CN2572637Y - Power supply for laboratory - Google Patents
Power supply for laboratory Download PDFInfo
- Publication number
- CN2572637Y CN2572637Y CN 02277467 CN02277467U CN2572637Y CN 2572637 Y CN2572637 Y CN 2572637Y CN 02277467 CN02277467 CN 02277467 CN 02277467 U CN02277467 U CN 02277467U CN 2572637 Y CN2572637 Y CN 2572637Y
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- CN
- China
- Prior art keywords
- power supply
- laboratory
- circuit
- voltage
- student
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Control Of Voltage And Current In General (AREA)
Abstract
The utility model relates to a power supply for a laboratory, which comprises a main control power supply for a laboratory and a power supply for students, wherein, the main control power supply for a laboratory is composed of a main control panel for a laboratory and a main control power box for a laboratory. The utility model is characterized in that single chip computers (1) (2) are arranged in an overload protection circuit of the main control power box. A single chip computer (3) is arranged in a parameter detection and voltage regulation circuit of the main control panel, wherein, a main control module for students, a main control module for teachers and a main control module operated by teachers are respectively used as the main programs of the single chip computer (1), the single chip computer (2) and the single chip computer (3). The three main programs are communicated by using serial ports; the gear shifting switchover, the detection and the display of AC-DC voltage for students and AC-DC voltage for teachers, the control of an electromagnetic valve, the student grouping control, the overload protection and the overcurrent protection are all automatically processed by the single chip computers, and the operation is stable and reliable. The utility model is suitable for chemical teaching experimental equipment, physical teaching experimental equipment, biological teaching experimental equipment of a junior high school, a technical secondary school, a profession high school, a general high school, etc.
Description
Affiliated technical field
The utility model relates to the equipment of the usefulness of imparting knowledge to students, promptly a kind of breadboard supply unit.
Background technology
At present; the structure of using more general laboratory complete set of equipments comprises that the teacher demonstrates master station and student experimenting platform; electric circuit mainly is made up of power transformer, rectification circuit, voltage stabilizing circuit, regulating circuit, protective circuit etc.; its output DC voltage-stabilizing is adjustable continuously; alternating voltage is selected by step switch, and is multiple functional, easy to operate, conventional efficient is high.But the protective circuit of existing product adopts fuse circuit to constitute, in case during the load overload flow, because the intensification fusing process of fuse needs a period of time, cause the damage of main circuit components and parts easily, its protective value is poor, work is unreliable.Alternating voltage is selected by step switch, inconvenient operation, and switch is easy to wear.
Summary of the invention
The purpose of this utility model is the problem that exists at prior art, and a kind of laboratory power supply device of, reliable operation good, easy to operate to overload, overcurrent protection performance is provided.
The technical scheme that realizes the utility model purpose comprises laboratory master control power supply and student's power supply, master control power supply in laboratory is made up of laboratory master control panel and laboratory master control power supply box, the laboratory master control panel is by rectification circuit, filter circuit, voltage stabilizing circuit, regulating circuit, the electrical parameters detection circuit, button inputting circuits, charactron and diode display circuit are formed, laboratory master control power supply box is by earth leakage protective device, transformer, rectification circuit, filter circuit, voltage stabilizing circuit, the electrical parameters detection circuit, the relay output circuit is formed, student's power supply is by rectification circuit, filter circuit, voltage stabilizing circuit, overload protecting circuit is formed, it is characterized in that: in master control power supply box overload protecting circuit, single-chip microcomputer 1 and single-chip microcomputer 2 are arranged, master control panel parameter detecting and voltage stabilizing are adjusted in the circuit, single-chip microcomputer 3 is arranged, student's main control module, teacher's main control module, the operation of teacher main control module is respectively single-chip microcomputer 1, single-chip microcomputer 2, the main program of single-chip microcomputer 3, pass through serial communication, student's main control module and student's voltage transitions Executive Module between these three main programs, student's switching executing module of dividing into groups, the contact of student's total current low-voltage, high-current AC-input voltage detection module; Teacher's main control module and teacher's voltage transitions Executive Module, high direct voltage handover module, low-voltage, high-current control module are got in touch; Operation of teacher main control module and teacher's electric current and voltage detection module, teacher's voltage stabilizing adjusting module, get in touch by key processing module, driver module.
The electrical parameters detection circuit of laboratory master control panel and laboratory master control power supply box constitutes by induction coil, integrated transporting discharging, electronic switch, modulus conversion chip.
Laboratory master control panel regulating circuit is adjusted circuit by analog-digital chip, integrated transporting discharging, triode voltage stabilizing and is constituted.
Student's over current protection circuit is made of detection resistance R 7, overload protective relay JR1, triode Q1, Q2, resistance R 1-R6, electric capacity E1, E2, diode D2, D3, relay indicating light L1, alarm lamp L2, external reset button Z8.
Laboratory master control power supply box transformer is divided into teacher's transformer, student's transformer, low-voltage, high-current transformer, high direct voltage transformer, laboratory master control power supply with five in transformer transformer independently, and teacher's transformer and student's transformer all have 12V, 14V, 16V, 18V, 20V, 22V, the output of 24V shelves voltage.
Operation principle of the present utility model is as follows:
The analyzing and processing of all information and man-machine communication are that Single Chip Microcomputer (SCM) system is finished; Student's power supply is realized rectification, voltage stabilizing adjustment and the processing of student's over current protection of 0-24V AC power; The laboratory master control panel realizes that rectification, voltage stabilizing adjustment, teacher's stabilized voltage power supply electric current and voltage of 0-24V AC power detect and the man-machine communication---comprise that button is handled and digital the demonstration; Main circuit, solenoid control, teacher, each power supply stepping of student switch, and the detection of student's total current, low-voltage, high-current, AC-input voltage is to be finished by laboratory master control power supply box.
The utility model beneficial effect compared with prior art is that whole device adopts Single Chip Microcomputer (SCM) system control; the man-machine communication is convenient directly perceived, the switching of each power supply, gear shift, and the overload flow short-circuit protection is sensitive quick; avoid the circuit elements components from being damaged, its protective value is good, reliable operation.
Description of drawings
Accompanying drawing 1 is a laboratory master control power supply box overload protecting circuit schematic diagram;
Accompanying drawing 2 is that circuit theory diagrams are adjusted in laboratory master control panel parameter detecting and voltage stabilizing;
Accompanying drawing 3 is student's over current protection circuit theory diagrams;
Accompanying drawing 4 is the utility model Single Chip Microcomputer (SCM) program block diagram;
Accompanying drawing 5 is the utility model Single Chip Microcomputer (SCM) program overload protection program flow diagram.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.Accompanying drawing 1 is a laboratory master control power supply box overload protecting circuit schematic diagram; low-voltage, high-current, student's total current, AC-input voltage detection signal send single-chip microcomputer 1 (AT89C51) to handle through integrated operatinoal amplifier group 1 (TL084), integrated electronic switch 1 (CD4052), modulus conversion chip 1 (TLC1549CP), single-chip microcomputer 1 with result through the break-make of photocoupler set 1 control relay group 1 coil voltage or send single-chip microcomputer 2 (AT89C2051) to handle after the break-make of photocoupler set 2 control relay groups 2 coil voltages.Accompanying drawing 2 is that circuit theory diagrams are adjusted in laboratory master control panel parameter detecting and voltage stabilizing, teacher exchange's electric current, teacher's DC voltage-stabilizing current detection signal send single-chip microcomputer 3 (AT89C51) to handle through integrated operatinoal amplifier group 2 (TL084), integrated electronic switch 2 (CD4052), modulus conversion chip 2 (TLC1549CP), single-chip microcomputer 3 is handled in conjunction with keying input information, a result part is sent the charactron display circuit, and a part send teacher's voltage stabilizing to adjust circuit through analog-digital chip 1 (TLC5615CP), integrated operatinoal amplifier group 2 (TL084).Accompanying drawing 3 is student's over current protection circuit theory diagrams; Z1 binding post 1 pin connects student's AC power 0-24V input; 3 pin connect and exchange the input of 12V power supply; 2 pin are public ground; under the normal operating conditions, the Q2 conducting, Q1 ends; student's relay coil gets electric, and student's AC power 0-24V input is sent into subsequent conditioning circuit by relay J R1 normally opened contact.When student's power source loads overload---when reaching certain load current, detect resistance R 7 (0.33 Ω/2W) get enough voltage makes the Q1 conducting, and Q2 ends, student's relay coil dead electricity, student's AC power 0-24V must not import and sent into subsequent conditioning circuit.At this moment, click normally closed reset button Z8RSET, the Q2 conducting, Q1 ends, and student's relay coil gets electric, and student's AC power 0-24V input is sent into subsequent conditioning circuit by relay J R1 normally opened contact, and circuit working recovers normal condition.Accompanying drawing 4 is the utility model Single Chip Microcomputer (SCM) program block diagram, student's main control module, teacher's main control module, operation of teacher main control module are respectively the main program of single-chip microcomputer 1, single-chip microcomputer 2, single-chip microcomputer 3, by serial communication, divide into groups switching executing module, student's total current low-voltage, high-current AC-input voltage detection module of student's main control module and student's voltage transitions Executive Module, student got in touch between these three main programs; Teacher's main control module and teacher's voltage transitions Executive Module, high direct voltage handover module, low-voltage, high-current control module are got in touch; Operation of teacher main control module and teacher's electric current and voltage detection module, teacher's voltage stabilizing adjusting module, get in touch by key processing module, driver module.Accompanying drawing 5 is a utility model Single Chip Microcomputer (SCM) program overload protection program flow diagram.
Claims (5)
1, a kind of laboratory power supply device, form by laboratory master control power supply and student's power supply, master control power supply in laboratory is made up of laboratory master control panel and laboratory master control power supply box, the laboratory master control panel is by rectification circuit, filter circuit, voltage stabilizing circuit, regulating circuit, the electrical parameters detection circuit, button inputting circuits, charactron and diode display circuit are formed, laboratory master control power supply box is by earth leakage protective device, transformer, rectification circuit, filter circuit, voltage stabilizing circuit, the electrical parameters detection circuit, the relay output circuit is formed, student's power supply is by rectification circuit, filter circuit, voltage stabilizing circuit, overload protecting circuit is formed, it is characterized in that: in master control power supply box overload protecting circuit, single-chip microcomputer 1 and single-chip microcomputer 2 are arranged, master control panel parameter detecting and voltage stabilizing are adjusted in the circuit, single-chip microcomputer 3 is arranged, student's main control module, teacher's main control module, the operation of teacher main control module is respectively single-chip microcomputer 1, single-chip microcomputer 2, the main program of single-chip microcomputer 3, pass through serial communication, student's main control module and student's voltage transitions Executive Module between these three main programs, student's switching executing module of dividing into groups, the contact of student's total current low-voltage, high-current AC-input voltage detection module; Teacher's main control module and teacher's voltage transitions Executive Module, high direct voltage handover module, low-voltage, high-current control module are got in touch; Operation of teacher main control module and teacher's electric current and voltage detection module, teacher's voltage stabilizing adjusting module, get in touch by key processing module, driver module.
2, a kind of laboratory power supply device according to claim 1 is characterized in that the electrical parameters detection circuit of laboratory master control panel and laboratory master control power supply box constitutes by induction coil, integrated transporting discharging, electronic switch, modulus conversion chip.
3, a kind of laboratory power supply device according to claim 1 is characterized in that laboratory master control panel regulating circuit is made of analog-digital chip, integrated transporting discharging, triode voltage stabilizing adjustment circuit.
4, a kind of laboratory power supply device according to claim 1 is characterized in that student's over current protection circuit is made of detection resistance R 7, overload protective relay JR1, triode Q1, Q2, resistance R 1-R6, electric capacity E1, E2, diode D2, D3, relay indicating light L1, alarm lamp L2, external reset button Z8.
5, a kind of laboratory power supply device according to claim 1, it is characterized in that laboratory master control power supply box transformer is divided into teacher's transformer, student's transformer, low-voltage, high-current transformer, high direct voltage transformer, laboratory master control power supply with five in transformer transformer independently, teacher's transformer and student's transformer all have 12V, 14V, 16V, 18V, 20V, 22V, the output of 24V shelves voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02277467 CN2572637Y (en) | 2002-10-10 | 2002-10-10 | Power supply for laboratory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02277467 CN2572637Y (en) | 2002-10-10 | 2002-10-10 | Power supply for laboratory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2572637Y true CN2572637Y (en) | 2003-09-10 |
Family
ID=33741056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02277467 Expired - Fee Related CN2572637Y (en) | 2002-10-10 | 2002-10-10 | Power supply for laboratory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2572637Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106504626A (en) * | 2017-01-12 | 2017-03-15 | 辽宁文彬教学设备有限公司 | Intelligent laboratory system |
-
2002
- 2002-10-10 CN CN 02277467 patent/CN2572637Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106504626A (en) * | 2017-01-12 | 2017-03-15 | 辽宁文彬教学设备有限公司 | Intelligent laboratory system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |