CN114035416A - Method for measuring and calibrating emergency time of detector of fire-fighting emergency lighting lamp - Google Patents
Method for measuring and calibrating emergency time of detector of fire-fighting emergency lighting lamp Download PDFInfo
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Abstract
The invention discloses a method for measuring and calibrating emergency time of a detector of a fire-fighting emergency lighting lamp. Calibrating the emergency switching time of the detector, comprising the following steps: one end of the timing starting circuit is connected with a starting switch (a solid-state relay), and when the power is suddenly cut off, the charging mode is switched to a discharging mode by utilizing the switch response speed characteristic of the solid-state relay, a charging current loop is zero, a timing starting circuit is triggered, and a starting signal is started; the second step is that: the other end of the fire-fighting emergency lighting lamp detector is connected with a photoelectric sensor, when an emergency lamp is instantly turned on, the circuit is in a discharge mode, a timing ending circuit is triggered, and a stop signal is started; the measurement calibration work of the emergency conversion time and the emergency working time is completed, the measurement calibration method of the emergency time of the fire-fighting emergency lighting lamp detector is achieved, the measurement accuracy and the resolution of the calibration device are improved, the minimum resolution is 10ns, and the method is worthy of popularization.
Description
Technical Field
The invention belongs to the technical field of fire-fighting emergency lamp detection, and particularly relates to a method for measuring and calibrating the emergency time of a fire-fighting emergency lighting lamp detector.
Background
In the fire emergency light industry, whether detect fire emergency light and say and satisfy the requirement, the emergent switching time of fire emergency light and say that emergent operating time is an important examination project, and the problem that prior art exists is: the accuracy of the existing metering instrument is deficient, most of the existing metering instruments are limited to millisecond level, and the emergency switching time and the emergency working time cannot be measured with higher accuracy.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for measuring and calibrating the emergency time of a detector of a fire-fighting emergency lighting lamp, which has the advantage of high measurement accuracy and solves the problems that the accuracy of the existing detector is poor, most of the existing detectors are limited to millisecond level, and the emergency conversion time and the emergency working time cannot be measured with higher accuracy.
The invention is realized in this way, a method for measuring and calibrating the emergency time of a detector of a fire-fighting emergency lighting lamp comprises the following steps:
1. a method for measuring and calibrating the emergency time of a detector of a fire-fighting emergency lighting lamp comprises the following steps:
the first step is as follows: calibrating the emergency conversion time of the detector, connecting one end of the detector of the fire-fighting emergency lighting lamp with a starting switch (a solid-state relay), and triggering a timing starting circuit to start a starting signal when the circuit is suddenly powered off by utilizing the switch response speed characteristic of the solid-state relay and the charging current loop is zero;
the second step is that: the other end of the fire-fighting emergency lighting lamp detector is connected with a photoelectric sensor, when an emergency lamp is instantly turned on, the circuit is in a discharge mode, a timing ending circuit is triggered, and a stop signal is started;
the third step: calibrating the emergency working time of the detector, connecting one end of the detector of the fire-fighting emergency lighting lamp with a photoelectric sensor, and triggering a timing starting circuit to start a starting signal when an emergency lamp is instantly on in a discharging mode;
the fourth step: the other end of the fire-fighting emergency lighting lamp detector is connected with the solid-state relay, when the set time is reached, the voltage of the charging loop is switched on, the circuit is in a charging mode, and when the charging current reaches a constant value, the timing ending circuit is triggered to start a stop signal.
The fifth step: when the time interval measuring instrument is used for calibration, the time interval measuring instrument selects a corresponding function, starts a test, waits for signal triggering and starts timing;
and a sixth step: calculating the error of the emergency switching time, the displayed value tiThat is, the actual value of the emergency switching time is obtained, t is an expected value, the line connection mode is kept unchanged, the measurement is continuously carried out for 3 times, the interval time between every two measurements is more than 2min, and the error of the emergency switching time is calculated according to the following formula:
the seventh step: calibrating the emergency working time of the detector, connecting one end of the detector with a photoelectric sensor, triggering a timing starting circuit when an emergency lamp is instantly on to start a starting signal when a circuit is in a discharging mode;
eighth step: the other end is connected with a solid relay, when the set time is reached, the voltage of a charging loop is switched on, the circuit is in a charging mode, and when the charging current reaches constant, a timing ending circuit is triggered to start a stop signal;
the ninth step: calculating the error of the emergency working time, the displayed value tiThe actual value of the emergency working time is obtained, t is a set value, the set time is kept unchanged, the measurement is continuously carried out for 3 times, the interval time between every two measurements is more than 2min, and the delay setting error is calculated according to the following formula:
the tenth step: and detecting the comparison measurement result according to a formula and calibrating the fire-fighting emergency lighting lamp detector with the error of the measurement result.
2. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: the calibration method of the emergency switching time refers to the verification procedure of a JJG238-2018 time interval measuring instrument.
3. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: the calibration method of the emergency working time refers to JJF1282-2011 electronic time relay calibration specifications.
4. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: the measuring environment is adjusted as follows:
(1) ambient temperature: (23 + -5) deg.C;
(2) relative humidity: less than or equal to 75 percent;
(3) power supply voltage: (220 ± 22) V, frequency: (50. + -. 0.5) Hz;
(4) the surrounding does not have electromagnetic interference which influences normal operation.
5. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: before the calibration indicating value error, the calibration standard equipment and the calibrated fire emergency lighting lamp detector are started to preheat according to the requirements of respective specifications, and when no requirement exists, the starting preheating time is not less than 30 min.
6. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: the measurement range of the emergency switching time is as follows: 1ms to 100s, and the measurement uncertainty (k 2) is: u is 1.2 ms.
7. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: the measurement range of the emergency working time is as follows: 1 min-120 min, and the measurement uncertainty (k is 2) is as follows: u is 0.2s to 0.6 s.
8. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: when the measured value (the average value of each measurement result) is within the upper limit and the lower limit of the checking control, the standard appliance passes the checking period and meets the requirement.
Compared with the prior art, the invention has the following beneficial effects:
according to the method, the single-chip microcomputer control system controls the power supply, the solid-state relay, the current control circuit, the photoelectric conversion circuit, the signal conditioning circuit and the timing acquisition system, so that the measurement and calibration work of emergency conversion time and emergency working time is completed, the measurement and calibration of the emergency time of the fire-fighting emergency lighting lamp detector is realized, the measurement and calibration accuracy is greatly improved, the measurement resolution of the emergency conversion time is improved, the minimum resolution is 10ns, and the measurement and calibration method of the emergency conversion time and the emergency working time of the system is worthy of popularization.
Drawings
FIG. 1 is a schematic diagram of an emergency transition time calibration provided by an embodiment of the invention;
fig. 2 is a schematic diagram of emergency operation time calibration provided in the embodiment of the present invention.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
The structure of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 2, the method for measuring and calibrating the emergency time of the detector of the fire emergency lighting lamp provided by the embodiment of the invention comprises the following steps:
the first step is as follows: calibrating the emergency conversion time of the detector, connecting one end of the detector of the fire-fighting emergency lighting lamp with a starting switch (a solid-state relay), and triggering a timing starting circuit to start a starting signal when the circuit is suddenly powered off by utilizing the switch response speed characteristic of the solid-state relay and the charging current loop is zero;
the second step is that: the other end of the fire-fighting emergency lighting lamp detector is connected with a photoelectric sensor, when an emergency lamp is instantly turned on, the circuit is in a discharge mode, a timing ending circuit is triggered, and a stop signal is started;
the third step: calibrating the emergency working time of the detector, connecting one end of the detector of the fire-fighting emergency lighting lamp with a photoelectric sensor, and triggering a timing starting circuit to start a starting signal when an emergency lamp is instantly on in a discharging mode;
the fourth step: the other end of the fire-fighting emergency lighting lamp detector is connected with the solid-state relay, when the set time is reached, the voltage of the charging loop is switched on, the circuit is in a charging mode, and when the charging current reaches a constant value, the timing ending circuit is triggered to start a stop signal.
The fifth step: when the time interval measuring instrument is used for calibration, the time interval measuring instrument selects a corresponding function, starts a test, waits for signal triggering and starts timing;
and a sixth step: calculating the error of the emergency switching time, the displayed value tiI.e. the actual value of the emergency switching time, t is the expectationAnd (3) continuously measuring for 3 times while keeping the line connection mode unchanged, wherein the interval time between every two measurements is more than 2min, and calculating the error of the emergency switching time according to the following formula:
the seventh step: calibrating the emergency working time of the detector, connecting one end of the detector with a photoelectric sensor, triggering a timing starting circuit when an emergency lamp is instantly on to start a starting signal when a circuit is in a discharging mode;
eighth step: the other end is connected with a solid relay, when the set time is reached, the voltage of a charging loop is switched on, the circuit is in a charging mode, and when the charging current reaches constant, a timing ending circuit is triggered to start a stop signal;
the ninth step: calculating the error of the emergency working time, the displayed value tiThe actual value of the emergency working time is obtained, t is a set value, the set time is kept unchanged, the measurement is continuously carried out for 3 times, the interval time between every two measurements is more than 2min, and the delay setting error is calculated according to the following formula:
the tenth step: and detecting the comparison measurement result according to a formula and calibrating the fire-fighting emergency lighting lamp detector with the error of the measurement result.
Referring to fig. 1 and 2, the calibration method for emergency transfer time refers to the jjjg 238-2018 time interval meter verification procedure.
Referring to fig. 1 and fig. 2, the calibration method of emergency working time refers to JJF1282-2011 electronic time relay calibration specification.
Referring to fig. 1, the calibration method of the emergency switching time refers to the verification procedure of the JJG238-2018 time interval measuring instrument, and the measurement range of the emergency switching time is as follows: 1ms to 100s, and the measurement uncertainty (k 2) is: u is 1.2 ms.
Referring to fig. 2, the method for calibrating emergency operating time refers to the JJF1282-2011 electronic time relay calibration specification, and the measurement range of the operating time is as follows: 1 min-120 min, and the measurement uncertainty (k is 2) is as follows: u is 0.2s to 0.6 s.
Referring to fig. 1 and 2, the measurement environment is adjusted to:
(1) ambient temperature: (23 + -5) deg.C;
(2) relative humidity: less than or equal to 75 percent;
(3) power supply voltage: (220 ± 22) V, frequency: (50. + -. 0.5) Hz;
(4) the surrounding does not have electromagnetic interference which influences normal operation.
Referring to fig. 1 and 2, before the indication error is calibrated, the calibration standard device and the calibrated fire emergency lighting lamp detector should be started and preheated according to the requirements of their respective specifications, and when there is no requirement, the startup preheating time is not less than 30 min.
Referring to fig. 1, the measurement range of the emergency switching time is: 1ms to 100s, and the measurement uncertainty (k 2) is: u is 1.2 ms.
Referring to fig. 2, the measurement range of the emergency operation time is: 1 min-120 min, and the measurement uncertainty (k is 2) is as follows: u is 0.2s to 0.6 s.
Referring to fig. 1 and 2, when the measured values (average value of each measurement) are within the upper and lower limits of the check control, the standard appliance passes the check period and is qualified.
Emergency transfer time measurement uncertainty assessment
1 measurement method
One end of the charging current loop is connected with a starting switch (a solid-state relay), and by utilizing the switch response speed characteristic of the solid-state relay, when the power is cut off suddenly, the charging current loop is zero, the timing starting circuit is triggered, and a starting signal is started; the other end is connected with a photoelectric sensorWhen the emergency lamp is instantly on, the circuit is in a discharge mode, the timing ending circuit is triggered, the stop signal is started, and the value t displayed by the time interval measuring instrumentiThat is, the actual value of the emergency switching time is measured continuously for 3 times, the time interval between each measurement should be greater than 2min, and the calculation is performed according to the following formula:
in the formula: Δ t — measurement error, s;
t is system switching time, s;
2 mathematical model
Tx＝T0+Δ
In the formula: t isx-test time of the calibrated tester;
T0-time interval measurement meter test time;
delta-the difference between the calibrated detector and the time interval measuring instrument;
2 major sources of uncertainty
2.1 Standard uncertainty component u introduced by measurement error of time Interval measuring Instrument1
2.2 measurement of the Standard uncertainty component u introduced by repeatability2
2.3 Standard uncertainty component u introduced by the sensitivity of the photosensor3
2.4 Standard uncertainty component u introduced by asynchronous relay contact switch4
3 Standard uncertainty assessment
3.1 Standard uncertainty introduced by measurement error of time Interval measuring Instrument
Known from the technical indexes of the time interval measuring instrument, the maximum allowable error of the time interval measuring instrument is 0.1 mu s, the time interval measuring instrument is processed according to even distribution,
then the standard uncertainty:
3.2 measurement of Standard uncertainty introduced by repeatability
Using a time interval measuring instrument (time interval measuring instrument) to perform 10 repeated measurements corresponding to the fast conversion time, wherein the data respectively are as follows: 0.0271, 0.0269, 0.0274, 0.0267, 0.0273, 0.0275, the experimental standard deviation s (t) and the experimental standard deviation of the mean value were calculated according to the Bessel formula
Then the standard uncertainty:
u2＝0.178ms
3.3 Standard uncertainty introduced by the sensitivity of the photosensor
According to the response time of the phototriode, the maximum allowable error introduced by the optical sensor is known to be not more than 5 mus, the processing is carried out according to uniform distribution,
then the standard uncertainty:
3.4 Standard uncertainty introduced by asynchronous relay contact switch
According to the using specification of the relay, the response time of the switch contact of the relay is not more than 1ms, the standard uncertainty:
4 synthetic standard uncertainty
The above standard uncertainty components are uncorrelated, so the composite standard uncertainty is:
5 extended uncertainty
Take k as 2 and U as kuc＝1.2ms
Within the measuring range of 1 ms-100 s, the source of the automatic detection system for the emergency lamp is evaluated to be the same, and the uncertainty of the expansion of the emergency conversion time is
U＝1.2ms；
Emergency operating time measurement uncertainty assessment
1 measurement method
Calibrating the emergency working time of the system, wherein one end of the system is connected with a photoelectric sensor, and when an emergency lamp is instantly turned on, the circuit is in a discharge mode, a timing starting circuit is triggered, and a starting signal is started; the other end is connected with a solid relay, when the expected time is up, the voltage of a charging loop is switched on, the circuit is in a charging mode, when the charging current reaches constant, the timing ending circuit is triggered, a stop signal is started, and the displayed value t isiNamely, the actual value of the emergency working time is kept unchanged, the measurement is continuously carried out for 3 times, the interval time between each measurement is more than 2min, and the working emergency time error is calculated according to the following formula:
in the formula: Δ t-work emergency time error, s;
t is a working emergency time set value, s;
2 mathematical model
Tx＝T0+Δ
In the formula: t isx-set time of the checked meter;
T0-time interval measurement meter test time;
delta-the difference between the test time of the calibrated tester and the test time of the time interval tester;
3 major sources of uncertainty
3.1 Standard uncertainty component u introduced by measurement error of time Interval measuring Instrument1
3.2 measurement of the Standard uncertainty component u introduced by repeatability2
3.3 Standard uncertainty component u introduced by asynchronous relay contact switch3
4 Standard uncertainty assessment
4.1 Standard uncertainty introduced by measurement error of time Interval measuring Instrument
(1) Standard uncertainty component u introduced by maximum allowable error of time interval measuring instrument11
The maximum allowable error of the time interval measuring instrument for measuring the time interval is as follows: 5X 10-5Reading +1 words, processing according to uniform distribution,
the standard uncertainty is then:
1min：
120min：
(2) time interval measuring instrument resolution induced uncertainty componentu12
The resolution of time interval measuring instrument is 0.1s at 1min and 120min, the half width is 0.005s, and the treatment is carried out according to uniform distribution,
the uncertainty component is then:
(3) standard uncertainty u introduced by measurement error of time interval measuring instrument1
1min：
120min：
4.2 measurement of Standard uncertainty introduced by repeatability
The repetitive measurement is respectively carried out on the 1min point and the 120min point set by the time relay, and the measurement data are respectively as follows (unit: s): 60.01, 60.03, 60.02, 60.04, 60.05, 60.02, 60.03;
7200.2、7200.2、7200.3、7200.4、7200.1、7200.3、7200.2、7200.4、7200.2、7200.1；
calculating an experimental standard deviation s (t), namely a class A uncertainty, according to a Bessel formula:
1min：u2＝0.013s
120min：u2＝0.11s
4.3 Standard uncertainty introduced by asynchronous relay contact switch
According to the using specification of the time relay, the response time of a switch contact of the time relay is not more than 1ms, and then the standard uncertainty:
5 synthetic Standard uncertainty
The above standard uncertainty components are uncorrelated, so the composite standard uncertainty is:
1min：
120min：
6 extended uncertainty
Taking k as 2, expanding uncertainty:
1min：U＝kuc＝0.2s
120min：U＝kuc＝0.6s
within the measuring range of 1-120 min, the source of the emergency working time is the same, and the expansion uncertainty U of the emergency working time is 0.2-0.6 s
In summary, the following steps: according to the method for metering and calibrating the emergency time, the power supply, the solid-state relay, the current control circuit, the photoelectric conversion circuit, the signal conditioning circuit and the timing acquisition system are controlled through the single-chip microcomputer control system, so that the metering and calibrating work of the emergency conversion time and the emergency working time is completed, the metering and calibrating work of the emergency time of the fire-fighting emergency lighting lamp detector is solved, the calibrating accuracy is greatly improved, the measuring resolution of the emergency conversion time is improved, the minimum resolution is 10ns, and the method for metering and calibrating the emergency conversion time and the emergency working time of the system is worthy of popularization.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A method for measuring and calibrating the emergency time of a detector of a fire-fighting emergency lighting lamp is characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: calibrating the emergency conversion time of the detector, connecting one end of the detector of the fire-fighting emergency lighting lamp with a starting switch (a solid-state relay), and triggering a timing starting circuit to start a starting signal when the circuit is suddenly powered off by utilizing the switch response speed characteristic of the solid-state relay and the charging current loop is zero;
the second step is that: the other end of the fire-fighting emergency lighting lamp detector is connected with a photoelectric sensor, when an emergency lamp is instantly turned on, the circuit is in a discharge mode, a timing ending circuit is triggered, and a stop signal is started;
the third step: calibrating the emergency working time of the detector, connecting one end of the detector of the fire-fighting emergency lighting lamp with a photoelectric sensor, and triggering a timing starting circuit to start a starting signal when an emergency lamp is instantly on in a discharging mode;
the fourth step: the other end of the fire-fighting emergency lighting lamp detector is connected with a solid-state relay, when the set time is reached, the voltage of a charging loop is switched on, the circuit is in a charging mode, and when the charging current reaches constant, a timing ending circuit is triggered to start a stop signal;
the fifth step: when the time interval measuring instrument is used for calibration, the time interval measuring instrument selects a corresponding function, starts a test, waits for signal triggering and starts timing;
and a sixth step: calculating the error of the emergency switching time, the displayed value tiThat is, the actual value of the emergency switching time is obtained, t is an expected value, the line connection mode is kept unchanged, the measurement is continuously carried out for 3 times, the interval time between every two measurements is more than 2min, and the error of the emergency switching time is calculated according to the following formula:
the seventh step: calibrating the emergency working time of the detector, connecting one end of the detector with a photoelectric sensor, triggering a timing starting circuit when an emergency lamp is instantly on to start a starting signal when a circuit is in a discharging mode;
eighth step: the other end is connected with a solid relay, when the set time is reached, the voltage of a charging loop is switched on, the circuit is in a charging mode, and when the charging current reaches constant, a timing ending circuit is triggered to start a stop signal;
the ninth step: calculating the error of the emergency working time, the displayed value tiThe actual value of the emergency working time is obtained, t is a set value, the set time is kept unchanged, the measurement is continuously carried out for 3 times, the interval time between every two measurements is more than 2min, and the delay setting error is calculated according to the following formula:
the tenth step: and detecting the comparison measurement result according to a formula and calibrating the fire-fighting emergency lighting lamp detector with the error of the measurement result.
2. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: the calibration method of the emergency switching time refers to the verification procedure of a JJG238-2018 time interval measuring instrument.
3. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: the calibration method of the emergency working time refers to JJF1282-2011 electronic time relay calibration specifications.
4. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: the measuring environment is adjusted as follows:
(1) ambient temperature: (23 + -5) deg.C;
(2) relative humidity: less than or equal to 75 percent;
(3) power supply voltage: (220 ± 22) V, frequency: (50. + -. 0.5) Hz;
(4) the surrounding does not have electromagnetic interference which influences normal operation.
5. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: before the calibration indicating value error, the standard equipment for calibration and the fire-fighting emergency lighting lamp detector to be calibrated should be started and preheated according to the requirements of respective specifications, and when no requirement exists, the starting and preheating time is not less than 30 min.
6. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: the measurement range of the emergency switching time is as follows: 1ms to 100s, and the measurement uncertainty (k 2) is: u is 1.2 ms.
7. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: the measurement range of the emergency working time is as follows: 1 min-120 min, and the measurement uncertainty (k is 2) is as follows: u is 0.2s to 0.6 s.
8. The method for measuring and calibrating the emergency time of the fire emergency lighting lamp detector as claimed in claim 1, wherein the method comprises the following steps: when the measured value (the average value of each measurement result) is within the upper limit and the lower limit of the checking control, the standard appliance passes the checking period and meets the requirement.
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