CN111929428A - Multifunctional alcohol detector and alcohol detection method - Google Patents
Multifunctional alcohol detector and alcohol detection method Download PDFInfo
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Abstract
The invention provides a multifunctional alcohol detector and an alcohol detection method. The multifunctional alcohol detector comprises a gas sampling joint, a rapid investigation detection sensor, an active expiration detection sensor, a rapid investigation detection air pump, an active expiration detection air pump, a control module and a display module, wherein the gas sampling joint is used for being connected with a blowing nozzle; the gas sampling joint is respectively communicated with a quick investigation detection sensor and an active expiration detection sensor, and the quick investigation detection sensor and the active expiration detection sensor are respectively communicated with a quick investigation detection air pump and an active expiration detection air pump; the rapid investigation detection sensor, the active expiration detection sensor, the rapid investigation detection air pump, the active expiration detection air pump and the display module are respectively electrically connected with the control module; multifunctional alcohol detector can carry out the investigation fast and detect when initiative expiration detects, through comparing the result that initiative expiration detected and the investigation of fast detected, can get rid of and detect unusually, promotes and detects rate of accuracy and detection efficiency.
Description
Technical Field
The invention relates to the technical field of alcohol detection, in particular to a multifunctional alcohol detector and an alcohol detection method.
Background
Two types of alcohol detectors can be used by traffic police during driving with wine at the rounds, which are respectively as follows: the alcohol detector and the breath alcohol detector are rapidly checked, wherein the rapid checking and detecting function can be used for preliminarily screening the drunk driving suspicion and can not be directly used as the basis for punishing drunk driving, and active breath detection is required to be carried out through the breath alcohol detector if punishing is required. The traffic police generally uses the fast investigation alcohol appearance to carry out preliminary screening earlier when the wine drives in the ward, and reuse expiration alcohol detector carries out initiative expiration and detects when discovering that there is the suspected wine and driving, so both can raise the efficiency and guarantee the justice of law enforcement again.
Traffic polices often encounter "abnormal" alcohol detection results when performing breath alcohol detection active breath tests. In general, abnormal alcohol tests fall into two categories, one is the presence of significant alcohol in the breath, but the test results are either no alcohol or very low, called false negatives. For example, in a certain case, the driver quickly inspects that the detection result is positive, even the traffic police smells obvious alcohol smell, but the expiration detection result is zero, and only blood drawing needs to be carried out, and the detection result is that the alcohol content in the blood is 90mg/100ml, which is false negative. The other type is that the breath has no alcohol content but the test result has high alcohol concentration, which is called false positive. For example, in a case where the driver does not drink alcohol but the breath test result is 150mg/100ml, the driver is taken to perform a blood drawing test according to the specification, but the blood drawing test result is zero, which is a false positive. The occurrence of both false positives and false negatives indicates a significant abnormality in the breath alcohol results. The abnormal alcohol detection result can cause disputes of police and people, increase the workload of traffic police and delay the time of drivers, so that the problem is a technical problem which needs to be solved urgently in the drunk driving investigation and treatment process.
Similar products have been tried in the prior art to solve such problems. Chinese patent No. 201510085606.4 discloses an alcohol breath tester and a measuring method thereof, which display the measuring process, wherein the alcohol breath tester adopts two alcohol sensors and two air pumps, one of which can be a reciprocating air pump (i.e. a piston type air pump), and the other is an air pump for continuously pumping air. Therefore, whether oral alcohol exists is identified and judged by at least two sampling analysis measurements in the process of one active expiration measurement, so that misdetection is avoided. However, oral alcohol is only a part of factors causing the detection result to be abnormal (false positive), and other factors can cause the detection result to be abnormal, such as the above-mentioned false negative problem of active breath detection, which cannot be solved in the technical scheme disclosed in the patent.
Further, chinese patent with application number 201120152280.X discloses a multi-functional alcohol detector, this multi-functional alcohol detector has quick investigation function and has the alcohol detector of expiration test function again concurrently, disclose two kinds of implementation schemes in this patent, wherein, first as shown in this patent figure 3, the air inlet 1017 of quick investigation function is located the blow gun outside and hugs closely the blow gun root, if do not remove the blow gun and carry out quick investigation and detect, then because there is the existence of blow gun, air inlet 1017 is difficult to be close to the people's nose that is surveyed, hardly take out the gas that the people that is surveyed exhaled, detection effect is not good. Secondly, as shown in the attached figure 7 of the patent, the fast investigation air inlet 207 is located the inside depths of the mouthpiece pipeline, if not remove the mouthpiece, then hardly extract the outside gas of instrument, the detection effect is worse, even remove the mouthpiece, because the air inlet hides in the pipeline depths, it is the gas in the pipeline to extract at first when bleeding, can extract the gas of being surveyed people's exhalation after waiting for a few seconds, and whole process of bleeding generally does not exceed 5 seconds, the detection effect is also not good, therefore, in this patent, fast investigation detects and can not detect simultaneously with the initiative expiration detection, two functions can only select one to use.
Disclosure of Invention
The invention aims to provide a multifunctional alcohol detector which can reduce detection abnormity and improve detection efficiency.
The invention also aims to provide an alcohol detection method which can reduce detection abnormity and improve detection efficiency.
In order to achieve the purpose, the invention provides a multifunctional alcohol detector which comprises a gas sampling joint, a quick investigation detection sensor, an active expiration detection sensor, a quick investigation detection air pump, an active expiration detection air pump and a control module, wherein the gas sampling joint is used for being connected with a blowing nozzle;
the gas sampling joint is respectively communicated with the rapid investigation detection sensor and the active expiration detection sensor, and the rapid investigation detection sensor and the active expiration detection sensor are respectively communicated with the rapid investigation detection air pump and the active expiration detection air pump; the rapid investigation detection sensor, the active expiration detection sensor, the rapid investigation detection air pump and the active expiration detection air pump are respectively electrically connected with the control module;
when carrying out initiative expiration detection, quick investigation detection air pump is followed during gas sampling joint extraction gas that awaits measuring arrives quick investigation detection sensor, quick investigation detection sensor is right gas that awaits measuring carries out alcohol detection, obtains investigation data of detection and transmits for control module, control module basis investigation data of detection reachs investigation testing result, simultaneously, initiative expiration detection air pump is followed gas sampling joint department extraction gas that awaits measuring arrives in the initiative expiration detection sensor, initiative expiration detection sensor is right gas that awaits measuring carries out alcohol detection, obtains initiative expiration data of detection and transmits control module for, control module basis initiative expiration data of detection obtains expiration testing result.
The multifunctional alcohol detector comprises a display module electrically connected with the control module.
When the active expiration detection is carried out, the control module also controls the display module to display the investigation detection data and the expiration detection result.
When active expiration detection is carried out, the control module further compares the expiration detection result with a troubleshooting detection result, controls the display module to display a prompt of abnormal detection when the difference between the troubleshooting detection result and the expiration detection result exceeds a preset reasonable difference interval, and otherwise controls the display module to display the expiration detection result.
When carrying out independent quick investigation and detection, quick investigation detection air pump follows gas sampling joint department extracts the gas that awaits measuring to quick investigation detection sensor, quick investigation detection sensor is right the gas that awaits measuring carries out alcohol detection, obtains investigation detection data and transmits for control module, control module is according to investigation detection data obtains the investigation testing result, initiative expiration detection sensor and initiative expiration detection air pump stop work.
The gas sampling sub comprises: the device comprises a shell, an air blowing air passage and an inspection air passage which are formed in the shell, and an air blowing port which is formed on the surface of the shell and is used for connecting a blowing nozzle; one end of the air blowing air passage is communicated with the air blowing port, the other end of the air blowing air passage is branched to form a first branch and a second branch, the first branch is communicated with the atmosphere, and the second branch is communicated with the active expiration detection sensor; one end of the investigation air passage is positioned in the air blowing opening, and the other end of the investigation air passage is communicated with the rapid investigation detection sensor.
The end face of one end of the inspection air channel is flush with the outer end face of the air blowing opening.
The air pumping flow of the rapid examination detection air pump during the rapid examination detection is smaller than the air pumping flow of the rapid examination detection air pump during the independent rapid examination detection when the active exhalation detection is carried out.
The invention also provides an alcohol detection method, which comprises the following steps:
providing a multifunctional alcohol detector which comprises a gas sampling joint, a rapid investigation detection sensor, an active expiration detection sensor, a rapid investigation detection air pump, an active expiration detection air pump and a control module, wherein the gas sampling joint is used for being connected with a blowing nozzle;
the gas sampling joint is respectively communicated with the rapid investigation detection sensor and the active expiration detection sensor, and the rapid investigation detection sensor and the active expiration detection sensor are respectively communicated with the rapid investigation detection air pump and the active expiration detection air pump; the rapid investigation detection sensor, the active expiration detection sensor, the rapid investigation detection air pump and the active expiration detection air pump are respectively electrically connected with the control module;
utilize multi-functional alcohol detector carries out initiative expiration and detects, quick investigation detection air pump is followed gas sampling joint department extraction gas that awaits measuring arrives in the quick investigation detection sensor, quick investigation detection sensor is right gas that awaits measuring carries out alcohol detection, obtains investigation data and transmits control module for, control module basis investigation data obtains investigation testing result, and simultaneously, initiative expiration detection air pump is followed gas sampling joint department extraction gas that awaits measuring arrives in the initiative expiration detection sensor, initiative expiration detection sensor is right gas that awaits measuring carries out alcohol detection, obtains initiative expiration data and transmits control module for, control module basis initiative expiration data obtains expiration data.
The multifunctional alcohol detector also comprises a display module electrically connected with the control module.
When the active expiration detection is carried out, the control module also controls the display module to display the investigation detection result and the expiration detection result.
When active expiration detection is carried out, the control module further compares the expiration detection result with a troubleshooting detection result, controls the display module to display a prompt of abnormal detection when the difference between the troubleshooting detection result and the expiration detection result exceeds a preset reasonable difference interval, and otherwise controls the display module to display the expiration detection result.
The alcohol detection method further comprises the following steps: utilize multi-functional alcohol detector carries out quick investigation detection alone, quick investigation detection air pump is followed gas sampling joint department extracts the gas that awaits measuring to quick investigation detection sensor in, quick investigation detection sensor is right the gas that awaits measuring carries out alcohol detection, obtains investigation data and transmits for control module, control module basis investigation data obtains the investigation testing result, initiative expiration detection sensor and initiative expiration detection air pump stop work.
The gas sampling sub comprises: the device comprises a shell, an air blowing air passage and an inspection air passage which are formed in the shell, and an air blowing port which is formed on the surface of the shell and is used for connecting a blowing nozzle; one end of the air blowing air passage is communicated with the air blowing port, the other end of the air blowing air passage is branched to form a first branch and a second branch, the first branch is communicated with the atmosphere, and the second branch is communicated with the active expiration detection sensor; one end of the investigation air passage is positioned in the air blowing opening, and the other end of the investigation air passage is communicated with the rapid investigation detection sensor.
The end face of one end of the inspection air channel is flush with the outer end face of the air blowing opening.
The air pumping flow of the rapid examination detection air pump during the rapid examination detection is smaller than the air pumping flow of the rapid examination detection air pump during the independent rapid examination detection when the active exhalation detection is carried out.
The invention has the beneficial effects that: the invention provides a multifunctional alcohol detector and an alcohol detection method. The multifunctional alcohol detector comprises a gas sampling joint, a rapid investigation detection sensor, an active expiration detection sensor, a rapid investigation detection air pump, an active expiration detection air pump, a control module and a display module, wherein the gas sampling joint is used for being connected with a blowing nozzle; the gas sampling joint is respectively communicated with a quick investigation detection sensor and an active expiration detection sensor, and the quick investigation detection sensor and the active expiration detection sensor are respectively communicated with a quick investigation detection air pump and an active expiration detection air pump; the rapid investigation detection sensor, the active expiration detection sensor, the rapid investigation detection air pump, the active expiration detection air pump and the display module are respectively electrically connected with the control module; the multifunctional alcohol detector can perform quick investigation detection while actively exhaling to detect, can remove detection abnormity by comparing results of actively exhaling to detect and quick investigation to detect, and improves detection accuracy and detection efficiency.
Drawings
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
FIG. 1 is a block diagram of the multifunctional alcohol tester according to the present invention;
FIG. 2 is a side cross-sectional view of the gas sampling adapter of the multi-function alcohol tester of the present invention;
FIG. 3 is a cross-sectional end view of the gas sampling adapter of the multi-functional alcohol detector of the present invention;
FIG. 4 is a side sectional view of the gas sampling adapter of the multifunctional alcohol tester of the present invention connected to a mouthpiece;
FIG. 5 is a flow chart of the alcohol detection method of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 1 to 4, the present invention provides a multifunctional alcohol detector, which includes a gas sampling connector 1 for connecting a mouthpiece 100, a rapid examination detection sensor 2, an active exhalation detection sensor 3, a rapid examination detection air pump 4, an active exhalation detection air pump 5, a control module 6, a display module 7, and a pressure flow sensor 8;
the gas sampling joint 1 is respectively communicated with the rapid investigation detection sensor 2, the active expiration detection sensor 3 and the pressure flow sensor 8, and the rapid investigation detection sensor 2 and the active expiration detection sensor 3 are respectively communicated with the rapid investigation detection air pump 4 and the active expiration detection air pump 5; the rapid investigation detection sensor 2, the active expiration detection sensor 3, the pressure flow sensor 8, the rapid investigation detection air pump 4, the active expiration detection air pump 5 and the display module 7 are respectively electrically connected with the control module 6;
when the single fast investigation and detection is carried out, the blowing nozzle 100 is not installed, the fast investigation and detection air pump 4 pumps the gas to be detected from the gas sampling connector 1 to the fast investigation and detection sensor 2, the fast investigation and detection sensor 2 carries out alcohol detection on the gas to be detected to obtain investigation detection data and transmits the investigation detection data to the control module 6, the control module 6 obtains the investigation detection result according to the investigation detection data and controls the display module 7 to display the investigation detection result, the active expiration detection sensor 3 and the active expiration detection air pump 5 stop working, the fast investigation detection mode can be called as single fast investigation, the investigation detection data can be a group of alcohol content values obtained in the whole detection process during the investigation detection, and the investigation detection result can be a final alcohol content value, such as 25mg/100ml, or a qualitative result, such as "alcohol" or "no alcohol";
when the active expiration detection is carried out, the blowing nozzle 100 is arranged, the rapid investigation detection air pump 4 pumps the gas to be detected from the gas sampling joint 1 to the rapid investigation detection sensor 2, the rapid troubleshooting detecting sensor 2 carries out alcohol detection on the gas to be detected to obtain troubleshooting detecting data and transmits the troubleshooting detecting data to the control module 6, the control module 6 obtains a troubleshooting detecting result according to the troubleshooting detecting data, meanwhile, the active expiration detection air pump 5 pumps the gas to be detected from the gas sampling joint 1 to the active expiration detection sensor 3, the active breath detection sensor 3 detects alcohol in the gas to be detected to obtain active breath detection data and transmits the active breath detection data to the control module 6, the control module 6 obtains breath detection results according to the active breath detection data, the fast screening detection mode simultaneously performed with the active exhalation detection can be referred to as simultaneous fast screening detection for short.
Optionally, when active expiration detection is performed, the control module further controls the display module to display a troubleshooting detection result and an expiration detection result.
Optionally, when active expiration detection is performed, the control module further compares the expiration detection result with a troubleshooting detection result, and controls the display module to display a prompt of detection abnormality when a difference between the troubleshooting detection result and the expiration detection result exceeds a preset reasonable difference interval, otherwise controls the display module to display the expiration detection result, and the reasonable difference interval can be set as required.
Specifically, when the gas sampling connector 1 is separately and rapidly arranged and detected, the gas sampling connector 1 is separated from the blowing nozzle 100, that is, the gas sampling connector 1 is not connected to the blowing nozzle 100, so as to prevent the blowing nozzle 100 from influencing the gas to be detected to enter the gas sampling connector 1.
Specifically, during active expiration detection, the gas sampling connector 1 is communicated with the mouthpiece 100, that is, the gas sampling connector 1 is connected to the mouthpiece 100, so that a person to be tested can blow a gas to be tested into the gas sampling connector 1 through the mouthpiece 100.
Specifically, the gas sampling joint 1 includes: a housing 11, an insufflation air passage 12 and an evacuation air passage 13 formed in the housing 11, and an insufflation port 14 formed in a surface of the housing 11 for connecting a mouthpiece 100; one end of the insufflation airway 12 is communicated with the insufflation port 14, the other end is branched to form a first branch 121, a second branch 122 and a third branch 123, the first branch 121 is communicated with the atmosphere, the second branch 122 is communicated with the active exhalation detection sensor 3, and the third branch 123 is communicated with the pressure flow sensor 8; one end of the investigation air channel 13 is positioned in the air blowing port 14, and the other end 124 is communicated with the rapid investigation detecting sensor 2.
It should be noted that, because one end of the inspection air channel 13 is located in the air blowing port 14, the other end 124 is communicated with the rapid inspection detection sensor 2, when the air sampling connector 1 is not connected with the blowing nozzle 100, the inspection air channel 13 can be sufficiently close to the mouth and nose position of the detected person, so as to ensure that the gas to be detected smoothly enters the inspection air channel 13, when the air sampling connector 1 is connected with the blowing nozzle 100, the detected person blows through the blowing nozzle 100, the gas to be detected simultaneously enters the inspection air channel 13 and the air blowing air channel 12, so that the rapid inspection detection and the active expiration detection can be simultaneously performed.
Preferably, the end face of one end of the air duct 13 is flush with the outer end face of the air blowing opening 14, so that the air duct 13 is closer to the mouth and nose of the person to be tested.
Preferably, the investigation detection data includes a plurality of investigation alcohol response values, and the control module 6 obtains an alcohol response curve according to the plurality of investigation alcohol response values, and uses the alcohol response curve as the investigation detection data.
Preferably, the active breath test data includes a breath alcohol response value, and the control module 6 uses the breath alcohol response value as the breath test result.
It is worth mentioning that when the active expiration detection is carried out, the rapid investigation detection is carried out at the same time, and whether the alcohol detection result is abnormal or not can be judged through the mutual comparison and verification of the expiration detection result and the investigation detection result;
for example, when the mouthpiece 100 is inserted, the investigation air passage 13 is located inside the air blowing port 14, when the person to be tested blows air through the mouthpiece 100, once the alcohol detector detects the blowing action, the rapid investigation detection is started at the same time, the rapid investigation detection air pump 4 and the rapid investigation detection sensor 2 are matched to perform continuous air extraction analysis, so as to obtain a continuous investigation alcohol response value in the period from the beginning of blowing to the end of blowing, the active exhalation detection is started at the end of blowing, and the active exhalation detection air pump 5 and the active exhalation detection sensor 3 actively sample and analyze, so as to obtain an exhalation alcohol response value.
During active expiration detection, the control module 6 compares the investigation detection result with the expiration detection result, and determines whether the detection result is abnormal, wherein one of the conditions is as follows: if the alcohol content is detected in the whole process from the beginning of blowing to the end of blowing, or the alcohol content exceeds a certain threshold value, and the alcohol content of the active expiration detection performed at the same time is zero, the active expiration detection can be considered to have false negative, the display module 7 displays 'detection error', and a traffic police is prompted that the active expiration detection has a problem and needs further processing, so that the occurrence of false negative is avoided. Another situation is that if the alcohol content is not detected in the whole process from the beginning of blowing to the end of blowing, but the alcohol concentration of the active breath detection result performed at the same time is very high or exceeds a certain threshold, it may be determined that the measurement of the active breath detection may be false positive, and the display module 7 displays "detection error" to prompt the traffic police that the active breath detection is problematic and needs further processing, thereby avoiding the occurrence of false positive.
Of course, the traffic police can directly observe the investigation detection result and the expiration detection result displayed on the display screen to perform manual comparison and judgment, which does not affect the implementation of the invention.
Of course, in the above two cases, it may be that the circuit or the sensor for fast checking and detecting in the active exhalation detection process has a problem, and actually, the active exhalation detection result is correct, and the final detection result of false positive or false negative is caused by the problem of the fast checking and detecting result, but even this is significant, at least it indicates that the apparatus has a problem, and it is necessary to find the reason and then continue to use the apparatus to ensure that no false active exhalation detection result is generated. Or we can say that, if the results of the rapid investigation detection in the two cases are right, when there is an obvious discrepancy between the two, it is certain that the result of the active exhalation detection is wrong, and since the result of the active exhalation detection involves penalty, the result must be as reliable as possible, therefore, the comparison and verification of the active exhalation detection and the rapid investigation detection are used to determine whether there is an obvious problem in the exhalation detection result, so as to prevent the error in the active exhalation detection result, which has a very good practical value.
Further, the rapid examination and detection air pump 4 is a continuous air pump, the active expiration detection air pump 5 is a reciprocating air pump, and during active expiration detection, the multifunctional alcohol detector of the present invention can also determine whether oral alcohol exists in the detection process, and the specific method can refer to the method of using one continuous air pump and one reciprocating air pump to detect oral alcohol as described in example two of the chinese patent with application No. 201510085606.4.
It is worth mentioning that, for the simultaneous rapid investigation, when the mouthpiece 100 is inserted and the active exhalation test is performed simultaneously, the gas extracted by the mouthpiece 100 is the gas which may contain high-concentration alcohol directly coming out from the alveoli of the tested person, and when the mouthpiece 100 is not inserted and the separate rapid investigation is performed, the gas which may contain alcohol near the nose of the tested person is extracted, because the high-concentration alcohol gas exhaled by the tested person is diluted by the air around the nose, the alcohol concentration entering the rapid investigation detection sensor 2 is much lower than the alcohol concentration entering the rapid investigation detection sensor 2 at the same time, and may differ by several times or even several tens of times, for example, the amount of alcohol gas with a concentration of 200mg/100ml entering the active exhalation detection sensor 3 at the active exhalation test may be only 0.3ml, if the fast investigation detection is performed at the same time, 0.3L/min is used as the air exhaust flow, and 5 seconds is used as the air exhaust time (actually, the active expiration time), the amount of the alcohol gas passing through the fast investigation detection sensor 2 can reach 25ml, the amount of the alcohol gas is 80 times more than that of the alcohol gas passing through the fast investigation detection sensor 2, and the entry of the alcohol gas into the fast investigation detection sensor 2 causes the signal saturation of the fast investigation detection sensor 2, which affects the next measurement, and the service life of the fast investigation detection sensor 2 is often affected in this case. However, if the single fast investigation and detection is performed, the concentration of the alcohol gas exhausted by the tested person is probably diluted several times due to the dilution of the air, the content of the alcohol gas entering the fast investigation and detection sensor 2 is greatly reduced, the existing fast investigation and detection sensor 2 and related circuits for fast investigation and detection are designed based on the function of the single fast investigation and detection, and if the detection is performed simultaneously with the active expiration detection, the problem of too much gas is required to be solved.
Therefore, the air pump 4 for quick inspection is also set to have the air pumping flow rate smaller than that of the air pump for quick inspection when the air pump is used for quick inspection independently.
In specific implementation, one method is as follows: because the operating voltage of air pump is related to the rotational speed of air pump motor, the higher the rotational speed the higher the voltage is, the more the gas volume of extraction, consequently, can set up the operating voltage that quick investigation detected air pump 4 was examined in quick row alone is greater than its operating voltage who examines in quick row simultaneously, so that the bleed-off flow of quick investigation detection air pump 4 when examining alone fast is greater than its bleed-off flow when examining fast simultaneously. For example, during the single fast inspection, the operating voltage of the fast inspection air pump 4 is 5V, the rotation speed is about 8000 rpm, and the extracted gas flow rate may be 0.5L/min, and during the simultaneous fast inspection, the operating voltage of the fast inspection air pump 4 is 3V, the rotation speed is 4000 rpm, and the extracted gas flow rate may be 0.1L/min, which is equivalent to that the extracted gas amount is 20% of the original value.
Another method is that, the actual pumping time of the fast inspection and detection air pump 4 during the single fast inspection and detection is longer than the actual pumping time of the fast inspection and detection air pump 4 during the simultaneous fast inspection and detection, so that the pumping flow of the fast inspection and detection air pump 4 during the single fast inspection and detection is greater than the pumping flow of the fast inspection and detection air pump 4 during the simultaneous fast inspection and detection, which can be implemented in a PWM power supply manner, for example: during the independent fast inspection and detection, the fast inspection and detection air pump 4 continuously works, and during the simultaneous fast inspection and detection, the fast inspection and detection air pump 4 is powered by a PWM mode, and the duty ratio of PWM is 25%, namely, the air pump works in the power supply mode for only 0.25 second in 1 second, namely, the fast inspection and detection air pump 4 works for 0.25 second every 1 second, and accordingly, the air suction amount is also reduced to 25% of the original air suction amount.
Referring to fig. 5, the present invention further provides an alcohol detection method, including the following steps:
providing a multifunctional alcohol detector which comprises a gas sampling joint 1, a rapid investigation detection sensor 2, an active expiration detection sensor 3, a rapid investigation detection air pump 4, an active expiration detection air pump 5, a control module 6, a display module 7 and a pressure flow sensor 8, wherein the gas sampling joint is used for being connected with a blowing nozzle 100;
the gas sampling joint 1 is respectively communicated with the rapid investigation detection sensor 2, the active expiration detection sensor 3 and the pressure flow sensor 8, and the rapid investigation detection sensor 2 and the active expiration detection sensor 3 are respectively communicated with the rapid investigation detection air pump 4 and the active expiration detection air pump 5; the rapid investigation detection sensor 2, the active expiration detection sensor 3, the pressure flow sensor 8, the rapid investigation detection air pump 4, the active expiration detection air pump 5 and the display module 7 are respectively electrically connected with the control module 6;
the multifunctional alcohol detector is used for carrying out independent rapid investigation detection, the rapid investigation detection air pump 4 extracts gas to be detected from the gas sampling connector 1 to the rapid investigation detection sensor 2, the rapid investigation detection sensor 2 carries out alcohol detection on the gas to be detected to obtain investigation detection data and transmits the investigation detection data to the control module 6, the control module 6 controls the display module 7 to display the investigation detection result according to the investigation detection data, and the active expiration detection sensor 3 and the active expiration detection air pump 5 stop working;
utilize multi-functional alcohol detector carries out initiative expiration detection, quick investigation detection air pump 4 is followed gas sampling joint 1 department extraction to be measured gas carries out alcohol detection to quick investigation detection sensor 2, quick investigation detection sensor 2 is right gas that awaits measuring carries out alcohol detection, obtains investigation detection data and transmits for control module 6, control module 6 basis investigation detection data obtains investigation testing result, simultaneously, initiative expiration detection air pump 5 is followed gas sampling joint 1 department extraction to be measured gas is to in the initiative expiration detection sensor 3, initiative expiration detection sensor 3 is right gas that awaits measuring carries out alcohol detection, obtains initiative expiration detection data and transmits for control module 6, control module 6 basis initiative expiration detection data obtains expiration detection result.
Optionally, when active expiration detection is performed, the control module 6 further controls the display module 7 to display a troubleshooting detection result and an expiration detection result.
Optionally, when active breath detection is performed, the control module 6 further compares the breath detection result with the investigation detection result, and controls the display module 7 to display a prompt indicating that detection is abnormal when the difference between the investigation detection result and the breath detection result exceeds a preset reasonable difference interval, otherwise controls the display module 6 to display the breath detection result, and the reasonable difference interval can be adjusted according to actual needs.
Specifically, when the gas sampling connector 1 is separately and rapidly arranged and detected, the gas sampling connector 1 is separated from the blowing nozzle 100, that is, the gas sampling connector 1 is not connected to the blowing nozzle 100, so as to prevent the blowing nozzle 100 from influencing the gas to be detected to enter the gas sampling connector 1.
Specifically, during active expiration detection, the gas sampling connector 1 is communicated with the mouthpiece 100, that is, the gas sampling connector 1 is connected to the mouthpiece 100, so that a person to be tested can blow a gas to be tested into the gas sampling connector 1 through the mouthpiece 100.
Specifically, the gas sampling joint 1 includes: a housing 11, an insufflation air passage 12 and an evacuation air passage 13 formed in the housing 11, and an insufflation port 14 formed in a surface of the housing 11 for connecting a mouthpiece 100; one end of the insufflation airway 12 is communicated with the insufflation port 14, the other end is branched to form a first branch 121, a second branch 122 and a third branch 123, the first branch 121 is communicated with the atmosphere, the second branch 122 is communicated with the active exhalation detection sensor 3, and the third branch 123 is communicated with the pressure flow sensor 8; one end of the investigation air channel 13 is positioned in the air blowing port 14, and the other end 124 is communicated with the rapid investigation detecting sensor 2.
It should be noted that, because one end of the inspection air channel 13 is located in the air blowing port 14, the other end 124 is communicated with the rapid inspection detection sensor 2, when the air sampling connector 1 is not connected with the blowing nozzle 100, the inspection air channel 13 can be sufficiently close to the mouth and nose position of the detected person, so as to ensure that the gas to be detected smoothly enters the inspection air channel 13, when the air sampling connector 1 is connected with the blowing nozzle 100, the detected person blows through the blowing nozzle 100, the gas to be detected simultaneously enters the inspection air channel 13 and the air blowing air channel 12, so that the rapid inspection detection and the active expiration detection can be simultaneously performed.
Preferably, the end face of one end of the air duct 13 is flush with the outer end face of the air blowing opening 14, so that the air duct 13 is closer to the mouth and nose of the person to be tested.
Preferably, the alcohol response curve is obtained by the control module 6 according to the plurality of alcohol response values, and the alcohol response curve is used as the alcohol checking result.
Preferably, the active breath test data includes a breath alcohol response value, and the control module 6 uses the breath test result as the insufflation response value.
It is worth mentioning that when the active expiration detection is carried out, the rapid investigation detection is carried out at the same time, and whether the detection is abnormal or not can be judged by comparing and verifying the expiration detection result and the investigation detection result;
for example, when the mouthpiece 100 is inserted, the investigation air passage 13 is located inside the air blowing port 14, when the person to be tested blows air through the mouthpiece 100, once the alcohol detector detects the blowing action, the rapid investigation detection is started at the same time, the rapid investigation detection air pump 4 and the rapid investigation detection sensor 2 are matched to perform continuous air extraction analysis, so as to obtain a continuous investigation alcohol response value in the period from the beginning of blowing to the end of blowing, the active exhalation detection is started at the end of blowing, and the active exhalation detection air pump 5 and the active exhalation detection sensor 3 actively sample and analyze, so as to obtain an exhalation alcohol response value.
During active expiration detection, the control module 6 compares the investigation detection result with the expiration detection result to determine whether the detection is abnormal, and one of the conditions is as follows: if the alcohol content is detected in the whole process from the beginning of blowing to the end of blowing, or the alcohol content exceeds a certain threshold value, and the alcohol content of the active expiration detection performed at the same time is zero, the active expiration detection can be considered to have false negative, the display module 7 displays 'detection error', and a traffic police is prompted that the active detection result has a problem and needs to be further processed, so that the occurrence of false negative is avoided. Another situation is that if the alcohol content is not detected in the whole process from the beginning of blowing to the end of blowing, but the alcohol concentration of the active breath detection result performed at the same time is very high or exceeds a certain threshold, it may be determined that the measurement of the active breath detection may be false positive, and the display module 7 displays "detection error" to prompt the traffic police that the active detection is problematic and needs further processing, thereby avoiding the occurrence of false positive.
Of course, the traffic police can directly read the investigation detection result and the expiration detection result to perform manual comparison and judgment to judge whether the abnormal operation occurs in the detection, which does not affect the implementation of the invention.
Of course, in the above two cases, it may be that the circuit or the sensor for fast checking and detecting in the active exhalation detection process is in trouble, actually, the active exhalation detection result is correct, and the final detection result of false positive or false negative is caused by the problem of the fast checking and detecting result, but even this is meaningful, at least it indicates that the apparatus is in trouble, and it is necessary to find the cause and then continue to use the apparatus to ensure that no false exhalation detection result is generated. Or we can say that, if the results of the rapid investigation detection in the two cases are right, when there is an obvious discrepancy between the two, it is certain that the result of the active exhalation detection is wrong, and because the result of the active exhalation detection relates to penalty, the result must be as reliable as possible, therefore, the comparison and verification of the active exhalation detection and the rapid investigation detection are used to judge whether there is an obvious problem in the exhalation detection result, so as to prevent the error in the active exhalation detection result, which has a good practical value.
Further, the rapid examination and detection air pump 4 is a continuous air pump, the active expiration detection air pump 5 is a reciprocating air pump, and during active expiration detection, the multifunctional alcohol detector of the present invention can also determine whether oral alcohol exists in the detection process, and the specific method can refer to the method of using one continuous air pump and one reciprocating air pump to detect oral alcohol as described in example two of the chinese patent with application No. 201510085606.4.
It is worth mentioning that, for the simultaneous rapid investigation, when the mouthpiece 100 is inserted and the active exhalation test is performed simultaneously, the gas extracted by the mouthpiece 100 is the gas which may contain high-concentration alcohol directly coming out from the alveoli of the tested person, and when the mouthpiece 100 is not inserted and the separate rapid investigation is performed, the gas which may contain alcohol near the nose of the tested person is extracted, because the high-concentration alcohol gas exhaled by the tested person is diluted by the air around the nose, the alcohol concentration entering the rapid investigation detection sensor 2 is much lower than the alcohol concentration entering the rapid investigation detection sensor 2 at the same time, and may differ by several times or even several tens of times, for example, the amount of alcohol gas with a concentration of 200mg/100ml entering the active exhalation detection sensor 3 at the active exhalation test may be only 0.3ml, if the fast investigation detection is performed at the same time, 0.3L/min is used as the air exhaust flow, and 5 seconds is used as the air exhaust time (actually, the active expiration time), the amount of the alcohol gas passing through the fast investigation detection sensor 2 can reach 25ml, the amount of the alcohol gas is 80 times more than that of the alcohol gas passing through the fast investigation detection sensor 2, and the entry of the alcohol gas into the fast investigation detection sensor 2 causes the signal saturation of the fast investigation detection sensor 2, which affects the next measurement, and the service life of the fast investigation detection sensor 2 is often affected in this case. However, if the single fast investigation and detection is performed, the concentration of the alcohol gas exhausted by the tested person is possibly diluted several times due to the dilution of the air, the content of the alcohol gas entering the fast investigation and detection sensor 2 is greatly reduced, the existing fast investigation and detection sensor 2 and related circuits for fast investigation and detection are designed based on the single fast investigation and detection function, and if the detection is performed simultaneously with the active expiration detection, the problem of too much gas is required to be solved.
Therefore, the air pump 4 for quick inspection and detection is also set to have the air pumping flow rate smaller than that of the air pump for quick inspection and detection alone when the air pump is used for quick inspection and detection at the same time.
In specific implementation, one method is as follows: because the operating voltage of air pump is related to the rotational speed of air pump motor, the higher the rotational speed the higher the voltage is, the more the gas volume of extraction, consequently, can set up the operating voltage of quick investigation detection air pump 4 when quick investigation is examined alone is greater than its operating voltage when quick investigation is examined simultaneously respectively, so that the bleed-off flow of quick investigation detection air pump 4 when quick investigation is examined alone is greater than its bleed-off flow when quick investigation is examined simultaneously. For example, during the single fast inspection, the operating voltage of the fast inspection air pump 4 is 5V, the rotation speed is about 8000 rpm, and the extracted air flow rate may be 0.5l/min, and during the simultaneous fast inspection, the operating voltage of the fast inspection air pump 4 is 3V, the rotation speed is 4000 rpm, and the extracted air flow rate may be 0.1l/min, which is equivalent to that the extracted air amount is 20% of the original air amount.
Another method is that, the actual pumping time of the fast inspection and detection air pump 4 during the single fast inspection and detection is longer than the actual pumping time of the fast inspection and detection air pump 4 during the simultaneous fast inspection and detection, so that the pumping flow of the fast inspection and detection air pump 4 during the single fast inspection and detection is greater than the pumping flow of the fast inspection and detection air pump 4 during the simultaneous fast inspection and detection, which can be implemented in a PWM power supply manner, for example: during the independent fast inspection and detection, the fast inspection and detection air pump 4 continuously works, and during the simultaneous fast inspection and detection, the fast inspection and detection air pump 4 is powered by a PWM mode, and the duty ratio of PWM is 25%, namely, the air pump works in the power supply mode for only 0.25 second in 1 second, namely, the fast inspection and detection air pump 4 works for 0.25 second every 1 second, and accordingly, the air suction amount is also reduced to 25% of the original air suction amount.
In summary, the present invention provides a multifunctional alcohol detector and an alcohol detection method. The multifunctional alcohol detector comprises a gas sampling joint, a rapid investigation detection sensor, an active expiration detection sensor, a rapid investigation detection air pump, an active expiration detection air pump, a control module and a display module, wherein the gas sampling joint is used for being connected with a blowing nozzle; the gas sampling joint is respectively communicated with a quick investigation detection sensor and an active expiration detection sensor, and the quick investigation detection sensor and the active expiration detection sensor are respectively communicated with a quick investigation detection air pump and an active expiration detection air pump; the rapid investigation detection sensor, the active expiration detection sensor, the rapid investigation detection air pump, the active expiration detection air pump and the display module are respectively electrically connected with the control module; the multifunctional alcohol detector can perform quick investigation detection while actively exhaling to detect, can remove detection abnormity by comparing results of actively exhaling to detect and quick investigation to detect, and improves detection accuracy and detection efficiency.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (16)
1. A multifunctional alcohol detector is characterized by comprising a gas sampling joint (1) used for connecting a blowing nozzle (100), a rapid investigation detection sensor (2), an active expiration detection sensor (3), a rapid investigation detection air pump (4), an active expiration detection air pump (5) and a control module (6);
the gas sampling joint (1) is respectively communicated with the rapid investigation detection sensor (2) and the active expiration detection sensor (3), and the rapid investigation detection sensor (2) and the active expiration detection sensor (3) are respectively communicated with the rapid investigation detection air pump (4) and the active expiration detection air pump (5); the rapid investigation detection sensor (2), the active expiration detection sensor (3), the rapid investigation detection air pump (4) and the active expiration detection air pump (5) are respectively electrically connected with the control module (6);
when active expiration detection is carried out, the rapid investigation detection air pump (4) pumps the gas to be detected from the gas sampling joint (1) to the rapid investigation detection sensor (2), the rapid investigation detection sensor (2) carries out alcohol detection on the gas to be detected to obtain investigation detection data and transmits the investigation detection data to the control module (6), the control module (6) obtains a checking detection result according to the checking detection data, meanwhile, the active expiration detection air pump (5) pumps the gas to be detected from the gas sampling joint (1) to the active expiration detection sensor (3), the active breath detection sensor (3) detects alcohol in the gas to be detected to obtain active breath detection data and transmits the active breath detection data to the control module (6), and the control module (6) obtains an expiration detection result according to the active expiration detection data.
2. The multi-functional alcohol detector according to claim 1, further comprising a display module (7) electrically connected to the control module (6).
3. The multi-functional alcohol detector according to claim 2, wherein the control module (6) further controls the display module (7) to display the examination result and the breath detection result when performing the active breath detection.
4. The multi-functional alcohol detector according to claim 2, wherein the control module (6) further compares the breath test result with a troubleshooting test result when performing the active breath test, and controls the display module (7) to display a prompt of the detection abnormality when the difference between the troubleshooting test result and the breath test result exceeds a preset reasonable difference interval, or controls the display module (7) to display the breath test result otherwise.
5. The multifunctional alcohol tester according to claim 1, wherein when performing single rapid test, the rapid test air pump (4) pumps the gas to be tested from the gas sampling connector (1) to the rapid test sensor (2), the rapid test sensor (2) performs alcohol test on the gas to be tested, test data is obtained and transmitted to the control module (6), the control module (6) obtains test results according to the test data, and the active breath test sensor (3) and the active breath test air pump (5) stop working.
6. The multi-functional alcohol detector of claim 1, wherein the gas sampling adapter (1) comprises: a shell (11), an air blowing air passage (12) and an inspection air passage (13) which are formed in the shell (11), and an air blowing opening (14) which is formed on the surface of the shell (11) and is used for connecting a blowing nozzle (100); one end of the air blowing air passage (12) is communicated with the air blowing port (14), the other end of the air blowing air passage is branched to form a first branch (121) and a second branch (122), the first branch (121) is communicated with the atmosphere, and the second branch (122) is communicated with the active expiration detection sensor (3); one end of the investigation air passage (13) is positioned in the air blowing port (14), and the other end of the investigation air passage is communicated with the rapid investigation detection sensor (2).
7. The multi-functional alcohol detector according to claim 6, wherein an end surface of one end of the inspection air passage (13) is flush with an outer end surface of the air blowing port (14).
8. The multi-functional alcohol detector of claim 5, wherein the rapid breath test air pump (4) is configured to perform a rapid breath test at a lower air extraction flow rate than a single rapid breath test.
9. An alcohol detection method is characterized by comprising the following steps:
providing a multifunctional alcohol detector which comprises a gas sampling joint (1) used for connecting a blowing nozzle (100), a rapid investigation detection sensor (2), an active expiration detection sensor (3), a rapid investigation detection air pump (4), an active expiration detection air pump (5) and a control module (6);
the gas sampling joint (1) is respectively communicated with the rapid investigation detection sensor (2) and the active expiration detection sensor (3), and the rapid investigation detection sensor (2) and the active expiration detection sensor (3) are respectively communicated with the rapid investigation detection air pump (4) and the active expiration detection air pump (5); the rapid investigation detection sensor (2), the active expiration detection sensor (3), the rapid investigation detection air pump (4) and the active expiration detection air pump (5) are respectively electrically connected with the control module (6);
the multifunctional alcohol detector is utilized to carry out active expiration detection, the rapid investigation detection air pump (4) extracts gas to be detected from the gas sampling joint (1) to the rapid investigation detection sensor (2), the rapid investigation detection sensor (2) carries out alcohol detection on the gas to be detected to obtain investigation detection data and transmits the investigation detection data to the control module (6), the control module (6) obtains a checking detection result according to the checking detection data, meanwhile, the active expiration detection air pump (5) pumps the gas to be detected from the gas sampling joint (1) to the active expiration detection sensor (3), the active breath detection sensor (3) detects alcohol in the gas to be detected to obtain active breath detection data and transmits the active breath detection data to the control module (6), and the control module (6) obtains an expiration detection result according to the active expiration detection data.
10. The alcohol testing method according to claim 9, wherein the multi-function alcohol tester further comprises a display module (7) electrically connected to the control module (6).
11. The alcohol detection method according to claim 10, wherein the control module (6) further controls the display module (7) to display a troubleshooting test result and an expiration test result when performing the active expiration test.
12. The alcohol detection method according to claim 10, wherein when performing active breath detection, the control module (6) further compares the breath detection result with a troubleshooting detection result, and controls the display module (7) to display a prompt of detection abnormality when a difference between the troubleshooting detection result and the breath detection result exceeds a preset reasonable difference interval, or controls the display module (7) to display the breath detection result.
13. The alcohol detection method of claim 9, further comprising:
utilize multi-functional alcohol detector carries out quick investigation detection alone, quick investigation detection air pump (4) are followed gas sampling joint (1) department extraction gas that awaits measuring to quick investigation detection sensor (2), quick investigation detection sensor (2) are right gas that awaits measuring carries out alcohol detection, obtains investigation test data and transmits for control module (6), control module (6) are according investigation test data obtains investigation testing result, initiative expiration detection sensor (3) and initiative expiration detection air pump (5) stop work.
14. The alcohol detection method according to claim 9, wherein the gas sampling joint (1) comprises: a shell (11), an air blowing air passage (12) and an inspection air passage (13) which are formed in the shell (11), and an air blowing opening (14) which is formed on the surface of the shell (11) and is used for connecting a blowing nozzle (100); one end of the air blowing air passage (12) is communicated with the air blowing port (14), the other end of the air blowing air passage is branched to form a first branch (121) and a second branch (122), the first branch (121) is communicated with the atmosphere, and the second branch (122) is communicated with the active expiration detection sensor (3); one end of the investigation air passage (13) is positioned in the air blowing port (14), and the other end of the investigation air passage is communicated with the rapid investigation detection sensor (2).
15. The alcohol detecting method according to claim 14, wherein an end surface of one end of the inspection air path (13) is flush with an outer end surface of the air blowing port (14).
16. The alcohol testing method according to claim 13, wherein the rapid breath test air pump (4) performs a rapid breath test at a lower air extraction flow rate than that of the rapid breath test alone.
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