KR20070115385A - Wireless monitoring and control of load - Google Patents

Abstract

The present invention relates to a wireless monitoring and control device for a load. The present invention arbitrarily changes the reference current value while opening and closing the current supplied from the power supply to the electrical load, and monitor and record the state or change of the current in real time to accurately analyze the cause of the accident when an accident occurs, and the state of the current is determined to be overcurrent. In the wireless monitoring and control device of the load for detecting and controlling the state or fluctuation of the current supplied from the commercial AC power supply 10 to the electric load 30, such as a motor or a washing machine, to generate an alarm when the commercial AC power supply, A wireless module 50 for detecting a current value supplied from the power supply 10 to the electric load 30, converting the current value into a signal, and transmitting and receiving wirelessly; A circuit breaker (60) for opening and closing a current supply from the commercial AC power supply (10) to the electric load (30); By electrically transmitting and receiving signals to and from the trip module 70 and the wireless module 50 which are electrically connected to the wireless module 50 and trip to open and close the circuit breaker 60, Provided is a wireless monitoring and control apparatus for a load, comprising a central control unit 80 on a wireless network for controlling and monitoring status.

Description

Wireless monitoring and control of load {AN APPARATUS FOR MONITORING AND CONTROLLING A LOAD WITH RADIO}

1 is a block diagram showing the overall configuration according to an embodiment of the present invention;

FIG. 2 is a block diagram showing the configuration of a central control apparatus on the wireless network shown in FIG.

[Explanation of simple symbols for the main parts of the drawings]

10 commercial AC power, 30, 31 ~ 3N electrical load,

50, 51 ~ 5N wireless module, 60, 61 ~ 6N circuit breaker,

70, 71 ~ 7N trip module, 80 central control unit.

The present invention relates to a wireless monitoring and control device for a load, and more particularly, various electrical loads such as a motor, a washing machine, a blower and a lamp while wirelessly transmitting and receiving various data with a central control device on a network using a low power Zigbee module. The present invention relates to a wireless monitoring and control device for a load that monitors and controls the condition of the alarm and generates an alarm even in an emergency situation.

In general, wireless networks for transmitting data wirelessly include WLAN, Bluetooth, ZigBee, and the like.

Dual WLAN has excellent security, but has strong radio wave interference and relatively high power consumption. In addition, Bluetooth is mainly used for transmitting and receiving voice signals, but is useful for communication devices requiring complex functions, but relatively high in cost and high power consumption. In addition, Zigbee can transmit data at a low speed of 20 to 250 Kbps at a short distance of 1 to 100 m and has low power consumption.

Accordingly, ZigBee has a feature that ZigBee is superior to WLAN or Bluetooth in terms of miniaturization and power consumption.

On the other hand, when an electric load such as a motor, a washing machine, etc., which is being used, the electric load is damaged due to an overcurrent, and thus an earth leakage breaker is used to prevent a fire from occurring in the place where the electric load is used. have.

Such an earth leakage circuit breaker detects a current value supplied from the power supply side to an electric load when driving an electric load such as a motor or a washing machine, compares it with a preset reference current value, and if an overcurrent is determined, drives the overcurrent relay to excite the trip coil. The breaker is opened (off) to cut off the supply of current from the power source to the electrical load.

In this case, some types of earth leakage breakers used may be maintained after the circuit breaker is turned off. However, the circuit breaker may be turned on after a predetermined time has elapsed, and current supply from the power supply side to the electric load may be started. .

However, the conventional ground fault interrupting device cannot change again when the reference current value supplied to the electric load is set, and there is a problem in that the state or fluctuation of the current supplied to the electric load cannot be grasped in real time.

In addition, there is a problem that it is not possible to remotely control the current supplied to the electrical load in the event of an emergency situation such as a fire, and also to accurately determine the cause of the accident.

Accordingly, an object of the present invention is to wirelessly monitor and control a load capable of arbitrarily changing a reference current value while controlling a current supply from a power supply side to an electrical load on a wireless network by using a Zigbee module when driving an electrical load such as a motor or a washing machine. To provide.

In addition, another object of the present invention is to provide a wireless monitoring and control device of the load that can accurately record the status or fluctuations of the current supplied to the electrical load from the power supply in real time to accurately analyze the cause of the accident.

In addition, another object of the present invention is to provide a wireless monitoring and control apparatus for a load that can generate an alarm when the state of the current supplied from the power source to the load is determined to be overcurrent.

The above and other objects and novel features of the present invention will become apparent from the description of the specification and the accompanying drawings.

The outline | summary of the typical thing of the invention disclosed in this application is briefly described as follows.

In order to achieve the above object, the present invention provides a wireless monitoring and control apparatus for a load for detecting and controlling the state or fluctuation of a current supplied from a commercial AC power source to an electric load such as a motor or a washing machine. A wireless module that detects and converts a current value supplied to the electric load into a signal and wirelessly transmits and receives a current value; A circuit breaker for opening and closing a current supply from the commercial AC power supply to the electric load; A trip module electrically connected to the wireless module and performing a trip to open and close the circuit breaker; And a central controller on the wireless network for controlling and monitoring the state of the electrical load by transmitting and receiving signals wirelessly with the wireless module.

The wireless module may include a current transformer configured to detect a current value supplied from the commercial AC power in real time, and a Zigbee module configured to convert a current value detected by the current transformer into a signal and then transmit and receive the signal wirelessly.

In addition, the current transformer has a built-in ZigBee module, the ZigBee module includes a data transceiver for converting various data into a signal and then wirelessly transmitting and receiving and a microprocessor for processing a variety of data in accordance with a predetermined built-in program It features.

Next, the trip module may include a trip coil for opening and closing the circuit breaker and an overcurrent relay for driving the trip coil according to the current value detected by the wireless module.

In addition, the central controller recognizes the radio module, allocates an IP, transmits and receives signals wirelessly, and transmits text and various data processed by the computer to perform various data processing according to a predetermined program. Characterized in that the display includes a display.

The wireless module and the central control unit may be connected to a wireless network of a master-slave type or a mesh type.

In addition, the central controller may generate an alarm when the current value supplied from the electric load to the computer through the Zigbee module is greater than the alarm generation current value preset and stored in the computer. It further comprises an alarm device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the whole figure for demonstrating embodiment of this invention, the thing with the same function attaches | subjects the same code | symbol, and the repeated description is abbreviate | omitted.

1 is a block diagram showing the overall configuration according to an embodiment of the present invention, Figure 2 is a block diagram showing the configuration of a central control device on the wireless network shown in FIG.

As shown in Figures 1 and 2, the present invention is largely the wireless monitoring of the load to detect and control the state or fluctuation of the current supplied to the electric load 30, such as a motor or a washing machine, from a commercial AC power supply 10 and A control device comprising: a wireless module (50); A circuit breaker (60); Trip module 70 and the central control unit 80 is included.

The wireless module 50 (51 to 5N) is preferably composed of a current transformer (CT) (CT1 ~ CTN) and ZigBee module (ZNB) (ZB1 ~ ZBN), and the electric power in the commercial AC power source (10) The current value supplied to the loads 30 and 31 to 3N is detected and converted into a signal, and then wirelessly transmitted and received with the central controller 80 on the wireless network.

More specifically, the current transformer CT (CT1 ~ CTN) is preferably composed of an image current transformer, the current value supplied to the electrical load 30 (31 ~ 3N) electrically connected from the commercial AC power supply (10). Detect in real time.

Next, the ZigBee modules ZNB (ZB1 to ZBN) are preferably composed of a data transmission / reception unit (DSR) and a microprocessor (MP), and are detected in real time by the current transformers CT (CT1 to CTN). The current value is converted into a signal by the microprocessor MP, and then wirelessly transmitted and received with the central controller 80 on the wireless network through the data transmission / reception unit DSR.

In this case, the microprocessor MP compares the current value detected by the current transformers CT1 to CTN with a reference current value previously stored in a memory device of the microprocessor MP, and compares the current value to the power source 10. It is determined whether the current supplied to the loads 30 (31 to 3N) is an overcurrent, and the result is transmitted to the trip module 70 and wirelessly transmitted to the central controller 80 on the wireless network.

Next, the circuit breaker 60 is preferably composed of a relay or a push button of the contact b, and the electric load 30, 31N on the power supply 10 side according to the operation of the trip module 70. Open / close the supply of the electric current supplied to ().

In addition, the trip module 70 is preferably composed of a trip coil (TC) (TC1 ~ TCN) and an overcurrent relay (OC) (OC1 ~ ONC), the wireless module 50, 51 ~ 5N and electrical Is connected to the circuit breaker (60) (61 ~ 6N) is tripped to open and close.

The trip coil TC TC1 to TCN determines by the microprocessor MP whether the current value detected by the current transformers CT1 to CTN of the wireless module 50 exceeds a preset reference current value. do.

As a result of this determination, if it is determined that the overcurrent is present, the overcurrent relay OC is driven to excite the trip coil TC to open the circuit breaker 60 to turn off the commercial AC power supply 10. On the side to cut off the current supplied to the electric load 30 (31 ~ 3N). In addition, when it is not determined that an overcurrent is maintained, the circuit breaker 60 is kept closed (on) and the current is continuously supplied from the commercial AC power supply 10 to the electric loads 30 (31 to 3N). do.

Next, the central controller 80 on the wireless network is preferably composed of a computer 81 and an alarm device 85 such as a display 83 or a buzzer, and the wireless module using a built-in Zigbee module. The signal is transmitted and received wirelessly with the ZigBee module ZB (ZB1 to ZBN) of 50 to control while monitoring the state of the electric load 30.

In addition, the computer 81 is preferably composed of a ZigBee module, a microprocessor, a storage device that stores various programs, and the like, after converting various data into a signal and wirelessly transmitting and receiving the signals, and installed on the electrical load 30 side. Recognize the ZigBee modules ZB (ZB1 to ZBN) on the wireless modules 50 and 51 to 5N, assign IPs to each other, and then wirelessly transmit and receive signals with the ZBB modules ZB1 to ZBN. Various processing is performed.

At this time, the Zigbee module (ZB) (ZB1 ~ ZBN) of the wireless module 50 and the Zigbee module built in the computer 81 of the central control unit 80 is a master-slave or mesh (mesh) form. It is desirable to be connected to a wireless network.

In addition, the display 83 is preferably composed of a CRT, an LCD, or the like, and displays various processes and data processed by the computer 81 in letters or graphics.

In addition, the alarm device 85 is preferably configured as a beeper for generating an alarm through a sound or an alarm device for generating an alarm through a sound and a display device, in the wireless module 50 (51 to 5N) The current value detected by the current transformers CT (CT1 to CTN) is transmitted to the computer 81 through the ZigBee modules ZB (ZB1 to ZBN).

Subsequently, the computer 81 compares the current value received through the built-in Zigbee module with the alarm generation current value stored in the storage device, and then the received current value is larger than the alarm generation current value stored in the storage device of the computer 81. In this case, the alarm device 85 is driven to generate an alarm through a sound or a sound and a display device, thereby preventing damage to the electrical loads 30 and 31 to 3N or a fire caused by this.

As mentioned above, although the invention made by this inventor was demonstrated concretely based on embodiment, this invention is not limited to the said embodiment, Needless to say that various changes are possible within the range which does not deviate from the summary.

As described above, according to the present invention, when the electric load such as a motor or a washing machine is driven, the state or variation of the current supplied from the power supply to the electric load is recognized in real time using the Zigbee module and the central control unit on the wireless network. Since the reference current value supplied to the electric load can be arbitrarily changed, there is an effect that it is possible to prevent the damage of the electric load or the occurrence of fire due to this. In addition, there is an effect that it is possible to accurately determine the cause of the accident or fire by using the data recorded on the central control unit on the wireless network when the appeal occurs.

In addition, according to the present invention, since the Zigbee module and the central control unit on the wireless network are used, there is an effect that the reference current value for opening and closing the current supplied to the electric load from a remote location can also be arbitrarily changed.

In addition, according to the present invention, since the Zigbee module and the central control unit and the alarm unit on the wireless network are used, when the current supplied to the electric load is determined to be overcurrent, damage to the electric load or the occurrence of fire through the sound or the sound and the display device is prevented. There is also the effect of being able to warn in advance in various forms.

Claims (8)

In the wireless monitoring and control device of the load for detecting and controlling the state or fluctuation of the current supplied from the commercial AC power supply 10 to the electric load 30, such as a motor or a washing machine, A wireless module 50 which detects a current value supplied from the commercial AC power supply 10 to the electric load 30, converts it into a signal, and transmits and receives wirelessly; A circuit breaker (60) for opening and closing a current supply from the commercial AC power supply (10) to the electric load (30); A trip module 70 electrically connected to the wireless module 50 to trip the circuit breaker 60 to be opened and closed; Wireless monitoring and control device of the load, characterized in that it comprises a central control unit 80 on the wireless network for controlling while monitoring the state of the electrical load 30 by transmitting and receiving a signal wirelessly with the wireless module 50 . The method of claim 1, The wireless module 50, a current transformer (CT) for detecting the current value supplied from the commercial AC power supply in real time and a Zigbee module for transmitting and receiving wirelessly after converting the current value detected by the current transformer (CT) to a signal Wireless monitoring and control of the load comprising a (ZB). The method of claim 2, The current transformer (CT) is a wireless monitoring and control device of the load, characterized in that the built-in ZigBee module (ZB). The method according to claim 2 or 3, The Zigbee module (ZB) comprises a data transmission and reception unit (DSR) for converting various data into a signal and then wirelessly transmitting and receiving and a microprocessor (MP) for processing a variety of data in accordance with a predetermined built-in program Wireless monitoring and control of the load. The method of claim 1, The trip module 70 may include a trip coil TC for opening and closing the circuit breaker 60 and an overcurrent relay OC for driving the trip coil TC according to a current value detected by the wireless module 50. Wireless monitoring and control of the load comprising a. The method of claim 1, The central controller 80 recognizes the radio module 50 and assigns an IP, and then performs a variety of data processing according to a predetermined program mounted on the computer 81 and the computer 81 while transmitting and receiving signals wirelessly. Wireless monitoring and control device for a load, characterized in that it comprises a display (83) for displaying a variety of data processed in the character or figure. The method of claim 1, The wireless module 50 and the central control unit 80 is a wireless monitoring and control device of the load, characterized in that connected to a wireless network of the master-slave form or mesh (mesh) form. The method of claim 6, The central controller 80 is configured to store the current value supplied to the electric load transmitted from the electric load 30 to the computer 81 through the Zigbee module ZB in advance and stored in the computer 81. And a warning device (85), such as a buzzer, for generating an alarm when the generated current value is larger than the generated current value.

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