CN103010889A - Detection and alarming device of abnormal opening of hoistway door and realization method - Google Patents

Abstract

The invention relates to the technical field of elevators, and discloses a detection and alarm device for abnormal opening of elevator hall doors, including a power supply, a control unit, a first switch and a second switch arranged on each floor, and alarms arranged on each floor. The first switch and the second switch on the floor are connected in parallel to form n parallel circuits, and the n parallel circuits form a series circuit. The control unit includes a potential detection circuit and a high potential output circuit. When the potential detection circuit detects that the nth input terminal is low potential, the high potential output circuit inputs high potential to the nth parallel circuit, and supplies power to the alarm on the nth floor to make the alarm alarm. The invention also discloses a method for realizing the detection and alarm device, which can effectively detect all abnormally opened hall doors, and issue effective alarm measures, and can still effectively respond to abnormal movement halls when the elevator main control board has floor recognition errors. Door detection and alarm.

Description

Detection and alarm device for abnormal opening of elevator hall door and its realization method

technical field

The invention relates to the technical field of elevators, in particular to a detection and alarm device for abnormal opening of elevator hall doors and a realization method.

Background technique

As a special transportation equipment, vertically running elevators are closely related to the safety of passengers. The national standards of my country and the elevator safety regulations of various countries clearly require that the elevator car door and hall door locks be connected into the safety circuit to avoid shearing hazards. However, in recent years, there have been a large number of accidents in which people accidentally fell into the hoistway by opening the hall door, causing tragedies of personal injury to continue to occur. For this reason, there are many detection, alarm and prompting technologies for the accidental opening of hall doors in non-leveling areas in the elevator industry.

For example, the Chinese patent "Detection device for abnormal opening of elevator hall door" (Patent No.: 01217409.2) discloses a safety detection device. This device is based on the patent "Detection device and detection method when the door of the non-elevator car is opened" (application number: 00112131.6), and a three-lead magnetic control switch CKZ is added at the position of the door pocket to realize the detection of all elevators. The judgment of the floor position where the hall door is opened, so as to send an alarm on this floor. The way to realize it is to use two magnetic switches on the hall door and in the shaft to connect in parallel. When the elevator is on the floor, CK is closed, and the switch CKZ is shorted, and no alarm is issued; when the elevator is not on the floor, CK and If the CKZ is disconnected and the lead wire of CKZ also has an output, it can be determined that the elevator is not at the floor and the landing door is opened abnormally, and the alarm device at the floor will act to remind people not to approach. But it has the following problems: 1) Although the magnetic switch and the permanent magnet can operate within a certain recognition range, but only one switch is installed on each floor of the hoistway, and the installation position is fixed, for the elevator with the function of opening the door in advance, The switch of the hoistway may not be closed yet, but the hall door has been opened, resulting in a false alarm; when the elevator has the re-leveling function, the elevator hall door is opened, and the car will move due to passengers entering and leaving, and the actions of the two magnetic switches are inconsistent. The possibility is very high, so this method is not reliable in practice. 2) The device cannot record the information about the abnormal opening of the hall door. When the accidental door opening recovers, the alarm disappears, and it cannot communicate with the elevator control system. Potential safety hazards may still exist, which is not conducive to maintenance personnel's troubleshooting.

Another example is the Chinese patent "Safety Detection Device and Detection Method for Elevator Landing Hall Doors" (public number: CN101264839A) which discloses a device for detecting abnormal opening of landing doors. The landing signal processing device of the signal uses the mechanical switch installed at the landing door to detect whether the landing door is open, and transmits the open landing door status signal to the elevator controller in the form of serial communication. The exclusive program in the elevator controller compares the door-opening landing signal with the position of the elevator car or related information, and finds out whether the car is not parked at the landing, but the landing door is opened abnormally, which can effectively improve the safety of the elevator , using the elevator's own door area identification signal, it avoids the identification delay and false alarm that are easily caused by two sets of pure mechanical switches when opening the door in advance or re-leveling. This method has the following disadvantages: 1) It completely depends on the elevator controller to obtain the position of the car and make judgments. When the elevator is powered off and slides, the floor in the elevator controller often does not match the actual floor. , the device has great potential safety hazards; 2) When the elevator is powered off or overhauled, the device will not be able to function, and at this time the hall door is very likely to be opened artificially, and accidents are extremely prone to occur; 3) This invention does not describe the specific alarm method after judging that the hall door is abnormally opened, but only records it inside the elevator, which cannot serve as a warning to people not to approach the hall door; 4) This invention requires at least one CPU, The landing signal processing device composed of serial communication controller and so on will greatly increase the cost.

Another example is the Chinese patent "Intelligent Alarm System for Abnormal Opening of Elevator Hall Door and Its Safety Detection Method" (Application Publication No.: CN102085990 A) which discloses a new detection and alarm method for abnormal opening of hall door. , car infrared sensor and external output processing circuit, central processing unit, floor address decoding circuit, radio frequency transmitting circuit, serial communication interface circuit and alarm driving circuit. The implementation method is that the hall door infrared sensor detects whether the elevator hall door is open, and the car infrared sensor detects whether the car is on this floor. The circuit or serial circuit sends a signal and drives the alarm circuit, which can realize timely alarm and output the signal of the floor when the hall door is opened abnormally. The invention also has the following disadvantages: 1) The patent requires that hall door infrared sensors and car identification sensors be installed on each floor, which is costly and difficult to install and debug; 2) long-term use of infrared sensors shows that they are vulnerable to Visible light interference, especially the infrared sensor outside the hall door. The patent does not describe the location of the infrared sensor. If you want to identify the opening of the hall door, you will inevitably be blocked by the sensor when passengers enter and exit; the car infrared sensor is installed in the shaft to identify The position of the car is also easily covered by shaft dust, and this method is prone to misjudgment; 3) When the elevator re-levels and opens the door in advance, the device cannot avoid the problem of inconsistent actions of the two infrared sensors, which is prone to false alarms.

Contents of the invention

In order to solve the above technical problems, the first object of the present invention is to provide a detection and alarm device for abnormal opening of elevator hall doors, through which the device can judge whether the elevator hall doors are abnormally opened, so as to ensure the safety of the elevator.

The second object of the present invention is to provide a detection and alarm implementation method for the abnormal opening of the elevator hall door, through which the detection and alarm of the elevator can be realized.

In order to realize the first purpose, the technical scheme that the present invention takes is:

A detection and alarm device for abnormal opening of elevator hall doors is characterized in that it includes a power supply, a control unit, a first switch and a second switch arranged on each floor, and an alarm installed on each floor, defining the floor from top to bottom or From bottom to top are the 1st floor, the 2nd floor..., the nth floor, the first switch of each floor is closed when the hall door of this floor is completely closed, and is disconnected when the hall door of this floor is not completely closed, The second switch of each floor is closed when the car is at the leveling position of the floor, and is disconnected when the car leaves the leveling position of the floor, and the first switch and the second switch of each floor are connected in parallel to form n parallel circuits , the first end of the nth parallel circuit is set to a high potential, the second end of the nth parallel circuit is connected to the first end of the n-1th parallel circuit, and the second end of the n-1th parallel circuit is connected to the second end of the nth parallel circuit The first ends of n-2 parallel circuits are pushed successively until the second end of the second parallel circuit is connected to the first end of the first parallel circuit to form a series circuit, and the second ends of each parallel circuit are electrically connected to The n input terminals of the control unit, the control unit includes a potential detection circuit and a high potential output circuit, the potential detection circuit detects the potential of the nth input terminal, when the nth input terminal is a low potential, the The high potential output circuit inputs a high potential to the second end of the nth parallel circuit, and supplies power to the alarm on the nth floor to make the alarm alarm, and the potential detection circuit detects the n-1th floor in the same way. The potential of the first input up to the first parallel circuit.

Further, the control unit includes an elevator main control board, the elevator main control board recognizes the floor information of the car, the potential detection circuit detects the potential of the nth input terminal, when the nth input terminal is low potential and the car When the position of the car is not on the nth floor, the high potential output circuit inputs a high potential to the second end of the nth parallel circuit, and inputs a high potential to the alarm on the nth floor to make the alarm Alarm, when the nth input end has a low potential and the car is on the nth floor and there is an early door opening signal or a micro-level signal on the nth floor, the high potential output circuit will send to the nth parallel circuit The second terminal inputs a high potential, and inputs a low potential to the alarm on the nth floor, and the potential detection circuit detects the potential of the n-1th input terminal until the first parallel circuit in the same way.

Further, the first switch is a touch switch arranged at the hall door, and the second switch is a magnetic switch installed at the sill of the hall door on each floor and corresponding to the hall door on the car sill. A permanent magnet mounted on the magnetic switch mounted on the cam.

Further, the power supply of the detection and alarm device is composed of a rechargeable battery and an external AC power supply. When there is an external AC power supply, it is powered by the external AC power supply, and the AC power supply charges the rechargeable battery. When there is no external AC power supply, it is powered by Powered by rechargeable batteries.

Further, the alarm is a buzzer and/or a warning light.

Further, the high potential is 24V, and the low potential is 0V.

In order to realize the second purpose, the technical scheme that the present invention takes is:

A detection and alarm implementation method of the detection and alarm device for the abnormal opening of the elevator hall door is characterized in that it includes the following steps:

Step 1: Determine whether the hall door on the nth floor is abnormally opened, if so, go to step 2, otherwise go to step 7;

Step 2: Determine whether the elevator has a normal working signal, if yes, go to step 3, if not, go to step 6;

Step 3: Determine whether the floor where the door is abnormally opened is consistent with the floor identified by the elevator main control board, if so, go to step 4, otherwise go to step 6;

Step 4: Check whether there is an early door opening or micro leveling signal, if there is, go to step 5, if not, go to step 6;

Step 5: Make the second end of the parallel circuit on this floor a high potential, and input a low potential to the alarm on this floor;

Step 6: Make the second end of the parallel circuit on this floor a high potential, and input a high potential to the alarm on this floor;

Step 7: Subtract 1 from the value of the number of floors n, and repeat the above steps until the judgment of the first floor is completed;

Step 8: Reset the detection and alarm device so that all points in the series circuit and the alarms on each floor are at low potential, and repeat the above steps.

Further, the sixth step includes shielding the next detection of the floor, and transmitting the fault code of the floor to the elevator main control board.

Further, the main control board of the elevator keeps a high potential for the alarm, so that the alarm continues to alarm, and the duration is realized by a timer.

Further, the timing time of the timer is 30S.

Further, the high potential is 24V, and the low potential is 0V.

The beneficial effects of the present invention are:

1. Effectively detect all hall doors that are abnormally opened, and issue effective alarm measures. When the elevator main control board has a floor recognition error, it can still effectively detect and alarm abnormal hall doors. When the elevator is in the state of inching leveling or door opening in advance, the magnetic switch may not be effectively closed, and the device will make corresponding judgments without false alarms.

2. When a fault occurs, the fault information can be transmitted to the main control board of the elevator, so that the main control board of the elevator can display the corresponding fault code, which is convenient for the debugging and maintenance personnel to check the faulty floor.

3. The detection and alarm function can still be maintained in the power failure state, and the fault information can be recorded, and the fault information will be sent to the elevator main control board after the elevator power supply is restored.

Description of drawings

Accompanying drawing 1 is the circuit module schematic diagram of the present invention;

Accompanying drawing 2 is method flowchart of the present invention;

Accompanying drawing 3 is the flow chart of timing interrupt self-test.

The labels in the figure are:

J1...Jn. The first switch; G1...Gn. second switch;

a1...an. The second terminal of the parallel circuit; BJ1...BJn. Alarm system;

I(1)...I(n). Input port; O1(1) ...O1(n). outlet;

O2(1) ... O2(n). Output port; S01-S08. Flowchart steps.

Detailed ways

The specific implementation of the detection and alarm device for abnormal opening of the elevator hall door and the implementation method of the present invention will be described in detail below in conjunction with the accompanying drawings.

Referring to accompanying drawing 1, define the floor that installs elevator from top to bottom or from bottom to top respectively be the 1st floor, the 2nd floor,..., the nth floor, install the first switch J1...Jn at the hall door place of each floor , the first switch is a touch switch, the touch switch is controlled by the hall door, the touch switch is closed when the hall door is fully closed, and the touch switch is turned off when the hall door is not completely closed, that is, if the hall door is in the It is considered open when it is not completely closed. The second switch G1...Gn is installed at the hall door sill of each floor. The second switch is a magnetic switch installed at the hall door sill of each floor and a magnetic switch installed on the car sill corresponding to the hall door sill. The permanent magnet installed at the switch can effectively close the magnetic switch at the hall door sill when the elevator is leveling, and effectively open the magnetic switch when the elevator is in a non-leveling area. Alarms BJ1...BJn are also installed on each floor. The alarms are audible and visual alarms. Buzzers or light-emitting devices with warning colors and a combination of the two are optional. The device is controlled by a control unit installed in the elevator machine room. The control unit includes a CPU, main control board, serial communication circuit, IO interface circuit, etc. The IO interface circuit includes a 24V isolated input circuit and a 24V isolated output circuit, and an IO interface circuit. Send the signal from the elevator to the input terminal of the control unit. The first switch and the second switch on each floor are connected in parallel to form n parallel circuits. The first end of the nth parallel circuit is set to a high potential. Here, 24V positive voltage is applied to the first end of the nth parallel circuit. The second end an of the first parallel circuit is connected to the first end of the n-1th parallel circuit, and the second end an-1 of the n-1th parallel circuit is connected to the first end of the n-2th parallel circuit, and the sequence is accumulated Push until the second terminal a2 of the second parallel circuit is connected to the first terminal of the first parallel circuit to form a series circuit, and the second terminals a1...an of each parallel circuit are connected to the n inputs of the control unit through the IO interface circuit Terminals I(1)...I(n). The control unit includes an elevator main control board, and the elevator main control board recognizes the floor information of the car. The control unit also includes a potential detection circuit and a high potential output circuit. The potential detection circuit detects the potential of the nth input terminal. When the n input ends are low potential and the position of the car is not on the nth floor, the high potential output circuit inputs a high potential to the second end of the nth parallel circuit, and sends an alarm to the nth floor When the nth input end has a low potential and the position of the car is on the nth floor and there is an early door opening signal or a micro-level signal on the nth floor, the high potential output circuit Input a high potential to the second terminal of the nth parallel circuit, and input a low potential to the alarm on the nth floor, and the potential detection circuit detects the potential of the n-1th input terminal in the same way until the first parallel circuit.

The serial communication circuit can realize the communication between the CPU and the main control board of the elevator. The CPU periodically obtains the floor position signal of the elevator, the micro-leveling signal and the pre-opening signal. The information is sent to the elevator main control board through the serial port. This device is a power module composed of a rechargeable battery and an external AC power supply. The power supply module can be powered by an external power supply when there is an external power supply. At this time, the rechargeable battery is in a floating charge state. When there is no external power supply, Powered by batteries.

Referring to accompanying drawing 2, the realization method of detection alarm comprises the following steps:

Step 1: Determine whether the hall door on the nth floor is abnormally opened, that is, determine whether the input port I(n)=0V? (Step S01 in the accompanying drawing 2), if so, enter the second step, otherwise enter the seventh step.

Step 2: Determine whether the elevator has a normal working signal (step S02 in attached drawing 2), if yes, go to step 3, if not, go to step 6.

Step 3: Judging whether the floor where the door is abnormally opened is consistent with the floor identified by the elevator main control board (step S03 in attached drawing 2), if so, go to step 4, otherwise go to step 6.

Step 4: Check whether there is an early door opening or micro-leveling signal (step S04 in attached drawing 2), if there is, go to step 5, if not, go to step 6.

Step 5: Make the second end of the parallel circuit on this floor be a high potential, and input a low potential to the alarm on this floor (step S05 in Figure 2).

Step 6: Make the second end of the parallel circuit on this floor a high potential, input a high potential to the alarm on this floor, and at the same time shield the next detection of this floor, and pass the fault code of this floor to the elevator main control plate (step S06 in accompanying drawing 2).

Step 7: Decrease the value of the number of floors n by 1, and repeat the above steps until the judgment of the first floor is completed (step S07 in attached drawing 2).

Step 8: Reset the detection and alarm device so that each point of the series circuit and the alarms on each floor are at low potential, and repeat the above steps (step S08 in Figure 2).

When the alarm device is reset, the alarm signal on the alarm floor will be interrupted until the next round of alarm detection. Here, a timer is used to set a long enough time to make the detection alarm system continue to give the alarm a high potential, so that the alarm The device continues to alarm to make up for the gap during this period of time. It is advisable to set this duration to 30S.

The embodiment of the present invention will be described in detail below. The detection and alarm device for the abnormal opening of the elevator hall door of the present invention includes a touch switch installed at the hall door of each floor. The touch switch is controlled by the hall door. When the hall door is completely closed The touch switch is closed when the hall door is not fully closed, and the touch switch is turned off when the hall door is not fully closed; the magnetic switch installed at the sill of the hall door on each floor is connected in parallel with the touch switch installed at the hall door , the switch is in the off state when no permanent magnet is approaching, and is closed when the permanent magnet is approaching; the two ends of the magnetic switch and touch switch of a certain floor that have been connected in parallel are connected in series with the switches of other floors in this way through wires. At the same time, one end of the two switches on the top floor is powered by a DC power supply, and the other end is connected to the two parallel switches on the bottom floor. Install a permanent magnet at the position where the magnetic switch is installed on the sill of the elevator car corresponding to the sill of the hall door. The permanent magnet can effectively close the magnetic switch at the sill of the hall door when the elevator is leveling. The magnetic switch is effectively turned off when in the layer area. The detection and alarm circuit and device include a main control CPU, a serial communication module, and an IO interface circuit. The IO interface circuit includes a multi-port DC voltage (such as DC 24V) set of isolated input circuits and two sets of isolated output circuits. Each port of the input circuit corresponds to each group of parallel switches on each floor, and can collect corresponding The potential signal of the input port of the landing, let this floor be a floor, if the I (a) potential of the input port of the landing is 24V, then set the corresponding floor variable floor (a) to 0, if the I (a) potential is 0V, the corresponding floor variable floor (a) is set to the current floor value. The CPU periodically collects all input port signals, one set of output circuit O1(a) is connected to the input port I(a) of the corresponding landing, and the other set of output port O2(a) is connected to the alarm drive device; the output circuit ports are connected to each Floor locations are also in one-to-one correspondence, the output ports O1 and O2 are controlled by software to output 0V or 24V, and the other end of the alarm device driver is grounded. The serial communication module can realize the communication between the CPU and the main control board of the elevator. The CPU periodically obtains the elevator normal operation signal, the floor position signal, the micro-leveling signal and the pre-opening signal of the elevator, and the hall door is opened abnormally. , the CPU sends the corresponding fault information to the elevator main control board through the serial port. The driver of the alarm device installed on each floor, the alarm device can be a buzzer or a light-emitting device with a warning color or a combination of the two. A power supply module composed of a rechargeable battery and an external AC power supply. The power supply module can convert the AC voltage into a corresponding DC voltage, and when there is an external power supply, the external power supply is used to supply power, and the rechargeable battery is in a floating charge state; When the external power supply is cut off, the battery is used for power supply. The built-in memory of the device is used to record information such as the time when the hall door was opened abnormally, the floor of the floor and the number of times it was opened, so as to prevent the fault information from being kept when the elevator is powered off, and output when the elevator is powered on again. To the elevator controller, remind the maintenance personnel to reconfirm that the floor is safe, and then clear the alarm information through the manual reset button set on the elevator control cabinet or this device.

The method for detecting and alarming the abnormal opening of the elevator hall door of the present invention includes the following steps. First, detect whether there is an abnormally opened hall door on the top floor. The method is that if the input potential of I(n) is 24V (the voltage is an example value), then There is no abnormal hall door that is opened, and the input potential I(n-1) of the next floor is detected. If the input potential of I(n) is 0V, continue to detect whether the elevator has a normal working signal; if not, make the floor The output ports O1(n) and O2(n) of each output port output high level 24V, and shield the voltage detection of the input port of the floor, and record the fault code information of the floor, when the elevator has a normal working signal, turn it off The fault information is transmitted to the main control board of the elevator; if the elevator has a normal working signal, it will continue to detect and judge whether the current abnormal door opening floor is consistent with the floor obtained from the main control board of the elevator. And O2(n) output 24V high level, the alarm driver BJ(n) acts to realize the alarm prompt of this floor, and the software is set to not detect the corresponding input port voltage I(n) for the floor that has alarmed, and put The fault information of this floor is transmitted to the elevator main control board; then enter the detection of the input port potential I(n-1) of the next floor; if the detected current abnormal door opening floor is consistent with the obtained elevator main control board floor, continue to judge the elevator Whether the main control program has an early door opening signal or a micro-ping signal, if so, stop the output of O2(n), that is, disconnect the alarm driver, and O1(n) has an output of 24V voltage to provide power for the detection of the next layer, and When entering the input potential detection of the next floor, if there is no door opening signal or micro-ping signal in advance, the output ports O1(n) and O2(n) of this floor will both output high level 24V, and the voltage of the input port of this floor will be shielded Detect and transmit the fault code information of this floor to the elevator main control board. Use the same detection method to sequentially detect the input voltage of the next floor to the bottom floor, and start detection from the top floor again, so that the detection is cyclical. At the same time, a timing interrupt is also added to the detection method. The opening condition of the timing interrupt is to detect that both the output ports O1(n) and O2(n) have output 24V voltage, that is, it is detected that the hall door is abnormally opened. When responding to the interruption, make the voltage of all output ports O1 and O2 output 0V, restart the shielded input ports I(n), and start from the top floor to detect whether there is an abnormally opened hall door. When the hall door is abnormally opened and an alarm is issued, but when it is closed manually or automatically, the detection device can still accurately detect the floor.

If the building suddenly loses power or the elevator turns off the power supply, the elevator floor information cannot be detected, and it is judged that the elevator is in an abnormal state such as power failure. Same as above, without comparing with elevator normal working information, elevator floor information, inching or advance door opening information, to achieve the purpose that the device can be used independently without cooperating with the elevator control cabinet.

The present invention includes a detection and alarm circuit, which mainly includes a main control CPU, a serial communication module, and an IO interface circuit. The CPU collects the on-off state information of the switches on each floor through the I port, and refers to the functional flow method in Figures 2 and 3 to control the O1(n) and O2(n) output ports of the n floor where the hall door is opened to output 24V high power. To drive the alarm device to act, to send out light or sound alarm prompts, and at the same time generate the fault information of the corresponding floor, store it by itself, and then pass it to the elevator main control circuit board through the serial communication circuit, so that the digital display of the elevator main control board displays the fault information. There is a one-to-one correspondence between the input and output ports and the floor positions of the elevator, and there is an input port I and two output ports O1 and O2 at each floor station. The detection and alarm circuit can accurately judge the floor number when both the current parallel switches are disconnected according to the change of the data bit of the address corresponding to the input port. The CPU can periodically collect the existing information data of the main control board of the elevator through the serial communication circuit, including the landing data identified by the elevator, the elevator micro-movement leveling signal, and the elevator pre-opening door signal in advance.

The present invention also includes a power supply module composed of a rechargeable battery and an external AC power supply. The power supply module can be powered by an external power supply of 220V when there is an external power supply. At this time, the rechargeable battery is in a floating charge state. When the battery is used to provide 24V.

The device can periodically acquire the elevator floor number recognized by the elevator main control board, the micro-leveling signal and the door opening signal in advance. Assume that the elevator car is at the leveling position on the 3rd floor, and the hall door on the 3rd floor is opened, and the elevator is working normally. signal and micro-leveling signal, at this time only the touch switch J3 on the third floor is off, and the other touch switches and magnetic switches are all on, so the input voltage of all I ports is 24V, and the program judgment of this device is normal The hall door was opened, so no alarm was given.

Let’s take a specific example to illustrate, assuming that the elevator car is on the leveling floor of the 3rd floor, and the hall doors on the 3rd and 2nd floors are opened, and the elevator is working normally, and the elevator floor is not self-rescuing due to slides or other reasons There is a phenomenon of wrong floors, and the main control board of the elevator does not send out the door opening signal in advance and the micro leveling signal. At this time, the touch switch J3 on the 3rd floor, the touch switch J2 on the 2nd floor, and the magnetic switch G2 on the 2nd floor are all broken. On, the device first detects that the voltage of the I(2) port is 0V, according to Table 1:

The floor where the abnormal movement of the hall door can be found is the 2nd floor. Since the elevator works normally and there is no wrong floor, the program judges that the floor of the abnormal hall door is consistent with the floor recognized by the elevator control board, and the main control board does not send out the signal of opening the door in advance and the signal of micro-leveling. , so that the program controls the O1 (2) port to output a high level 24V to provide a detection reference voltage for the next floor. After O1 (2) has an output, the software internally shields the potential signal of the input port I (2) to keep the alarm drive output. O2 (2) outputs 24V to supply power to the alarm device BJ2 on the second floor. At the same time, start the timer (for example, 30s). At this time, only the second floor will emit light or sound alarm prompts, and only the hall on the second floor will appear. The fault information of abnormal door opening is sent to the main control board of the elevator to display the corresponding fault information. After detecting the voltage of the I(1) port on the first floor, the program will start from the top floor to judge whether there is a new abnormal opening of the hall door The floor appears, and for the floor where the alarm has occurred, the detection port is shielded, and the input voltage of the I port of this floor is not detected. When the timer stops, all output ports O1 (n), O2 (n) stop output, and then Detect the door status of each floor from the top floor to the bottom floor.

Assume that the elevator car is located on the leveling floor of the third floor, and the hall doors on the third, second, and first floors are all opened, that is, the hall doors on two floors are abnormally opened, and the elevator is working normally. Self-rescue or other causes of wrong floors, and the main control board of the elevator did not send out the signal of opening the door in advance and the signal of micro leveling. At this time, there are touch switch J3 on the third floor, touch switch J2 on the second floor, and magnetic The switch G2, the touch switch J1 on the 1st floor, and the magnetic switch G1 on the 1st floor are all off. The device first detects that the voltage at the I(2) port is 0V. According to Table 1, it can be obtained that the floor where the hall door moves abnormally is the 2nd floor. , because the elevator works normally, there is no wrong floor, and the main control board does not send out the door opening signal in advance and the micro leveling signal, so the program controls the O1 (2) port to output a high level 24V to provide a detection reference voltage for the next floor, O2 ( 2) Supply power to the alarm equipment BJ2 on the second floor. Since the two switches J1 and G1 on the first floor are disconnected, the device detects that the voltage of the I(1) port is 0V, and the abnormal movement of the hall door can be obtained according to Table 1. The floor is the 1st floor, since the elevator does not have a wrong floor, and the main control board does not send out the door opening signal in advance and the micro-leveling signal, so the device program controls the O2 (1) port to output a high-level 24V alarm to the first floor Drive BJ1 supplies power, and sends the fault information that the hall door is abnormally opened on the 2nd floor and the 1st floor to the elevator main control board to display the corresponding fault information. Since the first floor is the last floor detected by the device, the program will start from the top floor to re-judge whether there is a new floor where the hall door is abnormally opened, and for the floor where the alarm has occurred, the I port input voltage of this floor will not be detected. . As above, when the O1 (2) and O2 (2) outputs are started, the timer starts, and when the timer triggers an interrupt, all output ports O1 (n) and O2 (n) stop outputting, and again detect each output from the top layer to the bottom layer. Floor door status.

Assume that the elevator car is on the leveling floor of the third floor, and the hall doors on the third floor are opened, and the elevator is working normally. Door opening signal and micro leveling signal, the magnetic switch on the 3rd floor can be effectively closed only after the elevator stops leveling. disconnected, although the device detects that the input voltage of port I(3) is 0V, but the software makes O1(3) output 24V to provide a detection reference voltage for the next floor, and O2(3) outputs 0V, at this time the 3rd floor will not Alarm, make O1 (3) output 0V after the early door opening signal or micro signal disappears. Then proceed to the inspection of the next floor. the

Assuming that the elevator has a wrong floor due to slide self-rescue or other reasons, that is, the elevator car is actually on the second floor, but the elevator floor recognized by the elevator main control board is on the third floor. When the hall door on the third floor is opened abnormally, this device recognizes that The voltage of port I(3) is 0V, and the program judges that the current abnormal door opening floor is inconsistent with the floor identified by the elevator main control board, then the device program will control O2(3) regardless of whether the elevator has an early door opening signal or a micro-leveling signal ) port outputs high level 24V to supply power to the alarm driver BJ3 on the third floor, and at the same time the output voltage of O1 (3) is used for the detection of the lower circuit, and sends the fault information of the abnormal opening of the hall door on the third floor to the main control board of the elevator to display the corresponding fault information.

Assuming that the car is not on the 2nd floor, the hall door on the 2nd floor is opened abnormally, and the device has effectively alarmed the 2nd floor, but due to the timely maintenance by the maintenance and commissioning personnel, the hall door on the 2nd floor is effectively closed, which excludes this Fault, because the program part of this device has added a 30S timer interrupt self-test function when there is an abnormal situation in the hall door (see attached drawing 3, the time can be changed according to needs, here is an example), its function is when a fault occurs , this device closes all alarm outputs every 30S, restores the shielded floor detection port, and then checks again whether the hall door of this floor is still opened abnormally (of course, all floors are also being detected all the time, not affected by the timer) , that is, when it is detected that the hall door of a certain floor is abnormally opened, the alarm device on this floor will continue to alarm for at least 30 seconds, ensuring sufficient safety. If the hall door that breaks down is repaired normally, then will no longer give an alarm after the regular self-check occurs in the program.

If there is a power failure in the elevator or in the building, and the normal working signal of the elevator cannot be detected, the device can still work independently, continue to detect all abnormally opened hall doors, send an alarm signal on the corresponding floor and record the fault information in the memory of the device , after the normal power supply of the building is restored, the previously recorded fault information can be sent to the main control board of the elevator for display.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be considered Be the protection scope of the present invention.

Claims (11)

1. detection alarm device that hoistway door is opened unusually, it is characterized in that: comprise power supply, control unit, be arranged on the first switch and the second switch of each floor, be arranged on the annunciator of each floor, the definition floor is respectively the 1st floor from top to bottom or from top to bottom, the 2nd floor ... the n floor, closure when described first switch of each floor cuts out fully at this floor Room door, floor Room door is non-disconnects when closing fully at this, the described second switch of each floor is closed when car is positioned at this floor level position, when leaving this floor level position, car disconnects, form n circuit parallel after the first switch of each floor and the second switch parallel connection, the first end of n circuit parallel arranges a high potential, the second end of n circuit parallel connects the first end of n-1 circuit parallel, the second end of n-1 circuit parallel connects the first end of n-2 circuit parallel, tire out successively and push away, until connecting the first end of the 1st circuit parallel, the second end of the 2nd circuit parallel forms a circuit series, the second end of each circuit parallel is electrically connected to n input end of described control unit, described control unit comprises potential detecting circuit and high potential output circuit, described potential detecting circuit detects the current potential of n input end, when n input end is active potential, described high potential output circuit is given the second end input high potential of described n circuit parallel, and make described alarm equipment alarm for the annunciator power supply of n floor, the current potential of described potential detecting circuit n-1 input end of detection in the same manner is until the 1st circuit parallel.

2. the detection alarm device unusually opened of hoistway door according to claim 1, it is characterized in that: described control unit comprises elevator main control board, described elevator main control board identifies the floor information of car, described potential detecting circuit detects the current potential of n input end, when position that n input end is active potential and car during not at described n floor, described high potential output circuit is given the second end input high potential of described n circuit parallel, and make described alarm equipment alarm for the annunciator input high potential of n floor, when the position of n input end active potential and car is positioned at described n floor and n floor advance door opening signal or little flat signal is arranged, described high potential output circuit is given the second end input high potential of described n circuit parallel, and input active potential for the annunciator of n floor, the current potential of described potential detecting circuit n-1 input end of detection in the same manner is until the 1st circuit parallel.

3. the detection alarm device unusually opened of hoistway door according to claim 1, it is characterized in that: described the first switch is the touching switch that is arranged on door place, the described Room, and described second switch is to be installed in the magnetic switch at each floor lading door dill place and the permanent magnet that installs at the magnetic switch place of installing corresponding to lading door dill on car sill.

4. the detection alarm device that each described hoistway door is opened unusually in 3 according to claim 1, it is characterized in that: the power supply of described detection alarm device is for to be made of rechargeable battery and external AC power supply, when external AC power supply is arranged, powered by external AC power supply, source of AC is given described rechargeable battery charging, when not having external AC power supply, by rechargeable battery powered.

5. the detection alarm device that each described hoistway door is opened unusually in 3 according to claim 1, it is characterized in that: described annunciator is buzzer phone and/or warning light-emitting device.

6. the detection alarm device that each described hoistway door is opened unusually in 3 according to claim 1, it is characterized in that: described high potential is 24V, described active potential is 0V.

7. the detection alarm implementation method of a detection alarm device of unusually opening such as each described hoistway door in the claim 1 to 6 is characterized in that: comprise the steps:

The first step: whether the Room door of judging the n floor abnormal start-up, then enters in this way second step, as otherwise entered for the 7th step;

Second step: judge whether elevator has the normal operation signal, if any then entering for the 3rd step, then entered for the 6th step such as nothing;

The 3rd step: judge that the current floor that unusually opens the door is whether consistent with the floor that elevator main control board is identified, then entered for the 4th step in this way, as otherwise entered for the 6th step;

Whether the 4th step: detecting has advance door opening or fine motion flat bed signal, if any then entering for the 5th step, then enters for the 6th step such as nothing;

The 5th step: make this floor circuit parallel the second end for high potential, give the annunciator input active potential of this floor;

The 6th step: make this floor circuit parallel the second end for high potential, give the annunciator input high potential of this floor;

The 7th step: make the value of number of floor levels n subtract 1, repeat above-mentioned steps, until finish the judgement of the first floor;

The 8th step: the reset detection warning device, make the each point of circuit series and the annunciator of each floor be active potential, repeat above-mentioned steps.

8. detection alarm implementation method according to claim 7 is characterized in that: in described the 6th step, comprise the next detection to this floor of shielding, and the diagnostic code of this floor is passed to the step of elevator main control board.

9. detection alarm implementation method according to claim 8 is characterized in that: described elevator main control board continues high potential for described annunciator, makes described annunciator continue to report to the police, and described time length is regularly realized by timer.

10. detection alarm implementation method according to claim 8, it is characterized in that: the timing of described timer is 30S.

11. each described detection alarm implementation method in 10 according to claim 7, it is characterized in that: described high potential is 24V, and described active potential is 0V.

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