CN108726299B - Method for monitoring elevator running position based on air pressure change - Google Patents
Method for monitoring elevator running position based on air pressure change Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 230000001133 acceleration Effects 0.000 claims abstract description 143
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
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- 238000001514 detection method Methods 0.000 claims description 7
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- 238000007599 discharging Methods 0.000 claims description 3
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0025—Devices monitoring the operating condition of the elevator system for maintenance or repair
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0037—Performance analysers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
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- Indicating And Signalling Devices For Elevators (AREA)
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Abstract
The invention discloses a method for monitoring the running position of an elevator based on air pressure change, which takes the atmospheric pressure at the bottom or the top of an elevator shaft as reference air pressure, sets an acceleration threshold value and a speed threshold value of an elevator car, detects the real-time air pressure of the elevator car in the up-and-down running process by utilizing an air pressure sensor, and calculates the up-and-down running height displacement according to the difference value of the current real-time air pressure and the reference air pressure; the acceleration sensor is used for detecting the acceleration of the elevator car in the up-and-down running process to calculate the acceleration variation and record the time variation required by the acceleration variation, then the current running speed and the acceleration of the elevator car are calculated, and then the acceleration is compared with the acceleration threshold and the running speed is compared with the speed threshold, so that the current floor height position and the current running state of the elevator car are judged. The method can quickly judge the position of the elevator when the elevator breaks down, ensures timely and accurate rescue, and also effectively judges the possible running state of the elevator.
Description
Technical Field
The invention belongs to the technical field of elevator real-time detection, and particularly relates to a method for monitoring an elevator running position based on air pressure change.
Background
Along with the popularization and application of elevators in high-rise buildings and the improvement of water quality of people's life, people have higher and higher requirements on the stability and comfort of the elevators when taking the elevators, and along with the frequent use of the elevators, the safe operation conditions of the elevators are more and more widely concerned by the society, so that the safety of people is not only related to the personal safety of people, but also the public transportation safety of the society is influenced. In the running process of the elevator, the elevator car is realized by controlling the speed and the position of a motor for driving a sling suspending the elevator car, at the moment, the speed and the displacement of the elevator car are measured according to the output of an encoder rotating along with a motor shaft, in addition, the processes of acceleration or deceleration are accompanied in the starting and braking processes of the motor, for this reason, in order to describe the judgment of the running position of the elevator more accurately, the prior art directly detects three parameters of acceleration, speed and displacement of the elevator and grasps the position of the elevator car by combining the detected reference position, obtains the position of the elevator car by the relation among the reference position, the acceleration, the speed and the displacement, and judges that the elevator car takes the distance of the final stopping floor or the bottommost end (or the top end) of a floor lifting channel (shaft) as the reference, therefore, the difficulty in obtaining the running track or position of the elevator is high, judgment errors often occur, and the judgment process is complex.
Disclosure of Invention
The invention aims to provide a method for monitoring the running position of an elevator based on air pressure change. In order to achieve the purpose, the invention adopts the following technical effects:
according to one aspect of the invention, the method for monitoring the running position of the elevator based on the air pressure change is provided, the atmospheric pressure at the bottom or the top of an elevator shaft is taken as the reference air pressure, an air pressure sensor and an acceleration sensor are arranged at the bottom end or the top end outside the elevator car, the acceleration threshold value and the speed threshold value of the elevator car are set, the real-time air pressure of the elevator car in the up-and-down running process is detected by the air pressure sensor, and the up-and-down running height displacement is calculated according to the difference value of the current real-time air pressure and the reference air pressure; the acceleration sensor is used for detecting the acceleration of the elevator car in the up-and-down running process, calculating the acceleration variation and recording the time variation required by the acceleration variation, calculating the current running speed and acceleration of the elevator car according to the height displacement, the acceleration variation and the time variation, and comparing the acceleration with the acceleration threshold and the running speed with the speed threshold, thereby judging the current floor height position and the current running state of the elevator car.
Preferably, if the current running speed of the elevator car is the constant-speed running speed, the time variation is a difference value between the starting time and the stopping detection time detected by the acceleration sensor, and the accurate running position of the elevator car is determined according to the starting time, the stopping detection time and the constant-speed running speed detected by the acceleration sensor.
Preferably, if the current running speed of the elevator car is in a uniform acceleration running state, the acceleration sensor detects that the acceleration of the elevator car in the vertical running process comprises the acceleration a in the vertical directionyAnd acceleration a in the horizontal directionxzThe elevator car acceleration threshold comprises an acceleration threshold a in the vertical direction01And acceleration threshold a in the horizontal direction02Judging the acceleration threshold a in the vertical direction01Acceleration a in the vertical directionyThe magnitude of (1), the acceleration a in the horizontal directionxzAcceleration threshold a in the horizontal direction02The current speed v and the movement distance s of the elevator are calculated according to the current acceleration of the elevator car, so that the current running state of the elevator car is judged.
Preferably, the steps of calculating the current speed and movement distance of the elevator car are as follows: and carrying out filtering processing, primary integral processing and secondary integral processing on the acceleration of the elevator car detected by the acceleration sensor in the up-and-down running process, and comparing the current real-time position of the elevator car obtained by secondary integral with the movement distance calculated by the air pressure height.
Preferably, if the current running speed of the elevator car is in a non-uniform acceleration running state, the acceleration sensor acquires the current non-uniform acceleration a of the elevator carnIf the acceleration value is larger than the acceleration threshold value of the elevator car, the elevator car can be judged to be in an abnormal operation state.
In a further preferable mode of the above scheme, the method for monitoring the operation of the elevator based on the air pressure change further includes setting a temperature threshold T0 in the elevator shaft, and detecting a temperature value T1 of the position of the elevator car under the condition of the running speed or the acceleration by setting a temperature sensor, wherein the temperature sensor is located outside the elevator car or in the elevator shaft, and when the temperature value T1 is greater than or less than the temperature threshold T0, the temperature in the elevator shaft is adjusted and the current real-time air pressure value is obtained again.
Further preferably, in the above aspect, the elevator car determines the operation mode of the elevator under the traveling speed condition.
Preferably, the elevator car judges whether the elevator is normally stopped or normally started under the condition of running acceleration.
In a further preferred embodiment of the present invention, the temperature adjustment of the inside of the elevator shaft includes an operation step of discharging air in the elevator shaft to the outside or sucking air from the outside into the elevator shaft during the operation of the elevator car.
In summary, due to the adoption of the technical scheme, the invention has the following technical effects:
(1) according to the invention, the air pressure value and the acceleration of the position of the elevator are obtained in real time, the position variation of the operation of the elevator is calculated according to the difference value between the real-time air pressure and the reference air pressure (the reference of the bottom or the top of the elevator), so that the position height of the elevator is obtained, the relative position height value of the elevator is further judged, and the position of the elevator is determined, so that the position of the elevator when the elevator breaks down is quickly judged, timely and accurate rescue is ensured, and the operation speed of the elevator is calculated through the acceleration and the position variation, so that the elevator is effectively judged to be possibly in a maintenance operation state;
(1) the invention carries out real-time detection and acquisition on the acceleration, carries out median filtering processing, respectively carries out primary integral calculation on the real-time speed and secondary integral calculation on the real-time position height, and then compares the real-time speed and the secondary integral calculation on the real-time position height with the movement distance calculated by the air pressure height.
Drawings
Fig. 1 is a graph of an elevator operation of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples of preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
As shown in fig. 1, according to an aspect of the present invention, there is provided a method for monitoring an elevator operation position based on air pressure change, wherein an air pressure value of a position where a car is located is continuously changed along with a lifting movement of the car, so that an air pressure average value of the position where the car is located is obtained by continuously detecting an air pressure of a current position in a car operation process, an air pressure at a top or a bottom of an elevator shaft is compared with an air pressure of the current position of the car to obtain a difference value of the air pressure change, a current height where the car is located is calculated according to the obtained air pressure difference value, and after the elevator stops in an emergency state, a floor where the elevator fails can be determined according to a change of operation acceleration and the air pressure value, and the specific determination method is as follows: using the atmospheric pressure at the bottom or top of the elevator shaft as reference pressure P0Setting air pressure sensor and acceleration sensor at bottom or top of elevator car, and setting acceleration threshold a of elevator car0And a velocity threshold v0And the real-time air pressure P of the elevator car in the up-down running process is detected by using an air pressure sensorSAnd passing the current real-time air pressure PSWith reference air pressure P0The height displacement amount Δ h of the vertical movement is calculated from the difference, and therefore, the height displacement amount Δ h is (P) according to the formula of the height and the air pressureS-P0) Rho g, rho is the air density, g is the acceleration of gravity, and the atmospheric pressure at the bottom of the elevator shaft is taken as the reference pressure P0When the difference value is larger, the elevator can be judged to climb upwards, and when the difference value approaches zero, the height is close to the bottom of the elevator shaft; detecting the acceleration a of the elevator car in the up-and-down running process by using an acceleration sensor, calculating the acceleration change delta a and the time change delta t required for recording the acceleration change delta a, calculating the current running speed and the current acceleration of the elevator car according to the height displacement delta h, the acceleration change delta a and the time change delta t, and then comparing the acceleration a with an acceleration threshold a0And the driving speed v and the speed threshold v0Comparing the current floor height position of the elevator carAnd the current operating state, as shown in fig. 1, the elevator is from t0Run to t1When (at Δ t)1In time), the speed variation Δ a ═ at1-at2Wherein a ist1Is t1Acceleration of the moment acquisition, at2Is t2The acceleration acquired at the moment, and therefore, according to Δ h ═ ν Δ t +1/2 × Δ a × Δ t2Calculating the driving speed v, and when the acceleration a is greater than the acceleration threshold a0And the driving speed v is greater than the speed threshold v0In time, the elevator can be judged to be possibly in an abnormal operation state; when the acceleration a is less than or equal to the acceleration threshold a0And the driving speed v is equal to the speed threshold v0In time, the elevator can be judged to be in a normal ascending or descending running state; within a plurality of continuous time variation, when the acceleration a is zero or far less than the acceleration threshold a0The running speed v is less than the speed threshold v0And in time, the elevator can be judged to be possibly in a maintenance running state.
As shown in fig. 1, when the elevator normally starts to stop running, the elevator starts to climb upwards or descend downwards from a standstill, and if the current running speed of the elevator car is in a uniform acceleration running state, the acceleration sensor detects that the acceleration a of the elevator car in the up-and-down running process includes the acceleration a in the vertical directionyAnd acceleration a in the horizontal directionxzSaid elevator car acceleration threshold a0Acceleration threshold a including vertical direction01And acceleration threshold a in the horizontal direction02Judging the acceleration threshold a in the vertical direction01Acceleration a in the vertical directionyThe magnitude of (1), the acceleration a in the horizontal directionxzAcceleration threshold a in the horizontal direction02The current speed v and the movement distance h of the elevator are calculated through the current acceleration of the elevator car so as to judge the current operation state of the elevator car, and the acceleration a in the horizontal direction is used when the elevator operates normallyxzTo zero, the steps of calculating the current speed and distance of movement of the elevator car are as follows: carrying out filtering processing, primary integral processing and secondary integral processing on the acceleration of the elevator car detected by the acceleration sensor in the process of up-down running, wherein the acceleration is subjected to the filtering processingThe acceleration sensor detects the vertical acceleration a every 1 mu syOnce, continuously collecting n times (for example, collecting 20 times), removing maximum value and minimum value, and calculating average acceleration ae(aeI.e. real-time acceleration) and then performing integration processing on the average acceleration calculated each time, so that the integration processing process is the current speed v of the elevatore1And (3) and satisfies the following conditions:
νe1＝ve0+ae1×0.001s+ae2×0.001s+……+aen×0.001s；
wherein, ae0，ae1，ae2，……，aenAverage acceleration v in the current acceleration sensor acquisition period during elevator operatione0Is the current velocity v before acquisitione0(initial velocity) determined by the acceleration acquired at the previous moment, t in FIG. 10The time of day.
The second integral processing is to carry out second integral on the current elevator speed v of each integral processing so as to obtain the current real-time position (height h) of the elevators) Namely, the following conditions are satisfied:
h＝νe0×0.001s+νe1×0.001s+νe2×0.001s+νe3×0.001s+…+νen×0.001s；
wherein, ve0，νe1，νe2，νe3,…νenThe average speed in the current acquisition period when the elevator runs,
therefore, when the elevator normally runs up and down, the movement distance h calculated by the air pressure height and the real-time height h calculated by the secondary integral processingsH should be satisfied when performing the comparisonsH, if hsAnd if the value is not equal to h, the operation state is an abnormal operation state, so that the occurrence of misjudgment and misjudgment is prevented.
As shown in fig. 1, if the current running speed of the elevator car is a constant running speed (t)1To t2Time of) the time variation amount is the start time t of the detection of the acceleration sensor1And a stop detection time t2The difference value of (2) is compared with the actual running time of a single floor of the elevator through the starting time, the stopping detection time, the total time of constant-speed running and the speed of constant-speed crawling or descending detected by the acceleration sensor, and finally the number of floors of the elevator running is judged so as to accurately judge the accurate running position of the elevator cage. If the current running speed of the elevator car is in the non-uniform acceleration running state t2To t3Time of day, and t3To t4At the moment, the acceleration sensor acquires the current uneven acceleration a of the elevator carnIf the acceleration value is larger than the acceleration threshold value of the elevator car, the elevator car can be judged to be in an abnormal operation state. When the elevator runs suddenly and is in overspeed, falls, artificial shaking, vibration, sudden stop and the like, the elevator generates acceleration instantaneously, and the acceleration anGreater than a threshold value for the acceleration of the elevator car, i.e. the acceleration a in the vertical directionyGreater than or equal to the acceleration threshold a in the vertical direction01And acceleration a in the horizontal directionxzGreater than or equal to the acceleration threshold a in the horizontal direction02And the instantaneous acceleration causes the elevator to run in an unsafe state, so that the reaction of running position, fault judgment, maintenance and personnel rescue of the elevator needs to be made in time, the position state of the elevator can be known in time, the fault of the elevator can be found and predicted in time, and the like, so that the riding safety of the elevator is improved, and the safety factor of the running of the elevator is further enhanced
In the invention, the monitoring of the running position of the elevator through the air pressure change also comprises setting a temperature threshold T0 (temperature range T01-T02) in the elevator shaft, and detecting a temperature value T1 of the position of the elevator car under the condition of running speed or acceleration (constant speed running or acceleration running) by arranging one or more temperature sensors, wherein the temperature sensors are positioned outside the elevator car or in the elevator shaft, when the temperature value T1 is greater than (greater than T02) or less than a temperature threshold T0 (less than T01), the temperature in the elevator shaft is adjusted and the current real-time air pressure value is obtained again, the temperature adjustment in the elevator shaft comprises an operation process of exhausting air in the elevator shaft to the outside or sucking air into the elevator shaft from the outside during the running of the elevator car, and the air is sucked into the shaft from the outside during the climbing process of the elevator, the air in the elevator shaft is exhausted in the descending process of the elevator, so that the pressure difference between the inside and the outside of the elevator car is reduced, the temperature change of the elevator shaft can be adjusted, the elevator is judged to be in an overhaul mode or a maintenance operation mode simultaneously under the condition of the running speed (normal constant-speed running) of the elevator car and the temperature adjustment process in the elevator shaft, and whether the elevator is normally stopped or normally started is judged simultaneously under the condition of the running acceleration (accelerated running) of the elevator car. In the actual operation of the elevator, the operation of the elevator in the elevator hoistway is closely related to the ambient temperature, the temperature change in the hoistway is large, and the large air pressure measurement error is brought because the heat output caused by the temperature change is large, so that measures must be taken to reduce or eliminate the influence caused by the temperature change. The calibration operation of the phenomenon that air pressure value measurement errors are caused by temperature changes is reduced by discharging air in a shaft to the outside or sucking air from the elevator shaft for temperature compensation, preset threshold values of the air pressure value measurement errors are used as calibration parameters in one-to-one correspondence under standard temperature and standard air pressure, the air pressure value is further determined, the air pressure value errors caused by temperature changes are compensated, and therefore the final accurate air pressure value (threshold value) is obtained.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (6)
1. A method for monitoring the running position of an elevator based on air pressure change is characterized in that: the method comprises the steps of taking the atmospheric pressure at the bottom or the top of an elevator shaft as reference atmospheric pressure, arranging an atmospheric pressure sensor and an acceleration sensor at the bottom or the top outside the elevator car, setting an acceleration threshold value and a speed threshold value of the elevator car, detecting the real-time atmospheric pressure of the elevator car in the up-and-down running process by using the atmospheric pressure sensor, and calculating the up-and-down running process according to the difference value of the current real-time atmospheric pressure and the reference atmospheric pressureA height displacement amount; the acceleration sensor is used for detecting the acceleration of the elevator car in the up-and-down running process, calculating the acceleration variation and recording the time variation required by the acceleration variation, calculating the current running speed and acceleration of the elevator car according to the height displacement, the acceleration variation and the time variation, and comparing the acceleration with an acceleration threshold and the running speed with a speed threshold so as to judge the current floor height position and the current running state of the elevator car; if the current running speed of the elevator car is the constant-speed running speed, the time variation is the difference value of the starting time and the stopping detection time detected by the acceleration sensor, and the accurate running position of the elevator car is judged according to the starting time, the stopping detection time and the constant-speed running speed detected by the acceleration sensor; if the current running speed of the elevator car is in a uniform acceleration running state, the acceleration sensor detects that the acceleration of the elevator car in the vertical running process comprises the acceleration a in the vertical directionyAnd acceleration a in the horizontal directionxzThe elevator car acceleration threshold comprises an acceleration threshold a in the vertical direction01And acceleration threshold a in the horizontal direction02Judging the acceleration threshold a in the vertical direction01Acceleration a in the vertical directionyThe magnitude of (1), the acceleration a in the horizontal directionxzAcceleration threshold a in the horizontal direction02The current speed v and the motion distance s of the elevator are calculated according to the current acceleration of the elevator car, so that the current running state of the elevator car is judged; the steps of calculating the current speed and movement distance of the elevator car are as follows: carrying out filtering processing, primary integral processing and secondary integral processing on the acceleration of the elevator car detected by the acceleration sensor in the up-and-down running process, and comparing the current real-time position of the elevator car obtained by secondary integral with the movement distance calculated by the air pressure height; the acceleration filtering processing includes that the acceleration sensor detects acceleration in the vertical direction once every 1 mu s, continuously collects the acceleration for n times, calculates average acceleration after removing the maximum value and the minimum value, and then performs integration processing on the average acceleration calculated each time; the second integral treatment is carried out for each timeAnd performing secondary integration on the current elevator speed subjected to the primary integration processing so as to obtain the current real-time position of the elevator.
2. The method of claim 1, wherein the step of monitoring the operating position of the elevator is based on a change in air pressure, and the step of: if the current running speed of the elevator car is in a non-uniform acceleration running state, the acceleration sensor acquires the current non-uniform acceleration a of the elevator carnIf the acceleration value is larger than the acceleration threshold value of the elevator car, the elevator car can be judged to be in an abnormal operation state.
3. The method of any one of claims 1 to 2, wherein the method comprises the steps of: the method is characterized by further comprising the step of setting a temperature threshold T0 in the elevator shaft, and detecting a temperature value T1 of the position of the elevator car under the condition of running speed or acceleration by arranging a temperature sensor, wherein the temperature sensor is located outside the elevator car or in the elevator shaft, and when the temperature value T1 is larger than or smaller than the temperature threshold T0, the temperature in the elevator shaft is adjusted, and the current real-time air pressure value is obtained again.
4. A method of monitoring an elevator operating position based on changes in air pressure according to claim 3, characterized in that: and the elevator car judges the running mode of the elevator under the condition of running speed.
5. A method of monitoring an elevator operating position based on changes in air pressure according to claim 3, characterized in that: and the elevator car judges whether the elevator is normally stopped or normally lifted under the condition of running acceleration.
6. A method of monitoring an elevator operating position based on changes in air pressure according to claim 3, characterized in that: the temperature adjustment in the elevator shaft includes an operation process of discharging air in the elevator shaft to the outside or sucking air from the outside into the elevator shaft during the operation of the elevator car.
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| CN201810647519.7A CN108726299B (en) | 2018-06-22 | 2018-06-22 | Method for monitoring elevator running position based on air pressure change |
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| CN201810647519.7A CN108726299B (en) | 2018-06-22 | 2018-06-22 | Method for monitoring elevator running position based on air pressure change |
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| JP2004142853A (en) * | 2002-10-22 | 2004-05-20 | Mitsubishi Electric Corp | Elevator device |
| JP4764697B2 (en) * | 2005-10-25 | 2011-09-07 | 株式会社日立製作所 | Car position detection system |
| CN106744120A (en) * | 2017-01-23 | 2017-05-31 | 大连奥远电子股份有限公司 | A system for collecting the distance and position of the elevator |
| CN206827845U (en) * | 2017-05-18 | 2018-01-02 | 广西烽火信息技术有限公司 | A kind of elevator real-time monitoring device |
| CN107055245A (en) * | 2017-05-18 | 2017-08-18 | 广西烽火信息技术有限公司 | A kind of elevator method of real-time and device |
| CN107720469B (en) * | 2017-08-18 | 2019-11-08 | 杭州岁丰信息技术有限公司 | Method and system for measuring elevator floor by temperature and air pressure sensor |
| CN107720467A (en) * | 2017-09-14 | 2018-02-23 | 江门市冠田智能科技有限公司 | Elevator locating method, device and storage medium |
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2018
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