CN112683839B - Method for detecting gas chamber pollution, gas detection device and readable storage medium - Google Patents
Method for detecting gas chamber pollution, gas detection device and readable storage medium Download PDFInfo
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- CN112683839B CN112683839B CN202110289571.1A CN202110289571A CN112683839B CN 112683839 B CN112683839 B CN 112683839B CN 202110289571 A CN202110289571 A CN 202110289571A CN 112683839 B CN112683839 B CN 112683839B
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Abstract
The application relates to the technical field of medical equipment, and discloses a detection method for air chamber pollution, a gas detection device and a readable storage medium. The gas detection device comprises a gas chamber, a light source and a sensor assembly: the air chamber comprises a light inlet window and a light outlet window; the light source is arranged on one side of the light inlet window, and the light path of the light source penetrates through the light inlet window and the light outlet window; the sensor assembly is arranged on one side of the light outlet window, the sensor assembly and the air chamber can rotate relatively, and the sensor assembly collects light signals at different positions of the light outlet window so as to carry out pollution detection on the air chamber. Through the mode, the air chamber can be subjected to pollution detection, so that the accuracy of gas detection in the air chamber is further improved.
Description
Technical Field
The present application relates to the field of medical equipment technology, and in particular, to a method for detecting contamination in a gas chamber, a gas detection device, and a readable storage medium.
Background
Most of respiratory gas concentration detection in the medical field adopts external infrared spectroscopy, infrared light penetrates through an analysis gas chamber and irradiates on a sensor to analyze gas to be detected flowing in the gas chamber, and signals received by the sensor are in negative correlation with the concentration change of the gas to be detected.
The related gas detection device can work for 5-10 years at the hospital end, and the risk of foreign matters entering the analysis air chamber can be greatly increased after the related gas detection device works for a long time. Because the foreign matter is usually semitransparent irregular pollutant and adheres to the inner wall of the analysis gas chamber or the optical path lens, the condition module can not be identified only through signal characteristics, the foreign matter is usually mistaken for the analysis gas, measurement errors are caused, if the foreign matter can not be found in time, medical staff can be misled for a long time, and the treatment effect of a plurality of patients is endangered.
Disclosure of Invention
In order to solve the above problems, the present application provides a method for detecting gas chamber contamination, a gas detection apparatus, and a readable storage medium, which can detect contamination in a gas chamber, so as to further improve accuracy of detecting gas in the gas chamber.
A technical scheme that this application adopted provides a gaseous detection device, and this gaseous detection device includes: the air chamber comprises a light inlet window and a light outlet window; the light source is arranged on one side of the light inlet window, and the light path of the light source penetrates through the light inlet window and the light outlet window; the sensor assembly is arranged on one side of the light outlet window, the sensor assembly and the air chamber can rotate relatively, and the sensor assembly collects light signals at different positions of the light outlet window so as to carry out pollution detection on the air chamber.
The gas detection device also comprises a processor, wherein the processor is connected with the sensor assembly; the sensor assembly is a multi-channel sensor assembly, and each channel is used for collecting an optical signal; the processor is used for detecting the optical signals collected by each channel and determining the pollution degree of the air chamber based on the detection result.
The processor is further used for calculating the optical signals collected by each channel to obtain a correlation coefficient of the optical signals between each channel, and determining the pollution degree of the gas chamber based on the correlation coefficient.
And the processor is also used for determining that the pollution exists in the gas chamber when the correlation coefficient meets a preset range, and determining the pollution degree of the gas chamber based on the change degree of the correlation coefficient.
The processor is further configured to compare the optical signal collected by each channel with a preset optical signal corresponding to each channel to obtain a ratio data set corresponding to each channel; and comparing the ratio data sets corresponding to each channel, and determining the pollution degree of the air chamber based on the comparison result.
The processor is further used for arranging the ratio data sets corresponding to the channels according to the sequence of the optical signals collected by the channels; normalizing each arranged ratio data set; respectively establishing a oscillogram according to each ratio data set; each waveform is compared to determine the degree of contamination of the gas cell.
The processor is further used for comparing each oscillogram with a corresponding standard oscillogram and determining an abnormal area in each oscillogram; and determining the pollution degree of the air chamber according to the number and the area of the abnormal areas.
Another technical scheme that this application adopted provides a detection method of air chamber pollution, is applied to gaseous detection device, and this gaseous detection device includes: the air chamber comprises a light inlet window and a light outlet window; the light source is arranged on one side of the light inlet window, and the light path of the light source penetrates through the light inlet window and the light outlet window; the sensor assembly is arranged on one side of the light outlet window, and the sensor assembly and the air chamber can rotate relatively, and the method comprises the following steps: controlling the sensor component or the air chamber to rotate relatively so as to enable the sensor component to collect light signals at different positions of the light outlet window; and carrying out pollution detection on the air chamber based on the optical signal.
The sensor assembly is a multi-channel sensor assembly, and each channel is used for collecting an optical signal; detecting contamination of the gas cell based on the optical signal comprises: and detecting the optical signal collected by each channel, and determining the pollution degree of the air chamber based on the detection result.
Wherein, detect the light signal of every passageway collection to confirm the pollution degree of air chamber based on the testing result, include: and calculating the optical signals collected by each channel to obtain the correlation coefficient of the optical signals between each channel, determining that the interior of the air chamber is polluted when the correlation coefficient meets a preset range, and determining the pollution degree of the air chamber based on the change degree of the correlation coefficient.
Wherein, detect the light signal of every passageway collection to confirm the pollution degree of air chamber based on the testing result, include: comparing the optical signal collected by each channel with a preset optical signal corresponding to each channel to obtain a ratio data set corresponding to each channel; and comparing the ratio data sets corresponding to each channel, and determining the pollution degree of the air chamber based on the comparison result.
Wherein, compare between the ratio data set that each passageway corresponds to and confirm the pollution degree of air chamber based on the comparison result, include: arranging the ratio data sets corresponding to each channel according to the sequence of the optical signals collected by each channel; respectively carrying out normalization processing on each arrayed ratio data set; respectively establishing a oscillogram according to each ratio data set; each waveform is compared to determine the degree of contamination of the gas cell.
Another technical solution adopted by the present application is to provide a computer-readable storage medium for storing program data, which when executed by a processor, is used for implementing the method provided in the above technical solution.
The beneficial effect of this application is: be different from prior art's condition, but this application passes through the mode of relative rotation between sensor module and the air chamber, make sensor module can collect light signal corresponding the different positions of light-emitting window, in order to pollute the air chamber and detect, and then can effectual suggestion medical personnel in time change gaseous detection device, and through polluting the air chamber and detect, can get rid of the air chamber that pollutes in advance, further improve the accuracy of gas detection in the air chamber, reduce the gas detection anomaly because of not discerning the air chamber pollution and cause, and then reduce the unusual patient personal safety problem that arouses of gas detection.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of a gas detection apparatus provided herein;
FIG. 2 is a schematic structural view of an embodiment of a plenum provided herein;
FIG. 3 is a schematic view of a movement path of a sensor assembly provided herein;
FIG. 4 is a schematic view of another movement trace of the sensor assembly provided herein;
FIG. 5 is a schematic structural diagram of a second embodiment of a gas detection apparatus provided herein;
FIG. 6 is a schematic structural diagram of one embodiment of a sensor assembly provided herein;
FIGS. 7 and 8 are schematic diagrams of rotation of a sensor assembly provided herein;
FIG. 9 is a schematic diagram of a waveform of a light signal collected by a sensor assembly provided herein;
FIG. 10 is a schematic diagram of another waveform for collecting a light signal by a sensor assembly provided herein;
FIG. 11 is a schematic structural view of a third embodiment of a gas detection apparatus provided herein;
FIG. 12 is a schematic structural view of another embodiment of a plenum and sensor assembly provided herein;
FIGS. 13 and 14 are schematic diagrams of the rotation of the air chamber provided by the present application;
FIG. 15 is a schematic flow chart diagram illustrating an embodiment of a method for detecting contamination in a gas cell provided herein;
FIG. 16 is a schematic structural diagram of an embodiment of a computer-readable storage medium provided in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of a gas detection device provided in the present application. The gas detection device 10 includes a gas cell 11, a light source 12, and a sensor assembly 13.
The gas cell 11 includes a gas cell body 111, a light inlet window 112, and a light outlet window 113. The light inlet window 112 is disposed at one end of the chamber body 111, and the light outlet window 113 is disposed at the other end of the chamber body 111. In an application scenario, referring to fig. 2, the chamber body 111 is in a cylindrical shape, and the light inlet window 112 and the light outlet window 113 are disposed on the top surface and the bottom surface of the chamber body 111. The plenum body 111 is provided with an air inlet 114 and an air outlet 115. When gas detection is performed, gas to be detected enters the gas cell body 111 from the gas inlet and exits the gas cell body 111 from the gas outlet 115. In other embodiments, the chamber body 111 may be a rectangular parallelepiped, and the light inlet window 112 and the light outlet window 113 are disposed on two opposite surfaces of the chamber body 111.
The light source 12 is disposed at one side of the light entrance window 112, and the light path of the light source 12 passes through the light entrance window 112 and the light exit window 113. The sensor assembly 13 is disposed on one side of the light-emitting window 113, the sensor assembly 13 and the air chamber can rotate relatively, and the sensor assembly 13 can collect light signals at different positions of the light-emitting window 113 to perform pollution detection on the air chamber 11.
In some embodiments, the light source 12 may emit an infrared light signal and the sensor assembly 13 may correspond to an infrared sensor. It will be appreciated that the light source 12 may also emit other types of light signals, such as yellow light, violet light, etc., and the sensor assembly 13 may be a sensor for different types of light.
In one application scenario, the sensor assembly 13 includes a movable sensor detection channel A. Referring to fig. 3, the movable sensor detection channel a can move around the dashed trace in fig. 3 at one side of the light exit window 113 to collect the light signal.
In another application scenario, referring to fig. 4, the movable sensor detection channel a can move around the dashed trace in fig. 4 at one side of the light exit window 113 to collect the light signal.
Through the above manner, the sensor assembly 13 can acquire the optical signals corresponding to different positions of the light-emitting window 113, and can detect whether the air outlet chamber 11 is polluted or not according to the optical signals at different positions. Specifically, due to the positions of the gas inlet 114 and the gas outlet 115 of the gas chamber 11, the flow path of the gas to be detected in the gas chamber 11 is regular, and therefore, the pollution of the gas to be detected to the gas chamber 11 is relatively concentrated on the whole flow path, and the pollution is caused to the light outlet window 113 or the light inlet window 112.
In another application scenario, the sensor assembly 13 may be rotated relative to the gas cell 11. For example, the gas chamber 11 is fixed, the light source 12 is turned on, the emitted light beam enters along the light entrance window 112, passes through the gas chamber main body 111, and exits through the light exit window 113, and the sensor assembly 13 collects the light beam exiting from the light exit window 113 during rotation. Since the sensor assembly 13 collects light signals during rotation, a corresponding light signal is collected at each rotational position. If the light inlet window 112 and/or the light outlet window 113 are not contaminated, the optical signal corresponding to each rotation position acquired by the sensor assembly 13 is not less than the optical signal threshold; if at least a portion of the light entrance window 112 and/or the light exit window 113 is contaminated, and the light signal collected by the sensor assembly 13 corresponding to the contaminated portion is smaller than the light signal threshold, it may be determined that at least a portion of the light entrance window 112 and/or the light exit window 113 is contaminated. Due to the determination of the rotation path of the sensor assembly 13, the contamination area in the entrance window 112 and/or the exit window 113 can be specifically determined according to the rotation path.
In another application scenario, the sensor assembly 13 may be rotated relative to the gas cell 11. For example, the sensor assembly 13 is fixed, the air chamber 11 rotates, when the light source 12 is turned on, the emitted light beam enters along the light entrance window 112, passes through the air chamber body 111, and exits through the light exit window 113, and the sensor assembly 13 collects the light beam exiting from the light exit window 113 when the air chamber 11 rotates. Since the sensor assembly 13 collects the light signal emitted when the air chamber 11 rotates, each rotation position of the air chamber 11 will make the sensor assembly 13 collect the corresponding light signal. If the light inlet window 112 and/or the light outlet window 113 are not contaminated, the optical signal corresponding to each rotation position acquired by the sensor assembly 13 is not less than the optical signal threshold; if at least a portion of the light entrance window 112 and/or the light exit window 113 is contaminated, and the light signal collected by the sensor assembly 13 corresponding to the contaminated portion is smaller than the light signal threshold, it may be determined that at least a portion of the light entrance window 112 and/or the light exit window 113 is contaminated. Due to the rotation path determination of the gas cell 11, the contamination area in the entrance window 112 and/or the exit window 113 may be specifically determined according to the rotation path. Wherein the gas cell 11 and the light source 12 may be integrally provided.
After detecting that the air chamber 11 is polluted, a prompt can be given to enable the user to clean the air chamber 11.
In some embodiments, according to the pollution detection result, the pollution alarm information of the air chamber 11 is triggered; the alarm information is sent to medical equipment of an upper computer, interface alarm information is displayed, and prompt functions such as an alarm indicator lamp and sound of the upper computer are triggered.
In this embodiment, but through the mode of relative rotation between sensor module 13 and the air chamber 11, make sensor module 13 can collect light signal corresponding to 113 different positions of light-emitting window, in order to pollute the detection to air chamber 11, and then can effectual suggestion medical personnel in time change gaseous detection device, and through polluting the air chamber and detect, can get rid of the air chamber 11 that pollutes in advance, further improve the accuracy to gaseous detection in the air chamber 11, reduce the gaseous detection anomaly that causes because of not discerning the air chamber pollution, and then reduce the unusual patient personal safety problem that arouses of gaseous detection.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a second embodiment of the gas detection apparatus provided in the present application. The gas detection device 50 includes a gas cell 51, a light source 52, a sensor assembly 53, and a processor 54. The processor 54 is connected to the sensor assembly 53, and the processor 54 is used for detecting the optical signals collected by the sensor assembly 53 and determining the degree of contamination of the gas chamber based on the detection result.
The air chamber 51 includes an air chamber body 511, a light inlet window 512, and a light outlet window 513. The light-in window 512 is disposed at one end of the chamber body 511, and the light-out window 513 is disposed at the other end of the chamber body 511.
In some embodiments, the processor 54 is coupled to the light source 52 for controlling the turning on and off of the light source 52.
In some embodiments, sensor assembly 53 is a single channel sensor. The processor 54, upon receiving the light signal collected by the sensor assembly 53, compares the light signal with a light signal threshold, and if the light signal threshold is lower, it indicates that the gas cell 51 is contaminated. In an application scenario, the contamination level may also be determined from the difference between the optical signal and the optical signal threshold. Such as setting the degree of contamination to mild, moderate and severe. After the contamination level is determined, the contamination level is reported to remind the user to clean the air chamber 51. The user can decide whether to immediately clean the air cell 51 according to the degree of contamination.
In some embodiments, the gas cell 51 is detachably connected to the light source 52 and the sensor assembly 53, so that the gas cell 51 can be directly replaced to ensure subsequent detection of the gas to be detected.
In some embodiments, the sensor assembly 53 is a multi-channel sensor assembly, each channel being used for collecting an optical signal; the processor 54 is used for detecting the optical signals collected by each channel and determining the degree of contamination of the gas cell 51 based on the detection result. It will be appreciated that the light signals collected by different channels of the sensor assembly 53 correspond to different positions of the light exit window 513.
Specifically, the processor 54 is further configured to calculate the optical signal collected by each channel to obtain a correlation coefficient of the optical signal between each channel, and determine the degree of contamination of the gas cell 51 based on the degree of change of the correlation coefficient.
In an application scenario, a preset range of the correlation coefficient may be set, and the processor 54 is further configured to determine that contamination exists inside the gas cell 51 when the correlation coefficient satisfies the preset range, and determine the contamination level of the gas cell 51 based on the variation level of the correlation coefficient. For example, the sensor assembly 13 is a two-channel sensor assembly, with a normal range of correlation coefficients of-1, -0.7. When the air chamber 51 is polluted, the correlation coefficient of the two channels changes, and the correlation coefficient changes to be [ -0.5, 0], and the pollution degree of the polluted area can be generally evaluated according to the change degree of the correlation coefficient.
In some embodiments, the processor 54 is further configured to compare the light signal collected by each channel with a preset light signal corresponding to each channel to obtain a ratio data set corresponding to each channel; the ratio data sets corresponding to each channel are compared with each other, and the degree of contamination of the gas cell 51 is determined based on the comparison result. When the air chamber 51 is free of contamination, the sensor element 53 collects light signals corresponding to different positions of the light-emitting window 513, and uses the light signals as preset light signals. The preset optical signal corresponding to the gas cell 51 may be stored in the gas detection device at the time of shipment of the gas detection device 50.
In an application scenario, the processor 54 is further configured to arrange the ratio data sets corresponding to each channel in an order of the optical signals collected by each channel of the sensor assembly 53; respectively carrying out normalization processing on each arrayed ratio data set; respectively establishing a oscillogram according to each ratio data set; each waveform map is compared to determine the degree of contamination of the gas cell 51.
When the sensor assembly 53 rotates, each rotating position collects an optical signal, and the corresponding optical signals are sorted according to the sequence of the rotating positions, for example, to form a data set or an array.
After sorting, the maximum value in the ratio data set is selected, and normalization processing is performed using the maximum value as a reference. And then, a waveform diagram is established by using the data set obtained by normalization. The degree of contamination of the gas cell 51 is determined from the waveform diagram.
Specifically, the processor 54 is further configured to compare each waveform map with its corresponding standard waveform map, and determine an abnormal region in each waveform map; the degree of contamination of the air cell 51 is determined according to the number and area of the abnormal areas.
In some embodiments, the gas detection device 50 further comprises a terminal device (not shown) disposed in the light exit window 513, wherein the processor 54 and the sensor assembly 53 are disposed in the terminal device. When the terminal device is controlled to rotate, the sensor component 53 can rotate corresponding to different positions of the light-emitting window 513 of the air chamber 51, and is used for collecting optical signals to perform pollution detection on the air chamber 51.
In an application scenario, taking the sensor assembly 53 as a dual-channel sensor assembly as an example, the gas detection apparatus will be described:
referring to fig. 6, the sensor element 53 is circular on a side facing the light exit window 513, and the first channel B and the second channel C of the sensor element 53 are symmetrically arranged based on the center O. The sensor assembly 53 is disposed coaxially with the air chamber 51. The sensor assembly 53 is rotatable about an axis to collect optical signals during rotation.
Referring to fig. 7 and 8, if the sensor assembly 53 is rotated counterclockwise by 180 degrees around the axis in fig. 7, the state shown in fig. 8 is obtained. The first channel B collects the optical signal to the left of the gas cell 51 during rotation and the second channel C collects the optical signal to the right of the gas cell 51 during rotation. The sensor assembly 53 shown in fig. 8 is rotated counterclockwise by 180 degrees around the axis, and then the first channel B and the second channel C collect the optical signals within the preset range of the light-emitting window 513 during the rotation process.
In general, the contamination determination of the gas cell 51 will select either a non-operating period or a zero calibration state, in which case the gas cell 51 is free of the gas to be detected. As the first channel B and the second channel C pass through the contaminated region, the amplitude of the collected optical signal decreases while the phase is shifted by 180 °, as shown in fig. 9. In the rotation process, when the second channel C is located near the rotation angle a, the amplitude of the optical signal decreases, which indicates that there is contamination in the light entrance window 512 or the light exit window 513 of the gas cell 51 corresponding to the rotation angle a. A drop in the amplitude of the optical signal also occurs when the first channel B is at a rotation angle around a +180 degrees.
When the optical signal amplitude exceeds a threshold value, it is determined that contamination exists within the gas cell 51.
It will be appreciated that, because of variations in the assembly process of the components, the actual first and second channels B, C are not strictly concentrically disposed and are generally offset from the center, and the correlation coefficients of the first and second channels B, C are inversely related during rotation of the sensor assembly 53. Referring to fig. 10, the normal range of correlation coefficients is [ -1, -0.7 ]. When the air chamber 51 is polluted, the correlation coefficient of the two channels changes to be [ -0.5, 0], and the severity of the polluted area can be totally evaluated according to the change degree of the correlation coefficient.
The optical signal detection is carried out through double channels, the authenticity of the optical signals collected mutually can be verified, and the authenticity of pollution verification can be improved.
In other application scenes, the first channel B, the second channel C and the rotated preset optical signals corresponding to the first channel B and the second channel C stored before leaving the factory are respectively subjected to ratio values to obtain new two-channel numerical groups, the respective maximum values of the numerical values of the two channels are found out to be used as normalization references, array normalization is carried out, head and tail data of the normalized numerical groups are linked into an annular numerical group, the array cyclic phase shift of any one of the channels is selected to be 180 degrees, and phase alignment of the normalized data of the two channels is realized. The number of polluted areas and the pollution degree can be determined according to the number and the area of the two-channel waveform synchronous recesses.
Triggering pollution alarm information of the air chamber 51 after detecting that the air chamber 51 is polluted; the alarm information is sent to medical equipment of an upper computer, interface alarm information is displayed, and prompt functions of an alarm indicator lamp, sound and the like of the upper computer are triggered, wherein the upper computer can be a monitor, a breathing machine, an anesthesia machine and the like.
Carry out pollution detection to the air chamber through above-mentioned mode, and then can effectual suggestion medical personnel in time change gaseous detection device to through polluting the air chamber and detecting, can get rid of the air chamber that pollutes in advance, further improve the accuracy of gas detection in the air chamber, reduce because of not discerning the gas chamber and pollute the gas detection that causes unusually, and then reduce the unusual patient's personal safety problem that arouses of gas detection.
Referring to fig. 11, fig. 11 is a schematic structural diagram of a gas detection apparatus according to a third embodiment of the present application. The gas detection device 200 includes a light source 201 and a sensor assembly 202. The gas detection device 200 is detachably connected to the gas chamber 100 to be detected, and is used for detecting gas in the gas chamber 100 to be detected. The gas cell 100 to be detected comprises a gas cell body 101, a light entrance window 102 and a light exit window 103.
The light source 201 is detachably disposed on the light entrance window 102, and a light path of the light source 201 passes through the light entrance window 102 and the light exit window 103. The sensor assembly 202 is detachably arranged on the light-emitting window 103, the sensor assembly 202 and the gas chamber 100 to be detected can rotate relatively, and the sensor assembly 202 can collect light signals at different positions of the light-emitting window 103 so as to perform pollution detection on the gas chamber 100 to be detected.
In other embodiments, the gas detecting apparatus 200 of the present embodiment further includes a processor (not shown), the processor is connected to the light source 201 and the sensor assembly 202, and the processor can detect the contamination of the gas chamber 100 to be detected according to the light signal collected by the sensor assembly 202.
Since the processor in this embodiment is similar to the processor in any of the embodiments described above, the same or similar technical solutions can be implemented, and specific reference is made to the above embodiments, which is not described herein again.
In other embodiments, referring to fig. 12, the sensor assembly 202 includes at least a first sensor 2021 and a second sensor 2022. The first sensor 2021 and the second sensor 2022 are respectively connected to the processor for collecting the light signals emitted from the light-emitting window 103. The first sensor 2021 and the second sensor 2022 are symmetrically distributed based on the center O.
The sensor assembly 202 may be the sensor assembly as in any of the above embodiments, and the sensor assembly 202 and the gas chamber 100 to be detected may rotate relatively to collect light signals corresponding to different positions of the light-emitting window 103, so as to perform contamination detection on the gas chamber 100 to be detected.
In some embodiments, referring to fig. 13 and 14, rotating the air cell 100 in fig. 13 by 180 degrees counterclockwise about the axis results in the state shown in fig. 14. During the rotation, the first sensor 2021 collects an optical signal corresponding to the contaminant D contained in the gas cell 100. The gas cell 100 shown in fig. 14 is rotated counterclockwise by 180 degrees around the axis again, and then the second sensor 2022 collects the optical signal corresponding to the contaminant D contained in the gas cell 100. After the gas cell 100 rotates 360 degrees, the first sensor 2021 and the second sensor 2022 each collect an optical signal corresponding to the gas cell 100.
It is to be understood that the contaminant D is shown in fig. 13 and 14 for easy understanding, and in the actual detection, the position of the contaminant D is not limited to the position, and there is also a case where there is no contaminant in the gas cell 100.
The processor can complete the technical scheme in the above embodiments according to the optical signals collected by the first sensor 2021 and the second sensor 2022, and perform contamination detection on the gas chamber 100 to be detected.
In some embodiments, a rotation unit is disposed between the gas cell 100 and the sensor assembly 202, and the rotation unit can be driven by a motor to drive a gear to rotate the gas cell 100 or the sensor assembly 202.
In some embodiments, the gas cell 100 or the sensor assembly 202 may also be powered by an external magnetic field in a manner that the gas cell 100 or the sensor assembly 202 is configured as a rotor to rotate the gas cell 100 or the sensor assembly 202.
Referring to fig. 15, fig. 15 is a schematic flow chart of an embodiment of a method for detecting contamination in a gas chamber according to the present disclosure. The method comprises the following steps:
step 301: and controlling the sensor assembly or the air chamber to rotate relatively so that the sensor assembly collects light signals at different positions of the light outlet window.
The gas detection device in this embodiment may be the gas detection device in any of the embodiments described above.
Step 301 is performed when there is no gas to be detected in the gas chamber. Specifically, step 301 may be performed by monitoring the signal for a period of time after the device is powered on. Or after the gas detection is finished, judging whether the gas to be detected in the gas chamber is cleared or not, if no residual gas to be detected exists in the gas chamber, executing the step 301, otherwise, starting the getter pump to exhaust the residual gas in the gas chamber, and executing the step 301 after the optical signal detected by the sensor assembly is stable.
Wherein, the light inlet window of the air chamber is provided with a light source, and the light path of the light source passes through the light inlet window and the light outlet window.
Step 302: and carrying out pollution detection on the air chamber based on the optical signal.
In some embodiments, the optical signal collected by the sensor assembly is detected, and the degree of contamination of the gas cell is determined based on the detection result.
The sensor assembly is a multi-channel sensor assembly, and each channel respectively collects an optical signal; step 302 may be to detect the optical signal collected by each channel and determine the degree of contamination of the gas cell based on the detection result.
In an application scene, the optical signals collected by each channel are calculated to obtain the correlation coefficient of the optical signals between each channel, and the pollution degree of the air chamber is determined based on the correlation coefficient. Specifically, when the correlation coefficient satisfies a preset range, it is determined that contamination exists inside the gas chamber, and the degree of contamination of the gas chamber is determined based on the degree of change in the correlation coefficient.
In another application scene, comparing the optical signal collected by each channel with a preset optical signal corresponding to each channel to obtain a ratio data set corresponding to each channel; and comparing the ratio data sets corresponding to each channel, and determining the pollution degree of the air chamber based on the comparison result.
Specifically, the ratio data sets corresponding to each channel are arranged according to the sequence of the optical signals collected by each channel; normalizing each arranged ratio data set; respectively establishing a oscillogram according to each ratio data set; each waveform is compared to determine the degree of contamination of the gas cell. Comparing each oscillogram with a corresponding standard oscillogram, and determining an abnormal area in each oscillogram; and determining the pollution degree of the air chamber according to the number and the area of the abnormal areas.
Step 302 may perform contamination detection on the gas cell based on the optical signal in the manner described in any of the embodiments above.
Triggering air chamber pollution alarm information according to a pollution detection result; the alarm information is sent to medical equipment of an upper computer, interface alarm information is displayed, and prompt functions such as an alarm indicator lamp and sound of the upper computer are triggered. So that the air cells can be replaced or cleaned by the relevant personnel.
After the gas chamber is replaced or cleaned, gas detection is performed.
The principle of gas detection is described below:
according to the lambert-beer law, the relationship between the gas concentration and the infrared light signal of the measurement channel is as follows:
wherein the content of the first and second substances,Iin order to be able to transmit the light intensity,I 0as to the intensity of the incident light,Jin order to measure the concentration of the gas,
is the absorption factor. The absorption factor of a common gas measuring device is absorbed before leaving factory
And (6) carrying out calibration. Absorption factor when the gas cell is contaminated
The change can occur, which causes the above-mentioned relation equation of original concentration and light intensity to fail, and the measurement of gas concentration is wrong.
The single channel system generally cannot meet the use requirements in a complex scene, and in addition, the problems of long-term drift and the like of the system exist, so that a reference channel is usually added to the medical gas measurement module to form a two-channel scheme of the reference channel and the measurement channel for compensation and correction. The calculation formula is as follows:
wherein the content of the first and second substances,I gas in order to measure the intensity of the channel transmitted light,I gas_0 in order to measure the intensity of the incident light on the channel,I ref for reference to the intensity of the transmitted light of the channel,I ref_0 is prepared from radix GinsengIn view of the intensity of the light incident on the channel,Jin order to measure the concentration of the gas,
is the absorption factor. Because the flow path of the gas in the gas chamber is fixed, the pollution is not uniformly distributed on the inner wall of the gas chamber or the light inlet window and the light outlet window, but the pollution of a local area is heavy, and the pollution of other areas can not occur. However, it is not limited toI gas_0 AndI ref_0 the initial value obtained at the time of boot is usually difficult to capture the change of the contaminant during a single boot measurement, resulting inI gas_0 、I ref_0 、I gas AndI ref all deviate from the exact value, and in addition the absorption factor
Changes occur, so increasing the reference channel still fails to solve the problem of gas concentration measurement errors.
Because the distribution of the pollutants has a certain rule, the pollutants are concentrated in a local area, such as a light inlet window and/or a light outlet window, so that the pollution position and the pollution degree can be positioned by utilizing the rotation of the air chamber or the rotation of the sensor assembly. Specifically, the method or the gas detection device of any one of the above embodiments provided in the present application is used for detecting the pollution of the gas chamber.
But this embodiment passes through the mode of relative rotation between sensor module and the air chamber, make sensor module can collect light signal corresponding the different positions of light-emitting window, in order to pollute the air chamber and detect, and then can effectual suggestion medical personnel in time change gaseous detection device, and through polluting the air chamber and detect, can get rid of the air chamber that pollutes in advance, further improve the accuracy to the interior gas detection of air chamber, reduce because of not discerning the gas detection that the air chamber pollutes and cause unusually, and then reduce the unusual patient personal safety problem that arouses of gaseous detection.
Referring to fig. 16, fig. 16 is a schematic structural diagram of an embodiment of a computer-readable storage medium 400 provided in the present application, where the computer-readable storage medium 400 is used for storing program data 401, and when the program data 401 is executed by a processor, the program data is used for implementing the following method steps:
controlling the sensor assembly or the air chamber to rotate relatively so as to collect light signals corresponding to different positions of the light outlet window; and carrying out pollution detection on the air chamber based on the optical signal.
It is understood that the computer-readable storage medium 400 in this embodiment is applied to the gas detection apparatus in any of the above embodiments, and specific implementation thereof may refer to the above embodiments, which are not described herein again.
The gas detection device of any of the above embodiments of the present application can be installed inside medical equipment such as a monitor, a breathing machine, an anesthesia machine, etc., or can be detachably installed on the side wall of the medical equipment as an external module, and communicates with an upper computer of the medical equipment, so as to realize medical gas analysis. The gas analysis module can also have other functions besides the function of identifying the gas chamber pollution according to the specific application of the gas analysis module, for example, the gas detection device has a display function, and can display the result of identifying the gas chamber pollution and the alarm information corresponding to the result.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated units in the other embodiments described above may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (6)
1. A gas detection device, applied to medical equipment, comprising:
the air chamber comprises a light inlet window and a light outlet window;
the light source is arranged on one side of the light inlet window, and a light path of the light source penetrates through the light inlet window and the light outlet window;
the sensor assembly is arranged on one side of the light outlet window, the sensor assembly and the air chamber can rotate relatively, the sensor assembly is a dual-channel sensor assembly, and each channel respectively collects light signals at different positions of the light outlet window in the rotating process of the sensor assembly or the air chamber;
the processor is connected with the sensor assembly and used for comparing the optical signal acquired by each channel with a preset optical signal corresponding to each channel to obtain a ratio data set corresponding to each channel; and comparing the ratio data sets corresponding to each channel, and determining the pollution degree of the air chamber based on a comparison result, wherein the preset optical signal is acquired corresponding to different positions of the light-emitting window when the sensor assembly is in the air chamber without pollution.
2. The gas detection apparatus according to claim 1,
the processor is further configured to arrange the ratio data sets corresponding to each channel in an order of the optical signals collected by each channel; respectively carrying out normalization processing on each arrayed ratio data set; respectively establishing a oscillogram according to each ratio data set; comparing each of the waveforms to determine a degree of contamination of the gas cell.
3. The gas detection apparatus according to claim 2,
the processor is also used for comparing each oscillogram with a corresponding standard oscillogram and determining an abnormal area in each oscillogram; and determining the pollution degree of the air chamber according to the number and the area of the abnormal areas.
4. A method for detecting contamination of a gas cell, the method being applied to a gas detection apparatus applied to a medical device, the gas detection apparatus comprising:
the air chamber comprises a light inlet window and a light outlet window; the light source is arranged on one side of the light inlet window, and a light path of the light source penetrates through the light inlet window and the light outlet window; the sensor assembly is arranged on one side of the light outlet window, the sensor assembly and the air chamber can rotate relatively, the sensor assembly is a dual-channel sensor assembly, and the method comprises the following steps:
controlling the sensor assembly or the air chamber to rotate relatively so that each channel collects light signals at different positions of the light outlet window in the rotating process of the sensor assembly or the air chamber;
comparing the optical signal acquired by each channel with a preset optical signal corresponding to each channel to obtain a ratio data set corresponding to each channel, wherein the preset optical signal is acquired by the sensor assembly at different positions corresponding to the light-emitting window when the air chamber is pollution-free;
and comparing the ratio data sets corresponding to each channel, and determining the pollution degree of the gas chamber based on the comparison result.
5. The method of claim 4,
the comparing the ratio data sets corresponding to each channel and determining the pollution degree of the gas chamber based on the comparison result comprises:
arranging the ratio data sets corresponding to each channel according to the sequence of the optical signals collected by each channel;
respectively carrying out normalization processing on each arrayed ratio data set;
respectively establishing a oscillogram according to each ratio data set;
comparing each of the waveforms to determine a degree of contamination of the gas cell.
6. A computer-readable storage medium, characterized in that the computer-readable storage medium is used for storing program data, which, when being executed by a processor, is used for carrying out the method according to any one of claims 4-5.
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