CN209884119U - Multi-parameter tester of medical monitor - Google Patents
Multi-parameter tester of medical monitor Download PDFInfo
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- CN209884119U CN209884119U CN201920104556.3U CN201920104556U CN209884119U CN 209884119 U CN209884119 U CN 209884119U CN 201920104556 U CN201920104556 U CN 201920104556U CN 209884119 U CN209884119 U CN 209884119U
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Abstract
The utility model discloses a multi-parameter tester of medical monitor, including singlechip, human-computer interface, temperature measurement module, temperature simulation module, electrocardio simulation module, invasive blood pressure simulation module, baseline impedance and respiratory wave simulation module, amplitude modulation module and voltage reference module. The utility model simulates the parameters of the human body such as electrocardio, respiration, invasive blood pressure, body temperature and the like, provides 4 respiratory wave simulation functions with different baselines, has adjustable respiratory impedance and variable respiratory wave measurement reference leads; the 2-channel invasive blood pressure simulation function with the isolated output capacity can realize the simulation capacity of static pressure and dynamic invasive pressure of different parts, has the same input and output resistance of common invasive blood pressure sensor chips and provides the simulation functions of two common sensitivity coefficients; provides a body temperature probe simulation function, provides two temperature measurement thermistor simulation functions with common specifications, and can be used for detection and maintenance of various medical monitors.
Description
Technical Field
The utility model relates to a detection technology of medical monitor, especially a multi-parameter tester of medical monitor.
Background
The medical monitor is one of the most popular medical electronic instruments, and converts physiological signals of a patient into electric signals by using a sensor, so that the parameters of electrocardio, invasive blood pressure, respiration, body temperature, noninvasive blood pressure, blood oxygen saturation and the like of the patient can be detected in real time, and the functions of alarming, storing and network transmission are provided.
The prior monitor tester in China has two types, one is a simple signal generator which can provide signal simulation with one to two functions; one is full-function, providing simulation of four functions. The output attenuation network is switched by using an analog switch in part of design, so that the circuit is easily influenced by the change of the ambient temperature and has high circuit complexity; the invasive blood pressure simulation function is partially designed, and the power isolation function with a host is not realized, so that problems are easy to occur when multi-parameter measurement such as electrocardio and invasive blood pressure is carried out; the electrocardio output right leg binding post of part design directly does ground connection and handles, and under some circumstances, the right leg drive circuit that the monitor was designed can add a signal to the right leg binding post and resist interference, if do not consider this kind of circumstances, the easy interference test result. The synchronous output of electrocardio, respiration, interference and invasive blood pressure cannot be realized by partial design.
Chinese patent CN201110436650.7 discloses a biomedical signal simulator, which comprises a central processing unit and an analog signal output circuit, wherein the central processing unit is connected to the analog signal output circuit through a single chip, the single chip comprises D/a conversion output, wherein the analog signal output circuit comprises: the device comprises an electrocardiogram data analog circuit, a respiration data analog circuit, an invasive blood pressure data analog circuit and a body temperature data analog circuit; the simulator can adjust the analog quantity in a man-machine conversation mode according to different human body parameter characteristics, so that the reality and the accuracy of a simulation signal are improved, and the simulator has a good man-machine interaction function; the simulator provides electrocardio simulation and test, multi-channel noninvasive blood pressure control, respiration simulation data setting and various common temperature outputs.
The simulator belongs to a full-functional type, but has the following problems:
firstly, the invasive blood pressure simulation circuit is not isolated from a power supply of a host, so that problems are easy to occur when multi-parameter measurement such as electrocardio and invasive blood pressure is carried out simultaneously, and the actual use condition of the invasive blood pressure simulation circuit is different from that of an invasive blood pressure sensor;
secondly, the synchronous output capacity of electrocardio, respiration, interference and invasive blood pressure is not realized;
thirdly, a body temperature simulation function is realized by utilizing a digital potentiometer, and the simulation precision is easily influenced by temperature change and step resistance value errors;
fourthly, a multi-chip processor is used, an extended communication port mode is used, the structure is complex to realize, and the power consumption is high;
fifthly, pacing pulse simulation adopts a fixed pulse amplitude power supply and a variable resistance voltage division mode, and a variable resistance voltage division circuit uses an analog switch chip and is easily influenced by temperature change;
sixthly, the pacing pulse simulation adopts a variable resistance voltage division mode, and when the variable resistance voltage division ratio is changed during the synthesis of the simulated cardiac electric wave and the pacing signal wave, the amplitude of the output simulated cardiac electric wave is changed;
seventhly, the right leg wiring terminal is directly grounded, and an absorption resistor for absorbing the right leg driving signal is not arranged.
SUMMERY OF THE UTILITY MODEL
For solving the above-mentioned problem that prior art exists, the utility model discloses can enough detect all parameters such as electrocardio, invasive blood pressure, breathing, body temperature of multi-parameter monitor, can guarantee again that the detection capability of using multi-parameter monitor is reliable and stable and simple structure, the low power consumption's multi-parameter tester of medical monitor.
In order to achieve the above purpose, the technical solution of the present invention is as follows: a multi-parameter tester of a medical monitor comprises a single chip microcomputer, a human-computer interface, a power management module, a temperature measurement module, a temperature simulation module, an electrocardio simulation module, an invasive blood pressure simulation module, a baseline impedance and respiratory wave simulation module, an amplitude adjustment module and a voltage reference module, wherein the single chip microcomputer is respectively connected with the human-computer interface, the power management module, the temperature measurement module, the temperature simulation module, the electrocardio simulation module, the invasive blood pressure simulation module, the baseline impedance and respiratory wave simulation module and the amplitude adjustment module; the input end of the amplitude adjusting module is connected with the voltage reference module; the baseline impedance and respiratory wave simulation module is also respectively connected with the electrocardio simulation module and the electrocardio output terminal; the temperature simulation module is connected with the body temperature simulation interface, and the invasive blood pressure simulation module is connected with the invasive blood pressure interface; the invasive blood pressure interface comprises an invasive blood pressure channel A interface and an invasive blood pressure channel B interface;
the human-computer interface comprises a display screen, a switch key, a function key and a buzzer.
Furthermore, the single chip microcomputer, the human-computer interface, the power management module, the temperature measurement module, the temperature simulation module, the electrocardio simulation module, the invasive blood pressure simulation module, the baseline impedance and respiratory wave simulation module, the amplitude adjustment module and the voltage reference module are integrated in a box body, a display screen, a switch key and a function key are arranged on an upper panel of the box body, 10 electrocardio output terminals are arranged on the left side of the box body, and a body temperature simulation interface, an invasive blood pressure channel A interface, an invasive blood pressure channel B interface and a communication and charging port are arranged on the rear side of the box body.
Further, the power management module comprises a 2400mAh lithium battery.
Further, the singlechip adopts an ATMEGA128A microprocessor.
Further, the display screen is an LCD2004 display screen.
Furthermore, the electrocardio output terminals comprise ten terminals of N, R, L, F, V1, V2, V3, V4, V5 and V6, and are used for synchronously generating 12 electrocardio waveforms, namely 12 leads.
Further, the baseline impedance and respiratory wave simulation module comprises a baseline impedance simulation circuit and a respiratory wave simulation circuit.
Furthermore, the electrocardio simulation module comprises a simulation electrocardiowave generating circuit and a pacing pulse wave generating circuit, the simulation electrocardiowave generating circuit is connected with the waveform synthesis circuit, the pacing pulse wave generating circuit is connected with the waveform synthesis circuit through a simulation switch circuit, the waveform synthesis circuit is connected with the voltage division attenuation circuit, and the voltage division attenuation circuit is connected with the baseline impedance and respiratory wave simulation module.
Furthermore, the baseline impedance and respiratory wave simulation module comprises a baseline impedance simulation circuit and a respiratory wave simulation circuit, the input end of the baseline impedance simulation circuit is connected with the electrocardio simulation module, the output end of the baseline impedance simulation circuit is connected with the respiratory wave simulation circuit, the other input end of the respiratory wave simulation circuit is connected with the electrocardio simulation module, and the output end of the respiratory wave simulation circuit is connected with the electrocardio output terminal.
Further, the invasive blood pressure simulation module comprises a magnetic coupling and communication isolation chip ADUM1300, a digital-to-analog converter LTC1590, a precision operational amplifier circuit, an input resistance voltage division network, an invasive blood pressure interface, an output resistance voltage division network and an isolation power supply, wherein an output end of the magnetic coupling and communication isolation chip ADUM1300 is connected to the digital-to-analog converter LTC1590, an output end of the isolation power supply is connected to the digital-to-analog converter LTC1590, an output end of the digital-to-analog converter LTC1590 is connected to the invasive blood pressure interface through the precision operational amplifier circuit and the output resistance voltage division network, the invasive blood pressure interface is connected to an input end of the digital-to-analog converter LTC1590 through the input resistance voltage division network, and the digital-to-analog converter LTC1590 is a 2-channel.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model can simulate the electrocardio, respiration, invasive blood pressure, body temperature and other parameters of human body, and can be used for the detection and maintenance of various medical monitors. The electrocardiosignal provides twelve-lead synchronous and independent output, 16-bit precision, and the right leg drives an absorption resistor to provide short pulse and high-amplitude pacing pulse simulation capability; 4 respiratory wave simulation functions with different baselines are provided, the respiratory impedance is adjustable, and the respiratory wave measurement reference leads are variable; the 2-channel invasive blood pressure simulation function with the isolated output capacity can realize the simulation capacity of static pressure and dynamic invasive pressure of different parts, has the same input and output resistance of common invasive blood pressure sensor chips and provides the simulation functions of two common sensitivity coefficients; providing a body temperature probe simulation function and providing two temperature measurement thermistor simulation functions with common specifications; providing various metering waveforms, simulating electrocardio waves, interference waves (50Hz, 60Hz, myoelectricity interference and respiration interference), ST-segment change waves and common abnormal waves, and synchronously changing electrocardio, respiration and invasive blood pressure; the volume is small, the design of low power consumption, and the rechargeable lithium battery with large capacity is used, so that the service life of more than 60 hours is provided.
2. The utility model can be applied to medical measurement, and can be used for calibrating and verifying the monitor in use by medical institutions; the utility model discloses also can be applied to medical institution's apparatus maintenance departments such as equipment branch of academic or vocational study, develop the test and the maintenance to this unit in-use monitor.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic diagram of the components of the electrocardiograph simulation module.
FIG. 3 is a schematic diagram of the components of the baseline impedance and respiratory wave simulation module.
Fig. 4 is a schematic diagram of the components of the invasive blood pressure simulation module.
Fig. 5 is an external view of the present invention.
In the figure: 1. display screen, 2, switch button, 3, electrocardio output terminal, 4, function button, 5, body temperature simulation interface, 6, invasive blood pressure passageway A interface, 7: invasive blood pressure channel B interface, 8, communication and charging port.
Detailed Description
The invention is further described below with reference to the accompanying drawings. As shown in fig. 1-5, a multi-parameter tester of a medical monitor comprises a single chip microcomputer, a human-computer interface, a power management module, a temperature measurement module, a temperature simulation module, an electrocardio simulation module, an invasive blood pressure simulation module, a baseline impedance and respiratory wave simulation module, an amplitude adjustment module and a voltage reference module, wherein the single chip microcomputer is respectively connected with the human-computer interface, the power management module, the temperature measurement module, the temperature simulation module, the electrocardio simulation module, the invasive blood pressure simulation module, the baseline impedance and respiratory wave simulation module and the amplitude adjustment module; the input end of the amplitude adjusting module is connected with the voltage reference module; the baseline impedance and respiratory wave simulation module is also respectively connected with the electrocardio simulation module and the electrocardio output terminal 3; the temperature simulation module is connected with the body temperature simulation interface 5, and the invasive blood pressure simulation module is connected with the invasive blood pressure interface; the invasive blood pressure interface comprises an invasive blood pressure channel A interface 6 and an invasive blood pressure channel B interface 7;
the human-computer interface comprises a display screen 1, a switch key 2, a function key 4 and a buzzer.
Further, the single chip microcomputer, the human-computer interface, the power management module, the temperature measurement module, the temperature simulation module, the electrocardio simulation module, the invasive blood pressure simulation module, the baseline impedance and respiratory wave simulation module, the amplitude adjustment module and the voltage reference module are integrated in a box body, a display screen 1, a switch key 2 and a function key 4 are arranged on an upper panel of the box body, 10 electrocardio output terminals 3 are arranged on the left side of the box body, and a body temperature simulation interface 5, an invasive blood pressure channel A interface 6, an invasive blood pressure channel B interface 7 and a communication and charging port 8 are arranged on the rear side of the box body.
Further, the power management module comprises a 2400mAh lithium battery.
Further, the singlechip adopts an ATMEGA128A microprocessor.
Further, the display screen 1 is an LCD2004 display screen 1.
Furthermore, the electrocardiograph output terminal 3 comprises ten terminals of N, R, L, F, V1, V2, V3, V4, V5 and V6, and is used for synchronously generating 12 electrocardiograph waveforms, namely 12 leads.
Further, the baseline impedance and respiratory wave simulation module comprises a baseline impedance simulation circuit and a respiratory wave simulation circuit.
Furthermore, the electrocardio simulation module comprises a simulation electrocardiowave generating circuit and a pacing pulse wave generating circuit, the simulation electrocardiowave generating circuit is connected with the waveform synthesis circuit, the pacing pulse wave generating circuit is connected with the waveform synthesis circuit through a simulation switch circuit, the waveform synthesis circuit is connected with the voltage division attenuation circuit, and the voltage division attenuation circuit is connected with the baseline impedance and respiratory wave simulation module.
Furthermore, the baseline impedance and respiratory wave simulation module comprises a baseline impedance simulation circuit and a respiratory wave simulation circuit, the input end of the baseline impedance simulation circuit is connected with the electrocardio simulation module, the output end of the baseline impedance simulation circuit is connected with the respiratory wave simulation circuit, the other input end of the respiratory wave simulation circuit is connected with the electrocardio simulation module, and the output end of the respiratory wave simulation circuit is connected with the electrocardio output terminal 3.
Further, the invasive blood pressure simulation module comprises a magnetic coupling and communication isolation chip ADUM1300, a digital-to-analog converter LTC1590, a precision operational amplifier circuit, an input resistance voltage division network, an invasive blood pressure interface, an output resistance voltage division network and an isolation power supply, wherein the output end of the magnetic coupling and communication isolation chip ADUM1300 is connected to the digital-to-analog converter LTC1590, the output end of the isolation power supply is connected to the digital-to-analog converter LTC1590, the output end LTC1590 of the digital-to-analog converter is connected to the invasive blood pressure interface through the precision operational amplifier circuit and the output resistance voltage division network, the invasive blood pressure interface is connected to the input end of the digital-to-analog converter LTC1590 through the input resistance voltage division network, and the digital-to-analog converter LTC1590 is a 2-channel.
The utility model discloses an each module function as follows:
1. voltage reference module
The voltage reference module uses a low temperature drift (3ppm)2.5V reference ADR03 to output a voltage reference to the amplitude adjustment module.
2. Amplitude adjusting module
The amplitude adjustment module uses a double-path 12-bit digital-to-analog conversion chip TLV5618, and the amplitude adjustment module outputs two paths of signals A, B to the electrocardio simulation module.
3. Electrocardio simulation module
The electrocardio simulation module consists of two parts, namely a simulation electrocardiowave generating circuit and a pacing pulse wave generating circuit, and the structure is shown in figure 2. The amplitude adjustment module outputs a signal A to the analog electrocardiowave generating circuit to be used as a reference voltage of the analog electrocardiowave generating circuit; the amplitude adjusting module outputs a signal B to the pacing pulse wave generating circuit for setting the amplitude of the output pacing pulse.
For an analog cardiac wave generation circuit, it is essentially a combination of a low frequency arbitrary waveform generator, a resistive divider, and a specific impedance circuit. The utility model discloses a standard 12 modes of leading correspond 3 numbers of electrocardio output terminal and be 10, compatible common 3 modes of leading and 5 modes of leading, have guaranteed the commonality. The utility model discloses use 3 16 digital-to-analog converter DACs 8554 of 4 passageway pieces, use DDS (direct digital frequency synthesis) mode synthesis standard 12 to lead 9 way simulation heart electric waves that need output (correspond R, L, F, V1 ~ V6 respectively, 9 passageways), the respiratory wave that the respiratory wave analog part of output needs to be used simultaneously sets for voltage signal, exports the simulation wave form and exports baseline impedance and respiratory wave analog module behind the resistance divider decay. The utility model discloses a circuit structure is simplified to the mode of variable reference voltage, fixed resistance partial pressure.
The pace pulse signal generating circuit is composed of an output B of a digital-to-analog converter, a low on-resistance analog switch MAX4624 and a resistance voltage divider. The output B of the digital-to-analog converter outputs a set amplitude voltage, a pacing pulse signal is generated through the quick switching action of the analog switch, and the synthesis of the analog cardiac electric wave and the pacing pulse wave is completed in a mode that the resistor is connected in series to the resistor divider at the tail end of the analog waveform generation circuit.
By the design, the utility model can provide short pulse and high amplitude pacing pulse simulation capability; and after the analog cardiac electric wave and the pacing signal are synthesized by adopting a fixed resistance voltage division mode, outputting the amplitude change amplitude ratio of the analog cardiac electric wave as a fixed value, and correcting by software.
4. Baseline impedance and respiratory wave simulation module
The baseline impedance and respiratory wave simulation module comprises two double-path 4-to-1 simulation switch chips 74HC4052, a fixed resistance precision resistor, a small resistance adjustable resistor mode, an adder formed by precision operational amplifiers, a switching relay and the like. The baseline impedance and respiratory wave simulation module is connected in series at the rear end of the output wave of the electrocardio simulation module, and the structure is shown in figure 3.
For the simulation of the base line impedance, a fixed-resistance precision resistor and a small-resistance adjustable resistor are connected in series, the simulation function of 4 different base line impedances between 500 omega and 2000 omega is realized by combining a channel on-resistance of a simulation switch, and the switching of 4 paths of impedances is realized by utilizing the function of 1 from 4 of the simulation switch. Switching between different baseline impedances to provide variable baseline impedance of 500 omega-2000 omega and 500 omega as step at I, II and III leads; between the V leads is a fixed 1000 Ω impedance.
For the simulation of the respiratory wave, a respiratory wave setting voltage signal and a fixed amplitude voltage output by the electrocardio simulation module are realized by utilizing a specific relation among an analog switch channel on-resistance Ron, an input signal voltage Vis and a power supply voltage Vcc, the respiratory wave setting voltage signal and the fixed amplitude voltage are synthesized by an operational amplifier adder, the respiratory wave setting voltage signal and the fixed amplitude voltage are used as a baseline impedance and a path of analog switch working voltage in a respiratory wave analog circuit after being buffered, and the analog switch channel resistance generates a corresponding resistance value change delta Ron by utilizing the change of the respiratory wave setting voltage signal, so that the simulation of the respiratory wave is completed. Considering that the transthoracic impedance measurement leads selected by different monitor manufacturers may be different, the singlechip provides respiratory wave simulation capabilities of different leads by controlling the switching mode of the relay.
5. Invasive blood pressure simulation module
The invasive blood pressure simulation module comprises a 2-channel 12-bit digital-to-analog converter LTC1590, a precision operational amplifier, an input resistance voltage division network, an output resistance voltage division network, an isolation power supply, a magnetic coupling and communication isolation chip ADUM1300 and an invasive blood pressure interface (the structure is shown in figure 4). The invasive blood pressure simulation module provides simulation functions of two common sensitivity coefficients (5 muV/V/mmHg and 40 muV/V/mmHg), provides two ways of invasive blood pressure simulation capabilities, and can reliably work within the range of input excitation voltage amplitude +/-10V and working frequency range DC-5000 Hz.
The invasive blood pressure simulation module adopts the working principle of a four-quadrant multiplier, directly accesses the excitation voltage provided by the monitor to a reference voltage end of a digital-to-analog converter through a precision resistor voltage division network, and outputs a corresponding simulated invasive blood pressure waveform by combining a specific sensitivity coefficient a and set pressure data. The invasive blood pressure simulation module has the same input and output resistances of a common invasive blood pressure sensor chip by selecting a specific input and output resistance voltage division network. The invasive blood pressure simulation module is connected with the power supply of the tester by using the isolation power supply and is communicated with the single chip microcomputer by the magnetic coupling and isolation communication chip, so that the invasive blood pressure simulation module is isolated from other modules of the tester, and the actual use condition of the invasive blood pressure sensor is met.
The invasive blood pressure simulation module can provide zero point, static pressure and various dynamic pressure simulation capabilities. The invasive blood pressure interface is reliable and stable in mechanical connection, the interface contact resistance is small, and the influence on the input voltage divider network can be ignored.
6. Body temperature simulation module
The body temperature simulation module adopts a low-conduction channel resistor simulation switch chip MAX4624, a fixed-resistance low-temperature-drift precision resistor and a small-resistance adjustable resistor series circuit to realize one-path specific resistance simulation. The simulation series circuit with the same structure and different simulation resistance values is connected in parallel, a singlechip controls a specified fixed impedance channel to be conducted, and the simulation of the resistance values of two common negative temperature coefficients (25 ℃ @2.252K Ω B25/50 ═ 3935K, 25 ℃ @10K Ω B25/50 ═ 3935K) is realized (which are parameters of the thermistor, one defines the resistance value of the thermistor at 25 ℃, and the other is the ratio of the resistance value of one temperature of the thermistor to the resistance value at another temperature, which is a specific parameter of the thermistor), and the simulation of the resistance values of the temperature probe thermistor under 4 different temperature conditions are realized.
7. Temperature measuring module
The temperature measuring module is mainly composed of a single-bus temperature measuring chip DS18B20, and the temperature measuring chip is bonded on an analog switch chip of the baseline impedance and respiratory wave analog module through a heat-conducting silica gel. When the on-resistance of the analog switch channel changes due to the change of the environmental temperature, the single chip microcomputer reads the environmental temperature in real time, the respiratory wave setting voltage amplitude mode of the electrocardio analog module is adjusted through software according to the temperature change, the on-resistance value of the analog switch chip of the respiratory analog and body temperature analog parts is slightly corrected, and the purpose of reducing errors is achieved.
8. ECG output terminal 3
The number of the electrocardio output terminals is 10, which meets the physical connection requirements of common electrocardiograph and electrocardiogram monitor leads, and the right leg connecting terminal N is provided with an absorption resistor which is used as a driving signal absorption resistor of the right leg of the tested equipment.
The utility model discloses a use method as follows:
when the medical monitor is used for detection, firstly, the electrocardiographic lead wire of the monitor is connected to the corresponding electrocardiographic lead wire terminal of the utility model according to the specification; connecting an invasive blood pressure simulation switching box to a multi-parameter test corresponding interface, and wiring according to the definition of an invasive blood pressure sensor; and connecting the body temperature connector to the corresponding interface of the multi-parameter test according to the corresponding connection. At this moment, the monitor is physically connected with the utility model.
And starting the multi-parameter tester, inputting a command through the function keys, outputting simulation parameters by the tester, reading the reading of the medical monitor, and judging the performance of the tested monitor according to the reading.
The present invention is not limited to the embodiment, and any equivalent concept or change within the technical scope of the present invention is all listed as the protection scope of the present invention.
Claims (10)
1. The utility model provides a multi-parameter tester of medical monitor which characterized in that: the device comprises a single chip microcomputer, a human-computer interface, a power management module, a temperature measurement module, a temperature simulation module, an electrocardio simulation module, an invasive blood pressure simulation module, a baseline impedance and respiratory wave simulation module, an amplitude adjustment module and a voltage reference module, wherein the single chip microcomputer is respectively connected with the human-computer interface, the power management module, the temperature measurement module, the temperature simulation module, the electrocardio simulation module, the invasive blood pressure simulation module, the baseline impedance and respiratory wave simulation module and the amplitude adjustment module; the input end of the amplitude adjusting module is connected with the voltage reference module; the baseline impedance and respiratory wave simulation module is also respectively connected with the electrocardio simulation module and the electrocardio output terminal (3); the temperature simulation module is connected with the body temperature interface, and the invasive blood pressure simulation module is connected with the invasive blood pressure interface; the invasive blood pressure interface comprises an invasive blood pressure channel A interface (6) and an invasive blood pressure channel B interface (7);
the human-computer interface comprises a display screen (1), a switch key (2), a function key (4) and a buzzer.
2. The multi-parameter tester for medical monitors of claim 1, wherein: singlechip, human-computer interface, power management module, temperature measurement module, temperature simulation module, electrocardio analog module, invasive blood pressure analog module, baseline impedance and respiratory wave analog module, amplitude modulation module and voltage reference module integration in a box, the top panel of box set up display screen (1), switch button (2) and function button (4), the box left side set up 10 electrocardio output terminal (3), the box rear side set up body temperature simulation interface (5), invasive blood pressure passageway A interface (6), invasive blood pressure passageway B interface (7) and communication and charge mouth (8).
3. The multi-parameter tester for medical monitors of claim 1, wherein: the power management module comprises a 2400mAh lithium battery.
4. The multi-parameter tester for medical monitors of claim 1, wherein: the single chip microcomputer adopts an ATMEGA128A microprocessor.
5. The multi-parameter tester for medical monitors of claim 1, wherein: the display screen (1) is an LCD2004 display screen (1).
6. The multi-parameter tester for medical monitors of claim 1, wherein: the electrocardio output terminal (3) comprises ten terminals of N, R, L, F, V1, V2, V3, V4, V5 and V6, and is used for synchronously generating 12 electrocardio waveforms, namely 12 leads.
7. The multi-parameter tester for medical monitors of claim 1, wherein: the baseline impedance and respiratory wave simulation module comprises a baseline impedance simulation circuit and a respiratory wave simulation circuit.
8. The multi-parameter tester for medical monitors of claim 1, wherein: the electrocardio simulation module comprises a simulation electrocardiowave generating circuit and a pacing pulse wave generating circuit, the simulation electrocardiowave generating circuit is connected with a waveform synthesis circuit, the pacing pulse wave generating circuit is connected with the waveform synthesis circuit through a simulation switch circuit, the waveform synthesis circuit is connected with a voltage division attenuation circuit, and the voltage division attenuation circuit is connected with a baseline impedance and respiratory wave simulation module.
9. The multi-parameter tester for medical monitors of claim 1, wherein: the baseline impedance and respiratory wave simulation module comprises a baseline impedance simulation circuit and a respiratory wave simulation circuit, the input end of the baseline impedance simulation circuit is connected with the electrocardio simulation module, the output end of the baseline impedance simulation circuit is connected with the respiratory wave simulation circuit, the other input end of the respiratory wave simulation circuit is connected with the electrocardio simulation module, and the output end of the respiratory wave simulation circuit is connected with the electrocardio output terminal (3).
10. The multi-parameter tester for medical monitors of claim 1, wherein: the invasive blood pressure simulation module comprises a magnetic coupling and communication isolation chip ADUM1300, a digital-to-analog converter LTC1590, a precision operational amplifier circuit, an input resistance voltage division network, an invasive blood pressure interface, an output resistance voltage division network and an isolation power supply, wherein the output end of the magnetic coupling and communication isolation chip ADUM1300 is connected to the digital-to-analog converter LTC1590, the output end of the isolation power supply is connected to the digital-to-analog converter LTC1590, the output end of the digital-to-analog converter LTC1590 is connected to the invasive blood pressure interface through the precision operational amplifier circuit and the output resistance voltage division network, the invasive blood pressure interface is connected to the input end of the digital-to-analog converter LTC1590 through the input resistance voltage division network, and the digital-to-analog converter LTC1590 is a 2.
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| CN201920104556.3U CN209884119U (en) | 2019-01-22 | 2019-01-22 | Multi-parameter tester of medical monitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113907730A (en) * | 2021-10-19 | 2022-01-11 | 广州市番禺区中心医院(广州市番禺区人民医院、广州市番禺区心血管疾病研究所) | Invasive blood pressure monitor detection equipment and system |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113907730A (en) * | 2021-10-19 | 2022-01-11 | 广州市番禺区中心医院(广州市番禺区人民医院、广州市番禺区心血管疾病研究所) | Invasive blood pressure monitor detection equipment and system |
| CN113907730B (en) * | 2021-10-19 | 2024-05-17 | 广州市番禺区中心医院(广州市番禺区人民医院、广州市番禺区心血管疾病研究所) | Invasive blood pressure monitor detection equipment and system |
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