circuit III also is connected in series in the voltage detecting circuit, and probe C then directly is connected with tank circuit II discharge end P.This mode of connection is when carrying out resistance or capacitance detecting, equally by probe B, tank circuit II, resistance capacitance testing circuit III, and probe C form the loop, when the benefit of this wiring is to detect voltage (probe A, probe B contact power supply), L3, L4 luminous demonstration also the time, increase indication brightness, and when detecting DC voltage, can detect electric power polarity.The tank circuit II has increased diode D3 in this example, and its reverse parallel connection is gone in the parallel circuit of being made up of the diode D2 of serial connection and capacitor C and divider resistance R5; Diode D3 plays reverse protection and reverse-conducting.This routine structure equally as shown in Figure 4.

Claims (10)

1, load energy storage electronics is surveyed pen, comprise the voltage detecting circuit that forms by main probe A, low-impedance voltage indicating circuit I and probe B serial connection, it is characterized in that its composition also includes the tank circuit II, resistance capacitance testing circuit III and probe C, wherein the tank circuit II is connected in series in the voltage detecting circuit, resistance capacitance testing circuit III one end is connected with tank circuit II discharge end P, and the other end is connected with probe C.

2, load energy storage electronic test pencil, comprise the voltage detecting circuit that forms by main probe A, low-impedance voltage indicating circuit I and probe B serial connection, it is characterized in that its composition also includes tank circuit II, resistance capacitance testing circuit III and probe C, wherein tank circuit II, resistance capacitance testing circuit III are connected in series in the voltage detecting circuit, and probe C is connected with the discharge end P of tank circuit II.

3, electronic test pencil according to claim 1 and 2 is characterized in that being provided with by main probe A, the neon tube indicating circuit IV that high value current-limiting resistance R, neon tube N and hand touched electrode H form.

4, electronic test pencil according to claim 1 and 2 is characterized in that above-mentioned low-impedance voltage indicating circuit I, is by width voltage indication branch road I ₁With rated voltage indication branch road I ₂The low-impedance voltage classification indicating circuit that is formed in parallel.

5, electronic test pencil according to claim 4 is characterized in that above-mentioned width voltage indication branch road I ₁Form above-mentioned rated voltage indication branch road I by shared current-limiting resistance R1, resistance R 2, light emitting diode L1 serial connection ₂Form by shared current-limiting resistance R1, light emitting diode L2 and by the combination switch point G1G2 serial connection that two triodes are formed, wherein the base stage of combination switch G1G2 is serially connected with adjustable biasing resistance R4 and biasing resistance R3, and the biasing resistance R3 other end is connected with main probe A.

6, electronic test pencil according to claim 4 is characterized in that described Low ESR classification indicating circuit I is parallel with reverse diode D1.

7, electronic test pencil according to claim 1 and 2, it is characterized in that described tank circuit II is made up of diode D2, capacitor C, divider resistance R5, current-limiting resistance R6, it is in parallel with divider resistance R5 that wherein diode D2 is connected in series the back with capacitor C, is connected in series with current-limiting resistance R6 more afterwards.

8, electronic test pencil according to claim 1 and 2 is characterized in that described resistance capacitance testing circuit III is made up of mutual light emitting diode L3, L4 reverse and in parallel.

9, electronic test pencil according to claim 7 is characterized in that described tank circuit II also is provided with diode D3, and its reverse parallel connection is gone in the parallel circuit of being made up of the diode D2 of serial connection and capacitor C and divider resistance R5.

10, electronic test pencil according to claim 1 and 2, it is characterized in that the test pencil profile is made up of main body (1), accessory body (2), probe C, wherein main body (1) front end is provided with main probe A, neon tube indicating circuit IV and low-impedance voltage indicating circuit I are arranged on main body (1) inner chamber, accessory body (2) front end is provided with probe B, tank circuit II and resistance capacitance testing circuit III are arranged on accessory body (2) inner chamber, and main body (1), accessory body (2) and probe C connect as one successively by lead.

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