CN110829625A - Cable-embedded underwater monitoring equipment - Google Patents
Cable-embedded underwater monitoring equipment Download PDFInfo
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- CN110829625A CN110829625A CN201910973536.4A CN201910973536A CN110829625A CN 110829625 A CN110829625 A CN 110829625A CN 201910973536 A CN201910973536 A CN 201910973536A CN 110829625 A CN110829625 A CN 110829625A
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- electric energy
- sensor
- sealed cavity
- underwater
- monitoring device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/30—Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
Abstract
The invention discloses an embedded cable type underwater monitoring device, which belongs to the technical field of underwater environment monitoring equipment and comprises: the non-contact type electric energy transmission unit is arranged in the sealed cavity, and a primary coil of the non-contact type electric energy transmission unit is nested on the outer wall of the sealed cavity; the secondary coil support is detachably fixed on the outer wall of the sealed cavity and is provided with a secondary coil corresponding to the primary coil and a near-end sensor for underwater monitoring; the photoelectric composite cable is connected to two ends of the sealed cavity, consists of an electric wire for transmitting electric energy and an optical fiber for transmitting signals, and is divided into the optical fiber and the electric wire after entering the sealed cavity. And the remote sensor is powered and data are collected by means of optical fiber energy transmission and optical fiber communication. The non-contact electric energy transmission unit inside the node supplies power to the near-end sensor wrapped and clamped on the outer wall of the cavity in a wireless electric energy transmission mode, and the power supply mode solves the problem of underwater sensor replacement.
Description
Technical Field
The invention relates to the technical field of underwater environment monitoring equipment, in particular to cable-embedded type underwater monitoring equipment.
Background
In recent years, with the rapid development of economy in China, the development and utilization degree and range of oceans, rivers and lakes are continuously expanded and deepened, and various underwater environments are often required to be measured in real time in various water area environment monitoring and resource investigation.
The method for monitoring the underwater environment is generally to acquire underwater environment monitoring data and transmit the underwater environment monitoring data to a big data processing center by using an underwater photoelectric composite cable so as to complete the monitoring of the underwater environment. The underwater monitoring device is a platform for providing electric energy and a communication channel for the underwater sensor. The networking mode of the existing underwater monitoring equipment comprises a tree structure and a series connection mode.
Referring to fig. 1, the tree structure uses each monitoring platform as a node and is integrated in a large-sized docking box. The electric energy and the information are processed in the underwater connection box and then output to the next stage of connection box, and an underwater monitoring network is formed through the cascade connection of each stage of connection box. The underwater sensor is connected with each stage of connection box to obtain electric energy from the connection box and exchange information.
Referring to fig. 2, the networking mode of the series underwater monitoring system is different from that of a tree network, the network does not use a connection box, equipment nodes are connected in series in a submarine cable, and sensors are embedded in the nodes, so that the network structure is simplified.
The tree network structure is complex, the size of a connection box is huge, the distribution difficulty is large, the cost is high, when a certain level node of the cascade network breaks down, all lower level nodes can not work, and the system reliability is poor.
The series network has a simple structure and is convenient to arrange, and when a node of certain equipment generates a short-circuit fault, other nodes cannot be influenced due to the adoption of constant-current power transmission, so that the reliability is higher. However, the sensors of the series network are generally embedded in the equipment nodes, only the environment around the nodes can be monitored, the monitoring range is small, and if the sensors are led out to the far end by wires, short circuit is easily caused by lead damage, so that the whole monitoring system is influenced. In addition, once the underwater sensors are installed and deployed, if the sensors are required to be replaced due to sensor failure or other reasons, the sensors need to be salvaged again and operated on the shore, and the salvage cost is high, so that the sensors cannot be replaced once being installed.
Disclosure of Invention
The invention aims to provide cable-embedded underwater monitoring equipment, which can complete sensor replacement underwater, is arranged in a water area through a plurality of devices connected in series and networking, provides an electric energy and a communication channel for an underwater sensor, and solves the problem of small monitoring range of the original equipment by connecting equipment nodes and sensors through optical fiber watertight cables.
In order to achieve the above object, the present invention provides an embedded cable type underwater monitoring device comprising:
the non-contact type electric energy transmission unit is arranged in the sealed cavity, and a primary coil of the non-contact type electric energy transmission unit is nested on the outer wall of the sealed cavity;
the secondary coil support is detachably fixed on the outer wall of the sealed cavity and is provided with a secondary coil corresponding to the primary coil and a near-end sensor for underwater monitoring;
the photoelectric composite cable is connected to two ends of the sealed cavity, consists of an electric wire for transmitting electric energy and an optical fiber for transmitting signals, and is divided into the optical fiber and the electric wire after entering the sealed cavity.
In the technical scheme, energy can be provided for the remote sensor and data can be collected through optical fiber energy transmission and optical fiber communication. The node is electrically isolated from the outside in an optical fiber energy transmission mode, and the problem that the node is damaged after a lead is damaged is solved. In addition, the non-contact electric energy transmission unit inside the node supplies power to the near-end sensor wrapped and clamped on the outer wall of the cavity in a wireless electric energy transmission mode, and the power supply mode solves the problem of underwater sensor replacement.
Preferably, the sealed cavity is also provided with:
the constant-current to constant-voltage electric energy conversion unit is used for converting an electric energy form;
a communication relay unit for relaying a communication signal;
the connection control unit is used for controlling the on-off and communication of the sensor;
and the high-power laser driving unit is used for supplying energy to the far-end sensor, and the far-end sensor is connected into the sealed cavity through the optical fiber watertight cable. While the reliability of the system is ensured, the sensor interface is expanded, richer monitoring means can be provided, and the monitoring range is enlarged.
Preferably, the communication relay unit is a dual-port and multi-port photoelectric switch, two optical ports of the communication relay unit are respectively connected with optical fibers in the input and output photoelectric composite cables, and the electric ports are used for being connected with the barge control unit;
the connection control unit converts power supply voltage into voltage required by output by using a plurality of DC/DC voltage conversion modules, performs on-off control on output electric energy by using a relay and an MOS (metal oxide semiconductor) tube, converts an Ethernet signal into a serial port signal by using a plurality of serial port networking modules, and performs networking control on the on-off of the relay and the MOS tube through an IO (input/output) port of the serial port networking modules;
the high-power laser driving unit comprises an adjustable constant-current driving power supply, a high-power laser and an optical fiber transceiver; the adjustable constant current driving power supply outputs a constant current power supply to drive the high-power laser, laser is generated and coupled into the energy transmission optical fiber and is transmitted to the far-end sensor, and the photovoltaic cell of the far-end sensor generates electric energy for the sensor to use after being irradiated by the laser; the fiber optic transceiver is used for sending and receiving communication signals of the remote sensor.
In order to further expand the sensor interface and enlarge the monitoring range, preferably, the sealed cavity is provided with an embedded sensor for directly acquiring energy from the connection control unit for observing the surrounding environment of the node.
Preferably, the sealed cavity is cylindrical, one end of the sealed cavity is provided with a primary coil support for winding the primary coil, the end of the sealed cavity is provided with an end cover, and the sealed cavity and the end cover are provided with shaft shoulders for limiting the axial movement of the primary coil support.
Preferably, the secondary winding support is removably secured between a shoulder of the sealed housing and a shoulder of the end cap.
The shaft shoulders on the sealing cavity and the end cover can limit the axial direction of the primary coil support on the one hand, and can limit the axial movement of the secondary coil support on the other hand, so that the mounting structure is more stable.
Preferably, the secondary coil support comprises two semicircular clamping rings connected through a hinge, and a tension spring for clamping the secondary coil support on the sealed cavity is arranged between the two clamping rings. The two clamping rings are clamped on the outer wall of the sealed cavity through the tension of the tension spring.
Preferably, the secondary coil support is further provided with a secondary side electric cavity, and a rectification filter circuit for rectifying and filtering alternating current generated by electromagnetic induction is arranged in the secondary side electric cavity; the secondary coil is connected to the secondary side electrical cavity by a watertight cable.
Preferably, the primary coil and the secondary coil are sealed by glue filling.
Preferably, the contactless power transfer unit further includes an inverter and a driving thereof, and a compensating circuit for converting the direct current into the alternating current to drive the primary coil.
Compared with the prior art, the invention has the beneficial effects that:
the monitoring equipment is connected in series in a section of photoelectric composite cable, so that the arrangement is more convenient, constant-current power transmission is used, and the reliability is higher. The use of fiber optic transmission to power the remote sensors provides electrical isolation while the system allows a wider range of observation of the vicinity of a single node. The underwater replacement problem of the sensor is solved by using a mode of transmitting non-contact electric energy to the sensor for power supply.
Drawings
FIG. 1 is a schematic diagram of a networking scheme of a tree structure in the background art of the present invention;
FIG. 2 is a schematic diagram of a networking scheme in a serial form in the background art of the present invention;
FIG. 3 is a schematic structural diagram of an embedded cable type underwater monitoring device in an embodiment of the invention;
fig. 4 is a schematic view of the installation of the primary coil in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a secondary coil support in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the following embodiments and accompanying drawings.
Examples
Referring to fig. 3 to 5, the cable-embedded underwater monitoring device of the present embodiment includes:
the non-contact type electric energy transmission device comprises a sealed cavity 1, wherein a non-contact type electric energy transmission unit 5 is arranged in the sealed cavity 1, a primary coil 7 of the non-contact type electric energy transmission unit 5 is nested on the outer wall of the sealed cavity 1, is sealed by glue pouring and is connected to the inside of the cavity through a watertight cable 10;
the secondary coil support is detachably fixed on the outer wall of the sealed cavity 1, and a secondary coil 11 corresponding to the primary coil 7 and a near-end sensor 12 for underwater monitoring are arranged on the secondary coil support;
and photoelectric composite cables 9 connected to both ends of the sealed cavity 1, composed of electric wires for transmitting electric energy and optical fibers for transmitting signals, and divided into optical fibers and electric wires after entering the sealed cavity 1.
The sealed cavity 1 is a cylindrical cavity, and the tapered protective sleeves 103 at the two ends of the cavity are used for preventing the photoelectric composite cable 9 from being bent. The sealing cavity 1 is also internally provided with:
a constant current to constant voltage power conversion unit (CC/CV unit) 2 for converting the power form;
a communication relay unit 3 for relaying a communication signal;
the connection control unit 4 is used for controlling the on-off and communication of the sensor;
the high-power laser driving unit 6 is used for supplying energy to a far-end sensor, and the far-end sensor is connected into the sealed cavity 1 through an optical fiber watertight cable;
and the embedded sensor 8 is used for observing the surrounding environment of the node.
The communication relay unit 3 can select a photoelectric switch with double optical ports and multiple electric ports, two optical ports of the photoelectric switch are respectively connected with optical fibers in the input and output photoelectric composite cables, and the electric ports are used for connecting the connection control unit 4.
The control unit 4 of plugging into uses a plurality of DC/DC voltage conversion modules to convert mains voltage into the voltage size required by output, uses relay and MOS pipe to carry out on-off control of output electric energy, uses a plurality of serial port networking modules to convert Ethernet signals into serial port signals, and carries out networking control to the on-off of relay and MOS pipe through the IO port of serial port networking module.
The high-power laser driving unit 6 comprises an adjustable constant-current driving power supply, a high-power laser and an optical fiber transceiver. The adjustable constant current driving power supply outputs a constant current power supply to drive the high-power laser, the laser generates laser and is coupled into the energy transmission optical fiber to be transmitted to the far-end sensor, and the photovoltaic cell of the far-end sensor generates electric energy for the sensor after being irradiated by the laser. The fiber optic transceiver is used for sending and receiving communication signals of the remote sensor.
The non-contact power transmission unit 5 includes an inverter and a driving and compensating circuit thereof for converting a direct current into an alternating current to drive the primary coil 7. The secondary coil 11 attached to the outer wall of the primary coil 7 can generate voltage by the principle of electromagnetic mutual inductance, thereby supplying power to the secondary coil in a non-contact manner. The primary coil 7 is mounted in the manner shown in fig. 4, the coil is wound on a cylindrical support 101 and sealed by potting adhesive, one end of the cylindrical support 101 abuts against a shaft shoulder of the outer wall of the sealed cavity, and the other end is clamped by an end cover 102. The maximum outer diameters of the end caps and the seal housing are each larger than the outer diameter of the cylindrical holder 101 to create a shoulder that limits axial movement of the secondary coil holder fitted on the cylindrical holder 101.
The secondary coil support comprises two semicircular clamping rings 14 connected through a hinge 13, and a tension spring 15 for clamping the secondary coil support on the sealed cavity 1 is arranged between the two clamping rings 14. The secondary coils 11 are respectively encapsulated on the inner walls of two snap rings 14, also sealed with potting compound, connected to a secondary side electrical cavity 16 by watertight cables 17. The secondary side electric cavity 16 mainly includes a rectifying and filtering circuit for rectifying and filtering the alternating current generated by electromagnetic induction and outputting the direct current voltage required by the sensor.
The near-end sensor 12 powered by non-contact power transmission is not connected with a monitoring device node through a watertight cable, and the problem of node water entering does not need to be considered when the near-end sensor is disassembled or installed underwater. When the near-end sensor needs to be replaced, the underwater robot can be used for replacing the underwater sensor, the clamping ring 14 is pulled open, and the frogman can directly replace the sensor in a shallow water area. The connection mode solves the problem of replacement of the sensor of the underwater monitoring system.
The working process of the embodiment is as follows:
energy part: the monitoring system of the embodiment adopts constant current transmission, and most underwater instruments need constant voltage power supply. A Constant Current (CC) flowing from the photoelectric composite cable flows into the CC/CV unit, and a Constant Voltage (CV) power supply is output and used for supplying power to the communication relay unit 3 and the connection control unit 4; the connection control unit 4 converts the power supply into the voltage required by the electric appliance, integrates the voltage into a plurality of paths of outputs and respectively supplies power to the non-contact electric energy transmission unit 5, the embedded sensor 8 and the high-power laser driving unit 6; the non-contact power transmission unit 5 can supply power to external non-contact power transmission electric appliances; the high-power laser driving unit 6 is used for supplying energy to the remote sensor; and the embedded sensor 8 directly obtains energy from the connection control unit 4 to detect the water environment near the node.
A communication section: the monitoring system of the embodiment uses ethernet communication, the optical fiber in the photoelectric composite cable 9 is connected with the communication relay unit 3, the communication relay unit 3 performs photoelectric signal conversion, the electric signal is connected to the connection control unit 4, the connection control unit 4 converts the ethernet signal into a serial port signal commonly used by the sensor, and the serial port signal is respectively connected to the non-contact electric energy transmission unit 5, the embedded sensor 8 and the high-power laser driving unit 7, so that a communication channel is provided for each sensor. The remote sensor communicates with the high power laser drive unit 6 via optical fibres.
Claims (10)
1. An embedded cable type underwater monitoring device, comprising:
the non-contact type electric energy transmission unit is arranged in the sealed cavity, and a primary coil of the non-contact type electric energy transmission unit is nested on the outer wall of the sealed cavity;
the secondary coil support is detachably fixed on the outer wall of the sealed cavity and is provided with a secondary coil corresponding to the primary coil and a near-end sensor for underwater monitoring;
and the photoelectric composite cable is connected to two ends of the sealed cavity, consists of an electric wire for transmitting electric energy and an optical fiber for transmitting signals, and is divided into the optical fiber and the electric wire after entering the sealed cavity.
2. The embedded cable type underwater monitoring device of claim 1, wherein:
the constant-current to constant-voltage electric energy conversion unit is used for converting an electric energy form;
a communication relay unit for relaying a communication signal;
the connection control unit is used for controlling the on-off and communication of the sensor;
the high-power laser driving unit is used for supplying energy to the far-end sensor, and the far-end sensor is connected to the inside of the sealed cavity through the optical fiber watertight cable.
3. The underwater cable-embedded monitoring device of claim 2, wherein the communication relay unit is a dual-port and multi-port photoelectric switch, two optical ports of the communication relay unit are respectively connected to the optical fibers in the input and output photoelectric composite cables, and the electrical ports are used for connecting the barge control unit;
the connection control unit converts power supply voltage into voltage required by output by using a plurality of DC/DC voltage conversion modules, performs on-off control on output electric energy by using a relay and an MOS (metal oxide semiconductor) tube, converts an Ethernet signal into a serial port signal by using a plurality of serial port networking modules, and performs networking control on the on-off of the relay and the MOS tube through an IO (input/output) port of the serial port networking modules;
the high-power laser driving unit comprises an adjustable constant-current driving power supply, a high-power laser and an optical fiber transceiver; the adjustable constant current driving power supply outputs a constant current power supply to drive the high-power laser, laser is generated and coupled into the energy transmission optical fiber and is transmitted to the far-end sensor, and the photovoltaic cell of the far-end sensor generates electric energy for the sensor to use after being irradiated by the laser; the fiber optic transceiver is used for sending and receiving communication signals of the remote sensor.
4. The embedded cable type underwater monitoring device of claim 2, wherein the sealed cavity is provided with an embedded sensor for directly obtaining energy from the docking control unit for observing the environment around the node.
5. The underwater cabled monitoring device according to claim 1, wherein the sealed chamber is cylindrical, a primary coil support for winding the primary coil is provided at one end of the sealed chamber, an end cap is provided at the end of the sealed chamber, and the sealed chamber and the end cap are provided with a shoulder for limiting the axial movement of the primary coil support.
6. The tethered underwater monitoring device of claim 5, wherein the secondary coil support is removably secured between a shoulder of the sealed housing and a shoulder of the end cap.
7. The mooring type underwater monitoring device as claimed in claim 6, wherein the secondary coil support comprises two semicircular snap rings connected by a hinge, and a tension spring is arranged between the two snap rings to clamp the secondary coil support on the sealed cavity.
8. The embedded cable type underwater monitoring device of claim 1, wherein a secondary side electric cavity is further arranged on the secondary coil support, and a rectifying and filtering circuit for rectifying and filtering alternating current generated by electromagnetic induction is arranged in the secondary side electric cavity; the secondary coil is connected to the secondary side electrical cavity by a watertight cable.
9. The embedded cable type underwater monitoring device of claim 1, wherein the primary coil and the secondary coil are sealed by means of potting.
10. The underwater cable monitoring device of claim 1, wherein the contactless power transfer unit further comprises an inverter and its driver, and a compensation circuit for converting dc power into ac power to drive the primary coil.
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