Tissue interface network device for magnetic resonance gradient field injection test

Abstract

The utility model provides a tissue interface network device for a magnetic resonance gradient field injection test, which comprises a plurality of test channels, and each test channel comprises a signal input port, a capacitor module connected with the signal input port, a resistor module connected with the capacitor module, a signal output port connected with the resistor module and a grounding module. Compared with the prior art that a device cannot be replaced, and a plurality of devices with different specifications are required to be manufactured to be suitable for various active implants, so that the types of the active implants suitable for the device in the prior art are limited, the capacitance value of the capacitance module in the tissue interface network device designed by the utility model is adjustable, and the structure is simple. And the resistance value of the resistor module is adjustable, so that the capacitance value of the capacitor module and the resistance value of the resistor module can be adjusted according to the types and requirements of the active implants of the detected product, the value range of the capacitor module and the value range of the resistor module are increased, and the test requirements of various types of active implants can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the magnetic resonance test technical field of active implant, especially relates to a kind of tissue interface network devices of magnetic resonance gradient field injection test. BACKGROUND

[0002] In clinic, the demand of patient to magnetic resonance examination is higher and higher, and compatible magnetic resonance scanning is the technical development trend of active implantable medical device, but detection technology is often lagging behind the development of medical device.How to ensure that the patient carrying active implant safely carries out magnetic resonance examination is the problem that needs to be solved at present.In the magnetic resonance gradient field injection test, technical specification ISO / TS10974-2018 gives the tissue interface network schematic diagram used in magnetic resonance gradient field injection test (reference ISO / TS10974-2018, Figure 34), but it does not describe the device made according to the tissue interface network schematic diagram too much.Due to the difference of the capacitance value and resistance value of the capacitor suitable for different active implants, the device made only according to the schematic diagram limits the application range of the above-mentioned tissue interface network to some extent, resulting in the type of active implant that can be measured is limited. SUMMARY

[0003] The utility model aims at providing a kind of tissue interface network devices of magnetic resonance gradient field injection test, to solve the type of active implant that the test device of tissue interface network schematic diagram made currently can be applicable is limited problem.

[0004] To solve the above technical problem, the utility model provides a kind of tissue interface network devices of magnetic resonance gradient field injection test, it includes:

[0005] The tissue interface network device includes test channel, and the test channel includes;

[0006] Signal input port, for accessing signal source;

[0007] Capacitor module connected with the signal input port;

[0008] Resistance module connected with the capacitor module;

[0009] Signal output port connected with the resistance module, and the signal output port is used to connect the first end of measured product;

[0010] Ground module, for connecting the second end of the measured product;

[0011] Among them, the capacitance value of the capacitor module is adjustable, and the resistance value of the resistance module is adjustable.

[0012] Optionally, the capacitance module is a digital controlled capacitor, and the resistance module is a digital controlled resistor.

[0013] Optionally, the number of test channels is multiple, and all the test channels have a common grounding module.

[0014] Optionally, the capacitance module comprises a plurality of parallel capacitance branches, and each capacitance branch comprises a capacitor and a first transistor connected in series.

[0015] Optionally, the capacitance module further comprises a second transistor connected in parallel with the capacitance branch.

[0016] Optionally, the resistance module comprises a first resistor, a second resistor, and a switching unit, the switching unit adjusts the first resistor to be connected between the capacitance module and the signal output port, or adjusts the first resistor and the second resistor to be connected in series between the capacitance module and the signal output port.

[0017] Optionally, the first resistor is an adjustable resistor, and the second resistor is an adjustable resistor, and the resistance of the second resistor is greater than the resistance of the first resistor.

[0018] Optionally, the switching unit comprises a third transistor, a first end of the second resistor is connected to the capacitance module through the first resistor, a second end of the second resistor is connected to the signal output port, and the third transistor is connected in parallel with the second resistor.

[0019] Optionally, the grounding module comprises a grounding port and a grounding resistance unit, and the grounding port is grounded through the grounding resistance unit.

[0020] Optionally, the resistance of the grounding resistance unit is adjustable.

[0021] Optionally, the tissue interface network device further comprises a housing, the resistance module, the capacitance module, and the grounding resistance unit are arranged inside the housing, and the signal input port, the signal output port, and the grounding port are arranged on the surface of the housing.

[0022] Optionally, the test channel further comprises a resistance switch, one end of the resistance switch is connected to the signal source, and the other end of the resistance switch is connected to or disconnected from between the signal input port and the capacitance module; the resistance switch is arranged on the surface of the housing.

[0023] Optionally, the tissue interface network device comprises a key module and a display screen, the key module is used for adjusting the capacitance value of the capacitance module, the resistance value range of the resistance module and the resistance value range of the grounding resistance unit, and the display screen is used for displaying the capacitance value of the capacitance module and the resistance value of the resistance module; the key module and the display screen are arranged on the surface of the shell.

[0024] Optionally, the signal input ports of all the test channels are arranged in sequence on the surface of the shell.

[0025] Optionally, the signal output ports of all the test channels are arranged in sequence on the surface of the shell.

[0026] Optionally, the resistance switches of all the test channels are arranged in sequence on the surface of the shell.

[0027] Optionally, the tissue interface network device further comprises a knob module, the knob module selects the resistance value of the resistance module and the resistance value of the grounding resistance unit of the corresponding test channel; the knob module is arranged on the surface of the shell.

[0028] Optionally, the knob module comprises a first knob, a second knob, a third knob and a fourth knob, the first knob and the second knob cooperate to adjust the resistance value of the resistance module, and the third knob and the fourth knob cooperate to adjust the resistance value of the grounding resistance unit.

[0029] Optionally, the tissue interface network device further comprises a knob structure, the knob structure is used for selecting the test channel; the knob structure is arranged on the surface of the shell.

[0030] Optionally, the tissue interface network device has a first signal detection port and a second signal detection port, the first signal detection port and the second signal detection port are used for accessing an oscilloscope.

[0031] The tissue interface network device comprises a first switch, a first single-pole switch, a second single-pole switch and a third single-pole switch, the knob structure drives the first switch to switch the contact between the capacitance module of the selected test channel and the signal input port to access the first signal detection port, drives the second single-pole switch to access the contact between the capacitance module and the resistance module of the selected test channel, and drives the third single-pole switch to access the contact between the resistance module and the signal output port; the first single-pole switch accesses one of the second single-pole switch and the third single-pole switch to the second signal detection port.

[0032] The tissue interface network device of the magnetic resonance gradient field injection test as above is irreplaceable compared with the tissue interface network device in the prior art, and often needs to be made into multiple different specifications to be applicable to various active implants, so that the type of the active implant applicable to the device in the prior art is limited, the capacitance value of the capacitance module in the tissue interface network device designed by the utility model is adjustable, and the resistance value of the resistance module is adjustable, the capacitance value of the capacitance module and the resistance value of the resistance module can be adjusted according to the type and demand of the active implant of the detected product, the value range of the capacitance module and the value range of the resistance module are increased, and the test demand of various types of active implants can be met. BRIEF DESCRIPTION OF DRAWINGS

[0033] Those skilled in the art should understand that the drawings provided are used to better understand the utility model, and do not constitute any limitation on the scope of the utility model. Among them:

[0034] Figure 1 is a schematic diagram of a tissue interface network device of an embodiment of the utility model;

[0035] Figure 2 is a schematic diagram of a capacitance module of an embodiment of the utility model;

[0036] Figure 3 is a schematic diagram of a resistance module of an embodiment of the utility model;

[0037] Figure 4 is a schematic diagram of a grounding resistance unit of an embodiment of the utility model;

[0038] Figure 5 is a schematic diagram of a shell of an embodiment of the utility model;

[0039] Figure 6 is a top view of a shell of an embodiment of the utility model;

[0040] Figure 7 is a rear view of a shell of an embodiment of the utility model. DETAILED DESCRIPTION

[0041] In order to make the purpose, advantages and characteristics of the utility model more clear, the utility model is further described in detail below in combination with the drawings and specific embodiments. It should be noted that the drawings are very simplified and are not drawn according to scale, and are only used to facilitate and clearly assist the purpose of explaining the embodiment of the utility model. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0042] As used in the present application, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. The term "or" is generally employed in its sense of "and / or" unless the context clearly dictates otherwise. The term "plurality" is generally employed in its sense of "at least one" unless the context clearly dictates otherwise. The term "at least two" is generally employed in its sense of "two or more" unless the context clearly dictates otherwise. In addition, the terms "first," "second," "third," etc. are used only to describe a particular object and do not imply or suggest a relative importance or an implicit indication of the number of the indicated technical features. Thus, features qualified with "first," "second," "third," etc. can explicitly or implicitly include one or at least two of the features. The terms "one end" and "the other end" and "proximal end" and "distal end" generally refer to two corresponding parts, which not only include the end points, but also the terms "mounting," "connecting," and "connection" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship between two elements. In addition, as used in the present application, a component disposed in another component generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two components, and the two components can be directly connected, coupled, cooperated or transmitted, or indirectly connected, coupled, cooperated or transmitted through an intermediate component, and cannot be understood as indicating or suggesting the spatial positional relationship between the two components, i.e. one component can be in any orientation inside, outside, above, below or one side of another component, unless the context clearly indicates otherwise. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0043] Figure 1 is a schematic view of an organization interface network device according to an embodiment of the present application. Referring to Figure 1 , the present application provides an organization interface network device for performing magnetic resonance gradient field injection testing on active implants, the device comprising a plurality of test channels, such as Figure 1The 9-way test channel is demonstrated. The test channel comprises a signal input port C, a capacitor module 10, a resistor module 20, a signal output port F and a grounding module. The signal input port C is connected to a signal source to obtain a voltage signal. One end of the capacitor module 10 is connected to the signal input port C, and the other end of the capacitor module 10 is connected to one end of the resistor module 20. The other end of the resistor module 20 is connected to the signal output port F. The signal output port F is connected to a first end of a product to be tested (i.e. an active implant). The grounding module is connected to a second end of the product to be tested. In this embodiment, the grounding module comprises a grounding port J and a grounding resistor unit 30. The grounding port J is connected to the second end of the product to be tested. The grounding port J is grounded through the grounding resistor unit 30. Of course, the grounding port J itself can also be grounded. In this way, a loop is formed by the test channel and the product to be tested. The voltage signal is injected into the product to be tested to realize the magnetic resonance gradient field injection test of the product to be tested. Preferably, all the test channels have a common grounding module. The resistance value of the grounding resistor unit 30 in the grounding module is adjustable. The type of the signal input port C is, for example, a BNC interface.

[0044] Preferably, the capacitance value of the capacitor module 10 is adjustable. For example, the capacitor module 10 is a digital controlled capacitor. In other embodiments, the capacitor module 10 can also be a plug-in capacitor (a plug-in capacitor). The resistance value of the resistor module 20 is adjustable. For example, the resistor module 20 is a digital controlled resistor. In other embodiments, the resistor module 20 can also be a plug-in resistor. In this way, compared with the tissue interface network device in the prior art which is not replaceable, it is often necessary to manufacture a plurality of devices of different specifications to adapt to various active implants, resulting in that the type of the active implant that can be adapted by the device in the prior art is limited. The capacitance value of the capacitor module 10 in the tissue interface network device designed by the utility model is adjustable, and the resistance value of the resistor module 20 and the grounding resistor unit 30 is adjustable. The capacitance value of the capacitor module 10, the resistance value of the resistor module 20 and the grounding resistor unit 30 can be adjusted according to the type and requirements of the active implant of the product to be tested. The value range of the capacitor module 10 is increased, and the value range of the resistor module 20 and the grounding resistor module 30 can meet the test requirements of various types of active implants.

[0045] Figure 2 is a schematic view of the capacitor module of an embodiment of the utility model. Referring to Figure 2The capacitor module 10 comprises a plurality of parallel capacitor branches, each capacitor branch comprising a capacitor Cx and a first transistor Q1 connected in series, wherein the capacitor Cx in each capacitor branch can be different. In this way, by controlling the switching state of the first transistor Q1 in each capacitor branch, the capacitor Cx in the capacitor branch can be connected in the circuit or not, thereby changing the capacitance of the capacitor module 10. When the first transistor Q1 is turned on, the capacitor Cx in the capacitor branch is connected in the circuit, thereby changing the capacitance of the capacitor module 10. For example, the first transistor Q1 can be an NMOS transistor, and a control signal is sent to the gate of the NMOS transistor to control the switching state of the first transistor Q1.

[0046] In an embodiment, the switching state of the first transistor in each capacitor branch can be controlled based on a binary digital signal, thereby controlling the resistance of the capacitor module, and the binary signal also reflects the capacitance of the capacitor module 10. For example, the number of capacitor branches of the capacitor module 10 is seven, the capacitances of the capacitors Cx in each capacitor branch are different, and the capacitance of the smallest capacitor Cx is C1, and the capacitances of the remaining capacitors Cx are 2 n C1 (n is an integer from 1 to 6). For example, the input binary signal is 1100011, and the capacitance of the capacitor module 10 is (2 6 +2 5 +2+1)C1=99C1.

[0047] Preferably, the capacitor module 10 further comprises a second transistor Q2 connected in parallel with each capacitor branch. When the second transistor Q2 is turned on, each capacitor branch in the path can be short-circuited, thereby adjusting the capacitance of the capacitor module 10 to 0. When the capacitance of the capacitor module 10 is 0, the capacitor module 10 is equivalent to a wire connected between the signal input end and the resistance module 20, which is convenient for subsequent detection of the voltage on the resistance module 20. For example, the second transistor Q2 can be an NMOS transistor, and a control signal is sent to the gate of the NMOS transistor to control the switching state of the second transistor Q2.

[0048] Figure 3 is a schematic diagram of the resistance module of an embodiment of the utility model. Referring to Figure 3The resistor module 20 includes a first resistor R1, a second resistor R2, and a switching unit 210. The switching unit 210 adjusts the connection of the first resistor R1 between the capacitor module 10 and the signal output port F, or adjusts the connection of the first resistor R1 and the second resistor R2 in series between the capacitor module 10 and the signal output port F. By configuring the switching unit 210 to adjust the connection relationship of the first resistor R1 and the second resistor R2, the resistance range of the resistor module 20 is adjusted, making the resistance value of the resistor module 20 equal to the resistance value of the first resistor R1, or the sum of the resistance values ​​of the first resistor R1 and the second resistor R2. Preferably, both the first resistor R1 and the second resistor R2 are adjustable resistors, further increasing the value range of the resistor module 20. For example, the resistance range of the first resistor R1 is 0-500Ω, and the resistance range of the second resistor R2 is 500-4500Ω.

[0049] Furthermore, the network interface device also includes a knob module, which selects the resistance value of the resistor module and the grounding resistance module unit corresponding to the test channel. In one embodiment, the knob module includes a first knob A and a second knob B, whereby the first knob A is used to adjust the resistance value of the first resistor R1, and the second knob B is used to adjust the resistance value of the second resistor R2. For example, corresponding to... Figure 1 The test channel has nine knobs. The first knob A has nine knobs, A1 to A9, which are used to adjust the resistance value of the first resistor R1 in the corresponding test channel. The second knob has nine knobs, B1 to B9, which are used to adjust the resistance value of the second resistor R2 in the corresponding test channel.

[0050] Continue reading Figure 3 The switching unit 210 includes a third transistor Q3. The first end of the second resistor R2 is connected to the capacitor module 10 through a first resistor R1. The second end of the second resistor R2 is connected to the signal output port F. The third transistor Q3 is connected in parallel with the second resistor R2, that is, the first end of the third transistor Q3 is connected to the first end of the second resistor R2, and the second end of the third transistor Q3 is connected to the second end of the second resistor R2. A control signal is received at the control terminal of the third transistor Q3 to control the on / off state of the third transistor Q3. Thus, by controlling the third transistor Q3 to be on or off, the connection relationship between the first resistor R1 and the second resistor R2 can be adjusted. When the third transistor Q3 is off, the first resistor R1 and the second resistor R2 are connected in series between the capacitor module 10 and the signal output port F. When the third transistor Q3 is on, the second resistor R2 is short-circuited, and the first resistor R1 is connected between the capacitor module 10 and the signal output port F. For example, the third transistor Q3 can be an NMOS transistor.

[0051] It should be noted that, regarding the structure of the grounding resistor unit 30, this embodiment can be configured to have the same or similar structure as the resistor module 20. For example, refer to... Figure 4The grounding resistor unit includes a third resistor R3, a fourth resistor R4, and a fourth transistor Q4. It should be noted that the second terminal of both the fourth resistor R4 and the fourth transistor Q4 are grounded. For details regarding the first resistor R1, the second resistor R2, the third transistor Q3, and the fourth transistor Q4 in resistor module 20, please refer to the previous explanation to understand the working principle of the grounding resistor unit 30; further details will not be provided here.

[0052] Furthermore, the knob module includes a third knob K and a fourth knob L. The third knob K is used to adjust the resistance value of the third resistor R3, and the fourth knob L is used to adjust the resistance value of the fourth resistor R4.

[0053] Furthermore, the network interface device also includes a button module 50 and a display screen 60. The button module 50 is used to adjust the capacitance value of the capacitor module 10, the resistance range of the resistor module 20, and the resistance range of the grounding resistor unit 30. The display screen 60 is used to display the capacitance value of the capacitor module 10 and the resistance value of the resistor module 20, and to monitor the capacitance value and resistance range of the capacitor module and resistor module in real time. Regarding the method of adjusting the capacitance value of the capacitor module 10 using the button module 50, for example, it can correspond to the binary signal control of the capacitor module's capacitance value described above. By selecting the corresponding capacitance value through the button module 50, the internal binary signal is converted and input, thereby changing the capacitance value of the capacitor module 10.

[0054] For example, by using a computer to write a communication protocol to the microprocessor, the button module 50 can control various control signals (high and low levels) output by the microprocessor via the CAN bus. This controls the switching state of the first transistor Q1 and the second transistor Q2 in each capacitor module 10, thereby adjusting the resistance value of the capacitor module 10. It also controls the switching state of the third transistor Q3 in each resistor module 20, thereby adjusting the resistance range of the resistor module 20. Finally, it controls the switching state of the fourth transistor Q4 in the grounding resistor unit 30, thereby adjusting the resistance range of the grounding resistor unit 30. The microprocessor can be, for example, an STM32F103C8T6 microprocessor. The button module 50 and the display screen 60 can be integrated into one device, such as a TFTLCD1602 liquid crystal display with buttons. The capacitance value of the capacitor module 10 can be directly selected on the TFTLCD1602 liquid crystal display with buttons, while the specific value is monitored in real time. This improves testing efficiency while ensuring the stability and reliability of the test.

[0055] Regarding the specific method of adjusting the resistance value of the resistor module 20, a corresponding signal can be input to the resistor module 20 via the button module 50 to control the switching unit 210 (i.e., the switching state of the third transistor Q3) inside it, thereby achieving a wide range of adjustment of the resistance value of the resistor module 20. For precise control of the resistance value of the resistor module 20, based on the real-time resistance reading on the display screen 60, the first resistor R1 is adjusted using the first knob A, and the second resistor R2 is adjusted using the second knob B, thereby precisely adjusting the resistance value of the resistor module 20. In one embodiment, an ohmmeter 80 is provided, with its two ends connected to the two ends of the resistor module 20, used to read the resistance value of the resistor module 20 and send it to the display screen 60. The communication method could be, for example, CAN communication. The resistance adjustment of the grounding resistor unit 30 is similar to that of the resistance module 20, and will not be repeated here. It should be noted that in practice, the grounding resistor unit 30 is not connected to the ohmmeter 80, so the resistance value of the grounding resistor unit 30 cannot be displayed on the display screen 60, which is not conducive to the precise adjustment of the resistance value of the grounding resistor unit 30. Therefore, a multimeter (not shown) can be added. The two ends of the multimeter are connected to the two ends of the grounding resistor unit 30 respectively, so as to display the resistance value of the grounding resistor unit 30 in real time, and use the third knob L and the fourth knob L to make precise adjustment of the resistance value of the grounding resistor unit 30.

[0056] Furthermore, the network interface device also includes a knob structure 70 for selecting a test channel. The knob structure 70 is used to select the test channel required for the active implant. Further, after selecting the corresponding test channel, the knob structure 70 also controls a ohmmeter 80 to connect to both ends of the resistance module 20 of the selected test channel, enabling the reading and transmission of the resistance value data of the selected resistance module 20 to the display screen 60. This eliminates the need to configure a ohmmeter 80 for each test channel, saving design costs. After the knob structure 70 selects the corresponding test channel, the ohmmeter 80 can read the resistance value of the resistance module 20 of that test channel.

[0057] Further reading Figure 1The organizational interface network device has a first signal detection port D1 and a second signal detection port D2. The first signal detection port D1 and the second signal detection port D2 are used to connect to an oscilloscope (specifically, via a differential amplifier). The type of the first signal detection port D1 and the second signal detection port D2 is, for example, a BNC interface. The organizational interface network device includes a first switching switch S1 and a second switching switch S2. The second switching switch includes a first single-pole switch S21, a second single-pole switch S22, and a third single-pole switch S23. A knob structure 70 drives the first switching switch S1 to switch the contact between the capacitor module 10 and the signal input port C of the selected test channel to the first signal detection port D1 or leave it floating. The knob structure 70 also drives the second single-pole switch S22 to connect to the contact between the capacitor module 10 and the resistor module 20 of the selected test channel, and the knob structure 70 drives the third single-pole switch S23 to connect to the contact between the selected resistor module 20 and the signal output port F. The first single-pole switch S21 connects one of the second single-pole switches S22 and the third single-pole switch S23 to the second signal detection port D2. Thus, after selecting the corresponding test channel via the knob structure 70, the first switching switch S1 connects the contact between the capacitor module 10 and the signal input port C of that test channel to the first signal detection port D1, the second single-pole switch S22 connects to the contact between the capacitor module 10 and the resistor module 20, and the third single-pole switch S23 connects to the contact between the capacitor module 10 and the signal output port F. When the first single-pole switch S21 is connected to the second single-pole switch S22, the second single-pole switch S22 can be connected to the second signal detection port D2. With the cooperation of the first switching switch S1, the second single-pole switch S22, and the first single-pole switch S21, the two ends of the capacitor module 10 can be connected to the first signal detection port D1 and the second signal detection port D2 respectively, thereby detecting the voltage on the capacitor module 10 and displaying it on an oscilloscope. When the capacitance of the control capacitor module 10 is zero, the capacitor module 10 is equivalent to a wire. At this time, the control first single-pole switch S21 is connected to the third single-pole switch S23. With the cooperation of the first switching switch S1, the third single-pole switch S23 and the first single-pole switch S21, the two ends of the resistor module 20 can be connected to the first signal detection port D1 and the second signal detection port D2 respectively, so as to detect the voltage on the resistor module 20 and display it through an oscilloscope.

[0058] Furthermore, after the knob structure 70 selects the corresponding test channel, it also controls the ohmmeter 80 to be connected to both ends of the resistance module 20 of the selected test channel. In one embodiment, the two ends of the ohmmeter 80 are respectively connected to the second single-pole switch S22 and the third single-pole switch S23. After the knob structure 70 selects the corresponding test channel and the second single-pole switch S22 and the third single-pole switch S23 are respectively connected to both ends of the resistance module 20 of the test channel, the ohmmeter 80 can be connected to both ends of the corresponding resistance module 20 through the second single-pole switch S22 and the third single-pole switch S23, thereby realizing the reading of the resistance value data of the resistance module 20.

[0059] Preferably, the test channel further includes a resistor switch Rx, one end of which is connected to a signal source, and the other end of which is connected or disconnected between the signal input port C and the capacitor module 10. As those skilled in the art will understand, the resistor switch Rx integrates a resistor and a switch. The state of the switch controls whether the internal resistor is connected to the corresponding circuit. In this invention, if the voltage required by the product under test is too high, connecting the resistor switch Rx (i.e., connecting the internal resistor of the resistor switch Rx between the signal input port C and the corresponding resistor module 20) will result in insufficient driving capability of the signal source, thus failing to reach the required injection voltage level of the product under test. In this case, disconnecting the resistor switch Rx and using a high-impedance signal source can reduce the load effect on the signal source. By adding the resistor switch Rx, the applicability of the device can be further expanded.

[0060] Figure 5 This is a schematic diagram of the housing of an organizational interface network device according to an embodiment of the present invention. See also... Figure 5 The resistance interface network device also includes a housing 40. The resistor module 20, capacitor module 10, and grounding resistor unit 30 are all housed inside the housing 40. The signal input port C, signal output port F, and grounding port J are located on the surface of the housing 40. The housing 40 is preferably made of metal, which serves to dissipate heat and shield interference, thus improving testing efficiency.

[0061] Furthermore, resistance switches Rx are disposed on the surface of housing 40. The resistance switches Rx for all test channels are arranged sequentially on the surface of housing 40. For example, Figure 5 The top row on the front of the middle housing 40 includes the resistance switches Rx for all test channels. Among them, the leftmost one in the top row is the first single-pole switch S21.

[0062] Furthermore, the signal input ports C of all test channels are arranged sequentially on the surface of the housing 40. For example, Figure 5The next row on the front of the middle housing 40 includes the signal input ports C for all test channels. The two leftmost ports in the next row are the first signal detection port D1 and the second signal detection port D2, respectively.

[0063] Figure 6 This is a top view of the housing according to an embodiment of the present invention. Figure 7 This is a rear view of the housing according to an embodiment of the present invention. (See also...) Figure 6 and Figure 7 The signal output port F can be located on the back of the housing 40 (opposite to the side where the signal input port C is located). Furthermore, the signal output ports F of all test channels are arranged sequentially on the surface of the housing 40, for example, Figure 6 and Figure 7 In this configuration, all signal output ports F are located on the back of housing 40. First knob A is located on the surface of housing 40; for example, all first knobs A are arranged side-by-side on the back of housing 40. Second knob B is located on the surface of housing 40; for example, all second knobs B are arranged side-by-side on the back of housing 40. Third knob K and fourth knob L are also located on the back of housing 40.

[0064] See Figures 5 to 7 The button module 50 and the display screen 60 are disposed on the surface of the housing 40, for example, on the top surface of the housing 40, and the knob structure 70 is disposed on the surface of the housing 40, for example, on the side surface of the housing 40.

[0065] Although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A magnetic resonance gradient field injection test tissue interface network device, characterized by, The tissue interface network device comprises a test channel, the test channel comprises: a signal input port for accessing a signal source; a capacitance module connected with the signal input port; a resistance module connected with the capacitance module; a signal output port connected with the resistance module, the signal output port is used for connecting a first end of a product under test; a grounding module for connecting a second end of the product under test; wherein the capacitance value of the capacitance module is adjustable, and the resistance value of the resistance module is adjustable.

2. The magnetic resonance gradient field infusion testing tissue interface network apparatus of claim 1, wherein, The capacitance module comprises a plurality of parallel capacitance branches, and each capacitance branch comprises a capacitor and a first transistor connected in series.

3. The magnetic resonance gradient field infusion testing tissue interface network apparatus of claim 2, wherein, The capacitance module further comprises a second transistor connected in parallel with the capacitance branch.

4. The magnetic resonance gradient field infusion testing tissue interface network apparatus of claim 1, wherein, The resistance module comprises a first resistance, a second resistance and a switching unit, the switching unit adjusts the first resistance to be connected between the capacitance module and the signal output port, or adjusts the first resistance and the second resistance to be connected in series between the capacitance module and the signal output port.

5. The magnetic resonance gradient field infusion test tissue interface network apparatus of claim 4, wherein, The first resistance and the second resistance are both adjustable resistances, and the resistance value of the second resistance is greater than the resistance value of the first resistance.

6. The magnetic resonance gradient field infusion test tissue interface network apparatus of claim 4, wherein, The switching unit comprises a third transistor, a first end of the second resistance is connected to the capacitance module through the first resistance, a second end of the second resistance is connected to the signal output port, and the third transistor is connected in parallel with the second resistance.

7. The magnetic resonance gradient field infusion testing tissue interface network apparatus of claim 1, wherein, The grounding module comprises a grounding port and a grounding resistance unit, the grounding port is grounded through the grounding resistance unit; the resistance value of the grounding resistance unit is adjustable; The tissue interface network device further comprises a housing, the resistance module, the capacitance module and the grounding resistance unit are arranged inside the housing, and the signal input port, the signal output port and the grounding port are arranged on the surface of the housing.

8. The magnetic resonance gradient field infusion test tissue interface network device of claim 7, wherein, The test channel further comprises a resistance switch, one end of the resistance switch is connected to the signal source, and the other end of the resistance switch is connected to or disconnected between the signal input port and the capacitance module; the resistance switch is arranged on the surface of the housing; And / or, the tissue interface network device comprises a key module and a display screen, the key module is used for adjusting the capacitance value of the capacitance module and the resistance value range of the resistance module, and the display screen is used for displaying the capacitance value of the capacitance module and the resistance value of the resistance module; the key module and the display screen are arranged on the surface of the housing.

9. The magnetic resonance gradient field infusion testing tissue interface network apparatus of claim 8, wherein, The number of the test channels is multiple; All the test channels have a common grounding module; And / or, the signal input ports of all the test channels are arranged in sequence on the surface of the housing; And / or, the signal output ports of all the test channels are arranged in sequence on the surface of the housing; And / or, the resistance switches of all the test channels are arranged in sequence on the surface of the housing. And / or, the tissue interface network device further comprises a knob module, the knob module selects the resistance value of the resistance module and the resistance value of the grounding resistance unit of the corresponding test channel; the knob module is arranged on the surface of the housing.

10. The magnetic resonance gradient field infusion testing tissue interface network apparatus of claim 1, wherein, The number of the test channels is multiple; the tissue interface network device has a first signal detection port and a second signal detection port, and the first signal detection port and the second signal detection port are used to access an oscilloscope; The tissue interface network device comprises a knob structure, a first switch, a first single-pole switch, a second single-pole switch and a third single-pole switch, and the knob structure is used to select the test channel; The knob structure drives the first switch to switch the contact between the selected test channel and the signal input port to access the first signal detection port, drives the second single-pole switch to access the contact between the selected test channel and the resistance module, and drives the third single-pole switch to access the contact between the selected resistance module and the signal output port; and the first single-pole switch accesses one of the second single-pole switch and the third single-pole switch to the second signal detection port.

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