CN111583589A - Progressive operation detection system for early warning and protection large machinery of power pipe gallery - Google Patents
Progressive operation detection system for early warning and protection large machinery of power pipe gallery Download PDFInfo
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- CN111583589A CN111583589A CN202010220973.1A CN202010220973A CN111583589A CN 111583589 A CN111583589 A CN 111583589A CN 202010220973 A CN202010220973 A CN 202010220973A CN 111583589 A CN111583589 A CN 111583589A
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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
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
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Abstract
The invention discloses a progressive operation detection system for a large-scale machine for early warning and protection of a power pipe gallery, which utilizes an accompanying optical cable laid in the same ditch with a power cable, the accompanying optical cable is connected to an optical analysis host, and once the large-scale machine which is illegally constructed approaches to a power underground pipe gallery, the accompanying optical cable detects vibration and converts a vibration signal into an optical signal; the optical signal is transmitted to the optical analysis host, and the optical analysis host demodulates the optical signal, so that the positioning information of the large machinery illegally intruding into the power pipe gallery can be obtained and visually displayed by a computer. And the optical analysis host sends alarm information to the distributed optical fiber vibration early warning system software according to the threat degree and sends related short messages to power inspection personnel according to the strength of the optical signal. The invention has the advantages of reducing the maintenance cost, improving the reliability, greatly improving the patrolling benefit and realizing long-distance, all-weather and distributed real-time online early warning protection.
Description
Technical Field
The invention relates to an optical fiber vibration early warning protection system for a power pipe gallery, in particular to a progressive operation detection system for a large-scale machine for early warning protection of the power pipe gallery.
Background
Along with the continuous acceleration of city transformation pace, the direction development of buried electric power communication optical cables and channels positive high density and large length, the electric power communication optical cables lay cables in the same ditch, and the occupied proportion of the cables in an urban power grid is larger and larger. In recent years, city construction is rapidly expanded, projects such as subways, overhead construction and river regulation are comprehensively developed, and the situation of preventing the external force damage of underground power communication optical cables and channels is increasingly severe; meanwhile, the demand of social high-quality service is higher and higher, external operation environments such as public opinion supervision and government supervision are increasingly severe, and the requirement of power supply reliability of an urban power grid is higher and higher.
Meanwhile, the power pipelines are buried at two sides of urban roads shallowly, have more points, wide areas and long lines, are exposed outdoors for a long time and are easy to be damaged by various external forces. Such as: the importance of the buried cable and the hazard of accidents are not recognized enough by construction units, and the cable is dug up for construction period and rough construction, so that the life of the masses is inconvenient, and the production accidents of enterprises are caused. Moreover, the power cable has the characteristic of concealment, fault finding is difficult, and the timeliness of fault emergency repair cannot be guaranteed.
Conventional power cabling and channel management cannot meet new potential operating requirements. The current electric power piping lane protection measure is the manpower patrol, specifically as follows: facilities such as transformer substations, earthing cables, pipe wells and the like need to be inspected once every three months, and various inspections such as chemical corrosion, electrochemical corrosion, insect and mouse damage and the like need to be carried out on the lines, and special inspection, fault and defect inspection in abnormal weather is needed. All are non-real-time monitoring, and can not detect on line in all weather, long distance and distributed manner, so that great hidden danger exists.
The existing power pipe gallery early warning protection large-scale machinery progressive operation, such as large-scale mechanical equipment like an excavator, mainly depends on civil air defense. People's air defense is the post patrol, however, patrol personnel can not continuously monitor for 7 days and 24 hours, personnel are tired and patrol for a time interval, large construction operation equipment is close to the power underground pipe gallery, three hours are slow, thirty minutes are fast, and security personnel can rush to the site for treatment after the power underground pipe gallery is damaged, which is late for the power patrol personnel. The civil air defense can play a certain role, but the civil air defense cannot ensure the timely discovery and prevention in advance and in the process, and the cost of the civil air defense is high.
The important assets are protected, the economic loss is reduced, the protection cost is reduced, and the removal of construction threats is the important importance of the protection of the power pipe gallery.
Disclosure of Invention
Aiming at the problems, the invention provides the optical fiber vibration early warning protection system for the power pipe gallery, which can actively detect the gradual invasion of large-scale equipment such as an excavator and the like illegally constructed near the power pipe gallery, automatically early warn, intervene in time, avoid major accidents and ensure the safety of the power pipe gallery.
In order to achieve the above object, the present invention provides a power pipe gallery early warning protection large machine progressive operation detection system, which comprises: a power cable that runs a power cable within a power tube lane and simultaneously runs a companion optical cable at the power tube lane; the accompanying optical cable is used for detecting vibration generated by large mechanical equipment along the power pipe gallery and converting a vibration signal into an optical signal in the accompanying optical cable to be transmitted to the optical analysis host; the optical analysis host demodulates the optical signal and obtains positioning information of operation of illegally invading the power pipe gallery by large machinery; and the display of the computer is used for visually displaying the positioning information of the operation of the large machinery illegally invading the power pipe gallery.
In a preferred mode, the accompanying optical cable is a three-core optical cable, the optical analysis host is connected with a starting point sensing box, the starting point sensing box is connected with the starting ends of two-core optical cables in the accompanying optical cable, and the tail ends of the two-core optical cables are connected with a terminal point sensing box; meanwhile, the optical analysis host is connected with the starting end of the other optical cable in the accompanying optical cables, and the tail end of the other optical cable in the accompanying optical cables is connected with the terminal point sensing box; the starting point sensing box and the end point sensing box are optical couplers and are used for splitting and combining optical signals.
Preferably, the optical signal emitted by the optical analysis host is divided into two paths of optical signals by the starting point sensing box and transmitted in the two-core optical cable of the accompanying optical cable, and the two paths of optical signals are combined into one path of optical signal by the end point sensor, reflected to the other core optical cable of the accompanying optical cable, and finally transmitted back to the optical analysis host.
In a preferable mode, when a vibration signal of a large machine illegally intruding into an electric power pipe gallery is transmitted to an accompanying optical cable, the vibration signal enables phases of two optical signals of two optical cables in the accompanying optical cable to change, and the two optical signals with the changed phases are combined into one optical signal through a terminal sensing box and then transmitted back to the optical analysis host; and the optical analysis host demodulates and restores the optical signal into a waveform diagram of the vibration signal.
Preferably, when vibration of a large machine illegally intruding into the power pipe gallery acts on the accompanying optical cable, the time that the optical analysis host transmits an optical signal to the two-core optical cable of the three-core optical cable through the starting point sensing box and then transmits the optical signal back to the optical analysis host through the finishing point sensing box and the other core optical cable is t 1; the time that the optical analysis host transmits a light signal to the other optical cable in the three-core optical cable simultaneously and then transmits the light signal back to the optical analysis host through the end point sensing box, the two-core optical cable and the starting point sensing box is t2, the time delay of the light signals respectively transmitted from the two-core optical cable and the other optical cable in the three-core optical cable due to vibration is t1-t2, and the distance x between the vibration positioning place and the optical analysis host is:
x＝L-(t1-t2)/2*c
wherein c is the speed of light and L is the total length of the accompanying cable; the optical analysis host can calculate and obtain the positioning information of the vibration of the operation of the large-scale machine illegally invading the power pipe gallery according to the measured time t1 and t2 and the formula.
In a preferable mode, the optical analysis host and the computer are installed in a monitoring room and used for monitoring the conditions of all positions of the whole access optical cable network in real time by related workers, namely monitoring the conditions along the power pipe gallery in real time.
In a preferred mode, distributed optical fiber vibration early warning system software is installed in the computer, positioning information of large machinery illegally-intruding into the power pipe gallery operation obtained by analysis of the optical analysis host is transmitted to the distributed optical fiber vibration early warning system software and visually displayed, and time, positioning information and threat degree of the large machinery illegally-intruding into the power pipe gallery operation are sent to relevant workers through short messages; the time, the positioning information and the threat degree of the operation of the large-scale machine illegally invading the power pipe gallery are stored in a computer in a log mode, and related personnel can read the time, the positioning information and the threat degree at any time.
In an optimal mode, when large mechanical equipment is closer to a power pipe gallery, the waveform of a vibration signal demodulated by the optical analysis host changes from density to density, and the early warning information changes from non-emergency to emergency; the optical analysis host sends alarm information to distributed optical fiber vibration early warning system software according to the threat degree; when the optical analysis host sends an alarm to the distributed optical fiber vibration early warning system software, the distributed optical fiber vibration early warning system software represents an event that a large machine illegally invades the power pipe gallery operation through a flag of the software visual interface, and the color of the flag represents the threat degree; the alarm signal is divided into three levels, green is a three-level event, and the alarm signal indicates that large machinery works within a certain range from the power pipe gallery; yellow is a secondary event, which indicates that a large machine is approaching near the power pipe gallery; red is a primary event, indicating that the power pipe gallery is being severely invaded by large machinery; when the event that the three large machines illegally invade the power pipe gallery operation is processed, the flag color gradually fades.
Preferably, the hardware device of the optical analysis host includes a signal acquisition module, and the signal acquisition module is configured to acquire an optical signal transmitted back along an optical cable; a photoelectric conversion module for converting an optical signal into an electrical signal; the electric signal demodulation module is used for demodulating the electric signal; the photoelectric conversion module includes: the photoelectric conversion circuit is used for converting a return optical signal of the signal acquisition module into an electric signal; the signal amplification circuit is used for amplifying the electric signal of the photoelectric conversion circuit; an output circuit for outputting the amplified signal of the signal amplification circuit; a reference circuit for providing a reference voltage for the signal amplification circuit.
Preferably, the photoelectric conversion circuit includes: the positive electrode of the photodiode PD1 is connected with a-5V power supply after being connected in series with the magnetic bead L3 through a resistor R8, and the negative electrode of the photodiode PD1 is connected with a pin 2 of an inverting input end of a power amplifier U1 and is connected with a pin 1 of a power amplifier U1 through a resistor R1; a pin 3 of a non-inverting input terminal of the power amplifier U1 is grounded, a pin 4 of the power amplifier U1 is connected with a-5V power supply and is connected with a Vcc power supply through a capacitor C8, meanwhile, the power amplifier U1 is grounded after being connected with a capacitor C9, a capacitor C10 and an electrolytic capacitor E6 in parallel, a pin 7 of the power amplifier U1 is connected with the Vcc power supply and is grounded after being connected with a capacitor C7 and an electrolytic capacitor E5 in parallel, a pin 0 of the power amplifier U1 is grounded, and a pin 8 of the power amplifier U1 is connected with a pin 7 of the power amplifier U1 through a resistor R20; the signal amplification circuit includes: a pin 6 of an output end of the power amplifier U1 is connected with a pin 4 of a variable gain amplifier U2 through a resistor R2, pins 2, 3, 6, 7, 14, 15, 16 and 17 of the variable gain amplifier U2 are grounded, a pin 13 of the variable gain amplifier U2 is connected with a Vcc power supply and is grounded after being connected with a capacitor C12 and an electrolytic capacitor E7 in parallel, a pin 10 of the variable gain amplifier U2 is connected with a-5V power supply and is grounded after being connected with a capacitor C13 and an electrolytic capacitor E8 in parallel, a pin 11 of the variable gain amplifier U2 is a pin connected with a gain signal, a pin 5 of the variable gain amplifier U2 is grounded after being connected with resistors R19 and R3 in series, and pins 8 and 9 of the variable gain amplifier U2 are connected with a common end of resistors R19 and R2 in parallel; the reference circuit includes: a reference voltage source U11, an input terminal pin 1 of the reference voltage source U11 is connected with a Vcc power supply and is grounded through a capacitor C33, a ground terminal pin 3 of the reference voltage source U11 is grounded, an output terminal pin 2 of the reference voltage source U11 is grounded after series connection of resistors R30 and R31 and is grounded through a capacitor C34, and a pin 12 of the variable gain amplifier U2 is connected with a common terminal of the resistors R30 and R31; the output circuit includes: a power amplifier U3, a pin 3 of a non-inverting input terminal of the power amplifier U3 is connected with a pin 1 of a variable gain amplifier U2 through a series connection of R32, R5 and R4 and is grounded through a capacitor C35, a pin 2 of an inverting input terminal of the power amplifier U3 is grounded through a resistor R18 and is connected with a pin 1 of a power amplifier U3 through a resistor R17, a pin 1 of the power amplifier U3 is connected with a common terminal of resistors R5 and R4 through a capacitor C36, a pin 4 of the power amplifier U3 is connected with a-5V power supply and is connected with a Vcc power supply through a capacitor C19 and is grounded through a parallel connection of a capacitor C16 and an electrolytic capacitor E10, a pin 7 of the power amplifier U3 is connected with the Vcc power supply and is grounded through a parallel connection of a capacitor C15 and an electrolytic capacitor E9, a pin 8 of the power amplifier U3 is connected with a pin 7 of a power amplifier U3 through a resistor R22, pin 0 of the power amplifier U3 is connected to ground, and pin 6 of the output of the power amplifier U3 is connected to the input of the ADC converter.
The invention has the beneficial effects that: the invention can be seamlessly fused with the protection mechanism of the traditional power cable, realizes the patrol protection mechanism of technical defense and civil defense, reduces the maintenance cost, improves the reliability, greatly improves the patrol benefit, and can realize long-distance, all-weather and distributed real-time online early warning protection.
Drawings
FIG. 1 is a schematic view of the overall scheme of the present invention;
FIG. 2 is a cross-sectional view of the optical fiber cable;
FIG. 3 is a monitoring interface diagram of distributed optical fiber vibration early warning system software according to the present invention;
FIG. 4 is a vibration waveform diagram without large mechanical equipment nearby around the power pipe gallery;
FIG. 5 is a graph of vibration waveforms near a large mechanical device around a power pipe gallery;
FIG. 6 is a vibration waveform diagram of a power pipe gallery subjected to intrusion by large mechanical equipment;
FIG. 7 is a schematic optical path diagram of a companion cable;
FIG. 8 is a schematic diagram of an optical analysis mainframe;
fig. 9 is a schematic circuit diagram of the photoelectric conversion module.
Detailed Description
As shown in fig. 1, the invention relates to a progressive operation detection system for a large-scale machine for early warning and protection of a power pipe gallery, which comprises: a power cable that runs a power cable within a power tube lane and simultaneously runs a companion optical cable at the power tube lane; the accompanying optical cable is used for detecting vibration generated by large mechanical equipment along the power pipe gallery and converting a vibration signal into an optical signal in the accompanying optical cable to be transmitted to the optical analysis host; the optical analysis host demodulates the optical signal and obtains positioning information of operation of illegally invading the power pipe gallery by large machinery; and the display of the computer is used for visually displaying the positioning information of the operation of the large machinery illegally invading the power pipe gallery.
As shown in fig. 1, the optical analysis host and the computer are installed in a monitoring room, and are used for monitoring the conditions of all positions of the whole access optical cable network in real time by related workers, namely monitoring the conditions along the power pipe gallery in real time.
As shown in fig. 7, the accompanying optical cable is a three-core optical cable, the optical analysis host is connected to a starting point sensing box, the starting point sensing box is connected to the starting end of a two-core optical cable in the accompanying optical cable, and the tail end of the two-core optical cable is connected to a destination sensing box; meanwhile, the optical analysis host is connected with the starting end of the other optical cable in the accompanying optical cables, and the tail end of the other optical cable in the accompanying optical cables is connected with the terminal point sensing box; the starting point sensing box and the end point sensing box are optical couplers and are used for splitting and combining optical signals.
As shown in fig. 7, the optical signal emitted by the optical analysis host is divided into two paths of optical signals by the starting point sensing box and transmitted in the two-core optical cable of the accompanying optical cable, and the two paths of optical signals are combined into one path of optical signal by the end point sensor and reflected to the other core optical cable of the accompanying optical cable, and finally transmitted back to the optical analysis host.
FIG. 8 is a schematic diagram of an optical analysis host, which includes a coherent light source composed of a DFB laser and a tunable laser controlled by a wavelength locker, a combiner, an optical detector, a PLC coherent demodulation chip, an A/D converter, and a data acquisition card; the optical analysis host is connected with a computer, and the computer comprises distributed optical fiber vibration early warning system software and is used for processing and visually displaying data.
When a vibration signal of a large machine illegally intruding into the power pipe gallery is transmitted to an accompanying optical cable, the vibration signal enables phases of two optical signals of two optical cables in the accompanying optical cable to change, and the two optical signals with the changed phases are combined into one optical signal through a terminal sensing box and then transmitted back to the optical analysis host; and the optical analysis host demodulates and restores the optical signal into a waveform diagram of the vibration signal. As can be seen from fig. 7, the laser light emitted from TX is divided into two paths, and the two paths of light are transmitted in the optical cable; when vibration waves are transmitted to the optical cable, the micro vibration enables the phase of the optical fiber to change, the vibration waves are transmitted back to the RX after being coherent, and after the optical analysis host is demodulated, signals of the vibration waves are restored, and the signals can reflect the waveform of an event.
As shown in fig. 7, when vibration of a large machine illegally intruding into the power pipe gallery works acts on the accompanying optical cable, laser light is emitted from the TX side, that is, the time elapsed for the optical analysis master to transmit an optical signal to the two-core optical cable of the three-core optical cable through the start point sensing box and then to return to the optical analysis master through the end point sensing box and the other core optical cable is t 1; the time for emitting laser from the RX side, that is, the optical analysis host simultaneously emits optical signals to the other optical cable in the three-core optical cable and then transmits the optical signals back to the optical analysis host through the destination sensing box, the two-core optical cable and the start sensing box is t2, the time delay of the optical signals respectively emitted from the two-core optical cable and the other optical cable in the three-core optical cable due to vibration is t1-t2, and the distance x between the location point of the vibration and the optical analysis host is:
x＝L-(t1-t2)/2*c
wherein c is the speed of light and L is the total length of the accompanying cable; the optical analysis host can calculate and obtain the positioning information of the vibration of the operation of the large-scale machine illegally invading the power pipe gallery according to the measured time t1 and t2 and the formula.
Fig. 3 shows a monitoring interface diagram of distributed optical fiber vibration early warning system software, the distributed optical fiber vibration early warning system software is installed in the computer, the positioning information of the operation of illegally intruding the large machine into the power pipe gallery, which is obtained by the analysis of the optical analysis host, is transmitted to the distributed optical fiber vibration early warning system software and is visually displayed, and the time, the positioning information and the threat degree of the operation of illegally intruding the large machine into the power pipe gallery are sent to relevant workers through short messages; the time, the positioning information and the threat degree of the operation of the large-scale machine illegally invading the power pipe gallery are stored in a computer in a log mode, and related personnel can read the time, the positioning information and the threat degree at any time.
When large-scale mechanical equipment is closer to the power pipe gallery, the waveform of an optical signal obtained by demodulating the signal of the optical analysis host changes from density to density, and the early warning information is changed from non-emergency to emergency; and the optical analysis host sends alarm information to the distributed optical fiber vibration early warning system software according to the threat degree.
When the optical analysis host sends an alarm to the distributed optical fiber vibration early warning system software, the distributed optical fiber vibration early warning system software represents an event that a large machine illegally invades the power pipe gallery operation through a flag of the software visual interface, and the color of the flag represents the threat degree.
The alarm signal is divided into three levels, green is a three-level event which indicates that a certain range from the power pipe gallery is detected, and as shown in fig. 4, a large machine works; yellow is a secondary event, as shown in FIG. 5, indicating that a large machine is detected in the vicinity of the power pipe lane; red is a primary event, as shown in fig. 6, indicating that the power pipe gallery is being heavily invaded by large machinery; when the event that the three large machines illegally invade the power pipe gallery operation is processed, the flag color gradually fades.
The hardware equipment of the optical analysis host comprises a signal acquisition module, wherein the signal acquisition module is used for acquiring optical signals transmitted back in an accompanying optical cable; a photoelectric conversion module for converting an optical signal into an electrical signal; the electric signal demodulation module is used for demodulating the electric signal and transmitting the electric signal to a computer; the photoelectric conversion module includes: the photoelectric conversion circuit is used for converting a return optical signal of the signal acquisition module into an electric signal; the signal amplification circuit is used for amplifying the electric signal of the photoelectric conversion circuit; an output circuit for outputting the amplified signal of the signal amplification circuit; and the reference circuit is used for providing reference voltage for the signal amplification circuit so as to enable the signal amplification circuit to work under a stable voltage environment.
As shown in a of fig. 9, the photoelectric conversion circuit includes: the positive electrode of the photodiode PD1 is connected with a-5V power supply after being connected in series with the magnetic bead L3 through a resistor R8, and the negative electrode of the photodiode PD1 is connected with a pin 2 of an inverting input end of a power amplifier U1 and is connected with a pin 1 of a power amplifier U1 through a resistor R1; a pin 3 of a non-inverting input terminal of the power amplifier U1 is grounded, a pin 4 of the power amplifier U1 is connected with a-5V power supply and is connected with a Vcc power supply through a capacitor C8, meanwhile, the power amplifier U1 is grounded after being connected with a capacitor C9, a capacitor C10 and an electrolytic capacitor E6 in parallel, a pin 7 of the power amplifier U1 is connected with the Vcc power supply and is grounded after being connected with a capacitor C7 and an electrolytic capacitor E5 in parallel, a pin 0 of the power amplifier U1 is grounded, and a pin 8 of the power amplifier U1 is connected with a pin 7 of the power amplifier U1 through a resistor R20; as shown in b of fig. 9, the signal amplifying circuit includes: a pin 6 of an output end of the power amplifier U1 is connected with a pin 4 of a variable gain amplifier U2 through a resistor R2, pins 2, 3, 6, 7, 14, 15, 16 and 17 of the variable gain amplifier U2 are grounded, a pin 13 of the variable gain amplifier U2 is connected with a Vcc power supply and is grounded after being connected with a capacitor C12 and an electrolytic capacitor E7 in parallel, a pin 10 of the variable gain amplifier U2 is connected with a-5V power supply and is grounded after being connected with a capacitor C13 and an electrolytic capacitor E8 in parallel, a pin 11 of the variable gain amplifier U2 is a pin connected with a gain signal, a pin 5 of the variable gain amplifier U2 is grounded after being connected with resistors R19 and R3 in series, and pins 8 and 9 of the variable gain amplifier U2 are connected with a common end of resistors R19 and R2 in parallel; as shown in c of fig. 9, the reference circuit includes: a reference voltage source U11, an input terminal pin 1 of the reference voltage source U11 is connected with a Vcc power supply and is grounded through a capacitor C33, a ground terminal pin 3 of the reference voltage source U11 is grounded, an output terminal pin 2 of the reference voltage source U11 is grounded after series connection of resistors R30 and R31 and is grounded through a capacitor C34, and a pin 12 of the variable gain amplifier U2 is connected with a common terminal of the resistors R30 and R31; as shown by d in fig. 9, the output circuit includes: a power amplifier U3, a pin 3 of a non-inverting input terminal of the power amplifier U3 is connected with a pin 1 of a variable gain amplifier U2 through a series connection of R32, R5 and R4 and is grounded through a capacitor C35, a pin 2 of an inverting input terminal of the power amplifier U3 is grounded through a resistor R18 and is connected with a pin 1 of a power amplifier U3 through a resistor R17, a pin 1 of the power amplifier U3 is connected with a common terminal of resistors R5 and R4 through a capacitor C36, a pin 4 of the power amplifier U3 is connected with a-5V power supply and is connected with a Vcc power supply through a capacitor C19 and is grounded through a parallel connection of a capacitor C16 and an electrolytic capacitor E10, a pin 7 of the power amplifier U3 is connected with the Vcc power supply and is grounded through a parallel connection of a capacitor C15 and an electrolytic capacitor E9, a pin 8 of the power amplifier U3 is connected with a pin 7 of a power amplifier U3 through a resistor R22, pin 0 of the power amplifier U3 is connected to ground, and pin 6 of the output of the power amplifier U3 is connected to the input of the ADC converter.
When the invasion event happens, the power pipe gallery early warning and protection large-scale mechanical progressive operation detection system can make a decision to give an alarm and send a short message to a patrol officer, so that the safety of the power pipe gallery is ensured. The patrol personnel can check the details of the intrusion event through the interface of the software and can also check the brief report information of the intrusion event through the short message of the mobile phone. The system provided by the invention is converted from traditional personnel patrol into technical protection and manual patrol, so that the safety of pipe gallery facilities is protected. The passive property of the optical cable, namely the property of no need of power supply, and the active equipment, namely the equipment with the optical analysis host and the corollary equipment which are arranged in the monitoring room and powered by the monitoring room are benefited, and the working mode of real-time early warning, protection and monitoring is realized at the background, so that the maintenance cost is reduced, the reliability is improved, and the patrol benefit is greatly improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. The utility model provides a gradual operation detection system of large-scale machinery of electric power piping lane early warning protection which characterized in that, the system includes: a power cable running within a power tube lane and simultaneously running a companion optical cable at the power tube lane; the accompanying optical cable is used for detecting vibration generated by large mechanical equipment along the power pipe gallery and converting a vibration signal into an optical signal in the accompanying optical cable to be transmitted to the optical analysis host; the optical analysis host demodulates the optical signal and obtains positioning information of operation of illegally invading the power pipe gallery by large machinery; and the display of the computer is used for visually displaying the positioning information of the operation of the large machinery illegally invading the power pipe gallery.
2. The electric power pipe gallery early warning and protection large-scale mechanical progressive operation detection system according to claim 1, wherein the accompanying optical cable is a three-core optical cable, the optical analysis host is connected with a starting point sensing box, the starting point sensing box is connected with the starting end of a two-core optical cable in the accompanying optical cable, and the tail end of the two-core optical cable is connected with a terminal point sensing box; meanwhile, the optical analysis host is connected with the starting end of the other optical cable in the accompanying optical cables, and the tail end of the other optical cable in the accompanying optical cables is connected with the terminal point sensing box; the starting point sensing box and the end point sensing box are optical couplers and are used for splitting and combining optical signals.
3. The electric power pipe gallery early warning protection large-scale machine progressive operation detection system according to claim 1, wherein the optical signal emitted by the optical analysis host is divided into two paths of optical signals through the starting point sensing box and transmitted in two optical cables in the accompanying optical cable, and the two paths of optical signals are combined into one path of optical signal through the end point sensor, reflected to the other optical cable in the accompanying optical cable, and finally transmitted back to the optical analysis host.
4. The electric power pipe gallery early warning and protection large-scale machine progressive operation detection system according to claim 1, characterized in that when a vibration signal of a large-scale machine illegally invading the electric power pipe gallery operation is transmitted to an accompanying optical cable, the vibration signal changes the phases of two optical signals of two optical cables in the accompanying optical cable, and the two optical signals with the changed phases are combined into one optical signal by a terminal point sensing box and then transmitted back to the optical analysis host; and the optical analysis host demodulates and restores the optical signal into a waveform diagram of the vibration signal.
5. The power pipe gallery early warning and protection large-scale machine progressive operation detection system according to claim 1, wherein when vibration of large-scale machine illegally invading into the power pipe gallery operation acts on the accompanying optical cable, the time for the optical analysis host to transmit optical signals to the two-core optical cable in the three-core optical cable through the starting point sensing box and then to transmit back to the optical analysis host through the finishing point sensing box and the other-core optical cable is t 1; the time that the optical analysis host transmits a light signal to the other optical cable in the three-core optical cable simultaneously and then transmits the light signal back to the optical analysis host through the end point sensing box, the two-core optical cable and the starting point sensing box is t2, the time delay of the light signals respectively transmitted from the two-core optical cable and the other optical cable in the three-core optical cable due to vibration is t1-t2, and the distance x between the vibration positioning place and the optical analysis host is:
x＝L-(t1-t2)/2*c
wherein c is the speed of light and L is the total length of the accompanying cable; the optical analysis host can calculate and obtain the positioning information of the vibration of the operation of the large-scale machine illegally invading the power pipe gallery according to the measured time t1 and t2 and the formula.
6. The electric power pipe gallery early warning protection large-scale machine progressive operation detection system according to claim 1, characterized in that the optical analysis host and the computer are installed in a monitoring room for real-time monitoring of each position condition of the whole access optical cable network by related staff, namely, real-time monitoring along the electric power pipe gallery.
7. The electric power pipe gallery early warning and protection large-scale machine progressive operation detection system according to claim 1, characterized in that distributed optical fiber vibration early warning system software is installed in the computer, positioning information of large-scale machine illegally-intruding into the electric power pipe gallery operation obtained by the analysis of the optical analysis host is transmitted to the distributed optical fiber vibration early warning system software and visually displayed, and the time, the positioning information and the threat degree of the large-scale machine illegally-intruding into the electric power pipe gallery operation are sent to relevant workers through short messages; the time, the positioning information and the threat degree of the operation of the large-scale machine illegally invading the power pipe gallery are stored in a computer in a log mode, and related personnel can read the time, the positioning information and the threat degree at any time.
8. The progressive operation detection system of the electric power pipe gallery early warning protection large machine according to claim 1, wherein when large mechanical equipment is closer to the electric power pipe gallery, the waveform of the vibration signal demodulated by the optical analysis host changes from density to density, which indicates that the early warning information changes from non-emergency to emergency; the optical analysis host sends alarm information to distributed optical fiber vibration early warning system software according to the threat degree; when the optical analysis host sends an alarm to the distributed optical fiber vibration early warning system software, the distributed optical fiber vibration early warning system software represents an event that a large machine illegally invades the power pipe gallery operation through a flag of the software visual interface, and the color of the flag represents the threat degree; the alarm signal is divided into three levels, green is a three-level event, and the alarm signal indicates that large machinery works within a certain range from the power pipe gallery; yellow is a secondary event, which indicates that a large machine is approaching near the power pipe gallery; red is a primary event, indicating that the power pipe gallery is being severely invaded by large machinery; when the event that the three large machines illegally invade the power pipe gallery operation is processed, the flag color gradually fades.
9. The progressive operation detection system of electric power pipe gallery early warning protection large machine according to claim 1, wherein the hardware equipment of the optical analysis host comprises a signal acquisition module, and the signal acquisition module is used for acquiring optical signals transmitted back along an optical cable; a photoelectric conversion module for converting an optical signal into an electrical signal; the electric signal demodulation module is used for demodulating the electric signal; the photoelectric conversion module includes: the photoelectric conversion circuit is used for converting a return optical signal of the signal acquisition module into an electric signal; the signal amplification circuit is used for amplifying the electric signal of the photoelectric conversion circuit; an output circuit for outputting the amplified signal of the signal amplification circuit; a reference circuit for providing a reference voltage for the signal amplification circuit.
10. The electric power pipe gallery early warning protection large-scale machine progressive operation detection system of claim 9, wherein the photoelectric conversion circuit comprises: the positive electrode of the photodiode PD1 is connected with a-5V power supply after being connected in series with the magnetic bead L3 through a resistor R8, and the negative electrode of the photodiode PD1 is connected with a pin 2 of an inverting input end of a power amplifier U1 and is connected with a pin 1 of a power amplifier U1 through a resistor R1; a pin 3 of a non-inverting input terminal of the power amplifier U1 is grounded, a pin 4 of the power amplifier U1 is connected with a-5V power supply and is connected with a Vcc power supply through a capacitor C8, meanwhile, the power amplifier U1 is grounded after being connected with a capacitor C9, a capacitor C10 and an electrolytic capacitor E6 in parallel, a pin 7 of the power amplifier U1 is connected with the Vcc power supply and is grounded after being connected with a capacitor C7 and an electrolytic capacitor E5 in parallel, a pin 0 of the power amplifier U1 is grounded, and a pin 8 of the power amplifier U1 is connected with a pin 7 of the power amplifier U1 through a resistor R20; the signal amplification circuit includes: a pin 6 of an output end of the power amplifier U1 is connected with a pin 4 of a variable gain amplifier U2 through a resistor R2, pins 2, 3, 6, 7, 14, 15, 16 and 17 of the variable gain amplifier U2 are grounded, a pin 13 of the variable gain amplifier U2 is connected with a Vcc power supply and is grounded after being connected with a capacitor C12 and an electrolytic capacitor E7 in parallel, a pin 10 of the variable gain amplifier U2 is connected with a-5V power supply and is grounded after being connected with a capacitor C13 and an electrolytic capacitor E8 in parallel, a pin 11 of the variable gain amplifier U2 is a pin connected with a gain signal, a pin 5 of the variable gain amplifier U2 is grounded after being connected with resistors R19 and R3 in series, and pins 8 and 9 of the variable gain amplifier U2 are connected with a common end of resistors R19 and R2 in parallel; the reference circuit includes: a reference voltage source U11, an input terminal pin 1 of the reference voltage source U11 is connected with a Vcc power supply and is grounded through a capacitor C33, a ground terminal pin 3 of the reference voltage source U11 is grounded, an output terminal pin 2 of the reference voltage source U11 is grounded after series connection of resistors R30 and R31 and is grounded through a capacitor C34, and a pin 12 of the variable gain amplifier U2 is connected with a common terminal of the resistors R30 and R31; the output circuit includes: a power amplifier U3, a pin 3 of a non-inverting input terminal of the power amplifier U3 is connected with a pin 1 of a variable gain amplifier U2 through a series connection of R32, R5 and R4 and is grounded through a capacitor C35, a pin 2 of an inverting input terminal of the power amplifier U3 is grounded through a resistor R18 and is connected with a pin 1 of a power amplifier U3 through a resistor R17, a pin 1 of the power amplifier U3 is connected with a common terminal of resistors R5 and R4 through a capacitor C36, a pin 4 of the power amplifier U3 is connected with a-5V power supply and is connected with a Vcc power supply through a capacitor C19 and is grounded through a parallel connection of a capacitor C16 and an electrolytic capacitor E10, a pin 7 of the power amplifier U3 is connected with the Vcc power supply and is grounded through a parallel connection of a capacitor C15 and an electrolytic capacitor E9, a pin 8 of the power amplifier U3 is connected with a pin 7 of a power amplifier U3 through a resistor R22, pin 0 of the power amplifier U3 is connected to ground, and pin 6 of the output of the power amplifier U3 is connected to the input of the ADC converter.
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