Liquid pressure stabilization automatic control system

Abstract

The utility model relates to a liquid pressure stabilization automatic control system, and relates to the field of pressure stabilization control. According to the application, the first end of a first silicone tube is inserted into a beaker, the second end of the first silicone tube is connected with the first end of a three-way valve, the first silicone tube penetrates through pressurizing equipment, the second end of the three-way valve is connected with equipment needing to be pressurized, and the third end of the three-way valve is connected with the first end of a second silicone tube; the second end of the second silicone tube is connected with the pressure testing end of the pressure gauge, the pressure collecting end of the control device is connected with the output end of the pressure gauge, and the control end of the control device is connected with the controlled end of the pressurization device. The control equipment is used for reading the pressure value of the equipment needing to be pressurized through the pressure gauge and sending a control instruction to the pressurization equipment according to the pressure value and a preset pressure value, and the control instruction is used for controlling the pressurization equipment to conduct liquid pressurization on the equipment needing to be pressurized so that the pressure value can be equal to the preset pressure value. The problem that the pressure value of equipment needing to be pressurized cannot be stabilized at the preset pressure value is solved.

Description

Technical Field

[0001] The present application relates to the field of voltage stabilization control, and in particular to a liquid voltage stabilization automatic control system. Background Art

[0002] DIC (Digital Image Correlation, also known as digital speckle correlation method) is to obtain the deformation information of the region of interest through correlation calculation of two digital images of the specimen before and after deformation. The basic principle is to divide the region of interest in the image before deformation into grids and treat each sub-region as rigid motion. Then, for each sub-region, a certain search method is used to perform correlation calculation according to a pre-defined correlation function, and the region with the maximum mutual correlation coefficient with the sub-region is found in the deformed image, that is, the position of the sub-region after deformation, and then the displacement of the sub-region is obtained. By calculating all sub-regions, the deformation information of the whole field can be obtained.

[0003] In the DIC experiment of measuring the displacement and strain of blood vessels under normal human blood pressure (18kpa~33kpa), the blood vessels need to be pressurized to a certain set value through liquid, and then the camera takes pictures to complete the experiment. Therefore, the pressure of the blood vessels needs to be stabilized at the preset pressure value to ensure the stability of the blood vessel state captured by the camera. However, there are few pressure stabilization solutions in this regard, and most of the existing pressure stabilization technologies are for 100kpa and above, which are highly dependent on the pressure stabilization equipment and cannot achieve intelligent monitoring. This will cause the blood vessels to easily exceed the preset pressure value during the pressurization process, and the goal of pressure stabilization cannot be achieved. The accuracy also does not meet the requirements of vascular experiments. Utility Model Content

[0004] The present application provides a liquid pressure stabilization automatic control system, which is used to solve the problem that the pressure value of a device that needs to be pressurized cannot be stabilized at a preset pressure value.

[0005] The embodiment of the present application provides a liquid pressure-stabilizing automatic control system, including a beaker, a first silicone tube, a pressurizing device, a three-way valve, a device requiring pressurization, a second silicone tube, a pressure gauge, and a control device;

[0006] The first end of the first silicone tube is inserted into the beaker, the second end of the first silicone tube is connected to the first end of the three-way valve, the first silicone tube passes through the pressurizing device, the second end of the three-way valve is connected to the device to be pressurized, the third end of the three-way valve is connected to the first end of the second silicone tube, the second end of the second silicone tube is connected to the pressure testing end of the pressure gauge, the pressure collection end of the control device is connected to the output end of the pressure gauge, and the control end of the control device is connected to the controlled end of the pressurizing device;

[0007] The control device is used to read the pressure value of the device that needs to be pressurized through the pressure gauge, and send a control instruction to the pressurizing device based on the pressure value and the preset pressure value, wherein the control instruction is used to control the pressurizing device to pressurize the liquid of the device that needs to be pressurized so that the pressure value is equal to the preset pressure value.

[0008] Optionally, the liquid voltage stabilization automatic control system further comprises a power supply; the control device comprises a host, a first digital-to-analog converter, a first analog-to-digital converter and a second digital-to-analog converter;

[0009] The output end of the power supply is connected to the power supply end of the pressure gauge, and the output end of the power supply is connected to the power supply end of the pressurizing device;

[0010] The first output end of the host is connected to the input end of the first digital-to-analog converter, the output end of the first digital-to-analog converter is connected to the controlled end of the pressure gauge, the output end of the pressure gauge is connected to the input end of the first analog-to-digital converter, the output end of the first analog-to-digital converter is connected to the pressure collection end of the host, the second output end of the host is connected to the input end of the second digital-to-analog converter, and the output end of the second digital-to-analog converter is connected to the controlled end of the pressurizing device;

[0011] The first digital-to-analog converter is used to receive the pressure reading instruction sent by the host, convert the pressure reading instruction into a first analog signal, and send the first analog signal to the pressure gauge;

[0012] The first analog-to-digital converter is used to receive the pressure signal collected by the pressure gauge, convert the pressure signal into a first digital signal, and send the first digital signal to the host;

[0013] The host is used to send a pressure reading instruction to the first digital-to-analog converter, receive the first digital signal sent by the first analog-to-digital converter, wherein the first digital signal carries the pressure value of the device to be pressurized, and send the control instruction to the second digital-to-analog converter according to the pressure value and a preset pressure value;

[0014] The second digital-to-analog converter is used to receive the control instruction sent by the host, convert the control instruction into a second analog signal, and send the second analog signal to the pressurizing device.

[0015] Optionally, the host includes a user interface display module and a control module; the control device also includes a second analog-to-digital converter;

[0016] The output end of the user interface display module is connected to the first input end of the control module, the first output end of the control module is connected to the input end of the first digital-to-analog converter, the output end of the first analog-to-digital converter is connected to the pressure acquisition end of the control module, the second output end of the control module is connected to the input end of the second digital-to-analog converter, the third output end of the control module is connected to the input end of the user interface display module, the output end of the pressurizing device is connected to the input end of the second analog-to-digital converter, and the output end of the second analog-to-digital converter is connected to the speed acquisition end of the control module;

[0017] The user interface display module is used to display a user interface, obtain the preset pressure value input to the user interface and the starting speed of the pressurizing device, send the starting speed and the preset pressure value to the control module, obtain a trigger operation of an operation button in the user interface, wherein the operation button includes a pressurizing button, a pressure relief button and a stop button, send an operation instruction corresponding to the trigger operation to the control module, receive the pressure value sent by the control module, display the pressure value and a pressure value change curve drawn according to the pressure value in the user interface, receive the speed value sent by the control module, and display the speed value in the user interface;

[0018] The second analog-to-digital converter is used to receive the speed signal collected by the pressurizing device, convert the speed signal into a second digital signal, and send the second digital signal to the control module;

[0019] The control module is used to receive the operation instruction sent by the user interface display module, send the operation instruction to the second digital-to-analog converter, receive the starting speed and the preset pressure value sent by the user interface display module, send the starting speed to the second digital-to-analog converter, send a pressure reading instruction to the first digital-to-analog converter, receive the first digital signal sent by the first analog-to-digital converter, send the control instruction to the second digital-to-analog converter according to the pressure value and the preset pressure value, send the pressure value to the user interface display module, receive the second digital signal sent by the second analog-to-digital converter, wherein the second digital signal carries the speed value of the pressurizing device, and sends the speed value to the user interface display module;

[0020] The second digital-to-analog converter is also used to receive the operation instruction sent by the control module, convert the operation instruction into a third analog signal, and send the third analog signal to the pressurizing device, receive the starting speed sent by the control module, convert the starting speed into a fourth analog signal, and send the fourth analog signal to the pressurizing device.

[0021] Optionally, the control module is specifically used to compare the pressure value with half of the preset pressure value; if the pressure value is less than half of the preset pressure value, send a first control instruction to the second digital-to-analog converter, the first control instruction is used to control the speed value of the pressurizing device to increase but be less than a preset speed threshold; if the pressure value is greater than or equal to half of the preset pressure value, send a second control instruction to the second digital-to-analog converter, the second control instruction is used to control the speed value of the pressurizing device to decrease, and when the difference obtained by subtracting the preset pressure value from the pressure value is less than a preset value, control the speed value of the pressurizing device to be adjusted to a set speed; compare the pressure value and the preset pressure value; if the pressure value is equal to the preset pressure value, send a third control instruction to the second digital-to-analog converter, the third control instruction is used to control the speed value of the pressurizing device to be adjusted to zero.

[0022] Optionally, the control module is also used to continue receiving the first digital signal sent by the first analog-to-digital converter when the pressure value reaches the preset pressure value; compare the pressure value with the preset pressure value; if the pressure value is less than the preset pressure value, send a fourth control instruction to the second digital-to-analog converter, and the fourth control instruction is used to control the pressurizing device to start rotating; compare the pressure value with the preset pressure value; if the pressure value is equal to the preset pressure value, send the third control instruction to the second digital-to-analog converter.

[0023] Optionally, the control module is specifically used to obtain a speed delay setting time length, and when the speed delay setting time length is reached, send the first control instruction, the second control instruction, the third control instruction and the fourth control instruction to the second digital-to-analog converter.

[0024] Optionally, the pressurizing device comprises a peristaltic pump.

[0025] Optionally, the device requiring pressurization includes vascular tissue.

[0026] The above technical solution provided by the embodiment of the present application has the following advantages over the prior art: In the embodiment of the present application, a liquid pressure-stabilizing automatic control system is provided, including a beaker, a first silicone tube, a pressurizing device, a three-way valve, a device to be pressurized, a second silicone tube, a pressure gauge and a control device; the first end of the first silicone tube is inserted into the beaker, the second end of the first silicone tube is connected to the first end of the three-way valve, the first silicone tube passes through the pressurizing device, the second end of the three-way valve is connected to the device to be pressurized, the third end of the three-way valve is connected to the first end of the second silicone tube, the second end of the second silicone tube is connected to the pressure testing end of the pressure gauge, the pressure collection end of the control device is connected to the output end of the pressure gauge, and the control end of the control device is connected to the controlled end of the pressurizing device; the control device is used to read the pressure value of the device to be pressurized through the pressure gauge, and send a control instruction to the pressurizing device according to the pressure value and the preset pressure value, wherein the control instruction is used to control the pressurizing device to pressurize the liquid of the device to be pressurized so that the pressure value is equal to the preset pressure value. In the present application, the control device reads the pressure value of the device that needs to be pressurized in real time through the pressure gauge, and controls the pressurizing device to pressurize the liquid of the device that needs to be pressurized by sending a control instruction to the pressurizing device, so that the pressure value is equal to the preset pressure value, ensuring that the pressure value of the device that needs to be pressurized is stable at the preset pressure value, which helps the camera to take more stable photos and achieve more accurate DIC measurement results, and solves the problem that the pressure value of the device that needs to be pressurized cannot be stabilized at the preset pressure value. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0029] Figure 1 This is a schematic diagram of the structure of the liquid pressure stabilization automatic control system in the embodiment of the present application;

[0030] Figure 2 This is a structural schematic diagram of a liquid pressure stabilization automatic control system in a specific embodiment of the present application;

[0031] Figure 3 This is a structural schematic diagram of a liquid pressure stabilization automatic control system in a specific embodiment of the present application;

[0032] The figure numbers are as follows: 1-beaker, 2-first silicone tube, 3-pressurizing device, 4-three-way valve, 5-device to be pressurized, 6-second silicone tube, 7-pressure gauge, 8-control device, 9-power supply, 81-host, 82-first digital-to-analog converter, 83-first analog-to-digital converter, 84-second digital-to-analog converter, 85-second analog-to-digital converter, 811-user interface display module, 812-control module. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] In the embodiment of the present application, a liquid pressure stabilization automatic control system is provided. Figure 1 As shown, the liquid pressure stabilization automatic control system includes a beaker 1, a first silicone tube 2, a pressurizing device 3, a three-way valve 4, a device to be pressurized 5, a second silicone tube 6, a pressure gauge 7 and a control device 8;

[0035] The first end of the first silicone tube 2 is inserted into the beaker 1, the second end of the first silicone tube 2 is connected to the first end of the three-way valve 4, the first silicone tube 2 passes through the pressurizing device 3, the second end of the three-way valve 4 is connected to the device 5 that needs to be pressurized, the third end of the three-way valve 4 is connected to the first end of the second silicone tube 6, the second end of the second silicone tube 6 is connected to the pressure testing end of the pressure gauge 7, the pressure collecting end of the control device 8 is connected to the output end of the pressure gauge 7, and the control end of the control device 8 is connected to the controlled end of the pressurizing device 3;

[0036] The control device 8 is used to read the pressure value of the device 5 that needs to be pressurized through the pressure gauge 7, and send a control instruction to the pressurizing device 3 according to the pressure value and the preset pressure value, wherein the control instruction is used to control the pressurizing device 3 to pressurize the liquid of the device 5 that needs to be pressurized so that the pressure value is equal to the preset pressure value.

[0037] The pressure gauge 7 is used to read the pressure value of the device 5 that needs to be pressurized, with an accuracy of 0.01 kpa.

[0038] The pressurizing device 3 is used to pressurize and release the pressure of the device 5 that needs to be pressurized.

[0039] The specific working process is as follows: the pressurizing device 3 starts to operate, and the water in the beaker 1 is supplied to the three-way valve 4 through the first silicone tube 2, and the water in the three-way valve 4 flows into the device 5 that needs to be pressurized, so as to pressurize the liquid of the device 5 that needs to be pressurized. The control device 8 reads the pressure value of the device 5 that needs to be pressurized through the pressure gauge 7, and sends a control instruction to the pressurizing device 3 according to the pressure value and the preset pressure value, wherein the control instruction is used to control the pressurizing device 3 to pressurize the liquid of the device 5 that needs to be pressurized so that the pressure value is equal to the preset pressure value.

[0040] In the present application, the control device reads the pressure value of the device that needs to be pressurized in real time through the pressure gauge, and controls the pressurizing device to pressurize the liquid of the device that needs to be pressurized by sending a control instruction to the pressurizing device, so that the pressure value is equal to the preset pressure value, ensuring that the pressure value of the device that needs to be pressurized is stable at the preset pressure value, which helps the camera to take more stable photos and achieve more accurate DIC measurement results, and solves the problem that the pressure value of the device that needs to be pressurized cannot be stabilized at the preset pressure value.

[0041] In a specific embodiment, Figure 2 As shown, the liquid voltage stabilization automatic control system also includes a power supply 9; the control device 8 includes a host 81, a first digital-to-analog converter 82, a first analog-to-digital converter 83 and a second digital-to-analog converter 84;

[0042] The output end of the power supply 9 is connected to the power supply end of the pressure gauge 7, and the output end of the power supply 9 is connected to the power supply end of the pressurizing device 3;

[0043] The first output end of the host 81 is connected to the input end of the first digital-to-analog converter 82, the output end of the first digital-to-analog converter 82 is connected to the controlled end of the pressure gauge 7, the output end of the pressure gauge 7 is connected to the input end of the first analog-to-digital converter 83, the output end of the first analog-to-digital converter 83 is connected to the pressure collection end of the host 81, the second output end of the host 81 is connected to the input end of the second digital-to-analog converter 84, and the output end of the second digital-to-analog converter 84 is connected to the controlled end of the pressurizing device 3;

[0044] The first digital-to-analog converter 82 is used to receive the pressure reading instruction sent by the host 81, convert the pressure reading instruction into a first analog signal, and send the first analog signal to the pressure gauge 7;

[0045] A first analog-to-digital converter 83 is used to receive the pressure signal collected by the pressure gauge 7, convert the pressure signal into a first digital signal, and send the first digital signal to the host 81;

[0046] The host 81 is used to send a pressure reading instruction to the first digital-to-analog converter 82, receive a first digital signal sent by the first analog-to-digital converter 82, wherein the first digital signal carries the pressure value of the device to be pressurized, and send a control instruction to the second digital-to-analog converter 84 according to the pressure value and the preset pressure value;

[0047] The second digital-to-analog converter 84 is used to receive the control instruction sent by the host 81, convert the control instruction into a second analog signal, and send the second analog signal to the pressurizing device 3.

[0048] The power supply 9 supplies power to the pressure gauge 7 and the pressurizing device 3 .

[0049] The specific working process is as follows: the pressurizing device 3 starts to operate when it is powered on. After the pressurizing device 3 starts to operate, the host 81 sends a pressure reading instruction to the first digital-to-analog converter 82. After receiving the pressure reading instruction sent by the host 81, the first digital-to-analog converter 82 converts the pressure reading instruction into a first analog signal that can be recognized by the pressure gauge 7. After the pressure gauge 7 is powered on, it starts to collect the pressure signal and transmits the pressure signal to the first analog-to-digital converter 83. The first analog-to-digital converter 83 converts the pressure signal into a first digital signal and sends the first digital signal to the host 81, wherein the first digital signal carries the pressure value of the device to be pressurized, completing a complete set of pressure readings, and the pressure reading is carried out from the beginning to the end of the entire process. The host 81 sends a control instruction to the second digital-to-analog converter 84 according to the pressure value and the preset pressure value. The second digital-to-analog converter 84 converts the control instruction into a second analog signal and sends the second analog signal to the pressurizing device 3, controlling the pressurizing device 3 to pressurize the liquid of the device 5 to be pressurized so that the pressure value is equal to the preset pressure value.

[0050] In a specific embodiment, Figure 3 As shown, the host 81 includes a user interface display module 811 and a control module 812; the control device 8 also includes a second analog-to-digital converter 85;

[0051] The output end of the user interface display module 811 is connected to the first input end of the control module 812, the first output end of the control module 812 is connected to the input end of the first digital-to-analog converter 82, the output end of the first analog-to-digital converter 83 is connected to the pressure acquisition end of the control module 812, the second output end of the control module 812 is connected to the input end of the second digital-to-analog converter 84, the third output end of the control module 812 is connected to the input end of the user interface display module 811, the output end of the pressurizing device 3 is connected to the input end of the second analog-to-digital converter 85, and the output end of the second analog-to-digital converter 85 is connected to the speed acquisition end of the control module 812;

[0052] The user interface display module 811 is used to display the user interface, obtain the preset pressure value input to the user interface and the starting speed of the pressurizing device, send the starting speed and the preset pressure value to the control module 812, obtain the trigger operation of the operation button in the user interface, wherein the operation button includes a pressurizing button, a pressure relief button and a stop button, send the operation instruction corresponding to the trigger operation to the control module 812, receive the pressure value sent by the control module 812, display the pressure value and the pressure value change curve drawn according to the pressure value in the user interface, receive the speed value sent by the control module 812, and display the speed value in the user interface;

[0053] The second analog-to-digital converter 85 is used to receive the speed signal collected by the pressurizing device 3, convert the speed signal into a second digital signal, and send the second digital signal to the control module 812;

[0054] The control module 812 is used to receive the operation instruction sent by the user interface display module 811, send the operation instruction to the second digital-to-analog converter 84, receive the starting speed and the preset pressure value sent by the user interface display module 811, send the starting speed to the second digital-to-analog converter 84, send the pressure reading instruction to the first digital-to-analog converter 82, receive the first digital signal sent by the first analog-to-digital converter 83, send the control instruction to the second digital-to-analog converter 84 according to the pressure value and the preset pressure value, send the pressure value to the user interface display module 811, receive the second digital signal sent by the second analog-to-digital converter 85, wherein the second digital signal carries the speed value of the pressurizing device 3, and send the speed value to the user interface display module 811;

[0055] The second digital-to-analog converter 84 is also used to receive the operation instructions sent by the control module 812, convert the operation instructions into a third analog signal, and send the third analog signal to the pressurizing device 3, receive the starting speed sent by the control module 812, convert the starting speed into a fourth analog signal, and send the fourth analog signal to the pressurizing device 3.

[0056] Among them, operation buttons are set in the user interface, including a pressurization button, a pressure relief button and a stop button, which can facilitate the user to control the pressurization device 3 to pressurize, relieve pressure on the device 5 that needs pressurization and control the pressurization device 3 to stop running by triggering the operation buttons.

[0057] The pressure value and the pressure value change curve drawn according to the pressure value are displayed in the user interface, so that the user can intuitively understand the change of the pressure value in real time.

[0058] The rotation speed value is displayed in the user interface, so that the user can intuitively understand the change of the rotation speed value of the pressurizing device 3 in real time.

[0059] In the user interface, the user can also input a preset pressure value and a starting speed of the pressurizing device to control the pressurizing device 3 to start running at the starting speed, and control the pressurizing device 3 to pressurize the liquid in the device 5 that needs pressurization so that the pressure value is equal to the preset pressure value.

[0060] In a specific embodiment, the control module is specifically used to compare the pressure value with half of the preset pressure value; if the pressure value is less than half of the preset pressure value, a first control instruction is sent to the second digital-to-analog converter, and the first control instruction is used to control the speed value of the pressurizing device to increase but be less than a preset speed threshold; if the pressure value is greater than or equal to half of the preset pressure value, a second control instruction is sent to the second digital-to-analog converter, and the second control instruction is used to control the speed value of the pressurizing device to decrease, and when the difference obtained by subtracting the preset pressure value from the pressure value is less than the preset value, the speed value of the pressurizing device is controlled to be adjusted to the set speed; compare the pressure value and the preset pressure value; if the pressure value is equal to the preset pressure value, a third control instruction is sent to the second digital-to-analog converter, and the third control instruction is used to control the speed value of the pressurizing device to be adjusted to zero.

[0061] The pressure value is read in real time and is read throughout the entire operation of the liquid pressure stabilization automation control system.

[0062] In order to allow the pressure value of the system to slowly approach the preset pressure value during the pressurization process and not exceed the preset pressure value too much, the pressurization process is divided into two parts. In the process from 0 to half of the preset pressure value, the speed value of the pressurization device is controlled to increase but is less than the preset speed threshold. In the process from half of the preset pressure value to the preset pressure value, the speed value of the pressurization device is controlled to decrease and become smaller in a gradient. When the difference obtained by subtracting the preset pressure value from the pressure value is less than the preset value, that is, close to the preset pressure value, the speed value of the pressurization device is controlled to be adjusted to the set speed.

[0063] When the pressure value reaches the preset pressure value, the rotation speed value of the pressure-adding device is adjusted to zero, and the pressure-adding device is controlled to stop rotating.

[0064] In a specific embodiment, the control module is also used to continue to receive the first digital signal sent by the first analog-to-digital converter when the pressure value reaches a preset pressure value; compare the pressure value with the preset pressure value; if the pressure value is less than the preset pressure value, send a fourth control instruction to the second digital-to-analog converter, and the fourth control instruction is used to control the pressurizing device to start rotating; compare the pressure value with the preset pressure value; if the pressure value is equal to the preset pressure value, send a third control instruction to the second digital-to-analog converter.

[0065] When the pressure value reaches the preset pressure value and the pressurizing device stops rotating, the pressure value of the device that needs pressurization will be affected by the external pressure, causing the pressure value to decrease. The pressure change will continue to be monitored. If the pressure value decreases, that is, the pressure value is less than the preset pressure value, the pressurizing device will be controlled to start rotating to replenish the pressure for the device that needs pressurization. After the pressure value reaches the preset pressure value for the first time, when the pressure value drops below the preset pressure value, the pressurizing device starts rotating. When the pressure value reaches the preset pressure value for the second time, the pressurizing device stops rotating again, and the cycle repeats until it stops. The pressure value changes will be monitored all the time, and the rotation speed will be adjusted continuously to keep the pressure value within the preset pressure value range.

[0066] In a specific embodiment, the control module is specifically used to obtain the speed delay setting time length, and when the speed delay setting time length is reached, send the first control instruction, the second control instruction, the third control instruction and the fourth control instruction to the second digital-to-analog converter.

[0067] Since the pressure value reading and the speed value setting of the pressurizing device both require communication time, there is a situation where the pressure value reading and the speed value setting of the pressurizing device are not synchronized. Therefore, the speed delay setting time is set. When the speed delay setting time is reached, the first control instruction, the second control instruction, the third control instruction and the fourth control instruction are sent to the second digital-to-analog converter, so that the pressure applied by the pressurizing device can be read by the pressure gauge. In this way, the pressure value and the speed value change synchronously.

[0068] In a specific embodiment, after the pressure value stabilizes at the preset pressure value, you can choose to end the experiment or continue another experiment. If you end the experiment, the system will release the pressure. If you start another experiment, you will return to the initial user interface, reset the required preset pressure value and starting speed, and restart the experiment.

[0069] In a specific embodiment, the pressurizing device includes a peristaltic pump.

[0070] The pressurizing device may include a peristaltic pump or other device capable of injecting water to increase the pressure.

[0071] In one embodiment, the device requiring pressurization includes vascular tissue.

[0072] The liquid pressure-stabilizing automatic control system can be used not only in blood vessel expansion experiments, but also in other pressurization tests within the pressure range of 1kpa-100kpa.

[0073] Compared with the previous methods that are highly dependent on pressurizing equipment, the present application can more accurately achieve real-time reading and display of pressure values ​​in the range of 18kpa~33kpa under simple pressurizing equipment. The system pressure is automatically pressurized and stabilized to the target of ±0.1kpa of the preset pressure value, which helps the camera to take more stable photos and achieve more accurate DIC measurement results.

[0074] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0075] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A liquid pressure stabilization automatic control system, It is characterized in that It includes a beaker, a first silicone tube, a pressurizing device, a three-way valve, a device that needs to be pressurized, a second silicone tube, a pressure gauge and a control device; The first end of the first silicone tube is inserted into the beaker, the second end of the first silicone tube is connected to the first end of the three-way valve, the first silicone tube passes through the pressurizing device, the second end of the three-way valve is connected to the device to be pressurized, the third end of the three-way valve is connected to the first end of the second silicone tube, the second end of the second silicone tube is connected to the pressure testing end of the pressure gauge, the pressure collection end of the control device is connected to the output end of the pressure gauge, and the control end of the control device is connected to the controlled end of the pressurizing device; The control device is used to read the pressure value of the device that needs to be pressurized through the pressure gauge, and send a control instruction to the pressurizing device based on the pressure value and the preset pressure value, wherein the control instruction is used to control the pressurizing device to pressurize the liquid of the device that needs to be pressurized so that the pressure value is equal to the preset pressure value.

2. The liquid pressure stabilization automatic control system according to claim 1, It is characterized in that The liquid voltage stabilization automatic control system also includes a power supply; the control device includes a host, a first digital-to-analog converter, a first analog-to-digital converter, and a second digital-to-analog converter; The output end of the power supply is connected to the power supply end of the pressure gauge, and the output end of the power supply is connected to the power supply end of the pressurizing device; The first output end of the host is connected to the input end of the first digital-to-analog converter, the output end of the first digital-to-analog converter is connected to the controlled end of the pressure gauge, the output end of the pressure gauge is connected to the input end of the first analog-to-digital converter, the output end of the first analog-to-digital converter is connected to the pressure collection end of the host, the second output end of the host is connected to the input end of the second digital-to-analog converter, and the output end of the second digital-to-analog converter is connected to the controlled end of the pressurizing device; The first digital-to-analog converter is used to receive the pressure reading instruction sent by the host, convert the pressure reading instruction into a first analog signal, and send the first analog signal to the pressure gauge; The first analog-to-digital converter is used to receive the pressure signal collected by the pressure gauge, convert the pressure signal into a first digital signal, and send the first digital signal to the host; The host is used to send a pressure reading instruction to the first digital-to-analog converter, receive the first digital signal sent by the first analog-to-digital converter, wherein the first digital signal carries the pressure value of the device to be pressurized, and send the control instruction to the second digital-to-analog converter according to the pressure value and a preset pressure value; The second digital-to-analog converter is used to receive the control instruction sent by the host, convert the control instruction into a second analog signal, and send the second analog signal to the pressurizing device.

3. The liquid pressure stabilization automatic control system according to claim 2, It is characterized in that The host includes a user interface display module and a control module; the control device also includes a second analog-to-digital converter; The output end of the user interface display module is connected to the first input end of the control module, the first output end of the control module is connected to the input end of the first digital-to-analog converter, the output end of the first analog-to-digital converter is connected to the pressure acquisition end of the control module, the second output end of the control module is connected to the input end of the second digital-to-analog converter, the third output end of the control module is connected to the input end of the user interface display module, the output end of the pressurizing device is connected to the input end of the second analog-to-digital converter, and the output end of the second analog-to-digital converter is connected to the speed acquisition end of the control module; The user interface display module is used to display a user interface, obtain the preset pressure value input to the user interface and the starting speed of the pressurizing device, send the starting speed and the preset pressure value to the control module, obtain a trigger operation of an operation button in the user interface, wherein the operation button includes a pressurizing button, a pressure relief button and a stop button, send an operation instruction corresponding to the trigger operation to the control module, receive the pressure value sent by the control module, display the pressure value and a pressure value change curve drawn according to the pressure value in the user interface, receive the speed value sent by the control module, and display the speed value in the user interface; The second analog-to-digital converter is used to receive the speed signal collected by the pressurizing device, convert the speed signal into a second digital signal, and send the second digital signal to the control module; The control module is used to receive the operation instruction sent by the user interface display module, send the operation instruction to the second digital-to-analog converter, receive the starting speed and the preset pressure value sent by the user interface display module, send the starting speed to the second digital-to-analog converter, send a pressure reading instruction to the first digital-to-analog converter, receive the first digital signal sent by the first analog-to-digital converter, send the control instruction to the second digital-to-analog converter according to the pressure value and the preset pressure value, send the pressure value to the user interface display module, receive the second digital signal sent by the second analog-to-digital converter, wherein the second digital signal carries the speed value of the pressurizing device, and sends the speed value to the user interface display module; The second digital-to-analog converter is also used to receive the operation instruction sent by the control module, convert the operation instruction into a third analog signal, and send the third analog signal to the pressurizing device, receive the starting speed sent by the control module, convert the starting speed into a fourth analog signal, and send the fourth analog signal to the pressurizing device.

4. The liquid pressure stabilization automatic control system according to claim 3, It is characterized in that The control module is specifically used to compare the pressure value with half of the preset pressure value; if the pressure value is less than half of the preset pressure value, a first control instruction is sent to the second digital-to-analog converter, and the first control instruction is used to control the speed value of the pressurizing device to increase but be less than a preset speed threshold; if the pressure value is greater than or equal to half of the preset pressure value, a second control instruction is sent to the second digital-to-analog converter, and the second control instruction is used to control the speed value of the pressurizing device to decrease, and when the difference obtained by subtracting the preset pressure value from the pressure value is less than a preset value, the speed value of the pressurizing device is controlled to be adjusted to a set speed; Compare the pressure value with the preset pressure value; if the pressure value is equal to the preset pressure value, send a third control instruction to the second digital-to-analog converter, and the third control instruction is used to control the rotation speed value of the pressurizing device to be adjusted to zero.

5. The liquid pressure stabilization automatic control system according to claim 4, It is characterized in that The control module is also used to continue to receive the first digital signal sent by the first analog-to-digital converter when the pressure value reaches the preset pressure value; compare the pressure value with the preset pressure value; if the pressure value is less than the preset pressure value, send a fourth control instruction to the second digital-to-analog converter, and the fourth control instruction is used to control the pressurizing device to start rotating; compare the pressure value with the preset pressure value; if the pressure value is equal to the preset pressure value, send the third control instruction to the second digital-to-analog converter.

6. The liquid pressure stabilization automatic control system according to claim 5, It is characterized in that The control module is specifically used to obtain the speed delay setting time length, and when the speed delay setting time length is reached, send the first control instruction, the second control instruction, the third control instruction and the fourth control instruction to the second digital-to-analog converter.

7. The liquid pressure stabilization automatic control system according to any one of claims 1 to 6, It is characterized in that The pressurizing device includes a peristaltic pump.

8. The liquid pressure stabilization automatic control system according to claim 7, It is characterized in that The device requiring pressurization includes vascular tissue.

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