CN2461183Y

CN2461183Y - Controller for power of multiple desk of laboratory

Info

Publication number: CN2461183Y
Application number: CN 00241001
Authority: CN
Inventors: 马自应
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-11-14
Filing date: 2000-11-14
Publication date: 2001-11-21
Anticipated expiration: 2010-11-14

Abstract

The utility model relates to a power controller for of seats of a laboratory. The utility model is device which is suitable for the centralized control of the power of the laboratory. The controller adopts a data input interface circuit as a signal inlet, and the output end of the controller is connected with a data buffering latch circuit and an address decoding circuit. The output end of the address decoding circuit is connected with the data buffering latch circuit. A data interface and level drive circuit, a first stage relay output circuit, and a second stage relay output circuit are connected orderly in series. The second stage relay output circuit is used for directly driving controlled objects. The controller can be used for carrying out the centralized control of the power of a plurality of experiment tables. The utility model is especially suitable for open laboratories.

Description

Seat, laboratory power-supply controller of electric

The utility model is a kind of breadboard seat power supply Centralized Controller that is applicable to, belongs to the technical field of laboratory with control appliance.

Breadboard power supply generally is installed in the top or the next door of each experimental bench, as long as also have a people to do experiment in the laboratory, just breadboard general supply must be opened, thereby the supply socket of each experimental bench must have power supply, therefore need not be the people of experiment and be the people who tests and still can have freely used power supply, can cause breadboard managerial confusion like this, device damage, even the danger of casualties, address this problem, just must be respectively divide other control, therefore have several devices that can control each experimental bench power supply respectively at present, as installation and control device respectively on each experimental bench the power supply of breadboard each experimental bench, 40 experimental benches are even arranged, just will adorn 40 power-supply controller of electric respectively, do like this that not only cost is too high, and the workload of safeguarding is also big.Another is the inside that control assembly is installed in computer, and the shortcoming of doing like this is the resource that has taken computer; Therefore there is compatible problem, and destroyed the general structure of computer.

Goal of the invention of the present utility model just provides a kind of to central controlled seat, the laboratory power-supply controller of electric that is used for the open management in laboratory of a plurality of experimental bench power supplys.

Seat, laboratory of the present utility model power-supply controller of electric mainly is made up of data acquisition circuit, signal processing circuit, drive circuit, this controller is a signal input port with the Data Input Interface circuit, its output termination data buffering latch cicuit and address decoding circuitry, the output termination data buffering latch cicuit of address decoding circuitry, data-interface, level drive circuit, first order relay output circuit, second level relay output circuit are connected in series in order, the direct drive controlling object of second level relay output circuit.The output of integrated circuit in the address decoding circuitry " U2C " directly connects " E2 " end of integrated circuit " U5 " and " 1 G, 2 G " end of integrated circuit " U1 ".

Address decoding circuitry can be selected decoding plot XXXH by wire jumper, and main control computer is exported the 8bit digital quantity from the parallel port to this plot XXXOH-XXX7H.This 8 group address is through decoding, and the corresponding latch of gating is exported 64 line state digital quantities successively.Every line state digital quantity drives through Transistor-Transistor Logic level, the folding of control first order 5VDC relay.First order relay is output as the 12V DC level, is supplied with by high power D C Switching Power Supply, is delivered to the corresponding end second level, experiment seat relay.The end second level, seat relay is directly controlled the break-make of this seat 220V power supply for exchanging the heavy load relay.

The seat power-supply controller of electric is a kind of controller that is used for lab management system.After the student held legal card and enters the laboratory, seat power-supply controller of electric and computer communication received student's the information and the state information of each equipment of laboratory, distribute to seat number of student then, and open the device power supply (DPS) on this seat automatically.Because the seat power-supply controller of electric is seat allocation and opening device power supply automatically, so the teacher is as long as send out card legal to allowing to enter student that the laboratory experimentizes, do not allow not hair fastener of the student that tests, unattended duty just can be accomplished in the laboratory, and modern open management just can be realized in the laboratory.

Advantage of the present utility model is:

1. cost is low, easy to use.Because the utility model has adopted central controlled mode, rather than each experimental bench one cover controller, greatly reduce the cost of complete equipment, especially have tens or the time up to a hundred when breadboard experimental bench, more can demonstrate the low advantage of the utility model cost, also more convenient during use.

2. easy to maintenance.Installation of the present utility model does not destroy original breadboard circuit structure, and is not only easy for installation, and is convenient to safeguard.

3. be convenient to breadboard centralized management.Because this controller establishes one's own system, do not need the computer resource on each seat, so this controller not only is applicable to the open management of computer floor, and goes for any breadboard open management.

4. safe and reliable: the secondary relay drives the design of output, has adopted secondary power supply to isolate and has supplied with, and the level of having avoided the folding of back level relay to be caused disturbs, and has guaranteed the reliable operation of front end light current circuit.The following of 12V control level send, and also the centralized control for 64 road seat power supplys provides safe and effective solution.

Fig. 1 is a schematic block circuit diagram of the present utility model.

Fig. 2 is the circuit theory diagrams of the utility model Data Input Interface circuit 1, data buffering latch cicuit 2, address decoding circuitry 3, data-interface 4.

Fig. 3 is the electrical schematic diagram that the utility model secondary relay drives output.

Embodiment of the present utility model is as follows:

Data Input Interface circuit 1 is mainly " P1 ", and its model is: CON AT62 ", data buffering latch cicuit 2 is based on integrated circuit U1, U6-U13 ", the model of integrated circuit U1 is " 74LS244 ", integrated circuit " U6-U13 " is " 74LS74 ".Address decoding circuitry (3) is mainly based on integrated circuit " U2, U3, U4, U5 ", and the model of integrated circuit " U3, U4 " is " 74LS136 ", and the model of " U5 " is " 74LS138 ", and the model of " U2 " is " 74LS00 ".Level drive circuit 5 is how many decisions at seat according to controlling object, and every integrated circuit " ULN2003 " has 7 tunnel outputs, and each road output connects first order relay output circuit 6 respectively, by the way decision of relay J 1-Jn by control.The model of relay is " RELAY-SPST ".Second level relay output circuit 7 is subjected to the control of first order relay, and relay output in the second level directly drives the source, Shen.So just, formed the utility model.

Claims

1. seat, laboratory power-supply controller of electric, by data acquisition circuit, signal processing circuit, drive circuit is formed, it is characterized in that this controller is a signal input port with Data Input Interface circuit (1), its output termination data buffering latch cicuit (2) and address decoding circuitry (3), the output termination data buffering latch cicuit (2) of address decoding circuitry (3), data-interface (4), level drive circuit (5), first order relay output circuit (6), second level relay output circuit (7) is connected in series in order, and second level relay output circuit (7) is drive controlling object (8) directly.

2. seat, laboratory according to claim 1 power-supply controller of electric is characterized in that the output of integrated circuit " U2C " in the address decoding circuitry (3) directly connects " E2 " end of integrated circuit " U5 " and " 1 G, 2 G " end of integrated circuit " U1 ".