CN103927918B

CN103927918B - Automatic pumping demonstration device is controlled using triode

Info

Publication number: CN103927918B
Application number: CN201410202410.4A
Authority: CN
Inventors: 雷建设
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-05-14
Filing date: 2014-05-14
Publication date: 2019-02-12
Anticipated expiration: 2034-05-14
Also published as: CN103927918A

Abstract

This patent is related to a kind of utilization triode control automatic pumping demonstration device.Including water tank, probe, motor and transistor control circuit, described transistor control circuit one end connects water tank, the other end connects motor, the water tank is equipped with several probes, the probe is respectively electrically connected on transistor control circuit, 4 transistors, 2 diodes, 8 resistance, 2 capacitors are equipped in the transistor control circuit.4 transistors are respectively that triode Q1, triode Q2, triode Q3 and triode Q4,2 diodes are D1 and D2.Several probes are probe a, pop one's head in b probe c, and triode Q1, triode Q2, triode Q3 and D1 cathode are sequentially connected by resistance, and D1 anode is sequentially connected with triode Q4 and motor；The output end of triode Q4 passes through the input terminal of resistance connecting triode Q2.This patent can be controlled motor by the transistor in control circuit and add water to water tank and stop adding water.

Description

Automatic pumping demonstration device is controlled using triode

Technical field

The invention patent relates to a kind of for water management demonstration device, in particular to a kind of to be drilled using triode control automatic pumping Show device.

Background technique

Transistor is most important device in electronic circuit, its most important function is that Current amplifier and switch are made With at present in teaching demonstration, transistor and relay assembly composition control circuit are very common, in the mistake demonstrated and told about It is easier to be understood by student in journey, and directly controls that motor is not common using triode, be easy to cause the fascination of student.

Summary of the invention

This patent makes up the deficiency of background technique, is related to a kind of utilization triode control automatic pumping demonstration device.Including water Case, probe, motor and transistor control circuit, described transistor control circuit one end connect water tank, and the other end connects motor, institute Water tank is stated equipped with several probes, the probe is respectively electrically connected in water supply control circuit, the transistor control circuit In be equipped with 4 transistors, 2 diodes, 8 resistance, 2 capacitors.4 transistors are respectively triode Q1, triode Q2, triode Q3 and triode Q4,2 diodes are D1 and D2.Several probes are probe a, pop one's head in b Pop one's head in c, and triode Q1, triode Q2, triode Q3 and D1 cathode are sequentially connected by resistance, and D1 anode is sequentially connected with triode Q4 and motor；The output end of triode Q4 passes through the input terminal of resistance R2R3 connecting triode Q2.

Preferably, the probe a is sequentially connected resistance R7, zener diode D1, resistance R8, triode Q4 and motor, shape At the lower limit water level of detection water tank；Probe c is sequentially connected resistance R1, triode Q1, resistance R3, triode Q2, resistance R4, three poles Pipe Q3 forms the upper limit water level of detection water tank.

Preferably, output end one end of the one end resistance R2 connecting triode connects resistance R3, the connection of the one end resistance R6 Positive pole one end connects diode D1 cathode, forms cistern water level and does not draw water higher than probe a lower than probe c motor.

Preferably, the diode D2 connects with pumping motor operating voltage reverse parallel connection, and motor is 12V electric pump.

Preferably, the power supply is that 8 section No.1 dry cells are connected in series or pressure stabilizing 12V0.5A working power.

It is further preferred that the transistor Q1 is 9012PNP type triode, Q2 is 9012PNP type triode, Q3 For 9013NPN type triode, Q4 is C3807 type NPN triode.

It is further preferred that the diode D1 is 1/2W5.1 zener diode, D2 is 1N4001 diode, resistance R1, R2, R3, R4, R5, R6, R7, R8 are 1/4W fixed carbon resister, and capacitor C1 is that tile fixed capacity C2 is electrolytic capacitor.

Automatic pumping demonstration device is controlled using triode described in the invention patent, passes through triode switch Characteristics Control water tank Water level, when the probe on water tank detect water to be added or stop plus water signal when, by the triode control of water supply control circuit Water tank processed adds water and stops adding water.

Detailed description of the invention

Electronic-circuit diagram Fig. 1 of the invention.

Specific embodiment

Embodiment 1.

It is of the present invention to control automatic pumping demonstration device using triode, water tank, zinc-plated thin gold are done using organic glass Category stick is popped one's head in, motor is 12V electric pump, and transistor Q1, Q2 select 9012PNP type triode, and Q3 selects 9013NPN type Triode, Q4 select C3807 type NPN triode.Diode D1 selects 1/2W5.1V zener diode, and D2 selects bis- pole 1N4001 Pipe, resistance R1, R2, R3, R4, R5, R6, R7, R8 select 9.1K Ω, 15 K Ω, 53 K Ω, 33 K Ω, 18 K Ω, 82 K respectively The 1/4W fixed carbon resister of Ω, 33 K Ω, 4.7 K Ω, capacitor C1 are that 0.1 μ F/100V tile fixed capacity C2 is 1 μ F25V electricity Electrolysis condenser.Demonstration device is controlled by circuit welding assembly.

12V working power is connected, when water tank probe a detection cistern water level lower limit is anhydrous, power supply 12V voltage passes through resistance R6 is in the negative pole end of diode D1 and is greater than 6.5V forward voltage, and diode D1 breakdown conducting is added to triode by resistance R8 The base stage of Q4 is greater than the voltage of 1v, and triode Q4 is closed the switch, and collector and transmitter conducting electrical power draw water.

When water tank probe a contact water level, probe b and probe a makes the tie point of resistance R7 be in low electricity by water conduction Position；However, triode Q4 collector is in low potential when motor draws water, it is in triode Q2 base stage by resistance R2, R3 Low potential, triode Q2 conducting make triode Q3 conducting connect and connect the cathode in diode D1 again in the R5 of positive pole, are equal to electric It hinders R6, R5 parallel connection and accesses diode cathode, increase the high potential of diode D1 cathode, counteract resistance R7 bring low potential It influences, then the voltage for making the base stage of diode D1 breakdown turn-on transistor Q4 be greater than 1v, triode Q4 switch continue to be closed, current collection Pole and transmitter conducting motor, which continue to be powered, to draw water.

When cistern water level rises probe c contact water level, probe a is connected by water conduction with c, and probe c is in low potential Triode Q1 base stage is set to be in low potential by resistance R1, its collector of triode Q1 switch conduction is in high potential, passes through R3 So that triode Q2 base stage is in high potential and keep it turned off (switch is closed), triode Q3 switch is forced to be closed, resistance R5, which is disconnected, to be visited The low potential of head a is added to the cathode of diode D1 by R7, is not turned on its current potential lower than 5V, triode Q4 base stage is in low electricity Position cut-off, triode Q4 switch are closed, and motor power-off stops pumping.

When water tank water is lower than probe c, diode D1 passes through water (conduction) connection probe b by the probe a of R7 connection Ground terminal makes the cathode voltage of D1 lower than 5V, and Q4 triode keeps off state, and motor continues to stop pumping.

When water tank water water level decreasing is to when leaving probe a, probe a does not pass through water and connects with probe b, and resistance R7 does not connect low Current potential, 12V power supply are in the negative pole end of diode D1 by resistance R6 and are greater than 6.5V voltage, diode D1 breakdown conducting connection The base stage that resistance R8 is added to triode Q4 is greater than the voltage of 1v, and triode Q4 is closed the switch, and motor is connected in collector and transmitter It is powered and draws water again, reciprocation cycle carries out, and has reached and has controlled the apparatus for demonstrating that draws water using triode.

The present invention is formed using the transistor of 4 different models, is all the principle using its switch control in work, And show the triode of NPN type when base stage is in high potential, collector and transmitter saturation conduction, when base stage be in it is low When current potential, collector and transmitter cut-off；For PNP type triode when base stage is in low potential, collector and transmitter are full And conducting, when base stage is in high potential, collector and transmitter cut-off, this is the working characteristics of different materials triode.

It is not generate malfunction as probe c i.e. water tank upper limit detection that C1 is set in circuit, and C2 is for a i.e. water tank lower limit of popping one's head in Detection and triode Q4 do not generate malfunction, it is ensured that the stability of circuit work.

Another water tank is accessed when use, and two water tanks are connected by motor entering water mouth water outlet with thin conduit, access 12V0.5A Working power, the pumping for water pump when water tank probe a anhydrous contact, when cistern water level is higher than probe a, water pump continues to draw water；When When cistern water level rises probe c contact, motor stops pumping.

Claims

1. triode controls automatic pumping demonstration device, including water tank, probe, motor M, triode Q1, triode Q2, triode Q3, triode Q4 and diode D1, D2, resistance R1, R2, R3, R4, R5, R6, R7, R8, capacitor C1, C2；It is characterized by: The water tank is equipped with several probes, respectively probe a, probe b, probe c, wherein probe a detects water tank lower limit water level, probe C detects water tank upper limit water level, probe b ground connection connects power cathode；

Wherein, automatic pumping process are as follows:

When a sensed water level lower limit of popping one's head in is anhydrous, 12V voltage makes D1 cathode be greater than 6.5V by R6, and positive voltage is connected in D1, and Q4 is led Logical, motor draws water；

When a that pops one's head in contacts water level, probe b and probe a makes D1 cathode be in low potential by R7；However, Q4 collector at this time In low potential, Q2 conducting is made, to which Q3 conducting makes resistance R6, R5 parallel connection access D1 cathode by R2, R3, R7 is counteracted and brings Low potential, Q4 conducting, continue to draw water；

When the c that pops one's head in contacts water, probe a makes probe c be in low potential by water conduction, and Q1 conducting ends Q2, Q3, probe a Low potential so that D1 cathode is less than 5V by R7, D1 is not turned on, and Q4 cut-off, motor power-off stops pumping；

When water tank water is lower than probe c, probe a connection probe b makes D1 cathode be less than 5V, and Q4 ends, and motor stops pumping；Directly When anhydrous to probe a, motor, which draws water, recycles automatic work.

2. triode as described in claim 1 controls automatic pumping demonstration device, it is characterised in that: the probe a is sequentially connected electricity R7, diode D1, resistance R8, triode Q4 and motor are hindered, probe c is sequentially connected resistance R1, triode Q1, resistance R3, three poles Pipe Q2, resistance R4, triode Q3, diode D1.

3. triode as described in claim 1 controls automatic pumping demonstration device, it is characterised in that: the one end resistance R6 is connecting power supply just Pole, one end connect diode D1 cathode；The output end of the one end resistance R2 connecting triode, one end connect resistance R3.

4. triode as described in claim 1 controls automatic pumping demonstration device, it is characterised in that: diode D2 and pumping motor electricity Pressure reverse parallel connection connects.

5. triode as described in claim 1 controls automatic pumping demonstration device, it is characterised in that: the power supply is dry for 8 section No.1s Battery is connected in series or pressure stabilizing 12V0.5A working power.

6. triode controls automatic pumping demonstration device as described in claims 1 or 2 or 3, it is characterised in that: the motor (3) is 12V electric pump.

7. triode as claimed in claim 4 controls automatic pumping demonstration device, it is characterised in that: the triode Q1 is 9012PNP type triode, Q2 are 9012PNP type triode, and Q3 is 9013NPN type triode, and Q4 is C3807 type NPN triode.

8. triode controls automatic pumping demonstration device as described in claim 3 or 4, it is characterised in that: described diode D1, the D2 Respectively 1/2W5.1V zener diode and 1N4001 diode, capacitor C1 are tile fixed capacity, and C2 is electrolytic capacitor.