CN116430483A - Barometric data processing method, barometer and calibration system thereof - Google Patents
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
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Abstract
The disclosure relates to the technical field of barometric measurement, in particular to a barometric data processing method, a barometer and a calibration system thereof. The air pressure data processing method is applied to an air pressure instrument and comprises the following steps: acquiring a frequency signal and a temperature signal; and calculating the frequency signal and the temperature signal by adopting a fitting algorithm to obtain an air pressure value. According to the technical scheme, the barometer not only acquires the frequency signal, but also acquires the temperature signal, and the barometric value is obtained by calculating two physical quantities of the frequency signal and the temperature signal through a fitting algorithm, so that the calculated barometric value is less influenced by temperature factors, and the barometer can correct the barometric value according to the stored latest calibration information, so that the barometric value output by the barometer is higher in precision and can meet the requirements of daily work of domestic weather stations.
Description
Technical Field
The disclosure relates to the technical field of barometric measurement, in particular to a barometric data processing method, a barometer and a calibration system thereof.
Background
With the development of pressure sensor technology, the domestic weather station is increasing the demand for barometers, and because of the increasing of the metering workload of barometers, people are also providing higher demands for the measurement accuracy of barometers. However, the measurement accuracy of the conventional barometer is low, and the requirement of daily work of a domestic weather station cannot be met.
Disclosure of Invention
In order to solve the problems in the related art, embodiments of the present disclosure provide a barometer data processing method, a barometer, and a calibration system thereof.
In a first aspect, an embodiment of the present disclosure provides a method for processing air pressure data.
Specifically, the air pressure data processing method is applied to an air pressure instrument and comprises the following steps:
acquiring a frequency signal and a temperature signal;
and calculating the frequency signal and the temperature signal by adopting a fitting algorithm to obtain an air pressure value.
Optionally, the method further comprises:
storing the barometer calibration information;
and correcting the air pressure value based on the latest calibration information to obtain a corrected air pressure value.
Optionally, before said storing the barometer calendar calibration information, the method further comprises:
receiving calibration information of the barometer input by a man-machine interaction interface; or alternatively, the process may be performed,
acquiring calibration information of the barometer sent by an upper computer through a communication interface;
the calibration information is calculated by air pressure values respectively measured by an upper computer and an air pressure instrument.
Optionally, the upper computer is an air pressure standard device.
In a second aspect, an barometer is provided in an embodiment of the disclosure.
Specifically, the barometer includes:
the air pressure sensor is used for measuring air pressure and outputting an air pressure frequency electric signal and a temperature voltage signal;
the air pressure frequency conditioning circuit is used for processing the output air pressure frequency electric signal into a frequency signal;
the temperature voltage sampling circuit is used for processing the output temperature voltage signal into a temperature digital signal;
and the processor is used for calculating the air pressure value by adopting a fitting algorithm on the frequency signal and the temperature signal.
Optionally, the method further comprises:
the memory is used for storing the barometer historical calibration information;
the processor is also used for correcting the air pressure value based on the latest calibration information to obtain a corrected air pressure value.
Optionally, the method further comprises:
and the display touch control unit is used for displaying the air pressure value or the corrected air pressure value.
Optionally, the method further comprises:
and the communication interface is used for receiving the calibration information.
In a third aspect, embodiments of the present disclosure provide a barometer calibration system.
Specifically, the calibration system of the barometer comprises:
the barometer of any one of the second aspects;
the automatic standard air pressure generator is connected with an air pressure input port of the air pressure instrument;
the upper computer is in communication connection with the automatic standard air pressure generator and the air pressure instrument and is used for controlling the automatic standard air pressure generator to generate air pressure with a target air pressure value, acquiring an air pressure measured value obtained by measuring the air pressure with the target air pressure value by the air pressure instrument, calculating calibration information of the air pressure instrument based on the target air pressure value and the air pressure measured value and transmitting the calibration information to the air pressure instrument for storage.
In a fourth aspect, embodiments of the present disclosure provide a method for calibrating a barometer using the barometer calibration system of the third aspect.
Specifically, the method for calibrating the barometer comprises the following steps:
step one: the upper computer sends a calibration command, the barometer prohibits the barometer value correcting function, and the barometer does not correct the barometer value at the moment;
step two: setting at least one air pressure calibration point;
step three: the upper computer controls the automatic standard air pressure generator to generate an air pressure standard value of a first air pressure calibration point, and the air pressure instrument acquires the air pressure value of the first air pressure calibration point;
step four: the upper computer records the air pressure standard value of the first air pressure calibration point and the air pressure value of the air pressure instrument, and calculates to obtain the calibration data of the first air pressure calibration point;
step five: acquiring another air pressure calibration point, and repeating the third to fourth steps until all the air pressure calibration points are calibrated, so as to obtain the calibration data of all the air pressure calibration points;
step six: the upper computer calculates the precision of the barometer according to the calibration data, acquires the last calibration data of the barometer, and calculates the long-term stability;
step seven: the upper computer sends the calibration data to the barometer, and the barometer stores the calibration data;
step eight: the barometer starts a barometric pressure value correcting function, and the barometric pressure value obtained by the barometer is corrected by using the calibration data as calibration information of the barometer.
According to the barometric data processing method, the barometer and the calibration system thereof provided by the embodiment of the disclosure. The air pressure data processing method is applied to an air pressure instrument and comprises the following steps: acquiring a frequency signal and a temperature signal; and calculating the frequency signal and the temperature signal by adopting a fitting algorithm to obtain an air pressure value. According to the technical scheme, the barometer not only acquires the frequency signal, but also acquires the temperature signal, and the barometric pressure value is calculated by adopting a fitting algorithm on two physical quantities of the frequency signal and the temperature signal, so that the calculated barometric pressure value is less influenced by temperature factors; the barometer can correct the barometric value according to the stored latest calibration information, so that the barometric value output by the barometer is higher in accuracy, and the daily work requirement of the domestic weather station can be met.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
Other features, objects and advantages of the present disclosure will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a flowchart of a barometric pressure data processing method according to an embodiment of the disclosure.
FIG. 2 illustrates a step diagram for calibrating a barometer using a barometric data processing method according to an embodiment of the disclosure.
Fig. 3 shows a functional block diagram of a barometer according to an embodiment of the disclosure.
Fig. 4 shows a block diagram of a calibration system of a barometer according to an embodiment of the disclosure.
Fig. 5 shows a step diagram of calibrating a barometer with a barometer calibration system according to an embodiment of the disclosure.
Detailed Description
Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. In addition, for the sake of clarity, portions irrelevant to description of the exemplary embodiments are omitted in the drawings.
In this disclosure, it should be understood that terms such as "comprises" or "comprising," etc., are intended to indicate the presence of features, numbers, steps, acts, components, portions, or combinations thereof disclosed in this specification, and are not intended to exclude the possibility that one or more other features, numbers, steps, acts, components, portions, or combinations thereof are present or added.
In addition, it should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In the present disclosure, if an operation of acquiring user information or user data or an operation of presenting user information or user data to another person is referred to, the operations are all operations authorized, confirmed, or actively selected by the user.
With the development of pressure sensor technology, the domestic weather station is increasing the demand for barometers, and because of the increasing of the metering workload of barometers, people are also providing higher demands for the measurement accuracy of barometers. However, the measurement accuracy of the conventional barometer is low, and the requirement of daily work of a domestic weather station cannot be met.
Fig. 1 shows a flowchart of a barometric pressure data processing method according to an embodiment of the disclosure.
As shown in fig. 1, the air pressure data processing method includes the following steps S101 to S102:
step S101: acquiring a frequency signal and a temperature signal;
step S102: and calculating the frequency signal and the temperature signal by adopting a fitting algorithm to obtain an air pressure value.
According to the barometer in the barometer data processing method, the barometer not only acquires the frequency signal, but also acquires the temperature signal, and the barometer value is obtained by calculating the two physical quantities of the frequency signal and the temperature signal through a fitting algorithm, so that the calculated barometer value is less influenced by temperature factors, and the barometer can correct the barometer value according to the stored latest calibration information, so that the barometer output barometer value accuracy is higher, and the daily work requirement of a domestic weather station can be met.
According to an embodiment of the present disclosure, in step S101 of the present disclosure, that is, the step of acquiring the frequency signal and the temperature signal, firstly, the air pressure is measured by the air pressure sensor in the air pressure meter, and the air pressure frequency electric signal and the temperature voltage signal are output, then the output air pressure frequency electric signal is processed into the frequency signal by the air pressure frequency conditioning circuit, and the output temperature voltage signal is processed into the temperature digital signal by the temperature voltage sampling circuit.
According to the embodiment of the disclosure, in step S102 of the disclosure, that is, in the step of calculating the air pressure value by using a fitting algorithm on the frequency signal and the temperature signal, the air pressure value is calculated by using a fitting algorithm on the frequency signal and the temperature signal by using a processor, and specifically, the air pressure value is calculated according to two-dimensional air pressure fitting coefficients of two physical quantities of the frequency signal and the temperature signal.
Further, the air pressure data processing method of the present disclosure further includes calibration correction for air pressure values, specifically including the steps of: receiving calibration information of the barometer input by a man-machine interaction interface; or acquiring the calibration information of the barometer sent by the upper computer through a communication interface; the calibration information is obtained by calculating air pressure values respectively measured by an upper computer and an air pressure instrument, and the upper computer is an air pressure standard device; storing the barometer calibration information; and correcting the air pressure value based on the latest calibration information to obtain a corrected air pressure value.
Specifically, the upper computer, the automatic standard air pressure generator and the air pressure meter can communicate with each other. The barometer receives input calibration information through a man-machine interaction interface, or acquires calibration information sent by the barometer through a communication interface, and after the barometer stores the calibration information of the past time, the barometer corrects the barometer pressure value according to the latest stored calibration information, namely the latest stored calibration information, so as to obtain the corrected barometer pressure value.
FIG. 2 illustrates a step diagram for calibrating a barometer using a barometric data processing method according to an embodiment of the disclosure.
As shown in fig. 2, the steps of calibrating the barometer using the barometric data processing method of the present disclosure are: starting the barometer, acquiring a frequency signal, acquiring a temperature signal, calculating a barometric pressure value according to a fitting coefficient, judging whether the barometer stores calibration information or not, if not, returning to the first step, namely, re-acquiring the frequency signal, if yes, judging whether to carry out barometric pressure value correction, if not, returning to the first step, namely, re-acquiring the frequency signal, if not, carrying out barometric pressure value correction, acquiring the latest calibration information, and correcting the barometric pressure value according to the latest calibration information.
The present disclosure also discloses a barometer. Fig. 3 shows a functional block diagram of a barometer according to an embodiment of the disclosure.
As shown in fig. 3, the barometer comprises a barometric sensor, a barometric frequency electric signal and a temperature voltage signal are output to a barometric frequency conditioning circuit and a temperature voltage sampling circuit, the barometric frequency electric signal is processed into a frequency signal by the barometric frequency conditioning circuit and is transmitted to a processor, the temperature voltage signal is processed into a temperature digital signal by the temperature voltage sampling circuit and is transmitted to the processor, and the processor is respectively in bidirectional communication with a memory, a communication interface, a state indicating unit, an RCT clock and a display touch control unit.
According to the barometer disclosed by the invention, the calibration information is stored through the memory, so that the barometer measured barometer value is corrected conveniently, the efficiency of metering work is improved, and meanwhile, the barometer can be kept in a high-precision state for a long time.
In an embodiment of the present disclosure, an air pressure sensor for measuring air pressure and outputting an air pressure frequency electrical signal and a temperature voltage signal; the air pressure frequency conditioning circuit is used for processing the output air pressure frequency electric signal into a frequency signal; the temperature voltage sampling circuit is used for processing the output temperature voltage signal into a temperature digital signal; the processor is used for calculating the frequency signal and the temperature signal by adopting a fitting algorithm to obtain an air pressure value, and correcting the air pressure value based on the latest calibration information to obtain a corrected air pressure value; the memory is used for storing the barometer historical calibration information; the display touch control unit is used for displaying the air pressure value or the corrected air pressure value; a communication interface for receiving the calibration information; the state indicating unit is used for indicating the running state of the barometer; the RCT clock is used for providing a real-time clock for the barometer.
Specifically, the functions of each functional module in the barometer of the present disclosure are:
(1) Air pressure sensor: the air pressure sensor disclosed by the disclosure can be used for example as a silicon resonance air pressure sensor, and is used for sensing two physical quantities of air pressure and temperature and outputting an air pressure frequency electric signal and a temperature voltage signal.
(2) Air pressure frequency conditioning circuit: the air pressure frequency electric signal output by the silicon resonance air pressure sensor is conditioned into a frequency signal which can be directly measured by a processor.
(3) Temperature voltage sampling circuit: the temperature voltage signal output by the silicon resonance air pressure sensor is converted into a temperature digital signal which can be directly collected by the processor.
(4) A processor: collecting frequency signals, collecting temperature signals, calculating an air pressure value according to the two-dimensional air pressure fitting coefficient, reading and writing the air pressure fitting coefficient and calibration information, performing data communication processing, judging the state of the barometer, and outputting an instruction to obtain a real-time clock.
(5) A memory: and storing the two-dimensional air pressure fitting coefficient, the calibration information and the parameters of the air pressure meter of the silicon resonant air pressure sensor.
(6) Communication interface: and carrying out data transmission.
(7) Displaying a touch control unit: and the man-machine interaction is realized.
(8) Status indication unit: the operating state of the barometer is indicated, including whether the barometer is operating normally or not, and whether the barometer value can be corrected using the calibration information.
(9) RTC clock: a real time clock is provided for the barometer.
According to an embodiment of the present disclosure, the steps of the barometer of the present disclosure for calculating the barometric pressure value are specifically as follows:
step one: the processor captures the air pressure frequency edge through the air pressure frequency conditioning circuit and calculates the air pressure frequency value.
Step two: the processor is communicated with an AD chip of the temperature and voltage sampling circuit through an SPI interface, and digital temperature signal values converted and output by the AD chip are obtained.
Step three: the barometric pressure value is calculated according to equation 1:
wherein P (f, t) is the air pressure value, f is the air pressure frequency value,t is a digital temperature signal value, K ij 、f 0 、K f 、t 0 、K t Fitting coefficients for the barometric sensor.
Step four: and judging whether the barometer stores calibration information or not, and whether the barometer is corrected according to the stored calibration information.
Step five: if the air pressure value is not required to be corrected according to the calibration information stored by the air pressure instrument, the process goes to the first step to calculate the air pressure value next time; otherwise, the latest calibration information is acquired.
Step six: and carrying out interpolation calculation on the corrected air pressure value according to the air pressure standard value of each detection point in the latest calibration information, the air pressure measurement value of the air pressure instrument and the air pressure value calculated according to the fitting coefficient currently.
The disclosure also discloses a barometer calibration system. Fig. 4 shows a block diagram of a calibration system of a barometer according to an embodiment of the disclosure.
As shown in fig. 4, the barometer calibration system includes: the barometer is an automatic standard barometric pressure generator and an upper computer. Wherein, the automatic standard air pressure generator is connected with the air pressure input port of the air pressure instrument; the upper computer is in communication connection with the automatic standard air pressure generator and the air pressure instrument and is used for controlling the automatic standard air pressure generator to generate air pressure with a target air pressure value, acquiring an air pressure measured value obtained by measuring the air pressure with the target air pressure value by the air pressure instrument, calculating calibration information of the air pressure instrument based on the target air pressure value and the air pressure measured value and transmitting the calibration information to the air pressure instrument for storage.
For example, the upper computer is an air pressure standard device, and then the air passage output port of the automatic standard air pressure generator is connected with the air pressure input port of the air pressure instrument through a pipeline, the air pressure standard device controls the automatic standard air pressure generator to generate air pressure of a target air pressure value through a 232 communication interface, the air pressure standard device also obtains an air pressure measured value of the air pressure instrument through the 232 communication interface, and then the air pressure standard device calculates calibration information of the air pressure instrument based on the target air pressure value and the air pressure measured value and sends the calibration information to the air pressure instrument for storage.
The present disclosure also discloses a method of calibrating a barometer using a barometer calibration system. Fig. 5 shows a step diagram of calibrating a barometer with a barometer calibration system according to an embodiment of the disclosure.
The steps include:
step one: the upper computer sends a calibration command, the barometer prohibits the barometer value correcting function, and the barometer does not correct the barometer value at the moment;
step two: setting at least one air pressure calibration point;
step three: the upper computer controls the automatic standard air pressure generator to generate an air pressure standard value of a first air pressure calibration point, and the air pressure instrument acquires the air pressure value of the first air pressure calibration point;
step four: the upper computer records the air pressure standard value of the first air pressure calibration point and the air pressure value of the air pressure instrument, and calculates to obtain the calibration data of the first air pressure calibration point;
step five: acquiring another air pressure calibration point, and repeating the third to fourth steps until all the air pressure calibration points are calibrated, so as to obtain the calibration data of all the air pressure calibration points;
step six: the upper computer calculates the precision of the barometer according to the calibration data, acquires the last calibration data of the barometer, and calculates the long-term stability;
step seven: the upper computer sends the calibration data to the barometer, and the barometer stores the calibration data;
step eight: the barometer starts a barometric pressure value correcting function, and the barometric pressure value obtained by the barometer is corrected by using the calibration data as calibration information of the barometer.
Specifically, as shown in fig. 5, the barometer is started, the upper computer sends a calibration command, at this time, the barometer prohibits the barometer correction function, that is, the barometer does not correct the barometer value, at least one barometric calibration point is set, after the upper computer obtains the first barometric calibration point, the upper computer controls the automatic standard barometric generator to generate a barometric standard value of the first barometric calibration point, the barometric meter obtains the barometric value of the first barometric calibration point, and waits for stabilization, after stabilization, the upper computer records the barometric standard value of the first barometric calibration point and the barometric value of the barometric meter, calculates to obtain calibration data of the first barometric calibration point, at this time, the first barometric calibration point is calibrated, the next barometric calibration point is obtained, and the steps are repeated until all barometric calibration points are calibrated. The upper computer reads the last calibration data of the barometer, calculates the long-term stability and the precision, transmits the last calibration data to the barometer, and stores the calibration data, at this time, the barometer has a barometric value correction function, and if the barometric value correction function is started, the barometric value obtained by the barometer can be corrected by using the current calibration data as the calibration information of the barometer.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the invention referred to in this disclosure is not limited to the specific combination of features described above, but encompasses other embodiments in which any combination of features described above or their equivalents is contemplated without departing from the inventive concepts described. Such as those described above, are mutually substituted with the technical features having similar functions disclosed in the present disclosure (but not limited thereto).
Claims (10)
1. A barometric data processing method, applied to a barometer, comprising:
acquiring a frequency signal and a temperature signal;
and calculating the frequency signal and the temperature signal by adopting a fitting algorithm to obtain an air pressure value.
2. The method as recited in claim 1, further comprising:
storing the barometer calibration information;
and correcting the air pressure value based on the latest calibration information to obtain a corrected air pressure value.
3. The method of claim 2, wherein prior to said storing said barometer almanac calibration information, said method further comprises:
receiving calibration information of the barometer input by a man-machine interaction interface; or alternatively, the process may be performed,
acquiring calibration information of the barometer sent by an upper computer through a communication interface;
the calibration information is calculated by air pressure values respectively measured by an upper computer and an air pressure instrument.
4. The method of claim 3, wherein the host computer is a barometric pressure standard.
5. A barometer, comprising:
the air pressure sensor is used for measuring air pressure and outputting an air pressure frequency electric signal and a temperature voltage signal;
the air pressure frequency conditioning circuit is used for processing the output air pressure frequency electric signal into a frequency signal;
the temperature voltage sampling circuit is used for processing the output temperature voltage signal into a temperature digital signal;
and the processor is used for calculating the air pressure value by adopting a fitting algorithm on the frequency signal and the temperature signal.
6. The barometer of claim 5, further comprising:
the memory is used for storing the barometer historical calibration information;
the processor is also used for correcting the air pressure value based on the latest calibration information to obtain a corrected air pressure value.
7. The barometer of claim 5 or 6, further comprising:
and the display touch control unit is used for displaying the air pressure value or the corrected air pressure value.
8. The barometer of claim 7, further comprising:
and the communication interface is used for receiving the calibration information.
9. A barometer calibration system, comprising:
a barometer according to any one of claims 5 to 8;
the automatic standard air pressure generator is connected with an air pressure input port of the air pressure instrument;
the upper computer is in communication connection with the automatic standard air pressure generator and the air pressure instrument and is used for controlling the automatic standard air pressure generator to generate air pressure with a target air pressure value, acquiring an air pressure measured value obtained by measuring the air pressure with the target air pressure value by the air pressure instrument, calculating calibration information of the air pressure instrument based on the target air pressure value and the air pressure measured value and transmitting the calibration information to the air pressure instrument for storage.
10. A method of calibrating a barometer using the barometer calibration system of claim 9, comprising the steps of:
step one: the upper computer sends a calibration command, the barometer prohibits the barometer value correcting function, and the barometer does not correct the barometer value at the moment;
step two: setting at least one air pressure calibration point;
step three: the upper computer controls the automatic standard air pressure generator to generate an air pressure standard value of a first air pressure calibration point, and the air pressure instrument acquires the air pressure value of the first air pressure calibration point;
step four: the upper computer records the air pressure standard value of the first air pressure calibration point and the air pressure value of the air pressure instrument, and calculates to obtain the calibration data of the first air pressure calibration point;
step five: acquiring another air pressure calibration point, and repeating the third to fourth steps until all the air pressure calibration points are calibrated, so as to obtain the calibration data of all the air pressure calibration points;
step six: the upper computer calculates the precision of the barometer according to the calibration data, acquires the last calibration data of the barometer, and calculates the long-term stability;
step seven: the upper computer sends the calibration data to the barometer, and the barometer stores the calibration data;
step eight: the barometer starts a barometric pressure value correcting function, and the barometric pressure value obtained by the barometer is corrected by using the calibration data as calibration information of the barometer.
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