CN109857032B - Power distribution construction safety monitoring system - Google Patents
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- CN109857032B CN109857032B CN201910143615.2A CN201910143615A CN109857032B CN 109857032 B CN109857032 B CN 109857032B CN 201910143615 A CN201910143615 A CN 201910143615A CN 109857032 B CN109857032 B CN 109857032B
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Abstract
The invention belongs to the technical field of power distribution network construction protection, and particularly relates to a power distribution construction safety monitoring system. The invention discloses a power distribution construction safety monitoring system, which comprises a detection component, an analysis component and a warning component, wherein the detection component is used for detecting the voltage of a power distribution system; the system utilizes the special sound information of the construction equipment to judge the type of the construction equipment, and then obtains the corresponding operation area of each construction equipment, and after information analysis is carried out on the installation mode and the structure of the distribution equipment in the operation area, early warning and analysis are carried out on the equipment collision possibly occurring in the operation area and the information of the distribution equipment in a visual blind area in advance, the system device is of a non-fixed structure, the system device can be installed and used in different areas as required, the area capable of monitoring and protecting can be freely expanded as required, and supervision and early warning in larger areas can be realized by more monitoring stations.
Description
Technical Field
The invention belongs to the technical field of power distribution network construction protection, and particularly relates to a power distribution construction safety monitoring system.
Background
Different from general construction operation, when construction is carried out in a distribution network and a power distribution network, the power distribution network and the equipment devices in the power distribution network and the power distribution network are various in types and installation modes, and the power distribution network and the equipment devices in the power distribution network comprise various transmission lines and electric poles crossing the air, base stations and power distribution equipment installed on the ground, transmission cables installed below the ground and other various pipelines; because various structures are complicated by mistake and can not be found in time often in a visual blind area, construction work in the area needs to be cautious, the work progress is slow, a specially-assigned person is required to supervise and alarm in many times, the existing mechanism is prevented from being damaged in the construction process, a supervision alarm person is used, the part of the device structure which is positioned below the ground or in the visual blind area is also damaged undoubtedly in the construction process, and the installation mode and the arrangement mode of various complicated distribution equipment in the construction area can not be well known by the constructor, so the construction method is also inevitable.
Disclosure of Invention
The invention aims to provide a power distribution construction safety monitoring system, which analyzes a possibly dangerous area of construction operation on the basis of considering the construction range and distance of construction equipment, automatically analyzes and warns in combination with the position and size information of power distribution equipment, and warns in advance the possibly occurring destructive behavior to assist construction operators to operate cautiously, prevent the damage of a power distribution structure, improve the construction efficiency and reduce the personnel cost.
In order to achieve the purpose, the invention adopts the following technical scheme.
The invention discloses a power distribution construction safety monitoring system, which comprises a detection component, an analysis component and a warning component, wherein the detection component is used for detecting the voltage of a power distribution system;
the detection part comprises at least two movable detection tables, each detection table comprises a fixed assembly arranged at the bottom, a supporting assembly arranged above the fixed assembly and a detection assembly arranged on the supporting assembly; the fixing assembly is used for keeping the stability of the detection platform or fixedly connecting the detection platform to a power grid structure; the supporting assembly is used for enabling the detection assembly to be higher than the ground, and the detection assembly is used for acquiring construction equipment data; the detection assembly is internally provided with a positioning chip for acquiring position data of the detection assembly, a construction equipment data detection device for acquiring construction equipment data information and a wireless data transmission device for wireless data transmission;
the analysis component comprises a wireless data receiving device for acquiring construction equipment data information and positioning information, a data processing device for acquiring and processing the construction equipment data, and a data analysis device for analyzing the construction equipment data and calculating the construction equipment position information;
the warning component comprises a local storage device for storing the geographical position data of the power distribution facilities in the construction area and the construction data of known construction equipment, wherein the geographical position data comprises GIS data of the power distribution facilities on the ground surface, buried depth data of the power distribution facilities buried underground or partially buried underground, and position height data of the power distribution facilities arranged in a hanging or floating mode; the construction data comprises the maximum construction distance, the maximum construction depth and the maximum construction height data of the known construction equipment;
the warning component also comprises a cache device which is connected with the data analysis device to acquire construction equipment data and construction equipment position information data, an information analysis device which is connected with the local storage device and the cache device to acquire corresponding data, judge and compare the data and send warning information according to the judgment and comparison results, and a warning device which is connected with the information analysis device;
the information analysis device acquires construction equipment data from the cache device, calculates the corresponding maximum construction range and maximum construction depth of the construction equipment according to the known construction equipment construction data stored in the local storage device, reads the geographical position data of the power distribution facility in the construction area from the local storage device, judges whether the maximum construction range of the construction equipment at each moment is interfered with the installation position of the power distribution facility in the range, judges whether the maximum construction depth of the construction equipment reaches the buried depth of the construction facility in the construction range, judges whether the maximum operation height of the construction equipment reaches the installation height of the suspended power distribution facility in the construction range, and starts warning information when one or more judgment items are yes;
the warning device acquires the warning information and sends out sound or light or action warning.
The further optimization of the scheme also comprises that the construction equipment data detection device is a sound level acquisition device, and the sound level acquisition device is used for acquiring sound level signal data of each construction equipment;
the construction equipment data processing device comprises a filter for filtering non-target sound level signals, an analog-to-digital converter for performing FFT (fast Fourier transform) on the sound signals, and a sampler for extracting and counting frequency distribution of the sound level signals;
the construction equipment data analysis device comprises a data memory for storing the frequency distribution of the sound level signals of the known construction equipment, a data comparator for comparing the frequency distribution of the sound level signals of the construction equipment with the frequency distribution of the sound level signals of the known construction equipment, and a processor for acquiring positioning data of a positioning chip in the detection assembly and the sound level data acquired by the sound level acquisition device and calculating the type and the position of the construction equipment.
Further optimization of the above scheme further comprises that the construction equipment data analysis device is configured to: reading sound level signals of known construction equipment, and extracting signal data with fixed length; performing frame windowing on the signal data with fixed length; analyzing and calculating based on the signal data subjected to framing and windowing to obtain linear prediction cepstrum coefficients corresponding to the known construction equipment, and obtaining characteristic data of sound level signals of the known construction equipment by utilizing an SVM classification algorithm; extracting the detected sound level signal of the construction equipment, and acquiring the characteristic data of the sound level signal of the construction equipment to be detected; matching and comparing the characteristic data of the sound level signal of the known construction equipment with the characteristic data of the sound level signal of the construction equipment to be detected by using a matching algorithm to obtain a characteristic identification result, and judging the type of the construction equipment to be detected; performing FFT conversion on the sound level signals of the construction equipment obtained by detection, estimating the initial angle of each frequency point, constructing a focusing matrix, and calculating angle data of the construction equipment and each detection component under the reference frequency point; and calculating the angle result of the construction equipment and each detection assembly.
The further optimization of the scheme also comprises that the distance between every two detection tables is not more than 200 meters, and the distance between the detection tables and the construction equipment is not more than 300 meters.
The power distribution construction safety monitoring device according to claim 2, wherein the filter comprises a second-order Butterworth low-pass filter formed by a single-chip double operational amplifier chip, and a fourth-order low-pass filter is formed by a cascade circuit;
the sampler comprises an ADS1274 sampling chip, a MODE0 pin and a FORMAT pin of the ADS1274 sampling chip are connected with a low level, a MODE0 pin is connected with a high level, an SPI pin is set as a communication interface and is connected to the communication interface of the sampler, and a VOCM pin is set as a common-MODE voltage output end and is connected to a VOCM pin of the differential amplifier;
the construction equipment data processing device also comprises an audio signal amplifier, wherein the audio signal amplifier comprises a same-phase amplifying circuit comprising an operational amplifier U3A, and a sound level signal of the construction equipment is input from a same-phase end of the amplifying circuit after passing through a filter; a filter capacitor C is arranged on the reverse input loop of the in-phase amplifying circuit8；
The output signal of the operational amplifier U3A is connected with a DC bias circuit, and the bias voltage U of the DC bias circuitp＝0.3-0.8U0，U0Supplying the power supply with a voltage.
The beneficial effects are that:
the invention discloses a power distribution construction safety monitoring system, which analyzes the installation mode and the arrangement characteristics of power distribution equipment in power distribution network regional structures such as power distribution stations and the like, judges the type of construction equipment by using special sound information of the construction equipment to further obtain corresponding operation regions of each construction equipment, and performs information analysis on the installation mode and the structure of the power distribution equipment in the operation regions, and performs early warning and analysis on equipment collision possibly occurring in the operation regions and information of the power distribution equipment in a visual blind area, wherein the system device is of a non-fixed structure, can be installed and used in different regions according to requirements, the regions capable of being monitored and protected can be freely expanded according to requirements, more monitoring stations can realize supervision and early warning in larger regions, the system does not need manual maintenance operation, and only needs to be arranged before construction, and let the position mounting means's of power distribution station staff or construction operation personnel all kinds of structures information such as input according to transformer substation design information, can carry out analysis early warning automatically during later stage construction operation, this system's whole process is brief and data processing is simple, has abundant extension and optimization space, and the equipment structure in the construction area can effectively be protected as the security technical scheme when complicated regional construction operations such as power distribution station, reduces the construction accident.
Drawings
FIG. 1 is a schematic illustration of a power distribution construction safety monitoring system;
FIG. 2 is a filter circuit of a power distribution construction safety monitoring system;
FIG. 3 is a circuit of an audio signal amplifier of the power distribution construction safety monitoring system;
fig. 4 is an analog-to-digital converter circuit of the power distribution construction safety monitoring system.
Detailed Description
The invention is described in detail below with reference to specific embodiments.
As shown in fig. 1, which is a schematic diagram of a power distribution construction safety monitoring system according to the present invention, the present invention analyzes and judges the position and type of a construction device by acquiring data information of the construction device in a construction area in real time, and thereby determines the construction range of the device, by which the construction range of the device and the distance between a power distribution facility and the construction device are determined.
In a power distribution area such as a power distribution station and the like, the power distribution area comprises a plurality of ground facilities such as distribution boxes, electric poles and the like, and a plurality of structures suspended in the air by means of suspension and the like, such as power transmission lines and the like, and meanwhile, a plurality of pipelines, cables and other structures are buried under the ground of the area, compared with the traditional construction site, the power distribution area has a plurality of types of obstacles and complicated distribution positions, so that the power distribution facilities are often damaged in the equipment operation process due to the limitation of visual dead angles in the construction process of the power distribution area, the damaged facilities have long repair time, the stability of the power distribution network is greatly influenced, and a specially-assigned person is generally required to carry out on-site supervision and management in the construction operation process of the power distribution network area, so that the extra workload and the personnel cost are increased, the problem cannot be solved well, and the reason is that the vision of the person is limited, the specific state and the relative position relation of the power distribution facility in a suspended or buried state cannot be accurately known, and the specific state and the relative position relation of the power distribution facility including parts of facilities on the ground can be only roughly estimated or predicted due to visual obstruction, light influence and the like, and when more construction equipment exists in a field and a supervisor cannot clearly understand the construction equipment or the field environment, the occurrence of damage accidents can not be completely avoided.
Based on the current situation, the power distribution construction safety monitoring system provided by the invention continuously monitors equipment on a construction site in real time through an automatic information acquisition and data analysis technology, and performs early warning on possible damage accidents after analyzing and comparing data such as the state and position of power distribution facilities in an area, thereby avoiding the occurrence of other accidents, effectively ensuring the safety of the power distribution area during construction and preventing the power grid facilities from being accidentally damaged, and the power distribution construction safety monitoring system comprises a detection component, an analysis component and a warning component.
In the invention, at least two detection tables are needed for collecting data of a certain construction device to ensure that complete data is obtained, the position relation between the construction device and the detection tables is determined through the comparative analysis of two groups of data, and the position data of the construction device is generated by utilizing the positioning information of the detection tables, as can be seen from the principle of figure 1, in the actual use process, the detection tables should keep proper distance between each two detection tables, and based on the detection precision of common positioning devices, the actual distance between the detection tables should not exceed 200 meters to ensure the data precision, and also based on the limitation of the monitoring range of a conventional acousto-optic sensor and the environmental characteristics of a power distribution area, the distance between the detection tables and the construction device should not exceed 300 meters. In special cases, the above ranges are adjusted according to the performance of the respective device when a special sensor or positioning device is used.
The detection table comprises a fixed assembly arranged at the bottom, a supporting assembly arranged above the fixed assembly and a detection assembly arranged on the supporting assembly;
the fixing component is used for keeping the stability of the detection platform or fixedly connecting the detection platform to a power grid structure, and can be a base structure such as a base fixed by gravity, for example, a common cement pouring or metal cake-shaped base, or an inserted rod capable of being inserted into the ground or a fastener capable of being fixed on a power distribution facility or other structures, and the like, and the fixing component is used for fixing and supporting the detection platform, and the structure principle is simple and well known in the prior art, and is not repeated;
in order to prevent signals from being shielded too strongly and improve the efficiency of data acquisition due to special requirements of detection and distribution area environments, a support assembly is required to be used to enable the detection assembly to be higher than the ground by a certain distance which is not less than 2m under the general condition, and when the detection platform is set to be a movable structure, the height of the support assembly is not too long;
the detection assembly is a core assembly of the detection platform and is used for acquiring construction equipment data; the detection assembly is internally provided with a positioning chip for acquiring position data of the detection assembly, a construction equipment data detection device for acquiring construction equipment data information and a wireless data transmission device for wireless data transmission; acquiring position data of the detection assemblies through the positioning chip, analyzing and calculating the position relation of the construction equipment relative to the detection assemblies by combining the position data of the detection assemblies and the data of the equipment acquired by the detection assemblies, and further determining the position of the construction facility;
in this embodiment, the construction equipment data detection device is a sound level acquisition device, such as an AWA sound level meter, and after analyzing and comparing the sound level data of the existing equipment based on actual needs during specific use, when the sound level meter is adopted, it should be noted that the lower frequency monitoring limit of the adopted sound level meter should be not higher than 4.5kHz, and the upper frequency detection limit of the sound level meter should be not higher than 12kHz, so as to ensure that all necessary sound level signals can be extracted, and at the same time avoid excessive overlapping with the noise frequency domain,
the sound level acquisition device is used for acquiring sound level signal data of each construction device; different construction equipment can be distinguished through characteristic data such as frequency, amplitude of the sound level signal data of construction equipment, and the sound level signal characteristic of common construction equipment is shown in table 1:
TABLE 1 Sound level signal characteristics of common construction equipment
| Type of device | Digging machine | Hydraulic crusher | Electric pickaxe | Cutting machine |
| Frequency of sound level | 5.6～6.1kHz | 6.6kHz～7.2kHz | 7.8～8.1kHz | 8.5～9.0kHz |
In order to extract correct signals, the construction equipment data processing device is also provided with a filter for filtering non-target sound level signals, wherein the basic structure of the filter comprises a second-order Butterworth low-pass filter consisting of a single-chip double operational amplifier chip, and a fourth-order low-pass filter consisting of a cascade circuit; the filter circuit is shown in fig. 2; wherein, in order to weaken the influence of capacitance resistance value on the overall performance of the filter, the selection performance of the filter is kept relatively stable, and the capacitor C can be ensured17、C18、C19、C20The capacitance values are equal, so that the resistance R is equal39、R40、R41、R42The resistance values are equal.
In this embodiment, according to the requirement of the actual situation on site, the data processing device of the construction equipment further includes an audio signal amplifier, the audio signal amplifier includes a non-inverting amplifying circuit including an operational amplifier U3A, and a sound level signal of the construction equipment is input from a non-inverting terminal of the amplifying circuit after passing through a filter; a filter capacitor C is arranged on the reverse input loop of the in-phase amplifying circuit8To facilitate control of the magnification; the circuit configuration of the audio signal amplifier is shown in fig. 3.
For the data processing of the sampler, the sound signal is FFT-converted by an analog-to-digital converter, the analog-to-digital converter circuit is shown in fig. 4, and the output signal of the filter is converted into a differential output signal after passing through the analog-to-digital converter; the data processed by the analog-to-digital converter is transmitted to a sampler for extracting and counting the frequency distribution of the sound level signals; the sampler includes the ADS sampling chip, and in concrete structure, MODE0, the FORMAT pin of ADS sampling chip connect the low level, and MODE1 pin connects the high level, and the SPI pin sets up to communication interface and is connected to the communication pin of treater, and the VOCM pin sets up to common MODE voltage output end and is connected to the VOCM pin of amplifier in the analog-to-digital converter.
In particular, differential drive is adopted in the analog-to-digital converter, and a matching resistor R for improving the output of the amplifier is also arranged in the analog-to-digital conversion circuit33、R34Bypass capacitors C are respectively added in the feedback loops of the analog-to-digital conversion circuits15And C16The bypass capacitor can filter high-frequency noise, so that the accuracy of data conversion is improved, and the conversion precision is improved.
The output signal of the operational amplifier U3A is connected with a DC bias circuit, and the bias voltage U of the DC bias circuitp＝0.3-0.8U0，U0Supplying power supply voltage to the power supply;
the construction equipment data analysis device comprises a data storage device used for storing the frequency distribution of the sound level signals of the known construction equipment, a data comparator used for comparing the frequency distribution of the sound level signals of the construction equipment with the frequency distribution of the sound level signals of the known construction equipment, and a sampler used for acquiring positioning data of a positioning chip in the detection assembly and the sound level data acquired by the sound level acquisition device and calculating the type and the position of the construction equipment.
The analysis component comprises a wireless data receiving device for acquiring construction equipment data information and positioning information, a data processing device for acquiring and processing the construction equipment data, and a data analysis device for analyzing the construction equipment data and calculating the construction equipment position information;
the warning component comprises a local storage device for storing the geographical position data of the power distribution facilities in the construction area and the construction data of known construction equipment, wherein the geographical position data comprises GIS data of the power distribution facilities on the ground surface, buried depth data of the power distribution facilities buried underground or partially buried underground, and position height data of the power distribution facilities arranged in a hanging or floating mode; the construction data comprises the maximum construction distance, the maximum construction depth and the maximum construction height data of the known construction equipment;
the warning component also comprises a cache device which is connected with the data analysis device to acquire construction equipment data and construction equipment position information data, an information analysis device which is connected with the local storage device and the cache device to acquire corresponding data, judge and compare the data and send warning information according to the judgment and comparison results, and a warning device which is connected with the information analysis device;
the information analysis device acquires construction equipment data from the cache device, calculates the corresponding maximum construction range (an area shown by a dotted line in figure 1) and the maximum construction depth H of the construction equipment according to the known construction equipment construction data stored in the local storage device, reads the geographical position data of the power distribution facility in the construction area from the local storage device, judges whether the maximum construction range of the construction equipment at each moment is interfered with the installation position of the power distribution facility in the range, judges whether the maximum construction depth H of the construction equipment reaches the buried depth H of the construction facility in the construction range, judges whether the maximum operation height S of the construction equipment reaches the installation height S of the suspended power distribution facility in the construction range, and starts warning information when one or more judgment items are yes;
the warning device acquires the warning information and sends out sound or light or action warning.
The step of calculating the type and position of the construction equipment by the construction equipment data analysis device includes:
reading sound level signals of known construction equipment, and extracting signal data with fixed length; performing frame windowing on the signal data with fixed length;
analyzing and calculating based on the signal data subjected to framing and windowing to obtain linear prediction cepstrum coefficients corresponding to the known construction equipment, and obtaining characteristic data of sound level signals of the known construction equipment by utilizing an SVM classification algorithm;
extracting the detected sound level signal of the construction equipment, and acquiring the sound level signal characteristic data of the construction equipment to be detected after processing;
matching and comparing the characteristic data of the sound level signal of the known construction equipment with the characteristic data of the sound level signal of the construction equipment to be detected by using a matching algorithm to obtain a characteristic identification result, and judging the type of the construction equipment to be detected;
performing FFT conversion on the sound level signals of the construction equipment obtained by detection, estimating the initial angle of each frequency point, constructing a focusing matrix, and calculating angle data of the construction equipment and each detection component under the reference frequency point; and calculating the angle result of the construction equipment and each detection assembly.
The distance L between every two detection tables is not more than 200 meters, and the distance T between the detection tables and construction equipment is not more than 283 meters.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (3)
1. A power distribution construction safety monitoring system is characterized by comprising a detection component, an analysis component and a warning component;
the detection part comprises at least two movable detection tables, each detection table comprises a fixed assembly arranged at the bottom, a supporting assembly arranged above the fixed assembly and a detection assembly arranged on the supporting assembly; the fixing assembly is used for keeping the stability of the detection platform or fixedly connecting the detection platform to a power grid structure; the supporting assembly is used for enabling the detection assembly to be higher than the ground, and the detection assembly is used for acquiring construction equipment data; the detection assembly is internally provided with a positioning chip for acquiring position data of the detection assembly, a construction equipment data detection device for acquiring construction equipment data information and a wireless data transmission device for wireless data transmission;
the analysis component comprises a wireless data receiving device for acquiring construction equipment data information and positioning information, a data processing device for acquiring and processing the construction equipment data, and a data analysis device for analyzing the construction equipment data and calculating the construction equipment position information;
the warning component comprises a local storage device for storing the geographical position data of the power distribution facilities in the construction area and the construction data of known construction equipment, wherein the geographical position data comprises GIS data of the power distribution facilities on the ground surface, buried depth data of the power distribution facilities buried underground or partially buried underground, and position height data of the power distribution facilities arranged in a hanging or floating mode; the construction data comprises the maximum construction distance, the maximum construction depth and the maximum construction height data of the known construction equipment;
the warning component also comprises a cache device which is connected with the data analysis device to acquire construction equipment data and construction equipment position information data, an information analysis device which is connected with the local storage device and the cache device to acquire corresponding data, judge and compare the data and send warning information according to the judgment and comparison results, and a warning device which is connected with the information analysis device;
the information analysis device acquires construction equipment data from the cache device, calculates the corresponding maximum construction range and maximum construction depth of the construction equipment according to the known construction equipment construction data stored in the local storage device, reads the geographical position data of the power distribution facility in the construction area from the local storage device, judges whether the maximum construction range of the construction equipment at each moment is interfered with the installation position of the power distribution facility in the range, judges whether the maximum construction depth of the construction equipment reaches the buried depth of the construction facility in the construction range, judges whether the maximum operation height of the construction equipment reaches the installation height of the suspended power distribution facility in the construction range, and starts warning information when one or more judgment items are yes;
the construction equipment data detection device is a sound level acquisition device, the sound level acquisition device is used for acquiring sound level signal data of each construction equipment, and different construction equipment is distinguished through frequency and amplitude characteristic data of the sound level signal data of the construction equipment;
the data processing device comprises a filter for filtering non-target sound level signals, an analog-to-digital converter for FFT conversion of the sound signals, and a sampler for extracting and counting frequency distribution of the sound level signals;
the data analysis device comprises a data memory for storing the frequency distribution of the sound level signals of the known construction equipment, a data comparator for comparing the frequency distribution of the sound level signals of the construction equipment with the frequency distribution of the sound level signals of the known construction equipment, and a processor for acquiring positioning data of a positioning chip in the detection assembly and the sound level data acquired by the sound level acquisition device and calculating the type and the position of the construction equipment;
the construction equipment data processing device comprises a filter for filtering non-target sound level signals, an analog-to-digital converter for performing FFT (fast Fourier transform) on the sound signals, and a sampler for extracting and counting frequency distribution of the sound level signals;
in specific implementation, an analog-to-digital converter is used for carrying out FFT conversion on the sound signal, and an output signal of a filter is converted into a differential output signal after passing through the analog-to-digital converter; the data processed by the analog-to-digital converter is transmitted to a sampler for extracting and counting the frequency distribution of the sound level signals;
the step of calculating the type and position of the construction equipment by the construction equipment data analysis device includes:
reading sound level signals of known construction equipment, and extracting signal data with fixed length; performing frame windowing on the signal data with fixed length;
analyzing and calculating based on the signal data subjected to framing and windowing to obtain linear prediction cepstrum coefficients corresponding to the known construction equipment, and obtaining characteristic data of sound level signals of the known construction equipment by utilizing an SVM classification algorithm;
extracting the detected sound level signal of the construction equipment, and acquiring the sound level signal characteristic data of the construction equipment to be detected after processing;
matching and comparing the characteristic data of the sound level signal of the known construction equipment with the characteristic data of the sound level signal of the construction equipment to be detected by using a matching algorithm to obtain a characteristic identification result, and judging the type of the construction equipment to be detected;
performing FFT conversion on the sound level signals of the construction equipment obtained by detection, estimating the initial angle of each frequency point, constructing a focusing matrix, and calculating angle data of the construction equipment and each detection component under the reference frequency point; calculating angle results of the construction equipment and each detection assembly;
the warning device acquires warning information and sends out sound or light or action warning.
2. The power distribution construction safety monitoring system according to claim 1, wherein the distance between every two detection tables is not more than 200 meters, and the distance between the detection tables and construction equipment is not more than 300 meters.
3. The power distribution construction safety monitoring system according to claim 1, wherein the filter comprises a second-order Butterworth low-pass filter formed by a single double operational amplifier chip, and a fourth-order low-pass filter is formed by a cascade circuit;
the sampler comprises an ADS1274 sampling chip, a MODE0 pin and a FORMAT pin of the ADS1274 sampling chip are connected with a low level, a MODE0 pin is connected with a high level, an SPI pin is set as a communication interface and is connected to the communication interface of the sampler, and a VOCM pin is set as a common-MODE voltage output end and is connected to a VOCM pin of a differential amplifier;
the construction equipment data processing device also comprises an audio signal amplifier, wherein the audio signal amplifier comprises a non-inverting amplifying circuit comprising an operational amplifier U3A, and a sound level signal of the construction equipment is input from a non-inverting end of the amplifying circuit after passing through a filter; a filter capacitor C is arranged on the reverse input loop of the in-phase amplifying circuit8；
The output signal of the operational amplifier U3A is connected with a DC bias circuit, and the bias voltage U of the DC bias circuitp＝0.3-0.8U0，U0Supplying the power supply with a voltage.
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| CN106153108A (en) * | 2016-07-08 | 2016-11-23 | 蓝龙飞 | A kind of multifunctional high pressure power station detection device |
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