CN104330181A - Temperature measurement method by adopting multiple sensors to overcome errors - Google Patents
Temperature measurement method by adopting multiple sensors to overcome errors Download PDFInfo
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- CN104330181A CN104330181A CN201410561791.5A CN201410561791A CN104330181A CN 104330181 A CN104330181 A CN 104330181A CN 201410561791 A CN201410561791 A CN 201410561791A CN 104330181 A CN104330181 A CN 104330181A
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Abstract
The invention discloses a temperature measurement method by adopting multiple sensors to overcome errors. The method comprises the following specific steps: A, m sensors are randomly selected from n sensors to measure environment temperatures, and a measured average environment temperature is obtained, wherein both m and n are integers; B, the remaining n-m sensors are adopted to measure environment temperatures, a measured average temperature is obtained, the selected m sensors are heated and dried, and the heating time duration is T1; and after heating is over, the selected m sensors are cooled via air convection until the temperature is gradually equal to the environment temperature, and the cooling time duration is T2; and C, after cooling is over, the selected m sensors are adopted for temperature measurement, the average value of the measured temperatures is continuously obtained, and the time for temperature measurement is T1+T2; and the remaining n-m sensors start to be heated and dried and cooled to the environment temperature, and the time is T1+T2.
Description
Technical field
The present invention relates to a kind of environment temperature measuring method, particularly relate to a kind of thermometry adopting multiple sensor to overcome error, belong to field of temperature measurement.
Background technology
Temperature is a very important environmental parameter, life and the environment temperature of people are closely bound up, real-time measures ambient temperature is needed in industrial processes, also temperature survey is be unable to do without in agricultural production, at present, in the weather environment such as weather station and radiosonde field of detecting, conventional temperature sensor many employings platinum resistance or thermistor carry out temperature survey.Because ice, snow, raindrop, water dust, dew etc. are liquid or solid water may stick to sensor surface, the evaporation endothermic that water dust, raindrop and dew drip, the thawing of ice and snow and distillation all may cause measuring tempeature lower than the actual temperature of atmospheric environment, what water dust, raindrop and dew dripped freeze, and release latent heat may cause measures ambient temperature higher than environment temperature, causes certain measuring error.
Such as application number is a kind of thermometry of " 201210161611.5 ", comprise following process: treat that the external container of thermometric target attaches one deck measuring media accommodating, and the first temperature sensor is set between described measuring media inwall and described container outer wall; Described measuring media outer wall is provided with the second temperature sensor, according to the temperature measured by described first temperature sensor and the second temperature sensor, in conjunction with the thermal diffusivity of described container material quality and measuring media, obtains the temperature treating thermometric target in described container.This invention adopts the mode of indirectly extrapolation, and can solve high-temperature, high corrosion and the indeterminable problem of general temperature survey under toxic environment, and also reduce the requirement to surveying instrument, structure is simply, cost-saving.Although this invention can detect with middle temperature information, but need further to be optimized in accuracy of detection, and can not overcome because aqueous water or solid water stick to sensor surface and produce the limitation of error, often adopt in context of detection in addition and singly organize temperature measurement module, cause measurement result to there is error inaccurate.
And for example application number is a kind of thermometry of " 201110303076.8 ".Even if this thermometry is formed with film on measuring object thing, also can measure the temperature of measuring object thing exactly than ever.It comprises following operation: the measurement point light from light source being sent to the measuring object thing being formed with film on substrate; The 1st interference wave formed the reflected light on the surface by substrate, the reflected light by the interface between substrate and film, the 2nd interference wave that the reflected light at the back side at film is formed are measured; Calculate from the 1st interference wave to the optical path length of the 2nd interference wave; According to the thickness of the Strength co-mputation film of the 2nd interference wave; The path difference between the optical path length of substrate and the optical path length calculated is calculated according to the thickness of the film calculated; According to the path difference that calculates correct calculate from the 1st interference wave to the optical path length of the 2nd interference wave; Utilize the temperature of the measurement point of the optical path length computation and measurement object be corrected.Although this invention can detect with middle temperature information, need further to be optimized in accuracy of detection, and can not overcome because aqueous water or solid water stick to sensor surface and produce the limitation of error.Often adopt in context of detection in addition and singly organize temperature measurement module, cause measurement result to there is error out of true.
Summary of the invention
Technical matters to be solved by this invention is the deficiency for background technology, provide a kind of thermometry adopting multiple sensor to overcome error, structure is simple, and carries out temperature survey average by organizing sensor more, effectively improves measuring accuracy.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
Adopt multiple sensor to overcome a thermometry for error, specifically comprise following steps:
Steps A, chooses m sensor measurement environment temperature arbitrarily, the environment temperature of m sensor measurement is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center in n sensor; Wherein n is more than or equal to 3, m and n is integer;
Step B, adopt remaining n-m sensor measurement environment temperature, the environment temperature of n-m sensor measurement is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center, heating, drying is carried out to m the sensor that steps A is chosen, if the length of heat time is T1 simultaneously; After heating terminates, continue to carry out cooling to this m sensor by cross-ventilation, until the temperature of this m sensor progressively equals environment temperature, if the length of cool time is T2;
Step C, after cooling completes, continue to adopt m sensor in steps A to carry out thermometric, the environment temperature of m sensor measurement is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center, the time of thermometric is T1+T2; N-m the sensor of step B is started to heating, drying and be cooled to environment temperature simultaneously, the time is T1+T2;
Step D, repeated execution of steps A, to step C, obtain the mean value of measuring tempeature, and then realize free of discontinuities measurement.
Preferably, the accurate heating resistor of Low Drift Temperature is adopted to carry out heating, drying to sensor.
Preferably, described sensor is DS18B20 temperature sensor.
Preferably, described heating resistor also connects and one to one temperature control circuit equal with its quantity, for monitor temperature sensor temperature, and then controls heating resistor.
Preferably, described sensor also connects a microprocessor module and a communication unit; Described microprocessor module is used for counting statistics heating cooling and thermometric time, and described communication unit is used for measurement data to transmit.
Preferably, described microprocessor module is AVR single chip, and described communication unit is wireless communication module.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1, volume of the present invention little, broad covered area, functional diversities, convenient stable, is easy to operation, is convenient to management, can monitoring of environmental temperature parameter effectively;
2, by carrying out heating, drying process to many group sensors, averaging, effectively overcoming because aqueous water or solid water stick to sensor surface and produce the limitation of error, overcome error, improve measuring accuracy;
3, alternately complete oven dry, cooling and surveying work by many group sensors, ask for the mean value of measurement, make measuring accuracy more accurate, realize free of discontinuities and measure, effectively improve and measure efficiency.
Accompanying drawing explanation
Fig. 1 is method of work process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As shown in Figure 1, a kind of thermometry adopting multiple sensor to overcome error, specifically comprises following steps:
Steps A, chooses m sensor measurement environment temperature arbitrarily, the environment temperature of m sensor measurement is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center in n sensor; Wherein n is more than or equal to 3, m and n is integer;
Step B, adopt remaining n-m sensor measurement environment temperature, the environment temperature of n-m sensor measurement is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center, heating, drying is carried out to m the sensor that steps A is chosen, if the length of heat time is T1 simultaneously; After heating terminates, continue to carry out cooling to this m sensor by cross-ventilation, until the temperature of this m sensor progressively equals environment temperature, if the length of cool time is T2;
Step C, after cooling completes, continue to adopt m sensor in steps A to carry out thermometric, the environment temperature of m sensor measurement is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center, the time of thermometric is T1+T2; N-m the sensor of step B is started to heating, drying and be cooled to environment temperature simultaneously, the time is T1+T2;
Step D, repeated execution of steps A, to step C, obtain the mean value of measuring tempeature, and then realize free of discontinuities measurement.
When getting 3 for n and getting, during m=1, then n-m=2, that is:
Steps A, chooses m sensor measurement environment temperature arbitrarily, the environment temperature of 1 sensor measurement is uploaded to Surveillance center in 3 sensors;
Step B, adopt remaining 2 sensor measurement environment temperatures, the environment temperature of 2 sensor measurements is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center, heating, drying is carried out to 1 sensor that steps A is chosen, if the length of heat time is T1 simultaneously; After heating terminates, continue to carry out cooling to this 1 sensor by cross-ventilation, until the temperature of this 1 sensor progressively equals environment temperature, if the length of cool time is T2;
Step C, after cooling completes, continue to adopt 1 sensor in steps A to carry out thermometric, the environment temperature of 1 sensor measurement is uploaded to Surveillance center, and the time of thermometric is T1+T2; Remaining 2 sensors are started to heating, drying and are cooled to environment temperature simultaneously, the time is T1+T2;
When n get 4 get time, during m=2, then n-m=2, that is:
Steps A, chooses 2 sensor measurement environment temperatures arbitrarily, the environment temperature of 2 sensor measurements is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center in 4 sensors;
Step B, adopt remaining 2 sensor measurement environment temperatures, the environment temperature of 2 sensor measurements is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center, heating, drying is carried out to 2 sensors that steps A is chosen, if the length of heat time is T1 simultaneously; After heating terminates, continue to carry out cooling to these 2 sensors by cross-ventilation, until the temperature of these 2 sensors progressively equals environment temperature, if the length of cool time is T2;
Step C, after cooling completes, continue to adopt 2 sensors in steps A to carry out thermometric, the environment temperature of 2 sensor measurements is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center, the time of thermometric is T1+T2; Remaining 2 sensors are started to heating, drying and are cooled to environment temperature simultaneously, the time is T1+T2;
Wherein, the accurate heating resistor of Low Drift Temperature is adopted to carry out heating, drying to sensor, described sensor is DS18B20 temperature sensor, described heating resistor also connects and one to one temperature control circuit equal with its quantity, for monitor temperature sensor temperature, and then control heating resistor, described sensor also connects a microprocessor module and a communication unit; Described microprocessor module is used for counting statistics heating cooling and thermometric time, and described communication unit is used for measurement data to transmit, and described microprocessor module is AVR single chip, and described communication unit is wireless communication module.
Can be used in Environment temperature supervision system, design system can be specific as follows: the multiple wireless sensor networks comprising aggregation node, Surveillance center and be made up of multiple sensor node, described sensor node comprises temperature measurement module that at least two groups measure for alternately free of discontinuities and and one to one temperature measurement circuit and for temperature measurement module replace micro-control module that free of discontinuities measures, heating module that described temperature measurement module comprise a temperature sensor and for temperature sensor heat equal with its quantity; Heating module alternately heats the impact that multiple temperature sensor removing physical environment brings, obtain environment accurate temperature simultaneously, temperature sensor measurement temperature is transferred to aggregation node by described temperature measurement module, and ambient parameter information gathers and is uploaded to Surveillance center by transistroute by described aggregation node.
Wherein, described sensor node also comprises a communication unit and a power supply unit; Described temperature measurement module connects micro-control unit, described micro-control unit connects communication unit, described power supply unit provides required power supply for sensor node, wireless connections are passed through between described sensor node, described heating module is the accurate heating resistor of Low Drift Temperature, described micro-control module is AVR single chip, described power supply unit is chargeable lithium cell, a temperature sensor is connected with a heating resistor, metering circuit mainly comprises an analog to digital converter, and this analog to digital converter is connected with microcontroller.Whole temperature measurement module is primarily of two temperature sensors, two heating resistors, two control circuit based on metal-oxide-semiconductor, resistance measuring circuit and microcontroller compositions.
Temperature sensor measurement temperature is transferred to aggregation node by described temperature measurement module, and ambient parameter information gathers and is uploaded to Surveillance center by transistroute by described aggregation node, and then obtains accurately temperature information.
During work, first temperature sensor is utilized to carry out data acquisition to community temperature, because the change weather environment along with season changes, sleet can be there is, morning dew etc. stick to measuring accuracy temperature sensor affecting temperature sensor, based on this, we adopt and organize temperature measurement module more, by heating resistor, temperature sensor is heated, cooling, now testing circuit detects in real time to the state of temperature sensor at any time, remove extraneous physical environment as the impact of sleet covering on sensor, the temperature information of collection is converged to aggregation node and carries out information aggregation process by multiple sensor node, wirelessly Detection Information is transferred to Surveillance center simultaneously, staff follows the exact value according to temperature, further arrangement community work.Volume of the present invention is little, broad covered area, functional diversities, convenient stable, be easy to operation, be convenient to management, can monitoring of environmental temperature parameter effectively; By carrying out heating, drying process to temperature sensor, effectively overcoming because aqueous water or solid water stick to sensor surface and produce the limitation of error, improve measuring accuracy; Alternately complete oven dry, cooling and surveying work by two sensors, realize free of discontinuities and measure, effectively improve and measure efficiency.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And these belong to connotation of the present invention the apparent change of extending out or variation still belong to protection scope of the present invention.
Claims (6)
1. adopt multiple sensor to overcome a thermometry for error, it is characterized in that: specifically comprise following steps:
Steps A, chooses m sensor measurement environment temperature arbitrarily, the environment temperature of m sensor measurement is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center in n sensor; Wherein n is more than or equal to 3, m and n is integer;
Step B, adopt remaining n-m sensor measurement environment temperature, the environment temperature of n-m sensor measurement is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center, heating, drying is carried out to m the sensor that steps A is chosen, if the length of heat time is T1 simultaneously; After heating terminates, continue to carry out cooling to this m sensor by cross-ventilation, until the temperature of this m sensor progressively equals environment temperature, if the length of cool time is T2;
Step C, after cooling completes, continue to adopt m sensor in steps A to carry out thermometric, the environment temperature of m sensor measurement is drawn average ambient temperature through convergence processing, and then is uploaded to Surveillance center, the time of thermometric is T1+T2; N-m the sensor of step B is started to heating, drying and be cooled to environment temperature simultaneously, the time is T1+T2;
Step D, repeated execution of steps A, to step C, obtain the mean value of measuring tempeature, and then realize free of discontinuities measurement.
2. a kind of thermometry adopting multiple sensor to overcome error according to claim 1, is characterized in that: adopt the accurate heating resistor of Low Drift Temperature to carry out heating, drying to sensor.
3. a kind of thermometry adopting multiple sensor to overcome error according to claim 1, is characterized in that: described sensor is DS18B20 temperature sensor.
4. a kind of thermometry adopting multiple sensor to overcome error according to claim 1, it is characterized in that: described heating resistor also connects and one to one temperature control circuit equal with its quantity, for monitor temperature sensor temperature, and then control heating resistor.
5. a kind of thermometry adopting multiple sensor to overcome error according to claim 1, is characterized in that: described sensor also connects a microprocessor module and a communication unit; Described microprocessor module is used for counting statistics heating cooling and thermometric time, and described communication unit is used for measurement data to transmit.
6. a kind of thermometry adopting multiple sensor to overcome error according to claim 5, it is characterized in that: described microprocessor module is AVR single chip, described communication unit is wireless communication module.
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Application publication date: 20150204 |