CN113516827A - Early warning device and method for working vehicle approaching line - Google Patents
Early warning device and method for working vehicle approaching line Download PDFInfo
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- CN113516827A CN113516827A CN202110449309.9A CN202110449309A CN113516827A CN 113516827 A CN113516827 A CN 113516827A CN 202110449309 A CN202110449309 A CN 202110449309A CN 113516827 A CN113516827 A CN 113516827A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0236—Threshold setting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/155—Indicating the presence of voltage
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/028—Communication between parent and child units via remote transmission means, e.g. satellite network
Abstract
The invention relates to an early warning device and method for an adjacent line of a working vehicle, which comprises the following steps: the pre-judging module 1, the communication module 2 and the alarm module 3 are arranged at the front end of the boom of the working vehicle; the prejudgment module 1 comprises: the induction electrode 11, the signal conditioning circuit 12 and the signal processing circuit 13; the signal conditioning circuit 12 is configured to convert the induced charge generated on the induction electrode into a voltage signal in real time; the signal processing circuit 13 is used for giving an early warning instruction when the voltage signal output by the signal conditioning circuit reaches a pre-judgment condition; the communication module 2 is used for transmitting the early warning instruction sent by the signal processing circuit to the alarm module in a wireless transmission mode; and the alarm module 3 is used for sending out an alarm signal when receiving the early warning instruction. According to the invention, the induction electrode 11 is adopted to obtain the voltage signal approaching the transmission conductor, and early warning is given when the voltage signal passes through the zero point for the first time, so that the events of electric shock and injury to constructors and the like are avoided, and the safety of field operation machinery and personnel is ensured.
Description
Technical Field
The invention relates to the technical field of power transmission line monitoring and operation safety protection, in particular to an early warning device and method for an operation vehicle approaching line.
Background
The expansion of city scale and the accelerated implementation of capital construction projects lead to the line corridors which are originally far away from urban areas to become hot construction areas. When large-scale engineering machinery such as a crane and the like is constructed below a route corridor, on-site safety work specifications are often overlooked due to reasons such as construction period and the like, and safe construction distance is crossed, so that the machinery touches a power transmission line, line tripping, short circuit, wire damage and the like are caused, and even accidents such as field personnel electric shock and death occur.
The frequent occurrence of the line external damage accidents seriously affects the life safety of a power grid and field constructors, the external damage becomes one of main factors affecting the safe and reliable operation of a power transmission line, and the statistical data shows that the proportion of the power grid accidents caused by the external damage accounts for about 30 percent of the total number of line faults, wherein the faults caused by the large-scale mechanical illegal operation account for about 60 percent of the total number of the external damage. Therefore, the construction monitoring of large machines in the line corridor should become a key target for attention and precaution.
At present, the external force damage still depends on manual patrol, and the perception means is deficient. In the aspect of monitoring means, generally adopted measures are divided into two types, firstly, workers regularly patrol the line, mark a protection area range, hang a safety warning board, perform safety training on operators on a construction site and the like, and the method has the problems of large personnel demand, high labor cost, incapability of supervision of the personnel and the like. Secondly, the network cameras are arranged on the site, the video data are transmitted back to the monitoring center in real time through means such as 3G/4G/5G, and the like, and the workers judge the external damage accidents through real-time watching or image processing algorithms and the like.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a work vehicle approach line early warning device, which comprises:
the system comprises a pre-judging module 1 and a communication module 2 which are arranged at the front end of a boom of the working vehicle, and an alarm module 3 which is arranged in an operator operating room on the working vehicle;
the prejudgment module 1 includes: the induction electrode 11, the signal conditioning circuit 12 and the signal processing circuit 13;
the signal conditioning circuit 12 is configured to convert the induced charges generated on the induction electrode 11 into a voltage signal in real time;
the signal processing circuit 13 is configured to give an early warning instruction when the voltage signal output by the signal conditioning circuit 12 reaches a predetermined condition;
the communication module 2 is used for transmitting an early warning instruction sent by the signal processing circuit 13 to the alarm module 3 in a wireless transmission mode;
and the alarm module 3 is used for sending out an alarm signal when receiving the early warning instruction.
Preferably, the signal conditioning circuit 12 includes: a sampling resistor 121, and a differential amplifier 122, a first amplification circuit 123, and a second amplification circuit 124 connected in this order;
one end of the sampling resistor 121 is grounded, and the other end is connected with the sensing electrode 11;
the second amplifying circuit 124 is connected with the signal processing circuit 13;
the differential amplifier 122 is configured to amplify a voltage difference across the sampling resistor 121.
Preferably, the signal processing circuit 13 includes: the filter circuit, the AD conversion circuit and the microprocessor are connected in sequence;
the filter circuit is connected with the signal conditioning circuit 12;
the microprocessor is used for monitoring the voltage waveform output by the AD conversion circuit in real time and sending an early warning instruction to the communication module 2 when the voltage waveform reaches a pre-judging condition.
Preferably, the predetermined condition is:
after filtering and AD conversion, the voltage signal amplitude passes through 0 point for the first time.
Preferably, the prejudgment module 1, the communication module 2 and the alarm module 3 are all powered by batteries;
the communication module 2 utilizes an antenna 21 to perform wireless transmission;
the alarm signal comprises an acoustic alarm signal and an optical alarm signal.
Preferably, the sensing electrode 11 is formed by bonding a high-conductivity metal and a high-resistance nonmetal.
Preferably, the high-conductivity metal in the sensing electrode 11 is copper, and the high-resistance nonmetal is polytetrafluoroethylene.
Furthermore, the sampling resistor 121 is made of a glass glaze resistor with a resistance value of 10G Ω -1T Ω;
the differential amplifier 122 selects AD 620;
the first amplification circuit 123 and the second amplification circuit 124 have the same amplification factor, and the gain is 200-300 times.
Further, the cut-off frequency of the filter circuit is 100 Hz.
Based on the same invention concept, the invention also provides an early warning method for the approach route of the working vehicle, which comprises the following steps:
a signal conditioning circuit 12 in the prejudgment module 1 converts the induced charges generated on the induction electrode 11 in the prejudgment module 1 into voltage signals;
when the voltage signal output by the signal conditioning circuit 12 reaches the pre-judgment condition, the signal processing circuit 13 in the pre-judgment module 1 gives an early warning instruction;
the communication module 2 transmits the early warning instruction sent by the signal processing circuit 13 to the alarm module 3 in a wireless transmission mode;
and the alarm module 3 sends out an alarm signal when receiving the early warning instruction.
Further, the predetermined condition is:
after filtering and AD conversion, the voltage signal amplitude passes through 0 point for the first time.
Compared with the closest prior art, the invention has the following beneficial effects:
the invention provides an early warning device and method for an adjacent line of an operating vehicle, which comprises the following steps: the system comprises a pre-judging module 1 and a communication module 2 which are arranged at the front end of a boom of the working vehicle, and an alarm module 3 which is arranged in an operator operating room on the working vehicle; the prejudgment module 1 includes: the induction electrode 11, the signal conditioning circuit 12 and the signal processing circuit 13; the signal conditioning circuit 12 is configured to convert the induced charges generated on the induction electrode 11 into a voltage signal in real time; the signal processing circuit 13 is configured to give an early warning instruction when the voltage signal output by the signal conditioning circuit 12 reaches a predetermined condition; the communication module 2 is used for transmitting an early warning instruction sent by the signal processing circuit 13 to the alarm module 3 in a wireless transmission mode; and the alarm module 3 is used for sending out an alarm signal when receiving the early warning instruction. According to the technical scheme provided by the invention, the induction electrode 11 is adopted to obtain the voltage signal approaching the power transmission conductor, and early warning is given when the voltage signal passes through the zero point for the first time, so that the events of electric shock and injury to constructors and the like are avoided, and the safety of field operation machinery and personnel is guaranteed.
Drawings
Fig. 1 is a structural diagram of an early warning device for an adjacent line of a working vehicle according to the present invention;
FIG. 2 is a schematic diagram illustrating the layout of a pre-judging module in the embodiment of the present invention;
FIG. 3 is a cross-sectional view of a pre-determination module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an inductive electrode and signal conditioning circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a voltage signal waveform according to an embodiment of the present invention;
fig. 6 is a flowchart of an early warning method for an adjacent route of a work vehicle according to the present invention.
Reference numerals:
1. a prejudgment module; 2. a communication module; 3. an alarm module; 11. an induction electrode; 12. a signal conditioning circuit; 13. a signal processing circuit; 14. a battery; 121. sampling a resistor; 122. a differential amplifier; 123. a first amplifying circuit; 124. a second amplifying circuit; 21. an antenna.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a work vehicle approach line early warning device, as shown in fig. 1, comprising: the system comprises a pre-judging module 1 arranged at the front end of a boom of an operation vehicle, a communication module 2 and an alarm module 3 arranged in an operation room of an operator;
the layout schematic diagram of the pre-judging module 1 is shown in fig. 2, and the internal cross-sectional diagram of the pre-judging module 1 is shown in fig. 3;
the prejudgment module 1 comprises: the induction electrode 11, the signal conditioning circuit 12, the signal processing circuit 13 and the battery 14;
the signal conditioning circuit 12 is configured to convert the induced charge generated on the induction electrode 11 into a voltage signal in real time, and amplify the voltage signal;
as can be seen from the schematic diagram of the operation principle of the sensing electrode 11 and the signal conditioning circuit 12 shown in fig. 4, the signal conditioning circuit 12 is composed of a sampling resistor 121, a differential amplifier 122, a first amplifying circuit 123, and a second amplifying circuit 124.
The sensing electrode 11 is grounded through the sampling resistor 121, when the sensing electrode 11 approaches a power line, an electric field generated by the power line may cause an induced charge to appear on the sensing electrode 11, the induced charge flows into the ground through the sampling resistor 121, an induced current flowing through the sampling resistor 121 is generated, and a voltage difference is generated between two ends of the sampling resistor 121.
The differential amplifier 122 amplifies the voltage difference between the two ends of the sampling resistor 121, and transmits the voltage difference to the first amplifying circuit 123 for primary amplification, and then the voltage signal is subjected to secondary amplification by the second amplifying circuit 124, and the voltage signal after the secondary amplification is output to the signal processing circuit 13;
the signal processing circuit 13 is configured to give an early warning instruction when the voltage signal output by the signal conditioning circuit 12 reaches a predetermined condition;
a signal processing circuit 13, comprising: the device comprises a filter circuit, an AD conversion circuit and a microprocessor;
the filter circuit performs low-pass filtering on the signal to remove high-frequency noise interference;
the AD conversion circuit converts the analog voltage signal output by the filter circuit into a digital signal and transmits the digital signal to the microprocessor;
the microprocessor monitors the amplitude of the voltage signal in real time, judges the amplitude and gives an early warning instruction when the signal passes through a 0 point for the first time; for example, a voltage curve graph obtained when the voltage signal is close to a 220kV lead as shown in fig. 5 is used, when the voltage signal passes through a 0 point (the 0 point is a device alarm threshold point) for the first time at 2.5S, the microprocessor sends out an early warning instruction;
the battery 14 supplies power to the signal conditioning circuit 12 and the signal processing circuit 13.
In addition, the communication module 2 is used for transmitting an early warning instruction sent by the signal processing circuit 13 to the alarm module 3 in a wireless transmission mode;
the communication module 2 can use the antenna 21 to perform wireless transmission;
in addition, the alarm module 3 is used for sending out an alarm signal when receiving the early warning instruction.
The alarm signal comprises a sound early warning and a light early warning to prompt an operator to stop working, and the operating arm is operated to be away from the power transmission conductor as soon as possible;
in order to make the effect of the early warning device better, equipment in the early warning device gives the following types;
the high-conductivity metal in the induction electrode 11 is preferably copper, and the high-resistance nonmetal is preferably polytetrafluoroethylene;
the sampling resistor 121 in the signal conditioning circuit 12 is preferably a glass glaze resistor, and the resistance value can be selected from 10G omega to 1T omega;
the differential amplifier 122 in the signal conditioning circuit 12 is preferably an AD 620;
the first amplifying circuit 123 and the second amplifying circuit 124 have the same amplification factor, the gain is 200-300 times, and the first amplifying circuit and the second amplifying circuit have the same amplification parameters, bandwidth and the like, and preferably select an OPA 277;
the cut-off frequency of the filter circuit is 100 Hz.
Example 2:
the invention provides a method for early warning an adjacent line of a working vehicle, which comprises the following steps of:
step s1, the signal conditioning circuit 12 in the pre-judging module 1 converts the induced charges generated on the induction electrode 11 in the pre-judging module 1 into voltage signals;
step s2, when the voltage signal output by the signal conditioning circuit 12 reaches the pre-judging condition, the signal processing circuit 13 in the pre-judging module 1 gives an early warning instruction;
step s3, the communication module 2 transmits the early warning instruction sent by the signal processing circuit 13 to the alarm module 3 in a wireless transmission mode;
and step s4, the alarm module 3 sends out an alarm signal when receiving the early warning instruction.
Specifically, the pre-judging condition is as follows:
after filtering and AD conversion, the voltage signal amplitude passes through 0 point for the first time.
In step S1, the sensing electrode 11 generates a sensing charge when approaching the power transmission line, and because the sensing electrode 11 is grounded through the sampling resistor 121, the sensing charge flows into the ground through the sampling resistor 121, so as to generate a sensing current flowing through the sampling resistor 121, and generate a voltage difference across the sampling resistor 121;
the voltage difference is amplified by the differential amplifier 122, and then amplified by the first amplifying circuit 123 and the second amplifying circuit 124, and the obtained voltage signal is output to the signal processing circuit 13;
in step S2, the filter circuit performs low-pass filtering on the voltage signal to remove high-frequency noise and improve signal-to-noise ratio;
the AD conversion circuit converts the analog voltage signal output by the filter circuit into a digital signal and transmits the digital signal to the microprocessor;
the microprocessor monitors the amplitude of the voltage signal in real time, judges the amplitude and gives an early warning instruction when the signal passes through a 0 point for the first time;
the induced current is the differential of the induced charge, the induced charge quantity is in direct proportion to the field intensity, so the induced current is in direct proportion to the field intensity variation, when the front end of the suspension arm approaches to the power transmission line, the field intensity variation at the nearest point of the power transmission line is the largest, so the induced current generates the largest variation at the position, and when the front end of the suspension arm is far away, the field intensity direction is changed, so the point 0 is the nearest point of the power transmission line.
The warning in step S2 includes a light warning and a sound warning, and step S3 is to prompt the operator to stop the operation in a warning manner, and operate the work arm to move away from the power transmission line as soon as possible.
According to the technical scheme provided by the invention, the induction electrode 11 is adopted to obtain the voltage signal when approaching the power transmission lead, and early warning is given based on the voltage signal, the mode has the characteristics of all weather, no directivity, high detection precision and the like, and the early warning can be given reliably and effectively when the distance between the suspension arm of the operation vehicle and the power transmission lead exceeds a safe distance, so that the safety of field operation machinery and personnel is guaranteed.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (11)
1. An early warning device for an approaching route of a working vehicle, the device comprising: the device comprises a pre-judging module (1) and a communication module (2) which are arranged at the front end of a boom of the working vehicle, and an alarm module (3) which is arranged in an operating room of an operator on the working vehicle;
the prejudgment module (1) comprises: the device comprises an induction electrode (11), a signal conditioning circuit (12) and a signal processing circuit (13);
the signal conditioning circuit (12) is used for converting the induced charges generated on the induction electrode (11) into voltage signals in real time;
the signal processing circuit (13) is used for giving an early warning instruction when the voltage signal output by the signal conditioning circuit (12) reaches a pre-judgment condition;
the communication module (2) is used for transmitting an early warning instruction sent by the signal processing circuit (13) to the alarm module (3) in a wireless transmission mode;
and the alarm module (3) is used for sending out an alarm signal when receiving the early warning instruction.
2. The apparatus of claim 1, wherein the signal conditioning circuit (12) comprises: a sampling resistor (121), and a differential amplifier (122), a first amplification circuit (123) and a second amplification circuit (124) which are connected in sequence;
one end of the sampling resistor (121) is grounded, and the other end of the sampling resistor is connected with the induction electrode (11);
the second amplifying circuit (124) is connected with the signal processing circuit (13);
the differential amplifier (122) is used for amplifying the voltage difference between two ends of the sampling resistor (121).
3. The apparatus of claim 1, wherein the signal processing circuit (13) comprises: the filter circuit, the AD conversion circuit and the microprocessor are connected in sequence;
the filter circuit is connected with the signal conditioning circuit (12);
the microprocessor is used for monitoring the voltage waveform output by the AD conversion circuit in real time and sending an early warning instruction to the communication module (2) when the voltage waveform reaches a pre-judging condition.
4. The apparatus of claim 1, wherein the prequalification is:
after filtering and AD conversion, the voltage signal amplitude passes through 0 point for the first time.
5. The device according to claim 1, characterized in that the anticipation module (1), the communication module (2) and the alarm module (3) are all powered by a battery;
the communication module (2) utilizes an antenna (21) to carry out wireless transmission;
the alarm signal comprises an acoustic alarm signal and an optical alarm signal.
6. The device according to claim 1, characterized in that the sensing electrode (11) is made of a highly conductive metal and a highly resistive non-metal bonded together.
7. The device according to claim 1, characterized in that the highly conductive metal of the induction electrode (11) is selected from copper and the highly resistive non-metallic material is selected from polytetrafluoroethylene.
8. The device according to claim 2, wherein the sampling resistor (121) is a glass glaze resistor with a resistance value of 10G Ω -1T Ω;
the differential amplifier (122) selects AD 620;
the first amplification circuit (123) and the second amplification circuit (124) have the same amplification factor, and the gain is 200-300 times.
9. The apparatus of claim 3, wherein the filter circuit has a cutoff frequency of 100 Hz.
10. A warning method of a work vehicle approach line warning apparatus as claimed in any one of claims 1 to 9, the method comprising:
a signal conditioning circuit (12) in the prejudgment module (1) converts the induced charges generated on an induction electrode (11) in the prejudgment module (1) into voltage signals;
when the voltage signal output by the signal conditioning circuit (12) reaches a pre-judgment condition, a signal processing circuit (13) in the pre-judgment module (1) gives an early warning instruction;
the communication module (2) transmits an early warning instruction sent by the signal processing circuit (13) to the alarm module (3) in a wireless transmission mode;
the alarm module (3) sends out an alarm signal when receiving the early warning instruction.
11. The method of claim 10, wherein the prequalification is:
after filtering and AD conversion, the voltage signal amplitude passes through 0 point for the first time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110449309.9A CN113516827A (en) | 2021-04-25 | 2021-04-25 | Early warning device and method for working vehicle approaching line |
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| CN202110449309.9A CN113516827A (en) | 2021-04-25 | 2021-04-25 | Early warning device and method for working vehicle approaching line |
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| CN113516827A true CN113516827A (en) | 2021-10-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115893197A (en) * | 2022-09-07 | 2023-04-04 | 杭州搏元信息技术有限公司 | Electric shock prevention early warning device for operation close to electrified body |
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2021
- 2021-04-25 CN CN202110449309.9A patent/CN113516827A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115893197A (en) * | 2022-09-07 | 2023-04-04 | 杭州搏元信息技术有限公司 | Electric shock prevention early warning device for operation close to electrified body |
| CN115893197B (en) * | 2022-09-07 | 2024-02-20 | 山西恩辉电力工程有限公司 | Electric shock prevention early warning device for operation of nearby live body |
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