CN209947132U - Hydraulic simulation device - Google Patents
Hydraulic simulation device Download PDFInfo
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- CN209947132U CN209947132U CN201920395133.1U CN201920395133U CN209947132U CN 209947132 U CN209947132 U CN 209947132U CN 201920395133 U CN201920395133 U CN 201920395133U CN 209947132 U CN209947132 U CN 209947132U
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Abstract
The utility model discloses a hydraulic simulation device, which comprises an automatic water injection module, a hydraulic chamber, a hydraulic simulation module, a pressure sensor and a main control module; the automatic water injection module is used for injecting water into the hydraulic chamber; the hydraulic simulation module is used for applying pressure to the hydraulic chamber; the output end of the pressure sensor is connected with the input end of the main control module and used for collecting the pressure of the hydraulic chamber and sending the pressure to the main control module; the output end of the main control module is connected with the input end of the hydraulic simulation module, and the output end of the main control module is also connected with the input end of the automatic water injection module. The hydraulic simulation device of the utility model automatically injects water into the hydraulic chamber through the automatic water injection device, thereby overcoming the technical problem of inaccurate simulation caused by reserving bubbles by manual water injection in the prior art; the automatic water injection device can also automatically drain water, and negative effects of accumulated water on the hydraulic simulation device are effectively prevented.
Description
Technical Field
The utility model belongs to the technical field of hydraulic pressure simulation and specifically relates to a hydraulic pressure simulation device is related to.
Background
Blood Pressure (BP) refers to the lateral pressure acting on a unit area of a blood vessel wall when blood flows in the blood vessel, which is the driving force for pushing the blood to flow in the blood vessel, and the measurement method of blood pressure comprises an indirect measurement method and a direct measurement method, wherein the indirect measurement method is a cuff pressurization method, which is measured by a sphygmomanometer, the indirect measurement method is simple and easy, and is a method widely applied in clinic at present, ② direct measurement method is a method that a long catheter dissolved with anticoagulant is punctured by skin to deliver the catheter to the aorta, and the catheter is connected with a pressure sensor, so that the pressure in the blood vessel is transferred to an external pressure sensor through liquid in the catheter due to the pressure transfer function of fluid, and a dynamic waveform of real-time pressure change in the blood vessel can be obtained.
The existing part of invasive blood pressure simulators use a loudspeaker or a motor to drive and generate hydraulic pressure to simulate the change of arterial blood pressure of a human body, and the following problems are mainly caused: firstly, the frequency response of the simulator is not far greater than the natural frequency of the tested sensor system, namely, the output amplitude of the simulator is attenuated to different degrees in the frequency response high-frequency part of the tested sensor system; secondly, the simulator is manually injected with water, bubbles are retained in the pressure cavity to different degrees, and the compression ratio of gas under pressure is far greater than that of liquid, so that the simulation accuracy is influenced; thirdly, through manual drainage action to the simulator system, liquid is kept in the pressure chamber body to different degrees, bacteria can breed for a long time, impurity is produced, the liquid path is blocked, and negative influence can be produced to piston structure or pressure sensor.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model aims to provide a hydraulic pressure simulator which can simulate the change of the arterial blood pressure of a human body.
The utility model adopts the technical proposal that: a hydraulic simulation device comprises an automatic water injection module, a hydraulic chamber, a hydraulic simulation module, a pressure sensor and a main control module;
the automatic water injection module is used for injecting water into the hydraulic chamber;
the hydraulic simulation module is used for applying pressure to the hydraulic chamber;
the output end of the pressure sensor is connected with the input end of the main control module and used for collecting the pressure of the hydraulic chamber and sending the pressure to the main control module;
the output end of the main control module is connected with the input end of the hydraulic simulation module, and the output end of the main control module is also connected with the input end of the automatic water injection module.
Preferably, the automatic water injection module comprises a bidirectional liquid pump, an output end of the main control module is connected with an input end of the bidirectional liquid pump, and the bidirectional liquid pump is connected with the hydraulic chamber.
Preferably, the hydraulic chamber further comprises a water outlet.
Preferably, the hydraulic pressure simulation module comprises a static pressure simulation module and a dynamic pressure simulation module;
the static pressure simulation module comprises a stepping motor, a spiral feeding mechanism and an injector which are sequentially connected, wherein a needle head of the injector is connected with the hydraulic chamber, and an input end of the stepping motor is connected with an output end of the main control module;
the dynamic die simulation module comprises a vibration exciter, a connecting rod and a piston which are sequentially connected, the piston is connected with the hydraulic chamber, and the input end of the vibration exciter is connected with the output end of the master control module.
Preferably, the hydraulic simulation device further comprises a measured sensor interface, and the measured sensor interface is used for connecting a measured sensor system.
Preferably, the frequency of the exciter is greater than the natural frequency of the sensor system under test.
Preferably, the hydraulic chamber further comprises a ground screw.
The utility model has the advantages that:
the hydraulic simulation device of the utility model automatically injects water into the hydraulic chamber through the automatic water injection device, thereby overcoming the technical problem of inaccurate simulation caused by reserving bubbles by manual water injection in the prior art; the automatic water injection device can also automatically drain water, and negative effects of accumulated water on the hydraulic simulation device are effectively prevented.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a hydraulic simulation apparatus according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The utility model provides a hydraulic simulation device, which comprises an automatic water injection module, a hydraulic chamber, a hydraulic simulation module, a pressure sensor and a main control module;
the automatic water injection module is used for injecting water into the hydraulic chamber;
the hydraulic simulation module is used for applying pressure to the hydraulic chamber;
the output end of the pressure sensor is connected with the input end of the main control module and used for collecting the pressure of the hydraulic chamber and sending the pressure to the main control module;
the output end of the main control module is connected with the input end of the hydraulic simulation module, and the output end of the main control module is also connected with the input end of the automatic water injection module.
The hydraulic simulation device is characterized in that the control module controls the automatic water injection module to inject water into the hydraulic chamber, the hydraulic simulation module applies pressure to the hydraulic chamber, the pressure sensor collects the pressure of the hydraulic chamber and sends the pressure to the main control module, the main control module sends a feedback control signal to the hydraulic simulation module according to the pressure of the hydraulic chamber, and the hydraulic simulation module receives the feedback control signal and applies pressure to the hydraulic chamber according to the feedback control signal, so that the change state of the blood pressure of a human body is simulated by using the water pressure.
Fig. 1 is a schematic structural diagram of a hydraulic simulation apparatus according to an embodiment of the present invention. In this embodiment, the automatic water injection module includes a bidirectional liquid pump, an output end of the main control module is connected with an input end of the bidirectional liquid pump, and the bidirectional liquid pump is connected with the hydraulic chamber. The top of the hydraulic chamber is provided with a water outlet. The two-way liquid pump can realize the automatic water injection to the hydraulic pressure room on the one hand, utilizes the principle of gaseous come-up in liquid, and gaseous delivery port discharge that passes through effectively stops the indoor bubble of hydraulic pressure, has avoided the influence that the bubble brought to the simulation process. On the other hand, the two-way liquid pump can realize automatic drainage, and the suction effect of the two-way liquid pump effectively reduces the possibility of accumulated water in the hydraulic chamber, thereby avoiding the accumulated water from breeding bacteria, generating impurities and blocking a liquid path to generate negative effects on the piston or the pressure sensor. After the hydraulic chamber is filled with distilled water, a pressure value required by simulation can be set through a human-computer interface.
In this embodiment, the hydraulic pressure simulation module includes a static pressure simulation module and a dynamic pressure simulation module.
The static pressure simulation module comprises a stepping motor, a spiral feeding mechanism and an injector which are connected in sequence. The input end of the stepping motor is connected with the output end of the main control module to receive the feedback control signal. The stepping motor drives the screw feeding mechanism to screw feed towards the hydraulic chamber, so as to push the injector, and the needle head of the injector is connected with the hydraulic chamber, so that static pressure is applied to the hydraulic chamber. The pressure sensor collects the pressure of the hydraulic chamber and sends the pressure to the control module, the control module sends a feedback control signal according to the pressure of the hydraulic chamber, and the input end of the stepping motor is subjected to feedback control, so that the pressure in the hydraulic chamber can quickly reach a set static pressure value.
The dynamic die simulation module comprises a vibration exciter, a connecting rod and a piston which are sequentially connected. The input end of the vibration exciter is connected with the output end of the main control module to receive a feedback control signal, and the piston is connected with the hydraulic chamber. The vibration exciter drives the piston to generate dynamic pressure through the connecting rod. The pressure sensor collects the pressure of the hydraulic chamber and sends the pressure to the control module, the control module sends a feedback control signal according to the pressure of the hydraulic chamber, the input end of the vibration exciter is fed back and controlled, the vibration amplitude of the vibration exciter is continuously adjusted, and therefore the dynamic pressure with the set dynamic pressure fluctuation amplitude is output. The dynamic pressure value is finally converted into an electric signal and is transmitted to display equipment such as a monitor and the like through a cable for displaying.
In this embodiment, the hydraulic simulation apparatus further includes a measured sensor interface, and the measured sensor interface is used to connect to a measured sensor system. The sensor system to be tested comprises a device to be tested such as a monitor.
In this embodiment, the frequency of the vibration exciter is generally set to be much greater than the natural frequency of the sensor system to be tested, that is, the output amplitude of the vibration exciter remains unchanged within the frequency range of the sensor system to be tested, which greatly improves the simulation accuracy.
As an improvement of the technical scheme, the hydraulic chamber further comprises a grounding screw. The hydraulic simulation device has the advantages that the grounding screw is additionally arranged, so that the hydraulic chamber has a function of preventing and eliminating vibration, namely, the interference of equipment such as a defibrillator and the like on the hydraulic simulation device is prevented.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (7)
1. A hydraulic simulation device is characterized by comprising an automatic water injection module, a hydraulic chamber, a hydraulic simulation module, a pressure sensor and a main control module;
the automatic water injection module is used for injecting water into the hydraulic chamber;
the hydraulic simulation module is used for applying pressure to the hydraulic chamber;
the output end of the pressure sensor is connected with the input end of the main control module and used for collecting the pressure of the hydraulic chamber and sending the pressure to the main control module;
the output end of the main control module is connected with the input end of the hydraulic simulation module, and the output end of the main control module is also connected with the input end of the automatic water injection module.
2. The hydraulic simulation device of claim 1, wherein the automatic water injection module comprises a bidirectional liquid pump, an output end of the main control module is connected with an input end of the bidirectional liquid pump, and the bidirectional liquid pump is connected with the hydraulic chamber.
3. A hydraulic simulation apparatus according to claim 2, wherein the hydraulic chamber further comprises a water outlet.
4. The hydraulic simulation device of claim 1, wherein the hydraulic simulation module comprises a static pressure simulation module and a dynamic pressure simulation module;
the static pressure simulation module comprises a stepping motor, a spiral feeding mechanism and an injector which are sequentially connected, wherein a needle head of the injector is connected with the hydraulic chamber, and an input end of the stepping motor is connected with an output end of the main control module;
the dynamic die simulation module comprises a vibration exciter, a connecting rod and a piston which are sequentially connected, the piston is connected with the hydraulic chamber, and the input end of the vibration exciter is connected with the output end of the master control module.
5. The hydraulic simulation device of claim 4, further comprising a sensor interface to be tested, wherein the sensor interface is used for connecting a sensor system to be tested.
6. A hydraulic simulation device according to claim 5, wherein the frequency of the exciter is greater than the natural frequency of the sensor system under test.
7. A hydraulic simulation device according to any one of claims 1 to 6, wherein the hydraulic chamber further comprises a ground screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920395133.1U CN209947132U (en) | 2019-03-26 | 2019-03-26 | Hydraulic simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920395133.1U CN209947132U (en) | 2019-03-26 | 2019-03-26 | Hydraulic simulation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209947132U true CN209947132U (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920395133.1U Active CN209947132U (en) | 2019-03-26 | 2019-03-26 | Hydraulic simulation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209947132U (en) |
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2019
- 2019-03-26 CN CN201920395133.1U patent/CN209947132U/en active Active
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