CN201583669U

CN201583669U - Portable small object detector

Info

Publication number: CN201583669U
Application number: CN200920298665XU
Authority: CN
Inventors: 吴昊
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-30
Filing date: 2009-12-30
Publication date: 2010-09-15
Anticipated expiration: 2019-12-30

Abstract

The utility model relates to a portable small object detector. In the technical scheme, a single-chip control circuit is used for central control, and the output end of the single-chip control circuit is connected with a video circuit and a buzzer; detection circuits are connected with the single-chip control circuit through a select switch; multiple types of detection circuits are adopted, including a density detection circuit, and an astable multi-vibrator circuit which comprises a resistor and a capacitor in series is also adopted, wherein the capacitor consists of a detection head made of metal sheet pole and an object to be detected; and the portable small object detector also comprises an AC live object detection circuit which adopts an active filter circuit with a frequency of 45-70Hz as a pass band of a filter and a metal detection circuit which adopts a high-frequency oscillating circuit with a high-frequency coil. The utility model can detect the hidden metal, the thickness and density change of the plane object, the object with an AC voltage and the like, and has the advantages of small test error, convenient carrying, simple structure and practical use.

Description

A kind of portable small articles detecting device

Technical field

The utility model relates to a kind of checkout equipment, especially a kind of portable small articles detecting device.

Background technology

The living environment that decoration quality detects for us guarantees to have very important significance, but the thing that can't directly see for many naked eyes, such as be hidden in the body of wall or plank under objects such as nail, electric wire, crosspiece, checkout equipment simply and easily not also at present.Present employed detection means is to adopt hammer to beat, and listens echo to judge, finishing is had certain destruction itself, and it is also very big to detect error simultaneously.

The utility model content

The purpose of this utility model is for a kind of portable small articles detecting device is provided, it can detect the object of thickness, variable density and the band alternating voltage of hiding metal, planar object, it is simple and practical, can be widely used in the decoration quality detection range.

Realize that the technical scheme that the utility model purpose is adopted is: a kind of portable small articles detecting device, it is by the control of single chip machine controlling circuit central authorities, and the single chip machine controlling circuit output terminal connects visual circuit and hummer; Testing circuit is connected with single chip machine controlling circuit by selector switch; Testing circuit has multiple, comprises the density detection circuit, adopts the stable multi-oscillation circuit, and this circuit comprises the resistance and the electric capacity of series connection, and detecting head and testee that electric capacity is done by a sheet metal utmost point are formed; Also comprise exchanging charged object detection circuit, adopt the active filter circuit of the frequency of 45-70Hz as the passband of wave filter; Also comprise the metal detection circuit, adopt the high-frequency oscillating circuits that comprises radio-frequency coil.

The utlity model has the detecting hidden metal, the thickness of planar object or variable density exchange functions such as charged object, the accurately result of coordinate detection, and a kind of portable small articles detecting device visual with step-by-step movement, that the buzzing prompting shows the result.

When surveying metal, adopt high-frequency oscillating circuits,, because the effect of electromagnetic induction, make that the high frequency oscillator working current is corresponding to change, can judge under radio-frequency coil according to its variation to have or not metal when radio-frequency coil during near metal.

Thickness at the detection plane object, during variable density, adopt the stable multi-oscillation circuit, because of oscillation period of this circuit being by resistance in the circuit and capacitance parameter decision, and under the constant condition of resistance value, a utmost point the detecting head of a sheet metal formation being used as electric capacity, and testee is another utmost point of electric capacity, so when the variation in thickness of testee and there is foreign matter will make the capacity that object density changes to some extent influences electric capacity, thereby cause doing oscillation period corresponding change, change thickness or density and the foreign matter variation that to judge the planar object back according to its oscillation frequency cycle.

When surveying the interchange charged object, adopt active filter circuit, the passband of the frequency of 45-70Hz as wave filter, like this when the electric field of the close 45-70Hz of detector, operational amplifier is because the input signal increase, to do corresponding alternating voltage output and change, after its output signal is changed through A/D, but whether have alternating current according to its variation judgment object.

When detector is worked, control the signal input part that high-frequency oscillating circuits, stable multi-oscillation circuit, the measured variable signal of active filter circuit are sent into it single-chip microcomputer respectively by functional select switch, carry out the work order that prelists by single-chip microcomputer, control visual circuit (forming), reach hummer from the signal output part of single-chip microcomputer according to its signal numerical values recited, point out result's (position and signal magnitude) of the object of surveying by luminotron or LCDs.

The utlity model has following beneficial effect:

1, the utility model it can detect the thickness, variable density of hiding metal, planar object and the object of band alternating voltage etc., it is little to detect error, can be convenient for carrying, not only simple in structure, but also very practical.

2, the utility model design is unique, novel, makes easily.

3, the utility model cost is low, is used more widely easily, and it can be widely used in the decoration quality detection range.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a structural representation of the present utility model.

Embodiment

As shown in Figure 1, a kind of portable small articles detecting device, it is by the control of single chip machine controlling circuit central authorities, and the single chip machine controlling circuit output terminal connects visual circuit and hummer; Testing circuit is connected with single chip machine controlling circuit by selector switch; Testing circuit has multiple, comprises the density detection circuit, adopts the stable multi-oscillation circuit, and this circuit comprises the resistance and the electric capacity of series connection, and detecting head and testee that electric capacity is done by a sheet metal utmost point are formed; Also comprise exchanging charged object detection circuit, adopt the active filter circuit of the frequency of 45-70Hz as the passband of wave filter; Also comprise the metal detection circuit, adopt the high-frequency oscillating circuits that comprises radio-frequency coil.

Ultimate principle of the present utility model and principal character advantage have more than been described.The utility model is not restricted to the described embodiments, and under the prerequisite that does not break away from the utility model spirit and scope, also has various improvement, and these improvement all will fall in claimed the utility model scope.

Claims

1. portable small articles detecting device is characterized in that: detector is by the control of single chip machine controlling circuit central authorities, and the single chip machine controlling circuit output terminal connects visual circuit and hummer; Testing circuit is connected with single chip machine controlling circuit by selector switch; Testing circuit comprises the density detection circuit, adopts the stable multi-oscillation circuit, and this circuit comprises the resistance and the electric capacity of series connection, and detecting head and testee that electric capacity is done by a sheet metal utmost point are formed.

2. a kind of portable small articles detecting device according to claim 1 is characterized in that: described testing circuit, also comprise exchanging charged object detection circuit, and adopt the active filter circuit of the frequency of 45-70Hz as the passband of wave filter.

3. a kind of portable small articles detecting device according to claim 1 is characterized in that: described testing circuit, also comprise the metal detection circuit, and adopt the high-frequency oscillating circuits that comprises radio-frequency coil.