CN113538821A - External damage prevention alarm device and method for cable - Google Patents
External damage prevention alarm device and method for cable Download PDFInfo
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- CN113538821A CN113538821A CN202110858298.XA CN202110858298A CN113538821A CN 113538821 A CN113538821 A CN 113538821A CN 202110858298 A CN202110858298 A CN 202110858298A CN 113538821 A CN113538821 A CN 113538821A
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- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
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Abstract
The invention discloses a cable external damage prevention alarm device and a method, wherein the cable external damage prevention alarm device comprises: the magnetic induction detection module is arranged on a construction appliance and used for detecting the relative distance between a cable and the construction appliance along with the construction appliance extending into the ground, and generating an alarm signal according to the relative distance; the alarm module is in communication connection with the magnetic induction detection module and used for sending out an alarm according to the alarm signal. The scheme of the invention realizes the real-time accurate calculation of the relative distance between the construction appliance and the cable, prevents the cable from being cut carelessly in the construction process, and improves the safety of the construction process.
Description
Technical Field
The embodiment of the invention relates to the power system monitoring technology, in particular to a cable external force damage prevention alarm device and method.
Background
With the acceleration of the urbanization construction process, more and more towns develop the infrastructure work such as road improvement, expansion or dredging and discharging pipes.
High-voltage cable lines are laid below many urban roads, and due to the fact that cables are buried underground, specific positions are difficult to determine, and due to the fact that constructors have insufficient consciousness on protecting electric power facilities and safety consciousness, casualties, power supply interruption or other similar electric power safety production accidents caused by the fact that the cables are damaged by external force often occur.
At present, cable detection is realized by a professional technician carrying cable detection equipment to roughly detect the position of a cable, a constructor is informed to operate after a responsible person is informed, construction operation and detection cannot be carried out synchronously, the condition that information is asymmetrical between the responsible person and an actual operator at the bottom of the cable position is existed, and the safety is low.
Disclosure of Invention
The invention provides a cable external damage prevention alarm device and method, which are used for realizing real-time accurate calculation of the relative distance between a construction appliance and a cable and improving the safety of a construction process.
In a first aspect, an embodiment of the present invention provides an external force damage prevention alarm device for a cable, where the external force damage prevention alarm device for a cable includes: the magnetic induction detection module is arranged on a construction appliance and used for detecting the relative distance between a cable and the construction appliance along with the construction appliance extending into the ground, and generating an alarm signal according to the relative distance; the alarm module is in communication connection with the magnetic induction detection module and used for sending out an alarm according to the alarm signal.
Optionally, the magnetic induction detection module further includes: the device comprises a transmitting unit, a measuring unit and a processing unit, wherein the transmitting unit is used for generating a changing magnetic field around the construction appliance and enabling a cable in the changing magnetic field to generate induction current; the measuring unit is used for measuring the magnetic field intensity of a secondary magnetic field generated by the induced current; the processing unit is connected with the measuring unit and used for judging the relative distance between the cable and the construction appliance according to the magnetic field intensity of the secondary magnetic field and generating an alarm signal according to the relative distance.
Optionally, the transmitting unit comprises: a coil for generating a varying magnetic field signal and a first signal amplifier; the first signal amplifier is connected with the coil and used for amplifying the magnetic field signal.
Optionally, the measurement unit comprises: the magnetic field sensor is used for detecting the magnetic field intensity of the secondary magnetic field and generating a field intensity signal; the second signal amplifier is connected with the magnetic field sensor and used for amplifying the field intensity signal.
Optionally, the processing unit comprises: the analog-to-digital converter is connected with the measuring unit and is used for performing analog-to-digital conversion on the field intensity signal; the central processing unit is connected with the analog-to-digital converter and used for calculating the relative distance according to the field intensity signal, further judging the relative relation between the relative distance and a preset distance and generating the alarm signal according to the relative relation; the signal emitter is connected with the central processing unit and used for emitting the alarm signal.
Optionally, the signal transmitter is a bluetooth signal transmitter.
Optionally, the alarm module includes a signal receiver, a signal processor and a speaker, and the signal receiver is configured to receive the alarm signal sent by the signal transmitter; the signal processor is connected with the signal receiver and used for analyzing the alarm signal; the loudspeaker is connected with the signal processor and used for giving an alarm and broadcasting the relative distance.
In a second aspect, an embodiment of the present invention further provides a cable external damage prevention alarm method, which is implemented by using any of the foregoing cable external damage prevention alarm devices, and the cable external damage prevention alarm method includes:
the magnetic induction detection module detects the relative distance between the cable and the construction tool and generates an alarm signal according to the relative distance;
and the alarm module gives an alarm according to the alarm signal.
Optionally, the magnetic induction detection module detects a relative distance between the cable and the construction equipment and generates an alarm signal according to the relative distance, including:
the transmitting unit generates a changing magnetic field around the construction tool, so that the cable in the changing magnetic field generates an induced current;
the measuring unit measures the magnetic field intensity of a secondary magnetic field generated by the induced current;
and the processing unit judges the relative distance between the cable and the construction appliance according to the magnetic field intensity of the secondary magnetic field and generates an alarm signal according to the relative distance.
Optionally, the determining a relative distance between the cable and the construction equipment according to the magnetic field strength of the secondary magnetic field, and generating an alarm signal according to the relative distance includes:
the analog-to-digital converter performs analog-to-digital conversion on the signal of the magnetic field intensity;
the central processing unit calculates the relative distance according to the signal of the magnetic field intensity, further judges the relative relation between the relative distance and a preset distance, and generates the alarm signal according to the relative relation;
and the signal transmitter sends the alarm signal.
According to the alarm device and method for preventing the external force damage of the cable, the transmitting unit can generate a changing magnetic field around the construction appliance, so that the cable in the changing magnetic field generates induction current, the measuring unit can measure the field intensity of a secondary magnetic field generated by the induction current, the processing unit can calculate the relative distance between the cable and the construction appliance according to the field intensity of the secondary magnetic field and then generate an alarm signal, the real-time accurate calculation of the relative distance between the construction appliance and the cable is realized, the situation that the cable is inadvertently cut off in the construction process is prevented, and the safety of the construction process is improved.
Drawings
Fig. 1 is a schematic structural diagram of a cable external damage prevention alarm device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another cable external damage prevention alarm device provided in the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another cable external damage prevention alarm device according to an embodiment of the present invention;
FIG. 4 is a flowchart of a cable external damage prevention alarm method according to an embodiment of the present invention;
FIG. 5 is a flow chart of another cable external damage prevention alarm method according to an embodiment of the present invention;
fig. 6 is a flowchart of another cable external damage prevention alarm method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The embodiment of the invention provides an external force damage prevention alarm device for a cable. Fig. 1 is a schematic structural diagram of a cable external damage prevention alarm device according to an embodiment of the present invention, and referring to fig. 1, the cable external damage prevention alarm device 100 includes: the system comprises a magnetic induction detection module 101 and an alarm module 102, wherein the magnetic induction detection module 101 is arranged on a construction appliance and used for detecting the relative distance between a cable and the construction appliance along with the underground penetration of the construction appliance and generating an alarm signal according to the relative distance based on electromagnetic induction; the alarm module 102 is in communication connection with the magnetic induction detection module 101, and is configured to issue an alarm according to the alarm signal.
Specifically, the magnetic induction detection module 101 may generate an electromagnetic field in a surrounding space, so that an induced current is generated on a cable in the electromagnetic field, the induced current may generate a secondary magnetic field around the cable in a flowing process, the magnetic induction detection module 101 may determine a relative distance between the construction tool and the cable according to a change condition of the secondary magnetic field in a unit time, and determine whether the relative distance is smaller than a preset distance, and if the relative distance is smaller than the preset distance, generate an alarm signal and send the alarm signal to the alarm module 102. The alarm module 102 generates an alarm based on the alarm signal.
For example, when the excavator is used for excavating at a position where a cable is buried, a power grid operation and maintenance worker fixes the magnetic induction detection module 101 at a bucket of the excavator, and the magnetic induction detection module 101 is detected to the ground along with the bucket to perform an excavation operation. In the operation process, the magnetic induction detection module 101 generates an electromagnetic field in the surrounding space and causes the cable in the electromagnetic field to generate an induced current, the induced current can generate a secondary electromagnetic field around the cable, the magnetic induction detection module 101 measures the field intensity of the secondary electromagnetic field in real time and calculates the relative distance between the cable and the construction tool according to the field intensity of the secondary electromagnetic field, and then generates an alarm signal according to the relative distance and sends the alarm signal to the alarm module 102. The alarm module 102 is disposed near the constructor, and the alarm module 102 gives an alarm in real time according to the alarm signal, wherein the alarm may be a "drop" sound in which the sound frequency is proportional to the relative distance. In the whole construction process, a constructor can know the relative distance between the cable and the bucket in real time according to the frequency of the alarm sound, so that the operation range of the bucket is controlled in a standard mode.
The external damage alarm device is prevented to cable that this embodiment provided is provided with magnetic induction detection module, can be based on the relative distance between electromagnetic induction real-time detection cable and the construction apparatus, and generate alarm signal according to the relative distance and remind the site operation personnel, the problem of information asymmetry between the leading person of having the charge and the actual operation personnel at the end of the business has been solved, the relative distance between real-time supervision construction apparatus and the cable has been realized, prevent that the condition of digging the disconnected cable carelessly takes place in the work progress, the security of work progress has been improved.
Fig. 2 is a schematic structural diagram of another cable external force damage prevention alarm device provided in an embodiment of the present invention, and referring to fig. 2, optionally, the magnetic induction detection module 101 further includes: the system comprises a transmitting unit 201, a measuring unit 202 and a processing unit 203, wherein the transmitting unit 201 is used for generating a changing magnetic field around a construction appliance and enabling a cable in the changing magnetic field to generate induction current; the measuring unit 202 is used for measuring the magnetic field intensity of a secondary magnetic field generated by the induced current; the processing unit 203 is connected with the measuring unit 202 and is used for judging the relative distance between the cable and the construction equipment according to the magnetic field intensity of the secondary magnetic field and generating an alarm signal according to the relative distance.
Specifically, the transmitting unit may include a coil 204 and a first signal amplifier 205, where a magnetic field signal that changes when a current passes through the coil 204 may be generated, and the first signal amplifier 205 is connected to the coil 204 and configured to amplify the magnetic field signal. The transmitting unit 201 may generate a magnetic field in the space around the magnetic induction detection module 101 by using the coil 204 and the first signal amplifier 205, and cause an induced current to be generated in the cable in the magnetic field, and the induced current may form a secondary magnetic field around the cable. The induced current I in the cable conforms to a first formula
Wherein, Delta B1Where t is the amount of field strength change of the magnetic field signal generated by the coil 204 per unit time, and R is the resistance value per unit length of the cable. The measurement unit 202 comprises a magnetic field sensor 206 and a second signal amplifier 207, the magnetic field sensor 206 may detect the magnetic field strength of the secondary magnetic field and generate a field strength signal, and the second signal amplifier 207 may amplify the field strength signal and send to the processing unit 203. The processing unit 203 comprises an analog-to-digital converter 208, a central processing unit 209 and a signal transmitter 210, wherein the analog-to-digital converter 208 is connected to the measuring unit 202 and can convert the field strength signal from an analog quantity to a digital quantity. The central processing unit 209 can be based on digital quantitiesThe relative distance between the cable and the construction appliance is calculated by the field intensity signal and a second formula, so that the relative relation between the relative distance and the preset distance can be judged, and an alarm signal is generated according to the relative relation, wherein the second formula is
Wherein, mu0And mu1Magnetic permeability of vacuum and relative magnetic permeability of ring, B2The field strength of the secondary magnetic field is I is the induced current in the cable, and the induced current I in the cable can be calculated by a first formula
Wherein, Delta B1Where/[ delta ] t is the field strength variation of the magnetic field signal generated by the coil per unit time, and R is the resistance value of the cable per unit length. The signal transmitter 210 is connected to the central processing unit 209, and can transmit the alarm signal to the alarm module by wireless transmission or wired transmission.
For example, when the excavator is used for excavating at a position where a cable is buried, a power grid operation and maintenance worker fixes the magnetic induction detection module 101 at a bucket of the excavator, and the magnetic induction detection module 101 is detected to the ground along with the bucket to perform an excavation operation. During operation, the coil 204 in the transmitter unit 201 generates a varying magnetic field signal, and the first signal amplifier 205 amplifies the magnetic field signal to generate an electromagnetic field in the surrounding space and induce currents in the cables in the electromagnetic field, which induce a secondary electromagnetic field around the cables. The magnetic field sensor 206 in the measurement unit 202 may collect and measure the field intensity of the secondary electromagnetic field and generate a field intensity signal, and the field intensity signal is amplified by the second signal amplifier 207 and then sent to the processing unit 203. The analog-to-digital converter 208 of the processing unit 203 converts the field strength signal from an analog signal to a digital signal. Then, the cpu 209 may calculate the relative distance between the cable and the construction tool according to the field intensity of the secondary electromagnetic field, and further generate an alarm signal according to the relative distance and send the alarm signal to the alarm module 102 by the signal transmitter 210. The alarm module 102 is disposed near the constructor, and the alarm module 102 sends out an alarm according to the alarm signal, where the alarm may be: two meters from the cable, please note. The constructor can know the distance between cable and the scraper bowl in real time according to the chimes of doom to the operating range of standard control scraper bowl.
The utility model provides an external force damage alarm device is prevented to cable, it can produce the magnetic field that changes around the construction utensil to be provided with the transmitting element, make the cable that is in the magnetic field that changes produce the induced-current, measuring element can measure the field intensity of the secondary magnetic field that the induced-current produced, processing unit can calculate the relative distance between cable and the construction utensil according to the field intensity of secondary magnetic field, then generate alarm signal, the real-time accurate calculation of relative distance between construction utensil and the cable has been realized, the condition of preventing carelessly digging up disconnected cable in the work progress takes place, the security of work progress has been improved.
With continued reference to fig. 2, optionally, the signal transmitter 210 is a bluetooth signal transmitter.
Specifically, the bluetooth signal transmitter is in communication connection with the alarm module 102, and can transmit the alarm signal to the alarm module 102 in a wireless communication mode, so that wireless transmission between the induction detection module and the alarm module is realized, and the safety and flexibility of the construction process are improved.
Fig. 3 is a schematic structural diagram of another cable external force damage prevention alarm device according to an embodiment of the present invention, and referring to fig. 3, optionally, the alarm module 102 includes a signal receiver 301, a signal processor 302 and a speaker 303, where the signal receiver 301 is configured to receive an alarm signal sent by the signal transmitter 210; the signal processor 302 is connected with the signal receiver 301 and used for analyzing the alarm signal; a speaker 303 is connected to the signal processor 302 for sounding an alarm and broadcasting the relative distance.
Specifically, the signal receiver 301 may be a bluetooth signal receiver, and is connected to the bluetooth signal transmitter in a wireless communication manner, and may receive an alarm signal sent by the bluetooth signal transmitter. The signal processor can be a control chip, can analyze the alarm signal and control the loudspeaker 303 to send out a corresponding alarm according to the alarm signal, prompts the relative distance between the construction equipment and the cable for construction personnel, realizes the real-time monitoring and alarm of the relative distance, and improves the construction safety and the trust of the construction personnel.
The embodiment of the invention also provides an external force damage prevention alarm method for the cable. The external damage prevention alarm method for the cable can be implemented by adopting any external damage prevention alarm device for the cable in the embodiment, fig. 4 is a flow chart of the external damage prevention alarm method for the cable provided by the embodiment of the invention, and referring to fig. 4, the external damage prevention alarm method for the cable comprises the following steps:
s401, a magnetic induction detection module detects the relative distance between the cable and the construction tool and generates an alarm signal according to the relative distance.
S402, the alarm module gives an alarm according to the alarm signal.
According to the cable external damage prevention alarm method provided by the embodiment, the magnetic induction detection module detects the relative distance between the cable and the construction tool based on electromagnetic induction, the alarm signal is generated according to the relative distance, the alarm module carries out alarm reminding on site constructors according to the alarm signal, the problem that information between a bottom-crossing responsible person and actual operation personnel is asymmetric is solved, the distance between the construction tool and the cable is monitored in real time, the situation that the cable is broken due to careless digging in the construction process is prevented, and the safety of the construction process is improved.
Fig. 5 is a flowchart of another cable external damage prevention alarm method according to an embodiment of the present invention, and referring to fig. 5, the cable external damage prevention alarm method includes:
s501, the transmitting unit generates a changing magnetic field around the construction appliance, and the cable in the changing magnetic field generates induction current.
S502, the measuring unit measures the magnetic field intensity of the secondary magnetic field generated by the induction current.
S503, the processing unit judges the relative distance between the cable and the construction appliance according to the magnetic field intensity of the secondary magnetic field and generates an alarm signal according to the relative distance.
And S504, the alarm module sends out an alarm according to the alarm signal.
According to the alarm method for preventing the cable from being damaged by the external force, the transmitting unit generates the changed magnetic field around the construction appliance, so that the cable in the changed magnetic field generates the induced current, the measuring unit measures the field intensity of the secondary magnetic field generated by the induced current, the processing unit calculates the relative distance between the cable and the construction appliance according to the field intensity of the secondary magnetic field, and then generates the alarm signal, so that the accurate calculation of the relative distance between the construction appliance and the cable is realized, the situation that the cable is inadvertently cut off in the construction process is prevented, and the safety of the construction process is improved.
Fig. 6 is a flowchart of another cable external damage prevention alarm method according to an embodiment of the present invention, and referring to fig. 6, the cable external damage prevention alarm method includes:
s601, the transmitting unit generates a changing magnetic field around the construction appliance, and the cable in the changing magnetic field generates induction current.
S602, the measuring unit measures the magnetic field intensity of the secondary magnetic field generated by the induction current.
S603, the analog-to-digital converter performs analog-to-digital conversion on the field intensity signal.
S604, the central processing unit calculates the relative distance according to the field intensity signal, further judges the relative relation between the relative distance and the preset distance, and generates an alarm signal according to the relative relation.
And S605, the signal emitter sends out an alarm signal.
And S606, the alarm module gives an alarm according to the alarm signal.
The cable external damage prevention alarm device and method provided by the embodiment have the advantages that the transmitting unit is arranged to generate a changing magnetic field around a construction appliance, so that the cable in the changing magnetic field generates induction current, the measuring unit can measure the field intensity of a secondary magnetic field generated by the induction current in real time, the processing unit calculates the relative distance between the cable and the construction appliance according to the field intensity of the secondary magnetic field, and then generates an alarm signal, so that the real-time accurate calculation of the relative distance between the construction appliance and the cable is realized, the situation that the cable is inadvertently cut off in the construction process is prevented, and the safety of the construction process is improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a cable prevents external damage alarm device which characterized in that includes:
the magnetic induction detection module is arranged on a construction appliance and used for detecting the relative distance between a cable and the construction appliance along with the construction appliance extending into the ground and generating an alarm signal according to the relative distance;
and the alarm module is in communication connection with the magnetic induction detection module and is used for sending an alarm according to the alarm signal.
2. The cable external damage prevention alarm device of claim 1, wherein the magnetic induction detection module further comprises:
a transmitting unit for generating a varying magnetic field around the construction equipment, so that the cable in the varying magnetic field generates an induced current;
a measuring unit for measuring a magnetic field strength of a secondary magnetic field generated by the induced current;
and the processing unit is connected with the measuring unit and used for judging the relative distance between the cable and the construction appliance according to the magnetic field intensity of the secondary magnetic field and generating an alarm signal according to the relative distance.
3. The cable external damage prevention alarm device of claim 2, wherein the transmitting unit comprises:
a coil for generating a varying magnetic field signal;
and the first signal amplifier is connected with the coil and is used for amplifying the magnetic field signal.
4. The cable external damage prevention alarm device of claim 2, wherein the measuring unit comprises:
the magnetic field sensor is used for detecting the magnetic field intensity of the secondary magnetic field and generating a field intensity signal;
and the second signal amplifier is connected with the magnetic field sensor and is used for amplifying the field intensity signal.
5. The cable external damage prevention alarm device of claim 4, wherein the processing unit comprises:
the analog-to-digital converter is connected with the measuring unit and is used for performing analog-to-digital conversion on the field intensity signal;
the central processing unit is connected with the analog-to-digital converter and used for calculating the relative distance according to the field intensity signal, further judging the relative relation between the relative distance and a preset distance and generating the alarm signal according to the relative relation;
and the signal emitter is connected with the central processing unit and is used for emitting the alarm signal.
6. The cable external damage prevention alarm device of claim 5, wherein the signal transmitter is a Bluetooth signal transmitter.
7. The cable external damage prevention alarm device as claimed in claim 5, wherein the alarm module comprises a signal receiver, a signal processor and a loudspeaker, the signal receiver is used for receiving the alarm signal sent by the signal transmitter; the signal processor is connected with the signal receiver and used for analyzing the alarm signal; the loudspeaker is connected with the signal processor and used for giving an alarm and broadcasting the relative distance.
8. An external damage prevention alarm method for a cable, which is implemented by using the external damage prevention alarm device for the cable according to any one of claims 1 to 7, and comprises the following steps:
the magnetic induction detection module detects the relative distance between the cable and the construction tool and generates an alarm signal according to the relative distance;
and the alarm module gives an alarm according to the alarm signal.
9. The cable external damage prevention alarm method according to claim 8, wherein the magnetic induction detection module detects a relative distance between the cable and the construction tool and generates an alarm signal according to the relative distance, and comprises:
the transmitting unit generates a changing magnetic field around the construction tool, so that the cable in the changing magnetic field generates an induced current;
the measuring unit measures the magnetic field intensity of a secondary magnetic field generated by the induced current;
and the processing unit judges the relative distance between the cable and the construction appliance according to the magnetic field intensity of the secondary magnetic field and generates an alarm signal according to the relative distance.
10. The cable external damage prevention alarm method according to claim 9, wherein a processing unit determines a relative distance between the cable and the construction tool according to a magnetic field intensity of the secondary magnetic field and generates an alarm signal according to the relative distance, including:
the analog-to-digital converter performs analog-to-digital conversion on the signal of the magnetic field intensity;
the central processing unit calculates the relative distance according to the signal of the magnetic field intensity, further judges the relative relation between the relative distance and a preset distance, and generates the alarm signal according to the relative relation;
and the signal transmitter sends the alarm signal.
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| CN202110858298.XA CN113538821A (en) | 2021-07-28 | 2021-07-28 | External damage prevention alarm device and method for cable |
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| CN202110858298.XA CN113538821A (en) | 2021-07-28 | 2021-07-28 | External damage prevention alarm device and method for cable |
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| CN116363845A (en) * | 2023-06-02 | 2023-06-30 | 国网山东省电力公司东营市河口区供电公司 | External force damage early warning protection device and method for buried cable in square construction area |
| CN116863665A (en) * | 2023-07-25 | 2023-10-10 | 国网山东省电力公司临沭县供电公司 | Underground cable anti-dig alarm device |
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