TWI405075B - Saving the power socket group monitoring circuit - Google Patents

Abstract

A monitoring circuit of a power-saving socket set has a main loop current detection circuit disposed on a main loop and a sub-loop current detection circuit disposed on a sub loop. A micro-controller calculates the current value transmitted by the main loop and the sub-loop to generate a determination so as to monitor the socket set precisely. When the loading connected to the main loop is closed or standby, the power measured by the monitoring circuit will be lower than the preset power, thereby cutting off the power supply of the sub-loop and closing the loading of the sub-loop. Hence, the power saving effect can be achieved.

Description

Saving power socket group monitoring circuit

The invention relates to a monitoring circuit design of a power supply circuit, in particular to a monitoring circuit for saving power socket groups.

A conventional computer outlet set is a socket set having a power plug and a plurality of sockets, and the sockets are connected to each other in parallel. When using, plug the power plug into a socket or an extension cord outlet, but only control the power supply status by the power switch set on the outlet group. When the user turns off the personal computer, in addition to shutting down the host computer of the personal computer, other computer peripheral devices connected to the host computer of the personal computer need to be turned off one by one to save the power of the peripheral device, thereby causing Inconvenience in use.

Different prior art techniques have been developed for control circuits for computer outlets. In the patented art, for example, Patent Publication No. 582588, in which a power supply state control circuit for a socket set for a computer is disclosed. A load detecting component having a predetermined resistance value is connected to one of the power sources of the AC power source, and the other end of the load detecting component is connected to the first end of the first socket on the socket group. The input end of the amplifying circuit is also connected to the first end of the first socket, and the voltage difference generated when the current is passed through the load detecting element is amplified.

Comparing whether the voltage outputted by the amplifying circuit input at the input terminal thereof is higher than a predetermined voltage by a comparison circuit, and outputting the voltage generated after the comparison is outputted from the output terminal thereof, and generating the output voltage through the receivable comparator circuit The electronically controlled switch of the action of the switch controls the second socket and the sockets connected in parallel thereafter.

When the electrical device inserted in the first socket is not energized, the electrical control relationship is in an open state, so that the second end of the socket and the second socket connected in parallel with the second socket is disconnected from the second end of the first socket. Provide power. When the electric appliance inserted in the first socket is energized, the electric control switch is made to be a passage, so that the second socket and the socket connected to the rear thereof are connected to the AC power source and the second end passage of the first socket is further provided. power supply.

Today's electrical load connection type generally uses a master-slave architecture, such as a computer host, a list machine, a display, a scanner, and a master and slave load architecture. The computer host plays the master device, and the list machine The display and scanner act as slave loads. As long as the computer host is turned off, the lister, display, and scanner do not need to continue to supply power. Otherwise, even if each device is in a standby state, it actually continues to consume power. For example, in a main control and subordinate load structure composed of a television, a VCR, and an external speaker, the TV plays a master device, and the VCR and the external speaker play a slave load. As long as the TV is turned off, the video recorder and the external speaker do not need to continue to supply power. Otherwise, even if each device is in the standby state, it actually continues to consume power. Traditional power supply types are not suitable for applications with master and slave load architectures.

The control circuit of the computer socket group in the previous case utilizes a load detecting component connected in series with the first socket to have a predetermined resistance value to sense the flow through The current value of the main current of a socket is amplified by the amplifier circuit to amplify the voltage difference generated by the main current input from the input terminal through the load detecting component.

Finally, the voltage outputted by the amplifying circuit input at the input end thereof is higher than a predetermined voltage by the comparison circuit, and the voltage generated after the comparison is outputted from the output terminal thereof and generated through the output voltage of the receivable comparison circuit. The electronically controlled switch of the action of the switch controls the second socket and the sockets connected in parallel. In fact, the computer has a desktop type and a notebook type. Because the current signal of the notebook computer is weak, the previous case cannot control the slave circuit to turn on and off correctly to save power when the notebook computer is turned off and in standby state.

However, although the second socket and the socket connected thereto are controlled by the load detecting component connected in series by the first socket, the standby current of the computer host on the first socket changes according to the voltage of the AC power source, that is, when When the power supply voltage rises, the standby current decreases. When the power supply voltage drops, the standby current rises and the same standby power is presented. However, the standby current changes with the change of the mains voltage, so a preset current value is used to control the socket connected to the second socket and the rear thereof, and the AC power supply voltage that is not in conformity with the commercial power is not fixed.

When there is any fault in the socket group caused by overload, etc., the control circuit of the computer socket group of the previous case can only judge whether the first socket of the load detection component connected in series has normal function. Know the condition of the second socket and the socket to which it is connected.

Accordingly, it is a primary object of the present invention to provide an energy-saving outlet set having a monitoring function circuit for integrating a monitorable circuit into a power-saving outlet group.

Another object of the present invention is to provide an energy-saving outlet group that can synchronously control the power supply of a slave loop by turning on and off the computer.

The technical means adopted by the present invention to solve the problems of the prior art is that a main loop current detecting circuit is disposed on a main circuit, and a slave loop current detecting circuit is disposed in the slave circuit. The micro-controller is used to monitor the outlet group by accurately calculating the current value of the incoming main loop and the slave loop current. When the load connected to the main circuit is turned off or standby, the power measured by the monitoring circuit will be lower than the set power value, so the power supply of the slave circuit will be turned off, so that the load of the slave circuit is turned off, and the power saving effect can be achieved.

According to the technical means adopted by the present invention, when the host of the personal computer inserted in the socket of the main circuit is turned off, the slave loop control signal generated by the micro controller of the monitoring circuit of the power saving socket group can be borrowed by the present invention. By controlling the slave circuit switch unit to synchronously close the computer peripheral devices such as the display, the speaker, the printer, etc. inserted into the socket of the slave circuit, the standby power of the computer peripheral devices on the slave circuit can be saved, and the slave circuit can be solved one by one. It is not convenient to power on each computer peripheral device. The monitoring circuit of the present invention can be used as a monitoring of the power supply conditions of the entire circuit.

The specific embodiments of the present invention will be further described by the following examples and the accompanying drawings.

Referring to Fig. 1, there is shown a block diagram showing a control circuit of an embodiment of a monitoring circuit for saving power sockets of the present invention, and Fig. 2 is a view showing a further control circuit of the embodiment of Fig. 1. In the present invention, a main circuit L1 is formed between the first power terminal 11 and a second power terminal 12 of the AC power source ACV, and a first socket 21 is included in the main circuit L1.

A total loop current detecting circuit 30 is connected in series to the main loop L1. The first end node 13 of the first socket 21 is connected to the first power terminal 11 of the AC power source ACV, and the second end node 14 is connected to the second power terminal 12 of the AC power source ACV via the total loop current detecting circuit 30.

The nodes 13 and 14 at both ends of the first socket 21 have a slave circuit L2 connected in parallel, and the slave circuit L2 includes a slave circuit switch unit SW1, a second socket 22, a third socket 23 and a slave loop current detecting circuit 40.

Referring to FIG. 2, the total loop current detecting circuit 30 includes a resistor 31 and an amplifier 32. The resistor 31 is connected in series to the main loop L1, and the amplifier 32 is connected across the resistor 31. The amplifier 32 can be used to sense the total current I4 through the resistor 31, and then send a total loop current signal I4' to a monitoring circuit 50. The slave loop current detecting circuit 40 includes a resistor 41 and an amplifier 42. The resistor 41 is connected in series to the slave loop L2, and the amplifier 42 is connected across the resistor 41. The amplifier 42 can be used to sense the pass. The total slave current I5 of the resistor 41 is based on which a slave loop current signal 15' is sent to the supervisory circuit 50.

In this embodiment, the main circuit L1 includes a socket 21, and the slave circuit L2 includes two sockets 22 and 23. In practical applications, Increase or decrease the number of sockets as needed.

In the design of the present invention, the first socket 21 passes a main current I1 when the load placed on the first socket 21 in the main circuit L1 is activated. When the load inserted in the second socket 22 and/or the third socket 23 of the slave circuit L2 is activated, the second socket 22 passes a slave current I2, and the third socket 23 passes a slave current I3, and the slave current The total slave current I5 formed by I2, I3 can be detected by the slave loop current detecting circuit 40. The main circuit L1 and the slave circuit L2 form a total current I4, which can be detected by the total loop current detecting circuit 30.

A voltage detecting circuit 60 is connected between the first power terminal 11 and the second power terminal 12 of the AC power source ACV, and can be used to detect the voltage condition of the AC power source ACV and generate a voltage signal V to the monitoring circuit 50.

The monitoring circuit 50 includes a microcontroller microcontroller 51 that receives the total loop current signal I4' sent by the total loop current detecting circuit 30 via the analog to digital converter 52, and receives the slave loop current via the analog to digital converter 53. The slave loop current signal I5' sent from the detection circuit 40 and the voltage signal V generated by the voltage detection circuit 60 via the analog to digital converter 54 are received.

After receiving the total loop current signal I4' and the slave loop current signal I5' and the voltage signal V, the monitoring circuit 50 can calculate the main loop power value Wm = (I4 - I5) xV of the main loop L1. The user can press a standby power setting button SW2 connected to the microcontroller microcontroller 51 to record the main circuit power value at this time, and record the power value at this time as the set power value Wmset, and store it in a memory. 55.

When the first socket 21 in the main circuit L1 and the second socket 22 and/or the third socket 23 of the slave circuit L2 are both loaded with loads and the loads are in a power state, the monitoring circuit 50 calculates the main circuit at that time. The power value Wm is determined, and the main circuit power value Wm is determined to be greater than the set power value Wmset. At this time, the monitoring circuit 50 generates a slave circuit control signal S1 via a driving circuit 56 to make the state of the slave circuit switching unit SW1 closed. The second socket 22 and the third socket 23 inserted in the slave circuit L2 are in a power supply state.

When the load of the first outlet 21 in the main circuit L1 is turned off, the monitoring circuit 50 calculates that the current main circuit power value Wm is less than the set power value Wmset. At this time, the monitoring circuit 50 controls the slave circuit switch via the slave circuit control signal S1. The state of the unit SW1 is an open circuit, and the second socket 22 and the third socket 23 of the slave circuit L2 are in a power-off state.

With the above principle, when the load (such as a host computer, a television, etc.) connected to the first socket 21 in the main circuit L1 is turned off or standby, the power Wm measured by the monitoring circuit 50 is lower than the set power value Wmset, so The power supply of the slave circuit L2 is turned off, so that the load of the second socket 22 and the third socket 23 of the slave circuit L2 (such as a computer display screen, a list machine, a video recorder, etc.) is turned off, and the power saving effect can be achieved.

It can be seen from the above embodiments that the monitoring circuit of the power saving socket group provided by the present invention has industrial value. The present invention is particularly suitable for, for example, a host computer, a list machine, a display, and a scanner, and has a master control and a slave. The application of the load architecture is also applicable to applications with a master and slave load architecture, such as a television set, a video recorder, and an external speaker. Therefore, the present invention has met the requirements of the patent. However, the above description is only a preferred embodiment of the present invention. It is to be understood that those skilled in the art can make various other modifications in light of the above description, but such changes are still within the scope of the invention and the scope of the invention as defined below.

11‧‧‧First power terminal

12‧‧‧second power terminal

13, 14‧‧‧ nodes

21‧‧‧First socket

22‧‧‧second socket

23‧‧‧ Third socket

30‧‧‧Total loop current detection circuit

31‧‧‧resistance

32‧‧‧Amplifier

40‧‧‧Subordinate loop current detection circuit

41‧‧‧resistance

42‧‧‧Amplifier

50‧‧‧Monitoring circuit

51‧‧‧Microcontroller

52, 53, 54‧‧‧ analog to digital converters

55‧‧‧ memory

56‧‧‧Drive circuit

60‧‧‧Power supply voltage detection circuit

ACV‧‧‧AC power supply

I1‧‧‧main current

I2‧‧‧Subordinate current

I3‧‧‧Subordinate current

I4‧‧‧ total loop current

I5‧‧‧ total slave current

I4’‧‧‧ total loop current signal

I5’‧‧‧Subordinate loop current signal

L1‧‧‧ main circuit

L2‧‧‧ slave circuit

S1‧‧‧Subordinate loop control signal

SW1‧‧‧Subordinate circuit switch unit

SW2‧‧‧Standby power setting button

V‧‧‧ voltage signal

Wmset‧‧‧Set power value

1 is a block diagram showing a control circuit of an embodiment of a monitoring circuit for saving power sockets of the present invention; and FIG. 2 is a further control circuit diagram showing an embodiment of FIG. 1.

11‧‧‧First power terminal

12‧‧‧second power terminal

13, 14‧‧‧ nodes

21‧‧‧First socket

22‧‧‧second socket

23‧‧‧ Third socket

30‧‧‧Total loop current detection circuit

40‧‧‧Subordinate loop current detection circuit

50‧‧‧Monitoring circuit

56‧‧‧Drive circuit

60‧‧‧Power supply voltage detection circuit

ACV‧‧‧AC power supply

I1‧‧‧main current

I2‧‧‧Subordinate current

I3‧‧‧Subordinate current

I4‧‧‧ total loop current

I5‧‧‧ total slave current

I4’‧‧‧ total loop current signal

I5’‧‧‧Subordinate loop current signal

L1‧‧‧ main circuit

L2‧‧‧ slave circuit

S1‧‧‧Subordinate loop control signal

SW1‧‧‧Subordinate circuit switch unit

SW2‧‧‧Standby power setting button

V‧‧‧ voltage signal

Claims (5)

A monitoring circuit for saving an electrical power socket group is connected to two power terminals that are connected to an AC power supply and includes a main circuit and a slave circuit. The monitoring circuit includes: a total loop current detecting circuit connected to the main circuit, Detecting a current value of a main loop current passing through the main loop, and generating a total loop current signal; a slave loop switch unit connected to the slave loop; and a slave loop current detecting circuit connected to the slave loop And detecting a current value of the slave circuit, and generating a slave loop current signal; a monitoring circuit connected to the total loop current detecting circuit and the slave current detecting circuit for respectively receiving the total loop current a total loop current signal generated by the detecting circuit and a slave loop current signal generated by the slave loop current detecting circuit; wherein the monitoring circuit receives the total loop current signal and the slave loop current signal, and calculates a main loop power value of the main loop, And determining that the main circuit power value is greater than a set power value, the monitoring circuit is via a slave The path control signal controls the state of the slave loop switch unit to be closed; and when the main loop power value of the master loop is less than the set power value, the monitoring circuit controls the state of the slave loop switch unit to be open via a slave loop control signal . The monitoring circuit of the power saving socket group according to claim 1, wherein the total loop current detecting circuit includes a resistor and an amplifier, wherein the resistor is serially connected to the main loop, and the amplifier is a cross Connected to both ends of the resistor. The monitoring circuit of the power saving socket group according to claim 1, wherein the slave loop current detecting circuit comprises a resistor and an amplifier, wherein the resistor is serially connected to the slave loop, and the amplifier is a cross Connected to both ends of the resistor. The monitoring circuit of the power saving socket group according to claim 1, wherein the monitoring circuit further comprises a standby power setting button, and when the standby power setting button is pressed and pressed, the main circuit power value is stored and recorded. In a memory connected to a microcontroller, the main loop power value is recorded as a set power value. The monitoring circuit of the power saving socket group described in claim 1 further includes a voltage detecting circuit connected to the alternating current power source for detecting a voltage condition of the alternating current power source and generating a voltage signal to the monitoring Circuit.