CN2190303Y

CN2190303Y - Electronic energy-preserving tester

Info

Publication number: CN2190303Y
Application number: CN 93242351
Authority: CN
Inventors: 钟汝祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-14
Filing date: 1993-10-14
Publication date: 1995-02-22
Anticipated expiration: 2003-10-14

Abstract

The utility model relates to an electronic energy-preserving tester, which is composed of a main probe A, the first grading indicating circuit of the low impedance voltage, the second energy-preserving circuit, the third resistance-capacitance detecting circuit, a converting switch K, and the fourth indicating circuit of the neon tube. Since the converting switch K can play the functions of transmitting the measured voltage and the measured resistance and capacitance, accordingly, the number of the probes of the original technique is reduced, and the structure is simplified. Accordingly, under the precondition of the reserving the functions of the original measured voltage, resistance, and capacitance, the electronic energy-preserving tester can have the advantages of simple structure, low cost, convenient operation, convenient carrying, etc., and accordingly, the electronic energy-preserving tester has more practicability.

Description

Electronic energy-preserving tester

The utility model relates to a kind of electricity measurer, and is particularly a kind of except that the voltage function with general electricity measurer, also has the electronics electricity measurer of multiple functions such as detecting resistance, electric capacity and semiconductor.

In the electric testing of reality, the electrician often needs to carry simultaneously multiple testing tools such as test pencil, a cluster of lamps, ornamental, multimeter, carry and operate extremely inconvenient, 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 the existing big several times of neon tube test pencil of its volume ratio, and cost an arm and a leg, and owing to function use too much numerous and diverse, so and be not suitable for being extensive use of of general electric maintainer.The applicant discloses a kind of load energy storage electronic test pencil in Chinese patent CN922281890, this test pencil is except that the neon tube with traditional electroprobe is surveyed voltage function, also can detect point to point relative voltage and voltage range, and also have and detect resistance, capacitive function and do not need built-in power, but this test pencil probe is many, circuit is numerous and diverse, gives in production and the use and brings many inconvenience.

The utility model is improved at the deficiencies in the prior art, purpose is to provide a kind of and structurally more simplifies, inexpensive, use more convenient, can under the situation that does not need built-in power, can detect AC and DC voltage, can detect energy storage type electronics electricity measurer resistance, electric capacity and semiconductor element, that have practicality again simultaneously.

The utility model comprises by main probe A, the voltage detecting circuit that low-impedance voltage indicating circuit I and probe B serial connection form, be characterized in forming and also include switch K, tank circuit II and resistance capacitance testing circuit III, main termination master's probe A of switch K wherein, one contact a connects with an end of voltage indicating circuit I, tank circuit II and low-impedance voltage indicating circuit I are in parallel or connect between low-impedance voltage indicating circuit I and the probe B, resistance capacitance testing circuit III one end connects with the point of discharge P of tank circuit II, the other end connects with another contact b of switch K, as Fig. 1, shown in Figure 2.The utility model principle of work is as follows: when needs detect certain point-to-point transmission and whether have voltage, earlier switch K is dialled on the position of contact a, again with 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 for resistance capacitance testing circuit III provides built-in power; When needs detect resistance, electric capacity and semiconductor element, switch K is dialled on the position of contact b, with main probe A and probe B difference contact measured element two ends, main probe A, tank circuit II, resistance capacitance testing circuit III and probe B are formed a loop at this moment, can detect " the leading to " of resistance and the open circuit and the short circuit of " breaking " and capacitor, and can detect the unilateral conduction of semiconductor element, because switch K plays the effect of change-over circuit function in circuit, probe quantity is reduced, designs simplification, thus realize the purpose of this utility model.

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

For making the utility model complete function, can be provided with the neon tube indicating circuit IV that is composed in series by main probe A, high value current-limiting resistance R6, neon tube N and hand touched electrode H simultaneously, to keep the function of traditional survey voltage.

Because this electricity measurer is mainly used in testing goal, the normal requirement of probe directly contacts with tested measuring point lead, and main probe A, probe B are preferably the pin type probe.

The utility model is except that detecting the voltage, all right two probes and the power-source free preceding topic of only needing detects resistance, electric capacity and semiconductor element down, be skillfully constructed, both expanded the function of test pencil, and keep the characteristics that traditional test pencil is simple in structure, volume is little, inexpensive simultaneously, it uses operation simple and convenient, one-object-many-purposes, is easy to carry, and is the electrical instrument that family, electrician author are desirable, have practical value.

Fig. 1 is one of the utility model circuit block diagram, tank circuit II and the parallel connection of voltage indicating circuit I among the figure;

Fig. 2 is two of the utility model circuit block diagram, tank circuit II and voltage indicating circuit I coupled in series among the figure;

Fig. 3 is embodiment 1 electrical schematic diagram;

Fig. 4 is embodiment 2 electrical schematic diagrams;

Fig. 5 is the example structure synoptic diagram;

Embodiment 1: present embodiment electricity functional-block diagram as shown in Figure 1, circuit includes low-impedance voltage indicating circuit I, tank circuit II, resistance capacitance testing circuit III, switch K and neon tube indicating circuit IV as shown in Figure 3.The low-resistance voltage classification indicating circuit of low-impedance voltage indicating circuit I for being formed in parallel by width voltage indication branch road I 1 and rated voltage indication branch road I 2, wherein width voltage indication branch road I 1 is in series by shared current-limiting resistance R1, light emitting diode L1 and balance resistance R 2, and wherein light emitting diode L1 just is being connected on the circuit; Rated voltage indication branch road I 2 is in series by shared current-limiting resistance R1, light emitting diode L2 and switch triode G, wherein light emitting diode L2 just is being connected on the circuit, the base stage of switch triode G is serially connected with adjustable biasing resistance R4 and biasing resistance R3, wherein the biasing resistance R3 other end connects with the contact a of switch K, low-impedance voltage indicating circuit I is serially connected with forward diode D1, the tank circuit II is composed in series and is connected in parallel on the voltage detecting circuit two ends by shared current limliting resistance R1, backward dioded D2 and capacitor C, and switch K master end connects with main probe A.When K switch being dialled at contact a, can be used for detecting voltage with main probe A and probe B, when tested voltage during at 3-220V, have only light emitting diode L1 shinny, and its brightness size is directly proportional with tested voltage swing, and when tested voltage during near 380V, L1, L2 is simultaneously shinny, can distinguish two important voltage gradations of 220V and 380V like this (when needs are distinguished friendship, during DC voltage, exchange main probe A and probe B two check points on the basis of the above, if light emitting diode L1(L2) the also shinny alternating voltage that illustrates then that Here it is, if light emitting diode L1(L2) not shinnyly illustrate that then this is a DC voltage, and master's probe A institute measuring point is a positive polarity when light emitting diode L1(L2) shinny, and probe B institute measuring point is a negative polarity.When main probe A contacts tested voltage two ends with probe B, the tank circuit II is worked simultaneously, negative current is charged to capacitor C by diode D2, store electrical energy, because the capacity of C is big, it is less leak electricity, so only the main probe A of need contacts 220V voltage time slightly with probe B, just store the electric energy that the resistance capacitive detection circuit III of can powering repeatedly detects between Shun, diode D2 has the effect that prevents the capacitor C back discharge.Resistance capacitance testing circuit III is composed in series by discharge current-limiting resistance R5, light emitting diode L3, wherein the negative pole of L3 meets the point of discharge P of tank circuit II, the other end of current-limiting resistance R5 connects with another contact of switch K b, the effect of current-limiting resistance R5 is the discharge current of restriction tank circuit, protects display tube and prolongs discharge time; When using this circuit working, need switch K is dialled on the position of contact b, when detected element path, the luminous demonstration of light emitting diode L3; When detected element opened circuit, light emitting diode L3 can be not luminous.This example generally can detect resistance and the interior electric capacity of 0.01～500UF scope in 0～2M Ω scope.The neon tube indication is composed in series by main probe A, high value current-limiting resistance R6, neon tube N and hand touched electrode H by the circuit IV, and its purposes is identical with original test pencil with using method.

Present embodiment 1 structure as shown in Figure 5, form by main body (1), a pair body (2), the front end of main body (1) is provided with main probe A, be provided with voltage detecting circuit I, switch K, tank circuit II, resistance capacitance testing circuit III in main body (1) chamber, wherein the neon tube of neon tube indicating circuit IV is placed in the front end in main body (1) chamber, and low-impedance voltage classification indication branch road I 1, light emitting diode L1, the L2 of I 2 two branch roads, the light emitting diode L3 of capacitance-resistance testing circuit III are placed on the preceding facial planes of main body (1); Switch K is arranged on main body (1) side, pays body (2) and has only probe B, and main body (1) is connected with a pair body (2) by solid conductor and forms an integral body.

Embodiment 2: this routine electrical schematic diagram is shown in Fig. 2,4, it is basic identical with last example that it forms use, and difference is that tank circuit II and voltage detecting circuit I are to be in series, and diode D1 is connected in parallel on the voltage detecting circuit, become the negative sense conduction pipe, prevent that circuit is reversed over-voltage breakdown; A forward diode D3 in parallel becomes the forward conduction pipe on the tank circuit II, plays the effect that prevents circuit forward over-voltage breakdown.These routine characteristics are to improve the overvoltage protection ability of circuit component, and this routine structure equally as shown in Figure 5.

Claims

1, energy storage type electronics electricity measurer, comprise by main probe A, the voltage detecting circuit that low-impedance voltage indicating circuit I and probe B serial connection form, it is characterized in that forming and also include switch K, tank circuit II and resistance capacitance testing circuit III, main termination master's probe A of switch K wherein, one contact a connects with an end of voltage indicating circuit I, tank circuit II and low-impedance voltage indicating circuit I are in parallel or connect between low-impedance voltage indicating circuit I and the probe B, resistance capacitance testing circuit III one end connects with the point of discharge P of tank circuit II, and the other end connects with another contact b of switch K.

2, energy storage type electronics electricity measurer according to claim 1 is characterized in that also being provided with the neon tube indicating circuit IV that is composed in series by main probe A, high value current-limiting resistance R6, neon tube N, hand touched electrode H.

3, energy storage type electronics electricity measurer according to claim 1 is characterized in that low-impedance voltage indicating circuit I is the low-impedance voltage classification indicating circuit that is composed in parallel by width voltage indication branch road I 1 and rated voltage indication branch road I 2.

4, energy storage type electronics electricity measurer according to claim 3, it is characterized in that above-mentioned width voltage indication branch road I 1 is composed in series by shared current-limiting resistance R1, light emitting diode L1, balance resistance R2, above-mentioned rated voltage indication branch road I 2 is composed in series by shared current-limiting resistance R1, light emitting diode L2, switch triode G, wherein the base stage of switch triode G is serially connected with adjustable biasing resistance R4 and biasing resistance R3, and the biasing resistance R3 other end connects with the contact a of switch K.

5, energy storage type electronics electricity measurer according to claim 1 is characterized in that low-impedance voltage indicating circuit I is connected with diode D1, and its forward is connected in series into circuit or reverse parallel connection place in circuit.

6, energy storage type electronics electricity measurer according to claim 1, it is characterized in that energy storage road II is composed in series by backward dioded D2, capacitor C and with the in parallel or coupled in series of low-impedance voltage indicating circuit I.

7, energy storage type electronics electricity measurer according to claim 6 is characterized in that the tank circuit II is provided with diode D3, its forward place in circuit II in parallel.

8, according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described energy storage type electronics electricity measurers, it is characterized in that resistance capacitance testing circuit III is composed in series by discharge current-limiting resistance R5, light emitting diode L3, current-limiting resistance R5 one end that wherein discharges connects with the contact b of switch K, and the negative pole of light emitting diode L3 connects with the point of discharge P of the capacitor C of tank circuit II.

9, energy storage type electronics electricity measurer according to claim 1, it is characterized in that the electricity measurer profile is by main body (1), paying body (2) forms, the front end of main body (1) is provided with main probe A, main body (1) is provided with the voltage indicating circuit I in the chamber, switch K, the tank circuit II, resistance capacitance testing circuit III, wherein the neon tube of neon tube indicating circuit IV is placed in main body (1) chamber Inner Front End, light emitting diode L1, L2, L3 is placed on the preceding facial planes of main body (1), switch K is arranged on main body (1) side, pay body (2) and be provided with probe B, main body (1) is connected with a pair body (2) by solid conductor.