CN205982533U - Portable three -wire set silicon materials conductivity type measuring device - Google Patents

Abstract

The utility model discloses a portable three -wire set silicon materials conductivity type measuring device is the pen container shape, by visor, middle sleeve, power supply sleeve, form from lock -switch, probe, integrated circuit board, suggestion lamp hole, USB jack, mains operated circuit board, battery case, the downthehole setting of telescopic end is supplied power from the lock -switch to sleeve one side threaded connection visor in the middle of the characterized by, its opposite side threaded connection sleeve of supplying power, middle telescopic inside is provided with the integrated circuit board of three red, yellow, green LED warning light, the beneficial effects of the utility model are that adopt USB, dry battery power supply, the low power dissipation, with stable 0 on the measuring technique 12V square wave and 6V reference voltage go to measure, measuring result adopts the LED lamp suggestion that indicates the suggestion field, the main part adopts stainless steel material, and is durable, and convenient the dismantlement is maintained and is changed the battery, it is small, convenient to carry, it is efficient.

Description

Portable three pin silicon materials conduction type measurement apparatus

Technical field

This utility model is related to silicon materials conduction type technical field of measuring equipment, more particularly to a kind of portable three pins Silicon materials conduction type measurement apparatus.

Background technology

Silicon material includes P-type silicon material, N type silicon material and the low heavily doped silicon material of resistivity, if by these silicon materials in small, broken bits It is re-used as polycrystalline silicon ingot casting or the raw material of crystal-pulling it is necessary to strictly control conduction type and the resistivity of these silicon materials. Be presently used for detecting that the method for semiconductor silicon material conduction type is a lot, but using most be temperature differential method and rectification method.But with When can sort silicon material P/N type and heavily doped method of testing is mainly rectification method, i.e. three probe method, this method is mainly will Three probe linear array are encapsulated on a column type pen container, then are connected with sorter main frame with wire, form a set of silicon material Screening installation.When three probes touch silicon material simultaneously, sorter main frame can show silicon material is P type silicon material, also It is N type silicon material, the prompting of warning can be sent for the low heavily doped silicon material of resistivity.The measurement silicon materials PN type commonly used at present sets Standby, the length of three test probes is typically greater than 0.6cm, and in test process, three probes must touch silicon simultaneously Material, the geometrical length of silicon material therefore to be measured just can must be tested in more than 0.6cm.In addition, for some geometrical lengths More than 0.6cm, but the poor silicon material of surface smoothness, three probes cannot touch silicon material surface simultaneously, lead to not to it Test.Using the concrete grammar that the method is tested it is：One holds silicon material, and another handss operate probe pen, and test is not Convenient, less efficient.

Test equipment currently, with respect to detection semiconductor silicon material conduction type and its instrument, existing related document report Road, such as the Chinese patent solaode crystalline silicon wafer conduction type measurement apparatus of Publication No. CN201413381Y, this is too Sun battery crystalline silicon wafer conduction type measurement apparatus can include detection platform, and detection platform is provided with housing, setting in housing There is telescopic hot and cold probe, between described hot and cold probe, voltmeter is connected with by wire, described voltmeter is placed in Hull outside, thermal probe connects having heaters also by thermal wire；The Chinese patent of Publication No. CN201594530U is open A kind of tweezers-shaped silicon material sorting unit of one-hand operation, this utility model is using temperature differential method principle, by traditional both hands Operation be changed to one-handed performance, concrete scheme be by traditional probe should be tweezers-shaped probe, so can one hold tweezers Type probe, handss are used for stirring silicon material, move silicon material it is also possible to be used for recording, thus improving work efficiency.This technical side Case can test the P/N type of silicon material in small, broken bits, but cannot test out the heavily doped characteristic of silicon material；Publication No. CN 202018493 U Chinese patent disclose a kind of tweezers type testing device for conduction types of silicon materials, more particularly, to a kind of irregular silicon material in small, broken bits Conduction type test device, this device includes test main frame, wire and contact, and three contacts pass through wire and test respectively Main frame connects, and can detect the PN type of the silicon material in small, broken bits that some traditional three probe methods cannot detect using this device, also simultaneously The low heavily doped silicon material of some resistivity can be chosen, this utility model mainly uses rectification method principle, by three traditional probes Two probes be changed to tweezers-shaped, this two tweezers-shaped probes are connected by adapter, in addition probe can without modification, One piece of conductor plate can be changed to, the display in test main frame can be shown that the PN type of silicon material, if silicon material is heavily doped, Chimes of doom then can be sent, it is possible to achieve silicon material less to some sizes or in irregular shape is tested, and sub-elects silicon material Conduction type or the relatively low heavily doped material of resistivity.

The technical equipment of measurement silicon materials PN type exists and is disadvantageous in that at present：

（1）Commonly used measurement silicon materials PN type existing equipment on market belongs to bench device, and circuit layout is unreasonable, Circuit board is not integrated, and electric elements placement is unreasonable, and circuit board is too big, causes such bench device volume excessive, is difficult Carry；（2）Commonly used 220V Alternating Current Power Supply, not portable, using not convenient, power consumption is larger, and there is safety problem； （3）Such bench device, using too small for numeral method relative device, needs tester first to use probe contacts during use Material, then comes back and is watched, and observes inconvenient, and complex steps, time-consuming, efficiency is very low.

It is therefore desirable to propose a kind of portable, effective silicon materials PN measurement apparatus solving the above problems.

Content of the invention

The purpose of this utility model is exactly integrated into excessive for volume and not portative silicon materials PN measuring apparatus hand-held The portable set of formula, allow user more efficient measurement silicon materials PN type, operate safer, more low consumption simultaneously.

The technical problems to be solved in the utility model is the Highgrade integration of circuit board, the measurement of silicon materials PN type, silicon materials Heavily doped type measurement, for overcoming the shortcomings of above-mentioned prior art device, this utility model provides a kind of portable three pin silicon materials Conduction type measurement apparatus.

The technical scheme in the invention for solving the technical problem is：Described portable three pin silicon materials conduction type measurements Device, by protection cap, intermediate sleeve, power supply sleeve, self-lock switch, probe, surface-mounted integrated circuit, prompting lamp hole, USB receptacle, electricity Source power supply circuits plate, battery case composition, described protection cap, intermediate sleeve and power supply cartridge exterior are shaped to cylindrical shape；Institute State the opening side setting intermediate sleeve of protection cap, described intermediate sleeve is threadeded with protection cap；Described intermediate sleeve is another Side setting power supply sleeve, described power supply sleeve is threadeded with intermediate sleeve；The end setting self-lock switch of described power supply sleeve； Described intermediate sleeve lateral surface setting indicates three prompting lamp holes of prompting field, setting integrated circuit inside described intermediate sleeve Plate, described surface-mounted integrated circuit one end connects three probes, and described probe is located inside protection cap；Described probe by a probe, No. two probes, No. three probe compositions；The described surface-mounted integrated circuit other end connects power-supplying circuit plate, described power-supplying circuit Plate is arranged on power supply sleeve inner and is connected with self-lock switch, and described power-supplying circuit plate is provided with USB receptacle and battery Box.

Described surface-mounted integrated circuit include 12V 5V power-switching circuit module, reference square wave occur module, measurement more electric Road module, phonation circuit module；Setting battery feed circuit and USB power supply circuits module on described power-supplying circuit plate；Institute State USB power supply circuits module and pass through photoelectric coupling switch U1 and field effect transistor Q1 and connect battery feed circuit, described USB powers electricity It is provided with self-lock switch in the module of road.

The battery feed circuit of described power-supplying circuit plate is by battery case and internal aneroid battery J3, photoelectric coupling switch U1, resistance R1, resistance R2, resistance R3, electric capacity C1, two wires binding post J1 composition；Described photoelectric coupling switch U1 is TLP521 Controllable photoelectric coupling device；The positive pole of described aneroid battery J3 connects the colelctor electrode of photoelectric coupling switch U1, described smooth thermocouple The emitter stage of combination switch U1 is connected with one end of resistance R2, and the other end of described resistance R2 is connected with resistance R3 one end, resistance R3 The other end is grounded；The positive pole of described photoelectric coupling switch U1 is connected with resistance R1 one end, the described resistance R1 other end and two wires Number terminal of binding post J1 connects；After the negative and positive pole of described photoelectric coupling switch U1 is connected with electric capacity C1 one end, then with described No. two terminals of two wires binding post J1 connect and are grounded；The other end of described electric capacity C1 and the positive pole of photoelectric coupling switch U1 with The contact of resistance R1 one end connects；Described electric capacity C1 and resistance R1 forms voltage stabilizing rectification RC filter circuit；

The USB power supply circuits module of described power-supplying circuit plate is by two wires binding post J2, switching push button S1, diode D1, diode D2, field effect transistor Q1 composition；Described field effect transistor Q1 is enhancement mode field effect transistor MOSFETP；The wiring of described two wires A number terminal ground of terminal J2, its No. two terminals connect No. two, No. three pins of switching push button S1 one end；Described switching push button No. four pin ground connection in the other end pin of S1, one pin connects the negative pole of diode D1 and diode D2；Described two The positive pole of pole pipe D2 connects the drain electrode of field effect transistor Q1；The source electrode of described field effect transistor Q1 connects the positive pole of aneroid battery J3；Described The grid of field effect transistor Q1 connects resistance R2 and resistance R3 junction point；The positive pole of described diode D1 is connected resistance R1 and is connect with two wires The junction point of a number terminal of line terminals J1；

Switching push button S1 on described power-supplying circuit plate is mechanically connected with self-lock switch, composition self-lock of button switch.

The power-switching circuit module of described surface-mounted integrated circuit includes 12V power-switching circuit module, 5V Power convert electricity Road module；

Described 12V power-switching circuit module include buck module chip UP1, two wires binding post P1, electric capacity CP1, Electric capacity CP2, electric capacity CP3, electric capacity C1, inductance LP1, inductance L3, inductance L4, inductance L5, resistance RP1, resistance RP2, resistance RP4, Resistance R16, Zener diode D1, Zener diode DP1；Described buck module chip UP1 is LM2577 integrated chip;Institute The COMP pin stating buck module chip UP1 is connected with resistance RP1 one end, and the resistance RP1 other end is with electric capacity CP1 one end even Connect, described electric capacity CP1 other end ground connection；The GND pin ground connection of described buck module chip UP1；Described lifting die block core The VIN pin of piece UP1 connects one end of electric capacity CP2 and one end of inductance LP1, and its VIN pin connects two wires binding post simultaneously A number terminal of P1, No. two terminals of described two wires binding post P1 connect the other end of electric capacity CP2 and are grounded；Described buck The FB pin of module chip UP1 connects resistance RP2 one end, described resistance RP2 other end ground connection；Described buck module chip The SWITCH pin of UP1 connects the positive pole of Zener diode D1 and the other end of inductance LP1, the negative pole of described Zener diode D1 Connect the positive pole of polar capacitor CP3, the minus earth of described polar capacitor CP3；Described polar capacitor CP3 is in parallel with electric capacity C1, Itself and interface are connected with resistance RP4；Described resistance RP4 is connected with resistance R16, its connect contact and buck module chip The contact of the FB pin of UP1 and resistance RP2 connects；Described resistance RP4 is connected Zener diode DP1's with the junction point of electric capacity C1 Positive pole, negative pole series inductance L3 of described Zener diode DP1, described inductance L3 series inductance L4, described inductance L4 series electrical Sense L5 one end, the described inductance L5 other end connects 12V voltage output end；

Described 5V power-switching circuit module includes voltage reduction module chip U2, electric capacity CP5, electric capacity CP6, resistance R18, inductance L6, inductance L7；Described voltage reduction module chip U2 is LM1117-5 integrated chip;The VIN pin of described voltage reduction module chip U2 is even Connect the 12V voltage output end of 12V power-switching circuit module；The VIN pin of described voltage reduction module chip U2 connects electric capacity CP5's One end, the other end ground connection of described electric capacity CP5；The GND pin ground connection of described voltage reduction module chip U2；Described voltage reduction module chip The VOUT pin of U2 connects one end of electric capacity CP6, the other end ground connection of described electric capacity CP6；Described voltage reduction module chip U2's VOUT pin connection resistance R18 one end, described resistance R18 other end series inductance L6, described inductance L6 series inductance L7, described The inductance L7 other end connects 5V voltage output end.

Described surface-mounted integrated circuit is set to dual platen；The reference square wave of described surface-mounted integrated circuit occurs module to include benchmark side There is chip U1, resistance RP6, resistance RP7, resistance RP8, resistance RP9, resistance RP10, electric capacity CP4, electric capacity C3, electric capacity C4 in ripple； It is SG3525 integrated chip that described reference square wave occurs chip U1;Described reference square wave occurs a pin of chip U1 to connect One end of resistance RP8, the other end ground connection of described resistance RP8；Described reference square wave occurs No. two pins of chip U1 to connect electricity One end of resistance RP7, the other end of described resistance RP7 connects the earth terminal of resistance RP8；There are the five of chip U1 in described reference square wave Number pin connects one end of electric capacity C3, and the other end of described electric capacity C3 connects the earth terminal of resistance RP8；Described reference square wave occurs No. six pins of chip U1 connect one end of resistance RP9, and the other end of described resistance RP9 connects the earth terminal of resistance RP8；Described There is one end that No. seven pins of chip U1 connect resistance RP10 in reference square wave, the other end of described resistance RP10 connects benchmark side There are No. five pins of chip U1 in ripple；There is the positive pole that No. eight pins of chip U1 connect electric capacity CP4 in described reference square wave, described The negative pole of electric capacity CP4 connects the earth terminal of resistance RP8；Described reference square wave occurs No. eight pins of chip U1 to connect electric capacity CP4 Positive pole, the negative pole of described electric capacity CP4 connects the earth terminal of resistance RP8；There are No. ten pins of chip U1 in described reference square wave Connect one end of electric capacity C4 and be grounded, the other end of described electric capacity C4 connects the 12V voltage output of 12V power-switching circuit module End；There are ten No. two pin ground connection of chip U1 in described reference square wave；There are ten No. three pins of chip U1 in described reference square wave Connect the 12V voltage output end of 12V power-switching circuit module；Described reference square wave occurs ten No. five pins of chip U1 to connect The 12V voltage output end of 12V power-switching circuit module；Described reference square wave occurs ten No. six pins of chip U1 to connect resistance One end of RP6, the other end of described resistance RP6 connects No. two pins that described reference square wave occurs chip U1；

The measurement comparison circuit module of described surface-mounted integrated circuit includes three line binding post P2, comparator chip JP1, compares Device chip JP2, LED 1, LED 2, LED 3, resistance R2, resistance R5, resistance R7, Resistance R8, resistance R17, electric capacity C2, electric capacity C5, inductance L1, inductance L2；Described comparator chip JP1, comparator chip JP2 type Number it is LM393 integrated chip, be arranged symmetrically in the two-sided both sides of surface-mounted integrated circuit；Described LED 1 is redness LED, described LED 2 is green LED lamp, and described LED 3 is yellow LED lamp；Described three lines connect A number pin of line terminals P2 connects the ride on Bus No. 11 pin that reference square wave occurs chip U1；No. two of described three line binding post P2 Pin connects one end of resistance R5 and No. three pins of comparator chip JP1, and the other end of described resistance R5 connects comparator core No. two pins of piece JP1；The 12V voltage that No. six pins of described comparator chip JP1 connect 12V power-switching circuit module is defeated Go out end；The negative pole of a number pin connecting luminous diode LED1 of described comparator chip JP1, described LED 1 Positive pole connects one end of resistance R7, the other end ground connection of described resistance R7；

No. two pins of described three line binding post P2 connect one end of resistance R5, and the other end of described resistance R5 connects electricity Hold one end of C2, the other end of described electric capacity C2 connects No. three pins of comparator chip JP1；The other end of described resistance R5 is even One end of connecting resistance R2, the other end of described resistance R2 connects No. three pins of comparator chip JP1；

The other end of described resistance R5 connects one end of inductance L1, the other end of described inductance L1 connect electric capacity C5 one End and No. five pins of comparator chip JP2, the other end of described electric capacity C5 connects No. three pins of comparator chip JP2；Institute No. eight pins stating comparator chip JP2 connect the 12V voltage output end of 12V power-switching circuit module；Described comparator core The negative pole of a number pin connecting luminous diode LED2 of piece JP2, the positive pole of described LED 2 connects 12V power supply and turns Change the 12V voltage output end of circuit module；No. seven pin connecting luminous diode LED3's of described comparator chip JP2 is negative Pole, the positive pole of described LED 3 connects the 12V voltage output end of 12V power-switching circuit module；Described comparator No. four pin ground connection of chip JP2；No. six pins of described comparator chip JP2 connect one end of inductance L2, described inductance L2 The other end connect three line binding post P2 No. three pins；

The phonation circuit module of described surface-mounted integrated circuit includes field effect transistor Q2, buzzer LS1 composition；Described field effect transistor Q2 is enhancement mode field effect transistor MOSFETP；Described field effect transistor Q2 source electrode and grid connect 12V power-switching circuit module 12V voltage output end；The positive pole of described field effect transistor Q2 source electrode connecting luminous diode LED1 and the contact of resistance R7；Described field Effect pipe Q2 drain electrode connects a pin of buzzer LS1, another's pin ground connection of described buzzer LS1.

Described 12V power-switching circuit module two wires binding post P1 connects the two wires terminals of power-supplying circuit plate Sub- J1.

The three line binding post P2 that described surface-mounted integrated circuit measures comparison circuit module connect three probes；Described three line wiring A number pin of terminals P 2 connects a probe of three probes；No. two pins of described three line binding post P2 connect three probes No. two probes；No. three pins of described three line binding post P2 connect No. three probes of three probes.

Described protection cap, intermediate sleeve, power supply sleeve adopt 304 stainless steel materials.

Compared with prior art, the beneficial effects of the utility model are embodied in the following aspects：

（1）Portable three pin silicon materials conduction type measurement apparatus described in the utility model, are provided with supply module, adopt 3-12V battery or 5V USB power, and consume battery when not having USB to power and power, and when inserting USB, cut-out battery is powered, and cuts Change to USB to power；It is provided with voltage stabilizing rectification RC filter circuit, input voltage all exportable stable voltage between 3-12V, come Driving means are normally run；During insertion USB, cut off battery and power by photoelectric coupling switch and field effect transistor co- controlling, I.e. USB high level drives photoelectric coupling switch output low level, controls field effect transistor to turn off battery and powers, is switched to USB and powers Pattern, then stablize 5V voltage it is ensured that testing electric energy and using safety through the realization output of voltage stabilizing rectification RC filter circuit module.

（2）The AC signal waveform that tradition three probe adopts is sine wave, and original legacy equipment carries out silicon materials PN type and surveys Amount is to go to sound out silicon materials with sine wave, and return value is shown on charactron.This utility model is in silicon materials PN type measuring principle On have essential distinction, this utility model is to remove to sound out silicon material with 0-12V square wave, the voltage of a middle plus 6V, can produce one Stablize the square wave of 0-6V, add a comparator during return value again, then result is shown to LED light, for pointing out user. The AC signal waveform that this utility model adopts is square wave, and square-wave signal is more stable than sine wave signal, using voltage-regulation chip SG3525, its pin 16 is the reference voltage source output of SG3525, and precision can reach（5.1 ± 1%）V, employs temperature and mends Repay, and be provided with current foldback circuit it is ensured that safety.

（3）Traditional three probes no reference voltage contrasts, and this utility model adds reference voltage：Square-wave signal in 12V Add a 6V reference voltage, produce -6V arrive+6V AC signal, by audion, electric capacity, resistance collective effect, shape Become a stable AC signal, export No. 1 probe and do reference voltage.

（4）Traditional three probes heavily doped type can not measure to silicon materials, and this utility model is in comparator followed by an electricity Resistance, passes through field effect transistor MOSFETP after output current, for driving buzzer, will send out when silicon materials are for heavily doped type Go out chimes of doom.

（5）Portable three pin silicon materials conduction type measurement apparatus described in the utility model, small volume, device is in cylinder Shape, easy to carry, hand-held more comfortable, operation greatly improves the efficiency that workman measures to silicon materials PN type；Using USB, dry electricity Pond powers, low in energy consumption, voltage security；Protection cap, intermediate sleeve, power supply sleeve adopt stainless steel material and with threaded, tie Real durable, detachably, it is convenient for changing battery or maintenance；During operation, apparatus main body has LED to point out, and indicates prompting field, letter Single easy to learn.

Brief description

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

Fig. 2 is circuit modular structure schematic diagram of the present utility model.

Fig. 3 is the circuit theory diagrams of power supply module of the present utility model.

Fig. 4 is the circuit theory diagrams that power-switching circuit module of the present utility model exports 12V.

Fig. 5 is the circuit theory diagrams that power-switching circuit module of the present utility model exports 5V.

Fig. 6 is that the reference square wave of surface-mounted integrated circuit of the present utility model occurs modular circuit schematic diagram.

Fig. 7 is that the measurement of surface-mounted integrated circuit of the present utility model is compared and sounding modular circuit schematic diagram.

In accompanying drawing 1：1. protection cap, 2. intermediate sleeve, sleeve of 3. powering, 4. self-lock switch, 5. probe, 6. integrated Circuit board, 7. points out lamp hole, 8. USB receptacle, 9. power-supplying circuit plate, 10. battery case.

Specific embodiment

This utility model is described in further detail to Fig. 7 in conjunction with accompanying drawing 1, so that the public preferably grasps this utility model Implementation, this utility model specific embodiment is：

As shown in figure 1, portable three pin silicon materials conduction type measurement apparatus described in the utility model, by protection cap 1st, intermediate sleeve 2, power supply sleeve 3, self-lock switch 4, probe 5, surface-mounted integrated circuit 6, prompting lamp hole 7, USB receptacle 8, power supply are powered Circuit board 9, battery case 10 form；Described protection cap 1, intermediate sleeve 2 and power supply sleeve 3 external shape are set to cylindrical shape；Institute State the opening side setting intermediate sleeve 2 of protection cap 1, described intermediate sleeve 2 is threadeded with protection cap 1；Described intermediate sleeve 2 Opposite side setting power supply sleeve 3, described power supply sleeve 3 is threadeded with intermediate sleeve 2；The end setting of described power supply sleeve 3 Self-lock switch 4；Described intermediate sleeve 2 lateral surface setting indicates three prompting lamp holes 7 of prompting field, in described intermediate sleeve 2 Portion arranges surface-mounted integrated circuit 6, and described surface-mounted integrated circuit 6 one end connects three probes 5, and described probe 5 is located inside protection cap 1； Described probe 5 is made up of a probe, No. two probes, No. three probes；Described surface-mounted integrated circuit 6 other end connects power supply and powers electricity Road plate 9, it is internal and be connected with self-lock switch 4 that described power-supplying circuit plate 9 is arranged on power supply sleeve 3, and described power supply is powered electricity USB receptacle 8 and battery case 10 are provided with road plate 9.

As shown in Figure 1 and Figure 2, portable three pin silicon materials conduction type measurement apparatus described in the utility model, described Surface-mounted integrated circuit 6 include 12V 5V power-switching circuit module, reference square wave occur module, measurement comparison circuit module, sounding Circuit module；Setting battery feed circuit and USB power supply circuits module on described power-supplying circuit plate 9；Described USB powers electricity Road module passes through photoelectric coupling switch U1 and field effect transistor Q1 connects battery feed circuit, and described USB power supply circuits module sets It is equipped with self-lock switch 4.

As shown in Figure 1 and Figure 2, portable three pin silicon materials conduction type measurement apparatus described in the utility model, described The battery feed circuit of power-supplying circuit plate 9 by battery case 10 and internal aneroid battery J3, photoelectric coupling switch U1, resistance R1, Resistance R2, resistance R3, electric capacity C1, two wires binding post J1 composition；Described photoelectric coupling switch U1 is the controllable light of TLP521 Charged couple device；The positive pole of described aneroid battery J3 connects the colelctor electrode of photoelectric coupling switch U1, described photoelectric coupling switch U1's Emitter stage is connected with one end of resistance R2, and the other end of described resistance R2 is connected with resistance R3 one end, and the resistance R3 other end is grounded； The positive pole of described photoelectric coupling switch U1 is connected with resistance R1 one end, the described resistance R1 other end with two wires binding post J1 mono- Number terminal connects；After the negative and positive pole of described photoelectric coupling switch U1 is connected with electric capacity C1 one end, then with described two wires binding post No. two terminals of J1 connect and are grounded；The other end of described electric capacity C1 and the positive pole of photoelectric coupling switch U1 and resistance R1 one end Contact connects；Described electric capacity C1 and resistance R1 forms voltage stabilizing rectification RC filter circuit；

The USB power supply circuits module of described power-supplying circuit plate 9 is by two wires binding post J2, switching push button S1, two poles Pipe D1, diode D2, field effect transistor Q1 composition；Described field effect transistor Q1 is enhancement mode field effect transistor MOSFETP；Described two wires connects A number terminal ground of line terminals J2, its No. two terminals connect No. two, No. three pins of switching push button S1 one end；Described switching is pressed No. four pin ground connection in the other end pin of button S1, one pin connects the negative pole of diode D1 and diode D2；Described The positive pole of diode D2 connects the drain electrode of field effect transistor Q1；The source electrode of described field effect transistor Q1 connects the positive pole of aneroid battery J3；Institute The grid stating field effect transistor Q1 connects resistance R2 and resistance R3 junction point；The positive pole of described diode D1 connects resistance R1 and two wires The junction point of a number terminal of binding post J1；

Switching push button S1 on described power-supplying circuit plate 9 and self-lock switch（4）It is mechanically connected, composition self-lock of button is opened Close；

During real work, when battery is powered, input 12V voltage power supply, steady through the output of voltage stabilizing rectification RC filter circuit module Fixed voltage；When USB powers, cut off battery and power by photoelectric coupling switch (TLP521) and field effect transistor co- controlling, It is switched to USB powering mode, realize output through voltage stabilizing rectification RC filter circuit module and stablize 5V voltage.Supply outside USB when accessing When electric, USB high level drives photoelectric coupling switch output low level, controls field effect transistor to turn off battery and powers.

As shown in Fig. 2, Fig. 4, Fig. 5, portable three pin silicon materials conduction type measurement dresses described in the utility model Put, described surface-mounted integrated circuit（6）Power-switching circuit module include 12V power-switching circuit module, 5V power-switching circuit Module；

Described 12V power-switching circuit module include buck module chip UP1, two wires binding post P1, electric capacity CP1, Electric capacity CP2, electric capacity CP3, electric capacity C1, inductance LP1, inductance L3, inductance L4, inductance L5, resistance RP1, resistance RP2, resistance RP4, Resistance R16, Zener diode D1, Zener diode DP1；Described buck module chip UP1 is LM2577 integrated chip;Institute The COMP pin stating buck module chip UP1 is connected with resistance RP1 one end, and the resistance RP1 other end is with electric capacity CP1 one end even Connect, described electric capacity CP1 other end ground connection；The GND pin ground connection of described buck module chip UP1；Described lifting die block core The VIN pin of piece UP1 connects one end of electric capacity CP2 and one end of inductance LP1, and its VIN pin connects two wires binding post simultaneously A number terminal of P1, No. two terminals of described two wires binding post P1 connect the other end of electric capacity CP2 and are grounded；Described buck The FB pin of module chip UP1 connects resistance RP2 one end, described resistance RP2 other end ground connection；Described buck module chip The SWITCH pin of UP1 connects the positive pole of Zener diode D1 and the other end of inductance LP1, the negative pole of described Zener diode D1 Connect the positive pole of polar capacitor CP3, the minus earth of described polar capacitor CP3；Described polar capacitor CP3 is in parallel with electric capacity C1, Itself and interface are connected with resistance RP4；Described resistance RP4 is connected with resistance R16, its connect contact and buck module chip The contact of the FB pin of UP1 and resistance RP2 connects；Described resistance RP4 is connected Zener diode DP1's with the junction point of electric capacity C1 Positive pole, negative pole series inductance L3 of described Zener diode DP1, described inductance L3 series inductance L4, described inductance L4 series electrical Sense L5 one end, the described inductance L5 other end connects 12V voltage output end；

Described 5V power-switching circuit module includes voltage reduction module chip U2, electric capacity CP5, electric capacity CP6, resistance R18, inductance L6, inductance L7；Described voltage reduction module chip U2 is LM1117-5 integrated chip;The VIN pin of described voltage reduction module chip U2 is even Connect the 12V voltage output end of 12V power-switching circuit module；The VIN pin of described voltage reduction module chip U2 connects electric capacity CP5's One end, the other end ground connection of described electric capacity CP5；The GND pin ground connection of described voltage reduction module chip U2；Described voltage reduction module chip The VOUT pin of U2 connects one end of electric capacity CP6, the other end ground connection of described electric capacity CP6；Described voltage reduction module chip U2's VOUT pin connection resistance R18 one end, described resistance R18 other end series inductance L6, described inductance L6 series inductance L7, described The inductance L7 other end connects 5V voltage output end；

During real work, when supply module power input, lifting die block LM2577 chip on mainboard, LM1117-5 pair The power supply of input carries out buck process, exports stable 12V power supply.

As shown in Fig. 2, Fig. 6, portable three pin silicon materials conduction type measurement apparatus described in the utility model, described Surface-mounted integrated circuit 6 is dual platen；The reference square wave of described surface-mounted integrated circuit 6 occur module include reference square wave occur chip U1, Resistance RP6, resistance RP7, resistance RP8, resistance RP9, resistance RP10, electric capacity CP4, electric capacity C3, electric capacity C4；Described reference square wave is sent out Raw chip U1 is SG3525 integrated chip；There is one end that a pin of chip U1 connects resistance RP8 in described reference square wave, The other end ground connection of described resistance RP8；There is one end that No. two pins of chip U1 connect resistance RP7, institute in described reference square wave The other end stating resistance RP7 connects the earth terminal of resistance RP8；Described reference square wave occurs No. five pins of chip U1 to connect electric capacity One end of C3, the other end of described electric capacity C3 connects the earth terminal of resistance RP8；Described reference square wave occurs No. six of chip U1 to draw Foot connects one end of resistance RP9, and the other end of described resistance RP9 connects the earth terminal of resistance RP8；There is core in described reference square wave No. seven pins of piece U1 connect one end of resistance RP10, and the other end of described resistance RP10 connects reference square wave and occurs chip U1's No. five pins；There is the positive pole that No. eight pins of chip U1 connect electric capacity CP4, the negative pole of described electric capacity CP4 in described reference square wave Connect the earth terminal of resistance RP8；There is the positive pole that No. eight pins of chip U1 connect electric capacity CP4, described electricity in described reference square wave The negative pole holding CP4 connects the earth terminal of resistance RP8；Described reference square wave occurs No. ten pins of chip U1 to connect the one of electric capacity C4 Hold and be grounded, the other end of described electric capacity C4 connects the 12V voltage output end of 12V power-switching circuit module；Described benchmark side There are ten No. two pin ground connection of chip U1 in ripple；Described reference square wave occurs ten No. three pins connection 12V power supplys of chip U1 to turn Change the 12V voltage output end of circuit module；Described reference square wave occurs ten No. five pins of chip U1 to connect 12V Power convert electricity The 12V voltage output end of road module；There is one end that ten No. six pins of chip U1 connect resistance RP6, institute in described reference square wave The other end stating resistance RP6 connects No. two pins that described reference square wave occurs chip U1；

During real work, the voltage of input power modular converter is processed to SG3525 chip, in SG3525 chip The stable square-wave signal of 11st foot output, exports three probe the first probes as reference square wave.

As shown in Fig. 2, Fig. 7, portable three pin silicon materials conduction type measurement apparatus described in the utility model, described The measurement comparison circuit module of surface-mounted integrated circuit 6 include three line binding post P2, comparator chip JP1, comparator chip JP2, LED 1, LED 2, LED 3, resistance R2, resistance R5, resistance R7, resistance R8, resistance R17, electric capacity C2, electric capacity C5, inductance L1, inductance L2；Described comparator chip JP1, comparator chip JP2 model are LM393 Integrated chip, is arranged symmetrically in the two-sided both sides of surface-mounted integrated circuit 6；Described LED 1 is red LED lamp, described Optical diode LED2 is green LED lamp, and described LED 3 is yellow LED lamp；The one of described three line binding post P2 Number pin connects the ride on Bus No. 11 pin that reference square wave occurs chip U1；No. two pins of described three line binding post P2 connect resistance One end of R5 and No. three pins of comparator chip JP1, No. two of the other end connection comparator chip JP1 of described resistance R5 are drawn Foot；No. six pins of described comparator chip JP1 connect the 12V voltage output end of 12V power-switching circuit module；Described comparison The negative pole of a number pin connecting luminous diode LED1 of device chip JP1, the positive pole of described LED 1 connects resistance One end of R7, the other end ground connection of described resistance R7；

No. two pins of described three line binding post P2 connect one end of resistance R5, and the other end of described resistance R5 connects electricity Hold one end of C2, the other end of described electric capacity C2 connects No. three pins of comparator chip JP1；The other end of described resistance R5 is even One end of connecting resistance R2, the other end of described resistance R2 connects No. three pins of comparator chip JP1；

The other end of described resistance R5 connects one end of inductance L1, the other end of described inductance L1 connect electric capacity C5 one End and No. five pins of comparator chip JP2, the other end of described electric capacity C5 connects No. three pins of comparator chip JP2；Institute No. eight pins stating comparator chip JP2 connect the 12V voltage output end of 12V power-switching circuit module；Described comparator core The negative pole of a number pin connecting luminous diode LED2 of piece JP2, the positive pole of described LED 2 connects 12V power supply and turns Change the 12V voltage output end of circuit module；No. seven pin connecting luminous diode LED3's of described comparator chip JP2 is negative Pole, the positive pole of described LED 3 connects the 12V voltage output end of 12V power-switching circuit module；Described comparator No. four pin ground connection of chip JP2；No. six pins of described comparator chip JP2 connect one end of inductance L2, described inductance L2 The other end connect three line binding post P2 No. three pins；

The phonation circuit module of described surface-mounted integrated circuit 6 includes field effect transistor Q2, buzzer LS1 composition；Described field effect Pipe Q2 is enhancement mode field effect transistor MOSFETP；Described field effect transistor Q2 source electrode and grid connect 12V power-switching circuit module 12V voltage output end；The positive pole of described field effect transistor Q2 source electrode connecting luminous diode LED1 and the contact of resistance R7；Described field Effect pipe Q2 drain electrode connects a pin of buzzer LS1, another's pin ground connection of described buzzer LS1；

During real work, the 12V voltage of input power modular converter output, through R5 resistance and a slide rheostat Adjust, produce the measurement reference voltage of 6V, export No. two probes of three probes.Draw 6V telecommunications from No. two probes of three probes Number, and design peripheral comparison circuit, take out a signal before and after current-limiting resistance R5 with No. three probe measurement voltages and be connected to a road LM393 chip is compared, and output termination red LED 1 lamp to control red light emitting diodes with the grid of field effect transistor Q2 LED1 and the switch of field effect transistor, realize heavily doped warning.No. two of three probes, No. three probe two-way cause in measurement comparison module Inductance end, signal is carried out positive-negative connected with LM393 two-way comparator respectively, just connecing signal output access green emitting two pole Pipe LED2 cathode portion, reversal connection signal output terminates yellow light-emitting diode LED3 negative pole, realizes the measurement of p-type and N-type respectively Warning light lights simultaneously.

As shown in Figure 3, Figure 4, portable three pin silicon materials conduction type measurement apparatus described in the utility model, described 12V power-switching circuit module two wires binding post P1 connect power-supplying circuit plate 9 two wires binding post J1.

As shown in Figure 1, Figure 7 shows, portable three pin silicon materials conduction type measurement apparatus described in the utility model, described The three line binding post P2 that surface-mounted integrated circuit 6 measures comparison circuit module connect three probes 5；The one of described three line binding post P2 Number pin connects a probe of three probes 5；No. two pins of described three line binding post P2 connect No. two spies of three probes 5 Pin；No. three pins of described three line binding post P2 connect No. three probes of three probes 5.

Tester's hand-held portable three pin silicon materials conduction type measurement dresses described in the utility model are needed during use Put and use probe contacts material, according to intermediate sleeve setting three red, yellow, and green color LED warning lights and prompting field, then Judge silicon materials p-type, heavily doped type, N-type.

The beneficial effects of the utility model are embodied in the following aspects：

（1）Portable three pin silicon materials conduction type measurement apparatus described in the utility model, are supplied with using household electric 220V Electricity and compared using very inconvenient tradition three probe, powered using 3-12V battery or 5V USB, disappear when not having USB to power Power consumption pond powers, and when inserting USB, cut-out battery is powered, and is switched to USB and powers；Voltage stabilizing rectification RC filter circuit, input voltage Between 3-12V, all exportable stable voltage, carrys out driving means and normally runs；During insertion USB, by photoelectric coupling switch and Field effect transistor co- controlling is powered cutting off battery, and that is, USB high level drives photoelectric coupling switch output low level, and controlling filed is imitated Pipe shutoff battery should power, be switched to USB powering mode, then realize output through voltage stabilizing rectification RC filter circuit module and stablize 5V Voltage.

（2）The AC signal waveform that tradition three probe adopts is sine wave, and original legacy equipment carries out silicon materials PN type and surveys Amount is to go to sound out silicon materials with sine wave, and return value is shown on charactron.Portable three pin silicon materials described in the utility model Conduction type measurement apparatus have essential distinction in silicon materials PN type measuring principle, and this utility model is to go to try with 0-12V square wave Visit silicon material, the middle voltage adding a 6V, a square wave stablizing 0-6V can be produced, add a comparator during return value again, so Afterwards result is shown to LED light to be used for pointing out user.The AC signal waveform that this utility model adopts is square wave, and square wave is believed Number more stable than sine wave signal, the technology used is using voltage-regulation chip SG3525, and its pin 16 is the benchmark of SG3525 Voltage source exports, and precision can reach（5.1 ± 1%）V, employs temperature-compensating, and is provided with current foldback circuit.

（3）Traditional three probes no reference voltage contrasts, portable three pin silicon materials conduction types described in the utility model Measurement apparatus add reference voltage：Add the reference voltage of a 6V in the square-wave signal of 12V, produce the exchange letter that -6V arrives+6V Number, by audion, electric capacity, resistance collective effect, formed a stable AC signal, export No. 1 probe and do benchmark Voltage.

（4）Traditional three probes heavily doped type can not measure to silicon materials, and portable three pin silicon materials described in the utility model are led Electric categorical measures device is on the basis of PN type measurement, in comparator followed by a resistance, passes through after output current One field effect transistor MOSFETP, for driving buzzer, will send chimes of doom when silicon materials are for heavily doped type.

（5）Portable three pin silicon materials conduction type measurement apparatus described in the utility model, small volume, device is in pen container Shape, easy to carry, hand-held more comfortable, operation greatly improves the efficiency that workman measures to silicon materials PN type；Using USB, dry electricity Pond powers, low in energy consumption, voltage security；Protection cap, intermediate sleeve, power supply sleeve adopt stainless steel material and with threaded, tie Real durable, detachably, it is convenient for changing battery or maintenance；During operation, apparatus main body has LED to point out, and indicates prompting field, letter Single easy to learn.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all this Within the spirit of utility model and principle, any modification, equivalent substitution and improvement made etc., should be included in this utility model Protection domain within.

Claims (9)

1. a kind of portable three pin silicon materials conduction type measurement apparatus, including protection cap（1）, intermediate sleeve（2）, power supply sleeve （3）, self-lock switch（4）, probe（5）, surface-mounted integrated circuit（6）, prompting lamp hole（7）, USB receptacle（8）, power-supplying circuit plate （9）, battery case（10）It is characterised in that described protection cap（1）, intermediate sleeve（2）With power supply sleeve（3）External shape be all provided with It is set to cylindrical shape；Described protection cap（1）Opening side setting intermediate sleeve（2）, described intermediate sleeve（2）With protection cap（1） Threaded；Described intermediate sleeve（2）Other end setting power supply sleeve（3）, described power supply sleeve（3）With intermediate sleeve（2）Spiral shell Stricture of vagina connects；Described power supply sleeve（3）End be provided with self-lock switch（4）；Described intermediate sleeve（2）Lateral surface is provided with and indicates Three prompting lamp holes of prompting field（7）, described intermediate sleeve（2）Internal setting surface-mounted integrated circuit（6）, described surface-mounted integrated circuit （6）One end connects three probes（5）, described probe（5）It is located at protection cap（1）Internal；Described probe（5）By a probe, two Number probe, No. three probes compositions；Described surface-mounted integrated circuit（6）The other end connects power-supplying circuit plate（9）, described power supply powers Circuit board（9）It is arranged on power supply sleeve（3）Inside and self-lock switch（4）Connect, described power-supplying circuit plate（9）Upper setting There is USB receptacle（8）And battery case（10）.

2. portable three pin silicon materials conduction type measurement apparatus according to claim 1 are it is characterised in that described integrated Circuit board（6）There is module, measurement comparison circuit module, sounding electricity including 12V/5V power-switching circuit module, reference square wave Road module.

3. portable three pin silicon materials conduction type measurement apparatus according to claim 1 are it is characterised in that described power supply Power supply circuits plate（9）On be provided with battery feed circuit and USB power supply circuits module；Described USB power supply circuits module passes through light Thermocouple combination switch U1 and field effect transistor Q1 connect battery feed circuit, and described USB power supply circuits module is provided with self-lock switch （4）.

4. portable three pin silicon materials conduction type measurement apparatus according to claim 3 are it is characterised in that described power supply Power supply circuits plate（9）Battery feed circuit by battery case（10）And internal aneroid battery J3, photoelectric coupling switch U1, resistance R1, Resistance R2, resistance R3, electric capacity C1, two wires binding post J1 composition；Described photoelectric coupling switch U1 is controllable photoelectric coupling Device；The positive pole of described aneroid battery J3 connects the colelctor electrode of photoelectric coupling switch U1, the emitter stage of described photoelectric coupling switch U1 It is connected with one end of resistance R2, the other end of described resistance R2 is connected with resistance R3 one end, the resistance R3 other end is grounded；Described light The positive pole of thermocouple combination switch U1 is connected with resistance R1 one end, the described resistance R1 other end with number terminal of two wires binding post J1 Connect；After the negative and positive pole of described photoelectric coupling switch U1 is connected with electric capacity C1 one end, then two with described two wires binding post J1 Number terminal connects and is grounded；The other end of described electric capacity C1 is connected with the contact of the positive pole of photoelectric coupling switch U1 and resistance R1 one end Connect；Described electric capacity C1 and resistance R1 forms voltage stabilizing rectification RC filter circuit；

Described power-supplying circuit plate（9）USB power supply circuits module by two wires binding post J2, switching push button S1, diode D1, diode D2, field effect transistor Q1 composition；Described field effect transistor Q1 is enhancement mode field effect transistor；Described two wires binding post J2 A terminal ground, its No. two terminals connect No. two, No. three pins of switching push button S1 one end；Described switching push button S1's is another No. four pin ground connection in the pin of one end, one pin connects the negative pole of diode D1 and diode D2；Described diode D2 Positive pole connect field effect transistor Q1 drain electrode；The source electrode of described field effect transistor Q1 connects the positive pole of aneroid battery J3；Described field effect The grid of pipe Q1 connects resistance R2 and resistance R3 junction point；The positive pole of described diode D1 connects resistance R1 and two wires binding post The junction point of a number terminal of J1；

Described power-supplying circuit plate（9）On switching push button S1 and self-lock switch（4）It is mechanically connected, composition button switching Switch.

5. the portable three pin silicon materials conduction type measurement apparatus according to any one of Claims 1 to 4 it is characterised in that Described surface-mounted integrated circuit（6）Power-switching circuit module include 12V power-switching circuit module, 5V power-switching circuit mould Block；

Described 12V power-switching circuit module includes buck module chip UP1, two wires binding post P1, electric capacity CP1, electric capacity CP2, electric capacity CP3, electric capacity C1, inductance LP1, inductance L3, inductance L4, inductance L5, resistance RP1, resistance RP2, resistance RP4, resistance R16, Zener diode D1, Zener diode DP1；Described buck module chip UP1 is LM2577 integrated chip；Described liter The COMP pin of voltage reduction module chip UP1 is connected with resistance RP1 one end, and the resistance RP1 other end is connected with electric capacity CP1 one end, institute State electric capacity CP1 other end ground connection；The GND pin ground connection of described buck module chip UP1；Described buck module chip UP1 VIN pin connect one end of electric capacity CP2 and one end of inductance LP1, its VIN pin connects the one of two wires binding post P1 simultaneously Number terminal, the other end that No. two terminals of described two wires binding post P1 connect electric capacity CP2 is simultaneously grounded；Described lifting die block core The FB pin of piece UP1 connects resistance RP2 one end, described resistance RP2 other end ground connection；Described buck module chip UP1's SWITCH pin connects the positive pole of Zener diode D1 and the other end of inductance LP1, and the negative pole of described Zener diode D1 connects The positive pole of polar capacitor CP3, the minus earth of described polar capacitor CP3；Described polar capacitor CP3 is in parallel with electric capacity C1, and it is simultaneously Interface is connected with resistance RP4；Described resistance RP4 is connected with resistance R16, and its series connection contact is with buck module chip UP1's The contact of FB pin and resistance RP2 connects；Described resistance RP4 is connected the positive pole of Zener diode DP1 with the junction point of electric capacity C1, Negative pole series inductance L3 of described Zener diode DP1, described inductance L3 series inductance L4, described inductance L4 series inductance L5 mono- End, the described inductance L5 other end connects 12V voltage output end；

Described 5V power-switching circuit module include voltage reduction module chip U2, electric capacity CP5, electric capacity CP6, resistance R18, inductance L6, Inductance L7；Described voltage reduction module chip U2 is LM1117-5 integrated chip；The VIN pin of described voltage reduction module chip U2 connects The 12V voltage output end of 12V power-switching circuit module；The VIN pin of described voltage reduction module chip U2 connects the one of electric capacity CP5 End, the other end ground connection of described electric capacity CP5；The GND pin ground connection of described voltage reduction module chip U2；Described voltage reduction module chip U2 VOUT pin connect electric capacity CP6 one end, described electric capacity CP6 the other end ground connection；The VOUT of described voltage reduction module chip U2 Pin connects resistance R18 one end, described resistance R18 other end series inductance L6, described inductance L6 series inductance L7, described inductance The L7 other end connects 5V voltage output end.

6. portable three pin silicon materials conduction type measurement apparatus according to claim 5 are it is characterised in that described integrated Circuit board（6）It is set to dual platen；Described surface-mounted integrated circuit（6）Reference square wave occur module include reference square wave occur chip U1, resistance RP6, resistance RP7, resistance RP8, resistance RP9, resistance RP10, electric capacity CP4, electric capacity C3, electric capacity C4；Described benchmark side It is SG3525 integrated chip that ripple occurs chip U1；Described reference square wave occurs a pin of chip U1 to connect the one of resistance RP8 End, the other end ground connection of described resistance RP8；There is one end that No. two pins of chip U1 connect resistance RP7 in described reference square wave, The other end of described resistance RP7 connects the earth terminal of resistance RP8；Described reference square wave occurs No. five pins of chip U1 to connect electricity Hold one end of C3, the other end of described electric capacity C3 connects the earth terminal of resistance RP8；There are No. six of chip U1 in described reference square wave Pin connects one end of resistance RP9, and the other end of described resistance RP9 connects the earth terminal of resistance RP8；Described reference square wave occurs No. seven pins of chip U1 connect one end of resistance RP10, and the other end of described resistance RP10 connects reference square wave and chip U1 occurs No. five pins；There is the positive pole that No. eight pins of chip U1 connect electric capacity CP4 in described reference square wave, described electric capacity CP4's is negative Pole connects the earth terminal of resistance RP8；There is the positive pole that No. eight pins of chip U1 connect electric capacity CP4 in described reference square wave, described The negative pole of electric capacity CP4 connects the earth terminal of resistance RP8；Described reference square wave occurs No. ten pins of chip U1 to connect electric capacity C4's One end is simultaneously grounded, and the other end of described electric capacity C4 connects the 12V voltage output end of 12V power-switching circuit module；Described benchmark There are ten No. two pin ground connection of chip U1 in square wave；Described reference square wave occurs ten No. three pins of chip U1 to connect 12V power supply The 12V voltage output end of conversion circuit module；Described reference square wave occurs ten No. five pins of chip U1 to connect 12V Power convert The 12V voltage output end of circuit module；There is one end that ten No. six pins of chip U1 connect resistance RP6 in described reference square wave, The other end of described resistance RP6 connects No. two pins that described reference square wave occurs chip U1；

Described surface-mounted integrated circuit（6）Measurement comparison circuit module include three line binding post P2, comparator chip JP1, compare Device chip JP2, LED 1, LED 2, LED 3, resistance R2, resistance R5, resistance R7, Resistance R8, resistance R17, electric capacity C2, electric capacity C5, inductance L1, inductance L2；Described comparator chip JP1, comparator chip JP2 type Number it is LM393 integrated chip, in surface-mounted integrated circuit（6）Two-sided both sides be arranged symmetrically；Described LED 1 is red Color LED, described LED 2 is green LED lamp, and described LED 3 is yellow LED lamp；Described three lines A number pin of binding post P2 connects the ride on Bus No. 11 pin that reference square wave occurs chip U1；The two of described three line binding post P2 Number pin connects one end of resistance R5 and No. three pins of comparator chip JP1, and the other end of described resistance R5 connects comparator No. two pins of chip JP1；No. six pins of described comparator chip JP1 connect the 12V voltage of 12V power-switching circuit module Outfan；The negative pole of a number pin connecting luminous diode LED1 of described comparator chip JP1, described LED 1 Positive pole connect resistance R7 one end, described resistance R7 the other end ground connection；

No. two pins of described three line binding post P2 connect one end of resistance R5, and the other end of described resistance R5 connects electric capacity C2 One end, the other end of described electric capacity C2 connects No. three pins of comparator chip JP1；The other end of described resistance R5 connects electricity One end of resistance R2, the other end of described resistance R2 connects No. three pins of comparator chip JP1；

The other end of described resistance R5 connects one end of inductance L1, the other end of described inductance L1 connect electric capacity C5 one end and No. five pins of comparator chip JP2, the other end of described electric capacity C5 connects No. three pins of comparator chip JP2；Described ratio No. eight pins compared with device chip JP2 connect the 12V voltage output end of 12V power-switching circuit module；Described comparator chip JP2 A pin connecting luminous diode LED2 negative pole, the positive pole of described LED 2 connects 12V Power convert electricity The 12V voltage output end of road module；The negative pole of No. seven pin connecting luminous diode LED3 of described comparator chip JP2, institute The positive pole stating LED 3 connects the 12V voltage output end of 12V power-switching circuit module；Described comparator chip No. four pin ground connection of JP2；No. six pins of described comparator chip JP2 connect one end of inductance L2, and described inductance L2's is another One end connects No. three pins of three line binding post P2；

Described surface-mounted integrated circuit（6）Phonation circuit module include field effect transistor Q2, buzzer LS1 composition；Described field effect transistor Q2 is enhancement mode field effect transistor；The 12V voltage of described field effect transistor Q2 source electrode and grid connection 12V power-switching circuit module is defeated Go out end；The positive pole of described field effect transistor Q2 source electrode connecting luminous diode LED1 and the contact of resistance R7；Described field effect transistor Q2 Drain electrode connects a pin of buzzer LS1, another's pin ground connection of described buzzer LS1.

7. portable three pin silicon materials conduction type measurement apparatus according to claim 6 are it is characterised in that described 12V Power-switching circuit module two wires binding post P1 connects power-supplying circuit plate（9）Two wires binding post J1.

8. portable three pin silicon materials conduction type measurement apparatus according to claim 6 are it is characterised in that described integrated Circuit board（6）Three line binding post P2 of measurement comparison circuit module connect three probes（5）；The one of described three line binding post P2 Number pin connects three probes（5）A probe；No. two pins of described three line binding post P2 connect three probes（5）No. two Probe；No. three pins of described three line binding post P2 connect three probes（5）No. three probes.

9. portable three pin silicon materials conduction type measurement apparatus according to claim 1 are it is characterised in that described guarantor Protecting cover（1）, intermediate sleeve（2）, power supply sleeve（3）Using 304 stainless steel materials.