CN112540150A - Sensor performance evaluation device, method and system - Google Patents
Sensor performance evaluation device, method and system Download PDFInfo
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Abstract
The invention relates to the technical field of sensors, and discloses a sensor performance evaluation device, a method and a system, wherein the device comprises: a control system and an environment setting system; the control system is used for: controlling an environment setting system to generate an environment meeting preset detection conditions; acquiring detection data obtained by detecting an environment meeting preset detection conditions by a sensor; and obtaining evaluation data for evaluating the performance of the sensor according to the detection data. The invention can conveniently and comprehensively evaluate the performance of the sensor.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a sensor performance evaluation device, method and system.
Background
The sensing technology is one of main technologies of information technology, a gas sensor is widely used for real-time gas monitoring and alarming in the fields of aerospace, military, environment, safety inspection and the like, a large amount of gas sensors are also used for gas and odor identification in the industrial fields of food, chemical engineering and the like, the application requirement drives the rapid development of the gas sensing technology, and various types of gas sensors are developed based on the principles of electrochemistry/catalytic combustion, laser modulation, non-dispersive infrared, semiconductors and the like.
With the continuous improvement of science and technology, particularly the emergence of composite materials such as nano materials, graphene and the like, conditions are created for the development of sensors, a gas detection system formed by the sensors is greatly improved in the aspects of system test precision, accuracy and the like, and particularly, an intelligent gas identification instrument adopting a gas sensor array and a mode identification technology has wider application prospects in the aspects of military affairs, petrochemical industry, environmental detection and the like, and becomes a hotspot of research in the field of gas sensing technology in recent years. In recent years, many domestic and foreign organizations adopt an array sensing method, increase the sensing detection information quantity, acquire multi-parameter output of a detected atmosphere environment, and basically realize the identification of hydrocarbons, hydrogen sulfide, toluene, isobutene and other gases, and the miniaturization and intelligent application of gas sensing detection will be a necessary trend of development.
On the other hand, the sensor generally has a complex use environment, and various factors such as temperature, humidity, flow rate and mutual interference of mixed gas bring great challenges to the miniaturization and intelligent application of gas sensing detection, so that a sensor performance test evaluation method and device are urgently needed to test and evaluate the performance of the sensor, comprehensively investigate the consistency and stability of the sensor, and create conditions for intelligent application of a novel sensing technology.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a sensor performance evaluation device, a method and a system, which can solve the technical problem that the performance of a sensor cannot be comprehensively and conveniently evaluated in the prior art.
A first aspect of the present invention provides a sensor performance evaluation apparatus, including: a control system and an environment setting system;
the control system is configured to:
controlling the environment setting system to generate an environment meeting preset detection conditions;
acquiring detection data obtained by detecting the environment meeting the preset detection condition by a sensor;
and obtaining evaluation data for evaluating the performance of the sensor according to the detection data and the preset detection condition.
Optionally, the apparatus further comprises an experimental box, the environment setting system generating the environment within the experimental box.
Optionally, the apparatus further includes a feedback system, configured to detect an environment generated by the environment setting system and obtain feedback data; the control system is used for obtaining and obtaining adjusting data according to the feedback data and the preset detection condition, and controlling the environment setting system to adjust the environment generated by the environment setting system according to the adjusting data until the environment meets the preset detection condition.
Optionally, the preset detection condition includes parameter data of the detection object detected by the sensor, and the parameter data includes components and component ratios of the detection object; the environment setting system comprises a detection object configuration system, and the control system controls the detection object configuration system to generate the detection object meeting the parameter data.
Optionally, the analyte comprises a gas, and the parameter data comprises a gas component of the analyte and a gas concentration of each gas component; the detector configuration system comprises a multi-component dynamic gas distribution system and/or a liquid organic gas distribution system.
Optionally, the preset detection condition includes a temperature range, the environment setting system includes a temperature adjusting system, and the temperature adjusting system includes a heating system, a refrigerating system, and a temperature detection system; the temperature detection system is used for detecting the temperature in the experiment box, and under the condition that the temperature is less than the lower temperature limit of the temperature range, the control system starts the heating system to heat the interior of the experiment box until the temperature is within the temperature range; in the case that the temperature is greater than the upper temperature limit of the temperature range, the control system starts the refrigeration system to refrigerate the interior of the experimental box until the temperature is within the temperature range.
Optionally, the preset detection condition includes a humidity range, the environment setting system includes a humidity adjusting system, and the control system controls the humidity adjusting system to make the humidity in the experiment box meet the humidity range; the control system controls the humidity adjusting system to mix dry gas and saturated humidity gas at the same preset temperature according to a preset proportion to obtain constant humidity gas, so that the humidity is within the humidity range.
A second aspect of the present invention provides a sensor performance evaluation method, including:
controlling an environment setting system to generate an environment meeting preset detection conditions;
acquiring detection data obtained by detecting the environment meeting the preset detection condition by a sensor;
and obtaining evaluation data for evaluating the performance of the sensor according to the detection data and the preset detection condition.
Optionally, the method further includes:
and controlling the environment setting system to generate the environment in the experimental box.
Optionally, the method further includes:
the control feedback system detects the environment generated by the environment setting system and obtains feedback data;
acquiring and obtaining adjusting data according to the feedback data and the preset detection condition;
and controlling the environment setting system to adjust the environment generated by the environment setting system according to the adjusting data until the environment meets the preset detection condition.
Optionally, the preset detection condition includes parameter data of the detection object detected by the sensor, and the parameter data includes components and component ratios of the detection object; the environment setting system comprises a detection object configuration system, and the step of controlling the environment setting system to generate the environment meeting the preset detection condition comprises the following steps:
and controlling the detection object configuration system to generate the detection object meeting the parameter data.
Optionally, the analyte comprises a gas, and the parameter data comprises a gas component of the analyte and a gas concentration of each gas component; the detector configuration system comprises a multi-component dynamic gas distribution system and/or a liquid organic gas distribution system.
Optionally, the preset detection condition includes a temperature range, the environment setting system includes a temperature adjusting system, and the temperature adjusting system includes a heating system, a refrigerating system, and a temperature detection system; the temperature detection system is used for detecting the temperature in the experimental box, and the step of controlling the environment setting system to generate the environment meeting the preset detection condition comprises the following steps:
in the case that the temperature is less than the lower temperature limit of the temperature range, starting the heating system to heat the interior of the experimental box until the temperature is within the temperature range;
and in the case that the temperature is greater than the upper temperature limit of the temperature range, starting the refrigeration system to refrigerate the interior of the experiment box until the temperature is within the temperature range.
Optionally, the preset detection condition includes a humidity range, the environment setting system includes a humidity adjusting system, and the step of controlling the environment setting system to generate an environment satisfying the preset detection condition includes:
controlling the humidity adjusting system to enable the humidity in the experiment box to meet the humidity range;
the step of controlling the humidity adjusting system to enable the humidity in the experiment box to meet the humidity range comprises the following steps:
and controlling the humidity adjusting system to mix dry gas and saturated humidity gas at the same preset temperature according to a preset proportion to obtain constant humidity gas, so that the humidity is in the humidity range.
In a third aspect, the invention provides a sensor performance evaluation system comprising the above-mentioned device.
According to the sensor performance evaluation device, method and system provided by the invention, the sensor detects the environment meeting the preset detection condition to obtain the detection data, and the performance of the sensor is conveniently and comprehensively evaluated by comparing the detection data with the preset detection condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical inventions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts.
Fig. 1 is a schematic structural diagram of a sensor performance evaluation apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a sensor performance evaluation apparatus according to a second embodiment of the present invention;
fig. 3 is a schematic flow chart of a sensor performance evaluation method according to a third embodiment of the present invention;
fig. 4 is a schematic flow chart of a sensor performance evaluation method according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more apparent and understandable, the technical invention in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.
Implementation mode one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a sensor performance evaluation apparatus according to an embodiment of the present invention.
As shown in fig. 1, a first aspect of the present invention provides a sensor performance evaluation device including: a control system 1 and an environment setting system 2.
When the performance of the sensor 10 is tested, a performance test evaluation scheme is designed according to the performance technical index parameters of the sensor 10 to be tested, and the performance test evaluation scheme mainly comprises a value indicating error, repeatability, response time, environmental interference and other item test methods. The control system 1 is used for:
the environment setting system 2 is controlled to generate an environment satisfying a preset detection condition. The environment includes a detection object, temperature, humidity, etc., the detection object includes gas, liquid and solid and a combination of at least two, when the detection object includes gas and liquid, then the parameter data of the detection object includes gas/liquid components and component concentrations, and the physical state, the ph value, etc. of part of the detection object may change under the influence of the temperature and humidity, so that when designing the performance evaluation scheme of the sensor 10, it should be ensured that the generated environment is kept in a steady state. Because the environment needs a certain time to be generated, and part of the detection objects are physically adsorbed, the generated environment cannot meet the preset detection condition, and therefore, the control system 1 can control the environment setting system 2 to generate the environment meeting the preset detection condition by setting the feedback system 4. The preset detection conditions ensure that the generated environment is an accurate environment, i.e. that the parameters of the generated environment are exactly identical to the parameters input to the control system 1. Depending on the type of sensor 10, different environments may be provided, for example, the sensor 10 is a gas sensor, and the environment includes at least a gas detectable by the sensor 10. If the sensor 10 is a liquid sensor, then the environment includes at least a liquid that is detectable by the sensor 10.
For ease of explanation, the environment in the embodiments of the present invention relates to gas, temperature, humidity, and the like, and the sensor 10 is a gas sensor.
Detection data obtained by the sensor 10 detecting an environment satisfying a preset detection condition is acquired. Since the generated environment does not necessarily satisfy the preset detection condition within a certain time, that is, a stable environment has not been formed, or since a part of the detection object is physically adsorbed, the generated environment does not satisfy the preset detection condition. When the environment detected by the sensor 10 does not satisfy the preset detection condition, the performance of the sensor 10 cannot be evaluated by comparing the detected detection data with the preset detection condition. Therefore, the detection data obtained by the sensor 10 detecting the environment needs to be accurate and effective when the environment meets the preset detection condition.
Evaluation data for evaluating the performance of the sensor 10 is obtained from the detection data and the preset detection data. The detection data includes the components and component ratios of the detection object, and if the detection object is a gas or a liquid, the detection data includes the components and component concentrations of the gas or the liquid. The predetermined detection conditions include the components and component ratios of the analyte, and since the predetermined detection conditions satisfied by the generated environment are known, the performance of the sensor 10 can be preliminarily evaluated by comparing the differences between the components and component ratios of the analyte in the detection data and the components and component ratios of the analyte in the predetermined detection conditions. The evaluation data includes indication error, repeatability, response time, environmental disturbance stability, accuracy range, etc. of the sensor 10.
If the difference is smaller than the preset threshold, it can be determined that the performance of the sensor 10 is better, the indication error is small, and the accuracy is high. If the value is higher than the preset value, the performance of the sensor 10 is determined to be poor, the indicating value error is large, and the accuracy is low.
And controlling the sensor 10 to measure the same environment meeting the preset detection condition for multiple times, comparing to obtain whether the multiple detection data are the same or not, if so, determining that the repeatability of the sensor 10 is high, and if not, determining that the repeatability of the sensor 10 is low.
The response time from the start of the sensor 10 to the detection of the detected data is recorded, and if the response time is about short, it indicates that the sensitivity of the sensor 10 is higher.
After the detection data is obtained in the detection environment, factors which can interfere the performance of the sensor 10, such as physical and chemical interference factors like gas, liquid, solid, temperature, humidity, magnetic field, electric field and the like, can be added in or outside the detection environment, the detection data after interference is obtained by detecting the environment again, and if the difference value of the detection data before and after a plurality of interferences is small, the environmental interference stability of the sensor 10 is determined to be high, otherwise, the environmental interference stability is low.
Different environments can be generated by changing the preset detection conditions, so that the sensor 10 can obtain multiple sets of detection data, and therefore, the accuracy of the sensor 10 in what preset detection condition range is higher, and the accuracy of the sensor 10 in what preset detection condition range is lower can be judged.
In summary, the sensor 10 detects an environment satisfying a predetermined detection condition to obtain detection data, and compares the detection data with the predetermined detection condition to conveniently and comprehensively evaluate the performance of the sensor 10.
Second embodiment
Referring to fig. 2 based on the first embodiment, fig. 2 is a schematic structural diagram of a sensor performance evaluation apparatus according to a second embodiment of the present invention.
Further, as shown in fig. 2, the apparatus further comprises a laboratory box 3, and the environment setting system 2 generates an environment in the laboratory box 3. The generated environment does not necessarily satisfy the preset detection conditions, and needs to be accumulated for a certain time or adjusted by the feedback system 4 to satisfy the preset detection conditions.
Further, the apparatus further comprises a feedback system 4 for detecting the environment generated by the environment setting system 2 and obtaining feedback data. The feedback data includes parameter data of the detected object in the environment, temperature, humidity and the like.
The control system 1 is configured to obtain and obtain adjustment data according to feedback data and preset detection conditions, where the adjustment data includes parameter data, temperature, humidity, and the like of a detection object, and when the detection object is a fluid (i.e., gas and liquid), the adjustment data further includes a flow rate of the detection object, and the fluid concentration can be controlled through the flow rate. And controlling the environment setting system 2 to adjust the environment generated by the environment setting system 2 according to the adjustment data until the environment meets the preset detection condition.
Further, the preset detection condition includes parameter data of the detection object detected by the sensor, and the parameter data includes components and component ratios of the detection object. The environment setting system 2 includes a test object configuration system 21 for controlling the system 1 and generating test objects satisfying the parameter data.
Further, the analyte includes a gas, and the parameter data includes a gas component of the analyte and a gas concentration of each gas component, and preferably, a gas flow rate of the analyte. The detector deployment system 21 includes a multi-component dynamic gas distribution system and/or a liquid organic gas distribution system.
The multi-component dynamic gas distribution system and the liquid organic gas distribution system can both comprise at least two mass flow controllers for respectively introducing different raw material gases, and the liquid organic gas distribution system can also comprise a vaporization pool for vaporizing the raw material liquid. The multi-component dynamic gas distribution system and the liquid organic gas distribution system both regulate the gas components of the generated gas to be detected and the gas concentrations of the gas components by controlling the gas flow of the raw material gas (including the vaporized raw material liquid). Preferably, the gas flow rate of the raw gas is adjusted by a feedback system so that the gas to be measured becomes the standard gas.
Further, the preset detection condition includes a temperature range, the environment setting system 2 includes a temperature adjusting system 22, and the temperature adjusting system 22 includes a heating system, a cooling system, and a temperature detection system. The temperature detection system is used for detecting the temperature in the experiment box 3, and under the condition that the temperature is smaller than the lower temperature limit of the temperature range, the control system 1 starts the heating system to heat the interior of the experiment box 3 until the temperature is in the temperature range. In the case that the temperature is greater than the upper temperature limit of the temperature range, the control system 1 starts the refrigeration system to refrigerate the inside of the experimental box 3 until the temperature is within the temperature range. By controlling the temperature range, the physical state change and chemical reaction of the detection object are avoided.
Further, the preset detection condition comprises a humidity range, and the environment setting system 2 comprises a humidity adjusting system 23 for controlling the system 1 and enabling the humidity in the experiment box 3 to meet the preset detection condition. The control system 1 controls the humidity adjustment system 23 to mix the dry gas and the saturated humidity gas (i.e. the relative humidity is 100%) at the same preset temperature according to a preset ratio to obtain the constant humidity gas, so that the humidity is within the humidity range. By controlling the humidity range, the concentration, the pH value and the like of the detected object are prevented from changing.
Third embodiment
Referring to fig. 3, fig. 3 is a schematic flow chart of a method for evaluating performance of a sensor 10 according to a third embodiment of the present invention.
As shown in fig. 3, a second aspect of the present invention provides a method for evaluating performance of a sensor 10, the method including:
and S100, controlling the environment setting system 2 to generate an environment meeting preset detection conditions.
S200, acquiring detection data obtained by detecting the environment meeting the preset detection conditions by the sensor 10.
And S300, obtaining evaluation data for evaluating the performance of the sensor 10 according to the detection data and preset detection conditions.
Further, the method further comprises:
and S400, controlling the environment setting system 2 to generate an environment in the experiment box 3.
Embodiment IV
Referring to fig. 4, fig. 4 is a schematic flow chart of a performance evaluation method of a sensor 10 according to a fourth embodiment of the present invention.
Further, as shown in fig. 4, the method further includes:
and S500, controlling the feedback system 4 to detect the environment generated by the environment setting system 2 and obtain feedback data.
And S600, obtaining and obtaining adjusting data according to the feedback data and preset detection conditions.
And S700, controlling the environment setting system 2 to adjust the environment generated by the environment setting system 2 according to the adjustment data until the environment meets the preset detection condition.
Further, the preset detection condition includes parameter data of the detection object detected by the sensor, and the parameter data includes components and component ratios of the detection object. The environment setting system 2 includes the test object configuration system 21, and the step of controlling the environment setting system 2 to generate the environment satisfying the preset test condition in S100 includes:
and S110, controlling the detection object configuration system 21 to generate the detection object meeting the parameter data.
Further, the analyte includes a gas, and the parameter data includes a gas component of the analyte and a gas concentration of each gas component, and preferably, a gas flow rate of the analyte. The detector deployment system 21 includes a multi-component dynamic gas distribution system and/or a liquid organic gas distribution system.
Further, the preset detection condition includes a temperature range, the environment setting system 2 includes a temperature adjusting system 22, and the temperature adjusting system 22 includes a heating system, a cooling system, and a temperature detection system. The temperature detection system is used for detecting the temperature in the experiment box 3, and the step of controlling the environment setting system 2 to generate the environment meeting the preset detection condition in the step S100 comprises the following steps:
and S120, controlling the temperature regulating system 22 to enable the temperature in the experiment box 3 to meet the temperature range.
The step of controlling the temperature adjustment system 22 so that the temperature in the experimental box 3 satisfies the temperature range in S120 includes:
and S121, starting a heating system to heat the interior of the experiment box 3 until the temperature is within the temperature range under the condition that the temperature is less than the lower temperature limit of the temperature range.
And S122, starting a refrigerating system to refrigerate the interior of the experiment box 3 until the temperature is within the temperature range under the condition that the temperature is greater than the upper temperature limit of the temperature range.
Further, the preset detection condition includes a humidity range, the environment setting system 2 includes a humidity adjusting system 23, and the step of controlling the environment setting system 2 to generate the environment meeting the preset detection condition in S100 includes:
s130, controlling the humidity adjusting system 23 to enable the humidity in the experiment box 3 to meet the humidity range.
The step of controlling the humidity adjusting system 23 in S130 to make the humidity inside the experiment box 3 satisfy the preset detection condition includes:
s131, controlling the humidity adjusting system 23 to mix the dry gas and the saturated humidity gas at the same preset temperature according to a preset ratio to obtain a constant humidity gas, so that the humidity is within a humidity range.
Fifth embodiment
Based on the first to fourth embodiments, the invention firstly considers the influence of factors such as cross interference, corrosion, adsorption and the like among all components of mixed gas in the test environment of the sensor 10, develops the selection of the main body of the test device, namely the sensor 10 and relevant gas circuit materials and treatment processes, is made of 316 stainless steel or Monel alloy with excellent corrosion resistance and the like, can effectively prevent the corrosion of gases such as sulfur dioxide, hydrogen sulfide, ammonia and the like, and the surface of the material is subjected to surface treatment, so that the surface quality is improved, and the physical adsorption of gas molecules is greatly reduced, thereby meeting the requirements of different atmosphere environments.
Then, a high-precision mass flow controller is adopted, the flow of gas components and diluent gas in a certain proportion is strictly controlled and mixed to prepare standard gas, various standard gases with different component contents meeting requirements can be prepared on the same gas distribution device by using the method, eight groups of mass flow controllers are designed in a gas distribution system, the mass flow controllers can be diluted by more than 1000 times, and the real-time preparation of low-concentration, high-precision and multiple gas components can be realized.
Develop the design of atmospheric control system 1, temperature in the temperature probe real-time supervision box in through the internal air of experimental box 3, can set up the constant temperature range of thermostated container on control panel, set up the temperature upper limit and the lower limit that allow promptly, when the probe detects the temperature lower limit, open the air heater heating, the temperature begins to rise again, when the probe detects the temperature upper limit, opens the refrigeration compressor refrigeration, the temperature descends. Meanwhile, a set of humidity generator is designed by adopting a flow dividing method, dry air or nitrogen is used as an air source, and the air source is mixed with another strand of saturated moisture with a certain proportion (namely, the relative humidity is 100%) at the same temperature, so that the constant-humidity air flow with constant and continuously adjustable relative humidity can be obtained. By establishing a real-time temperature and humidity monitoring system, the temperature and the humidity of the system can be monitored, and the regulation and control of the environment temperature and the environment humidity can be completed according to different requirements.
And finally, monitoring various technical parameters of the experimental environment in real time through high-precision gas component concentration monitoring equipment and an environment monitoring system, uploading the technical parameters to a signal acquisition system, and completing automatic correction of indexes such as gas components, concentration, temperature and humidity through a design and development automatic control unit to realize dynamic regulation and control of the atmosphere environment.
Then, based on the testing device, different environmental condition parameters are set, technical indexes such as accuracy, consistency, stability and the like of the sensor 10 are tested and evaluated, test experiment data are uploaded through a signal acquisition system, and the data are analyzed and displayed through an information management system.
Compared with the prior art, the invention has the advantages that: (1) the surfaces of the device materials are passivated, so that the physical adsorption of gas molecules is greatly reduced, and the device can meet the requirements of different atmosphere environments. (2) The device can realize the real-time preparation of low concentration, high accuracy, many gas components, obtains the gas component that quality flow controller's quantity is more than, and the concentration can be accurate to ppb (part per billion) level. (3) The designed humidity generator realizes the preparation of standard gas under the influence of humidity conditions. (4) And realizing dynamic regulation and control of the atmosphere environment through high-precision gas component concentration monitoring equipment and environment monitoring. (5) The apparatus of the system design and the proposed method can be used for comprehensive testing and evaluation of the performance of the sensor 10.
The technical solutions of the present invention will be described in detail below in order to clearly understand the technical features, objects, and advantages of the present invention, but the present invention is not limited to the practical scope of the present invention. The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings.
The device mainly comprises a gas preparation system (comprising a multi-component dynamic gas distribution system and a liquid organic gas distribution system), a humidity adjusting system 23, a high-low temperature experiment box 3, a feedback system 4, a gas instrument detection platform, a control system 1 and the like.
When the performance of the sensor 10 is tested, a performance test evaluation scheme is designed according to the performance technical index parameters of the sensor 10 to be tested, and the performance test evaluation scheme mainly comprises a value indicating error, repeatability, response time, environmental interference and other item test methods. Firstly, selecting an environmental condition parameter (including gas component, concentration, temperature, humidity, etc.) and inputting the environmental condition parameter into the control system 1, completing automatic preparation of each gas component by the gas preparation system, simultaneously generating a constant humidity gas flow with constant and continuously adjustable relative humidity according to the parameter setting index by the humidity adjusting system 23, and completing temperature adjustment by the high-low temperature control box, thereby forming a relatively stable simulated atmosphere environment. Because the humiture influences the preparation of the standard gas, especially the humidity influences the acidic gas (such as hydrogen sulfide, sulfur dioxide, etc.) greatly, generally cause the actual preparation concentration to be lower than the theoretical concentration, at this moment, feedback data such as each component concentration and humiture in the experiment box 3 are monitored in real time through the feedback system 4, the feedback data are analyzed by the control system 1, the gas preparation system, the humidity adjusting system 23 and the high-low temperature experiment box 3 are automatically controlled through the control system 1, and each parameter such as the gas component, the concentration, the temperature and the humidity in the experiment box 3 meets the requirement required by the experiment. After the simulated atmosphere environment is stable, the detection data of the sensor 10 to be detected is read, and the control system 1 records the relevant data.
And modifying different experiment environment condition parameters, performing performance test experiments of the sensor 10 to be tested under different environment conditions according to the process, and evaluating the performances of the sensor 10 such as accuracy, consistency, stability and the like according to the technical indexes such as indication error, repeatability, response time, environmental interference and the like.
Sixth embodiment
Based on the first to fifth embodiments, the present invention will be further described with reference to the accompanying drawings and examples:
taking the test evaluation of the performance of one sensor 10 as an example, the performance technical index parameters of the sensor 10 are as follows: can detect five kinds of gaseous components of hydrogen sulfide, oxygen, methane, benzene, carbon monoxide simultaneously, and the detection range scope is respectively: hydrogen sulfide (0 to 100) mu mol/mol, methane (0 to 5)% mol/mol, carbon monoxide (0 to 500)% mol/mol, oxygen (0 to 30)% mol/mol, and benzene (0 to 10)% mol/mol. The indication error indexes are respectively as follows: hydrogen sulfide is not more than +/-5 mu mol/mol, methane is not more than +/-5% FS (percentage of precision and full scale), carbon monoxide is not more than +/-10%, oxygen is not more than +/-2% FS, and benzene is not more than +/-1 mu mol/mol. The temperature of the normal working environment is (-20-50) DEG C, and the humidity is (20-90)% RH (relative humidity).
(1) Firstly, the sensor 10 is placed on a gas instrument detection platform and connected with a signal acquisition system, so that normal data communication is ensured.
(2) One environmental condition parameter (including gas composition, concentration, temperature, humidity, etc.) is selected, such as: 20 mu mol/mol of hydrogen sulfide, 1% mol/mol of methane, 100 mu mol/mol of carbon monoxide, 10% mol/mol of oxygen and 2 mu mol/mol of benzene, wherein the balance gas is nitrogen, the temperature is set to be 20 ℃, the humidity is 50% RH, the balance gas is respectively input into the control system 1, and the simulation of the environmental conditions is completed by the multi-component dynamic dilution device, the liquid organic solvent dynamic distribution device, the high-low temperature control system 1 and the humidity generation device.
(3) The feedback system 4 monitors the concentration of each gas component in the experiment box 3 and the temperature and humidity parameter information in real time, analyzes the feedback data, and compensates each parameter through the control system 1, so that each environmental parameter in the experiment box 3 meets the requirement of the experiment.
(4) Various detection data of the sensor 10 under a specific environmental condition are collected to test and evaluate technical indexes such as indication error, repeatability, response time and the like of the sensor 10 under the environmental condition.
(5) Modifying environmental condition parameter settings, such as: the concentration and the temperature and humidity conditions of each gas component are changed, other interference gases are added, and the like, so that the device can form a target environment condition in a short time through the control system 1, and the performance test and evaluation of the sensor 10 under different environment conditions are completed.
According to the sensor performance evaluation device provided by the invention, the sensor 10 detects an environment meeting preset detection conditions to obtain detection data, and the performance of the sensor 10 is conveniently and comprehensively evaluated by comparing the detection data with the preset detection conditions.
In a third aspect, the invention provides a sensor performance evaluation system comprising the above-mentioned device. Preferably, the system further comprises a meter detection platform arranged within the laboratory box 3, the sensor 10 being adapted to be placed on the meter detection platform.
The working principle and the beneficial effect of the sensor performance evaluation method and the system provided by the second and third aspects of the invention are completely the same as those of the sensor performance evaluation device, and are not repeated herein.
According to the sensor performance evaluation device, method and system provided by the invention, the sensor detects the environment meeting the preset detection condition to obtain the detection data, and the performance of the sensor is conveniently and comprehensively evaluated by comparing the detection data with the preset detection condition.
In the above embodiments, the description of each embodiment has its own emphasis, and for parts not described in detail in a certain embodiment, reference may be made to the description of other embodiments. In view of the above description of the sensor performance evaluation method, device and system provided by the present invention, those skilled in the art will recognize that changes may be made in the embodiments and applications of the invention in light of the above description, and therefore the disclosure should not be construed as limiting the invention.
Claims (15)
1. A sensor performance evaluation apparatus, characterized by comprising: a control system and an environment setting system;
the control system is configured to:
controlling the environment setting system to generate an environment meeting preset detection conditions;
acquiring detection data obtained by detecting the environment meeting the preset detection condition by a sensor;
and obtaining evaluation data for evaluating the performance of the sensor according to the detection data and the preset detection condition.
2. The apparatus of claim 1, further comprising a laboratory box, wherein the environment setting system generates the environment within the laboratory box.
3. The apparatus of claim 2, further comprising a feedback system for detecting the environment generated by the environment setting system and obtaining feedback data; the control system is used for obtaining and obtaining adjusting data according to the feedback data and the preset detection condition, and controlling the environment setting system to adjust the environment generated by the environment setting system according to the adjusting data until the environment meets the preset detection condition.
4. The apparatus according to claim 3, wherein the preset detection condition includes parameter data of the detection object detected by the sensor, the parameter data including a component and a component ratio of the detection object; the environment setting system comprises a detection object configuration system, and the control system controls the detection object configuration system to generate the detection object meeting the parameter data.
5. The apparatus of claim 4, wherein the test object comprises a gas, the parameter data comprising a gas composition of the test object and a gas concentration of each gas composition; the detector configuration system comprises a multi-component dynamic gas distribution system and/or a liquid organic gas distribution system.
6. The apparatus of claim 2, wherein the preset detection condition comprises a temperature range, the environment setting system comprises a temperature regulation system comprising a heating system, a refrigeration system, and a temperature detection system; the temperature detection system is used for detecting the temperature in the experiment box, and under the condition that the temperature is less than the lower temperature limit of the temperature range, the control system starts the heating system to heat the interior of the experiment box until the temperature is within the temperature range; in the case that the temperature is greater than the upper temperature limit of the temperature range, the control system starts the refrigeration system to refrigerate the interior of the experimental box until the temperature is within the temperature range.
7. The apparatus of claim 2, wherein the preset detection condition comprises a humidity range, the environment setting system comprises a humidity adjusting system, and the control system controls the humidity adjusting system to make the humidity in the experimental box meet the humidity range; the control system controls the humidity adjusting system to mix dry gas and saturated humidity gas at the same preset temperature according to a preset proportion to obtain constant humidity gas, so that the humidity is within the humidity range.
8. A method of evaluating sensor performance, the method comprising:
controlling an environment setting system to generate an environment meeting preset detection conditions;
acquiring detection data obtained by detecting the environment meeting the preset detection condition by a sensor;
and obtaining evaluation data for evaluating the performance of the sensor according to the detection data and the preset detection condition.
9. The method of claim 8, further comprising:
and controlling the environment setting system to generate the environment in the experimental box.
10. The method of claim 9, further comprising:
the control feedback system detects the environment generated by the environment setting system and obtains feedback data;
acquiring and obtaining adjusting data according to the feedback data and the preset detection condition;
and controlling the environment setting system to adjust the environment generated by the environment setting system according to the adjusting data until the environment meets the preset detection condition.
11. The method of claim 10, wherein the preset detection condition includes parameter data of the detection object detected by the sensor, the parameter data including a component and a component ratio of the detection object; the environment setting system comprises a detection object configuration system, and the step of controlling the environment setting system to generate the environment meeting the preset detection condition comprises the following steps:
and controlling the detection object configuration system to generate the detection object meeting the parameter data.
12. The method of claim 11, wherein the test object comprises a gas, and the parametric data comprises a gas component of the test object and a gas concentration of each gas component; the detector configuration system comprises a multi-component dynamic gas distribution system and/or a liquid organic gas distribution system.
13. The method of claim 9, wherein the preset detection condition comprises a temperature range, the environment setting system comprises a temperature regulation system comprising a heating system, a refrigeration system, and a temperature detection system; the temperature detection system is used for detecting the temperature in the experimental box, and the step of controlling the environment setting system to generate the environment meeting the preset detection condition comprises the following steps:
in the case that the temperature is less than the lower temperature limit of the temperature range, starting the heating system to heat the interior of the experimental box until the temperature is within the temperature range;
and in the case that the temperature is greater than the upper temperature limit of the temperature range, starting the refrigeration system to refrigerate the interior of the experiment box until the temperature is within the temperature range.
14. The method of claim 9, wherein the preset detection condition comprises a humidity range, the environment setting system comprises a humidity adjustment system, and the step of controlling the environment setting system to generate an environment satisfying the preset detection condition comprises:
controlling the humidity adjusting system to enable the humidity in the experiment box to meet the humidity range;
the step of controlling the humidity adjusting system to enable the humidity in the experiment box to meet the humidity range comprises the following steps:
and controlling the humidity adjusting system to mix dry gas and saturated humidity gas at the same preset temperature according to a preset proportion to obtain constant humidity gas, so that the humidity is in the humidity range.
15. A sensor performance evaluation system comprising a device according to any one of claims 1-7.
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