CN203825190U - Near-field electromagnetic ranging device - Google Patents
Near-field electromagnetic ranging device Download PDFInfo
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- CN203825190U CN203825190U CN201320773118.9U CN201320773118U CN203825190U CN 203825190 U CN203825190 U CN 203825190U CN 201320773118 U CN201320773118 U CN 201320773118U CN 203825190 U CN203825190 U CN 203825190U
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- 238000001514 detection method Methods 0.000 claims abstract description 44
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- 230000003321 amplification Effects 0.000 claims description 52
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 52
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- 238000007781 pre-processing Methods 0.000 abstract 3
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- 239000002184 metal Substances 0.000 description 1
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- 230000003071 parasitic effect Effects 0.000 description 1
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Abstract
The utility model discloses a near-field electromagnetic ranging device, and the device comprises a signal receiving module, a signal processing module, and a distance detection module, wherein the signal receiving module, the signal processing module and the distance detection module are sequentially connected together. The signal receiving module is used for receiving an external electromagnetic signal, and outputting a magnetic-field component of the electromagnetic signal and an electric-field component of the electromagnetic signal. The signal processing module is used for receiving the magnetic-field component and the electric-field component, which are outputted by the signal receiving module, and respectively outputting the magnetic-field component and the electric-field component after preprocessing to the distance detection module. The preprocessing comprises a step of calibrating of the magnetic-field component and/or the electric-field component. The distance detection module is used for determining a distance between an electromagnetic transmitter and the signal processing module according to an output signal after the signal processing module carries out the preprocessing of the magnetic-field component and the electric-field component. Through the above technical scheme, the device provided by the utility model solves a technical problem that a ranging mode in the prior art is not good.
Description
Technical field
The utility model relates to electronic device field, relates in particular to a kind of near field electromagnetic positioning device.
Background technology
Along with social development, people are more and more to the demand of location technology, and real-time positioning system (RTLS) is also in fast development, and RTLS is a kind of radiolocation means based on signal, can adopt active, or passive induction type.The active AOA(that is divided into arrives angle orientation) and TDOA(time of arrival poor location), TOA(time of arrival), TW-TOF (two-way flight time) etc.The signal frequency range adopting as the UWB technology of current main flow is higher, the wave band of himself has limited the transmission of signal under complex environment, when running into barrier or stopping, show stronger reflectivity, and it is diffractive poor, therefore NLOS(Non-Line of Sight, non line of sight) under condition, the positioning precision of UWB can be obviously limited.Passive induction type is based on the signal intensity location of finding range, and this mode is easily subject to the impact of the barrier such as water, metal, thereby occurs deviation, and precision is lower.
Utility model content
The utility model provides a kind of near field electromagnetic positioning device, solves the perfect not technical matters of distance measuring method in prior art.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
A kind of near field electromagnetic positioning device, comprises the signal receiving module that connects successively, signal processing module and apart from detection module; Signal receiving module is used for the magnetic-field component and the electric field component that receive external electromagnetic signal and export described electromagnetic signal; Signal processing module is for receiving described magnetic-field component and the electric field component of signal receiving module output, described magnetic-field component and electric field component are preset after processing and exported to respectively apart from detection module, and described default processing comprises calibrates described magnetic-field component and/or electric field component; Apart from detection module for according to signal processing module to described magnetic-field component and electric field component preset output signal after treatment definite with described electromagnetic signal transmit leg between distance.
Further, described signal receiving module comprises the first antenna and the second antenna; The first antenna is used for receiving external electromagnetic signal, exports signal processing module in response to the magnetic-field component of described electromagnetic signal and by described magnetic-field component; The second antenna is used for receiving external electromagnetic signal, exports signal processing module in response to the electric field component of described electromagnetic signal and by described electric field component;
Or described signal receiving module comprises third antenna and signal separation module, third antenna is used for receiving external electromagnetic signal and exports signal separation module to; Signal separation module is used for isolating magnetic-field component and electric field component from described electromagnetic signal, and exports signal processing module to.
Further, signal processing module exports the first branch road apart from detection module to after comprising the magnetic-field component for receiving signal receiving module output and presetting processing, and exports the second branch road apart from detection module to after receiving the electric field component of signal receiving module output and presetting processing; Described the first branch road and/or the second branch road comprise calibration module, for component signal corresponding on the branch road of place is calibrated.
Further, the first branch road, the second branch road also comprise respectively: the first filtration module, the first amplification module and automatic gain control module; The first filtration module is for carrying out filtering to component signal corresponding on the branch road of place; The first amplification module is used for amplifying through the filtered signal of the first filtration module on the branch road of place; Automatic gain control module is for carrying out automatic gain control to the signal after the first amplification module amplifies on the branch road of place; Calibration module exports to apart from detection module after the signal of automatic gain control module output on the branch road of place is calibrated.
Further, the first branch road, the second branch road also comprise respectively: be connected to frequency mixing module, the second filtration module, the second amplification module and the 3rd filtration module between the first amplification module and automatic gain control module in turn; Frequency mixing module is used for the signal after the first amplification module amplifies and default reference frequency signal on the branch road of place to carry out mixing, and exports mixed frequency signal to the second filtration module; The second filtration module is for carrying out filtering to the mixed frequency signal of place branch road uppermixing module output; The second amplification module is used for amplifying through the filtered signal of the second filtration module on the branch road of place; The 3rd filtration module is used for the signal after the second amplification module amplifies on the branch road of place to carry out filtering, then exports automatic gain control module to.
Further, the mixed frequency signal of frequency mixing module output is intermediate-freuqncy signal.
Further, described near field electromagnetic positioning device also comprises: oscillator, and for the frequency mixing module output reference frequency signal to the first branch road and the second branch road respectively.
Further, described near field electromagnetic positioning device also comprises: the signal quality detector module being connected with signal receiving module or signal processing module, and for detecting respectively the magnetic-field component of described electromagnetic signal and the signal quality of electric field component.
Further, described near field electromagnetic positioning device also comprises judge module and logging modle, and judge module is connected with signal quality detector module, and for judging whether the magnetic-field component of described electromagnetic signal and the signal quality of electric field component meet preset requirement; Logging modle, in the time that the magnetic-field component of described electromagnetic signal and the signal quality of electric field component all meet preset requirement, records the channel information of described electromagnetic signal.
Further, described near field electromagnetic positioning device also comprises configuration module and/or sending module; Configuration module receives and/or transmitting channel for the electromagnetic signal of utilizing the channel information of logging modle record to configure described near field electromagnetic positioning device; Sending module, for the channel information of logging modle record is transferred to external device (ED), receives and/or transmitting channel for the electromagnetic signal that configures described external device (ED).
Further, comprise comparison module and distance detector apart from detection module, comparison module is for comparing through signal processing module magnetic-field component after treatment and electric field component and exporting difference characteristic; Distance detector is for receiving described difference characteristic and utilizing described difference characteristic information to determine the distance between described electromagnetic signal transmit leg;
And/or described the first branch road and the second branch road also comprise respectively analog-to-digital conversion module, analog-to-digital conversion module for exporting to apart from detection module on the branch road of place after default component signal after treatment converts digital signal to; And comprise digital signal processor apart from detection module, determine the distance between described electromagnetic signal transmit leg for the digital signal of exporting respectively according to described the first branch road and the second branch road.
The near field electromagnetic positioning device that the utility model provides, utilizes the magnetic-field component of the electromagnetic signal receiving and electric field component to determine the distance between this electromagnetic signal transmit leg, realizes location.Middle UWB, locator meams based on signal intensity compared to existing technology, near field electromagnetic positioning penetration power and jamproof performance are stronger.Especially under non line of sight condition, can penetrate restraining mass finds range.In order to improve distance accuracy, the near field electromagnetic positioning device that the utility model provides is also calibrated the magnetic-field component for finding range and/or electric field component, utilizes the signal after calibration to find range, the error of introducing in erasure signal reception, processing procedure.
Brief description of the drawings
The schematic diagram of the near field electromagnetic positioning device that Fig. 1 provides for the utility model one embodiment;
The schematic diagram of the near field electromagnetic positioning device that Fig. 2 provides for another embodiment of the utility model;
The schematic diagram of the near field electromagnetic positioning device that Fig. 3 provides for another embodiment of the utility model;
The schematic diagram of the near field electromagnetic positioning device that Fig. 3 provides for another embodiment of the utility model;
The schematic diagram of the near field electromagnetic positioning device that Fig. 4 provides for another embodiment of the utility model;
The schematic diagram of the near field electromagnetic positioning device that Fig. 5 provides for another embodiment of the utility model;
The schematic diagram of the near field electromagnetic positioning device that Fig. 6 provides for another embodiment of the utility model;
The schematic diagram of the near field electromagnetic positioning device that Fig. 7 provides for another embodiment of the utility model;
The schematic diagram of the near field electromagnetic positioning device that Fig. 8 provides for another embodiment of the utility model;
The schematic diagram of the near field electromagnetic positioning device that Fig. 9 provides for another embodiment of the utility model;
The schematic diagram of the near field electromagnetic positioning device that Figure 10 provides for another embodiment of the utility model.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail below by embodiment.
The schematic diagram of the near field electromagnetic positioning device that Fig. 1 provides for the utility model one embodiment, please refer to Fig. 1, and near field electromagnetic positioning device 1 comprises the signal receiving module 11 that connects successively, signal processing module 12 and apart from detection module 13; Wherein, signal receiving module 11 is for receiving external electromagnetic signal and exporting magnetic-field component and the electric field component of described electromagnetic signal; Described magnetic-field component and electric field component that signal processing module 12 is exported for receiving signal receiving module 11, described magnetic-field component and electric field component are preset after processing and exported to respectively apart from detection module 13, and this is default processes and comprises described magnetic-field component and/or electric field component are calibrated; Determine the distance between described electromagnetic signal transmit leg apart from detection module 13 for described magnetic-field component and electric field component being preset to output signal after treatment according to signal processing module 12.Signal processing module 12 is exported to apart from can being proportional with magnetic-field component, electric field component or having simulating signal or the digital signal of correlativity of detection module 13, and for example output represents that the voltage signal, current signal, impedance signal, digital signal of magnetic-field component, electric field component feature etc. is to apart from detection module 13.
In certain embodiments, signal receiving module 11 comprises the first antenna and the second antenna; The first antenna is used for receiving external electromagnetic signal, exports signal processing module 12 in response to the magnetic-field component of described electromagnetic signal and by described magnetic-field component; The second antenna is used for receiving external electromagnetic signal, exports signal processing module 12 in response to the electric field component of described electromagnetic signal and by described electric field component.The first antenna can be the sensor that tours antenna or other can receive magnetic component; The second antenna can be the sensor that monopole, dipole antenna or other can receive electric signal.
In further embodiments, signal receiving module 11 comprises third antenna and signal separation module, and third antenna is used for receiving external electromagnetic signal and exports signal separation module to; Signal separation module is used for isolating magnetic-field component and electric field component from described electromagnetic signal, and exports signal processing module 12 to.In this embodiment, third antenna is not distinguished magnetic-field component and electric field component, but has signal separation module to distinguish.
Preferably 500KHz to 50MHz of the frequency range of the electromagnetic signal that signal receiving module 11 receives.
In certain embodiments, signal processing module 12 comprises for receiving the magnetic-field component that signal receiving module 11 exports and presetting after processing and exports the first branch road apart from detection module 13 to, and exports the second branch road apart from detection module 13 to after receiving the electric field component that signal receiving module 11 exports and preset processing; Described the first branch road and/or the second branch road comprise calibration module, for component signal corresponding on the branch road of place is calibrated.Fig. 2 is an embodiment wherein, and in this embodiment, signal receiving module 11 comprises the first antenna 111 and the second antenna 112; Signal processing module 12 comprises the first branch road and the second branch road, and the first branch road comprises the first calibration module, and the second branch road comprises the second calibration module; The first antenna 111, for receiving the electromagnetic signal that foreign frequency is 500KHz to 50MHz, exports signal processing module 12 in response to the magnetic-field component of described electromagnetic signal and by described magnetic-field component; The second antenna 112, for receiving outside same electromagnetic signal, exports signal processing module 12 in response to the electric field component of described electromagnetic signal and by described electric field component; The first calibration module, for calibrating the magnetic-field component on the first branch road; The second calibration module, for the electric field component on the second branch road is calibrated, exports to apart from detection module 13 through the signal of calibration on the first branch road, the second branch road.
The use of calibration module can further improve the accuracy of range finding, and the error that is mainly used in introducing in reception to electromagnetic signal, processing procedure is calibrated, and levels of collimation can be configured according to actual needs.Calibration module is mainly used in the phase place of signal to calibrate, and amplitude or other features that can certainly be used for signal are calibrated.Calibration module is including, but not limited to calibrating device, and preferred, calibration module is a phase shifter, can be by different values being set in order to calibrate the parasitic phase shift of magnetic-field component, electric field component, and calibration value can be configured by microprocessor.
In further embodiments, the first branch road, the second branch road also comprise respectively: the first filtration module, the first amplification module and automatic gain control module; Fig. 3 is an embodiment wherein, wherein, the first branch road comprises the first filtration module, the first amplification module, automatic gain control module and the first calibration module successively, the first filtration module on this branch road is for carrying out exporting the first amplification module on this branch road to after filtering to the magnetic-field component of signal receiving module output, and the first amplification module on this branch road exports the automatic gain control module on this branch road to for after this filtered signal is amplified; Automatic gain control module on this branch road is for carrying out exporting the first calibration module to after automatic gain control (automatic gain control, AGC) to the signal after amplifying; The first calibration module exports to apart from detection module 13 after the signal of this automatic gain control module output is calibrated.The second branch road comprises the first filtration module, the first amplification module, automatic gain control module and the second calibration module successively, the first filtration module on this branch road is for carrying out exporting the first amplification module on this branch road to after filtering to the electric field component signal of signal receiving module output, and the first amplification module on this branch road exports the automatic gain control module on this branch road to for after this filtered signal is amplified; Automatic gain control module on this branch road is for carrying out exporting the second calibration module to after automatic gain control to the signal after amplifying; The second calibration module exports to apart from detection module 13 after the signal of this automatic gain control module output is calibrated.In another embodiment, automatic gain control module can be saved.
The first filtration module has selecting frequency characteristic, can allow that selected frequency band signals passes through, and suppresses non-selected frequency band signals.Can be bandpass filter or low-pass filter, also can comprise trapper.The first amplification module has low noise figure and higher gain, is conducive to improve the receiving sensitivity of whole system.The first amplification module can be amplifier, for example low noise amplifier.Automatic gain control module has automatic controllable gain, keeps the signal of output in stable amplitude, improves the dynamic range of whole receiver.Automatic gain control module can be AGC ring.
In further embodiments, the first branch road, the second branch road also comprise respectively: be connected to frequency mixing module, the second filtration module, the second amplification module and the 3rd filtration module between the first amplification module and automatic gain control module in turn.Fig. 4 is an embodiment wherein, comparing Fig. 3 difference is, wherein, the first branch road comprises the first filtration module, the first amplification module, frequency mixing module, the second filtration module, the second amplification module, the 3rd filtration module, automatic gain control module and the first calibration module successively, the first filtration module on this branch road is for carrying out exporting the first amplification module on this branch road to after filtering to the magnetic-field component of signal receiving module output, and the first amplification module on this branch road exports the frequency mixing module on this branch road to for after this filtered signal is amplified; Frequency mixing module on this branch road is for carrying out mixing by the signal after this amplification and default reference frequency signal, and exports mixed frequency signal to the second filtration module on this branch road; The second filtration module on this branch road is for carrying out exporting the second amplification module on this branch road to after filtering to this mixed frequency signal; The second amplification module on this branch road exports the 3rd filtration module on this branch road to for after this filtered signal is amplified; The 3rd filtration module on this branch road is for carrying out exporting the automatic gain control module on this branch road to after filtering to the signal after this amplification; Automatic gain control module on this branch road is for carrying out exporting the first calibration module to after automatic gain control to this filtered signal; The first calibration module exports to apart from detection module 13 after the signal of this automatic gain control module output is calibrated.The second branch road comprises the first filtration module, the first amplification module, frequency mixing module, the second filtration module, the second amplification module, the 3rd filtration module, automatic gain control module and the second calibration module successively, the first filtration module on this branch road is for carrying out exporting the first amplification module on this branch road to after filtering to the electric field component of signal receiving module output, and the first amplification module on this branch road exports the frequency mixing module on this branch road to for after this filtered signal is amplified; Frequency mixing module on this branch road is for carrying out mixing by the signal after this amplification and default reference frequency signal, and exports mixed frequency signal to the second filtration module on this branch road; The second filtration module on this branch road is for carrying out exporting the second amplification module on this branch road to after filtering to this mixed frequency signal; The second amplification module on this branch road exports the 3rd filtration module on this branch road to for after this filtered signal is amplified; The 3rd filtration module on this branch road is for carrying out exporting the automatic gain control module on this branch road to after filtering to the signal after this amplification; Automatic gain control module on this branch road is for carrying out exporting the second calibration module to after automatic gain control to this filtered signal; The second calibration module exports to apart from detection module 13 after the signal of this automatic gain control module output is calibrated.
Frequency mixing module can be frequency mixer, preferred, and the mixed frequency signal of frequency mixing module output is intermediate-freuqncy signal.The second filtration module has selecting frequency characteristic, receives only the intermediate-freuqncy signal after mixing, suppresses the signal in other non-passband.The 3rd filtration module has selecting frequency characteristic, receives only the intermediate-freuqncy signal after the second amplification module amplifies, and suppresses the signal in other non-passband.The second filtration module, the 3rd filtration module can be wave filters, can select crystal filter, it is characterized by extremely narrow bandwidth, more preferably in passband, have constant group delay.The intermediate-freuqncy signal of the 3rd filtration module output is as the input of automatic gain control module.The electromagnetic signal that the present embodiment receives signal receiving module by frequency mixing module, the second filtration module, the second amplification module and the 3rd filtration module is adjusted to intermediate frequency, carries out phase bit comparison based on intermediate-freuqncy signal.In practical application, also can save frequency mixing module, the second filtration module, the second amplification module and the 3rd filtration module, like this near field electromagnetic positioning device directly carries out phase bit comparison in working frequency points to two paths of signals.
In further embodiments, near field electromagnetic positioning device 1 also comprises: oscillator, and for the frequency mixing module output reference frequency signal to the first branch road and the second branch road respectively.As shown in Figure 5.Oscillator can be the frequency generator based on phaselocked loop (PLL), and direct digital synthesiser (DDS) can need to be chosen preferred frequency range according to application, can adjust different frequent points.The frequency of oscillator can be configured by microprocessor, also can automatically switch by the frequency order pre-setting.Oscillator can be also the crystal oscillator of fixing output frequency, can be for the positioning system of some fixing frequency.
In further embodiments, near field electromagnetic positioning device 1 also comprises: the signal quality detector module being connected with signal receiving module 11 or signal processing module 12, and for detecting respectively the magnetic-field component of electromagnetic signal and the signal quality of electric field component.In certain embodiments, signal quality detector module comprises signal strength detection module, and/or signal quality detector module comprises data resolution module and error rate calculation module, wherein, signal strength detection module is for detecting respectively the magnetic-field component of electromagnetic signal and the signal intensity of electric field component; Data resolution module is used for parsing data from magnetic-field component and electric field component respectively, the bit error rate of the data that error rate calculation module parses for computational data parsing module.As shown in Figure 6, signal quality detector module comprises two signal strength detection modules, these two signal strength detection modules are connected with the automatic gain control module in the first branch road and the second branch road respectively, and the intensity of the signal to the output of automatic gain control module detects.In other embodiments, signal strength detection module can be directly and signal receiving module 11, or other ingredients in the first branch road, the second branch road connect.The output of signal quality detector module can be simulating signal or digital signal.
In further embodiments, near field electromagnetic positioning device 1 also comprises: judge module and logging modle, judge module is connected with signal quality detector module, and for judging whether the magnetic-field component of described electromagnetic signal and the signal quality of electric field component meet preset requirement; Logging modle is in the time that the magnetic-field component of described electromagnetic signal and the signal quality of electric field component all meet preset requirement, record the channel information of described electromagnetic signal, the magnetic-field component of described electromagnetic signal and the signal quality of electric field component all meet preset requirement, the transmission-channel interference that this electromagnetic signal is described is little, can use.
In further embodiments, near field electromagnetic positioning device 1 also comprises: configuration module and/or sending module; Configuration module receives and/or transmitting channel for the electromagnetic signal of utilizing the channel information of logging modle record to configure described near field electromagnetic positioning device 1, and follow-up near field electromagnetic positioning device 1 can utilize these channels to send and/or receiving electromagnetic signals; Sending module is for transferring to external device (ED) by the channel information of logging modle record by wired or wireless mode, receive and/or transmitting channel for the electromagnetic signal that configures described external device (ED), subsequent external device can utilize these channels to send and/or receiving electromagnetic signals.
In certain embodiments, judge module, logging modle and/or configuration module can be integrated in same microprocessor, as Fig. 7, in Fig. 7 microprocessor with illustrate signal receiving module 11 and not being connected of signal processing module 12.In further embodiments, signal quality detector module also can be integrated in microprocessor.Microprocessor can also be managed logic control, the data input and output of whole near field electromagnetic positioning device, configuration of frequency parameter etc.
In certain embodiments, comprise comparison module and distance detector apart from detection module 13, comparison module is for comparing through signal processing module 12 magnetic-field component after treatment and electric field component and exporting difference characteristic; Distance detector is for receiving described difference characteristic and utilizing described difference characteristic information to determine the distance between described electromagnetic signal transmit leg.The output signal that this embodiment is applicable to signal processing module 12 is the scene of simulating signal.The difference characteristic of comparison module output can be proportional with phase differential or have analog voltage or the digital signal of correlativity.Certainly can also comprise the difference characteristic that other are auxiliary, such as amplitude difference etc.Distance detector can be converted to distance by the difference characteristic of comparison module output, and distance detector can output audio, video, light signal etc. are used to indicate to user.Above-mentioned sending module can also be used for, by wired or wireless mode, range information is transferred to the more equipment of far-end.As shown in Figure 8, comparison module is phase comparator, accesses respectively the signal of the first branch road and the output of the second branch road, compares, and exports comparative result to distance detector.
In further embodiments, above-mentioned the first branch road and the second branch road also comprise respectively analog-to-digital conversion module, and analog-to-digital conversion module for exporting to apart from detection module 13 on the branch road of place after default component signal after treatment converts digital signal to; And comprise digital signal processor (DigitalSignalProcessor, DSP) apart from detection module 13, determine the distance between described electromagnetic signal transmit leg for the digital signal of exporting respectively according to described the first branch road and the second branch road.As shown in Figure 9, be an embodiment, comparing Fig. 3 difference is, on the first branch road and the second branch road, increase respectively analog-to-digital conversion module, the first branch road comprises the first filtration module successively, the first amplification module, automatic gain control module, the first calibration module and the first analog-to-digital conversion module, the first filtration module on this branch road is for carrying out exporting the first amplification module on this branch road to after filtering to the magnetic-field component of signal receiving module output, the first amplification module on this branch road exports the automatic gain control module on this branch road to for after this filtered signal is amplified, automatic gain control module on this branch road is for carrying out exporting the first calibration module to after automatic gain control to the signal after amplifying, the first calibration module exports the first analog-to-digital conversion module to after the signal of this automatic gain control module output is calibrated, the first analog-to-digital conversion module exports to apart from detection module 13 after converting the signal after calibration to digital signal.The second branch road comprises the first filtration module, the first amplification module, automatic gain control module, the second calibration module and the second analog-to-digital conversion module successively, the first filtration module on this branch road is for carrying out exporting the first amplification module on this branch road to after filtering to the electric field component signal of signal receiving module output, and the first amplification module on this branch road exports the automatic gain control module on this branch road to for after this filtered signal is amplified; Automatic gain control module on this branch road is for carrying out exporting the second calibration module to after automatic gain control to the signal after amplifying; The second calibration module exports the second analog-to-digital conversion module to after the signal of this automatic gain control module output is calibrated; The second analog-to-digital conversion module exports to apart from detection module 13 after converting the signal after calibration to digital signal.In another embodiment, automatic gain control module can be saved, as shown in figure 10.
Analog-to-digital conversion module can be analog to digital converter (ADC).Digital signal processor is mainly used in the two ways of digital signals of input to carry out digital filtering, and phase bit comparison, exports corresponding range information according to phase differential.
The magnetic-field component of the electromagnetic signal that the utility model utilization receives and electric field component are determined the distance between this electromagnetic signal transmit leg, realize location, and penetration power and jamproof performance are stronger.Especially under non line of sight condition, can penetrate restraining mass finds range.In order to improve distance accuracy, the near field electromagnetic positioning device that the utility model provides is also calibrated the magnetic-field component for finding range and/or electric field component, utilizes the signal after calibration to find range, the error of introducing in erasure signal reception, processing procedure.The utility model also provides multiple different circuit structure, meets various application occasions, and wherein the use expansion of digital signal processor is stronger.
Above content is in conjunction with concrete embodiment further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (11)
1. a near field electromagnetic positioning device, is characterized in that, comprises successively the signal receiving module that connects, signal processing module and apart from detection module; Signal receiving module is used for the magnetic-field component and the electric field component that receive external electromagnetic signal and export described electromagnetic signal; Signal processing module is for receiving described magnetic-field component and the electric field component of signal receiving module output, described magnetic-field component and electric field component are preset after processing and exported to respectively apart from detection module, and described default processing comprises calibrates described magnetic-field component and/or electric field component; Apart from detection module for according to signal processing module to described magnetic-field component and electric field component preset output signal after treatment definite with described electromagnetic signal transmit leg between distance.
2. near field electromagnetic positioning device as claimed in claim 1, is characterized in that, described signal receiving module comprises the first antenna and the second antenna; The first antenna is used for receiving external electromagnetic signal, exports signal processing module in response to the magnetic-field component of described electromagnetic signal and by described magnetic-field component; The second antenna is used for receiving external electromagnetic signal, exports signal processing module in response to the electric field component of described electromagnetic signal and by described electric field component;
Or described signal receiving module comprises third antenna and signal separation module, third antenna is used for receiving external electromagnetic signal and exports signal separation module to; Signal separation module is used for isolating magnetic-field component and electric field component from described electromagnetic signal, and exports signal processing module to.
3. near field electromagnetic positioning device as claimed in claim 1, it is characterized in that, signal processing module exports the first branch road apart from detection module to after comprising the magnetic-field component for receiving signal receiving module output and presetting processing, and exports the second branch road apart from detection module to after receiving the electric field component of signal receiving module output and presetting processing; Described the first branch road and/or the second branch road comprise calibration module, for component signal corresponding on the branch road of place is calibrated.
4. near field electromagnetic positioning device as claimed in claim 3, is characterized in that, the first branch road, the second branch road also comprise respectively: the first filtration module, the first amplification module and automatic gain control module; The first filtration module is for carrying out filtering to component signal corresponding on the branch road of place; The first amplification module is used for amplifying through the filtered signal of the first filtration module on the branch road of place; Automatic gain control module is for carrying out automatic gain control to the signal after the first amplification module amplifies on the branch road of place; Calibration module exports to apart from detection module after the signal of automatic gain control module output on the branch road of place is calibrated.
5. near field electromagnetic positioning device as claimed in claim 4, it is characterized in that, the first branch road, the second branch road also comprise respectively: be connected to frequency mixing module, the second filtration module, the second amplification module and the 3rd filtration module between the first amplification module and automatic gain control module in turn; Frequency mixing module is used for the signal after the first amplification module amplifies and default reference frequency signal on the branch road of place to carry out mixing, and exports mixed frequency signal to the second filtration module; The second filtration module is for carrying out filtering to the mixed frequency signal of place branch road uppermixing module output; The second amplification module is used for amplifying through the filtered signal of the second filtration module on the branch road of place; The 3rd filtration module is used for the signal after the second amplification module amplifies on the branch road of place to carry out filtering, then exports automatic gain control module to.
6. near field electromagnetic positioning device as claimed in claim 5, is characterized in that, the mixed frequency signal of frequency mixing module output is intermediate-freuqncy signal.
7. near field electromagnetic positioning device as claimed in claim 5, is characterized in that, described near field electromagnetic positioning device also comprises: oscillator, and for the frequency mixing module output reference frequency signal to the first branch road and the second branch road respectively.
8. near field electromagnetic positioning device as claimed in claim 1, it is characterized in that, described near field electromagnetic positioning device also comprises: the signal quality detector module being connected with signal receiving module or signal processing module, and for detecting respectively the magnetic-field component of described electromagnetic signal and the signal quality of electric field component.
9. near field electromagnetic positioning device as claimed in claim 8, it is characterized in that, described near field electromagnetic positioning device also comprises judge module and logging modle, judge module is connected with signal quality detector module, and for judging whether the magnetic-field component of described electromagnetic signal and the signal quality of electric field component meet preset requirement; Logging modle, in the time that the magnetic-field component of described electromagnetic signal and the signal quality of electric field component all meet preset requirement, records the channel information of described electromagnetic signal.
10. near field electromagnetic positioning device as claimed in claim 9, is characterized in that, described near field electromagnetic positioning device also comprises configuration module and/or sending module; Configuration module receives and/or transmitting channel for the electromagnetic signal of utilizing the channel information of logging modle record to configure described near field electromagnetic positioning device; Sending module, for the channel information of logging modle record is transferred to external device (ED), receives and/or transmitting channel for the electromagnetic signal that configures described external device (ED).
11. near field electromagnetic positioning devices as described in claim 3 to 7 any one, it is characterized in that, comprise comparison module and distance detector apart from detection module, comparison module is for comparing through signal processing module magnetic-field component after treatment and electric field component and exporting difference characteristic; Distance detector is for receiving described difference characteristic and utilizing described difference characteristic information to determine the distance between described electromagnetic signal transmit leg;
And/or described the first branch road and the second branch road also comprise respectively analog-to-digital conversion module, analog-to-digital conversion module for exporting to apart from detection module on the branch road of place after default component signal after treatment converts digital signal to; And comprise digital signal processor apart from detection module, determine the distance between described electromagnetic signal transmit leg for the digital signal of exporting respectively according to described the first branch road and the second branch road.
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| CN201320773118.9U CN203825190U (en) | 2013-11-28 | 2013-11-28 | Near-field electromagnetic ranging device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914427A (en) * | 2015-06-15 | 2015-09-16 | 北京科技大学 | Adaptive time delay estimation ranging method and system based on received signal strength |
| CN104914426A (en) * | 2015-06-15 | 2015-09-16 | 北京科技大学 | Near field ranging system and method based on adaptive time delay estimation |
| CN106199567A (en) * | 2016-07-07 | 2016-12-07 | 北京科技大学 | A kind of near field electromagnetic field range-measurement system |
| CN113804093A (en) * | 2020-06-11 | 2021-12-17 | 阿森松技术公司 | Electromagnetic position measurement system with sensor parasitic loop compensation |
-
2013
- 2013-11-28 CN CN201320773118.9U patent/CN203825190U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104914427A (en) * | 2015-06-15 | 2015-09-16 | 北京科技大学 | Adaptive time delay estimation ranging method and system based on received signal strength |
| CN104914426A (en) * | 2015-06-15 | 2015-09-16 | 北京科技大学 | Near field ranging system and method based on adaptive time delay estimation |
| CN106199567A (en) * | 2016-07-07 | 2016-12-07 | 北京科技大学 | A kind of near field electromagnetic field range-measurement system |
| CN106199567B (en) * | 2016-07-07 | 2018-09-14 | 北京科技大学 | A kind of near field electromagnetic field range-measurement system |
| CN113804093A (en) * | 2020-06-11 | 2021-12-17 | 阿森松技术公司 | Electromagnetic position measurement system with sensor parasitic loop compensation |
| US11883115B2 (en) | 2020-06-11 | 2024-01-30 | Northern Digital, Inc. | Electromagnetic position measurement system with sensor parasitic loop compensation |
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