CN118490193A - Dynamic simulation and calibration method, device and system of blood pressure simulator - Google Patents
Dynamic simulation and calibration method, device and system of blood pressure simulator Download PDFInfo
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Abstract
The invention relates to the field of medical equipment, in particular to a method, a device and a system for power simulation and calibration of a blood pressure simulator. The voice coil motor and the vibration exciter are used for simulating the high-accuracy invasive arterial blood pressure waveform, meanwhile, the output of the voice coil motor and the output of the vibration exciter are calibrated through the output simulated by the stepping motor, the more precise and accurate invasive arterial blood pressure waveform is further simulated, in addition, the two paths of blood pressure simulation waveform signals which are output simultaneously can be respectively suitable for the simulated blood pressure of the invasive blood pressure meter and the noninvasive blood pressure meter, the application range of the product is improved, and meanwhile, the accuracy of the product is improved.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a method, a device and a system for power simulation and calibration of a blood pressure simulator.
Background
The blood pressure measurement is divided into an invasive measurement method and a non-invasive measurement method, the advantages and disadvantages of the two blood pressure measurement methods are not nearly the same, the invasive blood pressure measurement needs to cut or puncture an arterial blood vessel and directly put a measurement probe into the blood vessel to perform blood pressure measurement, the blood pressure measurement method is generally used for an intensive care unit and an operating room, the non-invasive blood pressure measurement method is generally used for daily blood pressure measurement, and the two measurement modes are different in use prospect.
The blood pressure simulator is used for simulating and detecting blood pressure, plays an auxiliary role in the design process of the front stage of the sphygmomanometer for simulating the blood pressure for the invasive or noninvasive sphygmomanometer, is mostly a single blood pressure simulator, and generates dynamic pressure waveforms based on the principle of vibration of a stepping motor. According to the requirements of IEC 60601-2-34 on the invasive blood pressure monitor, the invasive blood pressure simulator needs to output a smooth sine wave curve and a triangular wave curve, and the waveform frequency is above 10 hz. The prior stepping motor has complex structure and high noise, is difficult to avoid errors caused by a mechanical transmission system, cannot effectively output sine waves, and can not well restore the blood pressure simulation process because the response of the stepping motor cannot follow the frequency change and the step-out phenomenon occurs if the speed change is too large in repeated motion due to the inertia effect of the stepping motor, so the response waveform frequency of the stepping motor cannot reach more than 10Khz and cannot meet the requirement of a monitor.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a method for calibrating a blood pressure simulator, and the blood pressure simulation method is also applicable to both invasive and non-invasive blood pressure simulators.
In one aspect, the present invention provides a method for power simulation and calibration of a blood pressure simulator, comprising:
Receiving a first blood pressure waveform parameter, wherein the first blood pressure waveform parameter is a preset blood pressure waveform parameter, and the first blood pressure waveform parameter comprises the type, amplitude and frequency of a blood pressure waveform;
according to the amplitude and the frequency of the first blood pressure waveform parameter, a driving signal is sent to drive a voice coil motor or a vibration exciter to work, and the voice coil motor or the vibration exciter is connected with a first hydraulic cylinder through a first connecting rod to drive liquid in the first hydraulic cylinder to vibrate;
driving a stepping motor to work according to the first blood pressure waveform parameters, wherein the stepping motor is connected with a second hydraulic cylinder through a second connecting rod to drive liquid in the second hydraulic cylinder to vibrate;
Receiving feedback signals, wherein the feedback signals comprise a first feedback signal and a second feedback signal, the first feedback signal is generated by a pressure feedback module according to liquid vibration in a first hydraulic cylinder, the pressure feedback module is connected with the first hydraulic cylinder, the second feedback signal is generated by a vibration sensor according to liquid vibration in a second hydraulic cylinder, and the vibration sensor is positioned on the inner wall of the second hydraulic cylinder;
And calculating a first difference value between the first feedback signal and the second feedback signal, and adjusting the first blood pressure waveform parameter to obtain a second blood pressure waveform parameter when the first difference value is larger than a first threshold value.
Preferably, the step of sending a driving signal according to the amplitude and the frequency of the first blood pressure waveform parameter to drive the voice coil motor or the vibration exciter to work further includes:
according to the amplitude and the frequency of the first blood pressure waveform parameter, calculating an amplitude variation value in a range of a first time interval, sending a driving signal according to the amplitude variation value to drive a voice coil motor or a vibration exciter to work, and when the amplitude variation value is larger than an amplitude threshold value, sending a first driving signal to drive the voice coil motor to work; and when the amplitude variation value is smaller than the amplitude threshold value, sending a second driving signal to drive the vibration exciter to work.
Specifically, the calculating the amplitude variation value in the range of the first time interval according to the amplitude and the frequency of the first blood pressure waveform parameter includes:
Acquiring a frequency value f N at N time and a frequency value f M at M time, wherein N and M are positive integers and N < M, and the first time interval Then atThe change in the internal amplitude is R M-RN.
Specifically, the adjusting the first blood pressure waveform parameter to obtain a second blood pressure waveform parameter includes:
when the first difference value is larger than a first threshold value, the first difference value is compensated for the first blood pressure waveform parameter, and the second blood pressure waveform parameter is obtained.
Specifically, the method further comprises the following steps: and when the first difference value is smaller than a first threshold value, converting the second blood pressure waveform parameter into invasive waveform data to be used as analog waveform output of the invasive sphygmomanometer, and converting the second feedback signal into noninvasive waveform data to be used as analog waveform output of the noninvasive sphygmomanometer.
Specifically, the method further comprises the following steps: the voice coil motor and the vibration exciter are simultaneously arranged on a first moving platform, the voice coil motor or the vibration exciter can respectively and independently act on the first moving platform to enable the first moving platform to move forwards and backwards, the first moving platform is connected with the first hydraulic cylinder through the first connecting rod, and the first moving platform drives the first connecting rod to move forwards and backwards to apply pressure to liquid in the first hydraulic cylinder so as to simulate the change of human blood pressure; the stepping motor is arranged on the second moving platform, the stepping motor acts on the second moving platform to enable the second moving platform to move back and forth, the second moving platform is connected with the second hydraulic cylinder through the second connecting rod, and the second moving platform drives the back and forth movement of the second connecting rod to apply pressure to liquid in the second hydraulic cylinder so as to simulate the change of human blood pressure.
In one aspect, the present invention also provides a power simulation and calibration device of a blood pressure simulator, including:
the blood pressure waveform parameter receiving module is used for receiving a first blood pressure waveform parameter, wherein the first blood pressure waveform parameter is a preset blood pressure waveform parameter, and the first blood pressure waveform parameter comprises the type, the amplitude and the frequency of a blood pressure waveform;
the first driving module is used for calculating an amplitude variation value in a range of a first time interval according to the amplitude and the frequency of the first blood pressure waveform parameter, sending a driving signal according to the amplitude variation value, and driving a voice coil motor or a vibration exciter to work, wherein the voice coil motor or the vibration exciter is connected with a first hydraulic cylinder through a first connecting rod to drive liquid in the first hydraulic cylinder to vibrate;
The second driving module is used for driving the stepping motor to work according to the first blood pressure waveform parameters, and the stepping motor is connected with the second hydraulic cylinder through a second connecting rod to drive liquid in the second hydraulic cylinder to vibrate;
The feedback signal receiving module is used for receiving feedback signals, the feedback signals comprise a first feedback signal and a second feedback signal, the first feedback signal is generated by the pressure feedback module according to the vibration of liquid in the first hydraulic cylinder, the pressure feedback module is connected with the first hydraulic cylinder, the second feedback signal is generated by the vibration sensor according to the vibration of liquid in the second hydraulic cylinder, and the vibration sensor is positioned on the inner wall of the second hydraulic cylinder;
The blood pressure waveform parameter calibration module is used for calculating a first difference value between the first feedback signal and the second feedback signal, and when the first difference value is larger than a first threshold value, the first blood pressure waveform parameter is adjusted to obtain a second blood pressure waveform parameter.
Specifically, the method further comprises the following steps:
the motor selection module is used for sending a first driving signal to drive the voice coil motor to work when the amplitude variation value is larger than an amplitude threshold value; and when the amplitude variation value is smaller than the amplitude threshold value, sending a second driving signal to drive the vibration exciter to work.
In one aspect, the present invention also provides a power simulation and calibration system of a blood pressure simulator, including:
The device comprises an upper computer, a frame, a main control unit, a motor unit, a hydraulic cylinder unit and a pressure feedback unit, wherein the motor unit comprises a first motor unit and a second motor unit, the first motor unit comprises a voice coil motor, a vibration exciter, a first connecting rod and a first moving platform, the second motor unit comprises a stepping motor, a second connecting rod and a second moving platform, the hydraulic cylinder unit comprises a first hydraulic cylinder and a second hydraulic cylinder, the main control unit is respectively connected with the motor unit and the pressure feedback unit, the voice coil motor and the vibration exciter are connected with the first hydraulic cylinder through the first moving platform and the first connecting rod, the stepping motor is connected with the second hydraulic cylinder through the second moving platform and the second connecting rod, the first hydraulic cylinder is connected with the main control unit through the pressure feedback unit, and the main control unit realizes the method as described above.
Specifically, the second hydraulic cylinder includes: the vibration sensor is arranged between the cylinder body and the film wrapping the liquid and is used for measuring the vibration of the liquid film, and the vibration sensor is connected with the main control unit and sends the second feedback signal to the main control unit.
According to the power simulation and calibration method, device and system of the blood pressure simulator, the voice coil motor and the vibration exciter are used for switching to simulate the invasive arterial blood pressure waveform with high accuracy, meanwhile, the output of the voice coil motor and the output of the vibration exciter are calibrated through the output simulated by the stepping motor, the more precise and accurate invasive arterial blood pressure waveform is further simulated, in addition, the two paths of blood pressure simulation waveform signals which are output simultaneously can be respectively suitable for the simulated blood pressure of the invasive blood pressure meter and the noninvasive blood pressure meter, the application range of the product is improved, and meanwhile, the accuracy of the product is improved.
Drawings
FIG. 1 is a flow chart of a method for dynamic simulation and calibration of a blood pressure simulator;
FIG. 2 is a waveform diagram of arterial blood pressure;
FIG. 3 is a schematic diagram of a power simulation and calibration system for a blood pressure simulator.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
It should be understood that, in various embodiments of the present invention, the sequence number of each process does not mean that the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
It should be understood that in the present invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present invention, "plurality" means two or more. "and/or" is merely an association relationship describing an association object, and means that three relationships may exist, for example, and/or B may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. "comprising A, B and C", "comprising A, B, C" means that all three of A, B, C are comprised, "comprising A, B or C" means that one of A, B, C is comprised, "comprising A, B and/or C" means that any 1 or any 2 or 3 of A, B, C are comprised.
It should be understood that in the present invention, "B corresponding to a", "a corresponding to B", or "B corresponding to a" means that B is associated with a, from which B can be determined. Determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information. The matching of A and B is that the similarity of A and B is larger than or equal to a preset threshold value.
As used herein, the term "if" may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context.
The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Example 1
The invention provides a power simulation and calibration method of a blood pressure simulator, as shown in fig. 1, comprising the following steps:
Step S1, receiving a first blood pressure waveform parameter, wherein the first blood pressure waveform parameter is a preset blood pressure waveform parameter, and the first blood pressure waveform parameter comprises the type, the amplitude and the frequency of a blood pressure waveform;
step S2, sending a driving signal according to the amplitude and the frequency of the first blood pressure waveform parameter to drive one of a voice coil motor or a vibration exciter to work, wherein the voice coil motor or the vibration exciter is connected with a first hydraulic cylinder through a first connecting rod to drive liquid in the first hydraulic cylinder to vibrate;
step S3, driving a stepping motor to work according to the first blood pressure waveform parameter, wherein the stepping motor is connected with a second hydraulic cylinder through a second connecting rod to drive liquid in the second hydraulic cylinder to vibrate;
S4, receiving feedback signals, wherein the feedback signals comprise a first feedback signal and a second feedback signal, the first feedback signal is generated by a pressure feedback module according to liquid vibration in a first hydraulic cylinder, the pressure feedback module is connected with the first hydraulic cylinder, the second feedback signal is generated by a vibration sensor according to liquid vibration in a second hydraulic cylinder, and the vibration sensor is positioned on the inner wall of the second hydraulic cylinder;
and S5, calculating a first difference value of the first feedback signal and the second feedback signal, and adjusting the first blood pressure waveform parameter to obtain a second blood pressure waveform parameter when the first difference value is larger than a first threshold value.
It should be noted that, in the embodiment, the main control unit is used as a main body to describe the first blood pressure waveform parameter which is set by the user according to step S1, so that the blood pressure simulator simulates a waveform closer to the blood pressure of the human body to test the performance of the sphygmomanometer, and the blood pressure waveform parameter includes the type, the amplitude and the frequency of the blood pressure waveform. And then, according to the calculation of the feedback signal in the step S5, judging whether the output blood pressure waveform parameter needs to be adjusted, and if so, returning the output blood pressure waveform as a first blood pressure waveform parameter to the step S1 for cyclic operation until a satisfactory waveform signal is adjusted.
In the step 2, a voice coil motor or a vibration exciter is used as motor drive, in the existing invasive blood pressure simulator, basically, a stepping motor is used for simulating an invasive blood pressure waveform, the stepping motor is simple in design and convenient to use, and is widely used, but because the stepping motor is simple in structure and good for working in products with large torsion or low fineness, the problem that the driving signal sent by a main control unit is not timely and not high enough in fineness is always corresponding, the simulation of the blood pressure waveform needs to accurately simulate the blood pressure waveform of a human body, the closer to the blood pressure waveform of the human body, the more accurate the performance test of the later invasive blood pressure meter is, so that the voice coil motor and the vibration exciter with better response time are used for simulation operation. The voice coil motor and the vibration exciter are different in use points, the voice coil motor is more suitable for the requirements of low-frequency vibration and large amplitude, the vibration exciter is more suitable for the requirements of high-frequency vibration and small amplitude, as shown in fig. 2, the human blood pressure waveform is not in a complete sine wave state, and the descending section has a gentle vibration amplitude reduction, so that in order to better simulate the human blood pressure waveform, the voice coil motor or the vibration exciter is not singly selected to perform all simulation of the human blood pressure waveform, but is selected in a sectional mode, the voice coil motor is used for simulating a waveform area with large amplitude variation in the same time range, and the vibration exciter is used for simulating a waveform area with small amplitude variation in the same time range, so that the effect of better simulating the human blood pressure waveform is achieved. In this step, the blood pressure waveform of the invasive blood pressure meter is simulated so as to output an invasive blood pressure simulated waveform to the invasive blood pressure meter. Returning to the step, after the main control unit receives the first blood pressure waveform parameter of the upper computer, according to the amplitude and the frequency of the first blood pressure waveform parameter, judging which time period drives the voice coil motor to work and which time period drives the vibration exciter to work, wherein only the voice coil motor or the vibration exciter works singly but not simultaneously, and the main control unit needs to select the voice coil motor or the vibration exciter. The voice coil motor and the vibration exciter are connected with the first hydraulic cylinder through the first connecting rod, and after the main control unit drives one of the vibrators to work, the liquid in the first hydraulic cylinder can be driven to vibrate through the first connecting rod, so that the blood pressure waveform is simulated through the pressure of the liquid vibration.
In step S3, the main control unit additionally sends a set of driving signals to drive the stepper motor to work, the set of signals are different from the action in step S2, the action in step S2 is mainly to simulate the blood pressure waveform of the invasive sphygmomanometer, and the action in step S3 is two, one is to verify the waveform in step S2 through the signal simulated by the stepper motor, and the other is to simulate the blood pressure waveform of the noninvasive sphygmomanometer. For the first effect, the design is initially designed because although the voice coil motor and the vibration exciter can simulate a finer and more accurate blood pressure waveform, it is undeniable that the technology is mature when the stepping motor simulates a blood pressure waveform, particularly when the blood pressure waveform with larger amplitude is simulated, and the technology is simpler and more convenient to use than the voice coil motor and the vibration exciter, so that the voice coil motor and the vibration exciter show more excellent performance in rough simulation. For the second effect, for the noninvasive sphygmomanometer, the general simulation of the noninvasive blood pressure waveform is realized by simulating the pulse wave, and the design of the second hydraulic cylinder can be used for approximately simulating the blood pressure simulation waveform of the noninvasive sphygmomanometer, so that the effect of two purposes is achieved.
In step S4, the main control unit receives the feedback signal for calibrating the first blood pressure waveform parameter by using the second feedback signal, where the first feedback signal is a signal generated after the first blood pressure waveform parameter is simulated by the voice coil motor or the vibration exciter, and the calibration is for detecting whether the blood pressure waveform signal simulated by the voice coil motor or the vibration exciter is accurate or not due to errors of the signal possibly caused by some external factors such as the signal, the temperature, the humidity, and the like. The first feedback signal is generated by the vibration sensor in the second hydraulic cylinder according to the liquid vibration in the second hydraulic cylinder, the waveform signal generated by the vibration is input into the main control unit, and the main control unit simultaneously receives the feedback signals transmitted in the direction of the first hydraulic cylinder and the direction of the second hydraulic cylinder and then enters the operation of the step S5.
In step S5, the second feedback signal is used to calibrate the accuracy of the first feedback signal, since the inputs of both feedback signals are the same set of blood pressure waveform parameters, except for the type of motor experienced and the manner in which the waveform is generated. The voice coil motor and the stepping motor are excellent in simulation of large-amplitude waveforms, and the vibration exciter is excellent in simulation of small-amplitude waveforms, so that after a first difference value between a first feedback signal and a second feedback signal is calculated, a section of second blood pressure waveform parameters can be adjusted by using the first difference value, or only a part of the waveform parameters can be adjusted, namely only the part of the output waveform of the voice coil motor, which belongs to the second blood pressure waveform parameters, can be adjusted, and the waveform output by the part of the vibration exciter remains unadjusted.
Preferably, according to the amplitude and frequency of the first blood pressure waveform parameter, a driving signal is sent to drive the voice coil motor or the vibration exciter to work, and the method further comprises the following steps: according to the amplitude and the frequency of the first blood pressure waveform parameter, calculating an amplitude variation value in the range of a first time interval, sending a driving signal according to the amplitude variation value, driving a voice coil motor or a vibration exciter to work, and when the amplitude variation value is larger than an amplitude threshold value, sending a first driving signal to drive the voice coil motor to work; and when the amplitude variation value is smaller than the amplitude threshold value, sending a second driving signal to drive the vibration exciter to work.
Specifically, according to the amplitude and frequency of the first blood pressure waveform parameter, calculating the amplitude variation value in the range of the first time interval includes: acquiring a frequency value f N at N time and a frequency value f M at M time, wherein N and M are positive integers and N < M, and the first time intervalThen atThe change in the internal amplitude is the absolute value of R M-RN.
It should be noted that, as shown in fig. 2, the typical blood pressure waveform of the artery clinically is large in amplitude variation from 0s to 0.3s, small in amplitude variation from 0.3s to 0.9s, large in amplitude variation from 0.9s to 1.2s, small in amplitude variation from 1.2s to 1.8s, and so forth. The scheme is to simulate the waveform to be as close to the actual human blood pressure waveform as possible. In a preferred case, for example, the first time interval is set at 0.1s, and the voice coil motor or the exciter is used in the decision of the operation by the amplitude variation value within 0.1s, and since the voice coil motor is suitable for being used in the case of large amplitude variation, the voice coil motor is driven to operate at 0s to 0.3s, the exciter is driven to operate at 0.3s to 0.9s, the voice coil motor is driven to operate at 0.9s to 1.2s, and the exciter is driven to operate at 1.2s to 1.8s, thus cyclically. If the time interval is setIn the variation range of 0.1S at M time and 0.2S at N time, the amplitude corresponding to M time is 68P/mmHG, and the amplitude corresponding to N time is 105P/mmHG, ifThe change value of the internal amplitude is 37, and if the amplitude corresponding to the M moment is 80P/mmHG and the amplitude corresponding to the N moment is 85P/mmHG in the change range of 0.3s at the M moment and 0.4s at the N moment, the internal amplitude is the same as the internal amplitudeThe change value of the internal amplitude is 5, and the amplitude threshold value is set to 10 when the first time interval is set to 0.1s, which is obtained through a large number of calculations and experiments, and is explained by the above exampleWhen the change value of the internal amplitude is 37, the internal amplitude is larger than the amplitude threshold value 10, the main control unit sends a first driving signal to drive the voice coil motor to work at the moment, and when the voice coil motor is in the process ofWhen the change value of the internal amplitude is 5, the internal amplitude is smaller than the amplitude threshold value 10, and the main control unit sends a second driving model to drive the vibration exciter to work. Preferably, the judgment is performed by matching different amplitude thresholds according to the first time interval selected each time.
Specifically, adjusting the first blood pressure waveform parameter to obtain the second blood pressure waveform parameter includes:
When the first difference value is larger than the first threshold value, the first difference value is compensated to the first blood pressure waveform parameter, and the second blood pressure waveform parameter is obtained.
It should be noted that, as can be seen from the above description, the first difference is a difference between the first feedback signal and the second feedback signal, and the first feedback signal is generated by the exciter and the voice coil motor, so that in order to more accurately correct the analog waveform generated by the exciter and the voice coil motor through the first hydraulic cylinder, the analog waveform generated by the stepper motor through the first hydraulic cylinder needs to be compared with the analog waveform to perform the correction. When the difference between the two waveform parameters (mainly the change of the viewing amplitude) is relatively large, the main control unit calculates a first difference value, compensates the difference value to the first blood pressure waveform parameter input for the first time to obtain a second blood pressure waveform parameter, returns to the step S1, takes the second blood pressure waveform parameter as the first blood pressure waveform parameter to carry out second time input, judgment and correction, outputs the second blood pressure waveform parameter for the second time, the second time input also has a first feedback signal and a second feedback signal for the second time, the main control unit carries out calculation judgment and compensation again, if the first difference value for the second time is still larger than the first threshold value, continuously compensates the first difference value for the first blood pressure waveform parameter input for the second time, and continuously circulates until the main control unit calculates and judges that the first difference value for the second time is smaller than the first threshold value for the nth time, the output analog blood pressure waveform signal is the waveform signal with high precision.
Specifically, the method further comprises the following steps: when the first difference value is smaller than the first threshold value, the second blood pressure waveform parameter is converted into invasive waveform data to be output as an analog waveform of the invasive blood pressure meter, and the second feedback signal is converted into noninvasive waveform data to be output as an analog waveform of the noninvasive blood pressure meter.
It should be noted that when the first difference value is smaller than the first threshold value, the above steps are ended, and the main control unit converts the second blood pressure waveform parameter into the analog waveform of the invasive sphygmomanometer for outputting, where the second blood pressure waveform parameter may be the corrected second blood pressure waveform after the first input of the preset waveform parameter, after the processing of the voice coil motor or the vibration exciter, and the first hydraulic cylinder, or may be the corrected second blood pressure waveform obtained after the N times of correction of the multiple times of cyclic correction, which depends on the judgment of the first difference value. In addition, as can be seen from the above description, the scheme not only can simulate the simulated blood pressure waveform of the invasive sphygmomanometer, but also can simulate the simulated waveform of the noninvasive sphygmomanometer, the second feedback signal is the simulated waveform signal of the simulated noninvasive sphygmomanometer, and when the step is finished, the main control unit converts the second feedback signal into the simulated waveform of the noninvasive sphygmomanometer for outputting.
Specifically, the method further comprises the following steps: the voice coil motor and the vibration exciter are simultaneously arranged on the first moving platform, the voice coil motor or the vibration exciter can respectively and independently act on the first moving platform to enable the first moving platform to move back and forth, the first moving platform is connected with the first hydraulic cylinder through the first connecting rod, and the first moving platform drives the first connecting rod to move back and forth to apply pressure to liquid in the first hydraulic cylinder so as to simulate the change of human blood pressure; the stepping motor is arranged on the second moving platform, the stepping motor acts on the second moving platform to enable the second moving platform to move back and forth, the second moving platform is connected with the second hydraulic cylinder through the second connecting rod, and the second moving platform drives the back and forth movement of the second connecting rod to apply pressure to liquid in the second hydraulic cylinder so as to simulate the change of human blood pressure.
It should be noted that, the voice coil motor and the vibration exciter are installed on the first moving platform at the same time, one or two baffles are arranged on the moving platform, when one baffle is arranged on the platform, the voice coil motor and the vibration exciter are installed on the first moving platform side by side, and the two motors are designed next to one baffle in the moving direction, so that any motor is driven to drive the baffle to drive the first moving platform to move back and forth; when two baffles are arranged on the platform, the voice coil motor and the vibration exciter are respectively provided with the baffles, the two motors are respectively adjacent to the respective baffle designs in the motion direction, and thus, any motor is driven to drive the baffles so as to drive the first motion platform to move back and forth. Similarly, the stepping motor is also installed on the second motion platform like the voice coil motor and the vibration exciter, and the stepping motor is also designed to be close to a baffle in the motion direction, and the baffle is driven by the driving of the stepping motor so as to drive the second motion platform to move back and forth.
According to the power simulation and calibration method of the blood pressure simulator, the voice coil motor and the vibration exciter are used in a switching mode to simulate the invasive arterial blood pressure waveform with high accuracy, meanwhile, the output of the voice coil motor and the output of the vibration exciter are calibrated through the output simulated by the stepping motor, the more precise and accurate invasive arterial blood pressure waveform is further simulated, in addition, the two paths of blood pressure simulation waveform signals which are output simultaneously can be respectively suitable for the simulated blood pressure of the invasive blood pressure meter and the noninvasive blood pressure meter, the application range of the product is improved, and meanwhile, the accuracy of the product is improved.
Example two
The invention also provides a power simulation and calibration device of the blood pressure simulator, which comprises:
The blood pressure waveform parameter receiving module is used for receiving a first blood pressure waveform parameter, wherein the first blood pressure waveform parameter is a preset blood pressure waveform parameter, and the first blood pressure waveform parameter comprises the type, the amplitude and the frequency of a blood pressure waveform;
The first driving module is used for calculating an amplitude variation value in a range of a first time interval according to the amplitude and the frequency of the first blood pressure waveform parameter, sending a driving signal according to the amplitude variation value, and driving a voice coil motor or a vibration exciter to work, wherein the voice coil motor or the vibration exciter is connected with a first hydraulic cylinder through a first connecting rod to drive liquid in the first hydraulic cylinder to vibrate;
the second driving module is used for driving the stepping motor to work according to the first blood pressure waveform parameter, and the stepping motor is connected with the second hydraulic cylinder through the second connecting rod to drive liquid in the second hydraulic cylinder to vibrate;
The feedback signal receiving module is used for receiving feedback signals, the feedback signals comprise a first feedback signal and a second feedback signal, the first feedback signal is generated by the pressure feedback module according to the liquid vibration in the first hydraulic cylinder, the pressure feedback module is connected with the first hydraulic cylinder, the second feedback signal is generated by the vibration sensor according to the liquid vibration in the second hydraulic cylinder, and the vibration sensor is positioned on the inner wall of the second hydraulic cylinder;
The blood pressure waveform parameter calibration module is used for calculating a first difference value between the first feedback signal and the second feedback signal, and when the first difference value is larger than a first threshold value, the first blood pressure waveform parameter is adjusted to obtain a second blood pressure waveform parameter.
It should be noted that, for the blood pressure waveform parameter receiving module, the first blood pressure waveform parameter sent for the first time is a preset blood pressure waveform parameter set by the user, so that the blood pressure simulator simulates a waveform closer to the blood pressure of the human body to test the performance of the sphygmomanometer, and the blood pressure waveform parameter includes the type, amplitude and frequency of the blood pressure waveform. And calculating the feedback signal by the blood pressure waveform parameter calibration module, judging whether the output blood pressure waveform parameter needs to be adjusted, and if so, returning the output blood pressure waveform as a first blood pressure waveform parameter to the blood pressure waveform parameter receiving module for cyclic operation until a satisfactory waveform signal is adjusted.
Aiming at the first driving module, a voice coil motor or a vibration exciter is used as motor driving, in the existing invasive blood pressure simulator, a stepping motor is basically used for simulating an invasive blood pressure waveform, the stepping motor is simple in design and convenient to use and is widely used, but because the stepping motor is simple in structure and good for working in products with large torsion or low fineness, the problem that the driving signal sent by a main control unit is not timely and fine enough is always corresponding, the simulation of the blood pressure waveform needs to accurately simulate the blood pressure waveform of a human body, the closer to the blood pressure waveform of the human body, the more accurate the performance test of the later invasive blood pressure meter is, so that the voice coil motor and the vibration exciter with better response time are used for simulation operation. The voice coil motor and the vibration exciter are different in use points, the voice coil motor is more suitable for the requirements of low-frequency vibration and large amplitude, the vibration exciter is more suitable for the requirements of high-frequency vibration and small amplitude, as shown in fig. 2, the human blood pressure waveform is not in a complete sine wave state, and the descending section has a gentle vibration amplitude reduction, so that in order to better simulate the human blood pressure waveform, the voice coil motor or the vibration exciter is not singly selected to perform all simulation of the human blood pressure waveform, but is selected in a sectional mode, the voice coil motor is used for simulating a waveform area with large amplitude variation in the same time range, and the vibration exciter is used for simulating a waveform area with small amplitude variation in the same time range, so that the effect of better simulating the human blood pressure waveform is achieved. In this step, the blood pressure waveform of the invasive blood pressure meter is simulated so as to output an invasive blood pressure simulated waveform to the invasive blood pressure meter. Returning to the module, after receiving the first blood pressure waveform parameter of the upper computer, the main control unit judges which time period drives the voice coil motor to work and which time period drives the vibration exciter to work according to the amplitude and the frequency of the first blood pressure waveform parameter, and only the voice coil motor or the vibration exciter works singly but not two simultaneously in the same time period, and the main control unit selects the voice coil motor or the vibration exciter. The voice coil motor and the vibration exciter are connected with the first hydraulic cylinder through the first connecting rod, and after the main control unit drives one of the vibrators to work, the liquid in the first hydraulic cylinder can be driven to vibrate through the first connecting rod, so that the blood pressure waveform is simulated through the pressure of the liquid vibration.
The main control unit sends out a group of driving signals to the second driving module in addition to drive the stepping motor to work, the group of signals are different from the first driving module in action, the first driving module mainly aims at simulating the blood pressure waveform of the invasive sphygmomanometer, the second driving module has two actions, one action aims at verifying the waveform generated by the first hydraulic cylinder subsequently through the signals simulated by the stepping motor, and the other action aims at simulating the blood pressure waveform of the noninvasive sphygmomanometer. For the first effect, the design is initially designed because although the voice coil motor and the vibration exciter can simulate a finer and more accurate blood pressure waveform, it is undeniable that the technology is mature when the stepping motor simulates a blood pressure waveform, particularly when the blood pressure waveform with larger amplitude is simulated, and the technology is simpler and more convenient to use than the voice coil motor and the vibration exciter, so that the voice coil motor and the vibration exciter show more excellent performance in rough simulation. For the second effect, for the noninvasive sphygmomanometer, the general simulation of the noninvasive blood pressure waveform is realized by simulating the pulse wave, and the design of the second hydraulic cylinder can be used for approximately simulating the blood pressure simulation waveform of the noninvasive sphygmomanometer, so that the effect of two purposes is achieved.
For the feedback signal receiving module, the main control unit receives the feedback signal for calibrating the first blood pressure waveform parameter by using the second feedback signal, wherein the first feedback signal is a signal generated after the first blood pressure waveform parameter is simulated by the voice coil motor or the vibration exciter, and the aim of calibration is to detect whether the blood pressure waveform signal simulated by the voice coil motor or the vibration exciter is accurate or not because some external factors such as the signal, the temperature, the humidity and the like possibly cause errors of the signal. The first feedback signal is generated by the vibration sensor in the second hydraulic cylinder according to the liquid vibration in the second hydraulic cylinder, the waveform signal generated by the vibration is input into the main control unit, and the main control unit simultaneously receives the feedback signals transmitted in the direction of the first hydraulic cylinder and the direction of the second hydraulic cylinder and then enters the operation of the blood pressure waveform parameter calibration module.
For the blood pressure waveform eucalyptus calibration module, the second feedback signal is used for calibrating the accuracy of the first feedback signal, and as the input of the two feedback signals is the same set of blood pressure waveform parameters, the difference is the type of motor and the waveform generation mode. The voice coil motor and the stepping motor are excellent in simulation of large-amplitude waveforms, and the vibration exciter is excellent in simulation of small-amplitude waveforms, so that after a first difference value between a first feedback signal and a second feedback signal is calculated, a section of second blood pressure waveform parameters can be adjusted by using the first difference value, or only a part of the waveform parameters can be adjusted, namely only the part of the output waveform of the voice coil motor, which belongs to the second blood pressure waveform parameters, can be adjusted, and the waveform output by the part of the vibration exciter remains unadjusted.
The power simulation and calibration device of the blood pressure simulator of the embodiment further comprises: the motor selection module is used for sending a first driving signal to drive the voice coil motor to work when the amplitude variation value is larger than the amplitude threshold value; and when the amplitude variation value is smaller than the amplitude threshold value, sending a second driving signal to drive the vibration exciter to work. According to the amplitude and frequency of the first blood pressure waveform parameter, calculating the amplitude variation value in the range of the first time interval comprises: acquiring a frequency value f N at N time and a frequency value f M at M time, wherein N and M are positive integers and N < M, and the first time intervalThen atThe change in the internal amplitude is the absolute value of R M-RN.
It should be noted that, as shown in fig. 2, the typical blood pressure waveform of the artery clinically is large in amplitude variation from 0s to 0.3s, small in amplitude variation from 0.3s to 0.9s, large in amplitude variation from 0.9s to 1.2s, small in amplitude variation from 1.2s to 1.8s, and so forth. The scheme is to simulate the waveform to be as close to the actual human blood pressure waveform as possible. In a preferred case, for example, the first time interval is set at 0.1s, and the voice coil motor or the exciter is used in the decision of the operation by the amplitude variation value within 0.1s, and since the voice coil motor is suitable for being used in the case of large amplitude variation, the voice coil motor is driven to operate at 0s to 0.3s, the exciter is driven to operate at 0.3s to 0.9s, the voice coil motor is driven to operate at 0.9s to 1.2s, and the exciter is driven to operate at 1.2s to 1.8s, thus cyclically. If the time interval is setIn the variation range of 0.1S at M time and 0.2S at N time, the amplitude corresponding to M time is 68P/mmHG, and the amplitude corresponding to N time is 105P/mmHG, ifThe change value of the internal amplitude is 37, and if the amplitude corresponding to the M moment is 80P/mmHG and the amplitude corresponding to the N moment is 85P/mmHG in the change range of 0.3s at the M moment and 0.4s at the N moment, the internal amplitude is the same as the internal amplitudeThe change value of the internal amplitude is 5, and the amplitude threshold value is set to 10 when the first time interval is set to 0.1s, which is obtained through a large number of calculations and experiments, and is explained by the above exampleWhen the change value of the internal amplitude is 37, the internal amplitude is larger than the amplitude threshold value 10, the main control unit sends a first driving signal to drive the voice coil motor to work at the moment, and when the voice coil motor is in the process ofWhen the change value of the internal amplitude is 5, the internal amplitude is smaller than the amplitude threshold value 10, and the main control unit sends a second driving model to drive the vibration exciter to work. Preferably, the judgment is performed by matching different amplitude thresholds according to the first time interval selected each time.
The blood pressure waveform parameter calibration module specifically realizes the calibration of blood pressure waveform parameters by the following modes: when the first difference value is larger than the first threshold value, the first difference value is compensated to the first blood pressure waveform parameter, and the second blood pressure waveform parameter is obtained.
It should be noted that, as can be seen from the above description, the first difference is a difference between the first feedback signal and the second feedback signal, and the first feedback signal is generated by the exciter and the voice coil motor, so that in order to more accurately correct the analog waveform generated by the exciter and the voice coil motor through the first hydraulic cylinder, the analog waveform generated by the stepper motor through the first hydraulic cylinder needs to be compared with the analog waveform to perform the correction. When the difference between the two waveform parameters (mainly the change of the viewing amplitude) is relatively large, the main control unit calculates a first difference value, compensates the difference value to the first blood pressure waveform parameter input for the first time to obtain a second blood pressure waveform parameter, returns to the blood pressure waveform parameter receiving module, takes the second blood pressure waveform parameter as the first blood pressure waveform parameter to carry out second time input, judgment and correction, then outputs the second blood pressure waveform parameter for the second time, the second time input also has a first feedback signal and a second feedback signal for the second time, the main control unit carries out calculation judgment and compensation again, if the first difference value for the second time is still larger than the first threshold value, continuously circulates until the main control unit calculates and judges that the first difference value for the second time is smaller than the first threshold value for the second time, and the output analog blood pressure waveform signal is the waveform signal with high accuracy.
Specifically, the apparatus of this embodiment further includes an analog waveform output module: when the first difference value is smaller than the first threshold value, the second blood pressure waveform parameter is converted into invasive waveform data to be output as an analog waveform of the invasive blood pressure meter, and the second feedback signal is converted into noninvasive waveform data to be output as an analog waveform of the noninvasive blood pressure meter.
It should be noted that when the first difference value is smaller than the first threshold value, the above steps are ended, and the main control unit converts the second blood pressure waveform parameter into the analog waveform of the invasive sphygmomanometer for outputting, where the second blood pressure waveform parameter may be the corrected second blood pressure waveform after the first input of the preset waveform parameter, after the processing of the voice coil motor or the vibration exciter, and the first hydraulic cylinder, or may be the corrected second blood pressure waveform obtained after the N times of correction of the multiple times of cyclic correction, which depends on the judgment of the first difference value. In addition, as can be seen from the above description, the scheme not only can simulate the simulated blood pressure waveform of the invasive sphygmomanometer, but also can simulate the simulated waveform of the noninvasive sphygmomanometer, the second feedback signal is the simulated waveform signal of the simulated noninvasive sphygmomanometer, and when the calibration is finished, the main control unit converts the second feedback signal into the simulated waveform of the noninvasive sphygmomanometer for output.
Through the power simulation and calibration device of the blood pressure simulator of the embodiment, the voice coil motor and the vibration exciter are used for simulating the invasive arterial blood pressure waveform with high accuracy through switching, meanwhile, the output of the voice coil motor and the vibration exciter is calibrated through the output simulated by the stepping motor, the more precise and accurate invasive arterial blood pressure waveform is further simulated, in addition, the two paths of blood pressure simulation waveform signals which are simultaneously output can be respectively suitable for the simulated blood pressure of the invasive blood pressure meter and the noninvasive blood pressure meter, the application range of the product is improved, and meanwhile, the accuracy of the product is increased.
Example III
The invention also provides a power simulation and calibration system of the blood pressure simulator, which comprises:
The method comprises the steps that an upper computer, a frame, a main control unit, a motor unit, a hydraulic cylinder unit and a pressure feedback unit are arranged, the motor unit comprises a first motor unit and a second motor unit, the first motor unit comprises a voice coil motor, a vibration exciter, a first connecting rod and a first motion platform, the second motor unit comprises a stepping motor, a second connecting rod and a second motion platform, the hydraulic cylinder unit comprises a first hydraulic cylinder and a second hydraulic cylinder, the main control unit is respectively connected with the motor unit and the pressure feedback unit, the voice coil motor and the vibration exciter are connected with the first hydraulic cylinder through the first motion platform and the first connecting rod, the stepping motor is connected with the second hydraulic cylinder through the second motion platform and the second connecting rod, the first hydraulic cylinder is connected with the main control unit through the pressure feedback unit, and the main control unit realizes the first embodiment.
Specifically, the second hydraulic cylinder includes: the vibration sensor is arranged between the cylinder body and the film wrapping the liquid and is used for measuring the vibration of the liquid film, and the vibration sensor is connected with the main control unit and sends a second feedback signal to the main control unit.
It should be noted that, as shown in fig. 3, a connection schematic diagram of a power simulation and calibration system of a blood pressure simulator is shown, the connection manner is as described above, wherein the voice coil motor, the vibration exciter, the first connecting rod, the first motion platform and the first hydraulic cylinder are used for implementing the method of step S2 in the first embodiment, the step motor, the second connecting rod, the second motion platform and the second hydraulic cylinder are used for implementing the method of step S3 in the first embodiment, and the main control unit is used as a whole to implement the functions of operation, comparison, adjustment and output of the whole system.
In addition, for the second hydraulic cylinder, the pulse wave is measured for the noninvasive sphygmomanometer, the liquid in the second hydraulic cylinder can simulate human blood, the film wrapping the liquid simulates blood vessels, the main control unit drives the stepping motor to move so as to promote the blood to generate pressure to vibrate, the vibration is reflected by the film wrapping the liquid, the vibration sensor is arranged between the cylinder body and the film, so that the vibration condition of the liquid reflected by the film is captured, the pulse wave is simulated, and the signal of the vibration sensor is directly output to the noninvasive sphygmomanometer as a simulated blood pressure waveform.
Through the power simulation and calibration system of the blood pressure simulator of the embodiment, the voice coil motor and the vibration exciter are used for simulating the invasive arterial blood pressure waveform with high accuracy through switching, meanwhile, the output of the voice coil motor and the vibration exciter is calibrated through the output simulated by the stepping motor, the more precise and accurate invasive arterial blood pressure waveform is further simulated, in addition, the two paths of blood pressure simulation waveform signals which are simultaneously output can be respectively suitable for the simulated blood pressure of the invasive blood pressure meter and the noninvasive blood pressure meter, the application range of the product is improved, and meanwhile, the accuracy of the product is increased.
Example IV
The present invention also provides a readable storage medium including a stored program module, the stored program module being executable in a processor to implement a method as in the first embodiment.
The readable storage medium stores a computer program which, when executed by a processor, is adapted to carry out the method provided in the first embodiment described above.
The readable storage medium may be a computer storage medium or a communication medium. Communication media includes any medium that facilitates transfer of a computer program from one place to another. Computer storage media can be any available media that can be accessed by a general purpose or special purpose computer. For example, a readable storage medium is coupled to the processor such that the processor can read information from, and write information to, the readable storage medium. In the alternative, the readable storage medium may be integral to the processor. The processor and the readable storage medium may reside in an Application SPECIFIC INTEGRATED Circuits (ASIC). In addition, the ASIC may reside in a user device. The processor and the readable storage medium may reside as discrete components in a communication device. The readable storage medium may be read-only memory (ROM), random-access memory (RAM), CD-ROMs, magnetic tape, floppy disk, optical data storage device, etc.
The present invention also provides a program product comprising execution instructions stored in a readable storage medium. The at least one processor of the device may read the execution instructions from the readable storage medium, the execution instructions being executed by the at least one processor to cause the device to implement the methods provided by the various embodiments described above.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A method for dynamic simulation and calibration of a blood pressure simulator, comprising:
Receiving a first blood pressure waveform parameter, wherein the first blood pressure waveform parameter is a preset blood pressure waveform parameter, and the first blood pressure waveform parameter comprises the type, amplitude and frequency of a blood pressure waveform;
according to the amplitude and the frequency of the first blood pressure waveform parameter, a driving signal is sent to drive a voice coil motor or a vibration exciter to work, and the voice coil motor or the vibration exciter is connected with a first hydraulic cylinder through a first connecting rod to drive liquid in the first hydraulic cylinder to vibrate;
driving a stepping motor to work according to the first blood pressure waveform parameters, wherein the stepping motor is connected with a second hydraulic cylinder through a second connecting rod to drive liquid in the second hydraulic cylinder to vibrate;
Receiving feedback signals, wherein the feedback signals comprise a first feedback signal and a second feedback signal, the first feedback signal is generated by a pressure feedback module according to liquid vibration in a first hydraulic cylinder, the pressure feedback module is connected with the first hydraulic cylinder, the second feedback signal is generated by a vibration sensor according to liquid vibration in a second hydraulic cylinder, and the vibration sensor is positioned on the inner wall of the second hydraulic cylinder;
And calculating a first difference value between the first feedback signal and the second feedback signal, and adjusting the first blood pressure waveform parameter to obtain a second blood pressure waveform parameter when the first difference value is larger than a first threshold value.
2. The method for power simulation and calibration of a blood pressure simulator according to claim 1, wherein the step of sending a driving signal to drive a voice coil motor or a vibration exciter according to the amplitude and frequency of the first blood pressure waveform parameter further comprises:
according to the amplitude and the frequency of the first blood pressure waveform parameter, calculating an amplitude variation value in a range of a first time interval, sending a driving signal according to the amplitude variation value to drive a voice coil motor or a vibration exciter to work, and when the amplitude variation value is larger than an amplitude threshold value, sending a first driving signal to drive the voice coil motor to work; and when the amplitude variation value is smaller than the amplitude threshold value, sending a second driving signal to drive the vibration exciter to work.
3. The method for dynamic simulation and calibration of a blood pressure simulator as claimed in claim 2, wherein calculating the amplitude variation value within the range of the first time interval according to the amplitude and frequency of the first blood pressure waveform parameter comprises:
Acquiring a frequency value f N at N time and a frequency value f M at M time, wherein N and M are positive integers and N < M, and the first time interval Then atThe change in the internal amplitude is the absolute value of R M-RN.
4. The method for dynamic simulation and calibration of a blood pressure simulator of claim 1, wherein said adjusting said first blood pressure waveform parameters to obtain second blood pressure waveform parameters comprises:
when the first difference value is larger than a first threshold value, the first difference value is compensated for the first blood pressure waveform parameter, and the second blood pressure waveform parameter is obtained.
5. The method for dynamic simulation and calibration of a blood pressure simulator of any one of claims 1-4, further comprising:
And when the first difference value is smaller than a first threshold value, converting the second blood pressure waveform parameter into invasive waveform data to be used as analog waveform output of the invasive sphygmomanometer, and converting the second feedback signal into noninvasive waveform data to be used as analog waveform output of the noninvasive sphygmomanometer.
6. The method for dynamic simulation and calibration of a blood pressure simulator of claim 5, comprising:
The voice coil motor and the vibration exciter are simultaneously arranged on a first moving platform, the voice coil motor or the vibration exciter can respectively and independently act on the first moving platform to enable the first moving platform to move forwards and backwards, the first moving platform is connected with the first hydraulic cylinder through the first connecting rod, and the first moving platform drives the first connecting rod to move forwards and backwards to apply pressure to liquid in the first hydraulic cylinder so as to simulate the change of human blood pressure; the stepping motor is arranged on the second moving platform, the stepping motor acts on the second moving platform to enable the second moving platform to move back and forth, the second moving platform is connected with the second hydraulic cylinder through the second connecting rod, and the second moving platform drives the back and forth movement of the second connecting rod to apply pressure to liquid in the second hydraulic cylinder so as to simulate the change of human blood pressure.
7. A power simulation and calibration device for a blood pressure simulator, comprising:
the blood pressure waveform parameter receiving module is used for receiving a first blood pressure waveform parameter, wherein the first blood pressure waveform parameter is a preset blood pressure waveform parameter, and the first blood pressure waveform parameter comprises the type, the amplitude and the frequency of a blood pressure waveform;
the first driving module is used for calculating an amplitude variation value in a range of a first time interval according to the amplitude and the frequency of the first blood pressure waveform parameter, sending a driving signal according to the amplitude variation value, and driving a voice coil motor or a vibration exciter to work, wherein the voice coil motor or the vibration exciter is connected with a first hydraulic cylinder through a first connecting rod to drive liquid in the first hydraulic cylinder to vibrate;
The second driving module is used for driving the stepping motor to work according to the first blood pressure waveform parameters, and the stepping motor is connected with the second hydraulic cylinder through a second connecting rod to drive liquid in the second hydraulic cylinder to vibrate;
The feedback signal receiving module is used for receiving feedback signals, the feedback signals comprise a first feedback signal and a second feedback signal, the first feedback signal is generated by the pressure feedback module according to the vibration of liquid in the first hydraulic cylinder, the pressure feedback module is connected with the first hydraulic cylinder, the second feedback signal is generated by the vibration sensor according to the vibration of liquid in the second hydraulic cylinder, and the vibration sensor is positioned on the inner wall of the second hydraulic cylinder;
The blood pressure waveform parameter calibration module is used for calculating a first difference value between the first feedback signal and the second feedback signal, and when the first difference value is larger than a first threshold value, the first blood pressure waveform parameter is adjusted to obtain a second blood pressure waveform parameter.
8. The power simulation and calibration apparatus of a blood pressure simulator of claim 7, further comprising:
the motor selection module is used for sending a first driving signal to drive the voice coil motor to work when the amplitude variation value is larger than an amplitude threshold value; and when the amplitude variation value is smaller than the amplitude threshold value, sending a second driving signal to drive the vibration exciter to work.
9. A power simulation and calibration system for a blood pressure simulator, comprising:
The device comprises an upper computer, a frame, a main control unit, a motor unit, a hydraulic cylinder unit and a pressure feedback unit, wherein the motor unit comprises a first motor unit and a second motor unit, the first motor unit comprises a voice coil motor, a vibration exciter, a first connecting rod and a first moving platform, the second motor unit comprises a stepping motor, a second connecting rod and a second moving platform, the hydraulic cylinder unit comprises a first hydraulic cylinder and a second hydraulic cylinder, the main control unit is respectively connected with the motor unit and the pressure feedback unit, the voice coil motor and the vibration exciter are connected with the first hydraulic cylinder through the first moving platform and the first connecting rod, the stepping motor is connected with the second hydraulic cylinder through the second moving platform and the second connecting rod, the first hydraulic cylinder is connected with the main control unit through the pressure feedback unit, and the main control unit realizes the method according to any one of claims 1-6.
10. The power simulation and calibration system of a blood pressure simulator of claim 9, wherein the second hydraulic cylinder comprises: the vibration sensor is arranged between the cylinder body and the film wrapping the liquid and is used for measuring the vibration of the liquid film, and the vibration sensor is connected with the main control unit and sends the second feedback signal to the main control unit.
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