CN104414639B - Switch arrays, channel selection device and magnetic resonance imaging system - Google Patents
Switch arrays, channel selection device and magnetic resonance imaging system Download PDFInfo
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Abstract
A kind of switch arrays, channel selection device and magnetic resonance imaging system, the switch arrays include H level switch elements, H >=2；Wherein, first order switch element includes at least two switches sets, h levels switch element includes at least one switches set, 1 ＜ h ＜ H, H levels switch element includes a switches set, each switches set includes at least one switch, and at least one switches set includes at least two switches in the H levels switch element, and the quantity switched in rear stage switch element is less than the quantity switched in previous stage switch element；The switch includes first end and the second end, it is connected positioned at the first end of the switch of same switches set and the common port of switches set where being used as, the second end of the switch in rear stage switch element and the common port of the switches set in previous stage switch element connect one to one.Switch arrays and channel selection device provided by the invention can effectively reduce the insertion loss of passage.
Description
Technical field
The present invention relates to signal transmission technology field, more particularly to a kind of switch arrays, channel selection device and magnetic resonance
Imaging system.
Background technology
Magnetic resonance imaging（MRI, Magnetic Resonance Imaging）The key areas applied as nuclear magnetic resonance,
Because it has fabulous resolving power, imaging parameters to provide abundant diagnostic message to human body soft tissue, human body is not ionized
Many advantages, such as radiation injury, magnetic resonance imaging system is as one of main tool of medical clinic applicationses.
In magnetic resonance imaging system, the radiofrequency signal sent through human body is received by radio-frequency coil.Radiofrequency signal is through radio frequency
Coil channel is transmitted to receiver channel, and the radiofrequency signal that imaging device receives according to receiver is imaged.In order to improve letter
Number signal to noise ratio, the number of radio-frequency coil passage is often more than the number of receiver channel, so an it is generally necessary to passage
Selection device is connected between radio-frequency coil and receiver.
Fig. 1 is a kind of structural representation of existing channel selection device.With reference to figure 1, the channel selection device includes
Input switch unit 11, output switching element 12 and switch matrix unit 13.The switch matrix unit 13 includes M rows, N row are in
The matrix switch of array arrangement, the matrix switch include first end and the second end.It is individual defeated that the input switch unit 11 includes M
Enter switch, the input switch includes first end, the second end and the 3rd end：The corresponding connection one of first end of each input switch
Radio-frequency coil passage, the second end of each input switch correspondingly connect the matrix for being located at same row in the switch matrix unit 13
The first end of switch, the 3rd end of each input switch are connected to ground by resistance R.The output switching element 12 includes N number of
Output switch, the output switch include first end, the second end and the 3rd end：The corresponding connection one of first end of each output switch
Individual receiver channel, the second end of each output switch correspondingly connect the matrix for being located at same row in the switch matrix unit 13
Second end of switch, the 3rd end of each output switch is connected to ground by resistance R.The matrix switch can be single-pole single-throw(SPST
（SPST, single pole single throw）RF switch, the input switch and output switch can be single-pole double throw
（SPDT, single pole double throw）RF switch.
Specifically, the input switch unit 11 connects M radio-frequency coil passage：Radio-frequency coil passage I1, radio-frequency coil
Passage I2..., radio-frequency coil passage Im..., radio-frequency coil passage IM-1, radio-frequency coil passage IM, 1≤m≤M.The output is opened
Close unit 12 and connect N number of receiver channel：Receiver channel O1, receiver channel O2..., receiver channel On..., receiver
Passage ON-1, receiver channel ON, 1≤n≤N.
Matrix switch, input switch and output switch in the channel selection device also include being suitable to receive different controls
The control terminal of signal processed（It is not shown）.With by radio-frequency coil passage I1On radio signal transmission to receiver channel O2Exemplified by, control
System and the radio-frequency coil passage I1The input switch K1 of connection control terminal, which receives control signal, makes the input switch K1's
First end is connected with the second end, the radio-frequency coil passage I1On radiofrequency signal reach matrix switch K2 first end；Control
The control signal of the matrix switch K2 makes the first end of the matrix switch K2 be connected with the second end, the radio-frequency coil passage
I1On radiofrequency signal reach output switch K3 the second end；Controlling the control signal of the output switch K3 opens the output
The first end for closing K3 is connected with the second end, the radio-frequency coil passage I1On radiofrequency signal reach receiver channel O2.Do not use
To the first end of input switch be connected with three ends, the first end for the output switch do not used is connected with the 3rd end.
However, the first end positioned at the matrix switch of same a line is connected, positioned at the second end phase of the matrix switch of same row
Even, therefore, when forming a passage, it is located at the matrix switch turned in the switch matrix unit 13 with a line and same row
Matrix switch, the leakage of signal can be caused, the insertion loss of passage is larger.
The content of the invention
What the present invention solved be passage in signals transmission insertion loss it is big the problem of.
To solve the above problems, technical solution of the present invention provides a kind of switch arrays, the switch arrays switch including H levels
Unit, H >=2；Wherein, first order switch element includes at least two switches sets, and h levels switch element includes at least one switch
Group, 1 ＜ h ＜ H, H levels switch element include a switches set, and each switches set includes at least one switch, the H levels switch
At least one switches set includes at least two switches in unit, and the quantity switched in rear stage switch element is opened less than previous stage
Close the quantity switched in unit；The switch includes first end and the second end, positioned at the first end phase of the switch of same switches set
Connect and be used as the common port of place switches set, in the second end and previous stage switch element of the switch in rear stage switch element
The common port of switches set connects one to one.
Optionally, the switch also includes control terminal；Each switches set in same one-level switch element includes J
Switch, J >=2, and the control terminal of j-th of switch is connected in each switches set, 1≤j≤J.
Based on above-mentioned switch arrays, technical solution of the present invention also provides a kind of channel selection device, the channel selecting dress
Put including：M switch arrays, the switch arrays are above-mentioned switch arrays；M the first control units, m-th first control are single
The common port that member is suitable to the switches set of the H level switch elements in m-th of switch arrays of control is connected with m-th of first passage, and 1
≤m≤M；N number of second control unit, n-th of second control units are suitable to control the first order switch in each switch arrays single
Second end of n-th of switch of member is connected with n-th of second channel, 1≤n≤N.
Optionally, first control unit includes first end, the second end and the 3rd end, m-th first control units
First end correspondingly connects m-th of first passage, m-th of switch arrays of the corresponding connection in the second end of m-th of first control units
The common port of the switches set of H level switch elements in row, the 3rd end of m-th of first control units are connected by first resistor
To ground；
Second control unit includes first end, the second end and the 3rd end, the first end pair of n-th of second control units
N-th of second channel should be connected, the second end of n-th of second control units correspondingly connects first in each switch arrays
Second end of n-th of switch of level switch element, the 3rd end of n-th of second control units is connected to ground by second resistance.
Based on above-mentioned switch arrays, technical solution of the present invention also provides another channel selection device, the channel selecting
Device includes：X first switch array, the first switch array are above-mentioned switch arrays；Y second switch array, it is described
Second switch array is above-mentioned switch arrays, and y-th of switch of the first order switch element of x-th of first switch array and the
X-th of the first order switch element of y second switch array switch is same switch, 1≤y≤Y, 1≤x≤X；X the
One control unit, x-th of first control units are suitable to the switch of the H level switch elements in x-th of first switch array of control
The common port of group is connected with x-th of first passage, 1≤x≤X；Y the second control units, y-th of second control units are suitable to control
The common port for making the switches set of the H level switch elements in y-th of second switch array is connected with y-th of second channel, 1≤y
≤Y。
Optionally, the order of X first switch array is arranged by first direction, is opened in each first switch array per one-level
The order for closing all switches of unit is arranged by the first direction, and the order of the switches set per one-level switch element presses described the
One direction arranges；The order of Y second switch array is arranged by second direction, and per one-level, switch is single in each second switch array
The order of all switches of member is arranged by the second direction, and the second party is pressed per the order of the switches set of one-level switch element
To arrangement.
Optionally, the first direction is from left to right, the second direction is from top to bottom.
Technical solution of the present invention also provides a kind of magnetic resonance system, and the magnetic resonance system includes radio-frequency coil and reception
Machine, in addition to above-mentioned channel selection device, first passage and second channel, the first passage and second channel are respectively radio frequency
Coil channel and receiver channel.
Compared with prior art, technical scheme has advantages below：
Switch arrays include multiple-pole switch unit, and every grade of switch element includes switches set again, positioned at opening for same switches set
The first end of pass is connected and the common port of switches set where being used as, the second end of the switch in rear stage switch element and previous stage
The common port of switches set in switch element connects one to one.When signal transmits in the switch arrays, due to switch arrays
Switch in row positioned at the different groups of same level switch element is not attached to, therefore, the switch passed through in every grade of switch element with signal
Signal will not be caused to reveal positioned at different groups of switches, so as to reduce the insertion loss of passage.
In alternative, each switches set in one-level switch element includes the switch of identical quantity, and is located at
The control terminal of the switch of each switches set same position is connected, and receives identical control signal, therefore, it is possible to reduce produces control
The device of signal, reduces cost.On the other hand, due to the reduction of control signal, the signal wire for transmitting the control signal is corresponding
Reduce, reduce further cost.
A kind of channel selection device that technical solution of the present invention provides includes multiple switch arrays, due to the switch
Array reduces the insertion loss of passage, and therefore, the channel selection device accordingly reduces the insertion loss of passage.
Another channel selection device that technical solution of the present invention provides includes multiple first switch arrays and multiple second
Switch arrays, the structure of the first switch array and second switch array is identical with the structure of above-mentioned switch arrays, by institute
State first switch array and second switch array reduces the insertion loss of passage, therefore, the channel selection device enters one
Step reduces the insertion loss of passage.
Brief description of the drawings
Fig. 1 is a kind of structural representation of existing channel selection device；
Fig. 2 is the structural representation of the switch arrays of the embodiment of the present invention 1；
Fig. 3 is the structural representation of the switch arrays of the embodiment of the present invention 2；
Fig. 4 is the structural representation of the switch arrays of the embodiment of the present invention 3；
Fig. 5 is the structural representation of the channel selection device of the embodiment of the present invention 4；
Fig. 6 is the structural representation of the channel selection device of the embodiment of the present invention 5.
Embodiment
Just as described in the background art, the channel selection device shown in Fig. 1, positioned at the of the matrix switch of same a line
One end is connected, and is connected positioned at the second end of the matrix switch of same row.When forming a signal transmission passage, the cubicle switchboard
Only has a matrix switch conducting in array element 13.But it is located at the matrix with a line and same row with the matrix switch of conducting
Switch, due to being connected with the matrix switch of the conducting, can cause the leakage of signal, and the insertion loss of passage is larger.
Technical solution of the present invention provides a kind of switch arrays, and the switch arrays include：H level switch elements, H >=2, i.e. institute
Stating switch arrays includes at least two-stage switch element.
First order switch element includes at least two switches sets, and H levels switch element includes a switches set, and h levels are opened
Closing unit includes at least one switches set, 1 ＜ h ＜ H.
Each switches set includes at least one switch, and at least one switches set is included at least in the H levels switch element
Two are switched, and the quantity switched in rear stage switch element is less than the quantity switched in previous stage switch element, i.e. the first order is opened
The switch closed in unit is most.
The switch includes first end and the second end, where being connected positioned at the first end of the switch of same switches set and being used as
The common port of switches set, the second end of the switch in rear stage switch element are public with the switches set in previous stage switch element
End connects one to one.
When signal transmits in the switch arrays, each switches set only has a switch conduction, reduces signal transmission
The switch connected on passage, so as to reduce the insertion loss of passage.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Embodiment 1
Fig. 2 is the structural representation of the switch arrays of the embodiment of the present invention 1, and the switch in the switch arrays includes first
End and the second end, the switch can be RF switch.In the present embodiment, to form the switch of switch arrays as single-pole single-throw(SPST
RF switch exemplified by illustrate.With reference to figure 2, the switch arrays include three step switch unit；The three step switch unit
Respectively first order switch element 21, second level switch element 22 and third level switch element 23.
The first order switch element 21 includes three switches sets, and the second level switch element 22 includes two switches
Group, the third level switch element 23 include a switches set, and each switches set includes at least one switch.Opened positioned at same one-level
Close the switch that in unit and first end is connected and form a switches set, in the different switches sets in same one-level switch element
Switch is not attached to.
Specifically, the first order switch element 21 includes switches set 211, switches set 212 and switches set 213, wherein, institute
Stating switches set 211 includes three switches：Switch K211, switch K212 and switch K213, the switch K211, switch K212 and open
The first end for closing K213 is connected and is used as the common port of the switches set 211；The switches set 212 includes two switches：Switch
K214 and switch K215, the switch K214 are connected with the first end for switching K215 and are used as the common port of the switches set 212；
The switches set 213 includes a switch：Public affairs of switch K216, the switch K216 first end as the switches set 213
End altogether.
The second level switch element 22 includes switches set 221 and switches set 222, wherein, the switches set 221 includes two
Individual switch：Switch K221 and switch K222, the switch K221 are connected with the first end for switching K222 and are used as the switches set
221 common port, the second end of the switch K221 correspondingly connect the public affairs of the switches set 211 in the first order switch element 21
End altogether, the second end of the switch K222 correspondingly connects the common port of the switches set 212 in the first order switch element 21；Institute
Stating switches set 222 includes a switch：K223 is switched, the first end of the switch K223 is as the public of the switches set 222
End, the second end of the switch K223 correspondingly connects the common port of the switches set 213 in the first order switch element 21, i.e. institute
The second end for stating switch K223 correspondingly connects the first end of the switch K216.
The third level switch element 23（That is afterbody switch element）Including switches set 231, wherein, the switches set
231 include two switches：Switch K231 and switch K232, the switch K231 are connected with the first end for switching K232 and are used as institute
The common port of switches set 231 is stated, the second end of the switch K231 correspondingly connects the switch in the second level switch element 22
The common port of group 221, the second end of the switch K232 correspondingly connects the switches set 222 in the second level switch element 22
Common port.
The first order switch element 21 of the switch arrays of the present embodiment includes six switches, and it is logical to may make up six signal transmission
Road, six signal transmission passages, the connected switch in six one end of generally use are formed in the prior art.One is formed in the prior art
During individual signal transmission passage, there is a switch conduction in the connected switch in six one end, remaining five switches can cause signal
Leakage.
Because the switch arrays of the present embodiment include multiple-pole switch unit, every grade of switch element includes multiple switch again, and
And the quantity switched in rear stage switch element is less than the quantity switched in previous stage switch element.When signal is in the present embodiment
When being transmitted in the switch arrays of offer, because the switch for being located at the different groups of same level switch element in switch arrays is not attached to, because
This, the switch passed through in every grade of switch element from signal will not cause signal to reveal positioned at different groups of switch, so as to reduce
The insertion loss of passage.
For example, working as needs by the first end of the switch K231 in the third level switch element 23 to transmit signal to described
During the second end of the switch K211 in first order switch element 21, the switch K231, switch K221 and switch K211 conductings, structure
Into signal transmission passage.
When needing to transmit signal to described first by the first end of the switch K232 in the third level switch element 23
During the second end of the switch K216 in level switch element 21, the switch K232, switch K223 and switch K216 conductings, letter is formed
Number transmission channel.
It should be noted that the quantity switched in each switches set in one-level switch element can with identical,
Can be different.In the present embodiment, the quantity switched in each switches set of same one-level switch element is different, below with position
Illustrated exemplified by the quantity that is switched in each switches set with one-level switch element is identical.
Embodiment 2
Illustrated in the present embodiment or exemplified by forming the switches of switch arrays as the RF switch of single-pole single-throw(SPST, institute
Stating the switch in switch arrays includes first end and the second end, in addition to control terminal.It is each in same one-level switch element
Switches set includes J switch, J >=2, and the control terminal of j-th of switch is connected in each switches set, 1≤j≤J.
Fig. 3 is the structural representation of the switch arrays of the embodiment of the present invention 2.With reference to figure 3, the switch arrays include three-level
Switch element；The three step switch unit is respectively first order switch element 31, second level switch element 32 and third level switch
Unit 33.
The first order switch element 31 includes switches set 311, switches set 312, switches set 313 and switches set 314, its
In, the switches set 311 includes two switches：Switch K311 and switch K312；The switches set 312 includes two switches：Open
Close K313 and switch K314；The switches set 313 includes two switches：Switch K315 and switch K316；The switches set 316 is wrapped
Include two switches：Switch K317 and switch K318.
The second level switch element 32 includes switches set 321 and switches set 322, wherein, the switches set 321 includes two
Individual switch：Switch K321 and switch K322；The switches set 322 includes two switches：Switch K323 and switch K324.
The third level switch element 33 includes switches set 331, wherein, the switches set 331 includes two switches：Switch
K331 and switch K332.
The first end of each switch and the annexation at the second end are referred to shown in Fig. 3 and embodiment in the switch arrays
1 description, will not be repeated here, and the connection only to the control terminal of each switch below is described in detail.
With reference to figure 3, with one-level switch element, the control terminal of the switch of same position is connected in each switches set.
Specifically, the control terminal of the switch K311 in the first order switch element 31, the control terminal for switching K313, switch K315
Control terminal with switch K317 control terminal be connected, the control terminal of the switch K312 in the first order switch element 31,
The control terminal for switching K314, the control terminal for switching K316 are connected with switch K318 control terminal；Switched positioned at the second level single
The control terminal of switch K321 in member 32 is connected with switch K323 control terminal, opening in the second level switch element 32
The control terminal for closing K322 is connected with switch K324 control terminal.
For example, working as needs by the first end of the switch K331 in the third level switch element 33 to transmit signal to described
During the second end of the switch K311 in first order switch element 31, the switch K331, switch K321 and switch K311 conductings, structure
Into signal transmission passage.
Because the control terminal of the switch K323 is connected with the control terminal of the switch K321, the switch K323 conductings；
Due to the control terminal of the switch K313, switch K315 control terminal and switch K317 control terminal and the control of the switch K311
End processed is connected, the switch K313, switch K315 and switch K317 conductings.But due to the switch K332 by, therefore,
Signal will not be by other switches, and the signal transmission that can only pass through the switch K331, switch K321 and switch K311 compositions is logical
Transmit in road.
In the same one-level switch element of the present embodiment, the control terminal phase of the switch of same position in each switches set
Even, same control signal is shared, and the control terminal each switched in the prior art is not attached to, the control terminal each switched receives
Different control signals.
Therefore, compared with prior art, the switch arrays of the present embodiment are not only able to reduce the insertion loss of passage, may be used also
To reduce the device for producing control signal, cost is reduced.On the other hand, due to the reduction of control signal, the control letter is transmitted
Number signal wire accordingly reduce, reduce further cost.
Embodiment 3
Fig. 4 is the structural representation of the switch arrays of the embodiment of the present invention 3.With reference to figure 4, the area of embodiment 3 and embodiment 2
It is not：The quantity switched in each switches set of one-level switch element can be with identical, and is located at another grade of switch element
Each switches set in the quantity that switchs can be different.
With reference to figure 4, the switch arrays include three step switch unit：First order switch element 41, second level switch element
42 and third level switch element 43.Wherein, the first order switch element 41 includes three switches sets, and each switches set includes phase
With the switch of quantity；The second level switch element 42 includes two switches sets, and each switches set includes the switch of varying number.
The concrete structure of the switch arrays of the present embodiment will not be repeated here with reference to the description of figure 4 and embodiment 1 and embodiment 2.
Embodiment 4
A kind of channel selection device is present embodiments provided, the channel selection device includes：M switch arrays, M the
One control unit and N number of second control unit, N are the number of switches in first order switch element in the switch arrays.
Wherein, the switch arrays include H level switch elements, and concrete structure can be either switch battle array shown in Fig. 2 to Fig. 4
The structure of row；M-th of first control units are suitable to the H levels in m-th of switch arrays of control（That is, afterbody）Switch is single
The common port of the switches set of member is connected with m-th of first passage, 1≤m≤M；N-th of second control units are suitable to control and each opened
The second end for closing n-th of switch of the first order switch element in array is connected with n-th of second channel, 1≤n≤N.
With the switch arrays include two-stage switch element, positioned at the switch arrays first order switch element it is each
Exemplified by switches set includes 5 switches, Fig. 5 is the structural representation of the channel selection device of the present embodiment.
Specifically, the M switch arrays are：Switch arrays R1, switch arrays R2..., switch arrays RM-1, switch arrays
RM；
The M the first control units are：First control unit C11, the first control unit C12..., the first control unit
C1M-1, the first control unit C1M, wherein, the first control unit C11Suitable for controlling the switch arrays R1In the second level
Switch element（That is afterbody switch element）Switches set common port and first passage I1Connection, first control unit
C12Suitable for controlling the switch arrays R2In second level switch element switches set common port and first passage I2Even
Connect ..., the first control unit C1M-1Suitable for controlling the switch arrays RM-1In second level switch element switches set
Common port and first passage IM-1Connection, the first control unit C1MSuitable for controlling the switch arrays RMIn the second level open
Close the common port and first passage I of the switches set of unitMConnection；
N number of second control unit is：Second control unit C21..., the second control unit C2N, wherein, described second
Control unit C21Suitable for controlling the switch arrays R1, switch arrays R2..., switch arrays RM-1, switch arrays RMIn first
Second end of first switch of level switch element and second channel O1Connection ..., the second control unit C2NSuitable for control
The switch arrays R1, switch arrays R2..., switch arrays RM-1, switch arrays RMIn the n-th of first order switch element open
The second end closed and second channel ONConnection.
The structure of the M the first control units is identical, and the structure of N number of second control unit is identical, below with described the
One control unit C11With the second control unit C21Exemplified by first control unit of the present embodiment and the structure of the second control unit
Illustrate.
With reference to figure 5, in the present embodiment, the first control unit C11Including first end, the second end and the 3rd end.Institute
State the first control unit C11First end correspondingly connect the first passage I1, the first control unit C11Two port
The switch arrays R should be connected1In second level switch element switches set common port, the first control unit C11The 3rd end
It is connected to ground by first resistor R51.
The second control unit C21Including first end, the second end and the 3rd end.The second control unit C21First
End is corresponding to connect the second channel O1, the second control unit C21The second end correspondingly connect the switch arrays R1, open
Close array R2..., switch arrays RM-1, switch arrays RMIn first of first order switch element switch the second end, it is described
Second control unit C21The 3rd end be connected to ground by second resistance R52.
It should be noted that the M the first control units and N number of second control unit can be single-pole double throw
RF switch, the resistance value of the first resistor R51 and second resistance R52 can be with equal, and specific resistance value can be according to passage
The power of the signal of upper transmission is configured.
The channel selection device of the present embodiment is connected between the first passage and second channel, suitable for by any one
Signal on first passage is transmitted to any one second channel, or by the signal on any one second channel transmit to appoint
One first passage of meaning.
To need the first passage I1On signal transmit to the second channel ONExemplified by, control and described first
Passage I1First control unit C1 of connection1First end be connected with the second end, by the first passage I1On signal transmit to
The switch arrays R1；
The first passage I1On signal by the switch arrays R1Afterbody switch element input, by described
Switch arrays R1Transmission, the first passage I1On signal by the switch arrays R1First order switch element n-th
Switch output to the second channel ONSecond control unit C2 of connectionNThe second end；
Control the second control unit C2NFirst end be connected with the second end, the first passage I1On signal transmission
To the second channel ON, signal is transmitted.
For except the first passage I1Outer first passage, control the first end of the first coupled control unit with
Three-terminal link；For except the second channel ONOuter second channel, control the of the second coupled control unit
One end and three-terminal link.
In the present embodiment, the first passage is signal input channel, and the second channel is signal output channels,
In other embodiment, the second channel can be signal input channel, and the first passage is signal output channels, the present invention
It is without limitation.The process that signal is transmitted to the first passage by the second channel refers to above description, herein not
Repeat again.
The channel selection device of the present embodiment includes M switch arrays, when needing to transmit signal to by first passage
During two passages, signal is transmitted to second channel by the second control unit again by switch arrays.Because the switch arrays reduce
The insertion loss of passage, therefore, the insertion loss of the channel selection device accordingly reduces.
It should be noted that the order of switch arrays described in the present embodiment is by direction arrangement from left to right, i.e., it is each
The order of all switches in switch arrays per one-level switch element is by direction arrangement from left to right, per one-level switch element
The order of switches set is by direction arrangement from left to right.In other embodiments, the order of the switch arrays can also by from
The direction arrangement of top to bottm.
Embodiment 5
Present embodiments provide another channel selection device.The channel selection device includes：X first switch battle array
Row, Y second switch array, X the first control units and Y the second control units, X are first in the second switch array
Number of switches in level switch element, Y are the number of switches in first order switch element in the first switch array.
Wherein, the first switch array and second switch array include H level switch elements, and concrete structure can be figure
The structure of either switch array shown in 2 to Fig. 4, y-th of the first order switch element of x-th of first switch array switch and the
X-th of switch of the first order switch element of y second switch array is same switch；X-th of first control units are suitable to
The common port of the switches set of the H level switch elements in x-th of first switch array is controlled to be connected with x-th of first passage, 1≤
x≤X；Y-th of second control units are suitable to the public affairs of the switches set of the H level switch elements in y-th of second switch array of control
End is connected with y-th of second channel altogether, 1≤y≤Y.
Include two-stage switch element with the first switch array and second switch array, positioned at the first switch battle array
Each switches set of the first order switch element of row includes 5 switches, the first order positioned at the second switch array switchs
Exemplified by each switches set of unit includes two switches, Fig. 6 is the structural representation of the channel selection device of the present embodiment.
The order of the X first switch array is arranged by first direction, is switched in each first switch array per one-level
The order of all switches of unit is arranged by the first direction, and the order of the switches set per one-level switch element presses described first
Direction arranges；
The order of the Y second switch array is arranged by second direction, is switched in each second switch array per one-level
The order of all switches of unit is arranged by the second direction, and the order of the switches set per one-level switch element presses described second
Direction arranges.
With reference to figure 6, in the present embodiment, the first direction for from left to right, the second direction for from top to bottom,
In other embodiment, the first direction and second direction can also be other directions, for example, the first direction be from the right side to
A left side, the second direction is from top to bottom, this is not limited by the present invention.
Specifically, the X first switch array is：First switch array L1, first switch array L2..., first switch
Array LX-1With first switch array LX；
X-th of the first order switch element of y-th of second switch array in Y second switch array switch with
Y-th of the first order switch element of x-th of first switch array switch is same switch, 1≤x≤X, 1≤y≤Y.Example
Such as, the of first of the first order switch element of first second switch array switch K61 and first switch array L1
First switch K61 of one-level switch element is same switch；The of the first order switch element of the Y second switch array
K62 and first first switch array L of one switch1The Y of first order switch element switch K62 be same switch；
- 1 switch K63 and -1 first switch array L of X of X of the first order switch element of first second switch arrayX-1's
First switch K63 of first order switch element is same switch.
The X the first control units are：First control unit C11, the first control unit C12..., the first control unit
C1X-1, the first control unit C1X, wherein, the first control unit C11Suitable for controlling the first switch array L1In
Secondary switch unit（That is afterbody switch element）Switches set common port and first passage I1Connection, first control
Unit C12Suitable for controlling the first switch array L2In second level switch element switches set common port and first passage
I2Connection ..., the first control unit C1X-1Suitable for controlling the first switch array LX-1In second level switch element
The common port of switches set and first passage IX-1Connection, the first control unit C1XSuitable for controlling the first switch array LX
In second level switch element switches set common port and first passage IXConnection；
The Y the first control units are：Second control unit C21..., the second control unit C2Y, wherein, described second
Control unit C21Suitable for the second level switch element in first second switch array of control（That is afterbody switch element）'s
The common port of switches set and second channel O1Connection ..., the second control unit C1YSuitable for controlling the Y second switch array
In second level switch element switches set common port and second channel OYConnection.
First control unit and second control unit can be single-pole double throw RF switch, and 26S Proteasome Structure and Function divides
It is not similar with the first control unit in embodiment 4 and the 26S Proteasome Structure and Function of the second control unit, it is not described in detail herein.Letter
Transmitting procedure number in the channel selection device of the present embodiment is similar to Example 4, will not be repeated here.
The channel selection device of the present embodiment includes first switch array and second switch array, due to the first switch
Array and second switch array reduce the insertion loss of passage, and therefore, signal enters the channel selection device and output institute
When stating channel selection device, the insertion loss of passage reduces, and further reduces the Channel depletion of the channel selection device.
Technical solution of the present invention additionally provides a kind of magnetic resonance imaging system, and the magnetic resonance imaging system includes radio frequency line
Circle, receiver, first passage and second channel, in addition to any one channel selection device shown in Fig. 5 or Fig. 6, described
One passage and second channel are respectively radio-frequency coil passage and receiver channel.
When the first passage is radio-frequency coil passage, the second channel is receiver channel, the first passage
Quantity be more than the second channel quantity；When the second channel is radio-frequency coil passage, the first passage is reception
During machine passage, the quantity of the first passage is less than the quantity of the second channel.
As a rule, in magnetic resonance system, the quantity of the radio-frequency coil passage and the receiver channel is at least
Tens, the switch for causing in channel selection device of the prior art shown in Fig. 1 signal to reveal is very more, and uses of the invention
The channel selection device of embodiment 4 and embodiment 5, due to being located at the switch of the different groups of same level switch element in switch arrays not
It is connected, therefore, the switch passed through in every grade of switch element from signal will not cause signal to reveal positioned at different groups of switch, significantly
Reduce the insertion loss of passage.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, this is not being departed from
In the spirit and scope of invention, it can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (7)
- A kind of 1. channel selection device, it is characterised in that including：M switch arrays, the switch arrays include H level switch elements, H >=2；Wherein, first order switch element is included at least Two switches sets, H levels switch element include at least one switches set, and each switches set includes at least one switch, the H levels At least one switches set includes at least two switches in switch element, and the quantity switched in rear stage switch element is less than previous The quantity switched in level switch element；The switch includes first end and the second end, positioned at the first of the switch of same switches set End is connected and is used as the common port of place switches set, the second end of the switch in rear stage switch element and previous stage switch element In the common port of switches set connect one to one；M the first control units, m-th of first control units are suitable to the H level switch elements in m-th of switch arrays of control The common port of switches set is connected with m-th of first passage, 1≤m≤M；N number of second control unit, n-th of second control units are suitable to control the first order switch element in each switch arrays Second end of n-th of switch is connected with n-th of second channel, 1≤n≤N.
- 2. channel selection device according to claim 1, it is characterised in that first control unit include first end, Second end and the 3rd end, the first end of m-th of first control units correspondingly connect m-th of first passage, m-th first controls The common port of the switches set of H level switch elements in m-th of switch arrays of the corresponding connection in second end of unit processed, m-th the 3rd end of one control unit is connected to ground by first resistor；Second control unit includes first end, the second end and the 3rd end, and the first end of n-th of second control units correspondingly connects N-th of second channel is connect, the first order that the second end of n-th of second control units is correspondingly connected in each switch arrays is opened The second end of n-th of switch of unit is closed, the 3rd end of n-th of second control units is connected to ground by second resistance.
- 3. channel selection device according to claim 1 or 2, it is characterised in that the switch also includes control terminal；It is located at Include J switch, J >=2, and j-th of the control switched in each switches set with each switches set in one-level switch element End is connected, 1≤j≤J.
- 4. channel selection device according to claim 1 or 2, it is characterised in that the switch is RF switch.
- 5. channel selection device according to claim 4, it is characterised in that the RF switch is that single-pole single-throw(SPST radio frequency is opened Close.
- 6. channel selection device according to claim 1, it is characterised in that first control unit is penetrated for single-pole double throw Frequency switchs, and second control unit is single-pole double throw RF switch.
- 7. a kind of magnetic resonance imaging system, including radio-frequency coil and receiver, it is characterised in that also including claim 1 to 6 times Channel selection device, first passage and second channel described in one, the first passage and second channel are respectively radio frequency line Enclose passage and receiver channel.
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| CN201310410914.0A CN104414639B (en) | 2013-09-10 | 2013-09-10 | Switch arrays, channel selection device and magnetic resonance imaging system |
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| CN107505545A (en) * | 2017-08-14 | 2017-12-22 | 绵阳市维博电子有限责任公司 | A kind of railway signal cable Insulation Live Testing method and system |
| CN110658562A (en) * | 2019-10-23 | 2020-01-07 | 中国工程物理研究院电子工程研究所 | Millimeter wave transceiving switch array and control method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157687A (en) * | 1994-09-14 | 1997-08-20 | 西门子公司 | Tree-structured optical 1XN and NXN switch matrices |
| US6389191B1 (en) * | 1997-07-18 | 2002-05-14 | Jds Uniphase Inc. | Thermo-optical cascaded switch comprising gates |
| US6570684B1 (en) * | 1996-04-30 | 2003-05-27 | Agilent Technologies, Inc. | Optical routing/switching systems |
| US6585382B1 (en) * | 1996-04-30 | 2003-07-01 | Agilent Technologies, Inc. | Optical systems using switched mirrors |
| US6661308B2 (en) * | 2000-02-22 | 2003-12-09 | Trilithic, Inc. | One-by-N switch matrix |
| CN101261315A (en) * | 2007-03-08 | 2008-09-10 | 株式会社东芝 | Magnetic resonance imaging apparatus |
| CN102686154A (en) * | 2010-11-30 | 2012-09-19 | 株式会社东芝 | Multi-channel high frequency signal switch device and magnetic resonance imaging apparatus provided with same |
-
2013
- 2013-09-10 CN CN201310410914.0A patent/CN104414639B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157687A (en) * | 1994-09-14 | 1997-08-20 | 西门子公司 | Tree-structured optical 1XN and NXN switch matrices |
| US6570684B1 (en) * | 1996-04-30 | 2003-05-27 | Agilent Technologies, Inc. | Optical routing/switching systems |
| US6585382B1 (en) * | 1996-04-30 | 2003-07-01 | Agilent Technologies, Inc. | Optical systems using switched mirrors |
| US6389191B1 (en) * | 1997-07-18 | 2002-05-14 | Jds Uniphase Inc. | Thermo-optical cascaded switch comprising gates |
| US6661308B2 (en) * | 2000-02-22 | 2003-12-09 | Trilithic, Inc. | One-by-N switch matrix |
| CN101261315A (en) * | 2007-03-08 | 2008-09-10 | 株式会社东芝 | Magnetic resonance imaging apparatus |
| CN102686154A (en) * | 2010-11-30 | 2012-09-19 | 株式会社东芝 | Multi-channel high frequency signal switch device and magnetic resonance imaging apparatus provided with same |
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