CN216900746U - Multichannel nerve signal simulation tester - Google Patents
Multichannel nerve signal simulation tester Download PDFInfo
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- CN216900746U CN216900746U CN202123216896.1U CN202123216896U CN216900746U CN 216900746 U CN216900746 U CN 216900746U CN 202123216896 U CN202123216896 U CN 202123216896U CN 216900746 U CN216900746 U CN 216900746U
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Abstract
The utility model provides a multi-channel nerve signal simulation tester, which comprises: the interface component comprises an SMA interface, an audio signal interface and a multi-channel brain electrode interface, and the SMA interface and the audio signal interface are electrically connected with the signal attenuator; the selector assembly comprises an input source selector, an input impedance selector and a reference source selector, wherein the input source selector is electrically connected with the signal attenuator, the input impedance selector and the reference source selector; and the dial switch is electrically connected with the input impedance selector, the reference source selector and the multichannel electroencephalogram interface. The utility model is convenient for the experimenter to check the equipment problems in the experimental process and improves the experimental efficiency.
Description
Technical Field
The utility model belongs to the technical field of simulation test equipment, and particularly relates to a multichannel nerve signal simulation tester.
Background
The research of the brain electrical signals is always a great hot point in the brain science community, and the invasive brain electrode recording is also a main mode for researching the rodent brain electrical signals. In the experimental process, experimenters need to make extremely fine and light brain electrode probes, implant the probes into the brains of mice, and collect the brain electrical signals of the mice by brain electrical signal recording equipment for analysis and research.
In the prior art, the condition that the quality of signals of electroencephalogram signal recording equipment is suddenly reduced or even signals are lost often exists, and at the moment, the problem of an interface of the electroencephalogram signal recording equipment end or the problem of an interface of a brain electrode probe end needs to be solved. The interface of the two is very fine, so an instrument specially aiming at the requirement is needed to meet the troubleshooting requirement of experimenters.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a multi-channel nerve signal simulation tester which is convenient for an experimenter to check equipment problems in the experimental process and improves the experimental efficiency.
The utility model provides the following technical scheme:
the application provides a multichannel neural signal simulation tester, includes:
the interface component comprises an SMA interface, an audio signal interface and a multi-channel brain electrode interface, and the SMA interface and the audio signal interface are electrically connected with the signal attenuator;
the selector assembly comprises an input source selector, an input impedance selector and a reference source selector, wherein the input source selector is electrically connected with the signal attenuator, the input impedance selector and the reference source selector;
and the dial switch is electrically connected with the input impedance selector, the reference source selector and the multichannel electroencephalogram interface.
Preferably, the SMA interface is an SMA five-pin interface, and the audio signal interface is a 3.5mm earphone interface.
Preferably, the signal attenuator includes a resistance-capacitance circuit, the resistance-capacitance circuit includes a first resistor, a second resistor, a fifth resistor and a first capacitor, one end of the second resistor is connected to the fifth resistor, the SMA interface or the audio signal interface, the other end of the second resistor is connected to one end of the first resistor and one end of the first capacitor, the other end of the fifth resistor and the other end of the first capacitor are grounded, and the other end of the first resistor is connected to the input source selector.
Preferably, the input source selector comprises a first row of pins with a spacing of 2 x 3HDR2.54mm, probes on one side of the first row of pins are respectively connected with the signal attenuator and the reference source, and probes on the other side of the first row of pins are connected with the input impedance selector and the reference source selector after being short-circuited.
Preferably, the input impedance selector comprises a second row of pins with a spacing of 2 x 3HDR2.54mm, probes on one side of the second row of pins are connected with the input source selector after being short-circuited, the probes on the other side of the second row of pins are respectively connected with resistors, and the resistors are all connected with jumper caps and connected with the dial switch through the jumper caps.
Preferably, the reference source selector comprises a third row of pins with a spacing of 2 × 4hdr2.54mm, the probes on one side of the third row of pins are respectively connected to the multichannel electroencephalogram interface, and the probes on the other side of the third row of pins are connected to a resistor or a ground terminal.
Preferably, the dial switch adopts an 8-way single-pole double-throw switch.
Preferably, the multichannel brain electrode interface adopts a molex55909-0840 interface.
The utility model has the beneficial effects that: according to the method, the corresponding interface can be selected according to a signal source, the EEG signal is attenuated to a normal EEG signal amplitude through signal attenuation, the input source effect, the input impedance effect and the connection mode are selected through the input source selector, the input impedance selector and the reference source selector, and a ref loop or a simulation test access of the tester is freely selected through the dial switch so as to check each access fault of the EEG signal acquisition equipment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic connection diagram of the present invention;
FIG. 2 is a circuit diagram of a RC circuit of the signal attenuator of the present invention;
FIG. 3 is a schematic diagram of an input impedance selector connection of the present invention;
FIG. 4 is a schematic diagram of a reference source selector connection according to the present invention;
fig. 5 is a schematic diagram of the connection of the dip switch of the present invention.
Detailed Description
The application provides a multichannel neural signal simulation tester, includes:
as shown in fig. 1-2, the interface assembly includes an SMA interface 1, an audio signal interface 2, and a multichannel brain electrode interface 8, and the SMA interface 1 and the audio signal interface 2 are both electrically connected to a signal attenuator 3. The signal attenuator 3 is used for attenuating the signal input by the SMA interface 1 or the audio signal interface 2 to the amplitude of a normal electroencephalogram signal, and then the signal is transmitted through the input source selector 4 at the later stage. The signal attenuator 3 comprises a resistance-capacitance circuit, the resistance-capacitance circuit comprises a first resistor R1, a second resistor R2, a fifth resistor R5 and a first capacitor C1, one end of the second resistor R2 is connected with the fifth resistor R5, the SMA interface 1 or the audio signal interface 2, the other end of the second resistor R2 is connected with one ends of the first resistor R1 and the first capacitor C1, the other end of the fifth resistor R5 and the other end of the first capacitor C1 are grounded, and the other end of the first resistor R1 is connected with the input source selector 4.
The SMA interface 1 adopts an SMA five-pin interface, and the audio signal interface 2 adopts a 3.5mm earphone interface. The test signal can be input into the tester through the two interfaces, and the tester outputs the signal after configuring the signal. The multichannel electroencephalograph interface 8 employs a molex55909-0840 interface that encapsulates 80 independent pin to pin interfaces in a very small size, of which only 72 channels are used by the present tester. The multi-channel brain electrode interface 8 is connected with an electroencephalogram signal recorder with the same specification interface and used for transmitting the simulation waveform in the equipment to the electroencephalogram signal recorder. Experimenters can detect whether the EEG signal recorder has the conditions of channel damage and signal quality reduction at the PC terminal.
As shown in fig. 3-4, the selector assembly includes an input source selector 4, an input impedance selector 5, and a reference source selector 6, wherein the input source selector 4 is electrically connected to the signal attenuator 3, the input impedance selector 5, and the reference source selector 6. The input source selector 4 can selectively connect two of the input sources through jumper caps to achieve the effect of selecting the input sources. The input source selector 4 comprises a first row of pins with the spacing of 2 x 3HDR2.54mm, probes on one side of the first row of pins are respectively connected with the signal attenuator 3 and the reference source, and probes on the other side of the first row of pins are connected with the input impedance selector 5 and the reference source selector 6 after being short-circuited. The input impedance selector 5 is used for selecting input impedance and comprises a second row of pins with 2 x 3HDR2.54mm intervals, probes on one side of the second row of pins are connected with the input source selector 4 after being short-circuited and are used for bearing an emulation signal output by the input source selector 4, a user selects proper input impedance, the probes on the other side of the second row of pins are respectively connected with resistors, and the resistors are connected with jumper caps and connected with the dial switch 7 through the jumper caps. The reference source selector 6 comprises a third row of needles with the spacing of 2 x 4HDR2.54mm, probes on one side of the third row of needles are respectively connected with the multichannel electroencephalogram interface 8, and probes on the other side of the third row of needles are connected with a resistor or a grounding terminal. The method is used for selecting the connection mode of a ref network of the multi-channel electroencephalogram interface and a ground terminal network of the tester through the jumper cap so as to adapt to different grounding requirements of users.
As shown in fig. 5, the dip switch 7 is electrically connected to the input impedance selector 5, the reference source selector 6 and the multi-channel electroencephalogram interface 8. The dial switch 7 adopts an 8-way single-pole double-throw switch, so that a user can freely select to access a ref loop or a simulation test channel of the tester in a toggle mode.
As shown in fig. 1-5, the present invention is used as follows:
1) the user accesses the simulation signal into the tester through the SMA interface 1 or the audio signal interface 2. If the SMA interface 1 is adopted to input signals, a jumper wire cap representing the SMA interface 1 is inserted into the two pins to communicate a circuit; if the 3.5mm audio signal interface 2 is adopted to input signals, a jumper cap representing the 3.5mm audio signal interface 2 is inserted into the two pins to connect the circuit.
2) The user selects the input impedance of the simulation signal through the input impedance selector 5, and in the recording process of the electroencephalogram signal, the signal is often transmitted through a series of media, wherein the inevitable conductive performance is not a particularly good material, so that the condition needs to be simulated, and the value of the specific impedance is selected by an experimenter according to the self experimental conditions.
3) The user selects the reference source of the simulation signal, and similar to the input impedance, when the electrical signal flows back to the reference point, different impedances are generated due to different media in the recording process, so that experimenters are also required to flexibly select the reference source according to the experimental condition.
4) The user selects the channel that needs to carry out simulation signal output through dial switch 7, and in the use, the condition that all channels damaged in the lump often can not appear, so in the overwhelming majority, only need to carry out the emulation to one or several ways among the multichannel EEG signal can.
5) The user inserts the EEG signal record appearance into multichannel EEG electrode interface, observes the difference of the signal that the EEG signal record appearance gathered back and original signal to judge whether the interface of EEG signal record appearance end goes wrong or the interface of electrode end goes wrong, be convenient for maintain, change.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A multichannel nerve signal simulation tester is characterized in that: the method comprises the following steps:
the interface component comprises an SMA interface, an audio signal interface and a multi-channel brain electrode interface, and the SMA interface and the audio signal interface are electrically connected with the signal attenuator;
the selector assembly comprises an input source selector, an input impedance selector and a reference source selector, wherein the input source selector is electrically connected with the signal attenuator, the input impedance selector and the reference source selector;
and the dial switch is electrically connected with the input impedance selector, the reference source selector and the multichannel electroencephalogram interface.
2. The multi-channel neural signal simulation tester of claim 1, wherein: the SMA interface adopts an SMA five-pin interface, and the audio signal interface adopts a 3.5mm earphone interface.
3. The multi-channel neural signal simulation tester of claim 1, wherein: the signal attenuator comprises a resistance-capacitance circuit, the resistance-capacitance circuit comprises a first resistor, a second resistor, a fifth resistor and a first capacitor, one end of the second resistor is connected with the fifth resistor, an SMA interface or an audio signal interface, the other end of the second resistor is connected with one end of the first resistor and one end of the first capacitor, the other end of the fifth resistor and the other end of the first capacitor are grounded, and the other end of the first resistor is connected with the input source selector.
4. The multi-channel neural signal simulation tester of claim 1, wherein: the input source selector comprises a first row of pins with the spacing of 2 x 3HDR2.54mm, probes on one side of the first row of pins are respectively connected with the signal attenuator and the reference source, and probes on the other side of the first row of pins are connected with the input impedance selector and the reference source selector after being short-circuited.
5. The multi-channel neural signal simulation tester of claim 1, wherein: the input impedance selector comprises a second row of pins with 2 x 3HDR2.54mm intervals, probes on one side of the second row of pins are connected with the input source selector after being short-circuited, the probes on the other side of the second row of pins are respectively connected with resistors, and the resistors are all connected with jumper caps and connected with the dial switch through the jumper caps.
6. The multi-channel neural signal simulation tester of claim 1, wherein: the reference source selector comprises a third row of needles with the spacing of 2 x 4HDR2.54mm, probes on one side of the third row of needles are respectively connected with the multichannel electroencephalogram electrode interface, and probes on the other side of the third row of needles are connected with a resistor or a grounding terminal.
7. The multi-channel neural signal simulation tester of claim 1, wherein: the dial switch adopts an 8-way single-pole double-throw switch.
8. The multi-channel neural signal simulation tester of claim 1, wherein: the multichannel electroencephalogram electrode interface adopts a molex55909-0840 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123216896.1U CN216900746U (en) | 2021-12-20 | 2021-12-20 | Multichannel nerve signal simulation tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123216896.1U CN216900746U (en) | 2021-12-20 | 2021-12-20 | Multichannel nerve signal simulation tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216900746U true CN216900746U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123216896.1U Active CN216900746U (en) | 2021-12-20 | 2021-12-20 | Multichannel nerve signal simulation tester |
Country Status (1)
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|---|---|
| CN (1) | CN216900746U (en) |
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2021
- 2021-12-20 CN CN202123216896.1U patent/CN216900746U/en active Active
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