A substation hoisting operation monitoring system and method

Abstract

The present invention provides a substation hoisting operation monitoring system, including a monitoring host and N infrared distance measuring devices connected thereto; one of the N infrared distance measuring devices is deployed at the head of the crane boom, and the others are deployed on the hoisting object; the N infrared distance measuring devices periodically emit infrared light when the crane is hoisting, and after receiving the infrared reflected light within a certain period, measure the temperature of the primary live equipment and compare it with the temperature threshold to screen out the receiving time of the infrared reflected light and the matching emission time, and calculate the distance to the primary live equipment; the monitoring host receives the distance calculated by the N infrared distance measuring devices in real time, and summarizes and statistics it with a certain interval time period as the basic unit, and determines that the distance that meets the predetermined conditions is less than or equal to the safety distance threshold, and alarms. The implementation of the present invention can monitor the safety distance between the crane boom and the primary equipment in the crane hoisting operation in real time, and reduce the accident rate.

Description

Technical Field

[0001] The present invention relates to the technical field of crane hoisting, and in particular to a substation hoisting operation monitoring system and method. Background Art

[0002] In recent years, there have been many incidents in substations where insufficient safety distance between the crane boom and primary equipment during lifting operations has led to protective action and personal injury accidents, causing not only large-scale power outages but also huge economic losses.

[0003] However, the main reasons for the above phenomenon are as follows: (1) The crane operator's blind spot. It is impossible to effectively judge the front end of the boom and the hoisted object, often because the hoisted object is too large to block the field of vision, and the safe distance between the object and the primary live part behind the boom cannot be judged. Therefore, accidents will occur when the safety distance is insufficient. (2) The on-site supervisor of the hoisting operation cannot perform effective supervision. When the supervisor stands on the ground to monitor the hoisting operation, it is impossible to effectively judge the safe distance between the hoisted object, the boom and the primary live part, because the human eye cannot determine the accurate safety distance, and there is a certain angle between the supervisor and the hoisted object during on-site monitoring, so it is impossible to timely prevent the dangerous points when the safety distance of the hoisting operation is insufficient, such as Figure 1 (3) The primary structure of the substation is complex, and the lifting operation is difficult. Facing the complex primary structure of the substation, it will be difficult to carry out the lifting operation. It may be necessary to observe the surrounding live conditions at every step of the lifting process. Therefore, facing the complex primary live structure, it is necessary to carry out the operation very carefully. When the power system data is abnormal or changes significantly, the work must be stopped immediately, and the site survey and operation process must be re-planned.

[0004] Therefore, it is necessary to provide a substation hoisting operation monitoring system that can monitor the safe distance between the crane boom and the primary equipment during the crane hoisting operation in real time to reduce the accident rate. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a substation hoisting operation monitoring system and method, which can monitor the safe distance between the crane boom and primary equipment during the crane hoisting operation in real time to reduce the accident rate.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a substation hoisting operation monitoring system, which cooperates with primary live equipment, including a monitoring host and N infrared ranging devices connected thereto, where N is a positive integer greater than 1; one of the N infrared ranging devices is deployed at the head of the crane boom, and the remaining N-1 are deployed on the object hoisted by the crane;

[0007] The N infrared distance measuring devices each include a distance measuring unit; the distance measuring unit includes an infrared light transmitting and receiving module, a valid data screening module and a distance measuring module connected in sequence; wherein,

[0008] The infrared light emitting and receiving module is used for periodically emitting infrared light and receiving infrared reflected light fed back by the primary energized equipment during crane hoisting operations;

[0009] The valid data screening module is used to measure the temperature of the primary live device and compare it with a preset temperature threshold after it is determined that the infrared reflected light fed back by the primary live device has been received within a certain cycle time, so as to screen out the reception time of the infrared reflected light when the measured temperature is greater than or equal to the temperature threshold, and the emission time of the infrared light matched within the same cycle time;

[0010] The distance measuring module is used to calculate the distance between itself and the primary charged device according to the reception time of the screened infrared reflected light and the emission time of the infrared light matched with the same cycle moment;

[0011] The monitoring host comprises an effective distance acquisition unit and an alarm unit connected in sequence; wherein,

[0012] The effective distance acquisition unit is connected to the distance measuring units of the N infrared distance measuring devices, and is used to receive the distances calculated by the N infrared distance measuring devices in real time, and summarize and count the received distances based on a certain time interval as a basic unit, and determine the distance that meets the predetermined conditions in each time interval;

[0013] The alarm unit is used to issue an alarm when the distance corresponding to a certain interval time period is determined to be less than or equal to a preset safety distance threshold.

[0014] Each infrared distance measuring device further includes a camera unit; the camera unit is a camera for collecting images of the surrounding environment in real time;

[0015] The monitoring host also includes a real-time image receiving unit; the real-time image receiving unit is connected to the camera unit of each infrared ranging device, and is used to display the environmental images collected by the N infrared ranging devices in real time.

[0016] Wherein, if the camera unit of each infrared distance measuring device is a camera with adjustable angle, each infrared distance measuring device further includes a wireless control unit connected to the camera unit;

[0017] The wireless control unit is used to control the shooting angle of the corresponding connected camera unit to adjust when receiving a control instruction from a remote user.

[0018] Wherein, the N infrared distance measuring devices communicate with the monitoring host wirelessly.

[0019] Wherein, the temperature threshold is 45°C.

[0020] The value range of N is between [3, 5].

[0021] The embodiment of the present invention further provides a method for early warning of safe distance of hoisting operation, which is implemented on the aforementioned substation hoisting operation monitoring system, and the method comprises the following steps:

[0022] During the crane hoisting operation, N infrared distance measuring devices periodically emit infrared light and receive infrared reflected light fed back by the primary live equipment, and after determining that the infrared reflected light fed back by the primary live equipment has been received within a certain period, measure the temperature of the primary live equipment and compare it with a preset temperature threshold, so as to screen out the reception time of the infrared reflected light when the measured temperature is greater than or equal to the temperature threshold, and the emission time of the infrared light matched within the same period, and further calculate the distance between itself and the primary live equipment; wherein N is a positive integer greater than 1;

[0023] The monitoring host receives the distances calculated by the N infrared ranging devices in real time, and summarizes and counts the received distances based on a certain interval time period as a basic unit, determines the distance that meets the predetermined conditions in each interval time period, and issues an alarm when it is determined that the distance determined corresponding to a certain interval time period is less than or equal to a preset safety distance threshold.

[0024] Wherein, the method further comprises:

[0025] The N infrared distance measuring devices also collect surrounding environment images in real time through a preset camera unit, so that the monitoring host can receive and display them in real time.

[0026] Wherein, the method further comprises:

[0027] When the camera units of the N infrared distance measuring devices are all cameras with adjustable angles, control instructions from a remote user can be received through their respective preset wireless control units to control the shooting angles of the corresponding camera units for adjustment.

[0028] The temperature threshold is 45° C. and the value range of N is between [3, 5].

[0029] Implementing the embodiments of the present invention has the following beneficial effects:

[0030] 1. The present invention calculates the distance between itself and the primary live equipment through an infrared distance measuring device deployed on the crane boom head and N-1 infrared distance measuring devices deployed on the crane hoisting object, so that the monitoring host receives it in real time and summarizes and counts it with a certain interval time period as the basic unit, and determines whether the distance that meets the predetermined conditions in each interval time period is less than or equal to the preset safety distance threshold. If so, an alarm is issued, thereby achieving the purpose of real-time monitoring of the safety distance between the crane boom and the primary equipment during the crane hoisting operation and reducing the accident rate;

[0031] 2. The present invention also deploys camera units on N infrared ranging devices to collect images of the surrounding environment in real time, so that the monitoring host can receive and display them in real time, thereby achieving the purpose of real-time image monitoring of the surrounding environment of the crane boom. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0033] Figure 1 It is a schematic diagram of the on-site monitoring scene of the substation hoisting operation in the prior art;

[0034] Figure 2 A schematic diagram of the structure of a substation hoisting operation monitoring system provided by an embodiment of the present invention;

[0035] Figure 3 Another structural schematic diagram of a substation hoisting operation monitoring system provided by an embodiment of the present invention;

[0036] Figure 4 for Figure 3 A schematic diagram of the connection between the mid-infrared distance measuring device and the monitoring host when the mid-infrared distance measuring device includes an angle-adjustable camera unit;

[0037] Figure 5 for Figure 4 The logical structure diagram of a single infrared ranging device;

[0038] Figure 6 An application scenario diagram of a substation hoisting operation monitoring system provided by an embodiment of the present invention;

[0039] Figure 7 for Figure 6The connection diagram of the three infrared distance measuring devices cooperating with the monitoring host to monitor the live busbar of the primary live equipment;

[0040] Figure 8 A flowchart of a method for early warning of a safe distance for lifting operations provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] like Figure 2 As shown in the figure, a substation hoisting operation monitoring system is proposed in an embodiment of the present invention, which cooperates with a primary live equipment (such as a live bus), including a monitoring host and N infrared ranging devices connected to it by wired or wireless (such as WIFI, 4G, 5G, etc.), where N is a positive integer greater than 1; wherein,

[0043] One of the N infrared distance measuring devices is deployed at the head of the crane arm (not shown), and the remaining N-1 are deployed on the object hoisted by the crane; in one example, the value range of N is between [3, 5]; for example, when N=3, one is deployed at the head of the crane arm, and the other two are deployed at two opposite end corners of the object; for example, when N=5, one is deployed at the head of the crane arm, and the other four are deployed at four end corners of the object;

[0044] The N infrared distance measuring devices each include a distance measuring unit 11; each distance measuring unit 11 includes an infrared light transmitting and receiving module 111, a valid data screening module 112 and a distance measuring module 113 connected in sequence; wherein,

[0045] The infrared light transmitting and receiving module 111 is used for periodically (e.g., once every 0.5 seconds) transmitting infrared light and receiving infrared reflected light fed back by the live equipment during the crane hoisting operation;

[0046] The valid data screening module 112 is used to measure the temperature of the primary live device (such as the live bus) and compare it with a preset temperature threshold (such as 45°C) after it is determined that the infrared reflected light fed back by the primary live device has been received within a certain cycle time, so as to screen out the reception time of the infrared reflected light when the measured temperature is greater than or equal to the temperature threshold (such as 45°C), and the emission time of the infrared light matched within the same cycle time; it should be noted that the valid data screening module 112 measures the effective distance of the primary live device (such as the live bus) through the infrared temperature selection, and the distance of the non-live device (such as the non-live bus) can be ignored;

[0047] The distance measuring module 113 is used to calculate the distance between itself and the primary live equipment (such as the live bus) according to the reception time of the screened infrared reflected light and the emission time of the infrared light matched in the same cycle moment; it should be noted that the distance measuring module 113 obtains the size of the distance L between itself and the primary live equipment (such as the live bus) through the formula L=c×t / 2, where c is the speed of light, and t is the time difference between the reception time of the infrared reflected light and the emission time of the infrared light matched in the same cycle moment;

[0048] The monitoring host includes an effective distance acquisition unit 21 and an alarm unit 22 connected in sequence; wherein,

[0049] The effective distance acquisition unit 21 is connected to the distance measuring units 11 of the N infrared distance measuring devices 1, and is used to receive the distances calculated by the N infrared distance measuring devices 1 in real time, and summarize and count the received distances with a certain interval time period as a basic unit (such as 2S as a unit), and determine the distance that meets the predetermined conditions in each interval time period; in an example, the distance that meets the predetermined conditions is set to L Z =min(L1,L2,L3...L n ), where L1, L2, L3...L n Data measured by N infrared distance measuring devices 1;

[0050] The alarm unit 22 is used to give an alarm when the distance corresponding to a certain interval time period is less than or equal to a preset safety distance threshold. It should be noted that the safety distance threshold is set accordingly according to the type of primary live equipment (such as live bus).

[0051] In the embodiment of the present invention, Figure 3 As shown, each infrared ranging device further includes a camera unit 12; the camera unit 12 is a camera, which is used to collect images of the surrounding environment in real time; it should be noted that the camera is an important part of the hoisting monitoring system, so during the entire hoisting operation, the camera must ensure the three important factors of clear, stable and fast image capture. Among them, the camera is located at the top of the boom, which can ensure the monitoring of the entire hoisting process, and the top view is wide and unobstructed, so that the progress of the hoisting and the general situation of each primary live equipment can be paid attention to in real time; other cameras located on the hoisted object ensure other hidden links in the hoisting process. For example, when the hoisted object is too large, it is necessary to pay attention to the primary live equipment around the object at all times to prevent collisions due to the large size of the object and insufficient safety distance;

[0052] The monitoring host also includes a real-time image receiving unit 23; the real-time image receiving unit 23 is connected to the camera unit 12 of each infrared ranging device, and is used to display the environmental images collected by N infrared ranging devices in real time.

[0053] It is understandable that the camera unit 12 of each infrared distance measuring device can be a camera with a fixed angle or a camera with an adjustable angle (such as Figure 4 shown).

[0054] In an example, Figure 5 As shown, if the camera unit 12 of each infrared ranging device is an angle-adjustable camera, each infrared ranging device further includes a wireless control unit 13 connected to the camera unit 12; the wireless control unit 13 is used to control the shooting angle of the corresponding connected camera unit 12 to adjust when receiving a control instruction from a remote user.

[0055] like Figure 6 and Figure 7 As shown, the application scenario of a substation hoisting operation monitoring system in an embodiment of the present invention is further described as follows:

[0056] exist Figure 6 and Figure 7 In the invention, the distance measuring unit and the camera unit in each infrared distance measuring device are integrated into one. That is, the camera can not only take pictures but also measure the distance.

[0057] At this time, the horizontal line between the camera and the ground is used as the measurement standard. The number of cameras can be appropriately installed according to the size of the hoisted object, and 3 cameras are generally selected. At the same time, these 3 cameras communicate with the monitoring host via 4G / 5G.

[0058] The infrared light source inside each camera emits a light source as the transmitting end. When the infrared light irradiates a live device (such as a live bus), the infrared light is interrupted and then acts as the receiving end. According to the formula: L = c × t / 2, the distance L between the camera and the live bus is obtained.

[0059] Each camera selects valid data according to the temperature of infrared rays. For a live device (such as a live bus), a current I will flow through it, so Q = I 2 ×R; where Q is the power generated by the primary live equipment (such as live bus), I is the current flowing through the primary live equipment (such as live bus), and R is the resistance of the primary live equipment (such as live bus). However, the primary live equipment (such as live bus) is proportional to the temperature, and the relationship between temperature T and power Q is: T = K × Q; where K is the conversion coefficient of the material and environmental factors of the primary live equipment (such as live bus).

[0060] Therefore, the materials and environmental factors of primary live equipment (such as live busbars) and non-primary live equipment (non-live busbars) are the same, so the temperature depends on the power of the primary live equipment. At this time, the primary live equipment (such as live busbars) that is greater than the ambient temperature at that time should be selected as the effective data. According to the big data of on-site infrared temperature measurement, it is generally set to be greater than 45°C as the effective value of the distance measurement to obtain the judgment of the effective distance, so as to realize the measurement of the effective distance of infrared ranging during the lifting operation.

[0061] After the actual distance is measured by the measuring devices in the above three cameras, it is transmitted to the monitoring host. The monitoring host selects the minimum distance and the safe distance for live working plus a certain margin as the final safety distance assessment standard, that is, the safety distance threshold. Z =min(L1,L2,L3...L n ) When the safety distance threshold requirement is not met, the alarm will be triggered to issue an alarm warning.

[0062] At the same time, the monitoring host subscribes to the camera through the mobile terminal of the implementation screen, obtains the real-time images of the above three cameras, and also stores the images for subsequent analysis.

[0063] like Figure 8 As shown, a method for early warning of safe distance of hoisting operation is proposed in an embodiment of the present invention, which is implemented on the substation hoisting operation monitoring system in an embodiment of the present invention. The method includes the following steps:

[0064] Step S1, when the crane is lifting, N infrared distance measuring devices periodically emit infrared light and receive infrared reflected light fed back by the primary live equipment, and after determining that the infrared reflected light fed back by the primary live equipment has been received within a certain period, measure the temperature of the primary live equipment and compare it with a preset temperature threshold, so as to screen out the reception time of the infrared reflected light when the measured temperature is greater than or equal to the temperature threshold, and the emission time of the infrared light matched within the same period, and further calculate the distance between itself and the primary live equipment; wherein N is a positive integer greater than 1;

[0065] Step S2, the monitoring host receives the distances calculated by the N infrared ranging devices in real time, and summarizes and counts the received distances based on a certain interval time period as a basic unit, determines the distance that meets the predetermined conditions in each interval time period, and issues an alarm when it is determined that the distance determined corresponding to a certain interval time period is less than or equal to a preset safety distance threshold.

[0066] Wherein, the method further comprises:

[0067] The N infrared distance measuring devices also collect surrounding environment images in real time through a preset camera unit, so that the monitoring host can receive and display them in real time.

[0068] Wherein, the method further comprises:

[0069] When the camera units of the N infrared distance measuring devices are all cameras with adjustable angles, control instructions from a remote user can be received through their respective preset wireless control units to control the shooting angles of the corresponding camera units for adjustment.

[0070] The temperature threshold is 45 degrees; the value range of N is between [3, 5].

[0071] Implementing the embodiments of the present invention has the following beneficial effects:

[0072] 1. The present invention calculates the distance between itself and the primary live equipment through an infrared distance measuring device deployed on the crane boom head and N-1 infrared distance measuring devices deployed on the crane hoisting object, so that the monitoring host receives it in real time and summarizes and counts it with a certain interval time period as the basic unit, and determines whether the distance that meets the predetermined conditions in each interval time period is less than or equal to the preset safety distance threshold. If so, an alarm is issued, thereby achieving the purpose of real-time monitoring of the safety distance between the crane boom and the primary equipment during the crane hoisting operation and reducing the accident rate;

[0073] 2. The present invention also deploys camera units on N infrared ranging devices to collect images of the surrounding environment in real time, so that the monitoring host can receive and display them in real time, thereby achieving the purpose of real-time image monitoring of the surrounding environment of the crane boom.

[0074] A person skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, CD-ROM, etc.

[0075] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A substation lifting operation monitoring system, which cooperates with primary live equipment, is characterized by: Includes a monitoring host and its connected N An infrared distance measuring device, N is a positive integer greater than 1; N One of the infrared distance measuring devices is deployed on the head of the crane boom, and the remaining N-1 One is deployed on the object hoisted by the crane; Said N Each infrared distance measuring device includes a distance measuring unit; the distance measuring unit includes an infrared light transmitting and receiving module, a valid data screening module and a distance measuring module connected in sequence; wherein, The infrared light emitting and receiving module is used for periodically emitting infrared light and receiving infrared reflected light fed back by the primary energized equipment during crane hoisting operations; The valid data screening module is used to measure the temperature of the primary live device and compare it with a preset temperature threshold after it is determined that the infrared reflected light fed back by the primary live device has been received within a certain cycle time, so as to screen out the reception time of the infrared reflected light when the measured temperature is greater than or equal to the temperature threshold, and the emission time of the infrared light matched within the same cycle time; The distance measuring module is used to calculate the distance between itself and the primary energized device according to the reception time of the screened infrared reflected light and the emission time of the infrared light matched with the same period; The monitoring host comprises an effective distance acquisition unit and an alarm unit connected in sequence; wherein, The effective distance acquisition unit and the N The distance measuring units of the infrared distance measuring devices are connected to each other for receiving the N The distances calculated by each infrared distance measuring device are summarized and counted based on a certain interval time period as the basic unit to determine the distance that meets the predetermined conditions in each interval time period; The alarm unit is used to issue an alarm when the distance corresponding to a certain interval time period is less than or equal to a preset safety distance threshold; Each infrared distance measuring device further includes a camera unit; the camera unit is a camera for collecting images of the surrounding environment in real time; The monitoring host also includes a real-time image receiving unit; the real-time image receiving unit is connected to the camera unit of each infrared ranging device, and is used to display the real-time image N Environmental images collected by an infrared ranging device; Wherein, if the camera unit of each infrared distance measuring device is a camera with adjustable angle, each infrared distance measuring device further includes a wireless control unit connected to the camera unit; The wireless control unit is used to control the shooting angle of the corresponding connected camera unit to adjust when receiving a control instruction from a remote user.

2. The substation hoisting operation monitoring system according to claim 1, characterized in that: Said N Each infrared distance measuring device communicates with the monitoring host wirelessly.

3. The substation hoisting operation monitoring system according to claim 2, characterized in that: The temperature threshold is 45°C.

4. The substation hoisting operation monitoring system according to claim 3, characterized in that: Said N The value range is between [3, 5].

5. A method for early warning of safe distance for hoisting operation, characterized in that: The method is implemented on the substation lifting operation monitoring system as described in any one of claims 4, and the method comprises the following steps: N During the crane hoisting operation, an infrared distance measuring device periodically emits infrared light and receives infrared reflected light fed back by a primary live device, and after determining that the infrared reflected light fed back by the primary live device has been received within a certain period, measures the temperature of the primary live device and compares it with a preset temperature threshold, so as to screen out the reception time of the infrared reflected light when the measured temperature is greater than or equal to the temperature threshold, and the emission time of the infrared light matched within the same period, and further calculates the distance between itself and the primary live device; wherein, N is a positive integer greater than 1; The monitoring host receives the N The infrared ranging device calculates the distance respectively, and summarizes the received distance with a certain interval time period as the basic unit, determines the distance that meets the predetermined conditions in each interval time period, and when it is determined that the distance determined corresponding to a certain interval time period is less than or equal to the preset safety distance threshold, an alarm is issued.

6. The method for early warning of safe distance for hoisting operation according to claim 5, characterized in that: The method further comprises: Said N The infrared distance measuring device also collects the surrounding environment image in real time through the preset camera unit, so that the monitoring host can receive and display it in real time.

7. The method for early warning of safe distance for hoisting operation according to claim 6, characterized in that: The method further comprises: In the N When the camera units of the infrared distance measuring devices are all angle-adjustable cameras, they can receive control instructions from remote users through their respective preset wireless control units to control the shooting angles of the corresponding camera units for adjustment.

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