Lifting height monitoring system and method
阅读说明：本技术 一种起升高度监测系统及方法 (Lifting height monitoring system and method ) 是由 龚文 金彦 杭杰 诸征 余杰 李传磊 蒋瑜 黄正球 李振林 汪敬东 刘恩频 于 2021-07-30 设计创作，主要内容包括：本发明涉及一种起升高度监测系统及方法,系统包括声波发射器、第一声波接收器和第二声波接收器,声波发射器设置在起重机械的吊具顶部,第一声波接收器和第二声波接收器设置在起重机械回转平台表面,两个声波接收器间隔一定距离且两者连线与起重机械回转中心轴线垂直相交,系统还包括用于存储距离信息的存储器,用于控制声波发射器、第一声波接收器和第二声波接收器、获取两个声波接收器与声波发射器之间距离、获取存储器中距离信息并计算得到起升高度的控制器,控制器分别连接声波发射器、第一声波接收器、第二声波接收器和存储器。与现有技术相比,本发明测量准确度高,设备安全性强。(The invention relates to a lifting height monitoring system and a lifting height monitoring method, wherein the system comprises an acoustic wave transmitter, a first acoustic wave receiver and a second acoustic wave receiver, the acoustic wave transmitter is arranged at the top of a lifting appliance of a lifting machine, the first acoustic wave receiver and the second acoustic wave receiver are arranged on the surface of a rotary platform of the lifting machine, the two acoustic wave receivers are spaced at a certain distance, the connection line of the two acoustic wave receivers is perpendicular to the rotary central axis of the lifting machine, the system also comprises a memory for storing distance information, and a controller for controlling the acoustic wave transmitter, the first acoustic wave receiver and the second acoustic wave receiver, obtaining the distance between the two acoustic wave receivers and the acoustic wave transmitter, obtaining the distance information in the memory and calculating the lifting height, wherein the controller is respectively connected with the acoustic wave transmitter, the first acoustic wave receiver, the second acoustic wave receiver and the memory. Compared with the prior art, the method has the advantages of high measurement accuracy and strong equipment safety.)
1. A lifting height monitoring system is characterized by comprising an acoustic wave transmitter, a first acoustic wave receiver and a second acoustic wave receiver, wherein the acoustic wave transmitter is arranged at the top of a lifting appliance of a lifting machine, the first acoustic wave receiver and the second acoustic wave receiver are arranged on the surface of a rotary platform of the lifting machine, the first acoustic wave receiver and the second acoustic wave receiver are spaced at a certain distance, the connection line of the first acoustic wave receiver and the second acoustic wave receiver is perpendicular to the rotary central axis of the lifting machine, the system further comprises a memory for storing the distance between the first acoustic wave receiver and the second acoustic wave receiver, the distance between the surface of the rotary platform and the ground and the distance between the top of the lifting appliance and the tail end of a hook, the system further comprises a controller for controlling the acoustic wave transmitter, the first acoustic wave receiver and the second acoustic wave receiver, obtaining the distance between the two acoustic wave receivers and the acoustic wave transmitter, obtaining the distance information in the memory and calculating the lifting height, the controller is respectively connected with the sound wave transmitter, the first sound wave receiver, the second sound wave receiver and the memory.
2. A hoist height monitoring system according to claim 1, further including an alarm for a hoist height overrun alarm, the alarm being connected to the controller.
3. A hoist height monitoring system according to claim 2, wherein the alarm includes a local alarm and a remote alarm, the local alarm being located in the cab of the hoisting machine.
4. A hoist height monitoring system according to claim 3, wherein the local alarm comprises an audible and visual alarm.
5. A hoist height monitoring system according to claim 3, wherein the remote alarm includes a remote alarm terminal.
6. A hoist height monitoring system according to claim 1, wherein the sonic emitter is an ultrasonic emitter and correspondingly the first and second sonic receivers are ultrasonic receivers.
7. A hoist height monitoring system according to claim 1, wherein the acoustic transmitter, the first acoustic receiver and the second acoustic receiver are each connected to the controller via a communications module.
8. A hoist height monitoring system according to claim 7, wherein the communication module includes a wireless communication module.
9. A hoist height monitoring system according to claim 1, wherein the controller includes any one of a single chip microcomputer and a DSP.
10. A method for monitoring the lifting height, which is based on a lifting height monitoring system as claimed in any one of claims 1 to 9, the method comprising:
the controller controls the operation of the sound wave transmitter, the first sound wave receiver and the second sound wave receiver;
the sound wave transmitter sends sound wave signals to the first sound wave receiver and the second sound wave receiver according to the control signals, the first sound wave receiver and the second sound wave receiver receive the sound wave signals in real time, and the controller calculates the distance L between the first sound wave receiver and the sound wave transmitter according to the sound wave receiving and sending time interval1The distance between the second acoustic receiver and the acoustic transmitter is L2；
Obtaining a first sonic receiver and a second sonic receiver separation D1Distance H between surface of rotary platform and ground1And the distance H between the top of the lifting appliance and the tail end of the hook2；
Calculating the lifting height H:
H＝Hc+H1-H2
wherein HcThe vertical distance between the top of the spreader and the surface of the rotating platform.
Technical Field
The invention relates to the technical field of safety monitoring of hoisting machinery, in particular to a hoisting height monitoring system and method.
Background
The height of a lifting appliance of an arm frame type lifting machine such as a crawler crane is changed along with arm frame combination, the length and the angle of an arm frame and the retraction and release of a lifting steel wire rope. In the prior art, an angle sensor is mostly adopted to measure the angles of a lifting drum and an arm support and indirectly calculate the height of a lifting appliance. In practice, due to the factors such as arm support deformation, the error between the height of the lifting appliance calculated by the method and the actual height is large, and the safe use of equipment is influenced.
Disclosure of Invention
The present invention is directed to a system and method for monitoring a lift height, which overcome the above-mentioned drawbacks of the prior art.
The purpose of the invention can be realized by the following technical scheme:
a lifting height monitoring system comprises a sound wave transmitter, a first sound wave receiver and a second sound wave receiver, wherein the sound wave transmitter is arranged at the top of a lifting appliance of a lifting machine, the first sound wave receiver and the second sound wave receiver are arranged on the surface of a rotary platform of the lifting machine, the first sound wave receiver and the second sound wave receiver are separated by a certain distance, the connection line of the first sound wave receiver and the second sound wave receiver is perpendicular to the rotary central axis of the lifting machine, the system also comprises a memory for storing the distance between the first sound wave receiver and the second sound wave receiver, the distance between the surface of the rotary platform and the ground and the distance between the top of the lifting appliance and the tail end of a hook, the system also comprises a controller for controlling the sound wave transmitter, the first sound wave receiver and the second sound wave receiver, obtaining the distance between the two sound wave receivers and the sound wave transmitter, obtaining the distance information in the memory and calculating the lifting height, the controller is respectively connected with the sound wave transmitter, the first sound wave receiver, the second sound wave receiver and the memory.
Preferably, the system further comprises an alarm for alarming that the lifting height exceeds the limit, and the alarm is connected with the controller.
Preferably, the alarm comprises a local alarm and a remote alarm, and the local alarm is arranged in a cab of the hoisting machinery.
Preferably, the local alarm comprises an audible and visual alarm.
Preferably, the remote alarm comprises a remote alarm terminal.
Preferably, the sound wave transmitter is an ultrasonic wave transmitter, and correspondingly, the first sound wave receiver and the second sound wave receiver are both ultrasonic wave receivers.
Preferably, the sound wave transmitter, the first sound wave receiver and the second sound wave receiver are respectively connected to the controller through a communication module.
Preferably, the communication module comprises a wireless communication module.
Preferably, the controller comprises any one of a single chip microcomputer and a DSP.
A method of monitoring the lift, the method being based on a lift monitoring system as described, the method comprising:
the controller controls the operation of the sound wave transmitter, the first sound wave receiver and the second sound wave receiver;
the sound wave transmitter sends sound wave signals to the first sound wave receiver and the second sound wave receiver according to the control signals, and the first sound wave receiverThe second sound wave receiver receives sound wave signals in real time, and the controller calculates the distance L between the first sound wave receiver and the sound wave transmitter according to the sound wave receiving and transmitting time interval1The distance between the second acoustic receiver and the acoustic transmitter is L2；
Obtaining a first sonic receiver and a second sonic receiver separation D1Distance H between surface of rotary platform and ground1And the distance H between the top of the lifting appliance and the tail end of the hook2；
Calculating the lifting height H:
H＝Hc+H1-H2
wherein HcThe vertical distance between the top of the spreader and the surface of the rotating platform.
Compared with the prior art, the invention has the following advantages:
(1) according to the invention, the acoustic wave transmitting device and the acoustic wave receiving device are respectively arranged on the lifting appliance and the rotary component, so that the lifting height can be conveniently monitored in real time, the measurement is convenient, and the accuracy is high;
(2) the invention is provided with the alarm, so that the alarm can be given in time when the lifting height exceeds the limit, and the safety of equipment is ensured.
Drawings
Fig. 1 is a schematic structural view of a hoist height monitoring system according to the present invention;
in the figure, 1 is a main arm, 2 is an auxiliary arm, 3 is a steel wire rope, 4 is a lifting appliance, 5 is a rotary platform, 6 is a rotary support, and 7 is a crawler.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. Note that the following description of the embodiments is merely a substantial example, and the present invention is not intended to be limited to the application or the use thereof, and is not limited to the following embodiments.
Examples
As shown in fig. 1, the embodiment provides a hoisting height monitoring system by taking a crawler crane as an example, the crawler crane includes a rotary platform 5, the rotary platform 5 is installed on a crawler 7 through a rotary support 6, a crane boom includes a main arm 1 and an auxiliary arm 2, a steel wire rope 3 is arranged at the tail end of the auxiliary arm 2, a lifting appliance 4 is arranged at the tail end of the steel wire rope 3, and a hook is arranged below the lifting appliance 4.
The system for monitoring the lifting height provided by the embodiment comprises an acoustic wave transmitter, a first acoustic wave receiver and a second acoustic wave receiver, wherein the acoustic wave transmitter is arranged at the top of a lifting appliance 4 of a lifting machine, the first acoustic wave receiver and the second acoustic wave receiver are arranged on the surface of a rotary platform 5 of the lifting machine, the first acoustic wave receiver and the second acoustic wave receiver are separated by a certain distance, the connection line of the first acoustic wave receiver and the second acoustic wave receiver is perpendicular to the rotary central axis of the lifting machine, the system further comprises a memory for storing the distance between the first acoustic wave receiver and the second acoustic wave receiver, the distance between the surface of the rotary platform and the ground and the distance between the top of the lifting appliance and the tail end of a hook, the system further comprises a controller for controlling the acoustic wave transmitter, the first acoustic wave receiver and the second acoustic wave receiver, obtaining the distance between the two acoustic wave receivers and the acoustic wave transmitter, obtaining the distance information in the memory and calculating the lifting height, the controller is connected sound wave transmitter, first sound wave receiver, second sound wave receiver and memory respectively, and the controller includes any one in singlechip, DSP, adopts the singlechip in this embodiment.
The system also comprises an alarm for alarming when the lifting height exceeds the limit, and the alarm is connected with the controller. The alarm comprises a local alarm and a remote alarm, the local alarm is arranged in a cab of the hoisting machinery, the local alarm comprises an audible and visual alarm, and the remote alarm comprises a remote alarm terminal, such as a PC (personal computer), a handheld terminal device and the like. When the lifting height exceeds the limit, the alarm can be given in time, and the equipment safety is ensured.
The sound wave transmitter is an ultrasonic wave transmitter, and correspondingly, the first sound wave receiver and the second sound wave receiver are both ultrasonic wave receivers. The sound wave transmitter, the first sound wave receiver and the second sound wave receiver are respectively connected to the controller through the communication module, and the communication module comprises a wireless communication module.
A hoisting height monitoring method is based on a hoisting height monitoring system and comprises the following steps:
the controller controls the operation of the sound wave transmitter, the first sound wave receiver and the second sound wave receiver;
the sound wave transmitter sends sound wave signals to the first sound wave receiver and the second sound wave receiver according to the control signals, the sound wave frequency is 100kHz, the transmitting frequency is 1Hz, the sound wave transmitter receives the control signals and transmits sound waves with the frequency of 100kHz to the first sound wave receiver and the second sound wave receiver at the frequency of 1Hz, the first sound wave receiver and the second sound wave receiver receive the sound wave signals in real time, and the controller calculates the distance L between the first sound wave receiver and the sound wave transmitter according to the sound wave receiving and transmitting time interval1The distance between the second acoustic receiver and the acoustic transmitter is L2；
Obtaining a first sonic receiver and a second sonic receiver separation D1Distance H between surface of rotary platform and ground1And the distance H between the top of the lifting appliance and the tail end of the hook2；
In square Δ PAC:
in right angle Δ PBC:
this gives:
Hcis the vertical distance between the top of the spreader and the surface of the rotating platform, D2B, C is the distance between two points in the graph;
calculating the lifting height H:
H＝Hc+H1-H2
such as L1＝15m，L2＝14.5m，D1＝1m，H1＝1m，H20.5m, then Hc＝13.33m，
H is calculated to 13.83 m.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
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