Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention discloses a signal receiving system, a signal receiving method, signal receiving equipment and a signal receiving storage medium, which can stably detect a Schumann resonance signal, improve the signal-to-noise ratio of a test result and are simple and convenient to detect. The system comprises:
A superconducting quantum interference device for generating a first electrical signal upon detection of an electromagnetic signal;
the signal processing circuit comprises a target circuit unit with a target gain bandwidth product, wherein the signal processing circuit is used for amplifying the first electric signal into a second electric signal based on the target circuit unit;
and the signal analysis module is used for carrying out signal analysis on the second electric signal and determining a Schumann resonance signal based on a signal analysis result.
Still further, the system further comprises a thermostat, wherein the superconducting quantum interference device is arranged in the thermostat, the thermostat is coated with a preset number of insulating films, and the preset number of insulating films enable the bandwidth value of the superconducting quantum interference device to be matched with the frequency of the schumann resonance signal.
Further, the signal processing circuit further comprises a capacitor, and the capacitance value of the capacitor is determined based on the bandwidth value of the superconducting quantum interference device.
Furthermore, the superconducting quantum interference device is provided with three superconducting quantum interference devices which are respectively arranged on three surfaces of the supporting piece and are mutually perpendicular.
The application also provides a signal receiving method, which is realized based on the signal receiving system, and comprises the following steps:
Receiving a first electric signal output by the superconducting quantum interference device;
Amplifying the first electrical signal into the second electrical signal based on the target circuit unit having the target gain-bandwidth product; the signal processing slew rate of the signal processing circuit is matched with the target gain bandwidth product;
And the signal analysis module is used for carrying out signal analysis on the second electric signal and determining a Schumann resonance signal based on a signal analysis result.
Still further, the amplifying the first electrical signal by a preset gain to generate the second electrical signal includes:
Acquiring a current bandwidth value of the superconducting quantum interference device;
And determining the capacitance value of the capacitor based on the current bandwidth value so as to enable the signal processing circuit to be in a critical damping state.
Further, the signal analysis result comprises a plurality of preset electromagnetic signals with different frequencies;
The method comprises the steps of sending the second electric signal to the signal analysis module, enabling the signal analysis module to conduct signal analysis on the second electric signal, determining a Schumann resonance signal based on a signal analysis result, and comprising the following steps:
and the signal analysis module is used for extracting the Schumann resonance signals from a plurality of preset electromagnetic signals with different frequencies based on the frequencies of the Schumann resonance signals.
Still further, the method further comprises:
And determining the preset layer number of the insulating film based on the bandwidth value of the superconducting quantum interference device, wherein the insulating film with the preset layer number enables the bandwidth value of the superconducting quantum interference device to be matched with the frequency of the Schumann resonance signal.
In a third aspect, the present application also provides an electronic device, the device comprising a processor and a memory, the memory storing at least one instruction, at least one program, a set of codes or a set of instructions, the at least one instruction, the at least one program, the set of codes or the set of instructions being loaded and executed by the processor to implement a signal receiving method as described above.
In a fourth aspect, the present application also provides a computer readable storage medium, wherein at least one instruction, at least one program, code set, or instruction set is stored in the storage medium, the at least one instruction, at least one program, code set, or instruction set being loaded by a processor and performing a signal receiving method as described above.
The implementation of the invention has the following beneficial effects:
the receiving system comprises a superconducting quantum interference device, a signal processing circuit and a signal analysis module, wherein the superconducting quantum interference device has the characteristics of high sensitivity and the like, the superconducting quantum interference device is used for collecting electromagnetic signals of target signals, so that the signal to noise ratio of a signal test result can be improved, in addition, the signal processing circuit is provided with a target circuit unit with a target gain bandwidth product, the target gain bandwidth product is increased, so that the signal processing slew rate of the signal processing circuit is improved, and the stability of the system for receiving the Schumann resonance signals is further improved.
Detailed Description
In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, shall fall within the scope of the application.
In the embodiment, the technical problem to be solved by the invention is that the Schumann resonance signal can be stably detected, the signal-to-noise ratio of a test result is improved, the detection is simple and convenient, the system comprises a superconducting quantum interference device used for generating a first electric signal when an electromagnetic signal is detected, the superconducting quantum interference device has extremely high sensitivity and can be selected from a low-temperature superconducting quantum interference device and a high-temperature superconducting quantum interference device according to the required working temperature of the superconducting quantum interference device, wherein the sensitivity of the low-temperature superconducting quantum interference device can be better than 1fT/Hz1/2, the sensitivity of the high-temperature superconducting quantum interference device also reaches 10fT/Hz1/2, and weak signals in an earth magnetic field can be detected.
The signal processing circuit is electrically connected with the superconducting quantum interference device and is used for providing bias voltage and feedback current for the superconducting quantum interference device, so that the superconducting quantum interference device can transmit a first electric signal to the signal processing module based on the collected electromagnetic signal, the signal processing circuit comprises a target circuit unit with a target gain bandwidth product, the target circuit processing unit comprises a chip arranged in the signal processing circuit and is used for amplifying the first electric signal into a second electric signal based on the target circuit unit, the electromagnetic signal is converted into a voltage signal under the general condition, the Schumann resonance signal is determined by collecting the voltage signal, the collected signal is weak, and the converted first electric signal is weak, so that the measured first electric signal needs to be amplified for accurately detecting the target signal, the relation between the signal processing slew rate of the signal processing circuit and the target gain bandwidth product is as shown in the following formula:
wherein,For signal processing slew rate, δV is the signal amplitude of the superconducting quantum interference device, GBP is the target gain bandwidth product, Mf is the mutual inductance of the superconducting quantum interference device, and Rf is the feedback resistor of the signal processing circuit.
As can be seen from the above, the target gain bandwidth product is improved, and the slew rate of the signal processing circuit is also improved, and by this embodiment, the slew rate of the signal processing circuit reaches 1mT/S, so that the signal receiving system can stably operate under the high-frequency interference of the earth magnetic field.
The signal processing circuit is provided with a target circuit unit with a target gain bandwidth product, the signal processing slew rate of the signal processing circuit can be improved, and the stability of the system for receiving the Schumann resonance signal is further improved.
In one embodiment, the system further comprises a thermostat, the superconducting quantum interference device is arranged at the bottom of the thermostat, preferably the thermostat is a nonmagnetic Dewar, if the superconducting quantum interference device is a low-temperature superconducting quantum interference device, cooling liquid in the nonmagnetic Dewar is liquid nitrogen, if the superconducting quantum interference device is a high-temperature superconducting quantum interference device, the cooling liquid in the nonmagnetic Dewar is liquid helium, the nonmagnetic Dewar is coated with an insulating film with a preset layer number, the insulating film is a super insulating film, the super insulating film carries out radio frequency shielding on the system, a larger bandwidth is ensured on the basis of ensuring good shielding, the super insulating film with the preset layer number can meet the condition that the bandwidth value of the superconducting quantum interference device is attenuated in a third-order exponential manner, the bandwidth value of the attenuated superconducting quantum interference device is matched with the frequency of a Schumann resonance signal, the frequency of the Schumann resonance signal is within the frequency range which can be detected by the superconducting quantum interference device, and as a preferred embodiment, the layer number is 40, when the super insulating film with the preset layer number of 40 (about 50 nm) is adopted, the bandwidth of the superconducting quantum interference device can meet the condition that the superconducting quantum interference device can receive more complex signals in a high-frequency environment or the superconducting quantum interference system can receive more complex, and the superconducting quantum interference system can receive more normal signals.
In one embodiment, the signal processing circuit further comprises a capacitor, wherein the capacitance value of the capacitor is determined based on the bandwidth value of the superconducting quantum interference device, when the signal processing circuit affects the stability of the system under the underdamping condition, oscillation is easy to cause, and when the system is over-damped, the bandwidth of the system is limited, so that the slew rate of the system is reduced, the current bandwidth value of the system is required to be determined before the capacitance value is determined, the capacitance value is determined based on the current bandwidth value, and the corresponding capacitance device is selected according to the capacitance value, so that the circuit achieves a critical damping state, and the stability of the system is further improved.
In one embodiment, three superconducting quantum interference devices are arranged and are respectively arranged on three surfaces of the supporting piece, the three surfaces are mutually perpendicular, the three quantum interference devices form a triaxial magnetometer and are electrically connected with the signal processing circuit, electromagnetic signals in the east-west direction, the north-south direction and the vertical direction are respectively collected through multiple channels, the accuracy of data collection is improved, the superconducting quantum interference devices are micro-nano processing devices, the size is small, triaxial integration can be conveniently achieved, and orthogonality among three axes is guaranteed.
The application has the concrete implementation process that the cooling liquid and the triaxial magnetometer are placed at the bottom of the thermostat, the cooling liquid is used for ensuring the constant temperature of the thermostat, three channels of the triaxial magnetometer are respectively and electrically connected with the signal processing circuit, the signal processing circuit is electrically connected with the signal analysis module, because the superconducting quantum interference device is a vector sensor, in order to reduce the influence of system vibration on a test result, damping measures are needed to be adopted on the system, and when the system is in concrete implementation, the system is buried or semi-buried in the ground so as to reduce the influence of ground vibration and wind noise, the test accuracy is improved, the signal processing circuit provides bias voltage and feedback current for the triaxial magnetometer, the triaxial magnetometer converts the acquired electromagnetic signal into a first electric signal, the first electric signal is read through the signal processing circuit, the first electric signal is amplified into a second electric signal through the signal processing circuit, the second electric signal is analyzed through the signal analysis module, and the schumann resonance signal is determined in the signal analysis result.
The application also provides a signal receiving method, which is realized based on the signal receiving system, and referring to fig. 2, the method comprises the following steps:
s110, receiving a first electric signal output by the superconducting quantum interference device;
the execution main body is a signal processing circuit, the collected electromagnetic signals are converted into first electric signals through the superconducting quantum interference device, the first electric signals are voltage signals in general, and the signal processing circuit receives the first electric signals output by the superconducting quantum interference device.
S120, amplifying the first electric signal into a second electric signal based on a target circuit unit with a target gain bandwidth product;
The method comprises the steps of setting a target circuit unit with a target gain bandwidth product in a signal output circuit, wherein the signal processing slew rate of a signal processing circuit is matched with the target gain bandwidth product, which means that the larger the target gain bandwidth product of the target circuit unit is, the larger the corresponding target gain bandwidth product is, and the stability of system test is further improved, the target gain bandwidth product is also related to the target gain, and amplifying a first electric signal by the target gain based on the target circuit unit with the target gain bandwidth product, so as to obtain a second electric signal.
S130, sending the second electric signal to a signal analysis module so that the signal analysis module performs signal analysis on the second electric signal and determines a Schumann resonance signal based on a signal analysis result;
The signal processing circuit sends the second electric signal to the signal analysis module, the signal analysis module carries out signal analysis on the second electric signal, and the Schumann resonance signal is determined in the signal analysis result.
Still further, before step S120, the method further includes:
s210, acquiring a current bandwidth value of a superconducting quantum interference device;
During the operation of the system, the bandwidth has a certain attenuation, so that the current bandwidth value of the superconducting quantum interference device needs to be measured again.
S220 determines a capacitance value of the capacitor based on the current bandwidth value, so that the signal processing circuit is in a critical damped state.
The capacitance value of the capacitor is determined based on the bandwidth value of the superconducting quantum interference device, when the signal processing circuit influences the stability of the system under the underdamping condition, oscillation is easy to cause, and the bandwidth of the system can be limited under the condition of over damping of the system, so that the slew rate of the system is reduced, the current bandwidth value of the system is required to be determined before the capacitance value is determined, and the capacitance value is determined based on the current bandwidth value, so that the circuit reaches a critical damping state, and the stability of the system is further improved.
Preferably, the signal analysis result comprises a plurality of preset electromagnetic signals with different frequencies, electromagnetic information of other signals can be detected while the superconducting quantum interference device collects the Schumann resonance signals, and the superconducting quantum interference device can convert the electromagnetic information of all the signals which can be detected into first electric signals and output the first electric signals to the signal processing module.
And the signal analysis module is used for carrying out signal analysis on the second electric signal, determining a Schumann resonance signal based on the signal analysis result and comprising the following steps:
s131, sending the second electric signal to a signal analysis module so that the signal analysis module extracts the Schumann resonance signals from a plurality of preset electromagnetic signals with different frequencies based on the frequencies of the Schumann resonance signals;
The signal processing module converts the first electric signal into the second electric signal, then sends the second electric signal to the signal analysis module for signal analysis, carries out fast Fourier transform on the second telecommunication to obtain the frequency spectrum of the Schumann resonance signal, finally displays the obtained frequency spectrum of the Schumann resonance signal on the display module, the signal analysis result is the frequency spectrum of the Schumann resonance signal, the signal analysis result comprises a plurality of preset electromagnetic signals with different frequencies, the test result is shown in figure 3, the frequency of the Schumann resonance signal is generally between 8 and tens of Hz based on the frequency of the Schumann resonance signal, and the signal analysis module determines the Schumann resonance signal according to the frequency of the Schumann resonance in a plurality of preset electromagnetic signals with different frequencies, so that the signal processing module has simple algorithm and better observation effect.
Still further, the method further comprises:
s310, determining the preset layer number of the insulating film based on the bandwidth value of the superconducting quantum interference device, wherein the insulating film with the preset layer number enables the bandwidth value of the superconducting quantum interference device to be matched with the frequency of a Schumann resonance signal;
The insulating film with the preset layer number is coated on the thermostat to ensure larger bandwidth on the basis of ensuring good shielding, the super insulating film with the preset layer number can meet the requirement that the bandwidth value of the superconducting quantum interference device is in three-order exponential decay, the bandwidth value of the superconducting quantum interference device after decay is matched with the frequency of the Schumann resonance signal, the frequency of the Schumann resonance signal is in the frequency range which can be detected by the superconducting quantum interference device, the system can ensure enough width in a complex geomagnetic environment, the system can detect very low frequency (3-30 KHz) signals besides the very low frequency signals of the Schumann resonance signal, and the variety of signal types received by the signal receiving system is improved, and the test result of the very low frequency signals is shown in figure 4.
The implementation of the embodiment has the following effects:
1. the receiving system of the application is composed of a superconducting interference device, a signal processing circuit and a signal analysis module, the structure is simple, the superconducting quantum interference device has the characteristics of high sensitivity, small volume and the like, the superconducting quantum interference device is used for collecting electromagnetic signals of target signals, so that the signal to noise ratio of signal test results can be improved, in addition, the signal processing circuit is provided with a target circuit unit with a target gain bandwidth product, the signal processing slew rate of the signal processing circuit can be improved, and the stability of the system for receiving Schumann resonance signals is further improved.
2. The superconducting quantum interferometer is arranged in the nonmagnetic Dewar, the insulating film with the preset layer number is coated on the nonmagnetic Dewar, the insulating film is used for carrying out radio frequency shielding on the system, a large bandwidth is ensured on the basis of ensuring good shielding, the bandwidth is increased, the system can detect signals with higher frequency, and the variety of the signals received by the system is improved.
3. The signal processing circuit reaches a critical damping state by adjusting the capacitance value, so that the stability of the system detection signal is further improved.
4. The three superconducting quantum interference devices are arranged to form a triaxial magnetometer, the three superconducting quantum interference devices respectively collect electromagnetic signals in the east-west direction, the north-south direction and the vertical direction, and the three superconducting quantum interference devices are respectively and electrically connected with the signal processing module to form a plurality of signal collection channels, so that the accuracy of system data collection is improved.
Embodiments of the present invention also provide an electronic device including a processor and a memory having stored therein at least one instruction, at least one program, code set, or instruction set, the at least one instruction, at least one program, code set, or instruction set being loaded and executed by the processor to implement a signal receiving method as in the method embodiments.
Embodiments of the present invention also provide a storage medium that may be disposed in a server to store at least one instruction, at least one program, a code set, or an instruction set for implementing the signal receiving method in the method embodiment, where the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement the signal receiving method provided in the method embodiment.
Alternatively, in this embodiment, the storage medium may be located in at least one network server among a plurality of network servers of the computer network. Alternatively, in the present embodiment, the storage medium may include, but is not limited to, a U disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, etc. various media that can store program codes.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing description has fully disclosed specific embodiments of this invention. It should be noted that any modifications to the specific embodiments of the invention may be made by those skilled in the art without departing from the scope of the invention as defined in the appended claims. Accordingly, the scope of the claims of the present invention is not limited to the foregoing detailed description.