JP6828781B1 - Elevator anomaly monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abnormality monitoring system capable of accurately detecting an abnormality in an elevator safety device. An abnormality monitoring system is a governor pulley 21 or a tension that is rotated by a first detection device 3A that detects the amount of rotation of a hoisting machine 1 that winds up a main rope R1 that suspends a car K, and a governor rope R2 that is connected to the car K. It includes a second detection device 3B for detecting the amount of rotation of the pulley 22, a user detection device 3C, and a control device 4. The control device 4 includes a calculation processing unit, a generation processing unit, and a change processing unit. The calculation processing unit calculates the difference between the speed of the car K obtained from the amount of rotation detected by the first detection device 3A and the speed of the car K obtained from the amount of rotation detected by the second detection device 3B. .. The generation processing unit generates an abnormal signal when the difference calculated by the calculation processing unit exceeds the threshold value. The change processing unit determines the presence or absence of a user based on the detection result of the user detection device 3C, and changes the threshold value according to the presence or absence of the user. [Selection diagram] Fig. 1

Description

The present invention relates to a technique for monitoring an abnormality in an elevator.

Some elevators are equipped with the following safety devices in order to safely stop the car in the event of an abnormality (see, for example, Patent Document 1). In the electronic terminal floor speed reducer (hereinafter referred to as "electronic ETS device"), which is one of the safety devices, a governor pulley and a tension pulley are arranged at the upper and lower ends of the hoistway, and a governor rope is hung on them. It is hung, and the governor rope is connected to the car so as to go around as the car goes up and down. The governor pulley or tension pulley is provided with an encoder that detects the amount of rotation of those pulleys that rotate by the circumference of the governor rope, and the speed of the car is determined based on the amount of rotation detected by the encoder. Further, the electronic ETS device is provided with a position detecting means (switch, sensor, etc.) for detecting the position of the car when approaching the terminal floor. Then, when the speed of the car obtained at the time when the position of the car is detected by the position detecting means exceeds a predetermined speed (when the speed is overspeed), the electronic ETS device is used for riding. The car is urgently stopped by shutting off the power supply to the hoist that generates power to the car and operating the brake by cutting off the power supply to the brake control circuit.

Japanese Unexamined Patent Publication No. 2004-123279

The present inventors have proposed a technique for detecting an abnormality of an encoder included in an electronic ETS device in the above-mentioned elevator. Specifically, the difference between the speed of the car obtained based on the amount of rotation of the governor pulley or the tension pulley and the speed of the car obtained based on the amount of rotation of the hoist (for example, the amount of rotation of the rope wheel). When the difference exceeds the threshold value, it is determined that an abnormality has occurred in the encoder of the electronic ETS device, and the car is suspended.

However, the electronic ETS device is configured so that the governor pulley and the tension pulley rotate in conjunction with the movement of the car. On the other hand, the behavior of the user in the car is, for example, vibration and appears in the movement of the car, and the car is obtained based on the rotation amount of the governor pulley or tension pulley detected by the encoder, and by extension, the rotation amount. Affects the speed of. Therefore, even if there is no abnormality in the electronic ETS device, the above-mentioned speed difference increases by the amount affected by the user's behavior and exceeds the threshold value, and as a result, the user's behavior becomes electronic. There is a risk of erroneous detection as an abnormality in the ETS device.

In order to prevent such false detection, it is conceivable to increase the threshold value used for comparison with the difference in consideration of the influence of the user's behavior on the difference. However, if the threshold value is increased, the detection sensitivity becomes dull with respect to the change in the difference, and the accuracy of abnormality detection decreases.

Therefore, an object of the present invention is to provide an abnormality monitoring system capable of accurately detecting an abnormality in an elevator safety device.

In the elevator abnormality monitoring system according to the present invention, the first detection device that detects the amount of rotation of the hoist that winds up the main rope that suspends the car, and the rotation of the governor pulley or tension pulley that is rotated by the governor rope connected to the car. It includes a second detection device for detecting the amount, a user detection device for detecting a user in the car, and a control device. The control device includes a calculation processing unit, a generation processing unit, and a change processing unit. The calculation processing unit calculates the difference between the car speed obtained from the rotation amount detected by the first detection device and the car speed obtained from the rotation amount detected by the second detection device. The generation processing unit generates an abnormal signal when the difference calculated by the calculation processing unit exceeds the threshold value. The change processing unit determines the presence or absence of a user in the car based on the detection result of the user detection device, and changes the above threshold value according to the presence or absence of the user.

In the above abnormality monitoring system, when there is no user in the car, the behavior of the user does not affect the above difference. That is, the behavior of the user is not erroneously detected as an abnormality (including a sign of abnormality) of the safety device (a device composed of a governor pulley, a tension pulley, and a governor rope). Therefore, when there are no users in the car, by using a relatively small value as the threshold value, the above-mentioned abnormality monitoring system can judge whether or not an abnormality has occurred in the safety device based on a strict standard. It will be possible. This makes it possible to accurately detect an abnormality in the safety device.

On the other hand, in the above abnormality monitoring system, when there is a user in the car, the behavior of the user affects the difference. Therefore, if the threshold value is small, the behavior of the user causes an abnormality in the safety device (a sign of abnormality). (Including) is likely to be falsely detected. Therefore, when there is a user in the car, by using a relatively large value as the threshold value, the above-mentioned abnormality monitoring system determines whether or not an abnormality has occurred in the safety device based on a loose standard. Becomes possible. As a result, the behavior of the user is less likely to be erroneously detected as an abnormality of the safety device.

In the above-mentioned abnormality monitoring system, the abnormality signal may include a stop signal for stopping the operation of the car and a sign signal for notifying the sign of the abnormality without stopping the operation of the car. Then, the generation processing unit generates a stop signal when the difference becomes equal to or higher than the first threshold value, and generates a predictive signal when the difference is smaller than the first threshold value but equal to or higher than the second threshold value. May be good. In this case, the change processing unit may change the second threshold value depending on the presence or absence of the user. According to this configuration, by changing the second threshold value according to the presence or absence of the user, it becomes possible to accurately detect the sign of abnormality of the safety device. Further, by comparing the above difference with the first threshold value, it is determined whether or not an abnormality that needs to stop the operation of the car has occurred in the safety device. Therefore, it is possible to accurately detect such an urgent abnormality of the safety device.

In the above abnormality monitoring system, the change processing unit may calculate the number of users in the car based on the detection result of the user detection device, and change the second threshold value according to the number of the users. .. According to this configuration, even when the number of users in the car is large and large movements are likely to occur as a whole, the behavior of the users is less likely to be erroneously detected as a sign of an abnormality in the safety device. Further, even when the number of users in the car is small, the second threshold value is not set to an unnecessarily large value, and therefore, a criterion for detecting a sign of abnormality of the safety device (that is, a second threshold value). The threshold value) is not over-relaxed. Therefore, a decrease in the accuracy of abnormality detection is prevented.

In the above abnormality monitoring system, the change processing unit determines whether or not the user in the car includes a child based on the detection result of the user detection device, and the second threshold value depends on the presence or absence of the child. May be changed. According to this configuration, even when a child who moves more than an adult is in the car, the behavior of the child is less likely to be erroneously detected as a sign of an abnormality in the safety device. Also, even when no child is on board, the second threshold value is not set to an unnecessarily large value, and therefore, the standard for detecting a sign of abnormality in the safety device (that is, the value of the second threshold value) is set. It cannot be overly relaxed. Therefore, a decrease in the accuracy of abnormality detection is prevented.

The abnormality monitoring system may further include a vibration detection device that detects the vibration of the car. In this case, the generation processing unit determines whether or not the user is violent in the car based on the detection result of the vibration detection device, and if it is determined that the user is violent, the generation processing of the sign signal is invalidated. You may. According to this configuration, when a user is rampaging in the car, the behavior of such a user is prevented from being erroneously detected as a sign of abnormality of the safety device.

According to the present invention, it is possible to accurately detect an abnormality in the safety device.

It is a conceptual diagram which shows the whole structure of the elevator to which the abnormality monitoring system which concerns on embodiment is applied. It is a block diagram which showed the abnormality monitoring system which concerns on embodiment. It is a flowchart which showed the abnormality detection processing executed in the abnormality monitoring system which concerns on embodiment. It is a flowchart which showed an example of the abnormality detection processing executed in the abnormality monitoring system which concerns on the 1st modification. It is a flowchart which showed an example of the abnormality detection processing executed in the abnormality monitoring system which concerns on the 2nd modification. It is a block diagram which showed the abnormality monitoring system which concerns on the 3rd modification. It is a flowchart which showed an example of the abnormality detection processing executed in the abnormality monitoring system which concerns on 3rd modification.

[1] Overall configuration of the elevator FIG. 1 is a conceptual diagram showing the overall configuration of the elevator to which the abnormality monitoring system according to the embodiment is applied. The elevator includes a car K, a hoisting machine 1, a safety device 2, and a control device 4. Here, the control device 4 is, for example, a control panel that controls an elevator.

The hoisting machine 1 is a device for hoisting the main rope R1 for suspending the car K. Specifically, the hoisting machine 1 includes a sheave 11 and an electric motor 12 for rotating the sheave 11. A main rope R1 is hung on the sheave 11, and a car K and a balance weight W are connected to both ends of the main rope R1. Then, the sheave 11 is rotated by the power of the electric motor 12, so that the car K moves up and down in the hoistway in a state of being balanced with the balance weight W.

Further, the hoisting machine 1 is provided with a first detection device 3A. Here, the first detection device 3A is a sensor (for example, an encoder) that detects the amount of rotation of the hoisting machine 1. Specifically, the first detection device 3A is provided on the sheave 11 or the electric motor 12, and detects the amount of rotation of the sheave 11 or the electric motor 12 as the amount of rotation of the hoisting machine 1. Then, the control device 4 obtains the position and speed of the car K based on the rotation amount of the hoisting machine 1 detected by the first detection device 3A, and also obtains the obtained position and speed (calculated position P1 and calculated speed V1). By controlling the hoisting machine 1 based on the above, the ascending / descending operation of the car K is controlled.

On the other hand, when an abnormality such as slippage of the main rope R1 or failure of the first detection device 3A occurs in the hoisting machine 1, the amount of rotation detected by the first detection device 3A is the actual lifting operation of the car K. The value deviates from the corresponding value. In that case, the control of the car K by the control device 4 does not correspond to the actual ascending / descending operation, and there is a risk that the actual speed of the car K will exceed the predetermined speed Vt (overspeed). There is a risk of becoming). Therefore, the elevator of FIG. 1 is provided with a safety device 2 in case of such an abnormality of the hoisting machine 1.

The safety device 2 is a device that makes an emergency stop of the car K when an abnormality occurs in the actual speed of the car K, and is an electronic ETS device in the present embodiment. Specifically, the safety device 2 includes a governor pulley 21 and a tension pulley 22 arranged at the upper and lower ends of the hoistway, and a governor rope R2 hung on them. Further, the governor rope R2 is connected to the car K so as to orbit as the car K moves up and down. That is, the safety device 2 is configured so that the governor pulley 21 and the tension pulley 22 rotate in conjunction with the movement of the car K.

Further, the safety device 2 is provided with a second detection device 3B and an overspeed determination device 23. In the present embodiment, the second detection device 3B is a sensor (for example, an encoder) that detects the amount of rotation of the tension pulley 22, and is provided on the tension pulley 22. The second detection device 3B may be provided on the governor pulley 21 to detect the amount of rotation of the governor pulley 21. Then, the overspeed determination device 23 obtains the position and speed of the car K based on the amount of rotation of the tension pulley 22 (or governor pulley 21) detected by the second detection device 3B, and also obtains the obtained position and speed (calculation). The following control is performed based on the position P2 and the calculated speed V2).

The overspeed determination device 23 determines whether or not the calculated position P2 has reached the predetermined position Pt near the terminal floor, and if it determines that the calculated position P2 has reached (Yes), the calculated speed V2 at that time is set. It is determined whether or not the predetermined speed Vt is exceeded. Then, when the overspeed determination device 23 determines that "yes", the overspeed determination device 23 cuts off the energization of the hoisting machine 1 that generates power in the car K, and also a brake control circuit (not shown). The car K is urgently stopped by shutting off the power to the car and operating the brake. In addition, the overspeed determination device 23 detects that the car K has reached the predetermined position Pt instead of determining whether or not the calculated position P2 has reached the predetermined position Pt. A sensor or the like) may be provided to determine whether or not the car K has been detected by the position detecting means, and based on that determination, it may be determined whether or not the position of the car K has reached the predetermined position Pt. ..

However, such a safety device 2 may also have an abnormality such as slippage of the governor rope R2 or failure of the second detection device 3B. Then, when such an abnormality occurs, it becomes difficult to detect the overspeed of the car K. Therefore, in the present embodiment, the safety device 2 is monitored by the abnormality monitoring system, and the abnormality of the safety device 2 to be monitored is detected with high accuracy by using the difference dV between the calculated speed V1 and the calculated speed V2.

[2] Elevator Abnormality Monitoring System FIG. 2 is a block diagram showing an abnormality monitoring system according to an embodiment. As shown in FIG. 2, the abnormality monitoring system includes a first detection device 3A, a second detection device 3B, and a control device 4 among the elevators described above. In FIG. 2, the overspeed determination device 23 is included in the configuration of the abnormality monitoring system, but the abnormality monitoring system is not limited to this, and the abnormality monitoring system is configured without including the overspeed determination device 23. May be good. The same applies to FIG. 6 described later.

Further, in the elevator of FIG. 1, a user detection device 3C is provided in the car K, and the abnormality monitoring system of the present embodiment also includes the user detection device 3C. Here, the user detection device 3C is a device capable of detecting a user in the car K, and the user detection device 3C includes, for example, an image pickup device, a weight sensor, an optical sensor, and the like. Is done. In addition, in FIG. 1, an image pickup apparatus is illustrated as a user detection apparatus 3C.

Then, the control device 4 constituting the abnormality monitoring system executes the abnormality detection process for accurately detecting the abnormality of the safety device 2 to be monitored. Specifically, the control device 4 includes a calculation processing unit 41, a generation processing unit 42, and a change processing unit 43 as a configuration for realizing the abnormality detection process. These processing units may be configured by hardware by constructing a circuit in the control device 4, or cause a processing device such as a CPU (Central Processing Unit) or a microcomputer included in the control device 4 to execute a program. It may be composed of software. Then, such a program may be stored in a portable storage medium (for example, a flash memory), or may be stored in a server or the like for downloadability.

Hereinafter, the flow of the abnormality detection process and the process executed by each processing unit in the flow will be specifically described. Note that FIG. 3 is a flowchart showing the abnormality detection process.

The abnormality detection process is started, for example, when the elevator shifts from the standby state to the operating state. When the abnormality detection process is started, the control device 4 first determines whether or not the above-mentioned power cutoff is executed by the overspeed determination device 23 (step S10 in FIG. 3). Then, when the control device 4 determines in step S10 that "executed (Yes)", the control device 4 ends the abnormality detection process without executing the process from step S11.

On the other hand, when it is determined in step S10 that "not executed (No)", the calculation processing unit 41 determines the rotation amount of the hoisting machine 1 detected by the first detection device 3A. Using the speed (calculated speed V1) and the speed of the car K (calculated speed V2) obtained from the rotation amount of the tension pulley 22 (or governor pulley 21) detected by the second detection device 3B at that time, they are used. The difference dV is calculated (step S11 in FIG. 3). As an example, the difference dV is a value obtained by dV = (V2-V1). As another example, the difference dV is the absolute value of the difference between the calculated speed V1 and the calculated speed V2 (dV = | V2-V1 |). As the calculated speed V2, the one obtained by the overspeed determination device 23 may be used.

Next, the generation processing unit 42 determines whether or not the difference dV is equal to or greater than the first threshold value dt1 (step S12 in FIG. 3). Here, the first threshold value dt1 is a reference value used for comparison with the difference dV in step S12 in order to detect that an abnormality that needs to stop the operation of the car K has occurred in the safety device 2. .. Then, when the generation processing unit 42 determines in step S12 that "the first threshold value is dt1 or more (Yes)", the generation processing unit 42 generates a stop signal J1 (one of the abnormal signals) for stopping the operation of the car K. (Step S13 in FIG. 3). After that, the control device 4 ends the abnormality detection process. At this time, since the control device 4 can determine that an abnormality has occurred in the safety device 2 itself by the generation of the stop signal J1, the car K is suspended on the nearest floor by controlling the hoisting machine 1.

On the other hand, when it is determined in step S12 that "it is not equal to or greater than the first threshold value dt1 (No)", the safety device 2 does not have an abnormality enough to stop the operation of the car K based on the determination. Can be judged. However, even in that case, if there is a sign (predictive sign) of the abnormality in the safety device 2, it is preferable to detect the sign and take some measures.

Therefore, when it is determined in step S12 that "the first threshold value is not dt1 or more (No)", the change processing unit 43 first uses the car K based on the detection result of the user detection device 3C. It is determined whether or not there is a person (step S14 in FIG. 3). As an example, when the user detection device 3C includes an image pickup device, the change processing unit 43 performs image processing (process for extracting users) on the image data acquired by the image pickup device, and processes at that time. Whether or not there is a user can be determined based on the result. As another example, when the user detection device 3C includes a weight sensor, the change processing unit 43 determines whether or not there is a user based on the weight change of the car K obtained from the detection result of the weight sensor. it can.

Then, when the change processing unit 43 determines in step S14 that "there is no user", the change processing unit 43 selects the inspection mode value da as the second threshold value dt2 (step S15A: dt2 = da in FIG. 3), and steps. When it is determined in S14 that "there is a user", the relaxation mode value db is selected as the second threshold value dt2 (step S15B in FIG. 3: dt2 = db). That is, the change processing unit 43 changes the second threshold value dt2 according to the presence or absence of a user in the car K. Here, the second threshold value dt2 is a reference value used for comparison with the difference dV in step S16 described later in order to detect a sign (predictive sign) of the abnormality of the safety device 2. In the present embodiment, the inspection mode value da and the relaxation mode value db are preset as values that can be selected as the second threshold value dt2. The details of the inspection mode value da and the relaxation mode value db are as follows.

The inspection mode value da is a relatively small value (for example, 4 m / min) used as the second threshold value dt2 when the sign (predictor) of the abnormality of the safety device 2 is detected with high accuracy. Specifically, when there is no user in the car K, the behavior of the user does not affect the difference dV. That is, the behavior of the user is not erroneously detected as a sign of abnormality of the safety device 2. Therefore, when there is no user in the car K, the inspection mode value da is set in the car K in order to tighten the detection standard (that is, the value of the second threshold value dt2) and improve the detection accuracy. It is set small in advance on the assumption that it will be used as the second threshold value dt2 when there is no user. More specifically, the inspection mode value da is set to a value smaller than the difference dV value (average value or minimum value) that can occur due to the behavior of the user when the user is in the car K. .. The inspection mode value da may be determined in consideration of the specifications of the elevator (specifications that are easy to shake or specifications that are hard to shake).

The relaxation mode value db is a value used as the second threshold value dt2 when preventing the user's behavior from being erroneously detected as a sign (predictor) of an abnormality in the safety device 2, and is larger than the inspection mode value da and , A value smaller than the first threshold value dt1 (for example, 12 m / min) is set. Specifically, when there is a user in the car K, the behavior of the user affects the difference dV. Therefore, if the second threshold value dt2 is small, the behavior of the user is a sign of abnormality of the safety device 2. It becomes easy to be falsely detected. Therefore, when there is a user in the car K, the relaxation mode value db is set in the car K in order to relax the detection standard (that is, the value of the second threshold value dt2) and prevent erroneous detection. It is set large in advance on the assumption that it will be used as the second threshold value dt2 when there is a user. More specifically, the relaxation mode value db is set to a value larger than the difference dV value (mean value or maximum value) that can occur due to the behavior of the user when the user is in the car K. .. The relaxation mode value db may be determined in consideration of the specifications of the elevator (specifications that are easy to shake or specifications that are hard to shake).

After step S15A or S15B, the generation processing unit 42 determines whether or not the difference dV is equal to or greater than the second threshold value dt2 (step S16 in FIG. 3). Then, when the generation processing unit 42 determines in step S16 that "the second threshold value is dt2 or more (Yes)", the generation processing unit 42 notifies the sign of the abnormality of the safety device 2 without stopping the operation of the car K. J2 (one of the abnormal signals) is generated (step S17 in FIG. 3). In this case, the control device 4 transmits the generated sign signal J2 to an external remote monitoring center or the like. As a result, it becomes possible to notify the maintenance personnel that a sign (predictive sign) of an abnormality has occurred in the safety device 2.

After step S17, the control device 4 determines whether or not the abnormality detection process should be terminated (step S18 in FIG. 3). As an example, the control device 4 determines whether or not the elevator has transitioned from the operating state to the standby state, and if it can be determined that the elevator has transitioned, the abnormality detection process should be "terminated" based on the determination. to decide. Further, even when it is determined in step S16 that "the second threshold value is not dt2 or more (No)", the control device 4 executes step S18. Then, when the control device 4 determines in step S18 that it should be terminated (Yes), it terminates the abnormality detection process, and when it determines in step S18 that it should not be terminated (No). Re-executes the process from step S10.

According to such an abnormality detection process, it becomes possible to accurately detect an abnormality (including a sign of an abnormality) of the safety device 2. Specifically, it is as follows.

When there is no user in the car K, the behavior of the user does not affect the difference dV. That is, the behavior of the user is not erroneously detected as a sign of abnormality of the safety device 2. Therefore, in the above abnormality detection process, when there is no user in the car K, a relatively small value is used as the second threshold value dt2, so that whether or not a sign of abnormality has occurred in the safety device 2 is determined. Judged by strict standards. Therefore, the sign of abnormality of the safety device 2 is detected with high accuracy.

On the other hand, when there is a user in the car K, the behavior of the user affects the difference dV. Therefore, if the second threshold value dt2 is small, the behavior of the user is erroneously detected as a sign of abnormality of the safety device 2. It becomes easy to be done. Therefore, in the above abnormality detection process, when there is a user in the car K, a relatively large value is used as the second threshold value dt2, so that whether or not a sign of abnormality has occurred in the safety device 2 is determined. Judgment is based on loose criteria. Therefore, the behavior of the user is less likely to be erroneously detected as a sign of abnormality in the safety device 2.

Then, regardless of whether or not there is a user in the car K, by comparing the difference dV with the first threshold value dt1, whether or not an abnormality that requires the operation of the car K to be stopped has occurred in the safety device 2. Is judged. Therefore, such an urgent abnormality of the safety device 2 can be detected with high accuracy.

[3] Modification example [3-1] First modification example In the above-mentioned abnormality monitoring system, the change processing unit 43 calculates the number N of users in the car K based on the detection result of the user detection device 3C. Then, the second threshold value dt2 may be changed according to the number N of the users.

FIG. 4 is a flowchart showing an example of an abnormality detection process executed in the abnormality monitoring system according to the first modification. In the abnormality detection process of FIG. 4, the change processing unit 43 calculates the number of users N in the car K based on the detection result of the user detection device 3C before executing step S14 (FIG. 4). Step S140). As an example, when the user detection device 3C includes an image pickup device, the change processing unit 43 performs image processing (process for extracting users) on the image data acquired by the image pickup device, and processes at that time. The number of users N can be calculated based on the result. As another example, when the user detection device 3C includes a weight sensor, the change processing unit 43 determines the number of users N based on the weight change of the car K obtained from the detection result of the weight sensor. Can be calculated.

After step S140, the change processing unit 43 determines in step S14 whether the number N is "0", "1 or more, predetermined number Nt or less", or "more than predetermined number Nt". ..

Then, when the change processing unit 43 determines in step S14 that the number of persons is “0”, the change processing unit 43 selects the inspection mode value da as the second threshold value dt2 (step S15A: dt2 = da in FIG. 4). On the other hand, when the change processing unit 43 determines in step S14 that "one or more people, a predetermined number of people Nt or less", the change processing unit 43 selects the first relaxation mode value db1 as the second threshold value dt2 (step S15B1: in FIG. 4). dt2 = db1), when it is determined in step S14 that “the number of people is greater than Nt”, the second relaxation mode value db2 is selected as the second threshold value dt2 (step S15B2: dt2 = db2 in FIG. 4). Here, as the number of users N in the car K increases, large movements are likely to occur as a whole (that is, large vibrations are likely to occur in the car K). Therefore, as the number of users N in the car K increases, the influence of the user's behavior on the difference dV tends to increase. Therefore, in this modification, in order to further relax the detection reference (that is, the value of the second threshold value dt2) as the number of users N in the car K increases, the second relaxation mode value db2 is set to the first relaxation. The mode value is set to a value larger than db1.

According to such anomaly detection processing, the second threshold value dt2 is changed according to the number of users N in the car K, so that the number N of users in the car K is large and the movement is large as a whole. Is likely to occur, the behavior of the user is less likely to be erroneously detected as a sign of abnormality in the safety device 2. Further, even when the number N of users in the car K is small, the second threshold value dt2 is not set to an unnecessarily large value, and therefore, a reference for detecting a sign of abnormality of the safety device 2 ( That is, the value of the second threshold value dt2) is not too relaxed. Therefore, a decrease in the accuracy of abnormality detection is prevented.

[3-2] Second Modified Example In the above-mentioned abnormality monitoring system, the change processing unit 43 determines whether or not the user in the car K includes a child based on the detection result of the user detection device 3C. The second threshold value dt2 may be changed depending on the presence or absence of the child.

FIG. 5 is a flowchart showing an example of an abnormality detection process executed in the abnormality monitoring system according to the second modification. In the abnormality detection process of FIG. 5, when the change processing unit 43 determines that "there is a user" in step S14, the user detection device further determines whether or not the user includes a child. The judgment is made based on the detection result of 3C (step S141 in FIG. 5). As an example, when the user detection device 3C includes an image pickup device, the change processing unit 43 performs image processing (process for extracting users) on the image data acquired by the image pickup device, and processes at that time. The presence or absence of children can be determined based on the results. As another example, when a plurality of optical sensors (infrared sensors, etc.) are provided above and below the door stop end of the door provided in the car K, and the optical sensors are included in the user detection device 3C. When the user gets on the car K, the change processing unit 43 obtains the height of the user using the detection result of the optical sensor, and based on the obtained height, whether or not the user is a child. Can be judged.

Then, when the change processing unit 43 determines in step S141 that it is “not included (No)”, the change processing unit 43 selects the first relaxation mode value db1 as the second threshold value dt2 (step S15B1: dt2 in FIG. 5). = Db1), if it is determined in step S141 that it is "included (Yes)", the second relaxation mode value db2 is selected as the second threshold value dt2 (step S15B2: dt2 = db2 in FIG. 5). Here, a child is more likely to move in the car K and generate vibration than an adult. Therefore, the influence of the behavior of the child on the difference dV tends to be larger than that of the adult. Therefore, in this modification, in order to further relax the detection criterion (that is, the value of the second threshold value dt2) when the user includes a child, the second relaxation mode value db2 is the first relaxation mode value. It is set to a value larger than db1.

According to such anomaly detection processing, the second threshold value dt2 is changed according to the presence or absence of a child, so that even if a child who has a larger movement than an adult is in the car K, the behavior of the child is changed. Is less likely to be erroneously detected as a sign of abnormality in the safety device 2. Further, even when no child is on board, the second threshold value dt2 is not set to an unnecessarily large value, and therefore, a reference for detecting a sign of abnormality of the safety device 2 (that is, the second threshold value dt2). Value) is not overly relaxed. Therefore, a decrease in the accuracy of abnormality detection is prevented.

[3-3] Third Modified Example FIG. 6 is a block diagram showing an abnormality monitoring system according to the third modified example. As shown in FIG. 6, the abnormality monitoring system may further include a vibration detection device 3D that detects the vibration of the car K. In this case, the generation processing unit 42 determines whether or not the user is violent in the car K based on the detection result of the vibration detection device 3D, and if it is determined that the user is violent, the precursor signal J2 is generated. The process may be disabled.

FIG. 7 is a flowchart showing an example of an abnormality detection process executed in the abnormality monitoring system according to the third modification. In the abnormality detection process of FIG. 7, after step S15B, before the generation processing unit 42 executes step S16, whether or not the user is violent in the car K is determined by the detection result of the vibration detection device 3D. Judgment is made based on (step S160 in FIG. 7). Here, when the user is violent, a large vibration is generated in the car K, and the behavior of such a user has a great influence on the difference dV.

Therefore, the generation processing unit 42 executes the processing from step S16 (generation processing of the sign signal J2) only when it is determined in step S160 that "there is no rampage (No)", and in step S160, "rambling". If it is determined that "Yes", the generation processing of the sign signal J2 is invalidated. Specifically, when it is determined in step S160 that "it is rampaging (Yes)", step S18 is executed without going through step S16.

According to such an abnormality detection process, when a user is rampaging in the car K, the behavior of such a user is prevented from being erroneously detected as a sign of an abnormality in the safety device 2. Further, in the above abnormality detection process, if there is a user in the car K, the determination in step S160 is repeatedly executed. Therefore, in step S160, it is determined that "yes" and the sign signal J2 Even if the generation processing of is disabled, if the user does not rampage after that, it is determined in step S160 that "there is no rampage (No)", and as a result, the generation processing of the sign signal J2 is performed. It will be valid again.

[3-4] Other Modified Examples The abnormality detection processes described in each of the embodiments and the first to third modified examples may be executed in all or in combination.

In the above-mentioned abnormality monitoring system, after the sign signal J2 is once generated in step S17, only the processes of steps S10 to S12 are repeated without generating the sign signal J2 until the maintenance staff's inspection (reset) is completed. It may be something to do. Further, the above-mentioned abnormality monitoring system may generate only the stop signal J1 or the sign signal J2. Assuming that only the stop signal J1 is generated, the abnormality monitoring system changes the first threshold value dt1 according to the presence or absence of a user without providing the second threshold value dt2, and the difference dV becomes the first threshold value dt1 or more. In that case, the stop signal J1 may be generated.

Further, the above-mentioned abnormality monitoring system is not limited to an elevator equipped with an electronic ETS device, and may be applied to an elevator equipped with another safety device.

The description of the embodiments described above should be considered exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims, not by the above-described embodiment. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the claims.

1 Hoisting machine 2 Safety device 3A 1st detection device 3B 2nd detection device 3C User detection device 3D Vibration detection device 4 Control device K Riding car N Number of people W Balance weight 11 Sheave 12 Electric machine 21 Gavana pulley 22 Tension pulley 23 Over Speed determination device 41 Calculation processing unit 42 Generation processing unit 43 Change processing unit dV Difference da Inspection mode value db Relax mode value db1 First relaxation mode value db2 Second relaxation mode value dt1 First threshold dt2 Second threshold J1 Stop signal J2 Prediction Signal Nt Predetermined number of people P1, P2 Calculation position Pt Predetermined position R1 Main rope R2 Governor rope V1, V2 Calculated speed Vt Predetermined speed

Claims (4)

The first detector that detects the amount of rotation of the hoist that winds up the main rope that suspends the car, and
A second detection device that detects the amount of rotation of the governor pulley or tension pulley that is rotated by the governor rope connected to the car.
A user detection device that detects users in the car and
Control device and
With
The control device is
The difference between the speed of the car obtained from the amount of rotation detected by the first detection device and the speed of the car obtained from the amount of rotation detected by the second detection device are calculated. Calculation processing unit and
When the difference becomes the first threshold value or more, a stop signal for stopping the operation of the car is generated, and when the difference is smaller than the first threshold value but equal to or more than the second threshold value, the ride A generation processing unit that generates a sign signal to notify a sign of abnormality without stopping the operation of the car ,
A change processing unit that determines the presence or absence of the user in the car based on the detection result of the user detection device and changes the second threshold value according to the presence or absence of the user .
Elevator anomaly monitoring system, including. The change processing unit, based on a detection result of said user detection apparatus calculates the number of the user of the passenger in the car, it changes the second threshold according to the number of the user, according to claim 1 Elevator anomaly monitoring system described in. The change processing unit determines whether or not the user in the car includes a child based on the detection result of the user detection device, and sets the second threshold value according to the presence or absence of the child. The elevator abnormality monitoring system according to claim 1 or 2 , which is modified. Further equipped with a vibration detection device for detecting the vibration of the car,
The generation processing unit determines whether or not the user is violent in the car based on the detection result of the vibration detection device, and if it is determined that the user is violent, the generation processing of the sign signal is performed. The elevator abnormality monitoring system according to any one of claims 1 to 3 , which is invalidated.

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