CN-122006168-A - Height difference identification system and identification method for low hanging height of safety rope for safety belt

CN122006168ACN 122006168 ACN122006168 ACN 122006168ACN-122006168-A

Abstract

The invention relates to the technical field of height difference identification, in particular to a height difference identification system and an identification method for a safety rope for a safety belt, which convert the height difference of a hanging point and a head top into millimeter-level numbers, solve the problem that the traditional visual inspection cannot accurately quantify, finish judgment and braking interlocking before falling for 0.1s, change passive protection into active prevention, reduce the falling impact load by more than 70 percent, ensure that delta H error is less than 10mm even if a hook deflects by 30 degrees through IMU inclination compensation, obviously reduce the false alarm rate, automatically finish laser zero calibration after starting up, do not need manual periodic calibration, adapt to severe environments such as dust, rain and snow, and the like, have the positioning precision of 2.5m, accurately trace back each alarm position to form personal risk images, realize data driving safety management, reduce the on-site violation rate by 80 percent, and greatly improve the intrinsic safety level of overhead operation.

Inventors

TAO WEI
ZOU QUAN
HUANG ZHENGHUANG
LAN TIAN
ZHANG JIAMING
LUO YUCHEN
JIA GANGQIANG
WANG HONG

Assignees

四川蜀能电力有限公司

Dates

Publication Date: 20260512
Application Date: 20251222

Claims (7)

1. The height difference identification system for the safety rope low hanging height of the safety belt is characterized by comprising a height acquisition module, a hanging point laser ranging module, a calculation module, a judgment alarm module, a transmission positioning module and an analysis tracing module, wherein the calculation module is respectively connected with the height acquisition module, the hanging point laser ranging module, the judgment alarm module and the transmission positioning module, and the transmission positioning module is respectively connected with the analysis tracing module and the judgment alarm module; the height acquisition module is used for scanning the shortest distance from the top of the head to the bottom of the foot of the operator in real time and outputting a head height dynamic value; The hanging point laser ranging module is used for transmitting pulse laser to the ground right below and receiving a reflected signal to obtain the hanging point ground clearance; the calculation module is used for calculating the height difference based on the head height dynamic value and the hanging point ground clearance height; The judging alarm module is used for triggering local audible and visual alarm based on the height difference and outputting a braking interlocking signal; the transmission positioning module is used for uploading the height difference, the alarm event and the Beidou/GPS coordinates to the cloud end in real time; And the analysis tracing module is used for storing alarm data, the height difference trend and the operation path.
2. A safety harness low hitch height differential identification system as defined in claim 1, wherein, The height acquisition module comprises a millimeter wave radar sensing unit, a head reflection point locking unit and a dynamic value output unit; The millimeter wave radar sensing unit is used for transmitting 60GHz millimeter wave radar waves and receiving human body reflection echoes; the head reflection point locking unit is used for identifying the highest reflection point in the three-dimensional point cloud and removing the interference of the safety cap peak; the dynamic value output unit is used for converting the locked overhead distance into a digital quantity.
3. A safety harness low hitch height differential identification system as defined in claim 1, wherein, The hanging point laser ranging module comprises a laser transmitting unit, a receiving unit and a ground clearance calculating unit; The laser emission unit is used for emitting 905nm primary safety laser pulse to the ground right below; the receiving unit is used for collecting the round trip time of the laser pulse and converting the round trip time into an electric signal; the ground clearance calculation unit is used for calculating the vertical distance between the hanging point and the ground according to the flight time.
4. A safety harness low hitch height differential identification system as defined in claim 1, wherein, The computing module comprises an attitude compensation unit, a height difference operation unit and a filtering smoothing unit; the attitude compensation unit is used for reading the nine-axis IMU angle and calculating the inclination correction amount; The altitude difference operation unit is used for executing real-time arithmetic operation of altitude differences; The filtering smoothing unit is used for carrying out moving average filtering on the height difference and eliminating abrupt noise.
5. A safety harness low hitch height differential identification system as defined in claim 1, wherein, The judgment alarm module comprises a threshold comparison unit, an acousto-optic driving unit and an interlocking signal output unit; The threshold value comparison unit is used for comparing the height difference with a preset early warning value and a dangerous value in hardware; The acousto-optic driving unit is used for driving the buzzer and the red LED to flash when the height difference is lower than the threshold value; and the interlocking signal output unit is used for outputting a 3.3V braking interlocking level to the speed difference automatic controller in a dangerous state.
6. A safety harness low hitch height differential identification system as defined in claim 1, wherein, The transmission positioning module comprises a Beidou/GPS positioning unit, a 4G/5G communication unit and a data packaging unit; the Beidou/GPS positioning unit is used for acquiring longitude and latitude coordinates of an operator at the frequency of 1 Hz; The 4G/5G communication unit is used for wirelessly uploading data to the cloud through an MQTT protocol; And the data packaging unit is used for packaging the height difference, the alarm type, the coordinates and the time stamp into a JSON frame.
7. A method for identifying a height difference for a low-hanging height of a safety rope for a safety belt, for use in the height difference identification system for a low-hanging height of a safety rope for a safety belt according to any one of claims 1 to 6, characterized by comprising the steps of: The height acquisition module performs sector scanning on the operation area by using a 60GHz millimeter wave radar, locks the highest reflection point of the head of a human body, and outputs the head height dynamic value in real time; The hanging point laser ranging module transmits 905nm laser pulse to the ground right below, and acquires the hanging point ground clearance in a TOF mode; The calculation module reads the hook attitude angle obtained by the nine-axis IMU, calculates the inclination correction amount and calculates the real-time height difference; the judgment alarm module compares the height difference with a preset threshold value and starts local audible and visual alarm; the transmission positioning module packages and uploads the height difference, the alarm type, the Beidou/GPS coordinates and the time stamp to the cloud; and the analysis traceability module performs time sequence storage, risk portrait generation and visual display on the uploaded data to form a personal/team low-hanging high-use trend report, so that closed-loop management is realized.

Description

Height difference identification system and identification method for low hanging height of safety rope for safety belt Technical Field The invention relates to the technical field of height difference identification, in particular to a height difference identification system and a height difference identification method for a safety rope for a safety belt. Background With the increasing frequency of aloft work, the importance of anti-falling protection of operators is becoming more prominent. The national standard and industry standard both require that the safety belt adopts a high-hanging low-use mode, namely the hanging point of the safety rope must be higher than the head of an operator so as to ensure that the braking distance is shortest and the impact force is smallest when the safety belt falls. However, the field environment is complex and changeable, and operators often hang the safety rope below the waist due to limited space, insufficient anchor points or careless operation, so that a low-hanging high-use state is formed. At this time, once falling occurs, the free falling distance of a human body is lengthened, the safety rope is required to bear instantaneous multiplied impact load, rope body breakage, anchor point failure or serious injury of personnel are extremely easy to be caused, and the safety rope becomes a main technical cause of high-altitude falling accidents. In the prior art, the identification of low hanging high use still stays in the stage of manual visual inspection or video tracing after operation, and a real-time, quantitative and automatic monitoring means is lacked. Part of schemes try to install a travel switch or an inclination sensor at an anchor point, only judge whether a hook is hung or not, and can not acquire the relative height difference between the hanging point and the head of a human body, and also embed a tension sensor in a safety belt webbing, and alarm through a falling impact threshold, but the safety belt webbing belongs to post passive protection and can not pre-warn. More importantly, the technology does not solve the problem of accurate measurement of dynamic height difference, namely, the height of the head can be changed in real time due to the height difference of operators, fluctuation of standing surfaces, bending/lifting arms and other gesture changes, the height of hanging points can be switched along with different anchor points, and the heights of two ends cannot be synchronously sensed by the traditional single-point sensor, so that the missing report and the false report rate are high. Therefore, developing a system level solution that can continuously identify the height difference of the hanging point and the head top before and during the operation, and immediately alarm and upload the platform in an audible and visual manner when the hanging point and the head top are low and high is used has become an urgent need for improving the intrinsic safety of the overhead operation. Disclosure of Invention The invention aims to provide a height difference identification system and a height difference identification method for low hanging height of a safety rope for a safety belt, and aims to solve the problem that the false alarm rate is high because the relative height between the hanging point of the safety rope and the head of an operator cannot be monitored in real time. In order to achieve the above purpose, in a first aspect, the invention provides a height difference identification system for a safety rope for a safety belt, comprising a height acquisition module, a hanging point laser ranging module, a calculation module, a judgment alarm module, a transmission positioning module and an analysis tracing module, wherein the calculation module is respectively connected with the height acquisition module, the hanging point laser ranging module, the judgment alarm module and the transmission positioning module, and the transmission positioning module is respectively connected with the analysis tracing module and the judgment alarm module; the height acquisition module is used for scanning the shortest distance from the top of the head to the bottom of the foot of the operator in real time and outputting a head height dynamic value; The hanging point laser ranging module is used for transmitting pulse laser to the ground right below and receiving a reflected signal to obtain the hanging point ground clearance; the calculation module is used for calculating the height difference based on the head height dynamic value and the hanging point ground clearance height; The judging alarm module is used for triggering local audible and visual alarm based on the height difference and outputting a braking interlocking signal; the transmission positioning module is used for uploading the height difference, the alarm event and the Beidou/GPS coordinates to the cloud end in real time; And the analysis tracing module is used for storing alarm data, the he