WO2021134351A1

WO2021134351A1 - Anesthetic vaporizer and liquid level monitoring method

Info

Publication number: WO2021134351A1
Application number: PCT/CN2019/130184
Authority: WO
Inventors: 王征; 艾世明; 王从权; 田克行
Original assignee: 深圳迈瑞生物医疗电子股份有限公司
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-07-08
Also published as: CN114845761A

Abstract

An anesthetic vaporizer and a liquid level monitoring method. The anesthetic vaporizer comprises an anesthetic storage tank (1), an anesthetic vaporization device, a controller (101), and a first detection device (102) which detects the liquid level of an anesthetic liquid in the anesthetic storage tank (1); the anesthetic vaporization device is connected to the anesthetic storage tank (1); the first detection device (102) is disposed on the anesthetic storage tank (1), and the first detection device (102) detects the state of the anesthetic at a first set position (8) in the anesthetic storage tank (1) and outputs first detection information; the controller (101) is connected to the first detection device (102), and outputs alarm information when determining according to the first detection information that there is no anesthetic at the first set position (8) in the anesthetic storage tank (1).

Description

Anesthesia vaporizer and liquid level monitoring method

Technical field

The invention relates to an evaporator liquid level monitoring technology, in particular to an anesthesia evaporator and a liquid level monitoring method.

Background technique

During the operation, due to the heavy work of the anesthesiologist, the remaining amount of medicine in the anesthesia vaporizer pool is likely to be ignored; when the remaining amount of medicine in the vaporizer pool is insufficient and the medicine is not added in time, it is very likely that the patient will wake up during the operation. Come for medical malpractice.

Summary of the invention

In order to solve the above technical problems, embodiments of the present invention provide an anesthesia vaporizer and a liquid level monitoring method.

The embodiment of the present invention provides an anesthesia vaporizer, including an anesthesia storage tank, an anesthesia vaporization device, a controller, and a first detection device for detecting the liquid level of anesthetic medicine in the anesthesia storage tank;

An anesthesia evaporation device, connected to the anesthesia storage tank;

The first detection device is arranged on the anesthesia storage tank, and the first detection device detects the state of the anesthetic at a first set position in the anesthesia storage tank, and outputs first detection information;

The controller is connected with the first detection device, judges that there is no anesthetic in the first set position of the anesthesia storage tank according to the first detection information, and outputs alarm information.

Optionally, the first detection device includes one or more of an ultrasonic sensor, a differential pressure detection device, a Hall sensor, a magnetic induction sensor, a capacitance sensor, and a linear variable differential transformer (LVDT).

Optionally, when the first detection device includes the ultrasonic sensor, the first detection device includes a first ultrasonic generator and a first ultrasonic receiver that are arranged oppositely, and the first set position is at the first ultrasonic sensor. On the propagation path of an ultrasonic generator and the first ultrasonic receiver.

Optionally, when the first detection device includes the differential pressure detection device, the first detection device detects the pressure of the first sampling point and the second sampling point, and the first sampling point and the second sampling point correspond to For different liquid level heights, the first sampling point is not higher than the first set position, and the second sampling point is not lower than the first set position.

Optionally, when the first detection device includes the Hall sensor and/or the magnetic induction sensor, the first detection device includes a first positioning element floating on the liquid surface of the anesthetic liquid, and The first sensor set near the location.

Optionally, when the first detection device includes the Hall sensor, the first sensor is a Hall induction device; when the first detection device includes the magnetic induction sensor, the first sensor is Magnetic induction proximity switch.

Optionally, when the first detection device includes the capacitance sensor, the first detection device includes a capacitance sensor electrode located inside the anesthesia storage tank or on the surface of the anesthesia storage tank.

Optionally, the first detection device includes an LVDT located inside the anesthetic storage tank, and the LVDT of the first detection device is provided with a first floating structure that changes with the height of the liquid.

Optionally, the anesthesia vaporizer further includes:

The second detection device detects and outputs level information of the anesthetic liquid in the anesthesia storage tank.

Optionally, the second detection device includes one or more of a capacitance sensor, a differential pressure detection device, an ultrasonic sensor, or an LVDT.

Optionally, the anesthesia vaporizer further includes:

The third detection device detects the state of the anesthetic at the second set position in the anesthesia storage tank, and outputs second detection information; the second set position is different from the first set position.

Optionally, the controller further performs calibration on the second detection device according to the first detection information and the second detection information.

Optionally, the third detection device includes one or more of an ultrasonic sensor, a differential pressure detection device, a Hall sensor, a magnetic induction sensor, a capacitance sensor, and an LVDT.

The embodiment of the present invention also provides a liquid level detection method, which is applied to an anesthesia vaporizer, and the anesthesia vaporizer includes an anesthesia storage tank, an anesthesia vaporization device, a controller, and a device for detecting the liquid level of anesthetic medicine in the anesthesia storage tank. A first detection device; an anesthesia evaporation device is connected to the anesthesia storage tank; the first detection device is provided on the anesthesia storage tank; the controller is connected to the first detection device, and the method includes:

The first detection device detects the state of the anesthetic at the first set position in the anesthesia storage tank, and outputs first detection information;

The controller determines that there is no anesthetic in the first set position of the anesthesia storage tank according to the first detection information, and outputs an alarm message.

Optionally, the first detection device includes one or more of an ultrasonic sensor, a differential pressure detection device, a Hall sensor, a magnetic induction sensor, a capacitance sensor, and an LVDT.

Optionally, when the first detection device includes the Hall sensor and/or the magnetic induction sensor, the first detection device includes a first positioning element floating on the liquid surface of the anesthetic liquid, and The first sensor set at the location.

Optionally, the anesthesia vaporizer further includes a second detection device, and the method further includes: the second detection device detects and outputs level information of the anesthetic liquid in the anesthesia storage tank.

Optionally, the anesthesia vaporizer further includes a third detection device;

The method further includes: the third detection device detects the state of the anesthetic at the second set position in the anesthesia storage tank, and outputs second detection information; the second set position and the first set position different.

Optionally, the method further includes: the controller further calibrating the second detection device according to the first detection information and the second detection information.

In the anesthesia vaporizer and liquid level monitoring method provided by the embodiments of the present invention, the anesthesia vaporizer includes an anesthesia storage tank, an anesthesia vaporization device, a controller, and a first detection device for detecting the liquid level of anesthetic medicine in the anesthesia storage tank; an anesthesia vaporization device, Connected with the anesthesia storage tank; the first detection device is arranged on the anesthesia storage tank, the first detection device detects the state of the anesthetic at the first set position in the anesthesia storage tank, and outputs the first detection information; the controller and the first detection device Connect, judge that there is no anesthetic in the first set position in the anesthesia storage tank according to the first detection information, and output alarm information. In this way, the embodiment of the present invention can promptly remind dosing through alarm information when the anesthetic liquid level in the anesthesia storage tank is low, which is beneficial to improve the medication safety of the anesthesia vaporizer.

Description of the drawings

FIG. 1 is a schematic diagram of the first circuit structure related to an anesthesia vaporizer in an embodiment of the present invention;

Fig. 2 is a flowchart of a liquid level monitoring method according to an embodiment of the present invention;

3 is a schematic diagram of the second circuit structure related to the anesthesia vaporizer in the embodiment of the present invention;

4 is a schematic diagram of a first scenario for realizing liquid level detection in an embodiment of the present invention;

Fig. 5 is a schematic diagram of a second scenario for realizing liquid level detection in an embodiment of the present invention;

6 is a schematic diagram of the structure of an ultrasonic sensor according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a third scenario for realizing liquid level detection in an embodiment of the present invention;

FIG. 8 is a schematic diagram of a fourth scenario for realizing liquid level detection in an embodiment of the present invention;

9 is a schematic diagram of a fifth scenario for realizing liquid level detection in an embodiment of the present invention;

FIG. 10 is a schematic diagram of a sixth scenario for realizing liquid level detection in an embodiment of the present invention;

11 is a schematic diagram of a seventh scenario for realizing liquid level detection in an embodiment of the present invention;

12 is a schematic diagram of a third circuit structure related to an anesthesia vaporizer according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of an eighth scenario for realizing liquid level detection according to an embodiment of the present invention;

14 is a schematic diagram of a fourth circuit structure related to an anesthesia vaporizer according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of a ninth scene for realizing liquid level detection according to an embodiment of the present invention.

Detailed ways

In order to understand the features and technical content of the embodiments of the present invention in more detail, the implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference and description purposes only, and are not used to limit the embodiments of the present invention.

The embodiment of the present invention provides an anesthesia vaporizer and a liquid level detection method. The liquid level monitoring method can be implemented based on the anesthesia vaporizer described above. The anesthesia vaporizer includes an anesthesia storage tank, an anesthesia vaporizer, a controller, and a first detection device; Here, the anesthetic liquid is stored in the anesthesia storage tank, and the first detection device is used to detect the liquid level of the anesthetic liquid in the anesthesia storage tank; the anesthetic evaporation device is connected to the anesthesia storage tank and is used to evaporate the anesthetic liquid in the anesthesia storage tank; The detection device is arranged on the anesthesia storage tank. Regarding the implementation in which the first detection device is arranged in the anesthesia storage tank, for example, the first detection device may be arranged inside the anesthesia storage tank or outside the anesthesia storage tank. In a specific implementation, when the first detection device is arranged outside the anesthesia storage tank, the first detection device may be connected to the anesthesia storage tank through a communicating device, which is a part of the anesthesia storage tank.

FIG. 1 is a schematic diagram of the first circuit structure related to the anesthesia vaporizer in the embodiment of the present invention. As shown in FIG. 1, the controller 101 is connected to the first detection device 102. Illustratively, the signal receiving end of the controller 101 is connected to the first detection device. The signal output terminal of the detection device 102.

In practical applications, the aforementioned controller 101 may be a circuit with a comparison function such as a comparator, such as a specific integrated circuit (ASIC), a digital signal controller (Digital Signal Processor, DSP), and a digital signal processing device. (Digital Signal Processing Device, DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (Field Programmable Gate Array, FPGA), Central Processing Unit (CPU), Controller, Micro At least one of the controllers. In addition, the above-mentioned controller 101 may also be implemented based on an analog circuit.

When the first detection device 102 is arranged inside the anesthesia storage tank, if the first detection device 102 needs to contact the anesthetic in the anesthesia storage tank, the material of the part of the first detection device 102 that needs to contact the anesthetic in the anesthesia storage tank 1 can be Polyphenylene sulfide (PPS), polyphenylene sulfone resins (PPSU), polyformaldehyde (POM), polytetrafluoroethylene (PTFE), stainless steel, etc. The first detection device 102 may be enclosed by a cover made of the above-mentioned materials.

Fig. 2 is a flowchart of a liquid level monitoring method according to an embodiment of the present invention. As shown in Fig. 2, the process may include:

Step 201: The first detection device detects the state of the anesthetic at the first set position in the anesthesia storage tank, and outputs first detection information.

In actual implementation, the first detection device 102 can detect the state of the anesthetic at the first set position in the anesthesia storage tank, and output the first detection information; understandably, the first detection information may indicate that there is an anesthetic at the first set position or There is no anesthetic in the first set position. In one embodiment, when there is no anesthetic in the first set position, it can be considered that there is less anesthetic in the anesthesia storage tank and anesthetic needs to be added. In this article, the first setting position corresponds to the first liquid level height in the anesthesia storage tank, and the first setting position can be any position on the first liquid level height.

Step 202: The controller determines that there is no anesthetic at the first set position in the anesthesia storage tank according to the first detection information, and outputs an alarm message.

In practical applications, the controller 101 can determine whether there is anesthetic at the first set position in the anesthesia storage tank according to the first detection information, and can output alarm information when it is determined that there is no anesthetic at the first set position. In addition, when it is determined that there is anesthetic at the first set position, the first detection information may continue to be received.

Here, the alarm information may be at least one of a sound alarm signal and a light-emitting alarm signal.

Fig. 3 is a schematic diagram of the second circuit structure related to the anesthesia vaporizer in the embodiment of the present invention. Compared with Fig. 1, the alarm 103 and/or the display 104 are added in Fig. 3, and the controller 101 can control the alarm 103 to send out alarm information, or , The display 104 can be controlled to display alarm information. It should be noted that the display 104 is an optional device. For example, the display 104 can be removed on the basis of FIG. 3.

It can be seen that with the technical solution of the embodiment of the present invention, when the anesthetic liquid level in the anesthetic storage tank is low, the alarm information can be used to promptly remind the dosing of the drug, thereby helping to improve the medication safety of the anesthetic vaporizer.

In an embodiment, the first detection device 102 may include one or more of an ultrasonic sensor, a differential pressure detection device, a Hall sensor, a magnetic induction sensor, a capacitance sensor, and an LVDT.

It is understandable that the liquid level detection method can be divided into a single-point detection method and a multi-point liquid level detection method. The corresponding meaning of the single-point detection method is: to determine the current level and setting of the anesthetic liquid in the anesthesia storage tank The high-low relationship of the liquid level; the corresponding meaning of the multi-point liquid level detection is: determine the high-low relationship between the current liquid level of the anesthetic liquid in the anesthesia storage tank and multiple set liquid levels; optionally, the multi-point liquid level detection also includes Continuous liquid level detection. Through continuous liquid level detection, the current liquid level of the anesthetic liquid in the anesthesia storage tank can be directly obtained.

In the embodiment of the present invention, the first detection device 102 can detect the single-point liquid level of the anesthetic liquid in the anesthetic storage tank. In practical applications, one implementation of single-point liquid level monitoring using the first detection device may be: when the first detection device 102 includes a Hall sensor and/or a magnetic induction sensor, the position of the Hall sensor or the magnetic induction sensor is Determined according to the first set position, in this way, the single-point liquid level detection can be performed according to the Hall sensor or the magnetic induction sensor, so that it can directly determine whether there is anesthetic at the first set position in the anesthesia storage tank; when the first detection device 102 includes When one or more of the differential pressure detection device, capacitance sensor and LVDT is used, one or more of the differential pressure detection device, capacitance sensor and LVDT can be used to perform continuous liquid level detection to determine the current anesthetic liquid in the anesthesia storage tank Then, the relationship between the current level of the anesthetic liquid in the anesthesia storage tank and the first set position can be judged, and then it can be determined whether there is an anesthetic in the first set position in the anesthesia storage tank; when the first detection device When 102 includes an ultrasonic sensor, the position of the ultrasonic sensor is determined according to the first set position. In one example, the single-point liquid level detection can be performed according to the ultrasonic sensor, so that it can directly determine whether the first set position in the anesthesia storage tank is There is anesthetic; in another example, the ultrasonic sensor can be used to perform continuous level detection to determine the current level of the anesthetic liquid in the anesthetic storage tank. Then, it can be judged that the current level of the anesthetic liquid in the anesthetic storage tank is different from the first The height relationship of a set position can then determine whether there is anesthetic at the first set position in the anesthesia storage tank.

Several implementations of the first detection device 102 are exemplarily described below.

Example 1: The first detection device 102 includes an ultrasonic sensor.

4 is a schematic diagram of a first scene of liquid level detection in an embodiment of the present invention, and FIG. 5 is a schematic diagram of a second scene of liquid level detection in an embodiment of the present invention; as shown in FIGS. 4 and 5, the first ultrasonic sensor 4 Set on the anesthesia storage tank 1, the anesthesia storage tank 1 contains an anesthetic liquid 3, and there is air 5 above the anesthetic liquid 3.

Fig. 6 is a schematic structural diagram of an ultrasonic sensor according to an embodiment of the present invention. Referring to Figs. 4 to 6, the ultrasonic sensor may include a first ultrasonic generator 6 and a first ultrasonic receiver 7 arranged oppositely, wherein the first ultrasonic generator 6 It is used to transmit ultrasonic signals, and the first ultrasonic receiver 7 is used to receive ultrasonic signals; here, the first set position is set on the propagation path of the first ultrasonic generator 6 and the first ultrasonic receiver 7; in one example, Referring to FIGS. 4 and 5, the first ultrasonic generator 6 and the first ultrasonic receiver 7 may be arranged in a position flush with the first set position 8.

In practical applications, the first ultrasonic generator 6 and the first ultrasonic receiver 7 can be assembled into the anesthesia storage tank 1 by means of structural restriction or glue bonding.

4, when the level of the anesthetic liquid 3 in the anesthesia storage tank 1 is higher than the first set position 8, the ultrasonic signal sent by the first ultrasonic generator 6 propagates in the anesthetic liquid 3; referring to FIG. 5, when the anesthesia is stored When the liquid level of the anesthetic liquid 3 in the tank 1 is lower than the first set position 8, the ultrasonic signal from the first ultrasonic generator 6 propagates in the air 5. Because the ultrasonic propagation impedance is different in different media, when the ultrasonic signal is in the anesthetic When propagating in the liquid 3, the ultrasonic signal received by the first ultrasonic receiver 7 is stronger, the corresponding mechanical vibration is larger, and the electric signal amplitude obtained by the conversion is larger; when the ultrasonic signal propagates in the air 5, the first ultrasonic signal The ultrasonic signal received by the ultrasonic receiver 7 is weak, the corresponding mechanical vibration is small, and the electric signal amplitude obtained by the conversion is small. Using this feature, it can be determined whether the current level of the anesthetic liquid 3 in the anesthesia storage tank 1 is below the first set position 8, and furthermore, it can be determined whether there is an anesthetic at the first set position 8 in the anesthesia storage tank 1; When the controller determines that there is no anesthetic at the first set position 8 in the anesthesia storage tank 1, it can output an alarm message.

Further, referring to FIG. 6, a first ultrasonic piezoelectric wafer 9 and a second ultrasonic piezoelectric wafer 10 may be built inside the first ultrasonic generator 6 and the first ultrasonic receiver 7, respectively (as shown in FIG. 3); An ultrasonic piezoelectric wafer 9 can convert electrical energy into mechanical energy to send out ultrasonic signals, and the second ultrasonic piezoelectric wafer 10 can receive ultrasonic signals through the conversion of mechanical energy to electrical energy. Ultrasonic piezoelectric chip has the characteristics of long life and high reliability; and the impedance of ultrasonic propagation in liquid and air is very different, and it is not affected by the adhesion of foreign objects on the sensor surface, and there is no need to calibrate the ultrasonic sensor, which can save anesthetics. And production hours.

It should be noted that in the embodiment of the present invention, the assembly method of the first ultrasonic sensor 4 is not limited to the vertical assembly shown in FIGS. 4 and 5; Three-scene schematic diagram, as shown in Fig. 7, the assembly direction of the first ultrasonic generator 6 and the first ultrasonic receiver 7 is the horizontal direction; Fig. 8 is a schematic diagram of the fourth scenario for realizing liquid level detection in the embodiment of the present invention, as shown in Fig. As shown in 8, the assembly manner of the first ultrasonic generator 6 and the first ultrasonic receiver 7 is an oblique assembly manner at a certain angle with the horizontal direction. Of course, the first ultrasonic generator 6 and the first ultrasonic receiver 7 can also be arranged on the inner or outer surface of the anesthesia storage tank 1, as long as the detected ultrasonic waves pass through any position on the first liquid level. When the liquid level is high and when there is no anesthetic, it is enough to detect the difference in the transmission time of the ultrasonic wave.

As an implementation method, the housing of the first ultrasonic sensor 4 and the anesthesia storage tank 1 can be processed in an integrated manner, which has the characteristics of simple processing; moreover, there is no risk of anesthetic leakage and no environmental pollution. , It will not harm the health of doctors.

As another implementation method, since the ultrasonic wave can propagate in metal, the ultrasonic sensor can adopt a metal casing, and the anesthesia storage tank 1 is provided with an opening to facilitate putting the ultrasonic sensor into the casing or taking it out of the casing through the opening.

Example 2: The first detection device 102 includes a capacitance sensor.

The first detection device includes a capacitance sensor electrode located inside the anesthesia storage tank 1 or on the surface of the anesthesia storage tank 1. Fig. 9 is a schematic diagram of a fifth scene for realizing liquid level detection in an embodiment of the present invention. As shown in Fig. 9, the electrodes of the first capacitance sensor 11 are arranged through the bottom to the top of the anesthesia storage tank 1. When the liquid level of the anesthetic liquid 3 is not At the same time, the capacitance values acquired by the first capacitance sensor 11 are also different. In this way, the current liquid level of the anesthesia storage tank 1 can be determined according to the capacitance value collected by the first capacitance sensor 11. Therefore, according to the meaning of single-point monitoring, the first capacitance value collected by the first capacitance sensor 11 can be determined. Set whether there is anesthetic at the set position 8; when the controller determines that there is no anesthetic at the first set position 8 in the anesthesia storage tank 1, an alarm message can be output.

If the anesthesia storage tank 1 is made of non-metallic material, the two electrodes of the capacitance sensor can be distributed above and below the outer surface of the anesthesia storage tank 1 to cover the measurement range. Of course, the two electrodes of the capacitance sensor can also be coaxial, built in the anesthesia storage tank 1 and run through the top to the bottom of the anesthesia storage tank, so that the liquid level to be measured falls between the sensor electrodes.

If the anesthesia storage tank 1 is made of metal, the two electrodes of the capacitance sensor can be coaxial, built in the anesthesia storage tank 1, running through the top to the bottom of the anesthesia storage tank, so that the liquid level to be measured falls between the sensor electrodes; The anesthesia storage tank 1 can also be used as the outer electrode of the capacitance sensor, and a metal electrode is built in the anesthesia storage tank 1 as the inner electrode, which runs through the top to the bottom of the anesthesia storage tank, so that the liquid level to be measured falls between the sensor electrodes.

Example 3: The first detection device 102 includes a differential pressure detection device.

Fig. 10 is a schematic diagram of a sixth scene for realizing liquid level detection in an embodiment of the present invention. As shown in Fig. 10, the differential pressure detection device 13 detects the pressure between two sampling points P3 and P4 corresponding to different liquid level heights, and passes through two samplings. The pressure difference changes at points P3 and P4 can determine whether there is anesthetic at the first setting position. The differential pressure detection device 13 has two sampling ports P1 and P2, which are connected to sampling points P3 and P4 by two sampling channels 14 respectively. The sampling point P3 and the sampling point P4 are both connected to the inside of the anesthesia storage tank 1, and the first set position 8 is between the sampling point P3 and the sampling point P4. The sampling point P3 may not be higher than the first set position 8, and the sampling point P4 may not be lower than the first set position 8.

In practical applications, the differential pressure detection device 13 calculates the current level of the anesthetic liquid 3 in the anesthesia storage tank 1 according to the pressure difference between the sampling points P3 and P4. Furthermore, according to the relationship between the current level of the anesthetic liquid 3 in the anesthesia storage tank 1 and the first set position, it can be determined whether there is an anesthetic at the first set position 8; when the controller determines that the first set in the anesthesia storage tank 1 When there is no anesthetic in position 8, an alarm message can be output.

Example 4: The first detection device 102 includes a Hall sensor and/or a magnetic induction sensor.

FIG. 11 is a schematic diagram of a seventh scenario for realizing liquid level detection in an embodiment of the present invention. As shown in FIG. 11, a channel for the first positioning element 16 to change with the liquid level can be established inside or outside the anesthesia storage tank 1 15. When the channel 15 is established outside the anesthesia storage tank 1, the channel 15 communicates with the inside of the anesthesia storage tank 1; here, the first positioning element 16 may be a float or other positioning elements, and the first positioning element 16 has a built-in magnet, and The density of the first element is lower than the density of the anesthetic, ensuring that the first positioning element 16 can float on the anesthetic liquid 3.

As shown in FIG. 11, a first sensor 17 can also be provided at the first setting position 8. Here, when the first detection device 102 includes the Hall sensor, the first sensor 17 is a Hall sensor device; When the first detection device 102 includes a magnetic induction sensor, the first sensor 17 is a magnetic induction proximity switch. When the liquid level of the anesthetic liquid 3 drops to the first set position 8, the magnet inside the first positioning element 16 triggers the first sensor 17 to generate a corresponding sensing signal. In this way, the controller can generate and output alarm information according to the sensing signal. Of course, the first sensor 17 can be arranged near the first setting position 8, as long as the anesthetic liquid level in the anesthesia storage tank is at the first setting position 8 and not at the first setting position 8, the first positioning element 16 It is enough to send different trigger signals to the first sensor.

Example 5: The first detection device 102 includes an LVDT.

The LVDT includes a first floating structure. The first floating structure inside the LVDT changes with the height of the liquid. The LVDT can output corresponding first detection information according to the position of the first floating structure. The first detection information indicates the current status of the anesthetic liquid 3. Liquid level; when the controller determines that there is no anesthetic at the first set position 8 in the anesthesia storage tank 1 according to the first detection information, it can output an alarm message.

Further, a second detection device can also be provided on the anesthesia storage tank 1. In actual implementation, the second detection device can be installed inside the anesthesia storage tank 1. If the second detection device needs to be in contact with the anesthetic in the anesthesia storage tank 1. The material of the part of the second detection device in contact with the anesthetic in the anesthesia storage tank 1 may be PPS, PPSU, POM, PTFE, stainless steel, etc.

FIG. 12 is a schematic diagram of the third circuit structure of the anesthesia vaporizer according to the embodiment of the present invention. Compared with FIG. 3, FIG. 12 adds a second detection device 105. Here, the signal receiving end of the controller 101 is connected to the second detection device 105 Signal output terminal.

In actual implementation, the above-mentioned liquid level monitoring method may further include: using the second detection device 105 to detect the current liquid level of the anesthetic liquid 3 in the anesthesia storage tank 1 and output the detected liquid level information. The level information of the anesthetic liquid 3 in the anesthetic storage tank 1 that can be detected by the second detection device 105 is sent to the controller 101; in this way, the controller 101 can learn the current level of the anesthetic liquid 3 in the anesthetic storage tank 1.

In practical applications, further, as an implementation manner, the controller 101 can visually present the anesthetic liquid 3 in the anesthesia storage tank 1 to the user through the display 104 after obtaining the current level of the anesthetic liquid 3 in the anesthesia storage tank 1. The current liquid level. It should be noted that the display 104 is an optional device. For example, the display 104 can be removed on the basis of FIG. 12. Of course, the second detection device 105 can also directly send the detected liquid level information to the display 104 for display. Alternatively, the controller 101 of the second detection device 105 may output the liquid level information to other information output devices, such as voice output devices, information transmission devices, and so on.

Further, the controller 101 can also determine whether the current liquid level of the anesthetic liquid 3 in the anesthesia storage tank 1 is lower than the preset low liquid level threshold according to the current liquid level output by the second detection 105, and if so, output a low liquid level alarm message , Prompting the user that the liquid level in the anesthesia evaporator is too low.

It can be seen that in the embodiment of the present invention, the first detection device 102 and the second detection device 105 can perform liquid level detection at the same time, which can prevent the low liquid level alarm from being unable to be performed when one of the detection devices fails, thereby increasing the power of the anesthesia vaporizer. Safety and reliability. In practical applications, the second detection device 105 may include one or more of a capacitance sensor, a differential pressure detection device, an ultrasonic sensor, and an LVDT.

In specific implementation, when the second detection device 105 includes a capacitance sensor, the second detection device includes a capacitance sensor electrode located inside the anesthesia storage tank 1 or on the surface of the anesthesia storage tank 1. In the second detection device 105, the capacitance sensor may be arranged at the bottom to the top of the anesthesia storage tank 1 through electrodes. When the liquid level of the anesthetic liquid 3 is different, the capacitance value obtained by the capacitance sensor 11 is also different; the second detection device 105 The current level of the anesthetic liquid 3 in the anesthetic storage tank 1 can be determined according to the capacitance value collected by the capacitance sensor 11; the second detection device 105 can send the current level of the anesthetic liquid 3 in the anesthetic storage tank 1 to the controller 101, When the controller 101 determines that the current liquid level is less than the first set position, it can output an alarm message. The alarm can be realized by sound, light, etc.

In practical applications, the sampling range of the two electrodes of the capacitive sensor covers the various liquid level heights of the anesthetic liquid 3 in the anesthesia storage tank 1, that is to say, no matter what the liquid level of the anesthetic liquid 3 in the anesthesia storage tank 1 is, The current level of the anesthetic liquid 3 in the anesthesia storage tank 1 can be obtained based on the capacitance value collected by the capacitance sensor. The setting of the capacitance sensor is as described above, and will not be repeated.

FIG. 13 is a schematic diagram of an eighth scene for realizing liquid level detection according to an embodiment of the present invention. As shown in FIG. 13, compared with FIG. 4, FIG. 13 adds a second capacitance sensor 18; in practical applications, it can be based on the second capacitance. The capacitance value collected by the sensor 18 determines the current level of the anesthetic liquid 3 in the anesthesia storage tank 1, and can calculate and display the remaining medicine to the user, and trigger an alarm; at the same time, the first ultrasonic sensor 4 and the second ultrasonic sensor 4 described above can be used. The capacitance sensor 18 jointly triggers the liquid level alarm to prevent any one of the sensors from failing to alarm in time due to failure, thereby increasing the safety and reliability of liquid level detection.

When the second detection device 105 includes a differential pressure detection device, the differential pressure detection device in the second detection device 105 detects the pressure between two sampling points located at different heights, and calculates the anesthesia storage based on the pressure difference between the two sampling points The level information of the anesthetic liquid 3 in the tank 1.

The range of the differential pressure detection device in the second detection device 105 covers the pressure range generated by the various liquid levels of the anesthetic liquid 3 in the anesthesia storage tank 1, that is to say, no matter what the height of the liquid level of the anesthetic liquid 3 in the anesthesia storage tank 1 is The current level of the anesthetic liquid 3 in the anesthesia storage tank 1 can be obtained based on the pressure difference collected by the differential pressure detection device. The setting of the pressure difference detection device is as described above, and will not be repeated.

Further, the second detection device 105 can send the detected liquid level information of the anesthetic liquid 3 in the anesthesia storage tank 1 to the controller 101, and the controller 101 can output an alarm when judging that the current liquid level is less than the first set position information.

When the second detection device 105 includes an ultrasonic sensor, the second detection device includes a second ultrasonic generator and a second ultrasonic receiver arranged oppositely, the second ultrasonic generator is used to transmit ultrasonic signals, and the second ultrasonic receiver is used to receive ultrasonic signals . In one example, the ultrasonic signal transmitted by the second ultrasonic generator is received by the second ultrasonic receiver after passing the anesthetic liquid in the anesthesia storage tank, and the second detection device 105 can calculate the anesthetic in the anesthetic storage tank according to the propagation time of the ultrasonic signal. The height of the liquid level. At least one of the second ultrasonic generator and the second ultrasonic receiver is provided inside the anesthesia storage tank 1.

In another embodiment, the second ultrasonic generator and the second ultrasonic receiver may not be arranged oppositely, the ultrasonic signal emitted by the second ultrasonic generator may be reflected after reaching the interface between the anesthetic liquid and the air, and the second ultrasonic receiver The reflected signal is received, and further, the current level of the anesthetic liquid 3 in the anesthesia storage tank 1 can be determined according to the time difference between the transmitted ultrasonic signal and the received ultrasonic signal. The second detection device 105 can send the current level of the anesthetic liquid 3 in the anesthesia storage tank 1 to the controller 101, and the controller 101 can output an alarm message when it determines that the current level is less than the first set position.

Here, the measurement range of the second ultrasonic generator and the second ultrasonic receiver covers various liquid level heights of the anesthetic liquid in the anesthesia storage tank, that is, no matter the liquid level of the anesthetic liquid 3 in the anesthesia storage tank 1 is The current level of the anesthetic liquid 3 in the anesthesia storage tank 1 can be obtained based on the pressure difference collected by the ultrasonic sensor.

As an implementation manner, the second ultrasonic generator and the second ultrasonic receiver can be provided with ultrasonic piezoelectric wafers. The ultrasonic piezoelectric wafer in the second detection device 105 has the same function as the ultrasonic piezoelectric wafer in the first detection device 102. , I won’t repeat it here.

As an implementation method, the housing of the ultrasonic sensor in the second detection device and the anesthesia storage tank 1 can be processed in an integrated manner, which has the characteristics of simple processing; moreover, there is no risk of leakage of anesthetics, and it will not cause Environmental pollution will not harm the health of doctors.

As another implementation method, since ultrasonic waves can propagate in metal, the ultrasonic sensor in the second detection device can adopt a metal shell, and the anesthesia storage tank 1 is provided with an opening to facilitate the placement of the ultrasonic sensor in the second detection device through the opening. Into or out of the enclosure.

When the second detection device 105 includes an LVDT, the LVDT in the second detection device 102 includes a second floating structure. The second floating structure inside the LVDT changes with the change of the liquid level. The LVDT outputs correspondingly according to the position of the second floating structure. When the controller 101 determines that the current liquid level is less than the first set position, it can output an alarm message. The measurement range of the LVDT in the second detection device 102 covers various liquid level heights of the anesthetic liquid in the anesthetic storage tank.

Further, a third detection device may be provided in the anesthesia vaporizer, and the third detection device may detect the state of the anesthetic at the second set position in the anesthesia storage tank, and the second set position is different from the first set position; Exemplarily, the third detection device may be arranged inside the anesthesia storage tank 1 or outside the anesthesia storage tank 1. In specific implementation, the third detection device may be connected to the anesthesia storage tank 1 through a communicating device, so that the third detection device can be connected to the anesthesia storage tank 1. The external assembly of the anesthesia storage tank 1.

14 is a schematic diagram of the fourth circuit structure related to the anesthesia vaporizer according to the embodiment of the present invention. Compared with FIG. 12, FIG. 14 adds a third detection device 106. Here, the signal receiving end of the controller 101 is connected to the third detection device 106. Signal output terminal.

In actual implementation, the above liquid level monitoring method may further include: the third detection device 106 detects the state of the anesthetic at the second set position in the anesthesia storage tank 1 and outputs second detection information; the controller 101 receives the second detection information. Further, the controller 101 can calibrate the second detection device 105 according to the first detection information and the second detection information; it can be seen that by setting the third detection device, the second detection device 105 can be Calibration, in this way, can eliminate drift (error) generated during the use of the second detection device 105, thereby improving the accuracy of liquid level detection. In addition, the calibration process does not require user intervention, which further improves the reliability of liquid level detection.

It should be noted that the display 104 is an optional device. For example, the display 104 can be removed on the basis of FIG. 14.

When the third detection device 106 is set inside the anesthesia storage tank 1, if the third detection device 106 needs to contact the anesthetic in the anesthesia storage tank 1, the third detection device 106 needs to be in contact with the anesthetic in the anesthesia storage tank 1. The material can be PPS, PPSU, POM, PTFE, stainless steel, etc. The second detection device 105 can be enclosed by a cover made of the above-mentioned materials.

In practical applications, the third detection device 106 may include one or more of an ultrasonic sensor, a differential pressure detection device, a Hall sensor, a magnetic induction sensor, a capacitance sensor, and an LVDT. The third detection device 106 can be enclosed by a cover made of the above-mentioned materials.

In the embodiment of the present invention, the third detecting device 106 can detect the single-point liquid level of the anesthetic liquid in the anesthetic storage tank. In practical applications, the realization principle of single-point liquid level monitoring using the third detection device may be: when the third detection device 106 includes a Hall sensor and/or a magnetic induction sensor, the position of the Hall sensor or the magnetic induction sensor is based on the first Second, if the set position is determined, in this way, single-point liquid level detection can be performed according to the Hall sensor or the magnetic induction sensor, so that the state of the anesthetic at the second set position in the anesthesia storage tank can be directly determined, and the second detection information is output; When the third detection device 106 includes one or more of a differential pressure detection device, a capacitance sensor, and an LVDT, one or more of the differential pressure detection device, a capacitance sensor, and an LVDT can be used to perform continuous liquid level detection, thereby determining anesthesia storage The current level of the anesthetic liquid in the tank, and then the relationship between the current level of the anesthetic liquid in the anesthetic storage tank and the second set position can be judged, and then the anesthetic at the second set position in the anesthetic storage tank can be determined State, and output the second detection information; when the third detection device 106 includes an ultrasonic sensor, the position of the ultrasonic sensor can be determined according to the second set position. In one example, single-point liquid level detection can be performed based on the ultrasonic sensor, so that the state of the anesthetic at the second set position in the anesthesia storage tank can be directly determined, and the second detection information can be output; in another example, ultrasonic waves can be used The sensor performs continuous level detection to determine the current level of the anesthetic liquid in the anesthetic storage tank. Then, it can determine the relationship between the current level of the anesthetic liquid in the anesthetic storage tank and the second set position, thereby determining the anesthesia The state of the anesthetic at the second set position in the storage tank, and the second detection information is output.

In an embodiment, when the third detection device 106 includes an ultrasonic sensor, the implementation manner of the ultrasonic sensor in the third detection device 106 is the same as the implementation manner of the ultrasonic sensor in the first detection device 102, and will not be repeated here.

In actual implementation, after the ultrasonic sensor in the third detection device 106 outputs the second detection information to the controller 101, the controller can calibrate the second detection device 105 according to the first detection information and the second detection information. .

In one embodiment, when the third detection device 106 includes a capacitance sensor, the implementation of the capacitance sensor in the third detection device 106 is the same as the implementation of the capacitance sensor in the first detection device 102, and will not be repeated here.

In actual implementation, after the capacitance sensor in the third detection device 106 outputs the second detection information to the controller 101, the controller can calibrate the second detection device 105 according to the first detection information and the second detection information. .

In one embodiment, when the third detection device 106 includes a differential pressure detection device, the implementation of the differential pressure detection device in the third detection device 106 is the same as the implementation manner of the differential pressure detection device in the first detection device 102. Go into details again.

In actual implementation, after the differential pressure detection device in the third detection device 106 outputs the second detection information to the controller 101, the controller can perform the detection on the second detection device 105 according to the first detection information and the second detection information. target.

In one embodiment, when the third detection device 106 includes a Hall sensor and/or a magnetic induction sensor, the implementation of the Hall sensor and/or the magnetic induction sensor in the third detection device 106 is the same as that of the Hall sensor in the first detection device 102. The implementation of the sensor and/or the magnetic induction sensor is the same, and will not be repeated here.

In actual implementation, after the Hall sensor and/or the magnetic induction sensor in the third detection device 106 output the second detection information to the controller 101, the controller may perform the second detection information according to the first detection information and the second detection information. The detection device 105 performs calibration.

In an embodiment, when the third detection device 106 includes an LVDT, the implementation of the LVDT in the third detection device 106 is the same as the implementation of the LVDT in the first detection device 102, which will not be repeated here.

In actual implementation, after the LVDT in the third detection device 106 outputs the second detection information to the controller 101, the controller can calibrate the second detection device 105 according to the first detection information and the second detection information.

FIG. 15 is a schematic diagram of a ninth scene for realizing liquid level detection in an embodiment of the present invention. Compared with FIG. 13, FIG. 15 adds a second ultrasonic sensor 12; referring to FIG. 15, in practical applications, it can be based on the second ultrasonic sensor 12. The signal received by the ultrasonic receiver determines the state of the anesthetic at the second set position in the anesthesia storage tank 1, and outputs the second detection information to the controller 101; the controller 101 can pair the first detection information with the second detection information The second capacitance sensor 18 is calibrated to eliminate long-term use drift of the second capacitance sensor 18 and improve the accuracy of liquid level detection of the second capacitance sensor 18.

The technical solutions described in the embodiments of the present invention can be combined arbitrarily without conflict.

In the several embodiments provided by the present invention, it should be understood that the disclosed method and smart device can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, such as: multiple units or components can be combined, or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms. of.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. Should be covered within the scope of protection of this application.

Claims

An anesthesia vaporizer, comprising an anesthesia storage tank, an anesthesia vaporization device, a controller, and a first detection device for detecting the liquid level of anesthetic medicine in the anesthesia storage tank;

An anesthesia evaporation device, connected to the anesthesia storage tank;

The first detection device is arranged on the anesthesia storage tank, and the first detection device detects the state of the anesthetic at a first set position in the anesthesia storage tank, and outputs first detection information;

The controller is connected with the first detection device, judges that there is no anesthetic in the first set position of the anesthesia storage tank according to the first detection information, and outputs alarm information.
The anesthesia vaporizer according to claim 1, wherein the first detection device includes one or more of an ultrasonic sensor, a differential pressure detection device, a Hall sensor, a magnetic induction sensor, a capacitance sensor, and a linear variable differential transformer LVDT. A.
The anesthesia vaporizer according to claim 2, wherein when the first detection device includes the ultrasonic sensor, the first detection device includes a first ultrasonic generator and a first ultrasonic receiver that are arranged opposite to each other, and the The first set position is on the propagation path of the first ultrasonic generator and the first ultrasonic receiver.
The anesthesia vaporizer according to claim 2, wherein when the first detection device includes the differential pressure detection device, the first detection device detects the pressure of the first sampling point and the second sampling point, and the first A sampling point and a second sampling point correspond to different liquid level heights, the first sampling point is not higher than the first set position, and the second sampling point is not lower than the first set position.
The anesthetic vaporizer according to claim 2, wherein when the first detection device comprises the Hall sensor and/or the magnetic induction sensor, the first detection device comprises a first detection device that can float on the liquid surface of the anesthetic liquid. A positioning element and a first sensor arranged near the first set position.
The anesthesia vaporizer according to claim 5, wherein when the first detection device includes the Hall sensor, the first sensor is a Hall induction device; the first detection device includes the magnetic induction sensor When the first sensor is a magnetic induction proximity switch.
The anesthesia vaporizer according to claim 2, wherein when the first detection device includes the capacitance sensor, the first detection device includes a capacitor located inside the anesthesia storage tank or on the surface of the anesthesia storage tank Sensor electrode.
The anesthesia vaporizer according to claim 2, wherein the first detection device comprises an LVDT located inside the anesthetic storage tank, and the LVDT of the first detection device is provided with a first float that changes with the height of the liquid. structure.
The anesthesia vaporizer according to claim 1, further comprising:

The second detection device detects and outputs level information of the anesthetic liquid in the anesthesia storage tank.
The anesthesia vaporizer according to claim 9, wherein the second detection device includes one or more of a capacitance sensor, a differential pressure detection device, an ultrasonic sensor, or an LVDT.
The anesthesia vaporizer according to claim 9, further comprising:

The third detection device detects the state of the anesthetic at the second set position in the anesthesia storage tank, and outputs second detection information; the second set position is different from the first set position.
The anesthesia vaporizer according to claim 11, wherein the controller further calibrates the second detection device based on the first detection information and the second detection information.
The anesthesia vaporizer according to claim 11 or 12, wherein the third detection device includes one or more of an ultrasonic sensor, a differential pressure detection device, a Hall sensor, a magnetic induction sensor, a capacitance sensor, and an LVDT.
A liquid level detection method applied to an anesthesia vaporizer, the anesthesia vaporizer comprising an anesthesia storage tank, an anesthesia vaporization device, a controller, and a first detection device for detecting the liquid level of anesthetic medicine in the anesthesia storage tank; anesthesia vaporization The device is connected to the anesthesia storage tank; the first detection device is arranged on the anesthesia storage tank; the controller is connected to the first detection device, and the method includes:

The first detection device detects the state of the anesthetic at the first set position in the anesthesia storage tank, and outputs first detection information;

The controller determines that there is no anesthetic in the first set position of the anesthesia storage tank according to the first detection information, and outputs an alarm message.
The method according to claim 14, wherein the first detection device includes one or more of an ultrasonic sensor, a differential pressure detection device, a Hall sensor, a magnetic induction sensor, a capacitance sensor, and a linear variable differential transformer LVDT.
The method according to claim 15, wherein when the first detection device includes the ultrasonic sensor, the first detection device includes a first ultrasonic generator and a first ultrasonic receiver that are arranged oppositely, and the first The set position is on the propagation path of the first ultrasonic generator and the first ultrasonic receiver.
The method according to claim 15, wherein when the first detection device includes the differential pressure detection device, the first detection device detects the pressure at the first sampling point and the second sampling point, and the first sampling The point and the second sampling point correspond to different liquid level heights, the first sampling point is not higher than the first set position, and the second sampling point is not lower than the first set position.
15. The method according to claim 15, wherein when the first detection device comprises the Hall sensor and/or the magnetic induction sensor, the first detection device comprises a first positioning element floating on the liquid surface of the anesthetic liquid and A first sensor set near the first set position.
The method according to claim 18, wherein when the first detection device includes the Hall sensor, the first sensor is a Hall induction device; when the first detection device includes the magnetic induction sensor, The first sensor is a magnetic induction proximity switch.
The method according to claim 15, wherein when the first detection device includes the capacitance sensor, the first detection device includes a capacitance sensor electrode located inside the anesthesia storage tank or on the surface of the anesthesia storage tank .
15. The method according to claim 15, wherein the first detection device comprises an LVDT located inside the anesthetic storage tank, and the LVDT of the first detection device is provided with a first floating structure that changes with the height of the liquid.
The method according to claim 14, wherein the anesthesia vaporizer further comprises a second detection device;

The method further includes: the second detection device detects and outputs liquid level information of the anesthetic liquid in the anesthesia storage tank.
The method according to claim 22, wherein the second detection device comprises one or more of a capacitance sensor, a differential pressure detection device, an ultrasonic sensor, or an LVDT.
The method according to claim 22, wherein the anesthesia vaporizer further comprises a third detection device;

The method further includes: the third detection device detects the state of the anesthetic at the second set position in the anesthesia storage tank, and outputs second detection information; the second set position and the first set position different.
The method according to claim 24, wherein the method further comprises: the controller further calibrating the second detection device based on the first detection information and the second detection information.
The method according to claim 24 or 25, wherein the third detection device includes one or more of an ultrasonic sensor, a differential pressure detection device, a Hall sensor, a magnetic induction sensor, a capacitance sensor, and an LVDT.