A negative oxygen ion concentration detection device and equipment

Abstract

The utility model discloses a kind of negative oxygen ion concentration detection devices and equipment, it is related to gas collection field, collector includes upper polarizing cover, lower polarizing plate and collection plate, for rectangular cavity, collection plate is set in rectangular cavity, upper polarizing cover constitutes the upper surface, left surface, right surface and rear surface of collector, lower polarizing plate constitutes lower surface, front surface as input, rear surface as output port;Fan controls air to be inhaled from the input port of the collector, and output from the output port;Detection module is connected with collection plate.In the circulation of fan under the action of gas in collector, negative ion in air hits upper polarizing cover and lower polarizing plate discharge, charge is conducted to collection plate electrode and forms self-discharge, and discharge signal is recorded, so that processor can measure the number and size of positive and negative ions in air.The air in the air inlet and the air outlet is wider, and the water vapor in the air is more easily evaporated.

Description

Technical Field

[0001] This utility model relates to the field of gas collection, and in particular to a negative oxygen ion concentration detection device and equipment. Background Technology

[0002] The negative ion detector's collector adopts a cylindrical or tubular structure, consisting of three concentric cylinders. The outer cylinder and inner shaft serve as electrodes. When air passes through the cylinders, ions collide with the cylinder body and shaft, generating a discharge. This discharge signal is recorded, allowing for the measurement of the quantity and size of positive and negative ions in the air. With air intake at one end and exhaust at the other, the air is drawn in by a fan and passes through a narrow, confined space at a constant speed. This makes it difficult for humidity to drop quickly enough, directly leading to large errors in test accuracy and even preventing further measurements. This limits its use in situations requiring long-term or continuous monitoring. Utility Model Content

[0003] The purpose of this invention is to provide a negative oxygen ion concentration detection device and equipment. Under the action of a fan, gas circulates within the collector. Negative ions in the air strike the upper polarization shield and lower polarization plate, causing discharge. The charge is conducted to the electrodes of the collecting plate, forming a self-discharge. The discharge signal is recorded, allowing the processor to measure the quantity and size of positive and negative ions in the air. By designing a rectangular cavity, the airflow paths at the inlet and outlet are wider, making it easier for water vapor in the air to evaporate.

[0004] To solve the above-mentioned technical problems, this utility model provides a negative oxygen ion concentration detection device, comprising:

[0005] A collector, comprising an upper polarization shield, a lower polarization plate, and a collection plate, wherein the collector is a rectangular cavity, the collection plate is disposed in the rectangular cavity, the upper polarization shield constitutes the upper surface, left surface, right surface, and rear surface of the collector, the lower polarization plate constitutes the lower surface of the collector, the front surface serves as the input port of the collector, and the rear surface serves as the output port of the collector;

[0006] A fan that controls air to be drawn in from the inlet of the collector and output from the outlet;

[0007] The detection module has its input end connected to the acquisition board in the collector and its output end connected to the processor. The detection module amplifies the current signal generated by negative oxygen ions with negative charges in the air, which is acquired by the acquisition board, and outputs it to the processor so that the processor can determine the number of negative oxygen ions in the air.

[0008] The processor.

[0009] On the other hand, the plane where the collecting plate is located is parallel to the plane where the lower polarization plate is located, the distance between the collecting plate and the upper and lower surfaces of the collector is equal, and the distance between the left end of the collecting plate and the left surface of the collector is equal to the distance between the right end of the collecting plate and the right surface of the collector.

[0010] On the other hand, the front surface of the collector is open, and the rear surface of the collector is provided with a predetermined number of through holes so that air flows in from the front surface and flows out from the through holes.

[0011] On the other hand, the first bracket, the second bracket, and the third bracket of the acquisition plate are also collected, and the lower polarization plate is disposed in the through holes corresponding to the first bracket, the second bracket, and the third bracket;

[0012] The first bracket, the second bracket, and the third bracket are respectively positioned on the lower polarization plate near the front surface and on the lower polarization plate near the rear surface. The first bracket, the second bracket, and the third bracket pass through the through hole and are connected to the detection module.

[0013] On the other hand, it also includes a housing with a power switch and a display screen;

[0014] The front and rear ends of the housing are provided with air vents. The collector, the fan and the detection module are disposed in the cavity formed by the housing. The collector is disposed at the front end of the housing and the fan is disposed at the rear end of the housing.

[0015] The power switch is connected to the collector, the fan, and the detection module, and is used to activate the collector, the fan, and the detection module when pressed.

[0016] The display screen is used to show the number of negative oxygen ions in the air.

[0017] On the other hand, it also includes flow guide columns and discharge circuits;

[0018] The two ends of the guide column are connected to both sides of the opening;

[0019] The guide column is also connected to the first end of the discharge circuit, and the second end of the discharge circuit is connected to the reference power supply for discharging the negative high voltage generated by the collector.

[0020] On the other hand, the detection module includes a conversion module, a first amplification module, a second amplification module, and a digital-to-analog converter;

[0021] The output of the collector is connected to the input of the conversion module, the output of the conversion module is connected to the input of the first amplification module, the output of the first amplification module and the output of the second amplification module are connected to the input of the digital-to-analog converter, and the output of the digital-to-analog converter is connected to the input of the processor.

[0022] The conversion module is used to convert the current detected by the collector into a voltage signal. The first amplification module is used to amplify the voltage signal once. The second amplification module is used to amplify the voltage signal a second time. The digital-to-analog converter is used to convert the voltage signal amplified twice into a digital signal and output it to the processor.

[0023] On the other hand, the first amplification module includes a range adjustment module and an operational amplifier;

[0024] The non-inverting input of the operational amplifier is connected to the output of the conversion module, the inverting input of the operational amplifier is connected to the reference power supply and the feedback of the range adjustment module, the output of the operational amplifier is connected to the input of the range adjustment module, and the output of the range adjustment module is connected to the input of the second amplification module.

[0025] The range adjustment module is used to adjust the amplification factor of the operational amplifier.

[0026] On the other hand, the range adjustment module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a first changeover switch, and a second changeover switch;

[0027] The output terminal of the operational amplifier is connected to the first terminal of the first resistor, the first terminal of the second resistor, the first terminal of the first changeover switch, and the first terminal of the second changeover switch, respectively. The second terminal of the first resistor is connected to the second terminal of the first capacitor, the second terminal of the second capacitor, the first terminal of the third resistor, and the second terminal of the first changeover switch. The second terminal of the second resistor is connected to the first terminal of the second capacitor. The second terminal of the second changeover switch is connected to the second terminal of the first capacitor, the second terminal of the third resistor, and the first terminal of the fourth resistor, respectively. The second terminal of the fourth resistor and the first terminal of the fifth resistor are both connected to the inverting input terminal of the operational amplifier. The second terminal of the fifth resistor is connected to a reference voltage. The control terminals of the first changeover switch and the second changeover switch are both connected to the processor.

[0028] The first and second switching switches are used to set their first and second terminals to a short circuit or an open circuit, so as to adjust the amplification factor of the operational amplifier.

[0029] To solve the above-mentioned technical problems, this utility model also provides a negative oxygen ion concentration detection device, including the above-mentioned negative oxygen ion concentration detection device, and also includes a charger;

[0030] The charger is used to charge the battery in the negative oxygen ion concentration detection device so that the battery can power the collector, fan, detection module and processor in the negative oxygen ion concentration detection device.

[0031] This utility model discloses a negative oxygen ion concentration detection device and equipment, relating to the field of gas collection. The collector includes an upper polarization cover, a lower polarization plate, and a collection plate, forming a rectangular cavity. The collection plate is disposed within the rectangular cavity. The upper polarization cover constitutes the upper, left, right, and rear surfaces of the collector, while the lower polarization plate constitutes the lower surface. The front surface serves as the input port, and the rear surface as the output port. A fan controls air to be drawn in through the input port and output through the output port. A detection module is connected to the collection plate. Under the action of the fan, gas circulates within the collector. Negative ions in the air strike the upper polarization cover and the lower polarization plate, causing discharge. The charge is conducted to the electrodes of the collection plate, forming a self-discharge. The discharge signal is recorded, allowing the processor to measure the quantity and size of positive and negative ions in the air. By designing the rectangular cavity, the airflow paths at the inlet and outlet are wider, making it easier for water vapor in the air to evaporate. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the structure of a negative oxygen ion concentration detection device provided by this utility model;

[0034] Figure 2 A schematic diagram of the collector and fan provided by this utility model;

[0035] Figure 3 A schematic diagram of the structure of a collector provided by this utility model;

[0036] Figure 4 A schematic diagram of another collector provided by this utility model;

[0037] Figure 5 A schematic diagram of another collector provided by this utility model;

[0038] Figure 6A schematic diagram of the structure of the outer shell provided by this utility model;

[0039] Figure 7 A schematic diagram of the structure of a conversion module and a first amplification module provided by this utility model;

[0040] Figure 8 A schematic diagram of the structure of a range adjustment module provided by this utility model;

[0041] Figure 9 A schematic diagram of the structure of the second amplification module and digital-to-analog converter provided by this utility model. Detailed Implementation

[0042] The core of this invention is to provide a negative oxygen ion concentration detection device and equipment. Under the action of a fan, gas circulates within the collector. Negative ions in the air strike the upper polarization shield and lower polarization plate, causing discharge. The charge is conducted to the electrodes of the collecting plate, forming a self-discharge. The discharge signal is recorded, allowing the processor to measure the quantity and size of positive and negative ions in the air. By designing a rectangular cavity, the airflow paths at the inlet and outlet are wider, making it easier for water vapor in the air to evaporate.

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0044] Figure 1 This is a schematic diagram of a negative oxygen ion concentration detection device provided by the present invention. The negative oxygen ion concentration detection device includes:

[0045] Collector 1 includes an upper polarization shield, a lower polarization plate, and a collection plate. Collector 1 is a rectangular cavity. The collection plate is set in the rectangular cavity. The upper polarization shield constitutes the upper surface, left surface, right surface, and rear surface of collector 1. The lower polarization plate constitutes the lower surface of collector 1. The front surface serves as the input port of collector 1, and the rear surface serves as the output port of collector 1.

[0046] Fan 2 controls air to be drawn in from the input port of collector 1 and output from the output port;

[0047] The detection module 3 has its input end connected to the acquisition board in the collector 1 and its output end connected to the processor 4. The current signal generated by the negatively charged oxygen ions in the air, which is acquired by the acquisition board, is amplified and output to the processor 4 so that the processor 4 can determine the number of negative oxygen ions in the air.

[0048] Processor 4.

[0049] The negative ion detector collector 1 adopts a cylindrical or tubular structure, consisting of three concentric cylinders. The outer cylinder and inner shaft serve as electrodes. When air passes through the cylinders, ions collide with the cylinder body and shaft, generating a discharge. The discharge signal is recorded, allowing for the measurement of the quantity and size of positive and negative ions in the air. With air intake at one end and exhaust at the other, the air is drawn in by the fan 2 and passes through the narrow, confined space at a constant speed. The humidity is difficult to decrease quickly enough, directly leading to large errors in test accuracy, and even making further measurements impossible. This limits its use in long-term or continuous monitoring applications.

[0050] After powering on, fan 2 starts working. Under the suction of fan 2, air carrying both positive and negative ions is drawn into negative ion collector 1 at a constant speed. Because a constant negative high voltage is applied between the collection plate and the polarization plate, the negatively charged negative ions deflect towards the collection plate under the influence of the constant polarization electric field. Negative ions with a mobility greater than or equal to the limiting mobility can be captured by the collection plate, transferring their charge to it. These negatively charged ions, as they deflect towards the collection plate and are adsorbed, generate a weak current signal. This signal, along with the sampled airflow, is processed by detection module 3 to calculate the concentration of negative ions in the air. The formula for calculating the number of negative ions per unit volume of air is: N = I / qva. Where: N is the number of negative ions per unit volume of air, expressed as ions / cm³. 3 I is the microammeter reading in A, q is the elementary charge (1.6 × 10⁻¹⁹ C), v is the sampling air velocity in cm / s, and a is the effective cross-sectional area of ​​the collecting plate in cm². 2 .

[0051] Figure 2 A schematic diagram of the collector and fan provided by this utility model;

[0052] Collector 1 and fan 2 are respectively located at one end and the other end of the negative oxygen ion concentration detection device, which is also the air inlet and outlet of the negative oxygen ion concentration detection device. The left and right surfaces of collector 1 are not ventilated. The rectangular collector 1 facilitates air circulation and is larger than a cylindrical air outlet, resulting in better ventilation. Gold plating is applied to the PCB substrate to cover the polarization plate, forming a single electrode with the polarization plate, arranged in a grid pattern to cover the entire inner wall collection surface of the polarization plate.

[0053] This application provides a negative oxygen ion concentration detection device and equipment, relating to the field of gas collection. The collector 1 includes an upper polarization shield, a lower polarization plate, and a collection plate, forming a rectangular cavity. The collection plate is disposed within the rectangular cavity. The upper polarization shield constitutes the upper, left, right, and rear surfaces of the collector 1, while the lower polarization plate constitutes the lower surface. The front surface serves as the input port, and the rear surface as the output port. A fan 2 controls air to be drawn in through the input port and output through the output port. A detection module 3 is connected to the collection plate. Under the action of the fan 2, gas circulates within the collector 1. Negative ions in the air strike the upper polarization shield and the lower polarization plate, causing discharge. The charge is conducted to the electrodes of the collection plate, forming a self-discharge. The discharge signal is recorded, allowing the processor 4 to measure the quantity and size of positive and negative ions in the air. By designing a rectangular cavity, the airflow paths at the inlet and outlet are wider, making it easier for water vapor in the air to evaporate.

[0054] Based on the above embodiments:

[0055] Figure 3 This is a schematic diagram of the structure of a collector provided by this utility model. Figure 4 This is a schematic diagram of another collector provided by this utility model. Figure 5 A schematic diagram of another collector provided by this utility model;

[0056] In some embodiments, the plane where the collecting plate is located is parallel to the plane where the lower polarization plate is located, the distance between the collecting plate and the upper and lower surfaces of the collector 1 is equal, and the distance between the left end of the collecting plate and the left surface of the collector 1 is equal to the distance between the right end of the collecting plate and the right surface of the collector 1.

[0057] Collector 1 consists of a rectangular cavity formed by the polarization plate and the area below the polarization plate. The left and right sides are connected and not ventilated, with an inlet and an outlet at the front and rear ends. A crossbeam is located at the center of the front end, connecting the left and right sides, and the rear end has three rows of through holes. The acquisition plate (also called the collection plate) is positioned at the center of the inner wall between the left and right sides, the crossbeam, and the three rows of through holes, equidistant from the upper and lower inner walls of the polarization plate. The manufacturing requirements and setup of the acquisition plate are closely related to the distance and parallelism around the polarization plate, laying the foundation for subsequent circuitry and data stability.

[0058] In some embodiments, the front surface of the collector 1 is open, and the rear surface of the collector 1 is provided with a predetermined number of through holes so that air flows in from the front surface and flows out from the through holes.

[0059] Setting through holes facilitates air circulation and avoids the impact of high humidity on measurement results. Specifically, negative oxygen ions flow from the air inlet at the front of the device, through the area between the upper and lower parts of the collector 1 (or sensor) and the polarization plate; then through the air outlet at the rear of the polarization plate, along the PCBA or PCB substrate to the air inlet of fan 2, where they are drawn in by fan 2 and discharged from the air outlet of fan 2.

[0060] In some embodiments, a first bracket 6, a second bracket 7, and a third bracket 8 are also collected, and a lower polarization plate is disposed in a through hole corresponding to the first bracket 6, the second bracket 7, and the third bracket 8.

[0061] The first bracket 6, the second bracket 7, and the third bracket 8 are respectively positioned on the side of the lower polarization plate near the front surface and on the side of the lower polarization plate near the rear surface. The first bracket 6, the second bracket 7, and the third bracket 8 pass through the through hole and are connected to the detection module 3.

[0062] The collecting plate (also known as the collecting plate) is located inside the polarization plate cavity, equidistant from the perimeter of the polarization plate, and horizontally parallel and equidistant on both the top and bottom surfaces. Specifically, the three pins on the collecting plate maintain a relatively consistent distance from the perimeter of the three vias under the polarization plate when passing through them; furthermore, the three vias under the polarization plate are connected to the internal cavity of the outer casing 11. The entire flat-plate collector 1 is designed with a square shape and compact internal structure. Furthermore, the three vias under the polarization plate ensure that even when measuring negative oxygen ions in humid air, the increased humidity is quickly dried by the suction of the fan 2, avoiding the defect of being unusable due to high humidity.

[0063] The air duct space of the cylindrical shaft collector 1 is relatively narrow, small and enclosed; once the humidity increases, the suction of the fan 2 cannot quickly remove it, and water mist or water droplets will accumulate, making it impossible to continue testing or change the accuracy.

[0064] Figure 6 A schematic diagram of the structure of the outer shell provided by this utility model;

[0065] In some embodiments, the system further includes a housing 11 on which a power switch 9 and a display screen 10 are disposed;

[0066] Air vents are provided at both the front and rear ends of the outer casing 11. The collector 1, fan 2 and detection module 3 are arranged in the cavity formed by the outer casing 11. The collector 1 is arranged at the front end of the outer casing 11 and the fan 2 is arranged at the rear end of the outer casing 11.

[0067] The power switch 9 is connected to the collector 1, the fan 2 and the detection module 3, and is used to start the collector 1, the fan 2 and the detection module 3 when it is pressed.

[0068] The display screen 10 is used to display the number of negative oxygen ions in the air.

[0069] Traditional detectors typically have both a power switch (9) and a manual zeroing button, meaning they have a separate zeroing button. This requires turning on the power switch (9) and then manually zeroing the device, which is cumbersome. This application, however, only features a TFT display screen (10) and a power switch (9) button. It is simple and convenient to use, requiring no manual switching of measurement ranges or manual zeroing. The front of the device is an air inlet, and the rear is an air outlet; with one inlet and one outlet, negative oxygen ions flow out horizontally and uniformly within the inner cavity of the main unit's casing (11).

[0070] In some embodiments, the system also includes a flow guide column 12 and a discharge circuit 13;

[0071] One end of the flow guide column 12 is located at the middle position on the left surface near the front surface, and the other end of the flow guide column 12 is located at the middle position on the right surface near the front surface.

[0072] The guide post 12 is also connected to the first end of the discharge circuit 13, and the second end of the discharge circuit 13 is connected to the reference power supply for discharging the negative high voltage generated by the collector 1.

[0073] A crossbeam guide column 12 is installed inside the air inlet of the polarization plate, connected to the left and right sides of the polarization plate. During operation, a negative high voltage is applied. Even if it is disturbed by the external electrostatic field, the variable static voltage is discharged through the release circuit. This neutralizes the stray charges in the airflow and prevents negative oxygen ions from being adsorbed on the inner wall of the air duct.

[0074] Figure 7 A schematic diagram of the structure of a conversion module and a first amplification module provided by this utility model;

[0075] In some embodiments, the detection module 3 includes a conversion module 31, a first amplification module 32, a second amplification module 33, and a digital-to-analog converter U9;

[0076] The output of collector 1 is connected to the input of conversion module 31, the output of conversion module 31 is connected to the input of first amplification module 32, the output of first amplification module 32 and the output of second amplification module 33 are connected to the input of digital-to-analog converter U9, and the output of digital-to-analog converter U9 is connected to the input of processor 4.

[0077] The conversion module 31 is used to convert the current detected by the collector 1 into a voltage signal. The first amplification module 32 is used to amplify the voltage signal once. The second amplification module 33 is used to amplify the voltage signal a second time. The digital-to-analog converter U9 is used to convert the voltage signal amplified a second time into a digital signal and output it to the processor 4.

[0078] The microcurrent of negative oxygen ions collected by collector 1 is converted into a microvoltage by conversion module 31. The first amplification module 32 detects and analyzes the voltage in the order from high (243 times) to low (2.43 times) by default. The amplified voltage signal is then sent to the second amplification module 33 for a second operational amplifier amplification until the full-scale amplitude is reached. The adjustable sliding resistor meets the requirements.

[0079] The amplified analog signal voltage is input to the digital-to-analog converter U9, processed, and output to the processor 4 as a digital signal that can be recognized. These digital signals correspond one-to-one with the micro-current, micro-voltage, or negative oxygen ion concentration value detected by the front end. By analyzing these digital signals, the processor 4 can determine whether the concentration of negative oxygen ions input to the sensor front end is high or low.

[0080] Figure 8 A schematic diagram of the structure of a range adjustment module provided by this utility model;

[0081] In some embodiments, the first amplification module 32 includes a range adjustment module and an operational amplifier;

[0082] The non-inverting input of the operational amplifier is connected to the output of the conversion module 31, the inverting input of the operational amplifier is connected to the reference power supply and the feedback of the range adjustment module, the output of the operational amplifier is connected to the input of the range adjustment module, and the output of the range adjustment module is connected to the input of the second amplification module 33.

[0083] The range adjustment module is used to adjust the amplification factor of the operational amplifier.

[0084] Furthermore, to improve the amplification factor, a range adjustment module is included. When different concentrations of negative oxygen ions enter, the system automatically identifies the appropriate range. Specifically, processor 4 issues commands based on the concentration value. When the range adjustment module adjusts the resistance value returned to the inverting input of the operational amplifier, it thereby adjusts the amplification factor of the operational amplifier.

[0085] In some embodiments, the range adjustment module includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a first changeover switch U12C, and a second changeover switch U12A.

[0086] The output terminal of the operational amplifier is connected to the first terminal of the first resistor R1, the first terminal of the second resistor R2, the first terminal of the first changeover switch U12C, and the first terminal of the second changeover switch U12A, respectively. The second terminal of the first resistor R1 is connected to the second terminal of the first capacitor C1, the second terminal of the second capacitor C2, the first terminal of the third resistor R3, and the second terminal of the first changeover switch U12C, respectively. The second terminal of the second resistor R2 is connected to the first terminal of the second capacitor C2, and the second terminal of the second changeover switch U12A is connected to the second terminal of the first capacitor C1, the second terminal of the third resistor R3, and the first terminal of the fourth resistor R4, respectively. The second terminal of the fourth resistor R4 and the first terminal of the fifth resistor R5 are both connected to the inverting input terminal of the operational amplifier. The second terminal of the fifth resistor R5 is connected to the reference voltage. The control terminals of the first changeover switch U12C and the second changeover switch U12A are both connected to the processor 4.

[0087] The first changeover switch U12C and the second changeover switch U12A are used to set their first and second terminals to a short circuit or an open circuit, so as to adjust the amplification factor of the operational amplifier.

[0088] Processor 4 outputs high or low level signals respectively. These signals are switched via a combination of resistors connected to the first switch U12C and the second switch U12A to achieve automatic range switching. Hi is the signal level applied to the first switch U12C, and Lo is the signal level applied to the second switch U12A. Both the first switch U12C and the second switch U12A are short-circuited when the signal is high and open-circuited when the signal is low.

[0089] Automatic range switching:

[0090] When Hi=0 (U12C open circuit) and Lo=0 (U12A open circuit), the circuit amplification factor of range A is: β=(R1+R3+R4) / R5 +1=243 dB;

[0091] When Hi=1 (U12C short-circuited) and Lo=0 (U12A open-circuited), the circuit amplification factor of range B is: β=(R3+R4) / R5+1=24.3 dB;

[0092] When Hi=0 (U12C open circuit) and Lo=1 (U12A short circuit), the circuit amplification factor of range C is: β=R4 / R5 +1=2.43 dB;

[0093] Figure 9 This is a schematic diagram of the structure of the second amplification module 33 and the digital-to-analog converter U9 provided by this utility model;

[0094] The second amplification module 33 outputs the amplified voltage to the digital-to-analog converter U9, which converts it into a digital signal and then outputs it to the processor 4.

[0095] The voltage signal is amplified by different factors by the automatic gear switching circuit; then filtered, and further amplified. The amplified analog voltage signal is converted into a digital signal by the digital-to-analog converter U9 and sent to the processor 4 for further analysis and processing. The data analyzed and calculated by the processor 4 is sent to the display screen 10 through the conversion board to display the final negative oxygen ion concentration value.

[0096] This application also provides a negative oxygen ion concentration detection device, including the above-mentioned negative oxygen ion concentration detection device, and also includes a charger;

[0097] The charger is used to charge the battery in the negative oxygen ion concentration detection device so that the battery can power the collector 1, fan 2, detection module 3 and processor 4 in the negative oxygen ion concentration detection device.

[0098] The charger boosts the voltage to charge the battery; the battery output voltage is then regulated to supply power to the circuit.

[0099] Please refer to the above embodiments for a description of the negative oxygen ion concentration detection device provided in this application, and it will not be repeated here.

[0100] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0101] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes said element.

[0102] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A negative oxygen ion concentration detection device, characterized in that, include: A collector, comprising an upper polarization shield, a lower polarization plate, and a collection plate, wherein the collector is a rectangular cavity, the collection plate is disposed in the rectangular cavity, the upper polarization shield constitutes the upper surface, left surface, right surface, and rear surface of the collector, the lower polarization plate constitutes the lower surface of the collector, the front surface serves as the input port of the collector, and the rear surface serves as the output port of the collector; A fan, used to control air to be drawn in from the inlet of the collector and output from the outlet; The detection module has its input end connected to the acquisition board in the collector and its output end connected to the processor. The detection module amplifies the current signal generated by negative oxygen ions with negative charges in the air, which is acquired by the acquisition board, and outputs it to the processor so that the processor can determine the number of negative oxygen ions in the air. The processor.

2. The negative oxygen ion concentration detection device as described in claim 1, characterized in that, The plane containing the collecting plate is parallel to the plane containing the lower polarization plate. The distance between the collecting plate and the upper and lower surfaces of the collector is equal. The distance between the left end of the collecting plate and the left surface of the collector is equal to the distance between the right end of the collecting plate and the right surface of the collector.

3. The negative oxygen ion concentration detection device as described in claim 1, characterized in that, The front surface of the collector is open, and the rear surface of the collector is provided with a predetermined number of through holes so that air flows in from the front surface and flows out through the through holes.

4. The negative oxygen ion concentration detection device as described in claim 1, characterized in that, The system also includes a first bracket, a second bracket, and a third bracket, with the lower polarization plate disposed in the corresponding through holes of the first bracket, the second bracket, and the third bracket. The first bracket, the second bracket, and the third bracket are respectively positioned on the lower polarization plate near the front surface and on the lower polarization plate near the rear surface. The first bracket, the second bracket, and the third bracket pass through the through hole and are connected to the detection module.

5. The negative oxygen ion concentration detection device as described in claim 1, characterized in that, It also includes a housing with a power switch and a display screen; The front and rear ends of the housing are provided with air vents. The collector, the fan and the detection module are disposed in the cavity formed by the housing. The collector is disposed at the front end of the housing and the fan is disposed at the rear end of the housing. The power switch is connected to the collector, the fan, and the detection module, and is used to activate the collector, the fan, and the detection module when pressed. The display screen is used to show the number of negative oxygen ions in the air.

6. The negative oxygen ion concentration detection device as described in claim 1, characterized in that, It also includes a flow guide column and a discharge circuit; The two ends of the guide column are connected to both sides of the opening; The guide column is also connected to the first end of the discharge circuit, and the second end of the discharge circuit is connected to the reference power supply for discharging the negative high voltage generated by the collector.

7. The negative oxygen ion concentration detection device according to any one of claims 1 to 6, characterized in that, The detection module includes a conversion module, a first amplification module, a second amplification module, and a digital-to-analog converter; The output of the collector is connected to the input of the conversion module, the output of the conversion module is connected to the input of the first amplification module, the output of the first amplification module and the output of the second amplification module are connected to the input of the digital-to-analog converter, and the output of the digital-to-analog converter is connected to the input of the processor. The conversion module is used to convert the current detected by the collector into a voltage signal. The first amplification module is used to amplify the voltage signal once. The second amplification module is used to amplify the voltage signal a second time. The digital-to-analog converter is used to convert the voltage signal amplified twice into a digital signal and output it to the processor.

8. The negative oxygen ion concentration detection device as described in claim 7, characterized in that, The first amplification module includes a range adjustment module and an operational amplifier; The non-inverting input of the operational amplifier is connected to the output of the conversion module, the inverting input of the operational amplifier is connected to the reference power supply and the feedback of the range adjustment module, the output of the operational amplifier is connected to the input of the range adjustment module, and the output of the range adjustment module is connected to the input of the second amplification module. The range adjustment module is used to adjust the amplification factor of the operational amplifier.

9. The negative oxygen ion concentration detection device as described in claim 8, characterized in that, The range adjustment module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a first changeover switch, and a second changeover switch; The output terminal of the operational amplifier is connected to the first terminal of the first resistor, the first terminal of the second resistor, the first terminal of the first changeover switch, and the first terminal of the second changeover switch, respectively. The second terminal of the first resistor is connected to the second terminal of the first capacitor, the second terminal of the second capacitor, the first terminal of the third resistor, and the second terminal of the first changeover switch. The second terminal of the second resistor is connected to the first terminal of the second capacitor. The second terminal of the second changeover switch is connected to the second terminal of the first capacitor, the second terminal of the third resistor, and the first terminal of the fourth resistor, respectively. The second terminal of the fourth resistor and the first terminal of the fifth resistor are both connected to the inverting input terminal of the operational amplifier. The second terminal of the fifth resistor is connected to a reference voltage. The control terminals of the first changeover switch and the second changeover switch are both connected to the processor. The first and second switching switches are used to set their first and second terminals to a short circuit or an open circuit, so as to adjust the amplification factor of the operational amplifier.

10. A negative oxygen ion concentration detection device, characterized in that, The device includes the negative oxygen ion concentration detection device as described in any one of claims 1 to 9, and also includes a charger; The charger is used to charge the battery in the negative oxygen ion concentration detection device so that the battery can power the collector, fan, detection module and processor in the negative oxygen ion concentration detection device.

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