CN2041427U

CN2041427U - Circuit detector for automobile

Info

Publication number: CN2041427U
Application number: CN 88204342
Authority: CN
Inventors: 张喜军; 王福安
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-04-13
Filing date: 1988-04-13
Publication date: 1989-07-19

Abstract

The utility model discloses a circuit detector for an automobile, belonging to the detection of electric variates. The detector can be utilized to enable drivers and maintainers to quickly judge the working conditions of the lines of electric apparatuses, measure electric voltage, and can also measure the high and low of the electric voltage. The detector uses an LED to display the electric voltage of circuits, and uses three colors to respectively denote the different scopes of the electric voltage. The detector comprises a test probe, a casing, a rear lid, conducting wires, a fish clip, etc. the utility model has the advantages of visual display, minimal power expenditure, dexterity, and convenience.

Description

Circuit detector for automobile

The motor circuit detecting device belongs to electric variable measurement.

Motor vehicle maintenance personal or driver's check circuit in the past, power supply short circuit method trial voltage commonly used have or not available instrument with good conditionsi.With power supply short-circuit method deadly defect is possible damage storage battery, also can not cause battery voltage consumption excessive even do not damage storage battery

At present, the battery voltage of China's motor vehicles is divided three classes: the battery voltage of imported car or diesel vehicle is 24V; Home-produced fuel automobile battery voltage is 12V; The motorcycle battery voltage is 6V.

The purpose of this utility model provides a kind of motor circuit detecting device, and it can not only check whether electric appliance circuits breaks down, the having or not of measuring voltage, but also the height of energy measurement voltage.

The formation of the utility model motor circuit detecting device is made up of parts such as test probe 1, housing 2, bonnet 3, lead 4, fish folders 5.Housing and bonnet are generally made of plastic.See accompanying drawing 1.

Circuit theory diagrams are seen accompanying drawing 3: circuit-under-test voltage is through D ₁After the voltage stabilizing,, supply with light emitting diode D by adjustable resistance W current limliting ₆When measured resistance surpasses D ₆During starting potential, through D ₂, D ₃Light emitting diode D is lighted in conducting ₇When tested voltage surpasses D ₇During starting potential, through D ₄, D ₅Light emitting diode D is lighted in conducting ₈R ₁, R ₂, R ₃Be respectively D ₆, D ₇, D ₈Current-limiting resistance.

The utility model has the advantages that to check whether electric appliance circuits breaks down, the having or not of measuring voltage, but also the height of energy measurement voltage is represented three kinds of voltage ranges respectively with three kinds of colors, and intuitive display, power consumption is minimum, and is dexterous convenient.

The utility model description of drawings:

Fig. 1 motor circuit detecting device outside drawing;

1, test probe, 2, housing, 3, bonnet, 4, lead, 5 fishes folder.

Fig. 2 cut-away view;

Fig. 3 circuit theory diagrams;

D ₁Stabilivolt, D ₂～D ₅Silicon diode, D ₆～D ₈Light emitting diode, R ₁～R ₃Current-limiting resistance, the W adjustable resistance.

Fig. 4 circuit board drawing.

This utility model most preferred embodiment: make profile with plastics by Fig. 1, according to circuit theory Fig. 3, with circuit board drawing 4 welding, wherein D ₁Be 3DG202eb knot, D ₂～D ₅Be 2CK or 2CP, D ₆, D ₇, D ₈Be respectively greenish-yellow red three kinds of light emitting diodes, R ₁Be 390 Ω, R ₂220 Ω, R ₃150 Ω carbon resisters, W are the 1K adjustable resistance.

With the 12V detecting device is example, and when green is managed when bright, expression voltage is between 8.5～10; Yellowish green bright voltage of pipe while is between 10～11.5V; Yellow, green, red bright voltage of while is between 11.5～13V, and when voltage was lower than 8.5V or opens circuit, three arms did not all work, and the user can find fault rapidly like this.

The utility model circuit detector for automobile provides a kind of simple, practical testing tool for driver and maintenance personal, and the combined-voltage that also can be used in this detector voltage scope is measured.

Claims

1, a kind of motor circuit detecting device is made up of plastic casing and circuit two parts, it is characterized in that shell is made up of parts such as test probe, housing, bonnet, lead, fish folders, and circuit is by stabilivolt D ₁, silicon diode D ₂～D ₅, light emitting diode D ₆～D ₈, current-limiting resistance R ₁～R ₃Form with adjustable resistance W, circuit-under-test voltage is through D ₁After the voltage stabilizing,, supply with light emitting diode D by adjustable resistance W current limliting ₆, through D ₂, D ₃Light emitting diode D is lighted in conducting ₇, when tested voltage surpasses D ₇During starting potential, through D ₄, D ₅Light emitting diode D is lighted in conducting ₈