CN112485456A - Correction method for quickly checking alcohol detection result and alcohol detector - Google Patents
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Abstract
The invention provides a correction method for quickly checking an alcohol detection result and an alcohol detector. The correction method for the rapid troubleshooting alcohol detection result comprises the following steps: step S1, providing an alcohol detector; s2, blowing air to the alcohol detector by the object to be detected, and carrying out active detection and continuous and rapid investigation detection by the alcohol detector; step S3, the alcohol detector respectively determines an active detection result and a preliminary investigation detection result according to the active detection and the rapid investigation detection; and S4, correcting the preliminary investigation detection result according to a preset correction algorithm to obtain a target investigation detection result, and correcting the preliminary investigation detection result through the preset correction algorithm, so that the accuracy of rapid investigation detection can be improved, and the alcohol detection effect can be improved.
Description
Technical Field
The invention relates to the technical field of alcohol detection, in particular to a correction method for quickly checking an alcohol detection result and an alcohol detector.
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 alcohol detection is carried out through the breath alcohol detector if punishment is required. When drunk driving is checked, a traffic police generally uses a rapid troubleshooting alcohol instrument for preliminary screening, and uses a breath alcohol detector for active breath alcohol detection (active detection or active breath detection for short) when drunk driving is suspected, so that the efficiency can be improved, and the justice of law enforcement is ensured.
Traffic polices often encounter "abnormal" alcohol test results when performing active tests. Generally speaking, the results of "abnormal" alcohol tests are classified into two categories, one is that the tested person has obvious alcohol content in the expired air, but the results of active tests are that no alcohol exists or the alcohol content is very low, which is called false negative. For example, in a certain case, a driver quickly checks that the detection result of the alcohol detector is positive, even the driver smells obvious alcohol smell by a traffic police, but the active detection result is zero, blood drawing needs to be carried out, the detection result is that the alcohol content in blood is 90mg/100ml, and the situation is false negative. The other type is that the tested person has no alcohol content in the expired air, but the active 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 active test result is 150mg/100ml, the driver is taken to perform a blood drawing test according to the rule, but the blood drawing test result is zero, and the case is a false positive. The occurrence of false positive and false negative indicates that the breath alcohol active test result is obviously abnormal. The active detection result can be used as a punishment basis, so that the abnormal active detection result can cause disputes of police and people, increase the workload of traffic police and delay the time of a driver, and the problem is a technical problem which needs to be solved urgently in the drunk driving investigation and treatment process.
In order to solve the problem that the active detection often encounters an abnormal alcohol detection result during the breath alcohol content detection, the inventor of the application provides a new detection method in the previously applied multifunctional alcohol detector and alcohol detection method with the application number of 202010520219.X, namely, the continuous and rapid examination and detection are simultaneously carried out during the breath alcohol active detection, and the comparison of the detection results of the two is used for prompting whether the active detection is abnormal or not. Further experiments by the inventor of the application show that in the method, due to different blowing time lengths of the tested persons, the results of the quick investigation and measurement are obviously different, and the trend is that the shorter the blowing time length is, the smaller the result of the quick investigation and measurement is, which can cause wrong judgment, so that the accuracy of continuous quick investigation and detection simultaneously performed with active detection needs to be improved.
Disclosure of Invention
The invention aims to provide a correction method for quickly checking an alcohol detection result, which can improve the detection accuracy.
The invention also aims to provide the alcohol detector which can improve the detection accuracy.
In order to achieve the purpose, the invention provides a correction method for quickly checking an alcohol detection result, which comprises the following steps:
step S1, providing an alcohol detector;
s2, blowing air to the alcohol detector by the object to be detected, and carrying out active detection and continuous and rapid investigation detection by the alcohol detector;
step S3, the alcohol detector respectively determines an active detection result and a preliminary investigation detection result according to the active detection and the continuous quick investigation detection;
and step S4, correcting the preliminary investigation detection result according to a preset correction algorithm to obtain a target investigation detection result.
Optionally, the preset correction algorithm in step S2 is:
K＝y*(1+b*e(-a*x))
and K is a target investigation detection result, y is a preliminary investigation detection result, x is the blowing time length of the object to be detected blowing the alcohol detector, e is a natural constant, a and b are preset constants, and a and b are both greater than 0.
Optionally, the preset correction algorithm in step S2 is:
when x < q, K ═ y (1+ b · e)(-a*x))；
When x is more than or equal to q, K is y;
the method comprises the following steps of firstly detecting the alcohol content in an alcohol detector, detecting the alcohol content in the alcohol detector, and then carrying out a target investigation on the alcohol content in the alcohol detector, wherein K is a target investigation detection result, y is a preliminary investigation detection result, x is the air blowing time length of the alcohol detector, e is a natural constant, a and b are preset constants, a and b are both greater than 0, and q is a preset time length threshold value.
The steps between the step S1 and the step S2 further include the following steps:
providing alcohol gas, wherein the concentration of the alcohol gas is i, and i is greater than 0;
blowing the alcohol gas with the concentration i into the alcohol detector for j seconds, and simultaneously carrying out continuous and rapid investigation detection on the blown alcohol gas by the alcohol detector, wherein j is greater than 0;
when the blowing is finished, the alcohol detector detects that the concentration of the alcohol gas is q through continuous and rapid investigation detection;
determining a calibration coefficient of the alcohol detector during continuous and rapid checking and detection as P, wherein P is q/i;
the step of determining the preliminary examination detection result in step S3 includes:
acquiring an alcohol response value f obtained by the alcohol detector through continuous and rapid investigation detection when the air blowing is finished in the step S2;
and determining a preliminary investigation detection result according to an alcohol response value f and a calibration coefficient P, which are obtained by the alcohol detector through continuous and rapid investigation detection when the air blowing is finished in the step S2, wherein the preliminary investigation detection result is equal to f/P.
Setting specific values of a and b according to the following steps:
step S21, providing an alcohol simulator, generating alcohol gas by using the alcohol simulator, and blowing the alcohol detector for n seconds, wherein n is greater than or equal to 10;
s22, continuously and rapidly checking and detecting the alcohol detector within n seconds of blowing the alcohol simulator to the alcohol detector to obtain an alcohol response curve, wherein the n second alcohol response value on the alcohol response curve is h;
step S23, assigning values to a and b respectively;
step S24, assigning a and b, K ═ h, x ═ m, and substituting the formula y ═ K/(1+ b × e)(-a*x)) And calculating to obtain the reference value h/(1+ b × e) of the alcohol in the mth second(-a*m)) M is greater than 0 and less than n;
and step S25, comparing the mth second alcohol response value on the alcohol response curve in the step S22 with the mth second alcohol reference value calculated in the step S24, if the difference between the mth second alcohol response value and the mth second alcohol reference value is smaller than a preset difference range, determining that the final values of a and b are respectively equal to the current assignment, otherwise, re-assigning the values of a and b, and returning to the step S24.
The correction method for the rapid troubleshooting alcohol detection result further comprises the following steps: and step S5, comparing the active detection result with the target investigation detection result, if the difference between the active detection result and the target investigation detection result exceeds a preset reasonable difference range, judging that the detection is abnormal, otherwise, judging that the detection is normal.
The present invention also provides an alcohol detector, comprising: the device comprises a detection module and a correction module connected with the detection module;
the detection module is used for carrying out active detection and simultaneously carrying out continuous quick investigation detection when the detected object blows air to the alcohol detector, and respectively obtaining an active detection result and a preliminary investigation detection result according to the active detection and the continuous quick investigation detection;
and the correction module is used for correcting the preliminary investigation detection result according to a preset correction algorithm to obtain a target investigation detection result.
Optionally, the preset correction algorithm is:
K＝y*(1+b*e(-a*x))
the method comprises the following steps of detecting the alcohol content in the alcohol detector, wherein K is a target investigation detection result, y is a preliminary investigation detection result, x is the blowing time length of blowing air to the alcohol detector, e is a natural constant, a and b are preset constants, and a and b are both larger than 0.
Optionally, the preset correction algorithm is:
when x < q, K ═ y (1+ b · e)(-a*x))；
When x is more than or equal to q, K is y;
the method comprises the following steps of detecting the alcohol content in the alcohol detector, wherein K is a target investigation detection result, y is a preliminary investigation detection result, x is the blowing time length of blowing air to the alcohol detector, e is a natural constant, a and b are preset constants, a and b are both larger than 0, and q is a preset time length threshold value.
The alcohol detector also comprises a comparison module connected with the detection module and the correction module;
the comparison module is used for comparing the active detection result with the target investigation detection result, if the difference between the active detection result and the target investigation detection result exceeds a preset reasonable difference range, the detection is judged to be abnormal, otherwise, the detection is judged to be normal.
The invention has the beneficial effects that: the invention provides a correction method for quickly checking an alcohol detection result, which comprises the following steps: step S1, providing an alcohol detector; s2, blowing air to the alcohol detector by the object to be detected, and carrying out active detection and continuous and rapid investigation detection by the alcohol detector; step S3, the alcohol detector respectively determines an active detection result and a preliminary investigation detection result according to the active detection and the continuous quick investigation detection; and S4, correcting the preliminary investigation detection result according to a preset correction algorithm to obtain a target investigation detection result, and correcting the preliminary investigation detection result through the preset correction algorithm, so that the accuracy of continuous and rapid investigation detection can be improved, and the alcohol detection effect can be improved. The invention also provides an alcohol detector which can improve the detection accuracy.
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 flow chart of a method for correcting a rapid alcohol test result according to the present invention;
FIG. 2 is a block diagram of the alcohol detector of the present invention;
FIG. 3 is an alcohol response curve obtained by continuous and rapid investigation and detection of an alcohol detector when the air blowing time is 10 seconds;
FIG. 4 is an alcohol response curve obtained by continuous and rapid investigation and detection of an alcohol detector when the air blowing duration is 3 seconds;
FIG. 5 is an alcohol response curve obtained by continuous and rapid investigation and detection of an alcohol detector when the air blowing duration is 4 seconds;
FIG. 6 is a graph of the alcohol response curve obtained by continuous rapid investigation and detection of the alcohol detector when the air blow duration is 5 seconds.
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, the present invention provides a method for correcting a fast alcohol test result, comprising the following steps:
in step S1, an alcohol detector is provided.
Specifically, the alcohol detector has an active detection function and a continuous and rapid troubleshooting detection function, can perform active detection alone, can perform continuous and rapid troubleshooting detection alone, and can perform continuous and rapid troubleshooting detection while performing active detection.
And step S2, blowing air to the alcohol detector by the detected object, and carrying out active detection and continuous and rapid investigation detection by the alcohol detector.
Generally, the continuous duration of the continuous quick investigation detection is equal to the air blowing duration of the tested object blowing air into the alcohol detector.
Generally speaking, the air blowing time of the tested object blowing air to the alcohol tester is generally 3-5 seconds.
For a method for performing continuous and rapid inspection and detection, please refer to the chinese patent application document with the application number of 202010520219.X, entitled "multifunctional alcohol detector and alcohol detection method", which was previously applied by the inventor of the present application.
Further, a step of calibrating the alcohol detector is further included between the step S1 and the step S2, where the calibration specifically includes calibrating the active detection function and calibrating the continuous fast-check detection function.
The calibration of the continuous quick-check detection function specifically comprises the following steps:
providing an alcohol gas having a concentration i, i being greater than 0, the alcohol gas being producible by a wet alcohol simulator;
blowing the alcohol gas with the concentration i into the alcohol detector for j seconds, and simultaneously carrying out continuous and rapid investigation detection on the blown alcohol gas by the alcohol detector, wherein j is greater than 0;
when the blowing is finished, the alcohol detector detects that the concentration of the alcohol gas is q through continuous and rapid investigation detection;
and determining the calibration coefficient of the alcohol detector at the time of continuous and quick checking as P, wherein P is q/i.
For example, in some embodiments of the present invention, the calibration of the continuous fast check detection function is specifically: and blowing the 110mg/100ml alcohol gas into the alcohol detector for 4 seconds, and simultaneously carrying out continuous and rapid investigation detection on the blown alcohol gas by the alcohol detector, wherein when the blowing is finished, the concentration of the alcohol gas measured by the alcohol detector at the end of the continuous and rapid investigation detection of the blowing is q mg/100ml, so that the calibration coefficient of the alcohol detector at the time of the continuous and rapid investigation detection is determined to be P, and P is q/110.
Step S3, the alcohol detector respectively determines an active detection result and a preliminary investigation detection result according to the active detection and the continuous quick investigation detection;
specifically, the step of determining the preliminary examination detection result in step S3 includes: acquiring an alcohol response value f obtained by the alcohol detector through continuous and rapid investigation detection when the air blowing is finished in the step S2; and determining a preliminary investigation detection result according to an alcohol response value f and a calibration coefficient P, which are obtained by the alcohol detector through continuous and rapid investigation detection when the air blowing is finished in the step S2, wherein the preliminary investigation detection result is equal to f/P.
And step S4, correcting the preliminary investigation detection result according to a preset correction algorithm to obtain a target investigation detection result.
It should be noted that, in order to determine the correction algorithm, the continuous and rapid examination and detection function of the alcohol detector is tested.
In one test, the air blowing time during continuous and rapid inspection and calibration is 4 seconds, after calibration, an alcohol simulator is used as a standard alcohol gas generation device, when the concentration of alcohol generated by the alcohol simulator is 115mg/100ml, air is blown into an alcohol detector, one-time active inspection and continuous and rapid inspection and detection are carried out while air is blown, and an active detection result and a preliminary inspection and detection result are respectively obtained after air blowing is finished.
In this test, for reference, when the air blowing time was 10s, the alcohol response curve obtained by the continuous quick check test is shown in fig. 3.
During actual detection, the actual air blowing time of the detected object rarely reaches 10s, and is generally concentrated on 3 to 5s, so in the test, the air blowing time is respectively selected to be 3s, 4s and 5s as investigation points.
In the continuous and rapid investigation test, the alcohol concentration at the moment when the air blowing is finished on the alcohol response curve obtained by the continuous and rapid investigation test is generally used as the preliminary investigation test result of the continuous and rapid investigation test. The blowing time lengths are respectively corresponding to 3s, 4s and 5s, and as shown in fig. 4 to 6, when the blowing time length is 3 seconds, the preliminary investigation detection result is 99mg/100 ml; when the blowing time is 4 seconds, the preliminary investigation detection result is 113mg/100 ml; when the air blowing time is 5 seconds, the preliminary investigation result is 119mg/100 ml.
Generally, the result of the active detection is relatively stable, and in the test, the active detection results obtained by the active detection with the blowing time length of 3s, 4s and 5s are all 114mg/100 ml.
The results are summarized in Table 1:
TABLE 1
As shown in table 1, when the air blowing duration is changed during the test, the active detection result is stable and unchanged, the preliminary investigation detection result is greatly different, the difference between the active detection result and the preliminary investigation detection result is also large, and the difference is more obvious when the air blowing duration is shorter.
It should be noted that, the test is performed by using 4 seconds as the calibration blowing time, the calibration blowing time is not fixed, and in some cases, the test may also be performed by using 3 seconds as the calibration blowing time, and at this time, the difference between the preliminary investigation detection result obtained when the blowing time is 5 seconds and the active detection result is greater than that obtained after the calibration is performed by using 4 seconds as the calibration blowing time.
Further tests also show that if the alcohol concentration set on the alcohol simulator is higher, such as 200mg/100ml, the deviation is larger, that is, when other conditions are unchanged, the higher the concentration is, the different blowing time lengths are, the poorer the accuracy of the preliminary investigation detection result is, and the larger the difference between the active detection result and the preliminary investigation detection result is.
Further, through tests on alcohol gases with different concentrations, it is also found that the alcohol concentration on the alcohol response curve of the preliminary investigation result rapidly rises after the beginning of blowing, the speed increase is significantly slowed after about 2 seconds, but will increase all the time, but the trend of the increase is significantly slower, and if a value long enough for the time of the alcohol response curve of the preliminary investigation test result is taken as the final measurement result, the change will be smaller and smaller, for example, if the alcohol concentration 113mg/100ml at the time of the air-blowing time period of 4 seconds is compared with 119mg/100ml at the time of the air-blowing time period of 5 seconds, the difference between the two is not more than-5%, which is a significant improvement over the deviation of-17% as a result of the alcohol concentrations of 99mg/100ml and 119mg/100ml for the preceding 3 seconds and 5 seconds of insufflation.
Further, it was found through experiments that the repeatability and stability of the response of alcohol gas with determined concentration on the instrument are good, and when the air blowing time is long enough, for example, after more than 5 seconds, the alcohol response curve of the preliminary investigation test result is similar to a sigmoid curve (growth curve or Logistic curve), and the rule of the data can be described through sigmoid curve fitting (growth curve fitting or Logistic curve fitting).
It can thus be determined that the preset correction algorithm can be: k ═ y [ (1+ b [ ]) e(-a*x))
And K is a target investigation detection result, y is a preliminary investigation detection result, x is the blowing time length of the object to be detected blowing the alcohol detector, e is a natural constant, a and b are preset constants, and a and b are both greater than 0.
Since the S-curve or the growth curve is a common analysis tool in the disciplines of biomedicine, there are many methods in the prior art to fit the S-curve or the growth curve according to the relevant test data to obtain the specific values of a and b, for example, the formula of the correction algorithm may be linearized and then the specific values of a and b may be calculated according to the linear formula using the relevant test data. Meanwhile, there are many kinds of curves similar to K ═ y (1+ b · e) due to the S-type curve or growth curve(-a*x)) Have similar parameter structures, curve types and practical meanings, and can also be used in the present application as a correction algorithm.
Of course, the specific values of a and b may also be empirically determined by the following method and associated data processing, with the specific steps:
step S21, providing an alcohol simulator, generating alcohol gas with standard concentration by using the alcohol simulator, and blowing the alcohol detector for n seconds, wherein n is greater than or equal to 10;
preferably, in some embodiments of the present invention, n-10.
And S22, continuously and rapidly checking and detecting the alcohol detector within n seconds of blowing the alcohol simulator to the alcohol detector to obtain an alcohol response curve, wherein the n second alcohol response value on the alcohol response curve is h.
Step S23, assigning values to a and b, respectively.
Step S24, assigning a and b, K ═ h, x ═ m, and substituting the formula y ═ K/(1+ b × e)(-a*x)) And calculating to obtain the reference value h/(1+ b × e) of the alcohol in the mth second(-a*m)) M is greater than 0 and less than n;
and step S25, comparing the mth second alcohol response value on the alcohol response curve in the step S22 with the mth second alcohol reference value calculated in the step S24, if the difference between the mth second alcohol response value and the mth second alcohol reference value is smaller than a preset difference range, determining that the final values of a and b are respectively equal to the current assignment, otherwise, re-assigning the values of a and b, and returning to the step S24.
The values selected in the above steps S23 and S25 for assigning a and b and reassigning a and b respectively can be determined by data processing personnel through related experience, and the preset difference range can be adjusted as required, and the smaller the difference range, the more the number of assignments required for determining the final values of a and b is, the more accurate the result is.
After a plurality of tests, specific values of a and b are determined, the table 1 is corrected by a correction algorithm, and the obtained result is shown in table 2;
TABLE 2
It is found from table 2 that when the air blowing time is 3 seconds, the deviation between the target investigation result and the active detection result is 1.7%, which is obviously improved compared with the deviation between the preliminary investigation result and the active detection result of 14% in the same air blowing time, and the air blowing time is slightly deteriorated in 4 seconds and 5 seconds, but as a whole, the deviation between the target investigation result and the active detection result is still obviously improved compared with the deviation between the preliminary investigation result and the active detection result.
Meanwhile, in order to further improve the detection accuracy, the invention can also optimize the correction algorithm, and the optimized correction algorithm is as follows:
the preset correction algorithm in step S4 is as follows:
when x < q, K ═ y (1+ b · e)(-a*x))；
When x is more than or equal to q, K is y;
the method comprises the following steps of firstly detecting the alcohol content in an alcohol detector, detecting the alcohol content in the alcohol detector, and then carrying out a target investigation on the alcohol content in the alcohol detector, wherein K is a target investigation detection result, y is a preliminary investigation detection result, x is the air blowing time length of the alcohol detector, e is a natural constant, a and b are preset constants, a and b are both greater than 0, and q is a preset time length threshold value.
Referring to the above test, setting q to be 4, that is, correcting the preliminary investigation detection result with the air blowing time less than 4 seconds (for example, 3 seconds) to obtain the target investigation detection result, but not correcting the preliminary investigation detection result with the air blowing time greater than or equal to 4 seconds, directly taking the preliminary investigation detection result as the target investigation detection result, and at this time, the corrected result is shown in table 3:
TABLE 3
As shown in table 3, in the optimized correction algorithm, when the air blowing time is 3 seconds, the deviation between the target investigation detection result and the active detection result is 1.7%, which is obviously improved compared with 14% of the deviation between the preliminary investigation detection result and the active detection result, and the deviations of the air blowing time of 4 seconds and 5 seconds are not changed, so that the improvement of the overall deviation is better than that in table 2.
Further, the method for correcting the rapid alcohol check detection result further comprises the following steps: and step S5, comparing the active detection result with the target investigation detection result, if the difference between the active detection result and the target investigation detection result exceeds a preset reasonable difference range, judging that the detection is abnormal, otherwise, judging that the detection is normal.
Referring to fig. 2, the present invention provides an alcohol detector, including: the device comprises a detection module 1 and a correction module 2 connected with the detection module 1;
the detection module 1 is used for carrying out active detection and simultaneously carrying out continuous quick investigation detection when a detected object blows air to the alcohol detector, and respectively obtaining an active detection result and a preliminary investigation detection result according to the active detection and the continuous quick investigation detection;
generally, the continuous duration of the continuous and rapid investigation detection is equal to the blowing duration of the tested object blowing the alcohol detector;
and the correction module 2 is used for correcting the preliminary investigation detection result according to a preset correction algorithm to obtain a target investigation detection result.
That is to say, the detection module 1 has an active detection function and a continuous and rapid troubleshooting detection function, and can perform active detection alone, continuous and rapid troubleshooting detection alone, and continuous and rapid troubleshooting detection while performing active detection.
Generally speaking, the air blowing time of the tested object blowing air to the alcohol tester is generally 3-5 seconds.
Further, before the detection module 1 is used for detecting the detected object, the alcohol detector needs to be calibrated, and the calibration specifically includes calibrating the active detection function and calibrating the continuous fast-troubleshooting detection function.
The calibration of the continuous quick-check detection function specifically comprises the following steps:
providing an alcohol gas having a concentration i, i being greater than 0, the alcohol gas being producible by a wet alcohol simulator;
blowing the alcohol gas with the concentration i into the alcohol detector for j seconds, and simultaneously carrying out continuous and rapid investigation detection on the blown alcohol gas by the alcohol detector, wherein j is greater than 0;
when the blowing is finished, the alcohol detector detects that the concentration of the alcohol gas is q through continuous and rapid investigation detection;
and determining the calibration coefficient of the alcohol detector at the time of continuous and quick checking as P, wherein P is q/i.
For example, in some embodiments of the present invention, the calibration of the continuous fast check detection function is specifically: and blowing the 110mg/100ml alcohol gas into the alcohol detector for 4 seconds, and simultaneously carrying out continuous and rapid investigation detection on the blown alcohol gas by the alcohol detector, wherein when the blowing is finished, the concentration of the alcohol gas measured by the alcohol detector at the end of the continuous and rapid investigation detection of the blowing is q mg/100ml, so that the calibration coefficient of the alcohol detector at the time of the continuous and rapid investigation detection is determined to be P, and P is q/110.
Specifically, in combination with the above calibration, the detection module 1 determines the preliminary investigation detection result by: acquiring an alcohol response value f obtained by the alcohol detector through continuous and rapid investigation detection when the air blowing of the object to be detected is finished; and determining a preliminary investigation detection result according to an alcohol response value f and a calibration coefficient P, which are obtained by the alcohol detector through continuous and rapid investigation detection when the air blowing of the object to be detected is finished, wherein the preliminary investigation detection result is equal to f/P.
It should be noted that, in order to determine the correction algorithm for the correction module 2, the present invention tests the continuous and fast checking and detecting function of the alcohol detector.
In one test, the air blowing time during continuous and rapid inspection and calibration is 4 seconds, after calibration, an alcohol simulator is used as a standard alcohol gas generation device, when the concentration of alcohol generated by the alcohol simulator is 115mg/100ml, air is blown into an alcohol detector, one-time active inspection and continuous and rapid inspection and detection are carried out while air is blown, and an active detection result and a preliminary inspection and detection result are respectively obtained after air blowing is finished.
In this test, for reference, when the air blowing time was 10s, the alcohol response curve obtained by the continuous quick check test is shown in fig. 3.
During actual detection, the actual air blowing time of the detected object rarely reaches 10s, and is generally concentrated on 3 to 5s, so in the test, the air blowing time is respectively selected to be 3s, 4s and 5s as investigation points.
In the continuous and rapid investigation test, the alcohol concentration at the moment when the air blowing is finished on the alcohol response curve obtained by the continuous and rapid investigation test is generally used as the preliminary investigation test result of the continuous and rapid investigation test. The blowing time lengths are respectively corresponding to 3s, 4s and 5s, and as shown in fig. 4 to 6, when the blowing time length is 3 seconds, the preliminary investigation detection result is 99mg/100 ml; when the blowing time is 4 seconds, the preliminary investigation detection result is 113mg/100 ml; when the air blowing time is 5 seconds, the preliminary investigation result is 119mg/100 ml.
Generally, the result of the active detection is relatively stable, and in the test, the active detection results obtained by the active detection with the blowing time lengths of 3s, 4s and 5s are all 114mg/100 ml.
The results are summarized in Table 1:
TABLE 1
As shown in table 1, when the air blowing duration is changed during the test, the active detection result is stable and unchanged, the preliminary investigation detection result is greatly different, the difference between the active detection result and the preliminary investigation detection result is also large, and the difference is more obvious when the air blowing duration is shorter.
It should be noted that, the test is performed by using 4 seconds as the calibration blowing time, the calibration blowing time is not fixed, and in some cases, the test may also be performed by using 3 seconds as the calibration blowing time, and at this time, the difference between the preliminary investigation detection result obtained when the blowing time is 5 seconds and the active detection result is greater than that obtained after the calibration is performed by using 4 seconds as the calibration blowing time.
Further tests also show that if the alcohol concentration set on the alcohol simulator is higher, such as 200mg/100ml, the deviation is larger, that is, when other conditions are unchanged, the higher the concentration is, the different blowing time lengths are, the poorer the accuracy of the preliminary investigation detection result is, and the larger the difference between the active detection result and the preliminary investigation detection result is.
Further, through tests on alcohol gases with different concentrations, it is also found that the alcohol concentration on the alcohol response curve of the preliminary investigation result rapidly rises after the beginning of blowing, the speed increase is significantly slowed after about 2 seconds, but will increase all the time, but the trend of the increase is significantly slower, and if a value long enough for the time of the alcohol response curve of the preliminary investigation test result is taken as the final measurement result, the change will be smaller and smaller, for example, if the alcohol concentration 113mg/100ml at the time of the air-blowing time period of 4 seconds is compared with 119mg/100ml at the time of the air-blowing time period of 5 seconds, the difference between the two is not more than-5%, which is a significant improvement over the deviation of-17% as a result of the alcohol concentrations of 99mg/100ml and 119mg/100ml for the preceding 3 seconds and 5 seconds of insufflation.
Further, it was found through experiments that the repeatability and stability of the response of alcohol gas with determined concentration on the instrument are good, and when the air blowing time is long enough, for example, after more than 5 seconds, the alcohol response curve of the preliminary investigation test result is similar to a sigmoid curve (growth curve or Logistic curve), and the rule of the data can be described through sigmoid curve fitting (growth curve fitting or Logistic curve fitting).
It can thus be determined that the preset correction algorithm can be: k ═ y [ (1+ b [ ]) e(-a*x))
And K is a target investigation detection result, y is a preliminary investigation detection result, x is the blowing time length of the object to be detected blowing the alcohol detector, e is a natural constant, a and b are preset constants, and a and b are both greater than 0.
Since the S-curve or the growth curve is a common analysis tool in the disciplines of biomedicine, there are many methods in the prior art to fit the S-curve or the growth curve according to the relevant test data to obtain the specific values of a and b, for example, the formula of the correction algorithm may be linearized and then the specific values of a and b may be calculated according to the linear formula using the relevant test data. Meanwhile, there are many kinds of curves similar to K ═ y (1+ b · e) due to the S-type curve or growth curve(-a*x)) Have similar parameter structures, curve types and practical meanings, and can also be used in the present application as correctionsAnd (4) an algorithm.
Of course, the specific values of a and b may also be empirically determined by the following method and associated data processing, with the specific steps:
step S21, providing an alcohol simulator, generating alcohol gas with standard concentration by using the alcohol simulator, and blowing the alcohol detector for n seconds, wherein n is greater than or equal to 10;
preferably, in some embodiments of the present invention, n-10.
And S22, continuously and rapidly checking and detecting the alcohol detector within n seconds of blowing the alcohol simulator to the alcohol detector to obtain an alcohol response curve, wherein the n second alcohol response value on the alcohol response curve is h.
Step S23, assigning values to a and b, respectively.
Step S24, assigning a and b, K ═ h, x ═ m, and substituting the formula y ═ K/(1+ b × e)(-a*x)) And calculating to obtain the reference value h/(1+ b × e) of the alcohol in the mth second(-a*m)) M is greater than 0 and less than n;
and step S25, comparing the mth second alcohol response value on the alcohol response curve in the step S22 with the mth second alcohol reference value calculated in the step S24, if the difference between the mth second alcohol response value and the mth second alcohol reference value is smaller than a preset difference range, determining that the final values of a and b are respectively equal to the current assignment, otherwise, re-assigning the values of a and b, and returning to the step S24.
The values selected in the above steps S23 and S25 for assigning a and b and reassigning a and b respectively can be determined by data processing personnel through related experience, and the preset difference range can be adjusted as required, and the smaller the difference range, the more the number of assignments required for determining the final values of a and b is, the more accurate the result is.
After a plurality of tests, specific values of a and b are determined, the table 1 is corrected by a correction algorithm, and the obtained result is shown in table 2;
TABLE 2
It is found from table 2 that when the air blowing time is 3 seconds, the deviation between the target investigation result and the active detection result is 1.7%, which is obviously improved compared with the deviation between the preliminary investigation result and the active detection result of 14% in the same air blowing time, and the air blowing time is slightly deteriorated in 4 seconds and 5 seconds, but as a whole, the deviation between the target investigation result and the active detection result is still obviously improved compared with the deviation between the preliminary investigation result and the active detection result.
Meanwhile, in order to further improve the detection accuracy, the invention can also optimize the correction algorithm, and the optimized correction algorithm is as follows:
the preset correction algorithm in step S4 is as follows:
when x < q, K ═ y (1+ b · e)(-a*x))；
When x is more than or equal to q, K is y;
the method comprises the following steps of firstly detecting the alcohol content in an alcohol detector, detecting the alcohol content in the alcohol detector, and then carrying out a target investigation on the alcohol content in the alcohol detector, wherein K is a target investigation detection result, y is a preliminary investigation detection result, x is the air blowing time length of the alcohol detector, e is a natural constant, a and b are preset constants, a and b are both greater than 0, and q is a preset time length threshold value.
Referring to the above test, setting q to be 4, that is, correcting the preliminary investigation detection result with the air blowing time less than 4 seconds (for example, 3 seconds) to obtain the target investigation detection result, but not correcting the preliminary investigation detection result with the air blowing time greater than or equal to 4 seconds, directly taking the preliminary investigation detection result as the target investigation detection result, and at this time, the corrected result is shown in table 3:
TABLE 3
As shown in table 3, in the optimized correction algorithm, when the air blowing time is 3 seconds, the deviation between the target investigation detection result and the active detection result is 1.7%, which is obviously improved compared with 14% of the deviation between the preliminary investigation detection result and the active detection result, and the deviations of the air blowing time of 4 seconds and 5 seconds are not changed, so that the improvement of the overall deviation is better than that in table 2.
Further, the alcohol detector also comprises a comparison module 3 connected with the detection module 1 and the correction module 2;
the comparison module 3 is used for comparing the active detection result with the target investigation detection result, if the difference between the active detection result and the target investigation detection result exceeds a preset reasonable difference range, the detection is judged to be abnormal, otherwise, the detection is judged to be normal.
In summary, the invention provides a correction method for quickly checking an alcohol detection result, which comprises the following steps: step S1, providing an alcohol detector; s2, blowing air to the alcohol detector by the object to be detected, and carrying out active detection and continuous and rapid investigation detection by the alcohol detector; step S3, the alcohol detector respectively determines an active detection result and a preliminary investigation detection result according to the active detection and the continuous quick investigation detection; and S4, correcting the preliminary investigation detection result according to a preset correction algorithm to obtain a target investigation detection result, and correcting the preliminary investigation detection result through the preset correction algorithm, so that the accuracy of continuous and rapid investigation detection can be improved, and the active alcohol detection effect can be improved. The invention also provides an alcohol detector which can improve the accuracy of active detection.
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 (10)
1. A correction method for a rapid troubleshooting alcohol detection result is characterized by comprising the following steps:
step S1, providing an alcohol detector;
s2, blowing air to the alcohol detector by the object to be detected, and carrying out active detection and continuous and rapid investigation detection by the alcohol detector;
step S3, the alcohol detector respectively determines an active detection result and a preliminary investigation detection result according to the active detection and the continuous quick investigation detection;
and step S4, correcting the preliminary investigation detection result according to a preset correction algorithm to obtain a target investigation detection result.
2. The method for correcting fast alcohol testing results according to claim 1, wherein the correction algorithm preset in step S4 is:
K＝y*(1+b*e(-a*x))
and K is a target investigation detection result, y is a preliminary investigation detection result, x is the blowing time length of the object to be detected blowing the alcohol detector, e is a natural constant, a and b are preset constants, and a and b are both greater than 0.
3. The method for correcting fast alcohol testing results according to claim 1, wherein the correction algorithm preset in step S4 is:
when x < q, K ═ y (1+ b · e)(-a*x))；
When x is more than or equal to q, K is y;
the method comprises the following steps of firstly detecting the alcohol content in an alcohol detector, detecting the alcohol content in the alcohol detector, and then carrying out a target investigation on the alcohol content in the alcohol detector, wherein K is a target investigation detection result, y is a preliminary investigation detection result, x is the air blowing time length of the alcohol detector, e is a natural constant, a and b are preset constants, a and b are both greater than 0, and q is a preset time length threshold value.
4. The method for correcting the fast alcohol inspection result according to claim 1, further comprising the following steps between the step S1 and the step S2:
providing alcohol gas, wherein the concentration of the alcohol gas is i, and i is greater than 0;
blowing the alcohol gas with the concentration i into the alcohol detector for j seconds, and simultaneously carrying out continuous and rapid investigation detection on the blown alcohol gas by the alcohol detector, wherein j is greater than 0;
when the blowing is finished, the alcohol detector detects that the concentration of the alcohol gas is q through continuous and rapid investigation detection;
determining a calibration coefficient of the alcohol detector during continuous and rapid checking and detection as P, wherein P is q/i;
the step of determining the preliminary examination detection result in step S3 includes:
acquiring an alcohol response value f obtained by the alcohol detector through continuous and rapid investigation detection when the air blowing is finished in the step S2;
and determining a preliminary investigation detection result according to an alcohol response value f and a calibration coefficient P, which are obtained by the alcohol detector through continuous and rapid investigation detection when the air blowing is finished in the step S2, wherein the preliminary investigation detection result is equal to f/P.
5. The method for correcting the result of rapid alcohol test according to claim 2 or 3, wherein the specific values of a and b are set according to the following steps:
step S21, providing an alcohol simulator, generating alcohol gas by using the alcohol simulator, and blowing the alcohol detector for n seconds, wherein n is greater than or equal to 10;
s22, continuously and rapidly checking and detecting the alcohol detector within n seconds of blowing the alcohol simulator to the alcohol detector to obtain an alcohol response curve, wherein the n second alcohol response value on the alcohol response curve is h;
step S23, assigning values to a and b respectively;
step S24, assigning a and b, K ═ h, x ═ m, and substituting the formula y ═ K/(1+ b × e)(-a*x)) And calculating to obtain the reference value h/(1+ b × e) of the alcohol in the mth second(-a*m)) M is greater than 0 and less than n;
and step S25, comparing the mth second alcohol response value on the alcohol response curve in the step S22 with the mth second alcohol reference value calculated in the step S24, if the difference between the mth second alcohol response value and the mth second alcohol reference value is smaller than a preset difference range, determining that the final values of a and b are respectively equal to the current assignment, otherwise, re-assigning the values of a and b, and returning to the step S24.
6. The method for correcting the result of rapid alcohol testing according to claim 1, further comprising: and step S5, comparing the active detection result with the target investigation detection result, if the difference between the active detection result and the target investigation detection result exceeds a preset reasonable difference range, judging that the detection is abnormal, otherwise, judging that the detection is normal.
7. An alcohol detector, comprising: the device comprises a detection module (1) and a correction module (2) connected with the detection module (1);
the detection module (1) is used for carrying out active detection and simultaneously carrying out continuous quick investigation detection when a detected object blows air to the alcohol detector, and respectively obtaining an active detection result and a preliminary investigation detection result according to the active detection and the continuous quick investigation detection;
and the correction module (2) is used for correcting the preliminary investigation detection result according to a preset correction algorithm to obtain a target investigation detection result.
8. The alcohol detector of claim 7, wherein the predetermined correction algorithm is:
K＝y*(1+b*e(-a*x))
the method comprises the following steps of detecting the alcohol content in the alcohol detector, wherein K is a target investigation detection result, y is a preliminary investigation detection result, x is the blowing time length of blowing air to the alcohol detector, e is a natural constant, a and b are preset constants, and a and b are both larger than 0.
9. The alcohol detector of claim 7, wherein the predetermined correction algorithm is:
when x < q, K ═ y (1+ b · e)(-a*x))；
When x is more than or equal to q, K is y;
the method comprises the following steps of detecting the alcohol content in the alcohol detector, wherein K is a target investigation detection result, y is a preliminary investigation detection result, x is the blowing time length of blowing air to the alcohol detector, e is a natural constant, a and b are preset constants, a and b are both larger than 0, and q is a preset time length threshold value.
10. The alcohol detector according to claim 7, further comprising a comparison module (3) connected to the detection module (1) and the correction module (2);
the comparison module (3) is used for comparing the active detection result with the target investigation detection result, if the difference between the active detection result and the target investigation detection result exceeds a preset reasonable difference interval, the detection is judged to be abnormal, otherwise, the detection is judged to be normal.
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