CN112087279B - Signal shielding system for prison - Google Patents
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- CN112087279B CN112087279B CN202010993223.8A CN202010993223A CN112087279B CN 112087279 B CN112087279 B CN 112087279B CN 202010993223 A CN202010993223 A CN 202010993223A CN 112087279 B CN112087279 B CN 112087279B
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- 238000000034 method Methods 0.000 claims abstract description 28
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- 238000012546 transfer Methods 0.000 claims description 29
- 239000013307 optical fiber Substances 0.000 claims description 15
- 230000001276 controlling effect Effects 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 10
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- 230000000873 masking effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 23
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- 230000035945 sensitivity Effects 0.000 description 10
- 238000012544 monitoring process Methods 0.000 description 9
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/42—Jamming having variable characteristics characterized by the control of the jamming frequency or wavelength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/68—Jamming involving special techniques using passive jamming, e.g. by shielding or reflection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
- H04N23/675—Focus control based on electronic image sensor signals comprising setting of focusing regions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention provides a signal shielding system for prisons, which comprises a sampling device, a steering device, a wavelength control device, a focusing device and a processor, wherein the sampling device is configured to sample a shielded space; the steering device is configured to rotate the direction of the wavelength control device and the focusing device; the wavelength control device is configured to control the wavelength of the shielding signal; the focusing means are each configured to define a range of the shielding signal. In the invention, the configuration file is transmitted towards the control board in the optimization process of the wavelength control device, and the control board controls the length of the wavelength according to the parameters of the configuration file, so that the accurate control of the wavelength is realized; meanwhile, the diffraction angle of the shielding wave is controlled by changing the magnetic circuit period of the pseudo-blazed magnetic circuit, which is provided by adjusting voltages applied to various electromagnetic pixels, thereby realizing a control function of the wavelength.
Description
Technical Field
The invention relates to the technical field of prison communication, in particular to a signal shielding system for prisons.
Background
The monitoring camera is used as the main force of front-end products in the security monitoring field, and has wide application in the security monitoring field. Especially, the information industry is greatly developed and the society is increasingly paying attention to security and protection at present, the requirements of the market on the image effect of the monitoring camera are increasingly improved, and the high definition and low noise point gradually become industry development trend.
As in the prior art CN103648259a, a radiation-proof shield for a surveillance camera is disclosed, where a plurality of circuit boards are often combined for use, and a large amount of electromagnetic radiation exists between the circuit boards, and if the design is unreasonable or limited by the area of the structural board, the image signal is easily interfered by the electromagnetic radiation. It follows that the electromagnetic environment inside the camera is very complex, the radiation sources are various, and the image signals are easily disturbed. Another typical shield can and PCB board disclosed in the prior art as WO2014187403A1, the shield can comprises a can body and a partition wall, the can body is used for shielding the whole PCB area to be shielded, so as to avoid interference to external equipment, and the partition wall is used for separating different devices in the PCB area, so as to avoid mutual interference between the devices. In addition, as disclosed in the prior art of WO2014187403A1, although the shielding case is made of rigid material and has good heat conducting performance, the shielding cases on the existing PCB are all single-layer shielding cases, and the heat dissipation effect is limited.
The invention is designed for solving the problems that the interference is arranged on the periphery of a prison, the influence of closed circuit monitoring is large, the detection and control effect and the shielding effect are poor and the like in the prior art.
Disclosure of Invention
The invention aims at providing a signal shielding system for prisons, which aims at overcoming the defects of the prior signal shielding of the prisons.
In order to overcome the defects in the prior art, the invention adopts the following technical scheme:
a signal shielding system for prisons, the signal shielding system comprising a sampling device, a steering device, a wavelength control device, a focusing device, and a processor, the sampling device configured to sample a shielded space; the steering device is configured to rotate the direction of the wavelength control device and the focusing device; the wavelength control device is configured to control the wavelength of the shielding signal; the focusing means are each configured to define a range of the shielding signal.
Optionally, the sampling device includes a sampling unit and a rotating mechanism, the sampling unit is configured to sample a start position and an end position of the shielding signal; the rotating mechanism is configured to switch the position of the sampling unit; the rotating mechanism comprises a rotating seat, a rotating rod and a first driving mechanism, one end of the rotating rod is vertically and fixedly connected with the rotating seat, the other end of the rotating rod vertically extends out towards one side far away from the rotating seat, and the first driving mechanism is configured to be in driving connection with the rotating seat.
Optionally, the steering device includes a positioner, a sensing mechanism and a steering unit, the sensing mechanism is configured to steer a steering position of the positioner, the positioner and the steering unit are configured to be disposed on the steering unit, the steering unit includes an offset seat, a transfer cavity and a regulating member, the transfer cavity is disposed on the offset seat, two sides of the positioner are connected with the regulating member to form a rotating part, the rotating part is configured to be in driving connection with the transfer cavity, the transfer member includes a transfer rod and a second driving mechanism, and the transfer rod is configured to be in driving connection with the second driving mechanism.
Optionally, the wavelength control device is configured to create an optimized phase profile for wavelength selective switching and transmit the optimized phase profile information to the control board; the wavelength control device is configured to perform a nonlinear constraint optimization process to create diffraction efficiency criteria, optimize phase distribution, based on the selected port criteria.
Optionally, the focusing device includes stretching out the seat, focusing unit and stretching out the pole, stretch out the pole with it is connected to focus the unit, stretch out the pole with stretch out between the pole and be connected through the offset unit, focus the unit and include signal induction magnetic circuit, magnetic circuit calibration component, signal induction magnetic circuit is constructed to align to sampling position of sampling device, magnetic circuit calibration component is constructed to correct the position or the angle of magnetic circuit.
Optionally, the sampling unit comprises an array of optical fibers for directing the formed shield and a control board configured for providing the selected pixel electrode voltage levels in relation to the hologram in the form of a phase diagram configured to provide switching of defined wavelengths of the input optical signal between the input port and the input port.
Optionally, adjusting the phase of the optimized phase profile includes phase scaling, pixel count and order subtraction until crosstalk at all unselected output ports is less than a predetermined threshold level.
The beneficial effects obtained by the invention are as follows:
1. after limiting the position of the focusing unit through the offset device, the focusing device can focus rapidly to ensure the limitation of the range of the formed shielding signal, and prevent the damage to surrounding equipment caused by overlarge area;
2. the configuration file is transmitted to the control board in the optimization process of the wavelength control device, and the control board controls the length of the wavelength according to the parameters of the configuration file, so that the accurate control of the wavelength is realized;
3. controlling a diffraction angle of the shielding wave by changing a magnetic circuit period of a pseudo-blazed magnetic circuit provided by adjusting voltages applied to various electromagnetic pixels so as to realize a control function of the wavelength;
4. The positioning device is also matched with the wavelength control device and the focusing device, so that the focusing operation can be quickly performed between the wavelength control device and the focusing device, meanwhile, the shielding effect of the whole device can be quickly formed into a shielding cover, and the equipment in the shielding cover cannot be interfered by external electromagnetic interference based on the shielding cover, so that monitoring equipment and circuits in prisons cannot be interfered by external magnetic fields;
5. after the magnetic circuit of the optical fiber is set by an operator, the optical fiber array outputs according to the voltage level corresponding to the selected pixel, so that the sampling effect of the sampling device is realized.
Drawings
The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
Fig. 1 is a schematic control flow chart of the present invention.
Fig. 2 is a schematic control flow diagram of the wavelength control device.
Fig. 3 is a schematic diagram of a control flow of the sampling unit.
Fig. 4 is a schematic front view of the focusing unit.
Fig. 5 is a schematic right-view structure of the focusing unit.
Reference numerals illustrate: 1-a sliding seat; 2-extending the seat; a 3-focusing unit; 4-sliding tracks; 5-a slide drive mechanism; a 6-offset unit; 7-extending the rod.
Detailed Description
The technical scheme and advantages of the present invention will become more apparent, and the present invention will be further described in detail with reference to the following examples thereof; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. Other systems, methods, and/or features of the present embodiments will be or become apparent to one with skill in the art upon examination of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the following detailed description.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc., based on the orientation or positional relationship shown in the drawings, this is for convenience of description and simplification of the description, rather than to indicate or imply that the apparatus or components referred to must have a specific orientation.
Embodiment one: a signal shielding system for prisons, the signal shielding system comprising a sampling device, a steering device, a wavelength control device, a focusing device, and a processor, the sampling device configured to sample a shielded space; the steering device is configured to rotate the direction of the wavelength control device and the focusing device; the wavelength control device is configured to control the wavelength of the shielding signal; the focusing device is respectively configured to limit the range of the shielding signal; the sampling device comprises a sampling unit and a rotating mechanism, wherein the sampling unit is configured to sample a starting position and an ending position of the shielding signal; the rotating mechanism is configured to switch the position of the sampling unit; the rotating mechanism comprises a rotating seat, a rotating rod and a first driving mechanism, one end of the rotating rod is vertically and fixedly connected with the rotating seat, the other end of the rotating rod vertically extends towards one side far away from the rotating seat, and the first driving mechanism is configured to be in driving connection with the rotating seat; the steering device comprises a positioner, a sensing mechanism and a steering unit, wherein the sensing mechanism is configured to steer the steering position of the positioner, the positioner and the steering unit are configured to be arranged on the steering unit, the steering unit comprises an offset seat, a transfer cavity and a regulating and controlling member, the transfer cavity is arranged on the offset seat, two sides of the positioner are connected with the regulating and controlling member to form a rotating part, the rotating part is configured to be in driving connection with the transfer cavity, the transfer member comprises a transfer rod and a second driving mechanism, and the transfer rod is configured to be in driving connection with the second driving mechanism; the wavelength control device is configured to create an optimized phase profile for wavelength selective switching and transmit the optimized phase profile information to the control board; the wavelength control device is configured to perform a nonlinear constraint optimization process to create diffraction efficiency criteria, optimize phase distribution, based on the selected port criteria; the focusing device comprises an extension seat 2, a focusing unit 3 and an extension rod 7, wherein the extension rod 7 is connected with the focusing unit 3, the extension rod 7 is connected with the extension seat 2 through the offset unit 6, the focusing unit 3 comprises a signal induction magnetic circuit and a magnetic circuit calibration member, the signal induction magnetic circuit is configured to align the sampling position of the sampling device, and the magnetic circuit calibration member is configured to correct the position or angle of the magnetic circuit; the sampling unit includes an array of optical fibers for directing the formed shield, and a control board configured to provide selected pixel electrode voltage levels associated with the hologram in the form of a phase diagram configured to provide switching of defined wavelengths of the input optical signal between the input port and the input port; adjusting the phase of the optimized phase profile including phase scaling, pixel count and order subtraction until crosstalk at all unselected output ports is less than a predetermined threshold level;
Embodiment two: this embodiment should be understood to include at least all of the features of any one of the foregoing embodiments, and further improvements thereto, and in particular, to provide a signal shielding system for prisons, the signal shielding system including a sampling device, a steering device, a wavelength control device, a focusing device, and a processor, the sampling device configured to sample a shielded space; the steering device is configured to rotate the direction of the wavelength control device and the focusing device; the wavelength control device is configured to control the wavelength of the shielding signal; the focusing device is respectively configured to limit the range of the shielding signal; specifically, the sampling device and the steering device are matched for use, so that signals in prisons are shielded from external signals in the process of transmitting the signals, and meanwhile, a shielding cover formed under the control operation of the wavelength control device is protected; in addition, the processor is respectively connected with the sampling device, the steering device, the wavelength control device and the focusing device in a control way, and the devices are mutually matched for use, so that the whole shielding process is realized efficiently and reliably;
The sampling device comprises a sampling unit and a rotating mechanism, wherein the sampling unit is configured to sample a starting position and an ending position of the shielding signal; the rotating mechanism is configured to switch the position of the sampling unit; the rotating mechanism comprises a rotating seat, a rotating rod and a first driving mechanism, one end of the rotating rod is vertically and fixedly connected with the rotating seat, the other end of the rotating rod vertically extends towards one side far away from the rotating seat, and the first driving mechanism is configured to be in driving connection with the rotating seat; specifically, the sampling device is used for sampling the positions of the initial point and the final point of the formed shielding cover, so that the alignment or control operation of the wavelength control device and the focusing device can play a protective role; in this embodiment, the sampling unit performs conversion of the sampling position of the sampling unit under the rotation operation of the rotation mechanism; in this embodiment, the rotation unit further includes an angle sensor configured to detect a rotation angle of the rotation lever, the angle sensor is configured to be disposed on the rotation lever and rotate following the rotation of the rotation lever, the angle sensor senses the rotation angle and connects the collected angle value with the processor, and compares the collected angle value with a set angle value under the control operation of the processor, and if the detected angle value is inconsistent with the set angle value, the processor controls the first driving mechanism to drive the position of the rotation seat; in this embodiment, after the position of the angle sensor is determined, the processor controls to initialize the angle sensor, where the initialization includes clearing a detection value of the angle sensor and detecting a rotation angle of the rotation lever again;
The steering device comprises a positioner, a sensing mechanism and a steering unit, wherein the sensing mechanism is configured to steer the steering position of the positioner, the positioner and the steering unit are configured to be arranged on the steering unit, the steering unit comprises an offset seat, a transfer cavity and a regulating and controlling member, the transfer cavity is arranged on the offset seat, two sides of the positioner are connected with the regulating and controlling member to form a rotating part, the rotating part is configured to be in driving connection with the transfer cavity, the transfer member comprises a transfer rod and a second driving mechanism, and the transfer rod is configured to be in driving connection with the second driving mechanism; specifically, the locator can accurately perform the locating operation of the locator under the rotation operation of the sensing mechanism and the steering unit; in this embodiment, the sensing mechanism is disposed on the positioner, and when the steering unit rotates, the sensing mechanism can perform a quick positioning operation on the positioner; in this embodiment, the sensing mechanism is used in cooperation with the steering unit, so that the positioning operation of the positioner can be performed efficiently; the position of the positioner is rotated through the steering unit, so that the positioner can guide the directions of the wavelength control device and the focusing device in the rotating process; in this embodiment, the positioning device is further used in cooperation with the wavelength control device and the focusing device, so that focusing operation can be performed between the wavelength control device and the focusing device quickly, and meanwhile, a shielding cover can be formed quickly by the shielding effect of the whole device, and equipment in the shielding cover cannot be interfered by external electromagnetic interference based on the shielding cover, so that monitoring equipment and circuits in a prison cannot be interfered by external magnetic fields;
The wavelength control device is configured to create an optimized phase profile for wavelength selective switching and transmit the optimized phase profile information to the control board; the wavelength control device is configured to perform a nonlinear constraint optimization process to create diffraction efficiency criteria, optimize phase distribution, based on the selected port criteria; specifically, adjusting the phase of the optimized phase profile includes phase scaling, pixel count, and order subtraction until crosstalk at all unselected output ports is less than a predetermined threshold level; specifically, the wavelength control device is used for triggering the shielding signal and controlling the wavelength of the shielding signal at the same time; the need for phase reset and the use of pixelated arrays may create unacceptable levels of crosstalk and likewise increase insertion loss at selected output ports; performing phase scaling, pixel number adjustment and/or order subtraction to further reduce unnecessary crosstalk; the wavelength control device optimizes according to the configuration file in the process of controlling the wavelength, and transmits the configuration file to the control board in the process of optimizing the wavelength control device, wherein the control board controls the length of the wavelength according to the parameters of the configuration file; in this embodiment, the initial hologram is initially adjusted for phase scaling, such as: changing the phase reset to a value less than 2pi; the peak crosstalk is then measured and if the level of crosstalk is still too high, the process loops back to measuring the power level between the input port and the selected output port and adjusting the position of the control board until the coupling efficiency is maximized and a different phase reset value is attempted; if the phase scaling is not successful in reducing the crosstalk to a sufficient level, then the pixel count needs to be slightly adjusted to reduce the effect of the electromagnetic fringe field; in particular, these two parameters should cooperate with each other as the best solution for manual calibration; in this embodiment, the wavelength control device uses an electromagnetic generating element-based to provide wavelength switching, wherein an electrical signal applied to the electromagnetic structure provides a desired beam steering between an input port and a plurality of output ports; the working principle of the electromagnetic beam steering device is that different voltages are loaded on different single pixels of the electromagnetic beam; that is, each pixel is individually addressable and controllable; the electromagnetic pixel array may be configured to have characteristics of a blazed magnetic circuit because of the birefringent effect of the electromagnetic material, different voltages corresponding to different phase delays; therefore, the diffraction angle of the shield wave can be controlled only by changing the magnetic circuit period of the pseudo-blazed magnetic circuit provided by adjusting the voltages applied to the various electromagnetic pixels; this adjustment of the voltage allows diffracted light to be output at different ports of the control board, thereby realizing a control function of the wavelength;
The focusing device comprises an extension seat 2, a focusing unit 3 and an extension rod 7, wherein the extension rod 7 is connected with the focusing unit 3, the extension rod 7 is connected with the extension seat 2 through the offset unit 6, the focusing unit 3 comprises a signal induction magnetic circuit and a magnetic circuit calibration member, the signal induction magnetic circuit is configured to align the sampling position of the sampling device, and the magnetic circuit calibration member is configured to correct the position or angle of the magnetic circuit; specifically, the focusing unit 3 is configured to control a magnetic circuit of a shielding signal, and define a position of the magnetic circuit of the wavelength control device based on the control effect; in this embodiment, the extending seat 2 is provided with a U-shaped groove, the bottom of the extending seat 2 is provided with an action hole, and the extending rod 7 moves in the action hole; in this embodiment, one end of the extension rod 7 is connected to the focusing unit 3, the other end of the extension rod 7 is connected to a shifter unit, the shifter unit 6 includes a slide rail 4, a slide base 1, a slide driving mechanism 5, and position detecting pieces configured to be equally spaced apart along the length direction of the slide rail 4, and the position detecting pieces are connected to the processor and detect the position of the slide base 1 based on the respective position detecting pieces; in the present embodiment, the slide driving mechanism 5 is configured to be in driving connection with the slide mount 1, and the slide mount 1 is configured to be in sliding connection with the slide rail 4; in this embodiment, the signal-sensing magnet is triggered by the magnetic circuit calibration member and triggers the position of the calibration member; the magnetic circuit calibration means comprises an amplifier, a calibration circuit, a magnetic field sensor and a reading circuit, determining the value of an output signal related to a controlled magnetic field having a known value; and calculating an effective value of the detection sensitivity of the magnetic field sensor from the determined value; and generating a plurality of control signals based on the effective value of the detection sensitivity; the calibration circuit is operable to generate an excitation current to excite a magnetized element of the magnetic field sensor, and the amplifier is operable to electrically couple to a first magneto-resistive element of the magnetic field sensor; the calibration circuit is operative to: measuring at least a first value of the output signal in the presence of an external magnetic field and in the absence of a controlled magnetic field; and measuring at least a second value of the output signal in the presence of both the external magnetic field and the controlled magnetic field; determining an effective value of the detection sensitivity based on the first and second measurements; and generating a plurality of control signals based on the effective value of the detection sensitivity; the calibration circuit is operable to determine a difference between the first measurement and the second measurement of the output signal; the magnetic field sensor is an anisotropic magneto-resistive magnetic sensor, the amplifier is configured to be electrically coupled to a bridge detection structure formed by a plurality of magneto-resistive elements of the magnetic field sensor, and the magnetic detection signal is an unbalanced signal of the bridge detection structure; the magnetic field sensor is configured to generate a magnetic field detection signal from a plurality of magnetic fields; further, in this embodiment, a read circuit includes an amplifier configured to have at least one input coupled to a magnetic field sensor and at least one output, and to generate an output signal at the at least one output from a magnetic field detection signal, a calibration circuit; the calibration circuit is configured to generate a plurality of control signals to control a feedback loop of the amplifier based on an indication of a detection sensitivity of the magnetic field sensor;
The sampling unit includes an array of optical fibers for directing the formed shield, and a control board configured to provide selected pixel electrode voltage levels associated with the hologram in the form of a phase diagram configured to provide switching of defined wavelengths of the input optical signal between the input port and the input port; specifically, in this embodiment, the optical fiber array and the control board cooperate with each other so that the indication position of the sampling unit can be identified by the focusing device and the wavelength control device, and in this embodiment, the control board is configured to control the triggering time of the optical fiber array; meanwhile, the control panel is configured to perform output operation according to the voltage level corresponding to the selected pixel after the magnetic circuit of the optical fiber is set by an operator, so as to realize the sampling effect of the sampling device;
embodiment III: this embodiment should be understood to include at least all of the features of any one of the foregoing embodiments, and further improvements thereto, and in particular, to provide a signal shielding system for prisons, the signal shielding system including a sampling device, a steering device, a wavelength control device, a focusing device, and a processor, the sampling device configured to sample a shielded space; the steering device is configured to rotate the direction of the wavelength control device and the focusing device; the wavelength control device is configured to control the wavelength of the shielding signal; the focusing device is respectively configured to limit the range of the shielding signal; specifically, the sampling device and the steering device are matched for use, so that signals in prisons are shielded from external signals in the process of transmitting the signals, and meanwhile, a shielding cover formed under the control operation of the wavelength control device is protected; in addition, the processor is respectively connected with the sampling device, the steering device, the wavelength control device and the focusing device in a control way, and the devices are mutually matched for use, so that the whole shielding process is realized efficiently and reliably;
The sampling device comprises a sampling unit and a rotating mechanism, wherein the sampling unit is configured to sample a starting position and an ending position of the shielding signal; the rotating mechanism is configured to switch the position of the sampling unit; the rotating mechanism comprises a rotating seat, a rotating rod and a first driving mechanism, one end of the rotating rod is vertically and fixedly connected with the rotating seat, the other end of the rotating rod vertically extends towards one side far away from the rotating seat, and the first driving mechanism is configured to be in driving connection with the rotating seat; specifically, the sampling device is used for sampling the positions of the initial point and the final point of the formed shielding cover, so that the alignment or control operation of the wavelength control device and the focusing device can play a protective role; in this embodiment, the sampling unit performs conversion of the sampling position of the sampling unit under the rotation operation of the rotation mechanism; in this embodiment, the rotation unit further includes an angle sensor configured to detect a rotation angle of the rotation lever, the angle sensor is configured to be disposed on the rotation lever and rotate following the rotation of the rotation lever, the angle sensor senses the rotation angle and connects the collected angle value with the processor, and compares the collected angle value with a set angle value under the control operation of the processor, and if the detected angle value is inconsistent with the set angle value, the processor controls the first driving mechanism to drive the position of the rotation seat; in this embodiment, after the position of the angle sensor is determined, the processor controls to initialize the angle sensor, where the initialization includes clearing a detection value of the angle sensor and detecting a rotation angle of the rotation lever again;
The steering device comprises a positioner, a sensing mechanism and a steering unit, wherein the sensing mechanism is configured to steer the steering position of the positioner, the positioner and the steering unit are configured to be arranged on the steering unit, the steering unit comprises an offset seat, a transfer cavity and a regulating and controlling member, the transfer cavity is arranged on the offset seat, two sides of the positioner are connected with the regulating and controlling member to form a rotating part, the rotating part is configured to be in driving connection with the transfer cavity, the transfer member comprises a transfer rod and a second driving mechanism, and the transfer rod is configured to be in driving connection with the second driving mechanism; specifically, the locator can accurately perform the locating operation of the locator under the rotation operation of the sensing mechanism and the steering unit; in this embodiment, the sensing mechanism is disposed on the positioner, and when the steering unit rotates, the sensing mechanism can perform a quick positioning operation on the positioner; in this embodiment, the sensing mechanism is used in cooperation with the steering unit, so that the positioning operation of the positioner can be performed efficiently; the position of the positioner is rotated through the steering unit, so that the positioner can guide the directions of the wavelength control device and the focusing device in the rotating process; in this embodiment, the positioning device is further used in cooperation with the wavelength control device and the focusing device, so that focusing operation can be performed between the wavelength control device and the focusing device quickly, and meanwhile, a shielding cover can be formed quickly by the shielding effect of the whole device, and equipment in the shielding cover cannot be interfered by external electromagnetic interference based on the shielding cover, so that monitoring equipment and circuits in a prison cannot be interfered by external magnetic fields;
The wavelength control device is configured to create an optimized phase profile for wavelength selective switching and transmit the optimized phase profile information to the control board; the wavelength control device is configured to perform a nonlinear constraint optimization process to create diffraction efficiency criteria, optimize phase distribution, based on the selected port criteria; specifically, adjusting the phase of the optimized phase profile includes phase scaling, pixel count, and order subtraction until crosstalk at all unselected output ports is less than a predetermined threshold level; in particular, the need for phase reset and the use of pixelated arrays may create unacceptable levels of crosstalk and likewise increase insertion loss at selected output ports; performing phase scaling, pixel number adjustment and/or order subtraction to further reduce unnecessary crosstalk; the wavelength control device optimizes according to the configuration file in the process of controlling the wavelength, and transmits the configuration file to the control board in the process of optimizing the wavelength control device, wherein the control board controls the length of the wavelength according to the parameters of the configuration file; in this embodiment, the initial hologram is initially adjusted for phase scaling, such as: changing the phase reset to a value less than 2pi; the peak crosstalk is then measured and if the level of crosstalk is still too high, the process loops back to measuring the power level between the input port and the selected output port and adjusting the position of the control board until the coupling efficiency is maximized and a different phase reset value is attempted; if the phase scaling is not successful in reducing the crosstalk to a sufficient level, then the pixel count needs to be slightly adjusted to reduce the effect of the electromagnetic fringe field; in particular, these two parameters should cooperate with each other as the best solution for manual calibration; in this embodiment, the wavelength control device uses an electromagnetic generating element-based to provide wavelength switching, wherein an electrical signal applied to the electromagnetic structure provides a desired beam steering between an input port and a plurality of output ports; the working principle of the electromagnetic beam steering device is that different voltages are loaded on different single pixels of the electromagnetic beam; that is, each pixel is individually addressable and controllable; the electromagnetic pixel array may be configured to have characteristics of a blazed magnetic circuit because of the birefringent effect of the electromagnetic material, different voltages corresponding to different phase delays; therefore, the diffraction angle of the shield wave can be controlled only by changing the magnetic circuit period of the pseudo-blazed magnetic circuit provided by adjusting the voltages applied to the various electromagnetic pixels; this adjustment of the voltage allows diffracted light to be output at different ports of the control board, thereby realizing a control function of the wavelength;
The focusing device comprises an extension seat 2, a focusing unit 3 and an extension rod 7, wherein the extension rod 7 is connected with the focusing unit 3, the extension rod 7 is connected with the extension seat 2 through the offset unit 6, the focusing unit 3 comprises a signal induction magnetic circuit and a magnetic circuit calibration member, the signal induction magnetic circuit is configured to align the sampling position of the sampling device, and the magnetic circuit calibration member is configured to correct the position or angle of the magnetic circuit; specifically, the focusing unit 3 is configured to control a magnetic circuit of a shielding signal, and define a position of the magnetic circuit of the wavelength control device based on the control effect; in this embodiment, the extending seat 2 is provided with a U-shaped groove, the bottom of the extending seat 2 is provided with an action hole, and the extending rod 7 moves in the action hole; in this embodiment, one end of the extension rod 7 is connected to the focusing unit 3, the other end of the extension rod 7 is connected to a shifter unit, the shifter unit 6 includes a slide rail 4, a slide base 1, a slide driving mechanism 5, and position detecting pieces configured to be equally spaced apart along the length direction of the slide rail 4, and the position detecting pieces are connected to the processor and detect the position of the slide base 1 based on the respective position detecting pieces; in the present embodiment, the slide driving mechanism 5 is configured to be in driving connection with the slide mount 1, and the slide mount 1 is configured to be in sliding connection with the slide rail 4; in this embodiment, the signal-sensing magnet is triggered by the magnetic circuit calibration member and triggers the position of the calibration member; the magnetic circuit calibration means comprises an amplifier, a calibration circuit, a magnetic field sensor and a reading circuit, determining the value of an output signal related to a controlled magnetic field having a known value; and calculating an effective value of the detection sensitivity of the magnetic field sensor from the determined value; and generating a plurality of control signals based on the effective value of the detection sensitivity; the calibration circuit is operable to generate an excitation current to excite a magnetized element of the magnetic field sensor, and the amplifier is operable to electrically couple to a first magneto-resistive element of the magnetic field sensor; the calibration circuit is operative to: measuring at least a first value of the output signal in the presence of an external magnetic field and in the absence of a controlled magnetic field; and measuring at least a second value of the output signal in the presence of both the external magnetic field and the controlled magnetic field; determining an effective value of the detection sensitivity based on the first and second measurements; and generating a plurality of control signals based on the effective value of the detection sensitivity; the calibration circuit is operable to determine a difference between the first measurement and the second measurement of the output signal; the magnetic field sensor is an anisotropic magneto-resistive magnetic sensor, the amplifier is configured to be electrically coupled to a bridge detection structure formed by a plurality of magneto-resistive elements of the magnetic field sensor, and the magnetic detection signal is an unbalanced signal of the bridge detection structure; the magnetic field sensor is configured to generate a magnetic field detection signal from a plurality of magnetic fields; further, in this embodiment, a read circuit includes an amplifier configured to have at least one input coupled to a magnetic field sensor and at least one output, and to generate an output signal at the at least one output from a magnetic field detection signal, a calibration circuit; the calibration circuit is configured to generate a plurality of control signals to control a feedback loop of the amplifier based on an indication of a detection sensitivity of the magnetic field sensor;
The sampling unit includes an array of optical fibers for directing the formed shield, and a control board configured to provide selected pixel electrode voltage levels associated with the hologram in the form of a phase diagram configured to provide switching of defined wavelengths of the input optical signal between the input port and the input port; specifically, in this embodiment, the optical fiber array and the control board cooperate with each other so that the indication position of the sampling unit can be identified by the focusing device and the wavelength control device, and in this embodiment, the control board is configured to control the triggering time of the optical fiber array; meanwhile, the control panel is configured to perform output operation according to the voltage level corresponding to the selected pixel after the magnetic circuit of the optical fiber is set by an operator, so as to realize the sampling effect of the sampling device;
the signal shielding system further includes an indication transmission device including an indication member configured to indicate a range of the shield, a rotation member configured to shift or move a position of the indication member, an induction member configured to indicate positions of the indication member and the rotation member such that the induction member can form an effect of an optical path on the formed shielding network, and a micro-processing unit; in this embodiment, the indication member is used in combination with the rotating member, so that the indication member can quickly show the area of the shielding case; in addition, the microprocessor is respectively connected with the indicating member, the rotating member and the sensing mechanism in a control way, and performs centralized control operation on each action under the control operation of the microprocessor; the indicating component comprises a plurality of light emitters, each light emitter is close to a sampling part of the sampling device under the control of the processor, and meanwhile, the light path of each light emitter guides the range of the sampling device; the deflection member comprises a deflection seat, a deflection rod and a deflection driving mechanism, the indication member is arranged on the deflection rod, the deflection seat is in driving connection with the deflection driving mechanism, one end of the deflection rod is vertically and fixedly connected with the deflection seat, and the other end of the deflection rod vertically extends towards one side far away from the deflection seat; when the sensing component senses the initial point and the end point of the sampling device, the deflection component rotates the position of the deflection rod under the control operation of the microprocessor, so that the position of the rotation rod can be quickly rotated to a required position; through the cooperation of instruction transmission device with sampling device for the scope of shielding region can show, can instruct the operating personnel to this regional cautiously get into this region.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
In summary, according to the signal shielding system for prison, after the position of the focusing unit is limited by the offset device, the focusing device can focus rapidly, so that the range of a formed shielding signal is limited, and damage to surrounding equipment caused by overlarge area is prevented; transmitting the configuration file to a control board in the optimization process of the wavelength control device, and controlling the length of the wavelength by the control board according to the parameters of the configuration file to realize accurate control of the wavelength; controlling a diffraction angle of the shielding wave by changing a magnetic circuit period of a pseudo-blazed magnetic circuit provided by adjusting voltages applied to various electromagnetic pixels so as to realize a control function of the wavelength; the positioning device is also matched with the wavelength control device and the focusing device, so that the focusing operation can be quickly performed between the wavelength control device and the focusing device, meanwhile, the shielding effect of the whole device can be quickly formed into a shielding cover, and the equipment in the shielding cover cannot be interfered by external electromagnetic interference based on the shielding cover, so that monitoring equipment and circuits in prisons cannot be interfered by external magnetic fields; after the magnetic circuit of the optical fiber is set by an operator, the optical fiber array outputs according to the voltage level corresponding to the selected pixel, so that the sampling effect of the sampling device is realized.
While the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the invention. That is, the methods, systems and devices discussed above are examples. Various configurations may omit, replace, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in a different order than described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of the configurations may be combined in a similar manner. Furthermore, as the technology evolves, elements therein may be updated, i.e., many of the elements are examples, and do not limit the scope of the disclosure or the claims.
Specific details are given in the description to provide a thorough understanding of exemplary configurations involving implementations. However, configurations may be practiced without these specific details, e.g., well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring configurations. This description provides only an example configuration and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configuration will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is intended that it be regarded as illustrative rather than limiting. Various changes and modifications to the present invention may be made by one skilled in the art after reading the teachings herein, and such equivalent changes and modifications are intended to fall within the scope of the invention as defined in the appended claims.
Claims (2)
1. A signal shielding system for prisons, the signal shielding system comprising a sampling device, a steering device, a wavelength control device, a focusing device and a processor, the sampling device being configured to sample a shielded space; the steering device is configured to rotate the direction of the wavelength control device and the focusing device; the wavelength control device is configured to control the wavelength of the shielding signal; the focusing device is configured to limit the range of the shielding signal; the sampling device comprises a sampling unit and a rotating mechanism, wherein the sampling unit is configured to sample a starting position and an ending position of the shielding signal; the rotating mechanism is configured to switch the position of the sampling unit; the rotating mechanism comprises a rotating seat, a rotating rod and a first driving mechanism, one end of the rotating rod is vertically and fixedly connected with the rotating seat, the other end of the rotating rod vertically extends towards one side far away from the rotating seat, and the first driving mechanism is configured to be in driving connection with the rotating seat;
The steering device comprises a positioner, a sensing mechanism and a steering unit, wherein the sensing mechanism is configured to steer the steering position of the positioner, the positioner and the sensing mechanism are configured to be arranged on the steering unit, the sensing mechanism comprises an offset seat, a transfer cavity and a regulating and controlling member, the transfer cavity is arranged on the offset seat, two sides of the positioner are connected with the regulating and controlling member to form a rotating part, the rotating part is configured to be in driving connection with the transfer cavity, and the steering unit comprises a transfer rod and a second driving mechanism, and the transfer rod is configured to be in driving connection with the second driving mechanism;
the wavelength control device is configured to create an optimized phase profile for wavelength selective switching and transmit the optimized phase profile information to the control board; the wavelength control device is configured to perform a nonlinear constraint optimization process to create diffraction efficiency criteria, optimize phase distribution, based on the selected port criteria;
the focusing device comprises an extending seat, a focusing unit and an extending rod, the extending rod is connected with the focusing unit, the extending rod is connected with the extending rod through an offset unit, the focusing unit comprises a signal induction magnetic circuit and a magnetic circuit calibration component, the signal induction magnetic circuit is configured to align the sampling position of the sampling device, and the magnetic circuit calibration component is configured to correct the position or angle of the magnetic circuit;
The sampling unit includes an array of optical fibers for directing the formed mask, and a control board configured to provide selected pixel electrode voltage levels associated with the hologram in the form of a phase diagram configured to provide switching of defined wavelengths of the input optical signal between the input port and the input port.
2. The prison signal masking system of claim 1 wherein adjusting the phase of said optimized phase profile comprises phase scaling, pixel count and order subtraction until the crosstalk of all unselected output ports is less than a predetermined threshold level.
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