An intracranial physiological parameter test simulator and test method

Abstract

The application discloses an intracranial physiological parameter test simulator and a test method. The simulator comprises a controller module, a signal acquisition module and a signal conditioning module. The controller module controls the signal acquisition module to perform signal acquisition, the signal conditioning module conditions the signal acquired by the signal acquisition module, and the controller module controls the signal conditioning module to output the conditioned signal through a selected channel. The signal acquisition module comprises a pressure acquisition unit and a temperature acquisition unit. The pressure acquisition unit is used for acquiring an intracranial pressure signal, and the temperature acquisition unit is used for acquiring an intracranial temperature signal. The pressure acquisition unit adopts a full-bridge structure. Each bridge arm of the full-bridge structure is respectively provided with a first resistor, and each bridge arm is respectively connected with a first digital potentiometer in parallel. The probe of the intracranial pressure monitor can be replaced by the application, and the error caused by the probe itself can be eliminated.

Description

TECHNICAL FIELD

[0001] The present application generally relates to the technical field of intracranial pressure monitoring. More particularly, the present application relates to an intracranial physiological parameter test simulator and a test method. BACKGROUND

[0002] In recent years, intracranial pressure monitoring technology has made significant technical progress, and the market has shown a vigorous development trend. In particular, in the treatment of diseases such as invasive brain injury and intracranial hemorrhage, the demand for intracranial pressure monitoring is increasing.

[0003] In the prior art, some intracranial pressure monitoring devices monitor multiple physiological parameters such as intracranial temperature and pressure to guide treatment decisions, reduce complication risks, and improve patient outcomes. However, the intracranial pressure monitoring devices in the prior art have defects such as temperature drift, zero drift, and nonlinearity, which can cause errors in the acquired intracranial temperature, pressure, and other data.

[0004] Therefore, there is an urgent need to provide an intracranial physiological parameter test scheme that can solve the defects of temperature drift, zero drift, and nonlinearity of intracranial pressure monitoring devices and obtain more accurate data. SUMMARY

[0005] To at least solve one or more technical problems as mentioned above, the present application proposes an intracranial physiological parameter test scheme in multiple aspects.

[0006] In a first aspect, the present application provides an intracranial physiological parameter test simulator, comprising: a controller module, a signal acquisition module, and a signal conditioning module; the controller module controls the signal acquisition module to perform signal acquisition, the signal conditioning module conditions the signal acquired by the signal acquisition module, and the controller module controls the signal conditioning module to output the conditioned signal through a selected channel; the signal acquisition module includes a pressure acquisition unit and a temperature acquisition unit, the pressure acquisition unit is used to acquire an intracranial pressure signal, and the temperature acquisition unit is used to acquire an intracranial temperature signal; the pressure acquisition unit adopts a full-bridge structure, each bridge arm of the full-bridge structure is provided with a first resistor, and each bridge arm is respectively connected in parallel with a first digital potentiometer.

[0007] In some embodiments, the first resistor adopts a fixed resistor.

[0008] In some embodiments, the temperature acquisition unit comprises a second digital potentiometer, a second resistor and a third resistor, a first end of the second digital potentiometer is connected to a direct current power supply, a first end of the second resistor is connected to a second end of the second digital potentiometer, a first end of the third resistor is connected to a second end of the second resistor, a second end of the third resistor is connected to ground, and the second resistor and the third resistor are both fixed resistors.

[0009] In some embodiments, a second end of the second resistor serves as an output end of the temperature acquisition unit.

[0010] In some embodiments, the simulator further comprises an output interface.

[0011] In some embodiments, during the process in which the controller module controls the signal conditioning module to output the conditioned signal through the selected channel, the following steps are performed: the controller module selects a first channel or a second channel as the channel through which the signal conditioning module outputs, wherein the first channel is used to realize the communication between the signal conditioning module and the controller module, and the second channel is used to realize the communication between the signal conditioning module and the intracranial pressure monitor through the output interface; and the signal conditioning module outputs the conditioned signal to the controller module through the selected channel or outputs the conditioned signal to the intracranial pressure monitor through the output interface.

[0012] In some embodiments, the simulator further comprises a display module, which is used to output the temperature signal and the pressure signal under the control of the controller module.

[0013] In a second aspect, the application provides an intracranial physiological parameter testing method, which uses the intracranial physiological parameter testing simulator of any one of the embodiments of the first aspect to test intracranial physiological parameters, and the method comprises: the controller module selects a first channel as the channel of the signal conditioning module output, wherein the first channel is used to realize the communication between the signal conditioning module and the controller module; forming a first resistance value table corresponding to the pressure acquisition unit when the signal conditioning module outputs all pressures in the set pressure range in the controller module, and forming a second resistance value table corresponding to the temperature acquisition unit when the signal conditioning module outputs all temperatures in the set temperature range in the controller module; obtaining the required output pressure and temperature of the intracranial physiological parameter testing simulator; the controller module queries the resistance value required by the pressure acquisition unit and the resistance value required by the temperature acquisition unit in the first resistance value table and the second resistance value table based on the required output pressure and temperature, and controls the pressure acquisition unit and the temperature acquisition unit to output target pressure signals and target temperature signals to the signal conditioning module based on the resistance value required by the pressure acquisition unit and the resistance value required by the temperature acquisition unit; the controller module selects a second channel as the channel of the signal conditioning module output, the signal conditioning module conditions the target pressure signal and the target temperature signal, and outputs through the second channel, wherein the second channel is used to realize the communication between the signal conditioning module and the intracranial pressure monitor through the output interface.

[0014] In some embodiments, in the process of forming the first resistance value table corresponding to the pressure acquisition unit when the signal conditioning module outputs all pressures in the set pressure range in the controller module, the following steps are performed: the controller module adjusts the resistance value of the first digital potentiometer on each bridge arm in the pressure acquisition unit, so that the output pressure value of the signal conditioning module after the signal output by the pressure acquisition unit is conditioned by the signal conditioning module is increased by a unit pressure value compared with the previous time; determining whether the current output pressure value of the signal conditioning module is within the set pressure range; in response to the current output pressure value of the signal conditioning module being within the set pressure range, recording the resistance value on each bridge arm in the current pressure acquisition unit in the controller module, and returning to the step of adjusting the resistance value of the first digital potentiometer on each bridge arm in the pressure acquisition unit; in response to the current output pressure value of the signal conditioning module not being within the set pressure range, forming the first resistance value table corresponding to the pressure acquisition unit based on the recorded resistance values.

[0015] In some embodiments, in the process of forming the second resistance value table corresponding to the temperature acquisition unit at all temperatures in the output set temperature range in the signal conditioning module, the following steps are performed: the controller module adjusts the resistance value corresponding to the temperature acquisition unit, so that the output temperature value of the signal conditioning module after the signal output by the temperature acquisition unit is conditioned by the signal conditioning module is increased by a unit temperature value compared with the previous time; it is judged whether the output temperature value of the current signal conditioning module is in the set temperature range; in response to the output temperature value of the current signal conditioning module being in the set temperature range, the resistance value corresponding to the current temperature acquisition unit in the controller module is recorded, and the step of adjusting the corresponding resistance value in the temperature acquisition unit is returned; in response to the output temperature value of the current signal conditioning module not being in the set temperature range, the second resistance value table corresponding to the temperature acquisition unit is formed based on the recorded resistance value each time.

[0016] Through the intracranial physiological parameter test simulator provided as above, the error caused by the probe itself can be excluded by the intracranial physiological parameter test simulator instead of the probe of the intracranial pressure monitor, and the full-bridge structure is adopted for the pressure acquisition unit, each bridge arm of the full-bridge structure is provided with a first resistor, and each bridge arm is connected in parallel with a first digital potentiometer, so that the temperature drift, zero drift, nonlinearity and other defects of the pressure acquisition unit itself can be eliminated, and more accurate pressure data can be obtained. Further, in some embodiments, the second digital potentiometer is adopted for the temperature acquisition unit, so that the temperature control accuracy can meet the requirements. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which several embodiments of the present application are shown by way of example, and wherein like or corresponding elements show like or corresponding parts, by referring to which; drawings, in which:

[0018] Figure 1 A first constituent schematic diagram of the intracranial physiological parameter test simulator according to an embodiment of the present application is shown;

[0019] Figure 2 A second constituent schematic diagram of the intracranial physiological parameter test simulator according to an embodiment of the present application is shown;

[0020] Figure 3 An exemplary flowchart of the intracranial physiological parameter test method according to an embodiment of the present application is shown;

[0021] Figure 4 An exemplary flowchart of forming the first resistance value table according to an embodiment of the present application is shown;

[0022] Figure 5 An exemplary flowchart of forming a second resistance table is shown. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the protection scope of the present application.

[0024] It should be understood that the terms “include” and “contain” used in the specification and claims of the present application indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or sets thereof.

[0025] It should also be understood that the terms used in the specification of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. As used in the specification and claims of the present application, the singular forms “a”, “an” and “the” are intended to include the plural forms, unless the context clearly indicates otherwise. It should be further understood that the term “and / or” used in the specification and claims of the present application refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0026] As used in the specification and claims of the present application, the term “if” can be interpreted as “when” or “upon” or “in response to a determination” or “in response to detecting” depending on the context. Similarly, the phrases “if it is determined” or “if [a described condition or event] is detected” can be interpreted to mean “upon determining” or “in response to determining” or “upon detecting [a described condition or event]” or “in response to detecting [a described condition or event]” depending on the context.

[0027] The specific embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0028] Figure 1 A first constituent schematic diagram of the intracranial physiological parameter test simulator 100 of the embodiments of the present application is shown.

[0029] As Figure 1As shown, the simulator 100 includes a controller module 110, a signal acquisition module 120, and a signal conditioning module 130. Specifically, the controller module 110 controls the signal acquisition module 120 to acquire signals, and the signal conditioning module 130 conditions the signals acquired by the signal acquisition module 120. The controller module 110 controls the signal conditioning module 130 to output the conditioned signals through selected channels. The signal acquisition module 120 includes a pressure acquisition unit 121 and a temperature acquisition unit 122. The pressure acquisition unit 121 is used to acquire intracranial pressure signals, and the temperature acquisition unit 122 is used to acquire intracranial temperature signals.

[0030] In the embodiment of the present application, the simulator 100 may include other modules in addition to the controller module 110, the signal acquisition module 120 and the signal conditioning module 130, and each module involves a specific composition. Figure 2 The other modules of the simulator 100 and the specific components involved in each module are described.

[0031] Figure 2 A second schematic diagram of the composition of the intracranial physiological parameter test simulator 100 according to an embodiment of the present application is shown.

[0032] like Figure 2 As shown, the simulator 100 includes, in addition to a controller module 110, a signal acquisition module 120, and a signal conditioning module 130, an output interface 140 and a display module 150. Specifically, the output interface 140 is connected to the signal conditioning module 130 and an external intracranial pressure monitor 160, and is used to enable communication between the signal conditioning module and the intracranial pressure monitor 160. The display module 150 communicates with the controller module 110 and is used to output temperature and pressure signals under the control of the controller module, and to receive control signals input by the user and send them to the controller module 110.

[0033] In an embodiment of the present application, the controller module 110 may adopt a microcontroller unit (MCU), a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), etc., and the present application does not impose any restrictions on this.

[0034] In the embodiment of the present application, the pressure acquisition unit 121 employs a full-bridge structure. Each arm of the full-bridge structure is provided with a first resistor R1, and each arm is connected in parallel to a first digital potentiometer P1. Furthermore, the connection points of two opposing bridge arms in one pair serve as power terminals, while the connection points of two opposing bridge arms in another pair serve as input and output terminals. Specifically, the power terminal includes a first constant voltage terminal Vref1 and a ground terminal GND, and the input and output terminals include an input terminal NN and an output terminal NP.

[0035] In the embodiment of the present application, the voltage input to the first constant voltage terminal Vref1 is set according to the specific application scenario and the analog-to-digital converter (ADC) inside the controller module 110, and the present application does not limit this.

[0036] In the embodiment of the present application, the first resistor R1 provided on each bridge arm is a fixed resistor, and the resistance value of the first resistor R1 provided on each bridge arm may be the same.

[0037] By adjusting the first digital potentiometer P1 on each bridge arm, signal output can be adjusted for different pressures, and the bridge's balance can be dynamically adjusted under different pressure conditions. This means that when the pressure acquisition unit 121 is subjected to external pressure, the bridge can be fine-tuned in real time to compensate for non-ideal factors, thereby eliminating inherent defects such as temperature drift, zero-point drift, and nonlinearity in the pressure acquisition unit 121. This helps improve the simulator's measurement accuracy and ensures that the output signal accurately reflects actual pressure changes.

[0038] The use of a digital potentiometer in pressure acquisition unit 121 offers greater flexibility than traditional mechanical potentiometers. Users can program different operating modes or calibration parameters based on specific application requirements without physically accessing the device's internal components. Furthermore, the digital potentiometer can store configuration information and automatically restore to the previous settings after a system restart, reducing the need for recalibration while ensuring that pressure control accuracy meets requirements.

[0039] By combining the first resistor R1 with the digital potentiometer P1 , even if environmental conditions change (such as pressure fluctuations), the digital potentiometer can be compensated through a software algorithm, thereby maintaining the consistency and reliability of the bridge output.

[0040] In the embodiment of the present application, the temperature acquisition unit 122 comprises a second digital potentiometer P2, a second resistor R2 and a third resistor R3, the first end of the second digital potentiometer P2 is connected to the second constant voltage end Vref2, the first end of the second resistor R2 is connected to the second end of the second digital potentiometer P2, the first end of the third resistor R3 is connected to the second end of the second resistor R2, the second end of the third resistor R3 is connected to the ground GND, and the second resistor R2 and the third resistor R3 are both fixed resistors. Specifically, the second end of the second resistor R2 serves as the output end of the temperature acquisition unit 122.

[0041] In the embodiment of the present application, the voltage input by the second constant voltage end Vref2 is set according to the specific application scenario and the analog-to-digital converter (ADC) inside the controller module 110, and the voltage input by the second constant voltage end Vref2 can be the same as or different from the voltage input by the first constant voltage end Vref1, which is not limited in the present application.

[0042] In the embodiment of the present application, the resistance value of the second resistor R2 is equal to the resistance value corresponding to the lowest temperature to be measured by the temperature acquisition unit 122, and the maximum resistance value of the second digital potentiometer P2 should be close to the resistance value corresponding to the highest temperature to be measured by the temperature acquisition unit 122. By connecting the second resistor R2 and the second digital potentiometer P2 in series, the temperature acquisition unit 122 can measure all temperatures within the required temperature range.

[0043] By using a digital potentiometer in the temperature acquisition unit 122, compared with a traditional mechanical potentiometer, it has higher flexibility. Users can program and set different working modes or calibration parameters according to the requirements of specific application scenarios, without the need for physical contact with internal components of the device. In addition, the digital potentiometer can also store configuration information and automatically restore to the previous settings after system restart, reducing the workload of recalibration and ensuring that the temperature control accuracy meets the requirements.

[0044] By using the combination of the second resistor R2 and the digital potentiometer P1, even if the environmental conditions change (for example, temperature fluctuation), the digital potentiometer can be compensated through software algorithm, so that the consistency and reliability of the output end of the temperature acquisition unit 122.

[0045] In the embodiment of the present application, the aforementioned signal conditioning module 130 can use a MEMS conditioning chip, or can use traditional discrete components or integrated ASIC (application specific integrated circuit) to realize, which is not limited in the present application.

[0046] In the embodiments of the present application, the signal conditioning module 130 converts the pressure signal output by the pressure acquisition unit 121 and the temperature signal acquired by the temperature acquisition unit 122 into digital signals, and then amplifies and conditions the signals through an electronic circuit, and finally outputs the signals to the controller module 110 or to the intracranial pressure monitor 160 through the output interface 140.

[0047] In the embodiments of the present application, in the process of the controller module 110 controlling the signal conditioning module 130 to output the conditioned signals through the selected channel, first, the controller module 110 selects the first channel or the second channel as the channel through which the signal conditioning module 130 outputs the signals, wherein the first channel is used to realize the communication between the signal conditioning module 130 and the controller module 110, and the second channel is used to realize the communication between the signal conditioning module 130 and the intracranial pressure monitor 160 through the output interface 140. Then, the signal conditioning module 130 outputs the conditioned signals to the controller module 110 or to the intracranial pressure monitor 160 through the output interface 140 through the selected channel.

[0048] In the embodiments of the present application, the output interface 140 can be selected according to the types of the devices used by the signal conditioning module 130 and the intracranial pressure monitor 160 and the actual needs, which are not limited in the present application.

[0049] In the embodiments of the present application, the display module 150 can adopt an LCD display screen, an LED display screen, etc., which are not limited in the present application.

[0050] In summary, through the intracranial physiological parameter test simulator provided as above, the embodiments of the present application can exclude the errors caused by the probe itself by using the intracranial physiological parameter test simulator to replace the probe of the intracranial pressure monitor, and can obtain more accurate pressure data by using a full-bridge structure for the pressure acquisition unit, wherein each bridge arm of the full-bridge structure is provided with a first resistor, and each bridge arm is connected in parallel with a first digital potentiometer, so as to eliminate the defects such as temperature drift, zero-point drift and nonlinearity of the pressure acquisition unit itself. Further, in some embodiments, the use of the second digital potentiometer in the temperature acquisition unit can make the temperature control accuracy meet the requirements.

[0051] The embodiments of the present application also provide an intracranial physiological parameter test method, which uses the aforementioned intracranial physiological parameter test simulator 100 to test the intracranial physiological parameters.

[0052] Figure 3 An exemplary flowchart of the intracranial physiological parameter test method 300 of the embodiments of the present application is shown.

[0053] As Figure 3As shown, in step S310, the controller module selects the first channel as the output channel of the signal conditioning module, wherein the first channel is used to realize communication between the signal conditioning module and the controller module.

[0054] In an embodiment of the present application, when the controller module selects the first channel as the output channel of the signal conditioning module, the signal conditioning module sends the conditioned pressure signal and temperature signal to the controller module.

[0055] After executing step S310, in step S320, a first resistance value table corresponding to the pressure acquisition unit when the signal conditioning module outputs all pressures within the set pressure range is formed in the controller module, and a second resistance value table corresponding to the temperature acquisition unit when the signal conditioning module outputs all temperatures within the set temperature range is formed in the controller module.

[0056] In the embodiment of the present application, the specific process of forming the first resistance table corresponding to the pressure acquisition unit when the signal conditioning module outputs all pressures within the set pressure range in the controller module can be referred to. Figure 4 .

[0057] Figure 4 An exemplary flow chart of forming a first resistance table according to an embodiment of the present application is shown.

[0058] like Figure 4 As shown, in step S410, the controller module adjusts the resistance of the first digital potentiometer on each bridge arm in the pressure acquisition unit so that after the signal output by the pressure acquisition unit is conditioned by the signal conditioning module, the output pressure value of the signal conditioning module increases by a unit pressure value compared to the previous value. In step S420, it is determined whether the current output pressure value of the signal conditioning module is within the set pressure range. In response to the current output pressure value of the signal conditioning module being within the set pressure range, in step S430, the resistance value on each bridge arm in the current pressure acquisition unit is recorded in the controller module, and the process returns to step S410, and steps S410 and S420 are executed again until the current output pressure value of the signal conditioning module is no longer within the set pressure range. In response to the current output pressure value of the signal conditioning module being no longer within the set pressure range, in step S440, a first resistance table corresponding to the pressure acquisition unit is formed based on the resistance values ​​recorded each time.

[0059] In some embodiments of the present application, the unit pressure value is 0.1 mmHg and the set pressure range is -100 mmHg to +100 mmHg. In other embodiments of the present application, the unit pressure value and the set pressure range can also be set according to actual needs and application scenarios, and the present application does not limit them here.

[0060] In the embodiments of the present application, the resistance value on each bridge arm in the pressure acquisition unit is obtained by calculating the resistance value of the first resistor R1 and the resistance value of the first digital potentiometer P1 on each bridge arm in the pressure acquisition unit. Specifically, since the first resistor R1 is connected in parallel with the first digital potentiometer P1, the resistance value on each bridge arm in the pressure acquisition unit is R 压 =R1P1 / (R1+R2).

[0061] In the embodiments of the present application, during the recording process of the resistance value on each bridge arm in the current pressure acquisition unit in the controller module, the controller module records the resistance value on each bridge arm using the internal memory of the controller module. Specifically, the internal memory of the controller module can use a Flash memory, and the present application does not limit this.

[0062] In the embodiments of the present application, by adjusting the digital potentiometer on each bridge arm step by step, each adjustment can increase the output of the signal conditioning module by one unit of pressure value. This method can achieve very fine calibration and ensure accurate measurement results even under small pressure changes.

[0063] In the embodiments of the present application, by recording the resistance value on each bridge arm when the output pressure value of the signal conditioning module is within the set range, and forming a first resistance value table through multiple iterations, the first resistance value table can be used for subsequent fast calibration of the pressure acquisition unit.

[0064] In the embodiments of the present application, since each adjustment is based on feedback control of actual measurement data, this method helps to eliminate the error accumulation problem caused by factors such as temperature drift, zero drift, and nonlinearity. By forming the first resistance value table, even if the environmental conditions change, the pressure acquisition unit can maintain high measurement accuracy and stability.

[0065] In the embodiments of the present application, the specific process of forming the second resistance value table corresponding to the temperature acquisition unit when the signal conditioning module outputs all temperatures within the set temperature range in the controller module can be referred to in Figure 5 .

[0066] Figure 5 An exemplary flowchart of forming the second resistance value table according to the embodiments of the present application is shown.

[0067] As Figure 5As shown, in step S510, the controller module adjusts the resistance value corresponding to the temperature acquisition unit, so that the signal output by the temperature acquisition unit is adjusted by the signal conditioning module, and the output temperature value of the signal conditioning module is increased by a unit temperature value compared with the previous time. In step S520, it is judged whether the output temperature value of the current signal conditioning module is within the set temperature range. In response to the output temperature value of the current signal conditioning module being within the set temperature range, in step S530, the resistance value corresponding to the current temperature acquisition unit is recorded in the controller module, and returns to step S510, and step S510 and step S520 are executed again until the output temperature value of the current signal conditioning module is not within the set temperature range. In response to the output temperature value of the current signal conditioning module not being within the set temperature range, in step S540, a second resistance value table corresponding to the temperature acquisition unit is formed based on the recorded resistance values.

[0068] In the embodiments of the present application, in the process of adjusting the resistance value corresponding to the temperature acquisition unit by the controller module, the resistance value of the second digital potentiometer in the temperature acquisition unit is adjusted by the controller module to realize the adjustment of the resistance value corresponding to the temperature acquisition unit.

[0069] In some embodiments of the present application, the unit temperature value is 0.1℃, and the set temperature range is 10℃-50℃. In other embodiments of the present application, the unit temperature value and the set temperature range can also be set according to actual needs and application scenarios, which are not limited in the present application.

[0070] In the embodiments of the present application, the resistance value corresponding to the temperature acquisition unit is obtained by calculating the resistance value of the second digital potentiometer and the resistance value of the second resistor. Specifically, since the second digital potentiometer is connected in series with the second resistor, the resistance value corresponding to the temperature acquisition unit is R 温 =R2+P2.

[0071] In the embodiments of the present application, in the process of recording the resistance value corresponding to the current temperature acquisition unit in the controller module, the controller module records the resistance value corresponding to the temperature acquisition unit by using the internal memory of the controller module. Specifically, the internal memory of the controller module can use a Flash memory, etc., which is not limited in the present application.

[0072] In the embodiments of the present application, by gradually adjusting the resistance value of the second digital potentiometer in the temperature acquisition unit, each adjustment can make the output of the signal conditioning module increase by a unit temperature value. This method can realize very fine calibration and ensure accurate measurement results even under small temperature changes.

[0073] In an embodiment of the present application, when the signal conditioning module's output temperature value is within a set range, the controller module records the resistance value corresponding to the current temperature acquisition unit. Over multiple iterations, a second resistance table is generated, which can be used for rapid calibration of subsequent temperature acquisition units. This second resistance table ensures that the temperature acquisition unit maintains high measurement accuracy and stability even when environmental conditions change.

[0074] After step S320 is executed, in step S330, the pressure and temperature required to be output by the intracranial physiological parameter test simulator are obtained.

[0075] In an embodiment of the present application, the user inputs the pressure and temperature required to be output by the intracranial physiological parameter test simulator through the aforementioned display module, and the display module sends the pressure and temperature required to be output by the intracranial physiological parameter test simulator input by the user to the controller module.

[0076] After executing step S330, in step S340, the controller module queries the first resistance table and the second resistance table for the resistance value required to be adopted by the pressure acquisition unit and the resistance value required to be adopted by the temperature acquisition unit based on the required output pressure and temperature, and controls the pressure acquisition unit and the temperature acquisition unit to output the target pressure signal and the target temperature signal to the signal conditioning module respectively based on the resistance value required to be adopted by the pressure acquisition unit and the resistance value required to be adopted by the temperature acquisition unit.

[0077] In the embodiment of the present application, the configuration of the pressure acquisition unit and the temperature acquisition unit is determined by the resistance values ​​in the first resistance table and the second resistance table, which ensures the consistency and reliability of each measurement, greatly improves the accuracy of the measurement results, eliminates the errors caused by the simulator itself, and makes verification easier.

[0078] After executing step S340, in step S350, the controller module selects the second channel as the output channel of the signal conditioning module, and the signal conditioning module conditions the target pressure signal and the target temperature signal and outputs them through the second channel, wherein the second channel is used to realize communication between the signal conditioning module and the intracranial pressure monitor through the output interface.

[0079] In an embodiment of the present application, the signal conditioning module conditions the target pressure signal and the target temperature signal, and outputs them to the intracranial pressure monitor through the second channel, so that the intracranial pressure monitor can obtain more accurate pressure data and temperature data.

[0080] While several embodiments of the application have been shown and described herein, it will be obvious to those skilled in the art that many changes, modifications, and substitutions can be made to the embodiments without departing from the spirit and scope of the application. It is to be understood that various alternatives to the embodiments of the application described herein can be employed in practicing the application. The appended claims are intended to cover all such alternatives as would be included within the spirit and scope of the application.

Claims

1. An intracranial physiological parameter test simulator, characterized in that, The simulator comprises a controller module, a signal acquisition module and a signal conditioning module; The controller module controls the signal acquisition module to acquire signals, and the signal conditioning module conditions the signals acquired by the signal acquisition module, and the controller module controls the signal conditioning module to output the conditioned signals through a selected channel; The signal acquisition module comprises a pressure acquisition unit and a temperature acquisition unit, the pressure acquisition unit is configured to acquire intracranial pressure signals, and the temperature acquisition unit is configured to acquire intracranial temperature signals; The pressure acquisition unit adopts a full-bridge structure, each bridge arm of the full-bridge structure is provided with a first resistor, and each bridge arm is connected in parallel with a first digital potentiometer; The simulator further comprises an output interface; In the process that the controller module controls the signal conditioning module to output the conditioned signals through a selected channel, the following steps are performed: The controller module selects a first channel or a second channel as the channel through which the signal conditioning module outputs signals, wherein the first channel is configured to realize communication between the signal conditioning module and the controller module, and the second channel is configured to realize communication between the signal conditioning module and an intracranial pressure monitor through the output interface; The signal conditioning module outputs the conditioned signals to the controller module through the selected channel or outputs the conditioned signals to the intracranial pressure monitor through the output interface; In the process that the intracranial physiological parameter test simulator performs intracranial physiological parameter test, the following steps are performed: In the controller module, a first resistance value table corresponding to the pressure acquisition unit when the signal conditioning module outputs all pressures in a set pressure range is formed, and in the controller module, a second resistance value table corresponding to the temperature acquisition unit when the signal conditioning module outputs all temperatures in a set temperature range is formed; The required output pressure and temperature of the intracranial physiological parameter test simulator are obtained; The controller module queries the resistance value required by the pressure acquisition unit and the resistance value required by the temperature acquisition unit in the first resistance value table and the second resistance value table based on the required output pressure and temperature, and controls the pressure acquisition unit and the temperature acquisition unit to output target pressure signals and target temperature signals to the signal conditioning module based on the resistance value required by the pressure acquisition unit and the resistance value required by the temperature acquisition unit; In the process that the controller module forms the first resistance value table corresponding to the pressure acquisition unit when the signal conditioning module outputs all pressures in a set pressure range, the following steps are performed: The controller module adjusts the resistance value of the first digital potentiometer on each bridge arm of the pressure acquisition unit, so that the output pressure value of the signal conditioning module increases by a unit pressure value compared with the previous time after the signal output by the pressure acquisition unit is conditioned by the signal conditioning module; It is judged whether the output pressure value of the signal conditioning module at present is in the set pressure range; In response to the output pressure value of the signal conditioning module being within the set pressure range, the resistance value of each bridge arm of the pressure acquisition unit is recorded in the controller module, and the step of adjusting the resistance value of the first digital potentiometer of each bridge arm of the pressure acquisition unit is returned to; In response to the output pressure value of the signal conditioning module not being within the set pressure range, a first resistance table corresponding to the pressure acquisition unit is formed based on the recorded resistance values; In the process of forming a second resistance table corresponding to the temperature acquisition unit at all temperatures of the signal conditioning module in the output set temperature range in the controller module, the following steps are performed: The controller module adjusts the resistance value corresponding to the temperature acquisition unit, so that the output signal of the temperature acquisition unit is conditioned by the signal conditioning module, and the output temperature value of the signal conditioning module is increased by a unit temperature value compared with the previous time; determining whether the output temperature value of the signal conditioning module is within the set temperature range; In response to the output temperature value of the signal conditioning module being within the set temperature range, the resistance value corresponding to the temperature acquisition unit is recorded in the controller module, and the step of adjusting the resistance value corresponding to the temperature acquisition unit is returned; In response to the output temperature value of the signal conditioning module not being within the set temperature range, a second resistance table corresponding to the temperature acquisition unit is formed based on the recorded resistance values.

2. The intracranial physiological parameter test simulator of claim 1, wherein, The first resistance is a fixed resistance.

3. The intracranial physiological parameter test simulator of claim 1, wherein, The temperature acquisition unit includes a second digital potentiometer, a second resistance and a third resistance, the first end of the second digital potentiometer is connected to a direct current power supply, the first end of the second resistance is connected to the second end of the second digital potentiometer, the first end of the third resistance is connected to the second end of the second resistance, the second end of the third resistance is connected to the ground, and the second resistance and the third resistance are fixed resistances.

4. The intracranial physiological parameter test simulator of claim 3, wherein, The second end of the second resistance serves as the output end of the temperature acquisition unit.

5. The intracranial physiological parameter test simulator of claim 1, wherein, The simulator further includes a display module for outputting temperature signals and pressure signals under the control of the controller module.

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