CN211299917U - Signal generator - Google Patents
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- CN211299917U CN211299917U CN201921102349.0U CN201921102349U CN211299917U CN 211299917 U CN211299917 U CN 211299917U CN 201921102349 U CN201921102349 U CN 201921102349U CN 211299917 U CN211299917 U CN 211299917U
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Abstract
The embodiment of the utility model provides a signal generator. The signal generator comprises an input circuit, a main control circuit, a regulating circuit, a digital-to-analog conversion circuit and an output circuit. The first input end of the main control circuit is electrically connected with the output end of the input circuit, and the pre-calibrated actual measurement physiological information is acquired from the external memory through the input circuit. The input end of the regulating circuit is electrically connected with the first output end of the main control circuit, receives the actually measured physiological information output by the main control circuit, amplifies the actually measured physiological information and generates the amplified actually measured physiological information. The first input end of the digital-to-analog conversion circuit is electrically connected with the output end of the regulating circuit and is used for receiving the amplified actual measurement physiological information, performing digital-to-analog conversion on the actual measurement physiological information and generating an analog waveform corresponding to the actual measurement physiological information. The first input end of the output circuit is electrically connected with the output end of the digital-to-analog conversion circuit and is used for receiving and outputting an analog waveform corresponding to the actually measured physiological information.
Description
Technical Field
The utility model relates to a lead sleep monitoring technical field more, especially relate to a signal generator for testing lead sleep monitoring system more.
Background
Polysomnography (PSG) is currently the most common sleep monitoring means, is the most important examination for the diagnosis of snoring, and is an internationally accepted standard for the diagnosis of sleep apnea hypopnea syndrome. The signals monitored by the current regular PSG include physiological signals of more than 10 channels such as electrocardiogram, electromyogram, ophthalmogram, chest and abdominal respiratory tension chart, nasal and oral ventilation volume, posture signals and blood oxygen saturation besides electroencephalogram, and sleep apnea is measured by using the PSG system.
At present, in the early development stage of detection equipment for diseases related to sleep disordered breathing, physiological signals related to sleep apnea need a large amount of data simulation and verification, if good tools for aided development are not available, the development period can be greatly prolonged, the detection accuracy cannot be guaranteed, and the detection equipment is unfavorable for the market occupation of the industry of the whole product. However, no corresponding simulator is used for generating simulation respiratory effort signals, electroencephalogram signals, electromyogram signals, eye movement signals, chest type and abdominal type respiration, nasal and oral ventilation flow and other related signals in the early development stage at present, a common signal generator is basically used for replacing the simulation respiratory effort signals, the electroencephalogram signals, the electromyogram signals, the eye movement signals, the chest type and abdominal type respiration, the nasal and oral ventilation flow and other related signals, and the simulation respiratory effort signals are directly connected to a human body for accuracy verification.
However, the sine wave or the square wave output by the common signal generator is not necessarily suitable for the target physiological signal, and when the signal generator is directly connected to a human body to obtain a test signal, the test signal is unstable, and the accuracy of the detection device cannot be verified.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above problems, the utility model provides a signal generator to solve because of adopting ordinary signal generator directly to link on the human body in the development process of the check out test set of the relevant disease of sleep respiratory disorder, and the test signal that leads to gathering is unstable and can't utilize the test signal to verify the problem of check out test set's the degree of accuracy.
The utility model provides a signal generator, include:
an input circuit;
the first input end of the main control circuit is electrically connected with the output end of the input circuit, and pre-calibrated actual measurement physiological information is acquired from an external memory through the input circuit, wherein the actual measurement physiological information comprises chest type respiration signals, abdominal type respiration signals, nasal pressure signals, mouth and nose airflow signals, electroencephalogram signals, eye movement signals, lower jaw electromyogram signals, electrocardiosignals, leg muscle electric signals, blood oxygen pulse signals, snore signals and body position signals;
the input end of the adjusting circuit is electrically connected with the first output end of the main control circuit, receives the actually measured physiological information output by the main control circuit, amplifies the actually measured physiological information and generates the amplified actually measured physiological information;
a digital-to-analog conversion circuit, a first input end of which is electrically connected with an output end of the regulating circuit, and is used for receiving the amplified actual measurement physiological information, performing digital-to-analog conversion on the amplified actual measurement physiological information, and generating an analog waveform corresponding to the actual measurement physiological information; and
and a first input end of the output circuit is electrically connected with an output end of the digital-to-analog conversion circuit, and the output circuit is used for receiving and outputting an analog waveform corresponding to the actually measured physiological information.
In one embodiment, the input circuit comprises at least one input interface, and the master control circuit is electrically connected with the external memory through the input interface.
In one embodiment, the input interface is an SD card interface or a USB interface.
In one embodiment, the output circuit includes a plurality of output interface circuits, the output interface circuits are respectively electrically connected to the output terminals of the digital-to-analog conversion circuits, and each of the output interface circuits outputs one of the measured physiological information.
In one embodiment, each of the output interface circuits includes at least two output interfaces.
In one embodiment, the signal generator further comprises a human-computer interaction interface, an output end of the human-computer interaction interface is electrically connected with the second input end of the main control circuit, the human-computer interaction interface is a keyboard selection unit, and simulation parameters of the actually measured physiological information are adjusted through a keyboard.
In one embodiment, the signal generator further includes a conversion selection circuit, an input end of the conversion selection circuit is electrically connected to an output end of the adjustment circuit, a first output end of the conversion selection circuit is electrically connected to an input end of the digital-to-analog conversion circuit, a second output end of the conversion selection circuit is electrically connected to a second input end of the output circuit, and the conversion selection circuit is configured to receive the amplified measured physiological information and a conversion selection instruction, determine a signal that needs digital-to-analog conversion in the measured physiological information according to the selection instruction, send the signal that needs digital-to-analog conversion in the measured physiological information to the digital-to-analog conversion circuit, and send the signal that needs to be output in a digital signal mode in the measured physiological information to the output circuit.
In one embodiment, the signal generator further comprises a power supply circuit, and an output end of the power supply circuit is electrically connected with the third input end of the main control circuit.
In one embodiment, the signal generator further includes a display screen electrically connected to the main control circuit for displaying setting parameters of the signal in the measured physiological information, where the setting parameters include a type, an amplitude, a frequency, and a phase of the signal.
In one embodiment, the signal generator is internally provided with a memory, and the memory is electrically connected with the third input end of the main control circuit and is used for storing normal standard physiological information.
To sum up, the utility model provides a signal generator. The signal generator comprises an input circuit, a main control circuit, a regulating circuit, a digital-to-analog conversion circuit and an output circuit. The first input end of the main control circuit is electrically connected with the output end of the input circuit, and pre-calibrated actual measurement physiological information is acquired from an external memory through the input circuit, wherein the actual measurement physiological information comprises chest respiration signals, abdominal respiration signals, nasal pressure signals, mouth and nose airflow signals, electroencephalogram signals, eye movement signals, mandible myoelectricity signals, electrocardio signals, leg muscle electric signals, blood oxygen pulse signals, snore signals and body position signals. The input end of the adjusting circuit is electrically connected with the first output end of the main control circuit, receives the actual measurement physiological information output by the main control circuit, amplifies the actual measurement physiological information, and generates the amplified actual measurement physiological information. The first input end of the digital-to-analog conversion circuit is electrically connected with the output end of the adjusting circuit and is used for receiving the amplified actual measurement physiological information, performing digital-to-analog conversion on the amplified actual measurement physiological information and generating an analog waveform corresponding to the actual measurement physiological information. The first input end of the output circuit is electrically connected with the output end of the digital-to-analog conversion circuit, and the output circuit is used for receiving and outputting an analog waveform corresponding to the actually measured physiological information. The utility model discloses in, through input circuit can acquire the actual measurement physiological information of demarcation in advance, wherein the actual measurement physiological information includes chest breathing signal, abdominal type breathing signal, nose pressure signal, mouth nose air current signal, EEG signal, eye movement signal, lower jaw flesh electrical signal, electrocardiosignal, leg muscle electrical signal, blood oxygen pulse signal, snore signal and position signal, consequently with this actual measurement physiological information provide the sleep breathing disorder check out test set of examination back, according to the judgement result of equipment output and the breathing disorder incident emergence moment of demarcation in advance, length of time and number of times isoparametric, testable this sleep breathing disorder check out test set's the degree of accuracy. In addition, the signal generator directly acquires data from the external memory, the signal source is stable and can be acquired at any time according to needs, the signal acquisition time is shortened, and the research and development period of the sleep disordered breathing detection device is shortened.
Drawings
Fig. 1 is an electrical schematic diagram of a signal generator according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a panel structure of a signal generator according to an embodiment of the present invention;
fig. 3 is an electrical schematic diagram of a signal generator according to an embodiment of the present invention;
fig. 4 is an exemplary signal of a central apnea event provided by an embodiment of the present invention;
fig. 5 is an exemplary signal for an obstructive apnea event provided by an embodiment of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.
Referring to fig. 1 and 2, an embodiment of the present invention provides a signal generator. The signal generator includes an input circuit 100, a main control circuit 200, a regulating circuit 300, a digital-to-analog conversion circuit 400, and an output circuit 500.
The first input end of the main control circuit 200 is electrically connected with the output end of the input circuit 100, and pre-calibrated actual measurement physiological information is acquired from an external memory through the input circuit 100, wherein the actual measurement physiological information comprises chest type respiration signals, abdominal type respiration signals, nasal pressure signals, mouth and nose airflow signals, electroencephalogram signals, eye movement signals, mandible electromyogram signals, electrocardiosignals, leg muscle electric signals, blood oxygen pulse signals, snore signals and body position signals.
The input end of the adjusting circuit 300 is electrically connected to the first output end of the main control circuit 200, receives the actual measurement physiological information output by the main control circuit 200, and amplifies the actual measurement physiological information to generate the amplified actual measurement physiological information.
A first input end of the digital-to-analog conversion circuit 400 is electrically connected to an output end of the adjusting circuit 300, and is configured to receive the amplified actual measurement physiological information, perform digital-to-analog conversion on the amplified actual measurement physiological information, and generate an analog waveform corresponding to the actual measurement physiological information.
A first input end of the output circuit 500 is electrically connected to an output end of the digital-to-analog conversion circuit 400, and the output circuit is configured to receive and output an analog waveform corresponding to the measured physiological information.
It can be understood that, when the common signal generator outputs sine waves or square waves to test the sleep disordered breathing detection device at present, the whole test method has many defects. For example, the development is replaced by sine waves or square waves, which is not necessarily applicable to the target physiological signal; if the signal is directly connected to a human body as a test signal, the signal is supposed to move, which causes inconsistency of signal source signals each time, and long-time aging test is impossible, and accuracy verification cannot be performed; in addition, the use of human body as signal source consumes much time, greatly prolongs the development period, and is not good for the stability of the product.
In this embodiment, the pre-calibrated measured physiological information can be obtained as the test signal through the input circuit 100, wherein the actually measured physiological information comprises chest respiration signals, abdominal respiration signals, nasal pressure signals, mouth and nose airflow signals, electroencephalogram signals, eye movement signals, mandible myoelectric signals, electrocardiosignals, leg muscle electric signals, blood oxygen pulse signals, snore signals and body position signals, so that after the actually measured physiological information is provided for the sleep respiratory disorder detection equipment to be tested, according to the judgment result of the sleep disordered breathing output by the equipment and the parameters such as the occurrence time, the duration, the frequency and the like of the disordered breathing event which are calibrated in advance, the accuracy of the sleep disordered breathing detection device can be tested, and the misjudgment rate of sleep events can be evaluated, so that the development, algorithm optimization and the like of the sleep disordered breathing detection device can be improved in a targeted manner. In addition, the signal generator directly acquires data from the external memory, the signal source is stable and can be acquired at any time according to needs, the signal acquisition time is shortened, and the research and development period of the sleep disordered breathing detection device is shortened. In this embodiment, the main control circuit includes a microcontrol Unit (MCU), and the microcontrol Unit obtains the measured physiological information from the external memory. The specific model of the micro control unit can be TI/STM32F407ZET6, and the like, and of course, can be specifically selected according to needs in specific applications. The adjusting circuit comprises an operational amplifier, and the amplitude, the frequency and the like of the actually measured physiological signal are adjusted through the operational amplifier according to the adjusting parameters, so that the actually measured physiological information is amplified. The digital-to-analog conversion circuit comprises a digital-to-analog converter, and the measured physiological information is converted into an analog signal from a digital signal through the digital-to-analog converter, so that the signal type input requirement of the sleep disordered breathing detection device to be detected is met.
In one embodiment, the input circuit 100 includes at least one input interface (not shown), and the main control circuit 200 is electrically connected to the external memory through the input interface, and acquires the measured physiological information from the external memory for detection.
In one embodiment, the input interface is an SD card interface or a USB interface. In this embodiment, the input circuit 100 includes two input interfaces, one of which is an SD card interface, and the other is a USB interface, so that it is avoided that the measured physiological information cannot be directly obtained from the external memory due to the lack of the SD card interface or the USB interface.
In this embodiment, the SD card is used to store the measured physiological information, that is, the SD card stores the real case related signal of the sleep disordered breathing event that has been calibrated in the PSG system, and the real case signal of the sleep disordered breathing event is stored in a digital signal mode. The real case signal of the sleep disordered breathing event is subjected to data calibration by an international acknowledged gold standard PSG system for diagnosing sleep disordered breathing diseases in the industry, and parameters such as the occurrence time of the disordered breathing event, the occurrence duration of the disordered breathing event, the occurrence frequency of the disordered breathing event and the like are mainly calibrated.
Common sleep disordered breathing event cases include: central apnea events and obstructive apnea events.
Referring to fig. 4, the main steps of calibrating the central apnea event include that the signal collected by the PSG system is judged by a professional technician as data of the patient all night, when it is detected that the amplitude of the oronasal airflow (nasal pressure or nasal heat sensitivity) is reduced by more than 90%, and the thoracic and abdominal respiratory effort is reduced by more than 90% without pararespiration, the central apnea event is recorded once, and the time when the central apnea event occurs is recorded, so as to complete the calibration of the central apnea event.
Referring to fig. 5, the main steps of calibrating an obstructive apnea event include that a signal collected by a PSG system is used by a professional technician to determine data of a patient all night, when it is detected that the amplitude of oronasal airflow (nasal pressure or nasal heat sensitivity) is reduced by more than 90%, and meanwhile, thoracic and abdominal respiratory effort is reduced by more than 90%, and respiratory effort contradictory movement occurs, the signal is recorded as an obstructive apnea event, and the time when the obstructive apnea event occurs is recorded, so as to complete the calibration of a central apnea event.
The PSG calibration aims at calibrating the detailed parameters of the signal source and providing data basis for the subsequent accuracy of product signal detection. Because the signal generator of the present invention is a signal generator that needs to be used in the development stage of the sleep disordered breathing detection device, the accuracy of signal detection of the developed product is verified to be tested and evaluated. The accuracy of the developed sleep disordered breathing detection device for detecting the signals can be judged only by using the signals of the real sleep disordered breathing event cases and knowing the signal parameters output by the signal generator and comparing the detected results of the developed products with each other.
In one embodiment, the output circuit 500 includes a plurality of output interface circuits, which are respectively electrically connected to the output terminals of the digital-to-analog conversion circuit 400, and each of the output interface circuits outputs one of the measured physiological information. It can be understood that the actually measured physiological information includes chest respiration signals, abdominal respiration signals, nasal pressure signals, oronasal airflow signals, electroencephalogram signals, eye movement signals, mandibular electromyogram signals, electrocardiosignals, leg myoelectric signals, blood oxygen pulse signals, snore signals and body position signals, the plurality of signals all occur synchronously, the plurality of specific physiological signals can be output synchronously through the plurality of output interfaces, a tester can know the signal parameters of the use test through synchronously calibrating related parameters of the signals of the sleep disordered breathing event, the accuracy and the misjudgment rate of the developed product can be evaluated by comparing the detected results of the developed product, and therefore the development of the product is improved in a targeted manner, and the detection of the accuracy of the sleep disordered breathing detection equipment is realized.
In one embodiment, each of the output interface circuits includes at least two output interfaces. In this embodiment, the output circuit includes an electroencephalogram signal output interface circuit 511, an ocular signal output interface circuit 512, a mandibular electromyogram signal output interface circuit 513, an electrocardiograph signal output interface circuit 514, a crural muscle electrical signal output interface circuit 515, an abdominal respiratory wave signal output interface circuit 516, a chest respiratory wave signal output interface circuit 517, a nasal airflow waveform signal output interface 518, a nasal pressure waveform signal output interface 519, a blood oxygen pulse signal output interface circuit 520, a snore signal 521, and a body position signal output interface 522. In this embodiment, the output interface may be a USB interface, or may be a serial communication interface, such as an RS-232-C interface.
In one embodiment, referring to fig. 5, a preprocessing circuit 1020 is disposed between the input circuit 100 and the main control circuit 200, an output end of the preprocessing circuit 1020 is electrically connected to an output end of the input circuit 100, and an output end of the preprocessing circuit 1020 is electrically connected to a first input end of the main control circuit 200, so that before the measured physiological information enters the main control circuit 200, a setting parameter of each physiological signal in the measured physiological information is preliminarily adjusted to change the physiological signal for frequency modulation and frequency modulation processing, and at the same time, the physiological signal is prevented from being too weak to be displayed.
In one embodiment, the signal generator further includes a human-computer interaction interface 600, an output end of the human-computer interaction interface 600 is electrically connected to the second input end of the main control circuit 200, the human-computer interaction interface 600 is a keyboard selection unit, and the simulation parameters of the measured physiological information are integrated through a keyboard.
In this embodiment, the human-computer interaction interface includes three keys arranged side by side, and the keys "set", "flip up/+" and "flip down/-" are arranged at one time, wherein the type and the simulation parameter of the signal to be adjusted can be selected through the key "set", the simulation parameter setting, such as the amplitude of the simulation waveform, can be increased through the key "flip up/+" and the simulation parameter setting can be decreased through the key "flip down/-".
In one embodiment, the signal generator further comprises a switching selection circuit 700, an input terminal of the switching selection circuit 700 is electrically connected with an output terminal of the adjusting circuit 300, a first output terminal of the conversion selection circuit 700 is electrically connected to an input terminal of the digital-to-analog conversion circuit 400, a second input terminal of the switching selection circuit 700 is electrically connected to a second output terminal of the main control circuit 200, the output end of the conversion selection circuit 700 is electrically connected to the input end of the output circuit 500, and is used for receiving the amplified actual measurement physiological information and the conversion selection instruction, determining the signal which needs to be subjected to digital-to-analog conversion in the actually measured physiological information according to the selection instruction, sending the signal which needs to be subjected to digital-to-analog conversion in the actually measured physiological information to the digital-to-analog conversion circuit, and sending the signal that needs to be output in the digital signal mode in the measured physiological information to the output circuit 500.
It can be understood that the physiological signals can only be stored in the form of digital signals, so that the signal generator can simulate the signals collected by the human body more truly by converting the digital signals stored in the memory into analog signals and outputting the analog signals to output various physiological signals as signal sources. Meanwhile, part of the physiological signals are not required to be output in the form of analog signals, for example, the body position signals, the blood oxygen value and the like can also be output in the mode of digital signals, so that the signal generator has the selection without digital-to-analog conversion by adding the conversion selection circuit 700, and the flexibility of the type of the output signals of the signal generator is increased.
In one embodiment, the signal generator further includes a power supply circuit 800, and an output terminal of the power supply circuit 800 is electrically connected to a third input terminal of the main control circuit 200.
In one embodiment, the signal generator further includes a display screen 900, and the display screen 900 is electrically connected to the main control circuit 200 and is configured to display setting parameters of the signal in the measured physiological information, where the setting parameters include a type, an amplitude, a frequency, and a phase of the signal. It can be understood that due to the existence of physiological differences, the amplitude differences of physiological signals collected by different people are large, signals with various amplitudes cannot exist in physiological information, and the simulation generation of more signals can be realized by adding a signal regulation function.
In one embodiment, the signal generator further comprises a built-in memory 1010 electrically connected to the third input terminal of the main control circuit 200 for storing normal standard physiological information. The internal memory 1010 mainly stores proportional standard physiological signals tested by the PSG system, such as electroencephalogram signals, eye movement signals, mandibular electromyogram signals, electrocardiosignals, leg muscle electrical signals, blood oxygen pulse signals, snore signals, body position signals and the like. However, the normal standard physiological information does not include respiratory effort signals, such as chest type respiratory signals, abdominal type respiratory signals, nasal pressure signals, oronasal airflow signals and the like, and therefore the normal standard physiological information can be used for providing continuous and stable signals for the sleep respiratory disorder detection equipment and realizing aging test detection of the sleep respiratory disorder detection equipment.
To sum up, the utility model provides a signal generator, inside carries on signal conditioning circuit 300, digital-to-analog conversion circuit 400, built-in memory 1010 and input interface, both can regard as the signal source independent according to built-in memory 1010, provide the analog signal that normal standard physiological information corresponds for sleep breathing disorder check out test set, also can regard the relevant signal of the true case of sleep breathing disorder incident as the signal source, provide the analog signal that actual measurement physiological information corresponds for sleep breathing disorder check out test set.
It can be understood that the physiological signals can only be stored in the form of digital signals, and therefore, when the signal generator outputs various physiological signals as a signal source, the digital signals must be converted into analog signals and then output, so that the signals collected by the human body can be simulated more truly. The process of converting digital signals into analog signals is called demodulation, digital quantity is formed by one-bit binary numbers, each bit controls the switch of a resistance switch network of a digital-to-analog converter in a chip, currents in proportion to each bit of the binary numbers are generated at the input end of an operational amplifier through the resistance network, the currents are added and converted through the operational amplifier to form analog voltages in proportion to the binary numbers, and the output signals are demodulated into the analog signals.
When the signal generator provided in this embodiment uses the built-in memory 1010 as a signal source, a user can adjust the type and amplitude of a signal to be output and the frequency parameters of a part of lead output signals by setting the keys and the display screen 900, and the signal generator processes the related lead signals through the signal adjusting module according to the parameters set by the user, and outputs the processed lead signals to the output interfaces of each analog signal after performing digital-to-analog conversion through the digital-to-analog conversion circuit 400.
The information transmitted by the physiological signal includes the type, amplitude, frequency and phase of the signal, and the user can set and adjust the parameters of the type, amplitude and frequency of the signal to be output through the keys and the display screen 900. In the adjustment process, the amplitude of the signal is selected according to the peak value of the output signal, and the adjustment circuit 300 multiplies the relevant physiological signal by a corresponding coefficient according to the analog parameter set by the user, and then changes the amplitude through digital-to-analog conversion. The frequency of the physiological signal reflects the period of the output physiological signal, part of the physiological signal has periodicity, such as an electrocardio signal, a respiratory wave signal and the like, and the adjusting circuit adjusts the interval time of the output physiological signal according to the frequency parameter set by a user, so that the frequency change of the analog signal of the output signal can be realized.
The output circuit 500 of the signal generator can select digital signal output and/or analog signal output when outputting the physiological signal. For example, if the user sets each channel of signal to select digital signal output, the conversion selection circuit will directly provide the physiological signal to the output circuit 500, and each channel of signal will directly output digital signal without conversion by the digital-to-analog conversion circuit. If the user sets each path of signal to select the analog signal output, the conversion selection circuit directly provides the physiological signal to the digital-to-analog conversion circuit 400, the digital signal is converted into the analog signal through the digital-to-analog conversion circuit, and the analog waveform of each path of signal is output to the sleep disordered breathing detection device through each output end.
When the signal generator is used as a signal generator related to a real case of a sleep disordered breathing event, only continuous measured physiological information of the calibrated sleep disordered breathing event needs to be acquired from an external memory and output. Before outputting the actually measured physiological information, the user can also set output parameters of each physiological signal, and then the output parameters are connected to the input end of each path of signal of a developed product through the output interface of each path of analog signal, namely, the real case-related signal of the sleep disordered breathing event which is calibrated in the PSG is used as a signal source.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A signal generator, comprising:
an input circuit;
the first input end of the main control circuit is electrically connected with the output end of the input circuit, and pre-calibrated actual measurement physiological information is acquired from an external memory through the input circuit, wherein the actual measurement physiological information comprises chest type respiration signals, abdominal type respiration signals, nasal pressure signals, mouth and nose airflow signals, electroencephalogram signals, eye movement signals, lower jaw electromyogram signals, electrocardiosignals, leg muscle electric signals, blood oxygen pulse signals, snore signals and body position signals;
the input end of the adjusting circuit is electrically connected with the first output end of the main control circuit, receives the actually measured physiological information output by the main control circuit, amplifies the actually measured physiological information and generates the amplified actually measured physiological information;
a digital-to-analog conversion circuit, a first input end of which is electrically connected with an output end of the regulating circuit, and is used for receiving the amplified actual measurement physiological information, performing digital-to-analog conversion on the amplified actual measurement physiological information, and generating an analog waveform corresponding to the actual measurement physiological information; and
and a first input end of the output circuit is electrically connected with an output end of the digital-to-analog conversion circuit, and the output circuit is used for receiving and outputting an analog waveform corresponding to the actually measured physiological information.
2. The signal generator of claim 1, wherein the input circuit comprises at least one input interface through which the master circuit is electrically connected with the external memory.
3. The signal generator of claim 2, wherein the input interface is an SD card interface or a USB interface.
4. The signal generator of claim 1, wherein the output circuit comprises a plurality of output interface circuits, the output interface circuits are electrically connected to the output terminals of the digital-to-analog conversion circuits, respectively, and each of the output interface circuits outputs one of the measured physiological information.
5. The signal generator of claim 4, wherein each of the output interface circuits includes at least two output interfaces.
6. The signal generator of claim 1, further comprising a human-machine interface, wherein an output terminal of the human-machine interface is electrically connected to the second input terminal of the main control circuit, and the human-machine interface is a keyboard selection unit, and the simulation parameters of the measured physiological information are adjusted by a keyboard.
7. The signal generator of claim 1, further comprising a conversion selection circuit, wherein an input terminal of the conversion selection circuit is electrically connected to an output terminal of the adjustment circuit, a first output terminal of the conversion selection circuit is electrically connected to an input terminal of the digital-to-analog conversion circuit, and a second output terminal of the conversion selection circuit is electrically connected to a second input terminal of the output circuit, and is configured to receive the amplified measured physiological information and a conversion selection instruction, determine a signal that needs digital-to-analog conversion in the measured physiological information according to the selection instruction, send the signal that needs digital-to-analog conversion in the measured physiological information to the digital-to-analog conversion circuit, and send a signal that needs to be output in a digital signal mode in the measured physiological information to the output circuit.
8. The signal generator of claim 1, further comprising a power supply circuit, an output of the power supply circuit being electrically connected to a third input of the master circuit.
9. The signal generator of claim 1, further comprising a display screen electrically connected to the main control circuit for displaying setting parameters of the signal in the measured physiological information, wherein the setting parameters include a type, an amplitude, a frequency and a phase of the signal.
10. The signal generator of claim 1, further comprising a built-in memory electrically connected to the third input of the master control circuit for storing normal standard physiological information.
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| CN201921102349.0U CN211299917U (en) | 2019-07-15 | 2019-07-15 | Signal generator |
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