CN110712727B

CN110712727B - Floating platform watertight bag type buoyancy tank based on Internet

Info

Publication number: CN110712727B
Application number: CN201911002758.8A
Authority: CN
Inventors: 江泓泉; 张大刚
Original assignee: Qingdao Dmar Ocean Engineering Co ltd
Current assignee: Qingdao Dmar Ocean Engineering Co ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2023-06-16
Anticipated expiration: 2039-10-21
Also published as: CN110712727A

Abstract

The utility model provides a floating platform watertight bag formula flotation tank based on internet, its includes flotation tank main part and connecting device, connecting device is used for being connected floating platform and flotation tank main part, a serial communication port, the flotation tank main part includes the bearing structure that forms M that is matrix arrangement by girder and skeleton through plug connector or articulated elements, M N mounting is used for fixed M N watertight bag body respectively, M and N are the integer that is greater than 1, and the weight of watertight bag body can change. The watertight bag type buoyancy tank of the floating platform is convenient to sink and retract, and does not pollute a water area.

Description

Floating platform watertight bag type buoyancy tank based on Internet

Technical Field

The invention belongs to the technical field of deep water ocean oil gas development, and particularly relates to a watertight bag type buoyancy tank of a floating platform, which is convenient to sink and retract.

Background

The development of ocean oil gas in China has been over 40 years, and the ocean oil gas is gradually developed from an offshore shallow water area to a water depth increasing area until the current open sea deep water area; such pre-existing legacy jacket and gravity-type platforms have been economically unsuitable for new regional developments. Internationally, there are various floating platforms suitable for deep water oil gas development, mainly including the floating platform, in order to locate the floating platform in water, set up the buoyancy tank in the floating platform lower part, the buoyancy tank of the floating platform that provides among the prior art includes buoyancy tank main part and connecting device, connecting device is used for connecting floating platform and buoyancy tank main part, and connecting device includes a plurality of connecting pieces that set up in along buoyancy tank main part circumference or buoyancy tank main part inside, sets up the connecting piece of floating platform lower part or lateral part and the connection structure who is used for connecting piece and connecting piece. The buoyancy tanks provided in the prior art are generally disposable, and are discarded after being placed in water, so that the buoyancy tanks are permanently reserved in the water, resources are wasted, and water areas are polluted.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide the watertight bag type buoyancy tank of the floating platform, which is convenient to sink and retract and does not pollute the water area.

The invention provides a watertight bag type buoyancy tank of a floating platform, which comprises a buoyancy tank main body and a connecting device, wherein the connecting device is used for connecting the floating platform and the buoyancy tank main body, and the watertight bag type buoyancy tank is characterized in that the buoyancy tank main body comprises a supporting structure formed by connecting girders and frameworks through connectors or hinging pieces to form M x N fixing pieces which are arranged in a matrix, the M x N fixing pieces are respectively used for fixing M x N watertight bag bodies, the M and the N are integers larger than 1, and the weight of the watertight bag bodies can be changed.

Preferably, the watertight bag body is a double-air bag, wherein the air bag arranged in the water bag is communicated with the air pump through an electric control valve, and the water bag arranged outside the air bag is communicated with water through a water inlet valve and a water outlet valve; when the buoyancy tank needs to be submerged, water is injected into the water bag, the air pump works under the control of the control system, and air in the air bag is pumped out to enable water outside the water bag to be injected into the water bag through the water inlet valve; when water is discharged from the outside of the water bag, the air pump injects air into the air bag so that water in the water bag is discharged to the outside through the drain valve, and the on-off of the electric control valve is controlled by the control system.

Preferably, the floating platform watertight bladder type floating box further comprises a control system, wherein the control system comprises an attitude sensor, a height sensor, a processor, a row selector, a column selector, N column selection lines, M row selection lines, M X N watertight bladder switches and a first power supply, and the attitude sensor is used for measuring rotation angles of the floating box around an X axis, a Y axis and a Z axis of a reference coordinate system respectively and providing angle information for the processor; the height sensor is used for measuring the depth of the buoyancy tank structure sinking to the water surface and providing depth information for the processor; the processor provides control signals for the row selector and the column selector according to the information provided by the attitude sensor and the information provided by the height sensor so as to control the on-off of some or all of the M x N watertight bag body switches, so that some or all of the M x N watertight bag bodies can be filled with water or drained.

Preferably, each watertight bag switch comprises a first electric switch, a second electric switch and a relay, wherein the control end of the first electric switch is connected with a row selection line, the first terminal is connected with a column selection line, the second terminal is connected with the control end of the second electric switch, the first terminal of the second electric switch is connected with a first power line of a second power supply, the second terminal is connected with a second power line connected with the second power supply through a wire package of the relay, the second power line is a power line for providing positive power for the pixel switch, and the normally open switch of the relay is connected into a power supply circuit of the second power supply in series with the electric control valve.

Preferably, the floating platform watertight bladder type floating tank further comprises a communication subsystem, the control system at least comprises a radio frequency circuit, the radio frequency circuit at least comprises a high-frequency power amplifier 204 and a power circuit 203 for providing power for the high-frequency power amplifier, the power circuit 203 comprises a linear amplifier 206, a current detector 207, a current output unit 208, a low-pass filter 209, a synthesizer 210 and a power supply terminal 211, and the linear amplifier 206 amplifies an input signal input from the modulation signal input terminal 202 and outputs the input signal to the synthesizer 210; the current detector 207 detects a current value of an output signal output from the linear amplifier 206 to the synthesizer 210, and outputs a signal of the detection result to the current output unit 208; the current detector 207 outputs the output signal of the linear amplifier 206 output to the synthesizer 210 directly to the synthesizer 210; the current output unit 208 outputs a current according to the current value detected by the current detector 207; the low-pass filter 209 attenuates and outputs a high-frequency component of the output signal of the current output unit 208; the synthesizer 210 outputs the synthesized power of the output of the linear amplifier 206 and the output of the low-pass filter 209 to the power supply terminal 211.

Preferably, the current output unit 208 includes a first comparator 212, a second comparator 213, an inverter 214, a first switching amplifier 215, a second switching amplifier 216, and a DC power supply 217; the low-pass filter 209 includes a first low-pass filter 222 and a second low-pass filter 223, and the current detector 207 detects a current value of an output signal output from the linear amplifier 206 to the synthesizer 210 and outputs a signal having a voltage corresponding to the detection result to the current output unit 208; the first comparator 212 performs high/low level determination based on a set threshold on the input output signal from the current detector 207, and outputs the determination result to the first switching amplifier 215, and the second comparator 213 performs high/low level determination based on a predetermined threshold on the input output signal from the current detector 207, and outputs the determination result to the second switching amplifier 216 via the inverter 214; the first switching amplifier 215 is input with an output from the first comparator 212; the first switching amplifier 215 outputs the signal whose input is amplified to the low-pass filter 209; in the second switching amplifier 216, the output from the second comparator 213 is inverted by the inverter 214 and then input; the second switching amplifier 216 amplifies the signal input thereto and outputs the amplified signal to the low-pass filter 209.

Compared with the prior art, the buoyancy tank of the floating platform has the following beneficial effects: is convenient for lowering and withdrawing.

Drawings

FIG. 1 is a schematic view of a watertight bladder type buoyancy tank provided by the invention;

FIG. 2 is a circuit diagram of a control system of a watertight bladder type buoyancy tank of the floating platform provided by the invention;

FIG. 3 is a block diagram of the radio frequency circuit of the communication subsystem provided by the invention;

fig. 4 is a circuit diagram of a power amplifier provided by the present invention;

fig. 5 is a circuit diagram of the current output unit 208 and the low-pass filter 209 provided by the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The buoyancy tank main body comprises a supporting structure which is formed by connecting a girder and a framework through a plug-in connector or a hinge connector and is used for fixing a ballast device fixing piece, the ballast device can be a solid weight, and the weight of the solid weight to be placed is controlled according to the gravity center set by the floating platform. The ballast device may also be a watertight bladder, and the structure of the buoyancy tank when the ballast device is a watertight bladder will be described in detail below with reference to fig. 5.

Fig. 1 is a schematic structural diagram of a watertight bag type buoyancy tank provided by the invention, as shown in fig. 1, the watertight bag type buoyancy tank comprises a buoyancy tank main body and a connecting device, the connecting device is used for connecting a floating platform and the buoyancy tank main body, the buoyancy tank main body comprises a supporting structure formed by connecting girders and frameworks through connectors or hinging pieces to form M x N fixing pieces in matrix arrangement, the M x N fixing pieces are respectively used for fixing M x N ballast devices, both M and N are integers larger than 1, and the weight of the ballast devices can be changed. According to one embodiment of the invention, m×n ballast devices form a matrix of M rows and N columns. When the ballast device is a watertight bag body, the watertight bag body can also be a double-air bag, wherein the air bag arranged in the water bag is communicated with the air pump through the electric control valve, and the water bag arranged outside the air bag is communicated with water through the water inlet valve and the water outlet valve. The air bag is an air chamber, and the water bag is a water chamber. The air chamber is connected with the air pump 105 through an electric control valve, the water chamber is respectively provided with a water inlet valve and a water outlet valve, when water is injected into the watertight bag body, the air pump 105 works under the control of the control system, air in the air bag is pumped out to enable the air bag to shrink, and water outside the watertight bag body is injected into the water chamber through the water inlet valve; when the watertight bag body is drained, the air pump injects air into the air bag so as to expand the air bag, water in the water bag is drained out of the water bag through the drain valve, and the on-off of the electric control valve is controlled by the control system. More specifically, the air chambers in the water-tight bag body W11 positioned in the 1 st row and the 1 st column are connected to the air pump 105 through the electric control valve V11, the water chambers are respectively provided with a water inlet valve and a water outlet valve, when water is injected into the water-tight bag body W11, the air pump 105 works under the control of the control system, air in the air chambers is pumped out to shrink the air chambers, and water outside the water-tight bag body V11 is injected into the water chambers through the water inlet valve; when water is discharged from the watertight bag body W11, the air pump injects air into the air chamber so as to expand the air chamber, water in the watertight bag body W11 is discharged to the outside of the water chamber through the water discharge valve, the on-off of the electric control valve V11 is controlled by the control system, specifically, the power supply 106 is used for providing electric energy for the electric control valve V11, and the electric control switch K11 is connected in series in the power supply circuit.

The air chamber in the watertight bag body WN1 positioned in the 1 st row and the N th column is connected with the air pump 105 through the electric control valve VN1, the water chamber is respectively provided with a water inlet valve and a water outlet valve, when water is injected into the watertight bag body WN1, the air pump 105 works under the control of the control system, air in the air chamber is pumped out to enable the air bag to shrink, and water outside the watertight bag body VN1 is injected into the water chamber through the water inlet valve; when water is discharged from the watertight bag body WN1, the air pump injects air into the air chamber so as to expand the air chamber, water in the watertight bag body WN1 is discharged to the outside of the water chamber through the water discharge valve, the on-off of the electric control valve VN1 is controlled by the control system, specifically, the power supply 106 is used for providing electric energy for the electric control valve VN1, and the electric control switch KN1 is connected in series in a power supply circuit of the electric control valve VN 1.

The air chamber in the M-row and 1-column watertight bag body W1M is connected with the air pump 105 through the electric control valve V1M, the water chambers are respectively provided with a water inlet valve and a water outlet valve, when water is injected into the watertight bag body W1M, the air pump 105 works under the control of the control system, air in the air chamber is pumped out to enable the air bag to shrink, and water outside the watertight bag body V1M is injected into the water chamber through the water inlet valve; when water is discharged from the watertight bag body W1M, the air pump injects air into the air chamber so as to expand the air chamber, water in the watertight bag body W1M is discharged to the outside of the water chamber through the water discharge valve, the on-off of the electric control valve V1M is controlled by the control system, specifically, the power supply 106 is used for providing electric energy for the electric control valve V1M, and the electric control switch K1M is connected in series in the power supply circuit.

The air chamber in the water-tight bag body WNM positioned in the M row and the N column is connected with the air pump 105 through the electric control valve VNM, the water chamber is respectively provided with the water inlet valve and the water outlet valve, when water is injected into the water-tight bag body WNM, the air pump 105 works under the control of the control system, air in the air chamber is pumped out to enable the air bag to shrink, and water outside the water-tight bag body VNM is injected into the water chamber through the water inlet valve; when water is discharged from the watertight bladder WNM, the air pump injects air into the air chamber to expand the air bag, water in the watertight bladder WNM is discharged to the outside of the water chamber through the water discharge valve, the on-off of the electric control valve VNM is controlled by the control system, specifically, the power supply 106 is used for providing electric energy for the electric control valve VNM, and the electric control switch KNM is connected in series in the power supply circuit.

The following describes in detail the control system of the buoyancy tank structure according to the preferred embodiment of the present invention with reference to fig. 2.

Fig. 2 is a circuit diagram of a control system of a watertight bladder type buoyancy tank of a floating platform according to the present invention, as shown in fig. 2, according to one implementation of the present invention, m×n watertight bladder bodies on a buoyancy tank structure 5 are arranged in a matrix, and are controlled by m×n watertight bladder body switches, specifically, the control system includes an attitude sensor 101, a depth sensor 107, a processor 102, a row selector 103, a column selector 104, N column selection lines, M row selection lines, a first power supply, and m×n watertight bladder body switches, the attitude sensor 101 is configured to measure rotation angles of the buoyancy tank structure around X, Y, and Z axes of a reference coordinate system, respectively, and provide angle information to the processor 102, where the reference coordinate system refers to an origin point with a center of the buoyancy tank structure as coordinates, and when the buoyancy tank structure floats on a water surface, the X axis along a long direction, Y axis along a wide direction, and a direction perpendicular to the X axis and the Y axis along a right hand line. The depth sensor 107 is used to measure the depth of the buoyancy tank structure submerged to the water surface and provide depth information to the processor 102. The processor 102 provides control signals for the row selector and the column selector according to the information provided by the attitude sensor 101 and the information provided by the depth sensor so as to select whether some or all of the M x N watertight capsules are filled with water or discharged, when water is filled, air in the watertight capsules is pumped out through the air pump so that water enters the watertight capsules through the water inlet valve, and when water is discharged, air is injected into the watertight capsules through the air pump so that the watertight capsules are discharged through the water outlet valve. Preferably, each watertight bladder is provided with a one-way water inlet valve and a one-way water outlet valve at the bottom, and an electrically controlled valve V is provided at the top of the watertight bladder, each electrically controlled valve V being controlled by an electrically controlled switch K to switch on the power supply 106. Each watertight bag switch comprises a first electric switch and a second electric switch, wherein the control end of the first electric switch is connected with a row selection line, the first terminal is connected with a column selection line, the second terminal is connected with the control end of the second electric switch, the first terminal of the second electric switch is connected with the ground or public end of a power supply, and the second terminal is connected with a power supply line of the power supply EC1 through a wire package of a relay J; the two ends of the coil of the relay J are connected in parallel with a diode, the positive end of the diode is connected with the second terminal of the second electric switch, and the negative end of the diode is connected with the common end of the power supply. The electrically controlled valve connected to the watertight bladder is connected to the power supply 107 via a normally open connection of relay J. For example, the watertight bladder switch located in the first row and the first column includes an electrical switch T111 and an electrical switch T112, wherein a control terminal of the electrical switch T111 is connected to the first row selection line P1, a first terminal of the electrical switch T111 is connected to the first column selection line L1, a second terminal of the electrical switch T111 is connected to a control terminal of the second electrical switch T112, a first terminal of the electrical switch T112 is connected to ground, and a second terminal of the electrical switch T111 is connected to the power supply EC1 via a wire package of the relay J11. The constant switch K11 of the relay J11 is connected in series to the power supply circuit of the electric control valve V11 of the watertight bag body W11 positioned in the first row and the first column, so that the water inlet and the water outlet of the watertight bag body W11 positioned in the first row and the first column can be controlled.

The watertight bladder switch located in the nth column of the first row includes an electric switch TN11 and an electric switch TN12, a control terminal of the electric switch TN11 is connected to the first row selection line P1, a first terminal of the electric switch TN11 is connected to the nth column selection line LN, a second terminal of the electric switch TN11 is connected to a control terminal of the electric switch TN12, a first terminal of the electric switch TN12 is connected to the ground, and a second terminal of the second electric switch TN11 is connected to the power supply EC1 via a coil of the relay JN 1. The constant switch KN1 of the relay JN1 is connected in series to the power supply circuit of the electric control valve VN1 of the watertight bag body WN1 located in the nth row and the nth column, so that water inflow and water drainage of the watertight bag body WN1 located in the nth row and the nth column can be controlled.

The watertight bag body switch located on the first column of the M row comprises an electric switch T1M1 and an electric switch T1M 2, wherein the control end of the electric switch T1M1 is connected to the M row selection line PM, the first terminal of the electric switch T1M1 is connected to the 1 st column selection line L1, the second terminal of the electric switch T1M1 is connected to the control end of the electric switch T1M 2, the first terminal of the electric switch T1M 2 is connected to the ground, and the second terminal of the electric switch T1M1 is connected to the power supply EC1 through a coil of the relay J1M. The constant switch K1M of the relay J1M is connected in series to a power supply circuit of the electric control valve V1M of the watertight bag body W1M positioned in the M row and the 1 st column, so that water inlet and water drainage of the watertight bag body W1M positioned in the M row and the 1 st column can be controlled.

And by analogy, the watertight bag body switch positioned in the Mth row and the Nth column comprises an electric switch TNM1 and an electric switch TNM 2, wherein the control end of the electric switch TNM1 is connected with an Mth row selection line PM, the first terminal of the electric switch TNM1 is connected with an Nth column selection line LN, the second terminal of the electric switch TNM1 is connected with the control end of the electric switch TNM 2, the first terminal of the electric switch TNM 2 is connected with the ground, and the second terminal of the electric switch TNM1 is connected with a coil connected with a power supply EC1 through a relay JNM. The constant switch KNM of the relay JNM is connected in series to the power supply circuit of the electric control valve VNM of the watertight bladder WNM in the nth column of the mth row, so that the water inlet and the water outlet of the watertight bladder WNM in the nth column of the mth row can be controlled.

According to one embodiment of the invention, the control system further comprises a memory 108 for storing a control program for controlling the switches in the electric control valve circuit of the watertight compartment and a program for controlling the operation of the air pump. According to one embodiment of the invention, the control system further comprises an air pump driver for controlling the air pump 105, which driver provides control signals to the air pump 105 in accordance with instructions provided by the processor.

According to one embodiment of the present invention, the control system further includes a communication subsystem 110 for communicating with the host computer via a wireless or wired network to facilitate remote monitoring. When the communication subsystem is used for communication through a wireless network, the communication subsystem at least comprises a baseband unit and a radio frequency unit, the processor 102 is used for packaging the acquired buoyancy tank posture information, the position information and the state information of each watertight bag body of the buoyancy tank control system into frames and providing the frames for the baseband processing unit, the baseband processing unit is used for carrying out source coding, channel coding and other processing on the information provided by the processor to form a digital baseband signal and providing the digital baseband signal for the radio frequency unit, and the radio frequency unit is used for carrying out digital-to-analog conversion on the information provided by the baseband processing unit and modulating the digital-to-analog conversion on a high-frequency carrier wave, then sending the digital-to-analog conversion on the received instruction through an antenna, and then providing the digital signal to the baseband processing unit. The present invention is provided with a communication subsystem as described in detail below in connection with fig. 3.

Fig. 3 is a block diagram of the radio frequency circuit of the communication subsystem according to the present invention. The radio frequency circuit at least comprises a receiving antenna, a limiter 131, a first band-pass filter 132, a small signal amplifier 133, a frequency converter, a second band-pass filter 135, a detector 136, a low-pass filter 137, a low-frequency amplifier 138 and an analog-to-digital conversion circuit 139, wherein the receiving antenna is used for transmitting electromagnetic signals, converting the electromagnetic signals into high-frequency electric signals, and providing the high-frequency electric signals to the first band-pass filter 132 after being limited by the limiter 131, the first band-pass filter 132 takes out the high-frequency signals carrying modulated signals and provides the high-frequency signals to the small signal amplifier 133, the small signal amplifier 133 is used for amplifying the high-frequency signals provided by the first band-pass filter 132 and providing the high-frequency signals to the frequency converter, the frequency converter comprises a mixer 134 and a first high-frequency signal source, and the mixer 134 is used for mixing the high-frequency signals carrying the modulated signals with the first high-frequency signals generated by the first high-frequency signal source and providing the first high-frequency signals to the band-pass filter 135, in the invention, the mixer 134 is preferably a multiplier, and the band-pass filter 135 is used for filtering the low-frequency signals and the high-frequency signals, and the intermediate-frequency signals are taken out and provided to the detector 136. The first high frequency signal source includes at least a first phase-locked loop that generates a first high frequency signal according to a signal generated by the frequency source 122 and the first reference voltage Vf1, and includes a voltage-controlled oscillator (VCO) 140, a frequency divider 113, a phase detector 112, and a low-pass filter 111, each of which has a ratio of N, wherein the frequency source is preferably a crystal oscillator 122 that generates a constant-amplitude signal with a fixed frequency and provides the constant-amplitude signal to the phase detector 112; the Voltage Controlled Oscillator (VCO) 137 generates an oscillation signal based on the voltage supplied from the first reference Vf1 and the low-pass filter 111, and divides N by the frequency divider 113 and then supplies the oscillation signal to the phase detector 112, and the phase detector 112 compares phases of signals supplied from the frequency divider 113 and the crystal oscillator 122 and filters out high frequencies through the low-pass filter (LPF) 139 to generate a voltage signal that is linear with the phase difference, and the voltage signal is superimposed on Vf1 to further control a first high-frequency signal generated by the voltage controlled oscillator, which is supplied to the mixer 134 via the first buffer 114.

The detector 136 is configured to multiply the intermediate frequency signal provided by the band-pass filter 105 with the second high frequency signal, thereby generating a signal including the modulated signal, and provide the signal to the low-pass filter 137. The second high frequency signal is obtained by dividing the first high frequency signal by a divider 115 having a division ratio M, and the second high frequency signal is preferably supplied to a detector 136 via a buffer 116, and in the present invention, the detector 136 is preferably a multiplier.

The low-pass filter 137 is used to filter out high-frequency components in the signal supplied from the detector 136, and to extract a transmitted modulated signal, which is amplified by the low-frequency amplifier 138 and supplied to the analog-to-digital converter 139 for analog-to-digital conversion. The low frequency amplifier 138 controls its amplification according to the automatic gain control voltage AGC.

The radio frequency circuit further comprises a second high frequency signal source comprising the second phase locked loop generating a third high frequency signal from the signal generated by the frequency source 122 and the second reference voltage Vf2, the third high frequency signal being provided to the modulator 128, the modulator 128 modulating the signal to be transmitted onto the third high frequency signal to generate a high frequency modulated signal carrying information. The second phase locked loop includes a Voltage Controlled Oscillator (VCO) 123, a frequency divider 126, a phase detector 125 and a low pass filter 124, each having a ratio P, wherein the crystal oscillator 122 is configured to generate a fixed frequency signal and provide the fixed frequency signal to the phase detector 125; the Voltage Controlled Oscillator (VCO) 123 generates an oscillation signal based on the voltage supplied from the second reference Vf2 and the low-pass filter 124, and P-divides the voltage by the divider 126 and then supplies the phase detector 125, and the phase detector 1258 compares the phases of the signals supplied from the divider 126 and the crystal oscillator 122 and filters out the high frequency by the low-pass filter 124 to generate a voltage signal, which is superimposed on Vf2 to further control the third high frequency signal generated by the voltage controlled oscillator 123.

The radio frequency circuit further comprises a square wave signal generator comprising a third phase locked loop and a zero-crossing comparator 117, the third phase locked loop generating a fourth high frequency signal according to the signal generated by the frequency source and a third reference voltage Vf3, the fourth high frequency signal being provided to an inverting terminal (or non-inverting terminal) of the zero-crossing comparator 117, the non-inverting terminal (or non-inverting terminal) of the zero-crossing comparator 117 being connected to ground, an output terminal being adapted to provide a square wave signal to the digital-to-analog converter 139, the digital-to-analog converter 139 sampling the modulated signal demodulated by the detector using the square wave signal. The third phase-locked loop generates a fourth high-frequency signal according to the signal generated by the frequency source 122 and a third reference voltage, and includes a voltage-controlled oscillator (VCO) 120, a frequency divider 121 with a ratio K, a phase detector 118, and a low-pass filter 119, wherein the crystal oscillator 122 is used to generate a fixed frequency signal and provide the fixed frequency signal to the phase detector 118; the Voltage Controlled Oscillator (VCO) 120 generates an oscillation signal based on the voltage supplied from the third reference Vf3 and the low-pass filter 119, and K-divides the voltage by the divider 121 and then supplies the phase detector 118, and the phase detector 118 compares the phases of the signals supplied from the divider 121 and the crystal oscillator 122 and filters out the high frequency by the low-pass filter 119 to generate a voltage signal, which is superimposed with Vf3 to further control the fourth high frequency signal generated by the voltage controlled oscillator 120.

According to an embodiment, the radio frequency circuit further comprises a frequency divider with a frequency division ratio Q, which divides the third high frequency signal by Q to obtain a fifth high frequency signal, which is provided to the power amplifier 128, preferably via the buffer 127. The radio frequency circuit further comprises a digital-to-analog converter for digital-to-analog converting the signal provided by the baseband processing unit 130 into an analog signal, and the power amplifier 128 is configured to modulate the analog signal into a fifth high frequency signal, which is then sent to the transmitting antenna, where the signal provided by the power amplifier 128 is converted into an electromagnetic wave and sent to the air.

In the invention, the frequency division ratio M, N, K, P and Q are integers greater than 1, the specific numerical values are controlled by the processor according to the program, and the first reference voltage Vf1, the second reference voltage Vf2 and the third reference voltage Vf3 are all controlled by the processor according to the program. The radio frequency circuit provided by the invention generates the high-frequency signals with various frequencies by one frequency source, so that the cost is saved, the volume is miniaturized, and the integration is convenient. When the radio frequency circuit is formed as an integrated circuit, an inductance element, a crystal oscillator, or the like in the band-pass filter can be accessed from the outside of the integrated circuit.

Fig. 4 is a circuit diagram of a power amplifier provided by the present invention, as shown in fig. 4, the power amplifier: comprising a carrier frequency signal input terminal 201, a modulation signal input terminal 202, a power supply circuit 203, an amplifier 204, and a high frequency modulation signal output terminal 205. The high-frequency power amplifier 204 amplifies a signal input from the carrier frequency signal input terminal 201. The power supply circuit 203 amplifies an input signal input from the modulation signal input terminal 202 and outputs the amplified signal as a power supply to the amplifier 204. The amplifier 204 amplifies the high-frequency signal input from the high-frequency signal input terminal 201 based on the power output from the power supply circuit 203, and outputs the amplified high-frequency signal from the high-frequency modulation signal output terminal 105.

The power supply circuit 203 is described in detail below. The power supply circuit 203 includes a linear amplifier 206, a current detector 207, a current output unit 208, a low-pass filter 209, a synthesizer 210, and a power supply terminal 211. The linear amplifier 206 amplifies an input signal inputted from the high-system signal input terminal 202 and outputs the amplified input signal to the synthesizer 210. The current detector 207 detects a current value of an output signal output from the linear amplifier 206 to the synthesizer 210, and outputs a signal of the detection result to the current output unit 208. In addition, the current detector 207 directly outputs the output signal of the linear amplifier 206 to the synthesizer 210. The current output unit 208 outputs a current based on the detection result (i.e., the detected current value) detected by the current detector 207. That is, the current output unit 208 functions to amplify the current signal input to the power supply circuit 203. The low-pass filter 209 attenuates and outputs a high-frequency component of the output signal of the current output unit 208. The synthesizer 210 outputs electric power obtained by synthesizing the output of the linear amplifier 206 and the output of the low-pass filter 209 to the electric power supply terminal 211. The power supply terminal 211 is connected to the amplifier 104, and the power supply circuit 103 supplies power to the high-frequency power amplifier 104 through the power supply terminal 111.

Fig. 5 is a circuit diagram of the current output unit 208 and the low-pass filter 209 provided by the present invention. As shown in fig. 5, the current output unit 208 includes a first comparator 212, a second comparator 213, an inverter 214, a first switching amplifier 215, a second switching amplifier 216, and a DC power supply 217. The low-pass filter 209 includes a first low-pass filter 222 and a second low-pass filter 223. The current detector 207 detects a current value of an output signal output from the linear amplifier 206 to the synthesizer 210, and outputs a signal having a voltage corresponding to the detection result to the current output unit 208. Specifically, the current detector 207 increases the voltage of the output signal in response to an increase in the current value of the output signal of the linear amplifier 206, and decreases the voltage of the output signal in response to a decrease in the current value. The first comparator 212 performs high level/low level determination based on a prescribed threshold on the input output signal from the current detector 207, and outputs the determination result to the first switching amplifier 215. The second comparator 213 performs high/low level determination based on a set threshold on the input output signal from the current detection 207, and outputs the determination result to the second switching amplifier 216 via the inverter 214. The first switching amplifier 215 is input with an output from the first comparator 212. The first switching amplifier 215 outputs the signal whose input is amplified to the low-pass filter 209. In the second switching amplifier 216, the output from the second comparator 213 is inverted by the inverter 214 and input. The second switching amplifier 216 amplifies the signal input thereto and outputs the amplified signal to the low-pass filter 209.

Details of the first switching amplifier 215 and the second switching amplifier 216 will be described below. The first switching amplifier 215 includes an NMOS drive transistor 218 and a diode 219. The drain of the drive transistor 218 is connected to a DC power supply 217, the gate of the drive transistor 218 is connected to the first biaser 212, and the source of the drive transistor 218 is connected to the low pass filter 209 and to a diode 219. The diode 219 has its anode grounded and its cathode connected to the source of the driving transistor 218 and the low-pass filter unit 209. Since the first switching amplifier 215 has the above configuration, when a positive voltage equal to or higher than the threshold voltage is input to the gate of the driving transistor 118, the current from the DC power supply 217 (the drain side of the driving transistor 218) is the current of the low-pass filter unit 209 (the drain side of the driving transistor 118 of the driving transistor 218).

When a voltage equal to or higher than a set threshold voltage is input to the gate of the driving transistor 218, the time differential value of the current flowing through the low-pass filter 209 is positive, and otherwise, the time differential value of the current flowing through the first low-pass filter 209 is negative or zero. That is, when a voltage equal to or higher than a predetermined threshold voltage is input to the gate of the driving transistor 218, the first switching amplifier 215 increases the output current. Thus, the first switching amplifier 215 outputs a current according to the output signal from the first comparator 212. Note that the predetermined threshold voltage in the driving transistor 218 is a voltage between the voltage of the high level signal and the voltage of the low level signal output from the first comparator 212. Further, the first switching amplifier 215 outputs a current having a positive current value.

The DC power supply 217 is a common power supply for the first switching amplifier 215 and the second switching amplifier 216. A DC power supply 217 is connected to the drain of the drive transistor 218 and the cathode of the diode 220. The first low-pass filter 222 of the low-pass filter unit 209 attenuates the high-frequency component of the output signal of the first switching amplifier 215 and outputs the attenuated high-frequency component. The second low-pass filter 223 attenuates the high-frequency component of the output signal of the second switching amplifier 216 and outputs the attenuated high-frequency component. The output signals of the first low-pass filter 222 and the second low-pass filter 223 are synthesized in a synthesizer and output to the power supply terminal 211.

The invention is provided with the watertight bag bodies and the matrix control circuits which are arranged in a matrix, so that when the connecting structure is non-rigid, the balance of the buoyancy tank is controlled by controlling the water inlet condition and the water inlet quantity of the watertight bag bodies, thereby facilitating the buoyancy tank to sink stably. For example, when the buoyancy tank is high and low on the left side and low on the right side, the water inflow on the right side is indicated to be fast, so that the switch in the electric control valve passage of the watertight bag body on the right side can be turned off or the opening time is shortened, the water inflow is stopped or reduced, the switch in the electric control valve passage of the watertight bag body on the left side is turned on, the opening time is prolonged, water inflow is accelerated, when the buoyancy tank is parallel to the horizontal plane, the switches in the electric control valve passages of the watertight bag bodies on the two sides are all opened, the opening time is kept the same, and water is simultaneously introduced until the buoyancy tank is sunk to a set position. In order to make the buoyancy tank stable, the opening driving time of the electric control valve is sequentially increased along a certain direction according to the inclination angle of the buoyancy tank, for example, if the buoyancy tank is high left and low right, the opening time of the electric control valve is sequentially reduced from left to right. When the buoyancy tank needs to be retracted, air is injected into the air chamber of the watertight bag body, for example, air is injected to discharge water in the watertight bag body, and meanwhile, the buoyancy of the buoyancy tank is increased, so that the buoyancy tank floats and is retracted, resources are saved, and the water area cannot be polluted due to the abandoned buoyancy tank. The invention designs the matrix switch control circuit, which can conveniently control the water inflow and the water drainage of the watertight bag bodies in any row and any column, thereby conveniently controlling the sinking depth of the buoyancy tank.

The above embodiments are only for illustrating the present invention, wherein the structure, arrangement position, connection mode, etc. of each component may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. The watertight bag type buoyancy tank of the floating platform comprises a buoyancy tank main body, a connecting device and a communication subsystem, wherein the connecting device is used for connecting the floating platform and the buoyancy tank main body, and is characterized in that the buoyancy tank main body comprises a supporting structure formed by connecting girders and frameworks through connectors or hinging pieces to form M multiplied by N fixing pieces which are arranged in a matrix shape, the M multiplied by N fixing pieces are respectively used for fixing M multiplied by N watertight bag bodies, the M and the N are integers which are larger than 1, and the weight of the watertight bag bodies can be changed; the communication subsystem at least comprises a radio frequency circuit, the radio frequency circuit at least comprises a high-frequency power amplifier (204) and a power supply circuit (203) for supplying electric energy to the high-frequency power amplifier, the power supply circuit (203) comprises a linear amplifier (206), a current detector (207), a current output unit (208), a low-pass filter (209), a synthesizer (210) and a power supply terminal (211), and the linear amplifier (206) amplifies an input signal input from a modulation signal input terminal (202) and outputs the input signal to the synthesizer (210); the current detector (207) detects the current value of an output signal output by the linear amplifier (206) to the synthesizer (210), and outputs a signal having a voltage corresponding to the detection result to the current output unit (208); the current detector (207) directly outputs the output signal outputted from the linear amplifier (206) to the synthesizer (210); a current output unit (208) outputs a current according to the current value detected by the current detector (207); a low-pass filter (209) attenuates and outputs the high-frequency component of the output signal of the current output means (208); the synthesizer (210) outputs power obtained by synthesizing the output of the linear amplifier (206) and the output of the low-pass filter (209) to a power supply terminal (211).

2. The floating platform watertight bladder type buoyancy tank according to claim 1, wherein the watertight bladder body is a double bladder, wherein the bladder arranged inside the bladder is communicated with the air pump through an electric control valve, and the bladder arranged outside the bladder is communicated with water through a water inlet valve and a water outlet valve; when the buoyancy tank needs to be submerged, water is injected into the water bag, the air pump works under the control of the control system, and air in the air bag is pumped out to enable water outside the water bag to be injected into the water bag through the water inlet valve; when water is discharged from the outside of the water bag, the air pump injects air into the air bag so that water in the water bag is discharged to the outside through the drain valve, and the on-off of the electric control valve is controlled by the control system.

3. The floating platform watertight bladder buoyancy tank of claim 2, further comprising a control system comprising an attitude sensor, a height sensor, a processor, a row selector, a column selector, N column selection lines, M row selection lines, M X N watertight bladder switches, and a first power source, the attitude sensor for measuring rotational angles of the buoyancy tank about X, Y, and Z axes of a reference coordinate system, respectively, and providing the angular information to the processor; the height sensor is used for measuring the depth of the buoyancy tank structure sinking to the water surface and providing depth information for the processor; the processor provides control signals for the row selector and the column selector according to the information provided by the attitude sensor and the information provided by the height sensor so as to control the on-off of some or all of the M multiplied by N watertight bag body switches, so that some or all of the M multiplied by N watertight bag bodies can be filled with water or drained.

4. The floating platform watertight bladder buoyancy tank according to claim 1, wherein the current output unit (208) comprises a first comparator (212), a second comparator (213), an inverter (214), a first switching amplifier (215), a second switching amplifier (216) and a DC power supply (217); the low-pass filter (209) comprises a first low-pass filter (222) and a second low-pass filter (223); a first comparator (212) that performs high-level/low-level determination based on a set threshold value on an input output signal from the current detector (207), and outputs a determination result to a first switching amplifier (215); a second comparator (213) that performs high-level/low-level determination based on a set threshold value on an input output signal from the current detector (207), and outputs a determination result to a second switching amplifier (216) via an inverter (214); the first switching amplifier (215) is input with an output from the first comparator (212); the first switching amplifier (215) outputs the signal amplified by its input to the low-pass filter (209); in the second switching amplifier (216), the output from the second comparator (213) is inverted by the inverter (214) and then input, and the second switching amplifier (216) amplifies the input signal and then outputs the amplified signal to the low-pass filter (209).