Micro-current calibration device of negative air ion observation instrument

Abstract

The utility model belongs to the field of meteorological measurement, and relates to a micro-current calibration device of an air negative ion observation instrument, which comprises a standard micro-current generating device used for generating standard micro-current signals with different intensity grades (the standard micro-current signals can be traced to the international unit system); the device comprises a standard micro-current generating device, a probe which is connected with the standard micro-current generating device into a whole and is used for being connected with a negative ion observation instrument to be calibrated so as to input standard micro-current with different intensity grades output by the standard micro-current generating device into an acquisition board of the negative ion observation instrument, and a calculation unit which is used for calculating the standard micro-current with different intensity grades output by the standard micro-current generating device. And the standard micro-current generator is arranged in the standard micro-current generator and outputs a correction parameter for calibrating the output value of the negative ion observation instrument. Therefore, calibration of the negative ion observation instrument is realized. According to the utility model, a unified and traceable calibration method is provided for the negative ion observation instrument, the accuracy and comparability of observation data are improved, and the accuracy and reliability of observation results are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to meteorological measurement field especially, and it relates to a kind of micro-current calibration device of air negative ion observation instrument. BACKGROUND

[0002] Air negative ion is the general term of single gas molecule and light ion group with negative charge in atmosphere, can be adsorbed by pollution such as smoke, dust, bacteria, automobile exhaust, can effectively remove pollutants in air, reduce the harm of haze to human health. Research shows that small particle size air negative ion can penetrate the brain blood barrier of human body, has the effect of recuperation and health care to human body. It can improve and increase lung function, has good influence on nervous system, respiratory system, immune system etc. of human body, especially the influence on respiratory system is most remarkable, makes human body maintain good movement function, is beneficial to human health. Therefore, air negative ion is also known as "vitamin" in atmosphere, and is closely related to environmental meteorology, ecological meteorology, tourism meteorology and other disciplines. Negative ion concentration changes with geographical environment, weather condition, season etc., and there is great difference in atmospheric negative ion concentration in various environments, and air negative ion concentration observation has very important role in evaluating air quality, ecology, environmental and health influence, and has become the most concerned ecology and hotspot of government and social public.

[0003] On the market, many manufacturers measure the content (number concentration) of negative ion in air based on the principle of capacitive inhalation method. The main working principle of capacitive inhalation method is: load a certain amount of polarization voltage on the polarization plate (or called bias plate) of ion sensor (or called collection barrel, collection cylinder), and let the measured air pass through the sensor at a uniform speed. Specific small particle size negative ion in air is deflected under the action of electric field and is captured by the collection plate. Based on the collected negative ion charge quantity, the concentration value of negative ion can be calculated. However, capacitive inhalation method measures the weak current signal generated by air negative ion, and due to different ways, methods of signal acquisition, signal amplification and signal processing, the negative ion concentration given by instruments of different manufacturers is not the same, and there is great difference between measurement results, sometimes even reaching 1-2 orders of magnitude.

[0004] Due to lack of unified standard, there is no recognized calibration instrument in the industry at present, so it is impossible to determine whether the negative ion content measured by a certain instrument is accurate, thereby forming the situation that instrument manufacturers fight each other, and the difference between measurement results is large, which brings adverse effects to accurate measurement of negative ion concentration and scientific evaluation of climate, environment and health effects of negative ion. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of micro-current calibration device of air negative ion observation instrument to solve the technical problem of inaccurate negative ion concentration measurement.

[0006] To solve the above technical problems, the utility model provides a kind of micro-current calibration device of air negative ion observation instrument, the device includes:

[0007] Standard micro-current generating device that different intensity levels of standard micro-current signal (standard micro-current signal can be traced to international system of units) are continuously and stably generated;

[0008] The standard micro-current generating device is connected with the negative ion observation instrument to be calibrated by probe, and the different intensity levels of standard micro-current signal output by the standard micro-current generating device are input into the collection plate of the negative ion observation instrument to be calibrated, and standard micro-current measurement signal is measured by the negative ion observation instrument to be calibrated;

[0009] Calculation unit is placed in standard micro-current generating device, and receives different intensity levels of standard micro-current signal output by standard micro-current generating device and standard micro-current measurement signal measured by the negative ion observation instrument to be calibrated, and outputs a correction parameter of calibration negative ion observation instrument output value.

[0010] Preferably, the negative ion observation instrument to be calibrated converts micro-current into standard negative ion concentration according to correction parameter.

[0011] Preferably, the device further comprises:

[0012] External remote controller, the wireless signal of the external remote controller is connected with the standard micro-current generating device to carry out remote input operation signal to the standard micro-current generating device by the external remote controller.

[0013] Preferably, the negative ion observation instrument to be calibrated is used as standard transfer instrument after calibration by correction parameter to transfer calibrated negative ion concentration standard value.

[0014] Preferably, the probe is built-in with elastic material, so that the probe can be telescopic or universal movement.

[0015] Preferably, the standard micro-current generating device is integrally formed with the probe.

[0016] The utility model discloses a device includes standard microcurrent generating device, standard microcurrent generating device is used to produce different intensity grade standard microcurrent signal, the probe with standard microcurrent generating device is connected as a whole, is used to be connected with the negative ion observation instrument of calibration, to the different intensity grade standard microcurrent signal of standard microcurrent generating device output is inputed into the collection board of negative ion observation instrument, standard microcurrent signal is inputed into the collection board of the negative ion observation instrument of calibration of standard microcurrent signal through the telescopic probe of movable, realizes the measurement calibration to it. Provide the unified, traceable calibration method for negative ion observation, improve the accuracy, the comparability of observation data, improve the work efficiency, ensure the accurate reliable observation result. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the scheme of the utility model, the following will be a simple introduction to the drawings needed to be used in the description of the utility model, obviously, the drawings in the following description is some embodiments of the utility model, for those skilled in the art, without creative labor, can also obtain other drawings according to these drawings.

[0018] Figure 1 It is the module diagram of one embodiment of the microcurrent calibration device of air negative ion observation instrument.

[0019] Number, standard microcurrent generating device 110, negative ion observation instrument 120 of calibration, probe 130. DETAILED DESCRIPTION

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs; The terms used in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the utility model; The terms "include" and "have" in the specification and claims of the utility model and their any variants are intended to cover the non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the utility model or the above drawing description are used to distinguish different objects, not to describe a particular order.

[0021] In this paper, the "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the utility model. The phrase appears in the specification does not necessarily refer to the same embodiment, nor is it independent or alternative to other embodiments. The skilled person understands explicitly and implicitly that the embodiments described herein can be combined with other embodiments.

[0022] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme of the present application will be described clearly and completely below in conjunction with the drawings.

[0023] As shown in Figure 1 The module diagram of one embodiment of the micro-current calibration device of the air negative ion observation instrument according to the present application is shown. The micro-current calibration device of the air negative ion observation instrument comprises:

[0024] A standard micro-current generating device 110 for continuously and stably generating standard micro-current signals of different intensity levels (the standard micro-current signals can be traced to the International System of Units).

[0025] The standard micro-current generating device 110 is connected to the negative ion observation instrument 120 to be calibrated through a probe 130, the standard micro-current signals of different intensity levels output by the standard micro-current generating device 110 are input into the collection plate of the negative ion observation instrument 120 to be calibrated, and the standard micro-current measurement signals are measured by the negative ion observation instrument 120 to be calibrated; a calculation unit 140 (which can be designed to be placed in the standard micro-current generating device) receives the standard micro-current signals of different intensity levels output by the standard micro-current generating device 110 and the standard micro-current measurement signals measured by the negative ion observation instrument 120 to be calibrated, and outputs a correction parameter of the calibration negative ion observation instrument output value.

[0026] The negative ion observation instrument 120 to be calibrated is used to receive the standard micro-current signals and obtain the standard micro-current measurement signals after receiving and measuring the standard micro-current signals, the calculation unit 140 receives the standard micro-current signals of different intensity levels output by the standard micro-current generating device 110 and the standard micro-current measurement signals measured by the negative ion observation instrument 120 to be calibrated, then obtains a calibration equation based on the least square method fitting the standard micro-current signals and the standard micro-current measurement signals, calibrates the real-time micro-current measurement signals of the negative ion observation instrument based on the calibration equation, and converts the micro-current signals into negative ion concentration according to the sampling volume, basic charge capacity, etc., so as to realize the calibration of the negative ion observation instrument to be calibrated.

[0027] The probe 130 is integrated with the standard micro-current generating device 110 and is connected to the negative ion observation instrument 120 to be calibrated, and is used to input the standard micro-current signals of different intensity levels output by the standard micro-current generating device 110 into the collection plate of the negative ion observation instrument 120 to be calibrated.

[0028] The standard micro-current generating device 110 is traceable and can generate micro-current signals with different intensity levels. The standard micro-current generating device 110 can change the remote switching, time setting, zero calibration, and measurement and calibration mode switching of the standard micro-current signals with different intensity levels according to the received adjustment signal. The adjustment signal can be transmitted in a wired or wireless manner. When the adjustment signal is transmitted in a wireless manner, the device further includes an external remote controller. The remote controller is communicatively connected to the standard micro-current generating device 110 through a wireless signal module of the remote controller, so that the remote controller can send a remote control operation signal to the standard micro-current generating device 110. The standard micro-current generating device 110 receives the wireless control signal and adjusts the standard micro-current signals with different intensity levels during the generation of the standard micro-current signals. The standard micro-current generating device 110 can also switch between remote control, time setting, zero calibration, and measurement and calibration modes. The standard micro-current generating device 110 is used to generate standard micro-current signals with different intensity levels (the standard micro-current signals can be traced to the International System of Units).

[0029] The negative ion observation instrument 120 to be calibrated includes at least one negative ion observation instrument 120. The negative ion observation instrument 120 receives the standard micro-current signals and measures the standard micro-current signals to obtain standard micro-current measurement signals. The calculation unit 140 receives the standard micro-current signals with different intensity levels output by the standard micro-current generating device 110 and the standard micro-current measurement signals measured by the negative ion observation instrument 120 to be calibrated. Then, the calculation unit 140 fits the standard micro-current signals and the standard micro-current measurement signals to obtain a calibration equation. Based on the calibration equation, the calculation unit 140 calibrates the real-time micro-current measurement signals of the negative ion observation instrument 120 and converts the micro-current signals into negative ion concentrations according to the sampling volume and the basic charge amount. Specifically, the standard micro-current generating device 110 delivers the standard micro-current signals to the negative ion observation instrument 120 through the probe 130. The negative ion observation instrument 120 receives and measures the standard micro-current signals to obtain standard micro-current measurement signals. In one embodiment, the calculation unit 140 fits the standard micro-current signals and the standard micro-current measurement signals based on the least squares method to obtain a calibration equation. According to the calibration equation, the calculation unit 140 calibrates the real-time micro-current measurement signals of the negative ion observation instrument to obtain calibrated micro-current measurement signals of the negative ion observation instrument. Then, according to the sampling volume and the basic charge amount, the calculation unit 140 converts the calibrated micro-current measurement signals of the negative ion observation instrument 120 into negative ion concentrations.

[0030] The negative ion observation instrument 120 includes a plurality of ion sensors, which respectively receive standard micro-current signals and measure the standard micro-current signals to obtain standard micro-current measurement signals. In the present embodiment, when the multi-sensor negative ion observation instrument 120 is calibrated based on the micro-current method, each ion sensor needs to be calibrated respectively. The negative ion observation instrument 120 includes a plurality of ion sensors, which respectively detect the concentrations of positive and negative ions in the air. The plurality of ion sensors include at least three positive ion sensors and at least three negative ion sensors. The at least three positive ion sensors synchronously detect the concentration of positive ions in the air, and the at least three negative ion sensors synchronously detect the concentration of negative ions in the air. The standard micro-current measurement signals are obtained based on the measurement of the at least three positive ion concentrations and the at least three negative ion concentrations. The plurality of ion sensors can include any number of positive ion sensors among three, four, five, six, seven, eight, nine, ten, etc. natural numbers, and the plurality of ion sensors can include any number of negative ion sensors among three, four, five, six, seven, eight, nine, ten, etc. natural numbers. The number of positive ion sensors and negative ion sensors can be designed according to requirements. For each ion sensor of the plurality of ion sensors of the negative ion observation instrument 120, a calibration equation corresponding to each ion sensor is obtained based on the least square method fitting the standard micro-current signal of each ion sensor and a plurality of standard micro-current measurement signals corresponding to each ion sensor. When the negative ion observation instrument 120 with three positive ion sensors and three negative ion sensors is calibrated, the six ion sensors (including the three positive ion sensors and the three negative ion sensors) are calibrated respectively to obtain calibration equations corresponding to the six ion sensors. According to the calibration equation corresponding to each ion sensor, the measurement signal of each ion sensor is calibrated, and then the calibrated measurement signal of each ion sensor is converted into a positive ion concentration or a negative ion concentration. Finally, the average of the positive ion concentrations or the average of the negative ion concentrations is obtained after removing the obviously deviated values from the plurality of positive ion concentrations or negative ion concentrations.

[0031] After the number of positive and negative ions is measured, the standard micro-current signal of different intensity levels and the standard micro-current measurement signal are fitted by using the least square method to obtain a calibration equation; when the real-time micro-current measurement signal of the negative ion observation instrument is obtained, the real-time micro-current measurement signal of the negative ion observation instrument is calibrated according to the calibration equation to obtain the calibrated micro-current measurement signal of the negative ion observation instrument, and then the calibrated micro-current measurement signal of the negative ion observation instrument is converted into the negative ion concentration according to the sampling volume of the air and the electric quantity of the elementary charge, so that the accurate metrological calibration of the negative ion observation instrument is realized. The measurement data of the standard micro-current signal and the standard micro-current measurement signal are recorded, the quality control of the standard micro-current signal and the standard micro-current measurement signal is performed, and the optimal measurement data on the linearity are determined; the optimal measurement data partial derivative equations of the standard micro-current signal and the standard micro-current measurement signal are obtained based on the least square method; the optimal measurement data partial derivative equations of the standard micro-current signal and the standard micro-current measurement signal are fitted based on the linear relationship of the optimal measurement data of the standard micro-current signal and the standard micro-current measurement signal, and the calibration equation is obtained.

[0032] Preferably, the standard micro-current generating device 110 is integrally formed with the probe 130. It has the characteristics of small volume, light weight, easy to move and easy to operate, and can not be limited by the detection environment and geographical location.

[0033] The calibrated negative ion observation instrument is used as a standard transfer instrument to transfer the calibrated negative ion concentration standard value. The standard transfer instrument cooperates with the air negative ion generation and split calibration device to realize the metrological calibration of the same type of negative ion observation instrument.

[0034] The connection of the negative ion observation instrument 120 to be calibrated and the probe 130. The connection of the negative ion observation instrument 120 to be calibrated realizes the polarization voltage adjustment function of the negative ion observation instrument, adjusts the mobility of the negative ion observation instrument to be consistent with the mobility value of the negative ion observation instrument 120 to be calibrated (different observation instruments may have different ion mobilities, which means that the measurement results may be different), so as to realize the calibration of the negative ion observation instrument 120 to be calibrated.

[0035] By this method of multi-point linear fitting (least square method) to obtain the calibration equation, each observation instrument can be calibrated conveniently and quickly. The operation of the calculation unit is not the focus of the present application, and the least square method is a known technology, so it will not be described again.

[0036] The standard micro-current generated by the standard micro-current generating device 110 is input into the negative ion observation instrument 120 or the collection plate of the negative ion observation instrument through the movable telescopic probe 130, so as to realize the metrological calibration of the negative ion observation instrument.

[0037] Preferably, the device further comprises an external remote controller, and the wireless signal module of the external remote controller is connected with the standard micro-current generating device 110 in communication, so as to remotely input operation signals to the standard micro-current generating device 110 by the external remote controller. In order to facilitate operation, the wireless signal module of the external remote controller is connected with the standard micro-current generating device 110 in communication, so as to realize the remote switching of different intensity levels of micro-current, time setting, zero calibration, and switching of measurement and calibration modes.

[0038] In the embodiment, the device comprises a standard micro-current generating device 110, which is used to continuously and stably generate standard micro-current signals of different intensity levels; and a probe 130, which connects the standard micro-current generating device 110 and the negative ion observation instrument 120 to be calibrated as a whole, so as to input the standard micro-current signals of different intensity levels output by the standard micro-current generating device 110 into the collection plate of the negative ion observation instrument. The standard micro-current generated by the standard micro-current generating device 110 is input into the negative ion observation instrument 120 or the collection plate of the negative ion observation instrument through the movable telescopic probe 130, so as to realize the metrological calibration of the negative ion observation instrument. The standard transfer instrument for the negative ion observation provides a unified and traceable calibration method, improves the accuracy and reliability of the observation data, improves the work efficiency, and ensures the accuracy and reliability of the observation results.

[0039] Obviously, the above-described embodiments are only some embodiments of the present application, rather than all the embodiments. The preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some technical features. Any equivalent structure made by referring to the content of the present application specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A microcurrent calibration device for an air negative ion observation instrument, characterized in that, The device includes: A standard microcurrent generator that continuously and stably produces standard microcurrent signals of different intensity levels; A negative ion observation instrument to be calibrated, which measures the standard microcurrent measurement signals at different intensity levels; The probes of the standard microcurrent generator and the negative ion observation instrument to be calibrated are connected respectively. A calculation unit is used to receive standard microcurrent measurement signals of different intensity levels and to measure the standard microcurrent measurement signals of the negative ion observation instrument to be calibrated, and to output a correction parameter for calibrating the output value of the negative ion observation instrument.

2. The micro-current calibration device for the air negative ion observation instrument according to claim 1, characterized in that, The probe has a built-in elastic material, which allows it to extend, retract, or move in all directions.

3. The micro-current calibration device for the air negative ion observation instrument according to claim 1, characterized in that, Also includes: An external remote controller for remotely controlling the standard microcurrent generator.

4. The micro-current calibration device for the air negative ion observation instrument according to claim 1, characterized in that, The standard microcurrent generator is integrally formed with the probe.

5. The micro-current calibration device for the air negative ion observation instrument according to claim 1, characterized in that, The probe is provided with an elastic material that allows it to extend, retract, or move in all directions.

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