CN111521295A - Mobile thermometer calibration vehicle and application thereof - Google Patents
Mobile thermometer calibration vehicle and application thereof Download PDFInfo
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- CN111521295A CN111521295A CN202010233243.5A CN202010233243A CN111521295A CN 111521295 A CN111521295 A CN 111521295A CN 202010233243 A CN202010233243 A CN 202010233243A CN 111521295 A CN111521295 A CN 111521295A
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Abstract
The invention discloses a mobile thermometer calibration vehicle and application thereof, wherein the calibration vehicle is provided with an enhanced illumination system and an AI intelligent temperature control system, the enhanced illumination system is used for providing compartment illumination in the calibration vehicle, the AI intelligent temperature control system can ensure the temperature control performance and ventilation effect in the calibration vehicle, so that the interior of the calibration vehicle can reach the standard of constant temperature and humidity, the standard of constant temperature and humidity is (18-28) DEG C, and the relative humidity is (30-70)% RH; a power system is further arranged in the calibration trolley and comprises a voltage-stabilized power supply and an inverter, and the voltage-stabilized power supply is used for providing stable 220V alternating current and 110V alternating current and 12V direct current; the power system is connected with the central control system and provides power for the central control system, and the power system provides power by adopting various power sources.
Description
Technical Field
The invention relates to the technical field of electricity, in particular to a mobile thermometer calibration vehicle and application thereof.
Background
The thermometer described in the present application is a broad-sense thermometer, i.e., a device for measuring body temperature, including but not limited to a forehead thermometer, an infrared ear thermometer;
in order to isolate the source of disease and prevent diffusion, body temperature detection becomes an initial screening method for separating suspected patients, and is also a first pass for prevention and control of new coronary pneumonia epidemic situations, and a thermometer plays an important role in screening suspected patients in public places. The infrared ear thermometer and forehead thermometer are used for detecting the body temperature of a human body in places such as airports, stations, subway stations, communities, supermarkets, card setting inspection intersections and the like, whether the detected temperature is accurate or not is determined, and the direct effect of epidemic prevention and control is determined. The quality of the products of the ear thermometer and the forehead thermometer is mixed, most of the products are not measured and calibrated, and the improper use causes the temperature measurement data to be unstable and unreliable, thereby causing misjudgment and missed judgment, and easily leading some checkpoints to become a decoration.
The blackbody infrared radiation source is used as a basic instrument for infrared test and calibration, outgoing radiation can be filled with a view field, calibration and measurement are convenient, measurement and calibration accuracy can be improved, the demand is very large, and the blackbody infrared radiation source has a wide application prospect. The black body infrared radiation source utilizes a platinum resistor temperature sensor to control and measure the temperature of a radiation surface, amplifies the voltage of a platinum resistor measured by an unbalanced bridge along with the temperature change, inputs the amplified voltage into an analog/digital (A/D) converter, measures the temperature by measuring the resistance value by utilizing the functional relation between the resistor and the temperature, and finally performs operation and processing in a single chip microcomputer. The platinum resistance temperature sensor has the characteristics of stable performance, good repeatability, high accuracy, large temperature measurement range and the like, so that the current commercial blackbody infrared radiation source at home and abroad only marks the precision of the platinum resistance temperature sensor on the index of the temperature accuracy, wherein the platinum resistance temperature accuracy is determined according to the grade of the adopted platinum resistance. However, because a non-linear relationship exists between the resistance value and the temperature of the platinum resistor, especially in a high-temperature section, and the influence of the system error of resistance measurement, the lead wire, the ambient temperature and the like also can influence the overall temperature measurement precision of the blackbody radiation source system, the limitation of the blackbody radiation source in the field of calibration of the mobile thermometer is limited, and especially the integration and the synergy of the blackbody radiation source and other calibration devices are limited.
The instrument for measuring the temperature of the human body mainly comprises a contact type instrument and a non-contact type instrument. The contact type is as follows: glass thermometers (mercury thermometers), medical electronic thermometers, and the like; the non-contact type is as follows: infrared ear thermometer, infrared forehead thermometer, infrared screening instrument, etc. Contact thermometers are higher than non-contact thermometers in terms of measurement accuracy. The accuracy sequence of the non-contact thermometers is: the infrared ear thermometer is larger than the infrared forehead thermometer and the infrared screening instrument. The infrared forehead thermometer has the advantages of convenience in use, no contact and high efficiency, and has the defects that the infrared forehead thermometer is influenced by individual differences, measurement environments, instrument setting, an operation method and the like, the measurement result can be inaccurate, and people can pay attention to the correct use:
1. the specification is read carefully and the operation is required according to the specification. The infrared forehead thermometer generally has two modes of a body temperature mode and a surface temperature mode, and the body temperature mode is selected. If the "surface temperature mode" is selected, it is likely that body temperatures around 33 ℃ and 34 ℃ will be measured.
2. The measuring position is in the forehead center (the center of the forehead above the eyebrow center) of the human body, the measuring position is vertical during measurement, the distance between the detecting head and the forehead is generally (1-5) cm, and if the detecting head is tightly attached to the forehead, the measurement cannot be accurately performed. There should be no hair on the forehead, and if sweat exists, it should be wiped dry.
3. The working environment of the infrared forehead thermometer is generally required to be 16-35 ℃, so that the forehead thermometer is placed at the temperature for about fifteen minutes before use until the operating requirement is met.
4. The shell of the forehead thermometer at the non-handle part is not touched by hands.
5. If the temperature difference between the indoor and the outdoor is large, the person entering the indoor test should wait for 5-10 minutes indoors for re-measurement under the condition that the conditions allow. The measuring device is far away from the air outlet of the air conditioner and other places.
6. If the measurement is carried out outdoors at low temperature, two 'non-standard methods' (special conditions, careful adoption) are referred to: 6.1, the infrared forehead thermometer should have proper heat preservation measures (such as a heat preservation box and the like). And the emergency treatment can be carried out by using heat preservation measures such as hand warmers, hot water bags, warmers and the like due to insufficient field conditions. For example, a warmer with a low temperature is attached to the outer side of the infrared forehead thermometer to help the forehead thermometer to keep the temperature, and the warmer is paid attention to be replaced in time. Other methods of maintaining the temperature of the forehead thermometer are also contemplated. And 6.2, measuring the body temperature of a healthy person (such as the person or a colleague) by using the medical electronic thermometer (or the glass thermometer) and the infrared forehead thermometer, wherein the corrected value is the indication value of the medical electronic thermometer (or the glass thermometer) -the indication value of the infrared forehead thermometer. When the infrared forehead thermometer is used for measurement, the measured value and the corrected value are the body temperature of the person to be measured. If a significant increase above normal body temperature occurs, two or three measurements should be taken. If abnormal body temperature is found in three times of measurement, the medical electronic thermometer or the glass thermometer is recommended to be used for measuring and confirming again.
7. If the outdoor environment changes greatly, the correction value is determined again according to the change in comparison measurement.
8. After the medical electronic thermometer and the glass thermometer are used, alcohol is required to be used for disinfection, so that cross infection is avoided.
In actual work, the operability of the thermometer for censorship of each checkpoint is not high, especially, the manpower and waiting time of a front-line worker are not wasted as much as possible in the nervous prevention and control work, and the thermometer needs to be actively checked as a metering worker who cannot perform the censorship such as sitting, so that a movable detection vehicle for calibrating the thermometer is urgently needed to be designed to solve the problems, and a more powerful guarantee is provided for the epidemic prevention and control fighting.
Disclosure of Invention
To the deficiencies in the prior art, the present application aims to provide a mobile thermometer calibration cart and an application thereof, and the specific scheme is as follows:
a calibration vehicle for a mobile thermometer is provided with an enhanced illumination system and an AI intelligent temperature control system, wherein the enhanced illumination system is used for providing compartment illumination in the calibration vehicle, the AI intelligent temperature control system can ensure the temperature control performance and the ventilation effect in the calibration vehicle, so that the calibration vehicle can reach the standard of constant temperature and humidity, the standard of constant temperature and humidity is (18-28) DEG C, and the relative humidity is (30-70)% RH; a power system is further arranged in the calibration trolley, and the power system comprises a voltage-stabilized power supply and an inverter and is used for providing stable 220V alternating current and 110V alternating current and 12V direct current; the power system is connected with the central control system and provides power for the central control system, the power system adopts various power sources to provide power, the power sources comprise solar energy, gasoline, electric energy or hydrogen energy, and the solar panel is arranged on the roof of the vehicle; the calibration vehicle is also provided with a water tank and a water purification bucket, and the water purification bucket is communicated with the outside of the vehicle body and used for maintaining the quality of air in the vehicle; the calibration vehicle is also internally provided with a metering management system which is connected with a laboratory information management system of the detection calibration center through a wifi base station in the vehicle, so that the functions of digital acquisition of metering detection, electronic original record making and certificate generation by one key can be realized; the calibration vehicle is further provided with a blackbody radiation source (1) and a constant temperature bath (2).
The blackbody radiation source is a standard device for measuring thermometers such as an infrared ear thermometer, an infrared body surface thermometer, an infrared human body surface temperature rapid screening instrument and the like, the measurement range of a blackbody radiation source for calibrating the infrared ear thermometer is 35-41 ℃, the temperature control stability is less than or equal to 0.02 ℃/10min, the radiation temperature uncertainty is not greater than 0.06 ℃, the effective emissivity of a blackbody cavity is not greater than 0.998, the front end of the opening of the blackbody cavity is not exposed out of a metal part of the cavity, the diameter of the cavity is 6-10 mm, the probe protection cover of the infrared thermometer is ensured to be in precise contact with the opening of the cavity, the front end of a probe of the infrared ear thermometer is flush with the opening of the cavity or extends into the opening of the cavity to be not greater than 2mm, the measurement range of the blackbody radiation source for calibrating the infrared body surface thermometer is 23-38 ℃, the temperature control stability is less than or equal, the effective emissivity of the blackbody cavity is more than or equal to 0.997, the cavity diameter of the blackbody cavity is 6-10 mm, and the requirements of the fast screening instrument for calibrating the surface temperature of the infrared human body and the infrared body surface thermometer on the blackbody radiation source are that the temperature control stability is less than or equal to 0.1 ℃/10 min;
the temperature of the wall surface of the blackbody cavity is measured by adopting a contact thermometer, preferably a platinum resistance thermometer or a glass thermometer, the contact thermometer is provided with an electric measuring or observing device, and the blackbody temperature uses the radiation temperature at the temperature controlled temperature.
The thermostatic bath is used for calibrating contact thermometers such as a glass thermometer, a mercury thermometer, a medical electronic thermometer and the like, the measurement range of a standard thermometer is (34.5-44.5) DEG C, the graduation value is not more than 0.05 ℃, the absolute value of the maximum temperature difference of a working area of the thermostatic bath is not more than 0.01 ℃, and the temperature fluctuation is not more than +/-0.01 ℃/10 min.
The thermostatic bath for metering and calibrating the glass thermometer is also provided with a water three-phase storage battery, a reading microscope, a magnifier, a steel ruler, a polarization stress meter, a centrifuge and a tachometer.
The calibration vehicle is further provided with a temperature and humidity standard box, a precision dew point meter, an electronic balance, a pressure standard device, a multifunctional calibration source and a stopwatch calibration device.
The calibration vehicle is used for calibrating a glass thermometer, a medical electronic thermometer, an infrared ear thermometer, an infrared forehead thermometer and an infrared screening instrument.
The application of the body temperature calibration trolley comprises the following steps:
s1: performing appearance inspection;
s2: conducting power-on inspection;
s3: insulation testing;
s4: inductance measurement and error calculation of the thermometer;
s5: measuring capacitance of the thermometer and calculating error;
s6: measuring capacitance loss of the thermometer and calculating an error;
s7: measuring resistance of the thermometer and calculating errors;
s8: and calculating the test frequency and the error of the thermometer.
In the prior art, a scheme introduction of combining a black body radiation source and other detection devices together to coordinate to form a complete set of mobile thermometer calibration system is provided, the invention of the application aims at overcoming the difficulty of the detection and calibration device in the prior art in synergism, and harsh requirements on calibration conditions and environment, and forming the final technical scheme of the mobile thermometer calibration vehicle of the application, and meanwhile, the application also provides an application method of calibration. The temperature accuracy of the whole blackbody radiation system is calibrated by a linear calibration method in the sectional calibration points, so that the nonlinear errors caused by a platinum resistor unbalanced temperature measuring bridge, a platinum resistor, a lead resistor and the like are further reduced, and the accuracy measurement precision of the thermometer is greatly improved.
Drawings
FIG. 1 is a schematic view of a calibration cart according to the present application;
FIG. 2 is a schematic view of the internal structure of the calibration cart;
FIG. 3 is a top view of the internal structure of the alignment cart;
FIG. 4 is a schematic view of a calibration cart according to embodiment 1 of the present application.
Wherein 1 is a blackbody radiation source; 2 is a thermostatic bath; 3 is a torque plate calibrating device; 4 is an electronic balance; 5 is a pressure standard device; 6 is a multifunctional standard source device; and 7 is a stopwatch calibrating device.
Advantageous effects
By adopting the mobile thermometer calibration vehicle, the calibration inspection time can be saved, the calibration door-to-door service of the thermometer is realized, and the calibration efficiency is improved; meanwhile, the calibration environment of the method is certified by national detection departments, meets the requirements of detection standards, and the calibration accuracy is 100%.
Detailed Description
Example 1
A calibration vehicle for a mobile thermometer is provided with an enhanced illumination system and an AI intelligent temperature control system, wherein the enhanced illumination system is used for providing compartment illumination in the calibration vehicle, the AI intelligent temperature control system can ensure the temperature control performance and the ventilation effect in the calibration vehicle, so that the calibration vehicle can reach the standard of constant temperature and humidity, the standard of constant temperature and humidity is (18-28) DEG C, and the relative humidity is (30-70)% RH; a power system is further arranged in the calibration trolley, and the power system comprises a voltage-stabilized power supply and an inverter and is used for providing stable 220V alternating current and 110V alternating current and 12V direct current; the power system is connected with the central control system and provides power for the central control system, the power system adopts various power sources to provide power, the power sources comprise solar energy, gasoline, electric energy or hydrogen energy, and the solar panel is arranged on the roof of the vehicle; the calibration vehicle is also provided with a water tank and a water purification bucket, and the water purification bucket is communicated with the outside of the vehicle body and used for maintaining the quality of air in the vehicle; the calibration vehicle is also internally provided with a metering management system which is connected with a laboratory information management system of the detection calibration center through a wifi base station in the vehicle, so that the functions of digital acquisition of metering detection, electronic original record making and certificate generation by one key can be realized; the calibration vehicle is further provided with a blackbody radiation source (1) and a constant temperature bath (2).
The blackbody radiation source is a standard device for measuring thermometers such as an infrared ear thermometer, an infrared body surface thermometer, an infrared human body surface temperature rapid screening instrument and the like, the measurement range of a blackbody radiation source for calibrating the infrared ear thermometer is 35-41 ℃, the temperature control stability is less than or equal to 0.02 ℃/10min, the radiation temperature uncertainty is not greater than 0.06 ℃, the effective emissivity of a blackbody cavity is not greater than 0.998, the front end of the opening of the blackbody cavity is not exposed out of a metal part of the cavity, the diameter of the cavity is 6-10 mm, the probe protection cover of the infrared thermometer is ensured to be in precise contact with the opening of the cavity, the front end of a probe of the infrared ear thermometer is flush with the opening of the cavity or extends into the opening of the cavity to be not greater than 2mm, the measurement range of the blackbody radiation source for calibrating the infrared body surface thermometer is 23-38 ℃, the temperature control stability is less than or equal, the effective emissivity of the blackbody cavity is more than or equal to 0.997, the cavity diameter of the blackbody cavity is 6-10 mm, and the requirements of the fast screening instrument for calibrating the surface temperature of the infrared human body and the infrared body surface thermometer on the blackbody radiation source are that the temperature control stability is less than or equal to 0.1 ℃/10 min;
the temperature of the wall surface of the blackbody cavity is measured by adopting a contact thermometer, preferably a platinum resistance thermometer or a glass thermometer, the contact thermometer is provided with an electric measuring or observing device, and the blackbody temperature uses the radiation temperature at the temperature controlled temperature.
The thermostatic bath is used for calibrating contact thermometers such as a glass thermometer, a mercury thermometer, a medical electronic thermometer and the like, the measurement range of a standard thermometer is (34.5-44.5) DEG C, the graduation value is not more than 0.05 ℃, the absolute value of the maximum temperature difference of a working area of the thermostatic bath is not more than 0.01 ℃, and the temperature fluctuation is not more than +/-0.01 ℃/10 min.
The thermostatic bath for metering and calibrating the glass thermometer is also provided with a water three-phase storage battery, a reading microscope, a magnifier, a steel ruler, a polarization stress meter, a centrifuge and a tachometer.
The calibration vehicle is further provided with a temperature and humidity standard box, a precision dew point meter, an electronic balance, a pressure standard device, a multifunctional calibration source and a stopwatch calibration device.
The calibration vehicle is used for calibrating a glass thermometer, a medical electronic thermometer, an infrared ear thermometer, an infrared forehead thermometer and an infrared screening instrument.
The application of the body temperature calibration trolley comprises the following steps:
s1: performing appearance inspection;
s2: conducting power-on inspection;
s3: insulation testing;
s4: inductance measurement and error calculation;
s5: measuring capacitance and calculating error;
s6: measuring capacitance loss and calculating error;
s7: measuring resistance and calculating error;
s8: and (4) calculating the test frequency and the error.
The appearance inspection in step S1 specifically includes:
s1-1, checking whether the appearance structure is intact, and whether the panel indication, the reading instrument, the manufacturer, the instrument number and the model information are clearly marked;
s1-2, checking whether the exposed part of the detected instrument is loose and mechanically damaged; whether the instrument accessories, the input line and the grounding end are complete or not; whether the switch and the knob can normally rotate.
The power-on check of step S2 specifically includes:
s2-1, switching on the power supply of the instrument to be calibrated, observing whether the reading instrument has display and display defects, and whether each switch and knob can be normally used;
s2-2 checks whether the zero reset function of the instrument to be calibrated is working properly.
The insulation test in step S3 specifically includes:
s3-1, connecting the power supply of the insulation resistance tester, setting the test voltage to be 500V, selecting a proper range, and resetting;
s3-2, connecting one test end of the insulation resistance tester to the tested device shell, and connecting one test end to the line end;
and S3-3, starting an output switch, reading and testing for not less than 10 seconds.
The inductance measurement and error calculation in step S4, and the calibration of the inductance measurement error adopts a direct comparison method, specifically including:
before S4-1 calibration, the instrument to be calibrated is electrified and preheated for more than 30 minutes;
s4-2, switching to a resistance measurement function, and selecting a measurement frequency and a measurement voltage;
s4-3, selecting a measuring range according to the standard resistor, connecting the calibrated instrument with a test cable, performing open-circuit calibration and short-circuit calibration, and resetting if the calibrated instrument has a zero resetting function; the test cable is connected with a stranded wire preferably;
s4-4, connecting two terminals with a circuit to connect the calibrated instrument and the standard resistor;
s4-5 measuring and reading;
s4-6, switching the range, and repeating the steps S4-1 to S4-5; the selection of the calibration point of the basic range is not less than 5 points, the selection of the calibration points of other ranges is not less than 1 point, and the calibration points are preferably selected uniformly in the corresponding ranges.
In the step S5, capacitance measurement and error calculation are performed, and the calibration of the capacitance measurement error adopts a direct comparison method, which specifically includes:
s5-1, switching to a capacitance measuring function, selecting a measuring frequency and a measuring voltage, and selecting the measuring frequency to be 100Hz if the nominal value of the measured standard capacitance is not less than 10 muF when no specific calibration requirement exists; otherwise, selecting 1000 Hz;
s5-2, selecting a proper measuring range according to the standard capacitor, connecting the calibrated instrument with the test cable, and performing open-circuit calibration and short-circuit calibration, wherein if the standard capacitor has a zero resetting function, zero resetting is required;
s5-3, connecting the calibrated instrument and the standard capacitor by a two-terminal connection circuit connection method or a four-terminal connection circuit connection method;
s5-4 measuring and reading;
s5-5, switching the measuring ranges, and repeating the steps from S5-1 to S5-4, wherein the calibration point of the basic measuring range is selected to be not less than 5 points, the calibration points of other measuring ranges are selected to be not less than 1 point, and the calibration points are uniformly selected in the corresponding measuring ranges in principle.
The step S6: and measuring capacitance loss and calculating errors, wherein the calibration of the measurement errors of the capacitance loss adopts a direct comparison method, a standard capacitance loss box is used as a standard device for the calibration of the capacitance loss, the step S5 is referred to in the calibration step, no less than 5 calibration points are selected, and the calibration points are uniformly distributed.
In the step S7, the resistance measurement and the error calculation are performed, and the calibration of the resistance measurement error adopts a direct comparison method, which specifically includes:
step S7-1, switching to a resistance measurement function, and selecting a proper measurement frequency and a proper measurement voltage;
s7-2, selecting a proper measuring range according to the set value of the resistance box, connecting the instrument to be calibrated with the test cable, and performing open-circuit calibration and short-circuit calibration, wherein if the instrument has a zero resetting function, the zero resetting is required;
step S7-3, connecting the calibrated instrument and the standard resistance box by a two-terminal connection circuit connection method or a four-terminal connection circuit connection method;
step S7-4, measuring and reading;
and S7-5, switching the measuring range, and repeating the steps S7-1 to S7-4, wherein the calibration point of the basic measuring range is selected to be not less than 5 points, the calibration points of other measuring ranges are selected to be not less than 1 point, and the calibration points are uniformly selected in the corresponding measuring range.
In the step S8, the test frequency and the error are calculated, the calibration of the inductance loss measurement error adopts a direct comparison method, the calibration of the test frequency adopts a frequency meter as a standard, the calibration step refers to the step S4, the reading of the frequency meter is used as a measured value, and the selection of the calibration point covers the working test frequency.
Wherein the basic error is calculated as follows:
the indication errors of inductance, capacitance loss and resistance measurement are expressed by formula (1), and the relative indication errors are expressed by formula (2).
Δ＝Px-PN………………………………(1)
Wherein:
Δ: indicating the value error;
γ: relative indication error;
Px: indicating the value of the tester to be calibrated;
PN: the settings of standard equipment.
Wherein, the error of the indication value of the test frequency is calculated as follows:
the indicating error of the test frequency is expressed by equation (3), and the relative indicating error is expressed by equation (4).
Δ＝Fx-FN………………………………(3)
Wherein:
Δ: indicating the value error;
γ: relative indication error;
Fx: the nominal value of the tester under calibration;
FN: measured values of standard equipment.
Wherein, under the test voltage condition of 500V, the insulation resistance between the line end and the shell is not less than 100M omega.
After calibration is performed according to the calibration method, a calibration result expression is formed according to a test result and a calculation result, the expression mode is a calibration certificate or a calibration report, and the calibration expression comprises the following information:
a) titles, such as "calibration certificate";
b) laboratory name and address;
c) the site where the calibration is performed (if different from the laboratory's address);
d) a unique identifier (e.g., a number) of the certificate or report, an identifier of each page and the total number of pages;
e) the name and address of the customer;
f) description and explicit identification of the subject being corrected;
g) the date the calibration was performed;
h) the identification of the technical specification according to which the calibration is based comprises a name and a code number;
i) the traceability and validity statement of the measurement standard used in the calibration;
j) a description of a calibration environment;
k) a description of the calibration results and their measurement uncertainty;
l) if the calibration result is related to the validity and application of the calibration result, setting and operation of the calibrated object in the calibration process are explained;
m) a specification of a deviation from the calibration specification;
n) the signature, job or equivalent identification of the certificate being verified and the calibration report issuer;
o) a statement that the calibration result is valid only for the object being calibrated;
p) no written laboratory approval, no partial duplication of the certificate or statement reported.
The calibration conditions for the test in example 1 are shown in the table:
Claims (8)
1. the calibration vehicle for the mobile thermometer is characterized in that the calibration vehicle is provided with an enhanced illumination system and an AI intelligent temperature control system, the enhanced illumination system is arranged on the inner roof of the calibration vehicle and connected with a power system of the calibration vehicle, the enhanced illumination system is used for providing compartment illumination in the calibration vehicle, the AI intelligent temperature control system is connected with a central control system of the calibration vehicle, the AI intelligent temperature control system can ensure the temperature control performance and the ventilation effect in the calibration vehicle, so that the calibration vehicle can reach the standard of constant temperature and humidity, the standard of constant temperature and humidity is (18-28) DEG C, and the relative humidity is (30-70)% RH; a power system is further arranged in the calibration trolley and comprises a voltage-stabilized power supply and an inverter, and the voltage-stabilized power supply is used for providing stable 220V alternating current and 110V alternating current and 12V direct current; the power system is connected with the central control system and provides power for the central control system, the power system adopts various power sources to provide power, the power sources comprise solar energy, gasoline, electric energy or hydrogen energy, and the solar panel is arranged on the roof of the vehicle; the calibration vehicle is also provided with a water tank and a water purification bucket, and the water purification bucket is communicated with the outside of the vehicle body and used for maintaining the quality of air in the vehicle; the calibration vehicle is also internally provided with a metering management system which is connected with a laboratory information management system of the detection calibration center through a wifi base station in the vehicle, so that the functions of digital acquisition of metering detection, electronic original record making and certificate generation through one key can be realized; the calibration vehicle is further provided with a blackbody radiation source (1) and a constant temperature bath (2).
2. The mobile thermometer calibration vehicle of claim 1, wherein the blackbody radiation source is a standard for thermometers such as an infrared ear thermometer, an infrared body surface thermometer, and an infrared human body surface temperature rapid screening instrument, the measurement range of the blackbody radiation source for calibrating the infrared ear thermometer is 35-41 ℃ C., the temperature control stability is less than or equal to 0.02 ℃/10min, the uncertainty of the radiation temperature is less than or equal to 0.06 ℃, the effective emissivity of the blackbody cavity is greater than or equal to 0.998, the metal part of the cavity is not exposed at the front end of the opening of the blackbody cavity, the diameter of the cavity is 6 mm-10 mm, the probe protective cover of the infrared thermometer is ensured to be precisely contacted with the opening of the cavity, the front end of the probe of the infrared ear thermometer is flush with the opening of the cavity or extends into the cavity opening by less than 2mm, the measurement range of the radiation source for calibrating the infrared body surface thermometer is 23-38 ℃ C., the temperature control stability is, the uncertainty of the radiation temperature is not more than 0.16 ℃, the effective emissivity of the blackbody cavity is not less than 0.997, the cavity diameter of the blackbody cavity is 6-10 mm, and the temperature control stability of the fast screening instrument for calibrating the surface temperature of the infrared human body and the surface thermometer for calibrating the infrared body surface temperature to the blackbody radiation source is not more than 0.1 ℃/10 min.
3. A mobile thermometer calibration trolley according to claim 1 wherein the black body cavity wall temperature is measured using a contact thermometer, preferably a platinum resistance thermometer or a glass thermometer, equipped with electrical measuring or observation means, the black body temperature using radiation temperature at a controlled temperature.
4. The mobile thermometer calibration cart of claim 1, wherein the thermostatic bath is used for calibrating contact thermometers such as glass thermometers, mercury thermometers, medical electronic thermometers, and the like, the standard thermometer measurement range is (34.5-44.5) DEG C, the division value is not more than 0.05 ℃, the absolute value of the maximum temperature difference of the working area of the thermostatic bath is not more than 0.01 ℃, and the temperature fluctuation is not more than +/-0.01 ℃/10 min.
5. A mobile thermometer calibration trolley according to claim 4, wherein the thermostatic bath for metering and calibrating the glass thermometer is further provided with a water three-phase battery, a reading microscope, a magnifier, a steel ruler, a polarization stress gauge, a centrifuge and a tachometer.
6. The mobile thermometer calibration cart of claim 1, further comprising a temperature and humidity standard box, a precision dew point meter, an electronic balance, a pressure standard device, a multifunctional calibration source, and a stopwatch calibration device.
7. The mobile body temperature calibration trolley according to claim 1, wherein the calibration trolley is used for calibrating a glass thermometer, a medical electronic thermometer, an infrared ear thermometer, an infrared forehead thermometer and an infrared screening instrument.
8. The use of the body temperature calibration cart of claim 1, wherein the application steps are as follows:
s1: performing appearance inspection;
s2: conducting power-on inspection;
s3: insulation testing;
s4: inductance measurement and error calculation of the thermometer;
s5: measuring capacitance of the thermometer and calculating error;
s6: measuring capacitance loss of the thermometer and calculating an error;
s7: measuring resistance of the thermometer and calculating errors;
s8: and calculating the test frequency and the error of the thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010233243.5A CN111521295A (en) | 2020-03-29 | 2020-03-29 | Mobile thermometer calibration vehicle and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010233243.5A CN111521295A (en) | 2020-03-29 | 2020-03-29 | Mobile thermometer calibration vehicle and application thereof |
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| Publication Number | Publication Date |
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| CN111521295A true CN111521295A (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010233243.5A Pending CN111521295A (en) | 2020-03-29 | 2020-03-29 | Mobile thermometer calibration vehicle and application thereof |
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| EP3379220A1 (en) * | 2017-03-21 | 2018-09-26 | Fluke Corporation | Device having tank shaped to produce flow direction and improve temperature stability and uniformity |
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Application publication date: 20200811 |