KR20010039272A - Error detection method and apparatus for elevator - Google Patents

Abstract

PURPOSE: An elevator fault detection method and its apparatus are provided to detect the elevator fault without the breakdown detection circuit. CONSTITUTION: The elevator fault detection apparatus comprises a main power supplier(1) for supplying the transformed voltage to each unit, a breakout monitoring unit(2) for monitoring the breakdown of the main power supplier and for generating the corresponding interrupt signal, a power supplier(3) for supplying the various level operating voltages to a main control unit(4) by receiving the power from the main power supplier, and the main control unit for controlling its own elevator operation functions, for resetting the internal normal power flag when it receives an interrupt signal, and for analyzing the fault cause and for managing the supervisory functions when the power is recovered. The logger unit logs various fault histories to the printer or the display unit.

Description

Fault detection method and device of elevator {ERROR DETECTION METHOD AND APPARATUS FOR ELEVATOR}

The present invention relates to a technique for detecting the cause of the down of the operation control panel in an elevator, and in particular, so as to be suitable for detecting that the microcomputer mounted in the operation control panel is down regardless of the main power failure without using a separate power monitoring circuit. The present invention relates to a failure detection method and apparatus for an elevator.

In general, the driving control panel of an elevator manages various control operations for driving a car on a floor according to a hall call by a passenger waiting at a platform on each floor or a call by a passenger on a car. In other words, in order to safely drive the car toward the target floor, the driving control panel checks the safety operation of each part of the system and performs various arithmetic functions for controlling the driving distance and the speed. Is mounted.

In order to supply stable power to the operation control panel, a separate power supply (SMPS) is generally used. Therefore, the power supply device has an absolute influence on the normal operation of the operation control panel, and in view of this point, in the conventional elevator, a separate power failure detection circuit is used to detect whether the power supply device is out of power.

As described above, in a conventional elevator, a separate electrostatic detection circuit is used to detect the cause of the microcomputer installed in the operation control panel, regardless of the main power supply, so that the cost increases and the production process becomes complicated. There was this.

Accordingly, an object of the present invention is to provide a fault detection method of an elevator for detecting a down cause of a microcomputer not related to main power failure by using a flag check of a microcomputer without using a separate power failure detection circuit.

1 is a block diagram of a failure detection apparatus for an elevator according to the present invention.

2 is a signal flow diagram of a fault detection method of an elevator according to the present invention;

*** Description of the symbols for the main parts of the drawings ***

1: Main power supply unit 2: Power failure monitoring unit

3: power supply 4: operation control panel

4A: microcomputer down detector 4B: RAM for backup

4C: normal signal backup unit 4D: interface unit

5: output unit

An elevator failure detection method for achieving the object of the present invention is a first step of resetting the normal power flag when the interrupt signal from the main power failure is input in the state that the operation control panel is operating normally, and stores the operation information at that time Wow; A second step of increasing the error count value recorded at a predetermined address of a backup RAM and storing an error occurrence time if it is determined that the normal power supply flag is set during restoration; The third step of displaying or printing the failure history of the operation control panel on the screen.

1 is a block diagram of an elevator showing an embodiment of a failure detection apparatus according to the present invention, as shown therein, an input power source A main power supply unit 1 which receives the power supply and converts the voltage into a voltage level required by each system unit; A power failure monitoring unit 2 for monitoring the power failure of the main power supply unit 1 and outputting an interrupt signal according thereto; A power supply 3 receiving input power through the main power supply 1 and supplying driving voltages for each level required by the operation control panel 4; In addition, it performs unique operation control function according to hall call registration or car call registration, resets the normal power supply flag when the interrupt signal is input, and analyzes the cause of failure based on the flag when recovering. An operation control panel 4 for recording and managing the normal operation time, the error occurrence time and the number of times; The output control unit 5 displays or prints a failure history of the operation control panel 4 on the screen.

The operation control panel 4 checks the normal power flag FLAG at the beginning of the system operation to determine whether the microcomputer that has occurred previously is caused by the power failure of the main power supply 1 or by the power failure of the power supply 3. A microcomputer down detector 4A for judging; A backup RAM 4B for storing a normal operation time, an error occurrence time, and a frequency of the microcomputer according to the failure detection of the microcomputer down detection unit 4A; A normal signal backup unit 4C for storing various driving information when the normal power flag FLAG is reset by a power failure; An interface unit 4D for outputting failure history information recorded in the backup RAM 4B to the outside; It consists of the normal power supply flag FLAG reset by the interrupt signal INT input from the power failure monitoring unit 2.

When described in detail with reference to Figure 2 attached to the operation of the present invention configured as described above are as follows.

Input power By the transformer of this main power supply part 1, it is converted into the voltage level required by each system part. In addition, the power supply 3 receives a predetermined level of power (110V / 220V) through the main power supply unit 1 and supplies driving voltages (5V / 15V / 24V) of each level required by the operation control panel 4. Among them, 5V of power is supplied to the microcomputer of the operation control panel 4.

The operation control panel 4 receives the driving power from the power supply 3 to perform an operation control function. In other words, when a call by a waiting passenger at a platform on each floor or a call by a passenger in a car is registered, the safe operation of each part of the system in the microcomputer of the driving control panel 4 to service the car on the floor. After checking whether or not, it performs various calculation functions to control the driving distance and speed.

In addition, the corresponding call button of the car or platform is turned on by the call registration signal transmitted from the driving control panel 4, and the driving information such as driving direction, car position indication information, etc. is transmitted to the platform indicator and displayed. The waiting passengers can recognize that the platform call requested by the passenger is registered, and can also recognize the current operating status of the elevator.

In this manner, when the operation control panel 4 operates normally, the microcomputer of the operation control panel 4 updates and records the normal operation time at a predetermined cycle at a predetermined address of the backup RAM 4B.

Meanwhile, the power failure monitoring unit 2 monitors whether the main power supply 1 is out of power and outputs an interrupt signal INT to the operation control panel 4 when a power failure occurs, and at this time, the operation control panel 4 In the microcomputer, the normal power flag FLAG is reset. In addition, the microcomputer stores various driving information required for normal operation at the time of normal return, for example, current position information and direction, etc. in the normal signal backup unit 4C.

However, when the interruption signal INT is not output from the power failure monitoring unit 2 because no power failure occurs in the main power supply unit 1, the operation control panel 4 may be disconnected due to a power failure of the power supply 3. When the microcomputer is down, the normal power flag FLAG remains set.

Therefore, the microcomputer down detection unit 4A checks the normal power supply flag FLAG at the initial (recovery) time of driving of the system, and determines whether the microcomputer previously generated is caused by a power failure of the main power supply unit 1. It is possible to determine whether the power supply 3 is caused by a power failure.

That is, if the microcomputer down detection unit 4A is reset by checking the normal power supply flag FLAG in the initial state of driving the system, it is determined that the microcomputer is down by the power failure of the main power supply unit 1, and the normal power supply is reset. After the flag FLAG is set, a normal control function is performed.

However, if the normal power flag FLAG is set as a result of the above check, it is determined that the microcomputer is down due to the power failure of the power supply 3 in the state where the power failure of the main power supply 1 does not occur. At this time, the microcomputer increments an error count value recorded at a predetermined address of the backup RAM 4B and stores an error occurrence time.

Therefore, the manager can grasp the failure history of the operation control panel 4 in detail through the output unit (5). That is, when the administrator inputs a failure history output command to the operation control panel 4 through the key input device, the normal operation time of the microcomputer of the operation control panel 4 stored in the backup RAM 4B, Since the error occurrence time and the number of times are displayed or printed on the output unit 5 through the interface unit 4D, the administrator can see the details of the output and can grasp the failure history of the microcomputer mounted on the operation control panel 4 in detail. .

As described in detail above, the present invention is based on the normal control flag for checking the power failure of the main power supply without separately using a power failure detection circuit for detecting the power failure of the power supply for supplying the driving power to the operation control panel. By determining whether the microcomputer is down due to the power failure of the main power supply or the power supply power failure, and recording and managing the normal operation time, error occurrence time and frequency of the microcomputer according to the power failure, and outputting the failure history to the outside if necessary. It is possible to understand the microcomputer's failure history in detail without adding extra cost.

Claims (4)

A first step of resetting the normal power flag and storing the driving information at the time when the interrupt signal due to the main power failure is input in the state where the operation control panel is normally operated; If the normal power flag is set at the time of restoration, it is determined that the microcomputer of the operation control panel is down irrespective of the main power, thereby increasing the error count value recorded at a predetermined address of the backup RAM and storing the error occurrence time. Elevator failure detection method comprising a. A power failure monitoring unit 2 for monitoring the power failure of the main power supply unit 1 installed in the elevator and outputting an interrupt signal according thereto; A power supply 3 for supplying a driving voltage of each level required by the operation control panel 4; When the interrupt signal is input, the operation control panel for resetting the internal normal power flag and analyzing the cause of the failure based on the flag at the time of restoration and recording and managing the normal operation time, error occurrence time and frequency of the internal microcomputer (4). Elevator failure detection device comprising a). The elevator failure detection apparatus according to claim 2, further comprising an output unit (5) for displaying or printing a failure history of the operation control panel (4) on a screen. 3. The driving control panel (4) according to claim 2, wherein the operation control panel (4) checks the normal power flag at the time of power recovery, so that the downtime of the microcomputer previously generated is caused by a power failure of the main power supply unit (1). A microcomputer down detector 4A for judging whether or not it is; A backup RAM 4B for storing a normal operation time, an error occurrence time, and a frequency of the microcomputer according to the failure detection of the microcomputer down detection unit 4A; A normal signal backup unit 4C for storing various operation information when the normal power flag is reset by a power failure; Elevator failure detection device, characterized in that consisting of an interface unit (4D) for outputting the failure history information recorded in the backup RAM (4B) to the outside.