JPH0560734A - Switching device of matrix - Google Patents

Abstract

PURPOSE:To enable realization of various examples of selection by one printed circuit board, by controlling changeover of crosspoint switches selectively and by changing connection of input and output lines arbitrarily. CONSTITUTION:A matrix circuit 4 comprises input and output lines numbering eight respectively, cross-point switches 5 and connection lines L1 to L15. A printed circuit board 32 controlling the number of the connection lines of the input and output lines of the matrix circuit 4 selectively comprises fifteen control signal lines and seven changeover signal lines R9 to R15 joined to fifteen connection lines, and cross-point switches 32A provided in intersecting point parts for connection and disconnection of a signal line R and the signal lines R9 to R15. Signal lines R1 to R8 are connected to external terminals 8 to 1. As for the relationship in connection of each of these control and changeover signal lines with the switch 32A, the signal line R8, for instance, is connected directly to the terminal 1, connected indirectly to the changeover signal lines R9 to R11 through the switch 32A and joined to the connection line L1. By adding a switching circuit constructed of the printed circuit board 32 to the matrix circuit 4 in this way, arbitrary selection of the number of the connection lines of the input and output lines is enabled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a matrix switching device suitable for use in scanning switching in an electronic scanning ultrasonic inspection apparatus, memory address switching, display circuit element switching, and the like.

[0002]

2. Description of the Related Art A matrix circuit is composed of lines of length × width (n × m) (one is an input line and the other is an output line), and crosspoint switches provided at all intersections of these lines. The connecting vertical and horizontal input / output line tracks are to be connected. Matrix circuits are widely used in electronic scanning ultrasonic inspection devices, memories, display circuits, and the like. The electronic scanning type ultrasonic inspection apparatus is used in a focus focusing method using a delay time in which a plurality of ultrasonic signals are focused on one focus.

FIG. 16 shows an 8 × 8 matrix circuit 4 and a switching circuit 30. The switching circuit 30 is a printed board having a function of automatically updating the connection contents of the eight input lines A to H and the eight output lines a to b. Symbols marked with ◯ and Δ at the intersections of the matrix are cross point switches. The same signal in each diagonal direction is a row of switches that are driven simultaneously, and there are a total of 15 rows. The switch rows are connected by connection lines L _{1 to} L ₁₅ . However, the end switches (H-a intersection, A-h intersection) do not have a connecting line because there is only one switch, but it is assumed for the sake of explanation. Furthermore,
15 the connection lines L ₁ ~L ₁₅ is connected fifteen control signal line leads to the control terminal ~.

For example, the black circle marks Aa intersection to Hh intersection are simultaneously selected, and the white circle marks Ac intersection to Fh intersection, Ga intersection, and Hb intersection are black circles. It is selected at a time different from the mark at the same time. To determine these selections are timing signals T ₁ through T ₈ Add to terminals ~. The timing signals T _{1 to} T ₈ are generated sequentially as T ₁ → T ₂ → ... T ₈ → T ₁ → T ₂ ... At T ₁ , the switches marked with black circles are selected and turned on at the same time, and T ₂ Then the upper triangle (△
Select the switches marked with () and turn them on at the same time. The connection by turning on the switch is as follows. (1) Application of T ₁ Aa, Bb, Cc, ..., Hh are connected. (2) Application of T ₂ Ba, Cb, Cd, ..., Hg, and Ah are connected. (3) T ₃ applies C-a, D-b, E-c, ..., H-f, A-g, B-h
Creates a connection of. ……………………………………………
(4) Application of T ₈ Creates connection of H-a, A-b, B-c, ..., G-h. In this way, by sequentially applying T _{1 to} T ₈ , the eight linked states of A to H and a to h are updated one after another.

On the other hand, in FIG. 17, the 8 × 8 matrix circuit 4 is used as it is, and another switching circuit 31 is used in place of the switching circuit 30, and six vertical and horizontal input lines A to
This is an example in which F and the output lines a to f are connected. One of the characteristics is that two of the eight vertical and horizontal lines (terminals) of the matrix circuit 4 are treated as empty lines (terminals), excluded from the beginning, and not treated as a selection target. is there. Therefore, even the crosspoint switch connected to the empty terminal cannot be turned on. In the figure, the switches that cannot be turned on do not use the symbolic display method. Further, the number of terminals to which the timing signal is applied may be six, and the two terminals at the right end are not used. The connection in this matrix circuit is performed by the timing signals T ₁ , T ₂ , ..., T ₆ applied to the terminals, and is as follows. (1) Application of T ₁ Aa, Bb, ..., Ff are connected. (2) T ₂ applied B-a, C-b, ..., producing a connection of F-e, A-f. (3) T ₃ applies C-a, D-b, ..., producing a connection of F-d, A-e, B-f. ……………………………………… (4) Applying T ₆ Create a connection of F−a, A−b, ..., E−f. The above FIG. 17 shows an example of selection of 6 × 6, but in addition to this, 5
There are various selection examples such as x5, 4x4, and 2x2.

[0006]

In order to realize these various selection examples, the matrix circuits may all be the same, but the configuration of the switching circuit is different for each selection example. This will be described with reference to the examples of FIGS. FIG.
17 is compared with FIG. 17, the difference between the 8 × 8 selection example and the 6 × 6 selection example depends on which timing terminal the timing signal is added to (8 × 8, the right first timing terminal is selected). as a starting point, applies a T ₁ through T _8, can be seen also as applied) a T ₁ through T ₆ of the 6 × 6 right third timing terminal as a starting point, in this regard, the eight timing terminals Various combinations such as 8 × 8 and 6 × 6 should be realized by the selection method, and the same switching circuit should be usable. However, the connection method of the timing terminal and the cross point switch is different between FIG. 16 and FIG. For example, the terminal of FIG. 16 is connected to the switch connection lines L ₇ and L ₁₀ , whereas the terminal of FIG. 17 at a position corresponding to this terminal is connected to the connection lines L ₇ and L ₁ . The terminals of FIG. 16 are switch connection lines L ₅ and L _9.
While the terminal of FIG. 17 corresponding to this terminal is connected to the connection lines L ₅ and L ₁₀ .

Therefore, in order to realize various selection methods, the connection method of the timing terminals is different for the same matrix circuit, and in reality, the same matrix circuit is connected to each selection method. The printed board 30 for 8 × 8 and the printed board 31 for 6 × 6 prepared in advance are prepared.
At the time of use, it was connected to the matrix circuit. The above is an example of ultrasonic waves, but switching the address of the memory or the display element of the display circuit has the same problem.

An object of the present invention is to provide a matrix switching device which enables various selection examples with one printed board.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a plurality of input lines arranged in one direction, a plurality of output lines intersecting the input lines and arranged in the other direction, and the input lines and the output lines. In a matrix circuit composed of a crosspoint switch for connecting and disconnecting an input line and an output line at each intersection with and, a control signal line for transmitting a switching signal of the crosspoint switch, the input line and the output line And a control means for selectively supplying a switching signal to the control signal line in order to arbitrarily change the number of connections to the control signal line (claim 1).

Further, according to the present invention, M input lines arranged in one direction and M arranged in the other direction crossing the input lines.
In a matrix circuit including a plurality of output lines and a cross point switch that connects and disconnects the input line and the output line at each intersection of the input line and the output line, a cross point switch array is provided for each diagonal direction. Simultaneously driving, (2M-1) switch connection lines provided for each switch row, (2M-1) control signal lines connected to the switch connection lines, and (2M-1) control signals Among the signal lines, M switching signal lines connected to M control signal lines from the end to the center, the (2M-1) control signal lines, and the M switching signal lines. Connection / disconnection switch installed at the connection / disconnection point, means for generating a timing signal determined by the number of selected input / output line connections N (1 ≦ N ≦ M), and connection / disconnection switch corresponding to the connection number N To turn on the timing signal and the timing signal (2M- ) And means for selectively applying the end in the number of control signal lines to the M control signal line to the center, and more (claim 2).

Further, according to the present invention, M input lines arranged in one direction, M output lines arranged in the other direction crossing the input lines, and each of the input line and the output line. A cross point switch that connects and disconnects the input line and the output line at the crossing part,
In the matrix circuit, the (2M-1) switch connection lines provided for each switch row for simultaneously driving the cross point switch rows in each diagonal direction and the (2M-
1) (2M-1) control signal lines connected to the switch connection lines, and M control signal lines from the end to the center of the (2M-1) control signal lines and the center (2M-1) control signal lines from immediately after to the other end,
Pinholes provided in (2M-1) control signal lines that can be connected by jumper wires under a correspondence relationship determined by the number of input / output line connections to be selected N (1≤N≤M), and the number of connections described above. Means for generating a timing signal determined by N, and means for selectively applying the timing signal to the M control signal lines from the end portion to the center of the (2M-1) control signals. (Claim 3).

The matrix circuit of the present invention is a matrix circuit used when transmitting and receiving an ultrasonic beam in an ultrasonic inspection apparatus (claim 4).

According to the present invention, the switching signal is selectively supplied to the control signal line so as to arbitrarily change the number of connections between the input line and the output line (claims 1 to 3). Further, according to the present invention, in addition to the cross point switch of the matrix circuit, a connection / disconnection switch for selecting a diagonal switch row is provided, and the number of connections between the input line and the output line is selected by selecting this switch. It can be changed arbitrarily (claims 2 and 3). Furthermore, according to the present invention, the number of connections between the input line and the output line is made variable by the combination of the control signal lines, and by selecting the combination together with the switching of the connection / disconnection switch,
The number of connections between the input line and the output line can be arbitrarily changed (claim 2). Further, according to the present invention, the number of connections between the input line and the output line can be arbitrarily changed by utilizing the pinhole and the jumper line (claim 3). Further, according to the present invention, the matrix circuit used for transmission / reception in the ultrasonic inspection apparatus can be used for switching (claim 4).

[0014]

1 is a diagram showing an embodiment of a switching device of the present invention. The switching device of this embodiment has the following configuration. Matrix circuit 4 ... This matrix circuit has the same configuration as the matrix circuit shown in FIG. 16 when M = 8, and has eight input lines A to H and eight output lines a to h.
And a cross point switch 5 for connecting and disconnecting the intersection. Further, the connection lines (lines) L _{1 to} L ₁₅ connecting the switch rows in the diagonal direction are also provided, which is also the same as in FIG. 16. Printed board 32 ... Selects and controls the number of input / output line connection lines of the matrix circuit 4, and 15 control signal lines connected to 15 ((2M-1) when expressed by M) connection lines. seven (expressed in M (M-1) present) switching signal line R ₉ to R _15, composed of a cross point switch 32A installed in contact-Danko point portions of the signal line R and R ₉ to R _15. 7
Among the 15 control signal lines R, the seven switching signal lines R _{9 to} R ₁₅ are the seven signal lines R ₁ to R ₁ from the left end to the center of the figure.
Signal lines connected to R ₇ , and these 7 signal lines R _{9 to} R
₁₅ are arranged in a direction intersecting with the signal lines R _{1 to} R ₇ (note that the signal lines R _{9 to} R ₁₅ are also control signal lines, but 1
They are arranged in the horizontal direction with respect to the five vertical signal lines R, and this is referred to as a switching signal line for convenience). Eight control signal lines R _{1 to} R ₈ from the end to the center of the control signal line R are connected to external terminals. A control signal line R and switching signal line R ₉ to R ₁₅ are adapted to be engaged and disengaged controlled such 28 crosspoint switch 32A of FIG. (Engaged and disengaged switch). The 28 cross point switches 32A are installed at positions corresponding to the input / output line connection lines of the matrix circuit 4.

The connection relationship between the control signal lines R _{1 to} R ₈ , the switching signal lines R _{9 to} R ₁₅ and the cross point switch 32A is shown below. Control signal line R ₈ ... A line which is directly connected to the external terminal and indirectly connected to the switching signal lines R ₉ , R ₁₀ and R ₁₁ via the switch 32A and connected to the switch connection line L ₁ of the matrix circuit. is there. Signal lines R ₇ , R ₁₅ are directly and commonly connected to external terminals, and the signal line R ₇ is connected to the connection line L ₂ and indirectly connected to R ₉ , R ₁₀ and R ₁₁ via the switch 32A. The signal line R ₁₅ is a line indirectly connected to the connection line L ₁₅ (which is the switch itself) via the switch 32A. Signal lines R ₆ , R ₁₄ ... Commonly connected directly to the external terminals, and the signal line R ₆ is connected to the connection line L ₃ and indirectly connected to R ₉ and R ₁₀ via the switch 32A. R ₁₄ is a line indirectly connected to the connection lines L ₁₃ and L ₁₄ via the switch 32A. The signal lines R ₅ , R ₁₃ ... Are directly and commonly connected to external terminals, and the signal line R ₅ is connected to the connection line L ₄ and indirectly connected to the signal lines R ₉ and R ₁₀ via the switch 32A. The signal line R ₁₃ is connected to the connection line L via the switch 32A.
It is indirectly connected to ₁₁ , L ₁₂ , and L ₁₃ .

The signal lines R ₄ , R ₁₂ are directly and commonly connected to the external terminals, and the signal line R ₄ is connected to the connection line L ₅ and indirectly connected to the signal line R ₉ via the switch 32A. The signal line R ₁₂ is indirectly connected to the connection lines L _{9 to} L ₁₂ via the switch 32A. Signal lines R _3, R ₁₁ ... are connected in common directly to the external terminal, further signal line R ₃ is connected indirectly to the signal line R ₉ via the concatenated and switch 32A to the connection line L _6, the signal line R ₁₁ is a connection line L ₂ via a switch 32A,
It is indirectly connected to L ₁₅ , L ₁ , L ₉ , L ₁₀ , and L ₁₁ . Signal lines R ₂ , R ₁₀ ... Commonly connected directly to the external terminals, the signal line R ₂ is connected to the connection line L ₇ , and the signal line R ₁₀ is connected.
Is connected via switch 32A to connection lines L ₄ , L ₁₃ , L ₃ ,
It is indirectly connected to L ₁₄ , L ₂ , L ₁₅ , L ₁ , L ₉ , and L ₁₀ . Signal lines R ₁ , R ₉ ... Directly connected in common to external terminals,
The signal line R ₁ is connected to the connection line L ₈ (the switch itself), and the signal line R ₉ is indirectly connected to the connection lines L _{6 to} L ₁ , L ₉ and L _{11 to} L ₁₅ via the switch 32A. ..

The above switching circuit 32 is 8 × 8, 7 × 7, 6 by selectively turning on 28 switches 32A.
This is a configuration in which all of x6, ..., 2 × 2 can be freely selected, and FIG. 2 shows an example of 8 × 8 selection. In the 8 × 8 selection, as shown in FIG. 2, _seven switches S _{1 to} S ₇ at the right end of the switch 32A are turned on. As a result, the external circuit configuration is substantially the same as that of FIG. 16, and by adding T _{1 to} T ₈ to the terminals ₁ and 2 one after another, as shown in FIG.
8 × 8 selection is made in the same selection procedure as.

FIG. 3 shows an example of 6 × 6 selection. In this selection, as shown in FIG. 3, the five switches S _{8 to} S ₁₂ are turned on.
To As a result, the external configuration is substantially the same as that in FIG. 17, and ₆ to ₆ are selected by the same selection procedure as that in FIG. 16 by sequentially adding T _{1 to} T ₆ to the terminals ~.

FIG. 4 shows an example of 2 × 2 selection. With this choice
Is the switch S₁₃Only turns on. In this state, the terminal
Signal to₁Is added to connect Ba and Ab.
It Then signal T to the terminal₂Is added, A-a, B-b
Are connected. The signal T₁When applied, switch
S₁₃Since it does not matter whether or not is ON, T₁S when applied₁₃
Turn OFF, T₂S only when applied₁₃Turn on
Good. The above selection examples of 8 × 8, 6 × 6, and 2 × 2 are as follows.
As shown in FIG. 5, from the right side of the matrix circuit
Although it was an example of selecting to the left side, it depends on the result of the external circuit.
As shown in Fig. 6, it is possible to select from left to right.
Is. FIG. 7 shows an embodiment for realizing FIG. this
Since the embodiment is symmetrical with the embodiment of FIG. 1, the details are omitted.
However, it is clear that similar number selection is possible.
U

FIG. 18 shows another embodiment. The difference from FIG. 1 is a switching circuit 40, and the other parts have exactly the same configuration. Switching circuit 40 of this embodiment
There are 35 pinholes 40A inside. The pinhole here means a pinhole on the female side where a pin (male side) attached to the tip of a jumper wire (crossover wire) can be freely removed. (Of course, if the tip of the jumper wire is a female pin (concave), 40A will be a male pin (convex).)

FIG. 19 is an enlarged view of a portion of the switching circuit of FIG. A symbol is attached to each of the 35 pinholes 40A, and the description will be made sequentially. First, consider the case where the number of input / output signal lines = 8. The previous embodiment corresponds to the case of FIG. 7
By connecting S and S8, U and U8, V and V8, W and W8, X and X8, Y and Y8, Z and Z8, respectively, using the jumper wire of this book, the connection becomes the same as the connection of FIG. , The same operation is possible.

Next, when the number of input / output signal lines = 6 (corresponding to FIG. 3), S, S6 and U are connected by using five jumper lines.
And U6, V and V6, W and W6, and X and X6 respectively, the connection is the same as in FIG. Other input / output signal lines may be connected in the same manner, and all cases 2 to 8 are listed in the table below.

[Table 1] When the number of input / output signal lines = N, the number of jumper lines used is (N-1).

The method of changing the number of input / output signal lines by using the jumper wire described above can be manufactured at a lower cost than the method of FIG. The reason will be described below. When the switching circuit 32 of FIG. 1 is formed of a printed circuit board, it is necessary to wire the signal lines running vertically on the front surface and the signal lines running horizontally on the back surface. On the other hand, the switching circuit 4 of FIG.
In the case of 0, there is only a signal line running in the vertical direction, so that it can be manufactured with a single-sided printed board. However, on the other hand, the number of input / output signal lines has to be changed manually by using a jumper line.
(In the case of FIG. 1, it is possible to automatically set.) In this embodiment, 40A is a pinhole that can be removed, but it may be a through hole of a printed circuit board. In this case,
Solder the jumper wires.

FIG. 8 shows an example of scanning switching in the electronic scanning ultrasonic inspection apparatus. The array probe 10 is composed of 128 transducers 10, and the 128 transducers 10 are
It is shown by (1) to 10 (128). It is assumed that the 128 oscillators 10 are simultaneously excited and the number of oscillators is 8, and the 8 oscillators are used to form one beam. Eight transducers are sequentially selected from the left side to the right side, and 121 beam formations in total are possible by 128 transducers 10. The control circuit 11 controls the selection of the transducer and the application of the drive voltage for ultrasonic radiation. An example and procedure of selecting transducers for every eight are as follows, as shown in FIG. However, in FIG. 9, AP is an array transducer pitch, SP is a sample pitch, B _{1 to} B ₁₂₁ are beams, and F _{1 to} F ₁₂₁ are focal points. First beam _{B 1 ... 10 (1) ~10} (8) second beam _{B 2 ... 10 (2) ~10} (9) third beam _{B 3 ... 10 (3) ~10} (10) ... ... ... ... ... …………… 121st beam B ₁₂₁ … 10 (121) -10 (12)
8) Eight oscillators 10 (1) to 10 (1) to 10 for forming the first beam
FIG. 10 shows a driving example of (8). Delay circuit 12 (1)-
The 12 (8), the pulse voltage P is inputted, the pulse voltage P ₁ to P _8, which is delayed occurs according to the delay time D ₁ to D _8. Vibrator 10 (1) 10 (8) emits an ultrasonic beam focused in a predetermined focal position is excited by P ₁ to P _8. The delay times D _{1 to} D ₈ are used for determining the focus of the beam, and when it is desired to obtain the beam B of the focus F, the focus position F
Then, delay times D _{1 to} D ₈ are given so that the ultrasonic waves emitted from the eight transducers arrive at the same time. Similarly, when it is desired to obtain the beam at the focal point F ′, delay times D _{1 to} D ₈ are given to the position F ′ so that the ultrasonic waves emitted from the eight transducers arrive at the same time. The delay time determined by this focal length is generally called a delay pattern.

FIG. 11 is a diagram showing the entire structure of the electronic scanning ultrasonic inspection apparatus, particularly the detailed internal structure of the control circuit 11. The microprocessor 13 ... Is managed as a whole, and at the same time controls the transmission delay circuit 12, the matrix circuit 50, the shift register 17, and the matrix circuit 19. Transmission delay circuit 12 ... A circuit that gives a delay time determined by a delay pattern, and includes the delay circuits 12 (1) to 12 (1) to FIG.
This corresponds to 12 (8). Although it is separated from the control circuit 11 in FIG. 10, it is handled as a part of the control circuit 11 in this example. Which delay pattern is determined by the focus position, and the microprocessor 13 sets the delay pattern by giving the focus position. Matrix circuit 50 ... This circuit 50 is a circuit including the matrix circuit 4 and the switching circuit 32 of FIG. The purpose of this circuit 50 is to select one transmission ultrasonic beam from the 121 transmission ultrasonic beams. However, this circuit 50 uses the first beam → second beam →
The selection method of sequentially updating the numbers in the order of the beam numbers, such as the 121st beam, is adopted. The transmission ultrasonic beam selection is, as described above, at which position in the array probe 10 the eight transducers are selected as the eight transducers, and ultimately, the eight transducers selected. This is also to give the _eight delay outputs P _{1 to} P ₈ of the transmission delay circuit 12 to the oscillator.
A related embodiment of the matrix circuit 50, the delay circuit 12 and the distributor 15 is shown in FIG.

Distributor 15 ... A selection circuit for giving a delay pattern to the transducer of the array probe 10 belonging to the beam number selected by the matrix circuit 50. Specific examples are shown in FIGS. Transmitting / receiving circuit 16, shift register circuit 17 ... A circuit for actually applying an excitation voltage according to the delay pattern to the transducer belonging to the beam number selected by the matrix circuit 50 and receiving a reflected wave at that time is a transmitting / receiving circuit. Is. The shift register circuit 17 is a circuit for specifying the eight vibrators at this time. A concrete example of the circuits 16 and 17 is shown in FIG.
5 shows. The adder 18 has the same configuration as the distributor 15, except that the input of the distributor 15 is the output of the adder 18 and the output of the distributor 15 is the input of the adder 18. Matrix circuit 19 ... Has the same configuration as the matrix circuit 50, and its input and output are opposite to each other, as in the case of the adder 18. Waveform adding circuit 20 ... A circuit for totalizing the reflected signals from the eight transducers, and the added output is treated as a reflected signal from the focus.

FIG. 12 shows the matrix circuit 50 as the center.
It is an example of a circuit. The matrix circuit 50 has a length x width of 8 x
It is a matrix of size 8 and all 64 intersections are
It is tied with a switch. Do this switch
Is the switching circuit 32 of FIG.
It is the microprocessor 13 that controls the switching.
It However, the switching circuit 32 is omitted in FIG.
It Eight lines in the vertical direction are eight lines of the transmission delay circuit 12.
Delay time D₁~ D₈Delayed output P delayed by₁~ P₈ Correspondence
Connected to the output terminals A to H of the
It is connected to the eight input terminals a to h of the distributor 15. Mato
The lix circuit 14 has output terminals A to H and input terminals a to h.
With a circuit that switches the correspondence relationship of according to the selected beam number
is there. The details are as follows. First beam B₁in the case of. Terminal A (P₁) And terminal a, terminal B (P₂) And terminals b, ...,
Terminal H (P₈) And terminal h so that they are connected to each other.
Select the point switch and turn it on. Second beam B₂in the case of. Terminal A (P₁) And terminal b, terminal B (P₂) And terminals c, ...,
Terminal G (P₇) And terminal h, terminal H (P₈) And terminal a
Select the intersection switches so that they connect to each other and turn them on.
It

In the case of the third beam B ₃ . Terminal A (P ₁ ) and terminal c, terminal B (P ₂ ) and terminal d, ... Terminal F (P ₆ ) and terminal h, terminal G (P ₇ ) and terminal a, terminal H
Select the intersection switch so that (P ₈ ) and the terminal b are connected to each other, and turn on. Hereinafter, the fourth beam B ₄ , the fifth
As for the beam B ₅ , one terminal after another is connected to the terminals a to h and A to the beam B _5.
Select while changing the combination with H. In FIG.
The □ mark is the intersection switch to be turned on in the first beam B ₁ , the △ mark is an intersection switch to be turned on in the second beam B ₂ , and the ○ mark is an intersection point to be turned on in the third beam B _3. Switch, and this combination is as described above. FIG.
Shows an example of the intersection switch. The switch SW1 may be turned on for the connection Aa, and the switch SW2 may be turned on for the connection Bb.

FIG. 14 shows the configuration of the distributor 15, which defines the relationship between the input terminals a to h and the 128 transducer numbers in the combination shown in the figure. That is, for input terminal a, transducer numbers 1, 9, 17, 25, ..., 113, 121, and for input terminal b, transducer numbers 2, 10, 18, 26 ,.
2. For input terminal c, transducer numbers 3, 11, 19, 27, ..., 115, 12
3, ........................... For the input terminal h, transducer numbers 8, 16, 24, 32, ..., 120, 12
8, the input terminals a to h and the transducer numbers 1 to 128 are made to correspond to each other (connection). However, distributor 1
In 5, to the terminal a, 1,9,17, ..., the 121 sixteen transducers number has become a common connection, for example, a pulse P ₁ of the delay time D ₁ is applied, this is The 16 corresponding oscillators are simultaneously applied in common, and 16 oscillators are simultaneously excited. The same applies to the terminals b to h. A circuit for eliminating such irrational is the shift register 17 in FIG. That is, the shift register 17 is a circuit in which eight bit position outputs Q corresponding to the selected beam number are all “1”, and among the eight input terminals a to h of the distributor 15, 16 of them are provided. One
The eight bit position outputs Q (all "1") are used for selection.

A specific description will be given with reference to FIG. In FIG. 15, the shift register 17 is a shift register having a total length of 128 bits # 1 to # 128. The register 17 is preset with data that is all "1" over consecutive 8 bits. Preset positions are # 1 to #
8 position. This 8-bit all "1" data is eight transducer selection data for beam forming. This transducer selection data is controlled so as to be shifted bit by bit toward the higher bit number in accordance with the update of the beam number. That is, when it is desired to select the first beam B ₁ , the outputs Q _{1 to} Q ₁₂₈ are generated with the preset bit positions (# 1 to # 8). In this case, Q _{1 to} Q ₈ are all “1” and Q _{9 to} Q ₁₂₈ are all “0”. When it is desired to select the second beam B ₂ , the 8-bit transducer selection data is shifted to the upper position by 1 bit, and the bit position (# 2 to # 2
# 9) is all "1" and the output Q ₂ to Q ₉ are all "1", the output Q ₁₀ to Q _128, Q ₁ is all "0".
If you want to select the 3rd beam, shift 1 bit more,
Output Q ₃ to Q ₁₀ are all "1", the output Q ₁₁ to Q _128,
Q ₁ and Q ₂ are all “0”. After that, the beam numbers are sequentially shifted according to the update of the beam numbers. The shift register 17
The # 128 data is shifted by 1 bit to return to # 1 (so-called ring format).

Further, the transmission / reception circuit 16 is composed of transmission / reception circuit elements up to a number corresponding to 128 transducers 10 (1) to 10 (128). For example, the circuit element corresponding to the transducer 10 (1) is a transmission element. It comprises a device T ₁ , a receiver R ₁ , and an AND gate X ₁ . When the oscillator 10 (1) is selected, the output of the Q ₁ terminal of the shift register becomes “1” and the AND gate X ₁ is opened.
The delayed pulse at the first output terminal of the distributor 15 is passed.
This becomes a high-voltage pulse (or burst wave) via the transmitter T ₁ and excites the vibrator 10 (1). The reflected wave from the sample is detected by the transducer 10 (1) and is received by the receiver (Q ₁
It is turned on when the terminal is "1".) Received at R ₁ , adder 1
Sent to 8. The remaining 127 transmitting / receiving circuit elements have the same configuration and operation.

In this way, the eight selected transducers are excited in accordance with the delay pattern so as to become the specified focus, and these reflected signals are summed up to form one reflected signal. It is used as a target for processing and analysis. In the case of selection, the switching circuit 32 of the matrix circuit 50
3 may be controlled by the microprocessor 13 as shown in FIG. Although an example in which the transmission oscillator and the reception oscillator are matched is shown, there may be a mismatched combination.

[0033]

According to the present invention, it is possible to arbitrarily select the number of input / output line connecting lines only by adding a switching circuit composed of a printed board or the like to the matrix circuit.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a switching device of the present invention.

FIG. 2 is a diagram showing an example of 8 × 8 selection for the embodiment of FIG.

FIG. 3 is a diagram showing an example of 6 × 6 selection with respect to the embodiment of FIG.

FIG. 4 is a diagram showing an example of 2 × 2 selection with respect to the embodiment of FIG.

5 is a diagram showing various selection examples for the embodiment of FIG.

FIG. 6 is a diagram showing a selection example and a reverse selection example of FIG. 5;

FIG. 7 is another embodiment of the switching device of the present invention.

FIG. 8 is a diagram showing an example of selecting an ultrasonic beam of an ultrasonic probe.

FIG. 9 is a diagram illustrating an example of an ultrasonic beam and a focus movement of the ultrasonic probe.

FIG. 10 is a diagram showing an example of a delay pattern in the ultrasonic probe.

FIG. 11 is a configuration diagram of an ultrasonic inspection apparatus.

FIG. 12 is an embodiment diagram centering on a matrix circuit in the ultrasonic inspection apparatus.

FIG. 13 is a configuration example diagram of input / output lines and cross point switches in a matrix circuit.

FIG. 14 is a diagram illustrating an embodiment of a distribution circuit.

FIG. 15 is a diagram showing an example of a transmission / reception system of an ultrasonic probe.

FIG. 16 is a diagram showing a conventional 8 × 8 switching device.

FIG. 17 is a diagram showing a conventional 4 × 4 switching device.

FIG. 18 is a diagram showing another embodiment of the switching device of the present invention.

FIG. 19 is a diagram showing switch switching in the embodiment of FIG.

[Explanation of symbols]

4 Matrix Circuit 5 Cross Point Switch 32 Switching Circuit 32A Cross Point Switch L _{1 to} L ₁₅ Connection Line (Line) R Control Signal Line R _{1 to} R ₈ Control Signal Line R _{9 to} R ₁₅ Switching Signal Line T _{1 to} T ₈ Timing signal

Claims (4)

[Claims] 1. A plurality of input lines arranged in one direction and a plurality of output lines arranged in the other direction crossing the input lines,
A control signal line for transmitting a switching signal of the cross point switch in a matrix circuit comprising a cross point switch for connecting / disconnecting the input line and the output line at each intersection of the input line and the output line; A matrix switching device comprising control means for selectively supplying a switching signal to the control signal line so as to arbitrarily change the number of connections between the input line and the output line. 2. M input lines arranged in one direction, M output lines intersecting with the input line and arranged in the other direction, and inputs at respective intersections of the input line and the output line. In a matrix circuit composed of a cross point switch for connecting and disconnecting a line and an output line, the cross point switch train is simultaneously driven in each diagonal direction, and is provided for each switch train (2M-1)
Switch connection lines, (2M-1) control signal lines connected to the switch connection lines, and (M-) of the (2M-1) control signal lines from the end to the center. 1) (M-1) switching signal lines connected to the control signal lines, the (2M-1) control signal lines and the (M-)
1) The connection / disconnection switch installed at the connection / disconnection point with the number of switching signal lines and the number of input / output line connections to be selected N (1 ≦ N ≦
M) means for generating a timing signal, a means for turning on / off a connection / disconnection switch corresponding to the number N of connections, and the timing signal from the end of the (2M-1) control signal lines. A matrix switching device comprising: means for selectively applying to M control signal lines extending to the center; 3. M input lines arranged in one direction, and M output lines arranged in the other direction crossing the input lines.
In a matrix circuit including a crosspoint switch that connects and disconnects the input line and the output line at each intersection of the input line and the output line, a switch array that simultaneously drives the crosspoint switch array in each diagonal direction. Provided for each (2M-
1) switch connection lines and (2M-1) control signal lines connected to the (2M-1) switch connection lines,
Among the (2M-1) control signal lines, M control signal lines from the end to the center and (M-1) control signal lines from immediately after the center to the other end are selected. With the number of connection N, which is the number of pinholes provided on (2M-1) control signal lines that can be connected by jumper wires under the correspondence relationship determined by the number of input / output line connections N (1 ≦ N ≦ M) Means for generating a fixed timing signal and the timing signal
M-1) M from the end to the center of the control signals
A matrix switching device comprising: means for selectively applying to each control signal line; 4. The matrix switching device according to claim 1, wherein the matrix circuit is a matrix circuit used when transmitting and receiving an ultrasonic beam in an ultrasonic inspection apparatus.