Monitoring system and control method thereof

Abstract

The invention discloses a monitoring system and a control method thereof, and relates to the technical field of electric power construction. The main technical scheme of the invention is: a monitoring system, which is used for monitoring a traction machine, comprises a force sensor, a force change rate analyzer and an alarm device, wherein the force sensor is electrically connected to the output end of the traction machine and is used to detect the traction force data of the traction machine; the force change rate analyzer comprises a filtering sampling device and a processor; the filtering sampling device is electrically connected to the output end of the force sensor, receives the traction force data of the traction machine and performs filtering sampling; the processor is electrically connected to the output end of the filtering sampling device, calculates the traction force change rate of the traction machine according to the traction force data sample within a preset time and compares the traction force change rate with a preset value; the input end of the alarm device is electrically connected to the output end of the processor, and is used to receive an alarm instruction and send an alarm signal; when the processor determines that the traction force change rate is greater than the preset value, an alarm instruction is sent to the alarm device.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power construction, and in particular to a monitoring system and a control method thereof. Background Art

[0002] Currently, all power transmission lines are constructed using tension stringing, especially during the stringing of UHV lines. The maximum traction force can reach about 16 tons. With such a large traction force, once common faults occur on the line, such as conductor jumping, plank jamming, etc., it will cause each tower to tilt or even topple over, which is a safety hazard. Therefore, current traction equipment at home and abroad is equipped with safety pre-adjustment devices to limit the maximum traction force of the traction equipment to prevent the above-mentioned faults.

[0003] Since the safety pre-adjustment device of the traction equipment only limits the maximum traction force, that is to say, if the traction force increases rapidly in a short period of time but does not reach the set value, the traction machine will not alarm. However, during the period of rapid increase in traction force, it means that a fault has occurred somewhere in the line, but at this time, the traction equipment cannot alarm; therefore, there is a safety "blind spot" in the construction of transmission lines, which poses a great safety hazard to the construction. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a monitoring system and a control method thereof, the main purpose of which is to solve the problem in the prior art that during tension line construction, the rapid increase of traction force in a short period of time is ignored as a warning signal causing line failure, thereby failing to take precautions in advance, resulting in a safety "blind spot" and bringing great safety hazards to the construction.

[0005] In order to achieve the above object, the present invention mainly provides the following technical solutions:

[0006] An embodiment of the present invention provides a monitoring system for monitoring a traction machine, comprising:

[0007] A force sensor, the force sensor is electrically connected to the output end of the traction machine and is used to detect the traction force data of the traction machine;

[0008] A force change rate analyzer, the force change rate analyzer comprising a filter sampling device and a processor; the filter sampling device is electrically connected to the output end of the force sensor, receives the traction force data of the traction machine and performs filter sampling; the processor is electrically connected to the output end of the filter sampling device, calculates the traction force change rate of the traction machine according to the traction force data sample within a preset time and compares the traction force change rate with a preset value;

[0009] An alarm device, the input end of which is electrically connected to the output end of the processor, for receiving an alarm instruction and sending an alarm signal;

[0010] When the processor determines that the rate of change of the traction force is greater than the preset value, an alarm instruction is sent to the alarm device.

[0011] Optionally, in the aforementioned monitoring system, the filtering sampling device comprises a filter, a signal amplifier and an AD sampling unit;

[0012] The input end of the filter is electrically connected to the force sensor, receives the traction force data of the traction machine and filters out interference signals;

[0013] The input end of the signal amplifier is electrically connected to the output end of the filter, and the output end of the signal amplifier is electrically connected to the input end of the AD sampling unit, amplifying the traction force data of the traction machine after the filtering operation to the effective sampling range of the AD sampling unit;

[0014] The output end of the AD sampling unit is electrically connected to the processor, and sends a single sample to the processor at a preset frequency;

[0015] The time interval of the preset frequency is shorter than the preset time.

[0016] Optionally, in the aforementioned monitoring system, the processor includes a calculation unit, a judgment unit and a storage unit;

[0017] The calculation unit is electrically connected to the filter sampling device and the storage unit, and is used to calculate the average traction force of the traction force data sample collected once and store it in the storage unit; and the calculation unit calculates the traction force change rate between two adjacent average traction forces in the plurality of average traction forces within the preset time and calculates the average value, and the average value of the traction force change rate is the traction force change rate;

[0018] The judgment unit is electrically connected to the calculation unit and the alarm device, and is used to receive the average value of the traction force change rate and compare the average value of the traction force change rate with the preset value;

[0019] Wherein, when the average value of the traction force change rate is greater than the preset value, the judgment unit sends an alarm instruction to the alarm device.

[0020] Optionally, in the aforementioned monitoring system, the force change rate analyzer further comprises an input device and a display device;

[0021] The input device is electrically connected to the input terminal of the processor to set the preset value and the preset time;

[0022] The display device is electrically connected to the output terminal of the processor and displays the preset value and the traction force change rate.

[0023] Optionally, in the aforementioned monitoring system, the alarm device is connected to the signal of the driving device of the traction machine to send an emergency stop signal to the driving device of the traction machine.

[0024] Optionally, in the aforementioned monitoring system, the force sensor is a torque sensor, and the torque sensor is electrically connected to the output shaft of the traction machine.

[0025] On the other hand, an embodiment of the present application provides a control method of a monitoring system, which includes the following steps: determining a preset value of a rate of change of traction force of a traction machine and inputting the preset value into a force change rate analyzer;

[0026] Connecting the force sensor to the output end of the traction machine, connecting the force sensor to a force change rate analyzer, and connecting the force change rate analyzer to an alarm device;

[0027] Detecting the traction force data of the traction machine, and calculating the traction force change rate of the traction machine within a preset time according to the traction force data;

[0028] comparing the traction force change rate with the preset value, and sending an alarm instruction to the alarm device when the traction force change rate is greater than the preset value;

[0029] The alarm device sounds an alarm.

[0030] Furthermore, the above-mentioned step of determining a preset value of the rate of change of the traction force of the traction machine and inputting the preset value into the force change rate analyzer includes:

[0031] The characteristic parameters of the line-string section path are obtained, and the traction force change rate of the straight tower and the traction force change rate of the corner tower are calculated in combination with the approved construction plan, and the maximum values ​​of the traction force change rate of the straight tower and the traction force change rate of the corner tower are selected as the preset value.

[0032] Furthermore, the aforementioned step of detecting the traction force data of the traction machine and calculating the traction force change rate of the traction machine within a preset time according to the traction force data includes:

[0033] The traction force data is sampled at a preset frequency, and the traction force change rate between multiple samples within a preset time is obtained and an average value is calculated. The average value of the traction force change rate is the traction rate change rate.

[0034] Furthermore, the aforementioned step of sampling the traction force data at a preset frequency, obtaining the traction force change rate between multiple samples within a preset time and calculating the average value includes:

[0035] The average traction force of a single sampling sample is obtained and stored, and the traction force change rate between two adjacent average traction forces in a preset time is obtained and the average value is calculated.

[0036] Furthermore, the step of the alarm device alarming includes:

[0037] The alarm device sends an alarm message and / or the alarm device sends an emergency stop signal to the traction machine.

[0038] A monitoring system and a control method thereof proposed in an embodiment of the present invention are used to solve the problem in the prior art that, during tension line construction, the rapid increase in traction force in a short period of time is ignored as an early warning signal causing line failure, thereby failing to take precautions in advance, resulting in a safety "blind spot", which brings great safety hazards to construction; the monitoring system in the present application detects the traction force data output by the traction machine through a force sensor, transmits the data to the filter sampling device of the force change rate analyzer to filter out the interference signal of the on-site construction environment, and then performs sampling, and then the processor performs analysis, processing and calculation to obtain the traction force change rate within a preset time, and further compares the traction force change rate with a preset value. If the traction force change rate is greater than the preset value, an alarm signal is issued through the alarm device, so that construction personnel can handle or adjust it in time. The system has predictability, can detect the change of the traction force of the traction machine in a short period of time in advance and effectively, and is helpful to discover safety hazards in advance. The monitoring system in the present application is automatic detection and alarm, which conforms to the concept of mechanized construction in the front process and reduces the impact of construction personnel on safe construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the structure of a monitoring system provided by an embodiment of the present invention;

[0040] Figure 2 A detailed structural diagram of a detection system provided by an embodiment of the present invention;

[0041] Figure 3 A schematic flow chart of a control method of a detection system provided by an embodiment of the present invention;

[0042] Figure 4 A detailed flow chart of a control method of a detection system provided by an embodiment of the present invention;

[0043] Figure 5 A schematic diagram of force analysis of a straight tower in a control method of a detection system provided by an embodiment of the present invention;

[0044] Figure 6 A schematic diagram of force analysis of a corner tower in a control method of a detection system provided by an embodiment of the present invention;

[0045] In the figure: sensor 1, force change rate analyzer 2, filtering sampling device 21, filter 211, signal amplifier 212, AD sampling unit 213, processor 22, calculation unit 221, judgment unit 222, storage unit 223, input device 23, display device 24, alarm device 3. DETAILED DESCRIPTION

[0046] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation, structure, features and effects of a detection system and its control method proposed by the present invention in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0047] The technical solution of the embodiment of the present invention is to solve the above technical problems, and the overall idea is as follows:

[0048] Example 1

[0049] Reference Figure 1 The present invention provides a monitoring system, which includes a force sensor 1, a force change rate analyzer 2 and an alarm device 3; the force sensor 1 is electrically connected to the output end of the traction machine, and is used to detect the traction data of the traction machine; the force change rate analyzer 2 includes a filter sampling device 21 and a processor 22; the filter sampling device 21 is electrically connected to the output end of the force sensor 1, receives the traction data of the traction machine and performs filter sampling; the processor 22 is electrically connected to the output end of the filter sampling device 21, calculates the traction change rate of the traction machine according to the traction data sample within a preset time and compares the traction change rate with a preset value; the input end of the alarm device 3 is electrically connected to the output end of the processor 22, and is used to receive an alarm instruction and send an alarm signal;

[0050] When the processor 22 determines that the rate of change of the traction force is greater than the preset value, an alarm instruction is sent to the alarm device 3.

[0051] Specifically, in order to solve the problem in the prior art that the rapid increase of traction force in a short period of time is ignored as a warning signal causing line failure during tension line construction, and thus it is impossible to take precautions in advance, resulting in a safety "blind spot", which brings great safety hazards to construction, the present invention provides a monitoring system, which includes the force sensor 1, the force rate change analyzer 2 and the alarm device 3, which detects the traction data of the traction machine through the force sensor 1, and sends the traction data of the traction machine to the force change rate analyzer for processing, analysis and comparison. The above traction data is sampled after filtering out the on-site interference signal through the filtering sampling device 21 of the force change rate analyzer 2, and the sample is processed, analyzed, calculated and compared in the processor to obtain the traction change rate within the preset time, and compare the traction change rate with the preset value. When the processor 22 determines that the traction change rate is greater than the preset value, it sends an alarm instruction to the alarm device 3, and the alarm 3 sends an alarm message, so that the construction personnel can handle or prevent it in time.

[0052] Among them, the force sensor 1 is an electronic component that converts a force signal into an electrical signal output, that is, a device with the function of detecting the size of the force; in this embodiment, the force sensor 1 can be set as a torque sensor or a hydraulic sensor, for example: when the force sensor 1 is set as a hydraulic sensor, the hydraulic sensor is set on the hydraulic mechanism of the traction machine to indirectly reflect the traction force; when the force sensor 1 is set as a torque sensor, the torque sensor is electrically connected to the output shaft of the traction machine, so that the traction force can be accurately detected at a right angle. In this embodiment, the force sensor is preferably set as a torque sensor.

[0053] Among them, the force change rate analyzer 2 has the functions of data transmission and reception, processing and analysis comparison, and is composed of the filter sampling device 21 and the processor 22. The filter sampling device 21 has the functions of data transmission and reception, filtering and sampling, which can be realized by programming, but no further details are given here; the processor 22 has the functions of data transmission and reception, processing and analysis comparison, which can be realized by programming, but no further details are given here; the filter sampling device 21 and the processor 22 cooperate to sample and calculate the traction data of the traction machine, obtain the traction change rate of the traction machine and compare the traction change rate with the preset value, when When the processor 22 determines that the rate of change of the traction force is greater than the preset value, it sends an alarm instruction to the alarm device 3, and the alarm device 3 sends an alarm message; the preset value is a critical value or threshold value set in the processor 22 after pre-estimation, indicating the critical value or threshold value of the rate of increase of the traction force of the traction machine within a preset time. If the rate of increase of the traction force within the preset time exceeds the preset value, it means that a fault occurs somewhere in the overhead line at this time. If no adjustment or processing is performed, the base tower is likely to tilt or collapse in the line; wherein, the estimation method of the preset value will be described in detail in the following content.

[0054] Among them, the alarm 3 is a device with the function of issuing an alarm signal, such as: an audible and visual alarm, a voice broadcaster, a buzzer, etc. It can be set to issue a buzzer alarm, a voice broadcast, a light reminder, and a combination of the above three methods. It is not difficult to implement for those skilled in the art, so no further details will be given here.

[0055] According to the above, the monitoring system in the present application detects the traction data output by the traction machine through the force sensor 1, transmits it to the filter sampling device 21 of the force change rate analyzer to filter out the interference signal of the on-site construction environment and then performs sampling, and then the processor 22 performs analysis, processing and calculation to obtain the traction change rate within a preset time, and further compares the traction change rate with the preset value. If the traction change rate is greater than the preset value, an alarm signal is issued through the alarm 3 to facilitate construction personnel to handle or adjust in time. It is predictive and can detect the change of the traction force of the traction machine in a short time in advance and effectively, which is helpful to discover safety hazards in advance. The monitoring system in the present application is automatic detection and alarm, which conforms to the concept of mechanized construction in the front process and reduces the impact of construction personnel on safe construction.

[0056] For further information, see Attachment Figure 2 , an embodiment of the present invention provides a detection system. In a specific implementation, the filtering sampling device 21 includes a filter 211, a signal amplifier 212 and an AD sampling unit 213;

[0057] The input end of the filter 211 is electrically connected to the force sensor 1 to receive the traction force data of the traction machine and filter out interference signals;

[0058] The input end of the signal amplifier 212 is electrically connected to the output end of the filter 211, and the output end of the signal amplifier 212 is electrically connected to the input end of the AD sampling unit 213, amplifying the traction force data of the traction machine after the filtering operation to the effective sampling range of the AD sampling unit 213;

[0059] The output end of the AD sampling unit 213 is electrically connected to the processor 22, and sends a single sample to the processor 22 at a preset frequency; wherein the time interval of the preset frequency is less than the preset time.

[0060] Specifically, in order to realize the filtering sampling of the filtering sampling device 21 and ensure the accuracy, real-time and security of the detection data, in this embodiment, the filtering sampling device 21 is set to be composed of the filter 211, the signal amplifier 212 and the sampling unit 213 cooperating with each other; the filter 211 can effectively filter the frequency point of a specific frequency in the power line or the frequency other than the frequency point to obtain a power signal of a specific frequency, or eliminate a power signal of a specific frequency. In this embodiment, the power supply noise interference, electromagnetic interference and other signals in the voltage signal emitted by the force sensor 1 are filtered out by the filter 211, and the traction voltage signal is retained to ensure the accuracy of the later sampling data; this is not difficult to achieve for those skilled in the art, and no further details are given here. The signal amplifier 212 is a device for amplifying electrical signals. Since the electrical signals are small, it is not conducive to subsequent sampling and processing analysis. This is not difficult to achieve for those skilled in the art, and no further details are given here. At the same time, the AD sampling unit 213 has the function of sampling signals within the effective sampling range (the AD sampling unit 213 is an A / D chip), so the signal amplification unit 212 needs to amplify the traction data signal to the effective sampling range of the AD sampling unit 213, so that it can be collected by the AD sampling unit 213 and then used for subsequent analysis and processing. For example: the effective sampling unit of the AD sampling unit 213, that is, the applicable range, is 5-10v, then only the voltage signal within this range can be collected as a sample, and the original traction data may be a voltage signal of 0.02-0.1v when output by the force sensor 1, then the signal amplifier 212 needs to be amplified by 100 times, so that part of the traction voltage signal can be collected as a sample. This process is called data acquisition filtering, which is not difficult to achieve for those skilled in the art and will not be elaborated on here. It should be noted that the above data examples are limited to examples and do not limit the protection scope of this application. Among them, the processor 22 will calculate the average value of the traction force change rate of the samples collected multiple times to ensure the accuracy of the data. Then, the AD sampling unit 213 is set to sample at a preset frequency, so that multiple collections can be performed within the preset time. For example: once every 100ms, then 10 groups of samples need to be collected within the preset time (for example, 10ms) for analysis and processing to ensure the reliability of data processing.

[0061] For further information, see Attachment Figure 2 , an embodiment of the present invention provides a monitoring system. In a specific implementation, the processor 22 includes a calculation unit 221, a judgment unit 222 and a storage unit 223;

[0062] The calculation unit 221 is electrically connected to the filter sampling device 211 and the storage unit 223, and is used to calculate the average traction force of the traction force data sample collected once and store it in the storage unit 223; and the calculation unit 221 calculates the traction force change rate between two adjacent average traction forces in the plurality of average traction forces within the preset time and calculates the average value, and the average value of the traction force change rate is the traction force change rate;

[0063] The judgment unit 222 is electrically connected to the calculation unit 221 and the alarm device 3, and is used to receive the average value of the traction force change rate and compare the average value of the traction force change rate with the preset value;

[0064] When the average value of the traction force change rate is greater than the preset value, the judgment unit 223 sends an alarm instruction to the alarm device 3 .

[0065] Specifically, in order to realize the processing, analysis, calculation and comparison of multiple traction force data samples and obtain a more accurate traction force change rate, in this embodiment, the processor 22 is configured to include the calculation unit 221, the judgment unit 222 and the storage unit 223; the calculation unit 221 has the function of data statistical calculation, which can be realized by simple programming and will not be described in detail here. In this embodiment, the calculation unit 221 averages the single sampling data of the AD sampling unit 213 to obtain the average traction force (the subsequent data obtained by using the average traction force will be more accurate or more universal). For example: within the first 100ms, the AD sampling unit 213 collects 8 traction force data, then The calculation unit 221 will calculate the average traction force of the 8 traction forces, and then store the average traction force in the storage unit 223, and use it again after multiple average traction forces are obtained later. Then after a preset time, for example, the preset time is 10ms, 10 traction force average values ​​will be stored in the storage unit 223. The calculation unit 221 will call out the 10 traction force average values ​​in the storage unit 223 and calculate the change rate between two adjacent average traction forces. 9 change rates will be calculated for the 10 average traction forces. To ensure the accuracy and universality of the data, the calculation unit 221 in this embodiment calculates the average of the above 9 change rates, and the average value is the traction force change rate.

[0066] Further, such as Figure 2 As shown, a monitoring system proposed in one embodiment of the present invention, in a specific implementation, the force change rate analyzer 2 further includes an input device 23 and a display device 24;

[0067] The input device 23 is electrically connected to the input terminal of the processor 22 to set the preset value and the preset time;

[0068] The display device 24 is electrically connected to the output end of the processor 22 to display the preset value and the traction force change rate.

[0069] Specifically, in order to realize the intelligence, practicality and convenience of the force change rate analyzer 2, in this embodiment, the input device 23 and the display device 24 are coordinated with the processor 22 to make the rate change analyzer 2 more intelligent; the input device 23 is a touch display screen and / or a mechanical input device. When the input device 23 is a touch display screen, the input device 23 and the display device 24 are combined into one, and are used to pre-set the preset value and the preset time in the processor 22 by touch editing, which is not difficult to achieve for those skilled in the art and will not be elaborated on here; when the input device 23 is a mechanical input device, such as a keyboard, the keyboard is electrically connected to the processor 22, and is used to pre-set the preset value and the preset time in the processor 22 by tapping editing, which is not difficult to achieve for those skilled in the art and will not be elaborated on here.

[0070] Example 2

[0071] Furthermore, on the basis of Example 1, in the detection system provided by the embodiment of the present invention, in a specific implementation, the alarm device 3 is connected to the signal of the driving device of the traction machine, and sends an emergency stop signal to the driving device of the traction machine.

[0072] Specifically, in order to realize the automation and intelligence of the detection system and avoid the occurrence of faults caused by subjective misjudgment, in this embodiment, the alarm device 3 is connected to the drive device signal of the traction machine. The signal connection here can be a wired electrical connection or a wireless Bluetooth connection, which will not be described in detail here; specifically, when the force change rate analyzer 2 determines that the traction force change rate is greater than the preset value, the force change rate analyzer 2 sends an alarm instruction to the alarm device 3. When the alarm device 3 sends the alarm signal, it also sends an emergency stop signal to the drive device of the traction machine, so that the drive device of the traction machine stops working, that is, the traction machine is stopped urgently, so as to avoid the operator's misjudgment in this process or the inability to handle the existing fault when the operating conditions do not allow, resulting in large fault losses.

[0073] Furthermore, an embodiment of the present invention provides a tension wire system, which includes the monitoring system and a traction machine in Embodiment 1; the force sensor 1 of the monitoring system is electrically connected to the output shaft of the traction machine.

[0074] The specific operation method is described in detail in Example 1 and Example 2, and will not be elaborated here.

[0075] Furthermore, an embodiment of the present invention provides a tension wire system, wherein the alarm device 3 of the monitoring system is connected to the signal of the driving device of the traction machine, and is used to send an emergency stop signal to the driving device while issuing an alarm signal. The detailed implementation method refers to the detailed description of Example 1 and Example 2, and no further details are given here.

[0076] Example 3

[0077] Further, see Attachment Figure 3 , a control method of a monitoring system provided by an embodiment of the present invention, in a specific implementation, comprises the following steps:

[0078] 101. Determine a preset value of a rate of change of the traction force of the traction machine and input the preset value into a force change rate analyzer;

[0079] Specifically, the characteristic parameters of the cable stringing section path are obtained according to the construction drawings, and in combination with the approved construction plan, the straight tower traction force change rate and the corner tower traction force change rate are calculated through the tension cable stringing calculation method, and the maximum values ​​of the straight tower traction force change rate and the corner tower traction force change rate are selected as the preset value.

[0080] 102. Connect the force sensor 1 to the output end of the traction machine, connect the force sensor 1 to the force change rate analyzer 2, and connect the force change rate analyzer 2 to the alarm device 3;

[0081] The input end of the force sensor 1 is connected to the output shaft of the traction machine, and the output end of the force sensor 1 is connected to the filter sampling device 21 of the force change analyzer 2, and the processing unit 22 of the force change rate analyzer 2 is connected to the alarm device 3; the alarm device 3 here can be connected to the driving device of the traction machine by signal or not, which are two embodiments provided in this application.

[0082] 103. Detecting the traction force data of the traction machine, and calculating the traction force change rate of the traction machine within a preset time according to the traction force data;

[0083] Specifically, the traction force data is sampled at a preset frequency, the traction force change rate between multiple samples within a preset time is obtained and the average value is calculated, and the average value of the traction force change rate is the traction rate change rate;

[0084] More specifically, the average traction force of a single sampling sample is obtained and stored, and the traction force change rate between two adjacent average traction forces among multiple average traction forces within a preset time is obtained and the average value is calculated.

[0085] 104. Compare the traction force change rate with the preset value, and when the traction force change rate is greater than the preset value, send an alarm instruction to the alarm device;

[0086] 105. The alarm device 3 sounds an alarm;

[0087] Specifically, the alarm device 3 sends an alarm message and / or the alarm device 3 sends an emergency stop signal to the traction machine.

[0088] Further, see Attachment Figure 4 , the embodiment of the present application provides a control method for a monitoring system. In a specific implementation, the above step 101 is specifically the following steps:

[0089] 201. Obtain the characteristic parameters of the cable section through the design drawings;

[0090] For example, parameters such as the distance between the spanning object, the classification of the spanning object under the spanning frame, the tower type selection, the safe distance between the line and the spanning object, the height of the ground wire bracket, the length of the ground wire pulley hanger, the distance between the front and rear wire hanging points of the crossarm, the length of the conductor pulley hanger, the ground wire data, the tower elevation, the span, the tower height, the length of the insulator string, the ground wire parameters, etc. The above parameters can be directly obtained through the design drawings and are well known to those skilled in the art, so they will not be elaborated here.

[0091] 202. According to the characteristic parameters of the line-laying section and the approved construction plan, the tension line-laying calculation method is used to obtain the parameters such as the traction force, tension in each line-laying gear, and the envelope angle of each tower line-laying pulley when laying out the guide rope, traction rope, and conductor;

[0092] The tension wire calculation method is well known to those skilled in the art and will not be described in detail here.

[0093] 203. Calculate the change rate of the traction force of the straight tower kz and the change rate of the traction force of the corner tower k j , select the linear tower traction force change rate kz and the corner tower traction force change rate k j The maximum value is used as the preset value; and step 102 is directly executed after step 203;

[0094] Specifically, because the cables in the down-line of the power line need to pass through the straight tower and the corner tower, the board may get stuck or jump on the two base towers, which will cause the traction force to increase rapidly in a short time;

[0095] Reference Figure 5, is a problem that easily occurs when the cable is on the pulley of a straight tower. It is normal for the cable to move to the left under the tension on the pulley at position B. When the cable jumps, the cable or the board is stuck on the pulley, causing the pulley to be driven by the cable to shift to position A. At this time, the angle α between B and A determines whether the base tower will tilt or collapse. According to experience, it is very easy for the base tower to tilt or collapse when the angle α is 60 degrees. Therefore, in this embodiment, the angle α=60 degrees is used as the reference value, and the rate of change of the traction force on the cable during the pulley from B to A is calculated as required by this embodiment; the length of the suspension insulator of the pulley set on the base tower is a fixed value L, and the length of the suspension insulator of the pulley set on the base tower is ... When the pulley is at position A, the tension F1 received by the cable is the largest, and the tension received by the cable must increase during the process from position B to position A, so the change value of the cable received tension during this period is F1-F2, then the linear tower traction force change rate kz=(F1-F2) / t, t is the time required for the pulley to move from position B to position A, during this time t, the pulley travels an arc length of Lπ / 3 with a radius of the length L of the suspension insulator and an angle of 60, and the tension machine's pay-off speed v is known, so time t=Lπ / 3v, further, the linear tower traction force change rate kz=3v(F1-F2) / Lπ;

[0096] Reference Figure 6 , is a problem that the cable is prone to occur on the pulley of the corner tower. When the cable is at position B, it is subjected to a tensile force F2, and the board is stuck in the pulley or the cable jumps out of the groove, causing the traction force to increase until the board moves to position A. At this time, the traction force of the traction machine is maximum F1. The angle between B and A is the envelope angle β, which has been obtained in step 202. The bottom diameter of the pulley groove is D. The principle is the same as above. The tension of the board must increase during the movement from B to A. During this period, the change value of the cable received tension is F1-F2, then the linear tower traction force change rate kz=(F1-F2) / t, t is the time required for the board to move from position B to position A. During this time t, the pulley has traveled a section of the arc length of the pulley, that is, the arc length πDβ / 360 corresponding to the envelope angle β. The wire release speed v of the tension machine is known, so the time t=πDβ / 360v. Further, the linear tower traction force change rate kz=360v(F1-F2) / πDβ;

[0097] Specifically, each laying route has two types of base towers, namely, a straight tower and a corner tower, and then a maximum value is selected from the two force change rates calculated above as the preset value.

[0098] Further, see Attachment Figure 4 In a control method of a monitoring system provided in an embodiment of the present application, in a specific implementation, the above step 103 is specifically the following steps:

[0099] 301. The filtering sampling device 211 performs sampling according to a preset rate and sends a single sampling sample to the processor 22;

[0100] The operation process of filtering, amplifying and sampling of the filtering sampling device 211 can be referred to the detailed contents of the above-mentioned embodiment 1, and will not be elaborated in detail here.

[0101] 302. The calculation unit 221 in the processor 22 receives samples, calculates the average traction force and stores it;

[0102] 303. The calculation unit 221 in the processor 22 calculates the traction force change rate between two adjacent average traction forces among a plurality of average traction forces within a preset time and calculates the average value;

[0103] Within the first 100ms, the AD sampling unit 213 collects 8 traction force data, then the calculation unit 221 will calculate the average traction force of the 8 traction forces, and then store the average traction force in the storage unit 223, and use it again after multiple average traction forces are obtained later. Then after a preset time, for example: the preset time is 10ms, there will be 10 traction force average values ​​stored in the storage unit 223, and the calculation unit 221 will call out the 10 traction force average values ​​in the storage unit 223, and calculate the change rate between two adjacent average traction forces. 9 change rates will be calculated for the 10 average traction forces. To ensure the accuracy and universality of the data, the calculation unit 221 in this embodiment calculates the average of the above 9 change rates, and the average value is the traction force change rate; step 104 is directly executed after this step.

[0104] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A monitoring system for monitoring a traction machine, characterized in that: It includes: A force sensor, the force sensor is electrically connected to the output end of the traction machine and is used to detect the traction force data of the traction machine; A force change rate analyzer, the force change rate analyzer comprising a filter sampling device and a processor; the filter sampling device is electrically connected to the output end of the force sensor, receives the traction force data of the traction machine and performs filter sampling; The processor is electrically connected to the output end of the filter sampling device, and calculates the traction force change rate of the traction machine according to the traction force data samples within a preset time and compares the traction force change rate with a preset value; An alarm device, the input end of which is electrically connected to the output end of the processor, for receiving an alarm instruction and sending an alarm signal; Among them, the calculation of the linear tower traction force change rate k z and the change rate of the traction force of the corner tower k j , select the linear tower traction force change rate kz and the change rate of the traction force of the corner tower k j The maximum value is used as the preset value, and when the processor determines that the rate of change of the traction force is greater than the preset value, an alarm instruction is sent to the alarm device; k z =3v(F1-F2) / Lπ(1) k j = 360v(F1-F2) / πDβ(2); In formula (1), F2 is the tension on the cable during normal operation, F1 is the tension on the cable or the board when the cable jumps and is stuck on the pulley, L is the length of the suspension insulator of the pulley, and V is the pay-off speed of the tension machine; In formula (2), F2 is the tension on the cable during normal operation, F1 is the tension on the board when it is stuck on the pulley or the cable jumps the groove, D is the bottom diameter of the pulley groove, β is the envelope angle of the cable from the normal operation state to the board stuck on the pulley or the cable jumps the groove, and V is the pay-off speed of the tension machine.

2. The monitoring system according to claim 1, characterized in that: The filtering and sampling device comprises a filter, a signal amplifier and an AD sampling unit; The input end of the filter is electrically connected to the force sensor, receives the traction force data of the traction machine and filters out interference signals; The input end of the signal amplifier is electrically connected to the output end of the filter, and the output end of the signal amplifier is electrically connected to the input end of the AD sampling unit, amplifying the traction force data of the traction machine after the filtering operation to the effective sampling range of the AD sampling unit; The output end of the AD sampling unit is electrically connected to the processor, and sends a single sample to the processor at a preset frequency; The time interval of the preset frequency is shorter than the preset time.

3. The monitoring system according to claim 1, characterized in that: The processor includes a calculation unit, a judgment unit and a storage unit; The calculation unit is electrically connected to the filter sampling device and the storage unit, and is used to calculate the average traction force of the traction force data sample collected once and store it in the storage unit; and the calculation unit calculates the traction force change rate between two adjacent average traction forces in the plurality of average traction forces within the preset time and calculates the average value, and the average value of the traction force change rate is the traction force change rate; The judgment unit is electrically connected to the calculation unit and the alarm device, and is used to receive the average value of the traction force change rate and compare the average value of the traction force change rate with the preset value; Wherein, when the average value of the traction force change rate is greater than the preset value, the judgment unit sends an alarm instruction to the alarm device.

4. The monitoring system according to claim 1, characterized in that: The force change rate analyzer also includes an input device and a display device; The input device is electrically connected to the input terminal of the processor to set the preset value and the preset time; The display device is electrically connected to the output terminal of the processor and displays the preset value and the traction force change rate.

5. The monitoring system according to claim 1, characterized in that: The alarm device is connected to the driving device signal of the traction machine and sends an emergency stop signal to the driving device of the traction machine.

6. The monitoring system according to claim 1, characterized in that: The force sensor is a torque sensor, and the torque sensor is electrically connected to the output shaft of the traction machine.

7. A detection method based on the monitoring system according to any one of claims 1 to 6, characterized in that: It includes the following steps: Determining a preset value of the rate of change of the traction force of the traction machine and inputting the preset value into the force change rate analyzer; Connecting the force sensor to the output end of the traction machine, connecting the force sensor to a force change rate analyzer, and connecting the force change rate analyzer to an alarm device; Detecting the traction force data of the traction machine, and calculating the traction force change rate of the traction machine within a preset time according to the traction force data; comparing the traction force change rate with the preset value, and sending an alarm instruction to the alarm device when the traction force change rate is greater than the preset value; The alarm device sounds an alarm.

8. The detection method of the monitoring system according to claim 7, characterized in that: The step of determining a preset value of the rate of change of the traction force of the traction machine and inputting the preset value into the force change rate analyzer includes: The characteristic parameters of the line-string section path are obtained, and the traction force change rate of the straight tower and the traction force change rate of the corner tower are calculated in combination with the approved construction plan, and the maximum values ​​of the traction force change rate of the straight tower and the traction force change rate of the corner tower are selected as the preset value.

9. The detection method of the monitoring system according to claim 7, characterized in that: The step of detecting the traction force data of the traction machine and calculating the traction force change rate of the traction machine within a preset time according to the traction force data includes: The traction force data is sampled at a preset frequency, and the traction force change rate between multiple samples within a preset time is obtained and an average value is calculated. The average value of the traction force change rate is the traction force change rate.

10. The detection method of the monitoring system according to claim 7, characterized in that: The steps of sampling the traction force data at a preset frequency, obtaining a traction force change rate between multiple samples within a preset time and calculating an average value include: The average traction force of a single sampling sample is obtained and stored, and the traction force change rate between two adjacent average traction forces in a preset time is obtained and the average value is calculated.

11. The detection method of the monitoring system according to claim 7, characterized in that: The step of the alarm device alarming includes: The alarm device sends an alarm message and / or the alarm device sends an emergency stop signal to the traction machine.

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