Background
At present, the construction of infrastructure of an electric power system is developed from a rapid development stage to a high-quality development stage, the power supply reliability of a user becomes an important index of the service quality of a power supply enterprise, the power failure condition of operating equipment and a line is reduced, the number of risks of live working close to newly building and reconstructing and expanding construction of power transmission and transformation is increased year by year, the environment of a working site is complex, the identification of the live equipment and the line is very important, the near-electric distance of construction machinery is difficult to observe, and a near-electric working safety distance monitoring and early warning system becomes an urgent.
In recent years, casualties and regional power failure events occur frequently due to the fact that construction machinery spans an adjacent live safety distance, large economic losses are caused, and social influences are severe. Research finds that even if enough safety guardians are deployed on a construction site as required and corresponding monitoring measures are taken, accidents can still not be completely avoided, and the reason is that:
1. the environment of an electric power engineering near a live working construction site is complex, the distance between construction machinery and live equipment and a lead is difficult to measure, a safety guardian and a construction machinery commander judge the near-electric distance of the machinery only by experience, and the construction machinery operator can cause the safety distance between the machinery and a live body to be too small due to slight negligence, so that accidents are caused.
2. The environment of partial transformer substations and lines is complex, the conditions of multi-voltage grade alternation and multi-power supply exist, and after a constructor determines that a certain power supply has power failure, the constructor mistakenly considers that equipment or lines are uncharged, and directly enters a field for electricity testing and construction, so that accidents are caused.
The existing electric power engineering construction safety control means, such as video monitoring, infrared distance measurement, hard fences and the like, cannot solve the problems. And close on electrified safe distance monitoring early warning device through installation induction type on construction machinery, then can solve this problem, but present similar product does not obtain fine application, and its reason mainly lies in: the existing device has a single alarm mode and is difficult to attract the attention of operators in a noisy construction environment; the existing device can only warn a construction machine driver, but cannot be monitored by a safety guardian and a manager; the existing device needs a construction machine operator to manually adjust the voltage level gear, however, the electric power professional foundation of the mechanical operator is weak, the device is difficult to use skillfully, and great resistance is brought to popularization and application of the device.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an induction type near-live safety distance early warning system and a method thereof, which can simultaneously send out warning signals to construction machinery operators, safety guardians and managers and can autonomously identify the voltage level of the position of a working machine, and the system is obviously superior to the prior similar technologies in application scenes and popularization prospects.
In order to achieve the above object, the present invention provides an inductive proximity live safety distance early warning method, which comprises the following steps:
firstly, mounting a near-electric inductor at the end part of an operating machine, positioning an alarm in a mechanical operating room, and presetting a mobile phone number of a safety manager in the alarm;
secondly, detecting the electric field intensity of the end part of the construction machine by the near-electric inductor, identifying the voltage grade, and sending a signal of the electric field intensity and a signal of the voltage grade to an alarm by the near-electric inductor;
step three, presetting electric field intensity threshold values corresponding to all voltage levels in the alarm,
the alarm compares the received signal of the electric field intensity with the electric field intensity threshold value, if the signal of the electric field intensity exceeds the electric field intensity threshold value, the threshold value is judged to be out of limit, the alarm gives out audible and visual alarm and dials or sends a short message to a mobile phone of a safety manager.
Preferentially, in the second step, the capacitive coupling probe array collects the electric field strengths of the upper, lower, left and right directions of the end part of the construction machine, and converts the electric field strengths of the four directions into four micro-voltage signals; the four micro-voltage signals are input to the first singlechip module through the voltage following module and the filtering and amplifying module.
Preferentially, after the filtering and amplifying module filters the four micro-voltage signals, the first single chip microcomputer module receives the four micro-voltage signals, and converts the four micro-voltage signals into four spatial electric field intensities; the single chip microcomputer module further calculates and identifies the four space electric field intensities to obtain a voltage grade and an average electric field intensity, the first single chip microcomputer module outputs the voltage grade and the average electric field intensity to the first wireless transparent transmission module for receiving by the alarm, and the first single chip microcomputer module is communicated with the alarm through the first wireless transparent transmission module.
Preferably, in the third step, the first singlechip module starts to operate after being initialized, the first singlechip module enters a slow scanning mode, the first singlechip module collects data of the capacitive coupling probe array once every 10 seconds, and calculates the average value of the electric field intensity in four directions to obtain the average value E of the electric field intensityavg(ii) a If E isavgThe voltage level and the electric field intensity average value are calculated and obtained when the single chip microcomputer module enters a fast scanning mode when the voltage level is more than or equal to 0.2 kV/m and the duration time exceeds 1 minute, the single chip microcomputer module collects data of the capacitive coupling probe array every 2 seconds; if EavgIf the voltage is less than 0.2 kV/m, the first singlechip module enters a sleep mode, and the first singlechip module stops acquiring data of the capacitive coupling probe array;
if in the fast scan mode, the average value E of the electric field intensity measured in two adjacent timesavgMaking difference to obtain difference value and average value E of electric field intensity of two adjacent timesavgAverage value E of electric field intensity measured in previous timeavgIf the ratio is less than 10% and lasts for 1 minute, the first singlechip module enters a sleep mode, otherwise, the first singlechip module keeps a fast scanning mode, and real-time voltages and the like are carried outTransmitting the data of the level and the average value of the electric field intensity to a first wireless transparent transmission module;
and after the first singlechip module enters a sleep mode, waking up a clock to start timing, and after 1 minute, waking up the first singlechip module and then entering a slow-scanning mode.
Preferably, the first power supply module generates voltages with a plurality of values to supply power to the following module, the filtering and amplifying module, the first wireless transparent transmission module and the first single chip microcomputer module.
Preferentially, the wireless sensor comprises a near electric sensor and an alarm, wherein the near electric sensor comprises a capacitive coupling probe array, a voltage following module, a filtering and amplifying module, a wireless transmission module I, a single chip microcomputer module I and a power supply module I, the capacitive coupling probe array, the voltage following module, the filtering and amplifying module and the single chip microcomputer module I are sequentially and electrically connected, the wireless transmission module I is electrically connected with the single chip microcomputer module I, and the power supply module I is electrically connected with the capacitive coupling probe array, the voltage following module, the filtering and amplifying module, the wireless transmission module I and the single chip microcomputer module I.
Preferentially, the alarm comprises an ultrasonic module, an explosion flash lamp, a wireless transparent transmission module II, a GPRS module, a singlechip module II and a power supply module II, wherein the singlechip module II is electrically connected with the ultrasonic module, the wireless transparent transmission module II, the explosion flash lamp and the GPRS module, and the power supply module II is electrically connected with the singlechip module II, the explosion flash lamp, the ultrasonic module, the wireless transparent transmission module II and the GPRS module. Preferably, the capacitive coupling probe array comprises four capacitive coupling probes, the four capacitive coupling probes comprise a capacitive coupling probe A, a capacitive coupling probe B, a capacitive coupling probe C and a capacitive coupling probe D, the four capacitive coupling probes are arranged in the upper, lower, left and right directions of the single chip microcomputer module I according to the principle of diagonal line equality, the central distance between the capacitive coupling probe A and the capacitive coupling probe C is equal to that between the capacitive coupling probe B and the capacitive coupling probe D, and the central lines of the capacitive coupling probe A and the capacitive coupling probe C are mutually equally divided from the central lines of the capacitive coupling probe B and the capacitive coupling probe D.
Preferentially, the first power supply module comprises a first lithium battery, a first charging module and a first inversion module, wherein an input end of the first lithium battery is electrically connected with the first charging module, an output end of the first lithium battery is electrically connected with the first inversion module, and the first inversion module is electrically connected with the first single chip microcomputer module and the voltage following module.
Preferentially, the second power supply module comprises a second lithium battery, a second charging module and a second inversion module, the second input end of the lithium battery is electrically connected with the second charging module, the second output end of the lithium battery is electrically connected with the second inversion module, and the second inversion module is electrically connected with the second single-chip microcomputer module and the flashing light.
The invention achieves the following beneficial effects:
the invention provides an induction type near live safety distance monitoring and early warning system, which adopts the modes of sound-light alarm and telephone dialing, ensures that construction machinery operators, safety guardians and managers can receive alarm signals when the safety distance of an operating machine is out of limit, and becomes an important means for near live safety control; in addition, the invention adopts a low-power-consumption algorithm, prolongs the standby time of the near-electric inductor, and adopts a capacitive coupling probe array mode to enable the near-electric inductor to be capable of automatically identifying the voltage level of a charged area, thereby being more convenient for mechanical operators, safety guardians and managers to use.
Detailed Description
The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
An induction type near live safety distance early warning method comprises the following steps:
firstly, mounting a near-electric inductor at the end part of an operating machine, positioning an alarm in a mechanical operating room, and presetting a mobile phone number of a safety manager in the alarm;
secondly, detecting the electric field intensity of the end part of the construction machine by the near-electric inductor, identifying the voltage grade, and sending a signal of the electric field intensity and a signal of the voltage grade to an alarm by the near-electric inductor;
step three, presetting electric field intensity threshold values corresponding to all voltage levels in the alarm,
the alarm compares the received signal of the electric field intensity with the electric field intensity threshold value, if the signal of the electric field intensity exceeds the electric field intensity threshold value, the threshold value is judged to be out of limit, the alarm gives out audible and visual alarm and dials or sends a short message to a mobile phone of a safety manager.
Further, in the second step, the capacitive coupling probe array collects the electric field strengths of the upper, lower, left and right directions of the end part of the construction machine, and converts the electric field strengths of the four directions into four micro-voltage signals; the four micro-voltage signals are input to the first singlechip module through the voltage following module and the filtering and amplifying module.
Furthermore, after the filtering and amplifying module filters the four micro-voltage signals, the first single chip microcomputer module receives the four micro-voltage signals and converts the four micro-voltage signals into four spatial electric field intensities; the single chip microcomputer module calculates and identifies four space electric field intensities in a pair to obtain a voltage level and an average electric field intensity, the single chip microcomputer module I outputs the voltage level and the average electric field intensity to the wireless transparent transmission module I for the alarm to receive, and the single chip microcomputer module I is communicated with the alarm through the wireless transparent transmission module I.
Further, in the third step, the first singlechip module adopts a low power consumption algorithm, and the algorithm is as follows: the single chip microcomputer module starts to operate after being initialized, the single chip microcomputer module enters a slow scanning mode, the single chip microcomputer module collects data of the capacitive coupling probe array every 10s, and the electric field intensity in four directions is averaged to obtain an electric field intensity average value Eavg(ii) a If E isavgThe voltage level and the electric field intensity average value are calculated and obtained when the single chip microcomputer module enters a fast scanning mode when the voltage level is more than or equal to 0.2 kV/m and the duration time exceeds 1 minute, the single chip microcomputer module collects data of the capacitive coupling probe array every 2 seconds; if EavgIf the voltage is less than 0.2 kV/m, the single chip module enters a sleep mode, and the single chip moduleThe first block stops acquiring data of the capacitive coupling probe array;
if in the fast scan mode, the average value E of the electric field intensity measured in two adjacent timesavgMaking difference to obtain difference value and average value E of electric field intensity of two adjacent timesavgAverage value E of electric field intensity measured in previous timeavgIf the ratio of the voltage level to the electric field intensity is less than 10% and lasts for 1 minute, the first singlechip module enters a sleep mode, otherwise, the first singlechip module keeps a fast scan mode, and transmits data of the average value of the voltage level and the electric field intensity to the first transparent transmission module in real time;
and after the first singlechip module enters a sleep mode, waking up a clock to start timing, and after 1 minute, waking up the first singlechip module and then entering a slow-scanning mode.
Furthermore, the first power supply module generates voltages with a plurality of values to supply power to the following module, the filtering and amplifying module, the first wireless transparent transmission module and the first single chip microcomputer module.
The near-electric sensor comprises a capacitive coupling probe array, a voltage following module, a filtering amplification module, a wireless transmission module I, a single chip microcomputer module I and a power supply module I, wherein the capacitive coupling probe array, the voltage following module, the filtering amplification module and the single chip microcomputer module I are sequentially electrically connected, the wireless transmission module I is electrically connected with the single chip microcomputer module I, and the power supply module I is electrically connected with the capacitive coupling probe array, the voltage following module, the filtering amplification module, the wireless transmission module I and the single chip microcomputer module I.
Furthermore, the alarm comprises an ultrasonic module, an explosion flash lamp, a wireless transparent transmission module II, a GPRS module, a singlechip module II and a power supply module II, wherein the singlechip module II is electrically connected with the ultrasonic module, the wireless transparent transmission module II, the explosion flash lamp and the GPRS module, and the power supply module II is electrically connected with the singlechip module II, the explosion flash lamp, the ultrasonic module, the wireless transparent transmission module II and the GPRS module. Furthermore, the capacitive coupling probe array comprises four capacitive coupling probes, the four capacitive coupling probes comprise a capacitive coupling probe A, a capacitive coupling probe B, a capacitive coupling probe C and a capacitive coupling probe D, the four capacitive coupling probes are arranged in the upper, lower, left and right directions of the single chip microcomputer module I according to the principle of diagonal line equality, the central distance between the capacitive coupling probe A and the capacitive coupling probe C is equal to that between the capacitive coupling probe B and the capacitive coupling probe D, and the central lines of the capacitive coupling probe A and the capacitive coupling probe C are mutually equally divided from the central lines of the capacitive coupling probe B and the capacitive coupling probe D.
Furthermore, the power supply module I comprises a first lithium battery, a first charging module and a first inversion module, wherein an input end of the first lithium battery is electrically connected with the first charging module, an output end of the first lithium battery is electrically connected with the first inversion module, and the first inversion module is electrically connected with the first single chip microcomputer module and the voltage following module.
Furthermore, the power supply module II comprises a lithium battery II, a charging module II and an inversion module II, the input end of the lithium battery II is electrically connected with the charging module II, the output end of the lithium battery II is electrically connected with the inversion module II, and the inversion module II is electrically connected with the singlechip module II and the flashing light.
Charging module one in this device, charging module two, contravariant module one, contravariant module two, the ultrasonic wave module, explode the flashing light, capacitive coupling probe array, the voltage follows the module, the filtering amplification module, single chip module one, single chip module two, wireless module one of passing through, wireless module two of passing through, nearly electric inductor, the alarm, the GPRS module, lithium cell one, lithium cell two and cell phone terminal, the model that can adopt in prior art is many, technical personnel in the field can choose suitable model for use according to actual demand, this embodiment is no longer the one-by-one example.
The end of the working machine may be a lifting hook of a crane or a basket mounted on a lifting rope of a crane, and the end of the working machine is a part to be constructed by a person skilled in the art.
As shown in fig. 1, the induction type near live safety work early warning system provided by the invention comprises a near electric inductor, an alarm and a mobile phone terminal, and the working principle is as follows: the near-electric sensor is arranged at the end part of the operation machine, the alarm is placed in a mechanical operation room, and the mobile phone is used as a safety guardian and a manager; the near-electric inductor detects the electric field intensity of the end part of the construction machine through electromagnetic induction, analyzes and identifies data, and sends signals of the electric field intensity, the voltage level and the like to the alarm; the alarm is combined with the received voltage level and the electric field intensity and compared with a preset threshold value, so that whether the threshold is out of limit or not is judged; if the alarm is out of limit, the alarm gives out sound and light alarm, and simultaneously dials the mobile phone of the preset safety manager, and the mobile phone receives a remote alarm call.
As shown in fig. 2, the working principle of the near-electric inductor is as follows: the capacitive coupling probe array collects the spatial electric field intensity of the near-electric inductor in four directions, namely the upper direction, the lower direction, the left direction and the right direction, and converts the spatial electric field intensity into four micro-voltage signals; four micro-voltage signals are input to the first singlechip module through the four voltage following modules and the four filtering and amplifying modules so as to eliminate high-frequency interference; the single chip microcomputer module receives the four voltage signals, further filters the four voltage signals through a software algorithm, and converts the four voltage signals into four spatial electric field intensity data; the single chip microcomputer module carries out further operation and identification on the four space electric field intensity data to obtain voltage grade and average electric field intensity data, and the single chip microcomputer module outputs the voltage grade and the average electric field intensity data to the wireless transparent transmission module for the alarm to receive. The lithium battery generates a plurality of voltages with the same numerical value once through the inversion module to supply power to the following module, the filtering and amplifying module, the wireless transparent transmission module I and the single chip microcomputer module I; the first lithium battery is charged through the first charging module through an external power supply.
As shown in fig. 2, the capacitive coupling probe array is composed of four capacitive coupling probes, and the array is distributed according to the principle of equal diagonal lines and is divided into four positions, namely, the center distance between the probe a and the probe C is equal to the center distance between the probe B and the probe D, and the center lines of the probe a, the probe C, the probe B and the probe D are equally divided. Through the electric field intensity difference at the positions of the four probes and the diagonal distance of the four probes, the range of the voltage value of the unknown high-voltage source outside can be obtained through reverse estimation, and the voltage level of the high-voltage source of the working machine can be further determined.
As shown in FIG. 3, since the near-electric sensor is installed at the end of the working machine, the near-electric sensor cannot be charged by external wires in time, and the standby time of the near-electric sensor is prolongedThe chip machine module I carries a low-power-consumption algorithm, and the working process of the low-power-consumption algorithm is as follows: the single chip microcomputer module is initialized, starts to operate, enters a slow scanning mode, collects probe array data every 10s, and calculates the average value E of the electric field intensityavg(ii) a If E is obtainedavgIf the voltage is more than or equal to 0.2 kV/m and the voltage lasts for 1 minute, the single chip microcomputer module enters a 'fast scanning mode', starts to collect probe array data every 2 seconds, and calculates the voltage grade and the average electric field intensity; otherwise, the first singlechip module enters a sleep mode, namely the first singlechip module closes all peripheral circuits and stops the running of all acquisition and operation programs. If in the fast scan mode, the average value E of the electric field intensity measured in two adjacent timesavgMaking difference to obtain difference value and average value E of electric field intensity of two adjacent timesavgAverage value E of electric field intensity measured in previous timeavgIf the ratio of the voltage level to the electric field intensity is less than 10% and lasts for 1 minute, the first singlechip module also enters a sleep mode, otherwise, the first singlechip module transmits the data of the average value of the voltage level and the electric field intensity to the first transparent transmission module. And after the first singlechip module enters a sleep mode, waking up a clock to start timing, and after 1 minute, waking up the first singlechip module and then entering a slow-scanning mode.
As shown in fig. 4, the second lithium battery generates voltages with different magnitudes through the second inverter module to be used by each module; when the second lithium battery feeds electricity, the second lithium battery can be charged through the charging module by an external power supply. The working principle of the background relay is as follows: the wireless transparent transmission module II receives the data sent by the near-electric sensor and transmits the data to the singlechip module II; the second singlechip module is preset with an electric field intensity threshold corresponding to each voltage grade, the second singlechip module is used for judging according to the received voltage grade and the average electric field intensity, and if the threshold is out of limit, the second singlechip module triggers the ultrasonic module and the flashing lamp to act through pins to start acousto-optic alarm; meanwhile, the GPRS module receives a trigger instruction sent by the singlechip module II and dials a preset mobile phone number for warning.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.