Ionization device performance detection apparatus

Abstract

The embodiment of the application discloses an ionization equipment performance detection device. The device comprises a capacitor, a detection plate, a current detection module and a high-voltage generator. The capacitor comprises a first plate and a second plate arranged in parallel. The detection plate is connected in series with the first plate and has the same electric potential. The detection plate is used for receiving ion flow generated by a measured ionization equipment. The current detection module is connected with the first plate and the detection plate respectively. The current detection module is used for measuring current generated by the ion flow received by the detection plate. One end of the high-voltage generator is connected with the first plate, and the other end is connected with the second plate and grounded. The control module is connected with the current detection module and the high-voltage generator respectively. The control module is configured to control and adjust a target voltage output by the high-voltage generator according to the current measured by the current detection module, and determine a performance parameter of the measured ionization equipment. Through the embodiment of the application, the technical problem of how to improve detection accuracy is solved.

Description

Technical Field

[0001] This application relates to the field of electronic testing equipment technology, and in particular to a device for testing the performance of ionization equipment. Background Technology

[0002] Ionization equipment is a core technology for electrostatic discharge (ESD) protection in modern industry. Its core mechanism involves ionizing air molecules through high-voltage corona discharge, generating equal flows of positive and negative ions. These ions are then precisely guided to the surface of charged objects using an airflow transport system. Based on the physical principle that opposite charges attract, the static charge accumulated on the object's surface is neutralized by ions of opposite polarity, thus rapidly eliminating the hazards of static electricity.

[0003] The performance parameters of ionization equipment (such as discharge time and equilibrium voltage) can drift due to electrode aging or environmental changes, leading to electrostatic discharge (ESD) protection failure. In industrial settings, equipment performance degradation can cause excessive particulate contamination or process malfunctions; therefore, performance testing of ionization equipment is particularly important. Existing ionization equipment performance testing devices are susceptible to voltage (charge) dissipation or attenuation caused by factors outside the ionization equipment itself, such as leakage current in the testing circuitry, resulting in inaccurate performance measurements of the ionization equipment. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an ionization equipment performance testing device to solve the technical problem of how to improve testing accuracy.

[0005] This application provides a device for testing the performance of ionization equipment, comprising: A capacitor includes a first plate and a second plate arranged in parallel. A detection plate is connected in series with the first electrode plate and has the same potential. The detection plate is used to receive the ion flow generated by the ionization device under test. A current detection module is connected to the first electrode plate and the detection plate respectively. The current detection module is used to measure the first current generated by the ion flow received by the detection plate and determine the second current corresponding to the capacitor based on the first current. A high-voltage generator, with one end connected to the first electrode plate and the other end grounded together with the second electrode plate, is used to provide voltage to the capacitor; The control module is connected to both the current detection module and the high-voltage generator, and is configured as follows: The average current within the current preset sampling period is calculated based on the second current measured by the current detection module. The voltage change value of the capacitor corresponding to the current preset sampling period is calculated based on the average current within the current preset sampling period, the duration of the preset sampling period, and the capacitance value of the capacitor. Based on the voltage change value corresponding to the current preset sampling period and the current voltage provided by the high voltage generator to the capacitor in the current preset sampling period, the target voltage that the high voltage generator needs to provide to the capacitor in the next preset sampling period is calculated, and the high voltage generator is controlled to output the target voltage in the next preset sampling period; Multiple sampling cycles are cyclically performed, and a voltage change curve over time is generated based on the voltage output of the high voltage generator to the capacitor and the preset sampling cycle for each preset sampling cycle. The performance parameters of the ionization device under test are determined based on the voltage change curve over time.

[0006] In at least some embodiments of this application, the control module is configured to: The amount of charge arriving at the detection plate during the current preset sampling period is calculated based on the average current during the current preset sampling period and the duration of the preset sampling period. The voltage change value of the detection plate corresponding to the current preset sampling period is calculated based on the amount of charge arriving at the detection plate within the current preset sampling period and the capacitance value of the capacitor. The control module is also configured to: Based on the difference between the current voltage supplied by the high-voltage generator to the capacitor in the current preset sampling period and the voltage change value of the detection plate corresponding to the current preset sampling period, the target voltage that the high-voltage generator needs to supply to the capacitor in the next preset sampling period is calculated.

[0007] In at least some embodiments of this application, Based on the time corresponding to the first drop of the voltage to the preset decay voltage value in the voltage-time curve, the power elimination time of the tested ionization device is obtained. The equilibrium voltage of the ionization device under test is obtained based on the maximum absolute value of the voltage in the portion of the curve after the extinction time in the voltage-time curve.

[0008] In at least some embodiments of this application, a first insulating support is provided between the first electrode plate and the second electrode plate; A second insulating support is provided on the side of the first electrode plate away from the second electrode plate; the detection plate is disposed on the second insulating support. The first electrode plate, the second electrode plate, and the detection plate are of the same size; The first electrode plate, the second electrode plate, and the detection plate have rough surfaces or their surfaces are coated with a thin film.

[0009] In at least some embodiments of this application, the first insulating support is columnar, and the area of ​​the cross-section of the first insulating support perpendicular to the axial direction is smaller than the area of ​​the first electrode plate. The second insulating support is plate-shaped, and the area of ​​the second insulating support is the same as the area of ​​the detection plate. The second insulating support is provided with a mounting portion protruding from the surface, and the mounting portion is positioned relative to the detection plate. The mounting portion is positioned close to and around the edge of the second insulating support.

[0010] In at least some embodiments of this application, the current detection module includes a sampling resistor, an operational amplifier, and an ADC analog-to-digital converter connected in sequence; the sampling resistor is connected to the detection plate and the first electrode plate, and the ADC analog-to-digital converter is connected to the control module.

[0011] In at least some embodiments of this application, the high-voltage generator is further configured to apply a preset detection voltage to the first electrode plate before the device detects the ionization device under test; The current detection module is also used to measure the current value on the first electrode plate under the preset voltage; The control module is also used to determine whether the insulation level between the first electrode plate and the second electrode plate meets the detection requirements based on the current value on the first electrode plate. If it is determined that the detection requirements are met, the control module controls the ionization equipment performance testing device to start the detection function.

[0012] In at least some embodiments of this application, the device further includes a temperature and humidity sensor, which is connected to the control module; The control module is also used to acquire the ambient temperature and humidity corresponding to the performance parameter test results of each tested ionization device via the temperature and humidity sensor; and / or, The control module is also used to correct the performance parameters of the ionization device under test based on the ambient temperature and humidity measured by the temperature and humidity sensor; and / or, The control module is also used to control the ionization equipment performance testing device to start the detection function when the ambient temperature and humidity measured by the temperature and humidity sensor meet the preset values.

[0013] In at least some embodiments of this application, the device further includes a display connected to the control module; the display is used to display the performance parameters of the ionization device under test and the ambient temperature and humidity measured by the temperature and humidity sensor. In at least some embodiments of this application, the capacitance value of the capacitor is 20pF±2pF.

[0014] The above-described one or more embodiments of this application have at least one or more of the following beneficial effects: This application, by setting up a detection plate structure, can effectively prevent voltage drop caused by leakage charge between the plates after the capacitor is charged, thereby more accurately measuring the current generated by the ionization device under test and improving the detection accuracy of the entire performance testing device. Simultaneously, because the detection plate connected to the current detection module and the first plate are at the same potential, and the capacitor voltage is controlled and stabilized by a high-voltage generator, it is unaffected by external factors other than the ionization device under test or the structural circuitry of the testing device itself, making the detection results more stable, accurate, and reliable.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein: Figure 1 This is a schematic diagram of the structure of an ionization equipment performance testing device according to one embodiment of this application; Figure 2 This is a schematic diagram of the test voltage changing over time according to one embodiment of this application; Figure 3 This is a schematic diagram of the mechanical structure of the capacitor and detection plate according to one embodiment of this application; Figure 4 This is a schematic diagram of the circuit principle structure of a current detection module according to one embodiment of this application; Figure 5 This is a schematic diagram of the circuit principle structure of an ionization device performance testing device according to one embodiment of this application; The markings in the diagram are as follows: 100, capacitor; 101, first electrode plate; 102, second electrode plate; 103, first insulating support; 200, detection plate; 201, second insulating support; 202, mounting part; 300, current detection module; 400, high voltage generator; 500, control module. Detailed Implementation

[0017] Some embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0018] As described in the background section, ionization equipment generates an ion stream to neutralize static electricity on the surface of an object. The detection principle of ionization performance testing devices is to simulate a charged object (i.e., the target to be neutralized, the device being neutralized) and measure the neutralization performance of the ionization equipment by detecting the effect of the ionization equipment on the charge of the target. This requires that the charge of the target be completely dissipated or attenuated by the ionization equipment for accurate and reliable test results. However, due to factors such as temperature and humidity changes, airflow disturbances, and the components of the testing device itself, the charge of the target may naturally dissipate or attenuate, resulting in changes in surface charge not being entirely caused by the ionization equipment, thus leading to inaccurate performance test results for the ionization equipment.

[0019] Based on this, this application provides an ionization device performance testing apparatus, which aims to ensure that the charge of the ionization target is only affected by the ionization device and is not interfered with by other external factors or the components of the testing apparatus itself, thereby improving the accuracy and reliability of the test.

[0020] See appendix Figure 1 In one or more embodiments, an ionization device performance testing apparatus of this application includes: The capacitor 100 includes a first plate 101 and a second plate 102 arranged in parallel. The detection plate 200 is connected in series with the first electrode plate 101 and has the same potential. The detection plate 200 is used to receive the ion flow generated by the ionization device under test. The current detection module 300 is connected to the first electrode plate 101 and the detection plate 200 respectively. The current detection module 300 is used to measure the first current generated by the ion flow received by the detection plate 200 and determine the second current corresponding to the capacitor 100 based on the first current. The high voltage generator 400 has one end connected to the first plate 101 and the other end connected to the second plate 102 and grounded. The high voltage generator 400 is used to provide voltage to the capacitor 100. Control module 500 is connected to current detection module 300 and high voltage generator 400 respectively. Control module 500 is configured as follows: The average current within the current preset sampling period is calculated based on the second current measured by the current detection module 300. The voltage change value of capacitor 100 corresponding to the current preset sampling period is calculated based on the average current within the current preset sampling period, the duration of the preset sampling period, and the capacitance value of capacitor 100. Based on the voltage change value corresponding to the current preset sampling period and the current voltage provided by the high voltage generator 400 to the capacitor 100 in the current preset sampling period, the target voltage that the high voltage generator 400 needs to provide to the capacitor 100 in the next preset sampling period is calculated, and the high voltage generator 400 is controlled to output the target voltage in the next preset sampling period. Multiple sampling cycles are cyclically performed, and a voltage-time variation curve is generated based on the voltage output of the high voltage generator 400 to the capacitor 100 in each preset sampling cycle and the preset sampling cycle. The performance parameters of the ionization device under test are determined based on the voltage-time variation curve.

[0021] Among them, the performance parameters of the ionization device under test include at least the power dissipation time and the balance voltage.

[0022] Based on the above embodiments, one possible working process of an ionization equipment performance testing device according to this application is as follows: The control module 500 controls the high voltage generator 400 to apply an initial voltage U0 (typically + / - 1000V) to the capacitor 100; wherein, the capacitor 100 is a simulated current elimination target. Since the first plate 101 and the detection plate 200 have the same potential, the voltage applied by the high voltage generator 400 to the first plate 101 is equivalent to the voltage applied to the detection plate 200. Therefore, the detection plate 200 and the capacitor 100 constitute a new simulated current elimination target, and the detection plate 200 is the detection object. The detection plate 200 receives the ion flow generated by the ionization device under test. The current detection module 300 calculates the first current generated by the ion flow. Since the detection plate 200 is connected in series with the first electrode 101, the first current generated on the detection plate 200 is equal to the second current of the capacitor 100. During the test, the control module 500 reads the current from the current detection module 300 and sets the sampling period. t; The average current flow I1 during the first sampling period on the detection plate 200 is calculated based on the read current. The sampling period is calculated based on the average current I1. The amount of charge Q1 = I1 that reaches the detection plate 200 within t. t, thus obtaining the voltage change of the first detection plate 200: U1 = Q1 / C, where C is the capacitance of capacitor 100; Control the target voltage output by the high voltage generator 400 to the capacitor 100 in the next preset sampling period, until U1 = U0 + U1; and record the voltage and time; After repeating the above sampling and calculation process, the target voltage output by the high-voltage generator 400 to the capacitor 100 for each sampling period can be obtained, thus obtaining the plate voltage-time sequence (U). i ,t i Store the data and plot the voltage-time curve, referencing... Figure 2 ; Through the curve of voltage and time (U) i ,t i The figure shows the performance parameters of the ionization device under test: the time when the voltage U(i) first drops to the set voltage, such as + / -100V or the test duration limit, i.e., the power exhaust time t. 消电 ;(U i ,t i The figure shows the time after the power dissipation period (t). i >t 消电 The maximum absolute value of the voltage in the voltage-time curve is the equilibrium voltage U. 平衡 .

[0023] The control module 500 not only controls the high voltage generator 400 to adjust the voltage when the sampling period is switched, but also continuously samples and calibrates the output voltage of the high voltage generator 400 within a single sampling period, so as to maintain the voltage of the capacitor 100 and the detection plate 200 within a sampling period.

[0024] This application, by setting the detection plate 200 structure, can effectively prevent the voltage drop caused by leakage charge between the plates of the capacitor 100 after charging (which can be understood as eliminating the leakage charge problem caused by the components of the device itself), thereby more accurately measuring the current generated by the ionization device under test and improving the detection accuracy of the entire performance testing device. At the same time, since the detection plate 200 connected to the current detection module 300 and the first plate 101 are at the same potential, and the voltage of the capacitor 100 is controlled and stabilized by the high voltage generator 400, it is not affected by external factors other than the ionization device under test or the structural circuit of the testing device itself. It always maintains the target voltage value before being ionized by the device, thus making the detection results more stable, accurate and reliable.

[0025] In one embodiment, reference Figure 3 A first insulating support 103 is provided between the first electrode plate 101 and the second electrode plate 102. The function of the first insulating support 103 is to support the assembly of the first electrode plate 101 and the second electrode plate 102 so that the first electrode plate 101 and the second electrode plate 102 form a capacitor 100. A second insulating support 201 is provided on the side of the first electrode plate 101 away from the second electrode plate 102. A detection plate 200 is provided on the second insulating support 201 and is electrically connected to the first electrode plate 101. The second insulating support 201 is used to support the installation of the detection plate 200.

[0026] In one possible implementation, the first electrode 101, the second electrode 102, and the detection plate 200 are all the same size. For example, they are all 15x15cm metal plates. The detection plate 200 is the same size as the first electrode 101, which facilitates installation and keeps the parameters consistent with the first electrode 101. This makes it easier to achieve the same potential and completely simulate the effect of replacing the first electrode 101, thus improving detection accuracy.

[0027] In one possible implementation, the first insulating support 103 is columnar, and the area of ​​the cross-section of the first insulating support 103 perpendicular to the axial direction is smaller than the area of ​​the first electrode plate 101. This ensures the installation function while not affecting the normal use of the capacitor 100 and minimizing the leakage current caused by the first insulating support 103. The second insulating support 201 is plate-shaped, and the area of ​​the second insulating support 201 is the same as the area of ​​the detection plate 200. This ensures the installation support function of the detection plate 200 while filling the space between the detection plate 200 and the first electrode plate 101 as much as possible. This prevents short circuits between the detection plate 200 and the first electrode plate 101 due to impurities, ensuring that the electric field between the two electrodes is zero everywhere and that no potential difference is generated.

[0028] In one possible implementation, the second insulating support 201 has a mounting portion 202 protruding from its surface, which is positioned relative to the detection plate 200. The mounting portion 202 is located close to and surrounds the edge of the second insulating support 201. The detection plate 200 is mounted on the second insulating support 201 via the mounting portion 202. While providing a stable mounting, the protrusion also acts as a buffer, preventing the detection plate 200 from deforming and being damaged due to overtightening of fasteners such as mounting screws. Furthermore, the detection plate 200 can be mounted on the second insulating support 201 via threaded connection, snap-fit, or other methods. The first electrode plate 101 and the second electrode plate 102 can be connected to the first insulating support 103 via snap-fit, interference fit, or other methods. The specific connection method is not limited, but it should be noted that the connecting parts must be made of insulating material to prevent leakage or the formation of a potential difference.

[0029] The capacitor has a capacitance of 20pF ± 2pF. In this application, capacitor 100 simulates the capacitance formed by various objects requiring static electricity elimination in daily life and production, along with other objects (such as the ground). Since the capacitance formed by most of these objects and other objects (such as the ground) is around 20pF, a 15x15cm, 20pF metal parallel-plate capacitor is used in the device. In actual use, different plate sizes and capacitance values ​​simulate the voltage change curves of different objects being statically eliminated in daily life and production, and the final test results may differ. A capacitor of the appropriate specification can be selected according to actual testing requirements. However, capacitors of different specifications used in the technical solution of this application are still within the technical solution of this application and should be protected within the scope of this application.

[0030] In one possible implementation, the two plates of capacitor 100 and the detection plate 200 are made of metallic materials with good conductivity and chemical stability. Good conductivity ensures that the charge can be rapidly and stably conducted after the ion current reaches the detection plate 200, guaranteeing measurement accuracy. Chemical stability ensures that the two plates of capacitor 100 and the detection plate 200 will not be affected by chemical reactions under different operating environments, thus maintaining their performance and measurement results. Furthermore, the surfaces of the two plates of capacitor 100 and the detection plate 200 are treated to enhance the ion current reception efficiency. For example, nanoscale roughening treatment can be used; or a special thin film can be deposited, such as an active nano / porous noble metal film, a transition metal compound film with defects / specific structures, an amorphous alloy film, a carbon-based composite film, a bimetallic / multimetallic alloy, or a core-shell film. This increases the active sites on the surfaces of the two plates of capacitor 100 and the detection plate 200, making it easier for ions to adhere to the detection plate 200, thereby enhancing the ion current reception efficiency and further improving the accuracy of the evaluation.

[0031] In one embodiment, reference Figure 4The current detection module 300 includes a sampling resistor, an operational amplifier, and an ADC (Analog-to-Digital Converter) connected in sequence. The sampling resistor connects the detection plate 200 and the first electrode 101, and the ADC connects to the control module 500. Specifically, the sampling resistor connects to the detection plate 200. After the detection plate 200 receives the ion current from the ionization device being measured, a current is formed due to charge movement. The sampling resistor converts this current into a small differential voltage (Ohm's Law), which reflects the magnitude and direction of the measured current. The operational amplifier amplifies this small differential voltage and outputs an amplified analog voltage signal to the ADC. The ADC converts the conditioned analog voltage signal output by the operational amplifier into a digital signal (binary code), so that the control module 500 can obtain the current value through this digital signal for processing, display, storage, or control. Simultaneously, the sampling resistor connected to the first electrode 101 can sample the current of the capacitor 100. The transmission process is the same as that from the sampling resistor to the control module 500, and will not be repeated here.

[0032] In one embodiment, the high-voltage generator 400 can be a high-precision controllable positive and negative high-voltage generator 400, which can meet the voltage regulation and output of ±1KV. The purpose of controlling and adjusting the output voltage and polarity of the high-voltage generator 400 by the control module 500 is to make the voltage change over time of the detection plate 200 and capacitor 100 simulate the process of eliminating static electricity from a charged object.

[0033] In one embodiment, capacitor 100 is a key detection component of the ionization device, and ideally, the two plates should be completely insulated. However, due to the surface resistance of the dielectric between the two plates, complete insulation is practically impossible. Before use, the detection device of this application can determine the degree of insulation between the plates of capacitor 100 through the cooperation of its components. The detection of the ionization device is only initiated when the insulation level is high. This can be understood as the detection device being activated only after the insulation level meets the detection requirements, ensuring the normal operation of the detection device and the accuracy of the measurement results.

[0034] Specifically, in the environment where the ionization equipment is operating, a preset constant high voltage is applied to the first plate 101 of the capacitor 100 by the high voltage generator 400; since one end of the current detection module 300 is connected to the first plate 101, the current detection module 300 can measure the current value on the first plate 101 under the constant high voltage; the control module 500 reads the current value measured by the current detection module 300 at this time, and uses this to determine the degree of insulation between the two plates of the capacitor 100. The specific insulation level requirements can be set according to actual testing requirements or standards. For example, if the current measured by the current detection module 300 is zero, the two plates can be considered completely insulated (ideal state), the testing device can start the testing operation, and the testing result is considered valid under this insulation state. If the current measured by the current detection module 300 is less than the first threshold, the two plates can be considered to be in a near-complete insulation state. A near-complete insulation state means that the charge leaked between the plates per unit time does not exceed the level that affects the testing result, the testing device can still start the testing operation, and the testing result is still valid. If the current measured by the current detection module 300 is greater than the first threshold, the insulation level between the two plates is low, and the testing device cannot perform the testing operation normally. The setting of the first threshold for testing requirements and the level that the leaked charge does not exceed the level that affects the testing result can be set according to actual testing needs and standards. This application does not impose specific restrictions on this. For example, the first threshold can be 6.6 pA, and the level that the leaked charge does not exceed the level that affects the testing result means that the charge leaked between the two plates exceeds 10% within 5 minutes.

[0035] In one embodiment, reference Figure 5 The detection device also includes a temperature and humidity sensor, which measures the temperature and humidity of the current detection environment. Ambient temperature and humidity alter the electrical conductivity of the air and the mean free path of ions, thus affecting ion movement; they also influence the recombination between positive and negative ions, thereby affecting the static elimination effect of the ion wind generated by the ionization device, ultimately impacting the judgment and calculation of the ionization device's performance based on the detection results. To more accurately calculate the ionization device's performance, the temperature and humidity sensor is connected to the control module 500 and works in conjunction with other components in the detection device to perform any of the following functions, thereby improving the accuracy and reliability of the detection results.

[0036] Specifically, the temperature and humidity sensor can obtain the ambient temperature and humidity corresponding to the performance parameter test results of each ionization device under test, clearly informing the testers of the corresponding environment for this test, so that the testers can comprehensively consider the test results.

[0037] Specifically, the temperature and humidity sensors acquire the ambient temperature and humidity corresponding to the test and transmit them to the control module 500. The control module 500 corrects the performance parameters of the ionization device under test based on the current ambient temperature and humidity to make the test results more accurate. For example, to more accurately calculate the ionization device's ability to eliminate electrostatic charge, a mathematical model that comprehensively considers various factors is established. In this model, the discharge time, equilibrium voltage, temperature, and humidity are used as variables, and the relationships and coefficients between these variables are determined through the test data obtained from the detection device and theoretical analysis. During physical calculations, based on the actual measured data such as discharge time, equilibrium voltage, ambient temperature, and humidity, a more realistic performance test result for the ionization device is obtained.

[0038] Specifically, before the testing device performs tests on the ionization equipment, ambient temperature and humidity are measured using temperature and humidity sensors. When the ambient temperature and humidity meet preset values, the control module 500 controls the ionization equipment performance testing device to start the testing function. This means that if the current testing environment does not meet the testing requirements, the ionization equipment cannot be tested by the testing device to avoid inaccurate test results.

[0039] In one embodiment, reference Figure 5 The testing device also includes a display, which is connected to the control module 500 to display the performance parameters of the ionization device under test and the ambient temperature and humidity measured by the aforementioned temperature and humidity sensors. It can also display the complete voltage-time change curve after the test for staff to view.

[0040] In one embodiment, reference Figure 5 The detection device also includes at least one interface, which is used to communicate with external devices to export the performance test results of the ionization device or various types of data. Other interfaces can be used for upgrades, expansion of functions, etc., without specific limitations.

[0041] In one embodiment, reference Figure 5The testing device also includes a power module to power the entire device. The power module mainly includes a power adapter, a DC-DC charging circuit, a lithium battery, a first DC-DC converter, and a second DC-DC converter. The power adapter connects to the input of the DC-DC charging circuit, and the output of the DC-DC charging circuit connects to the lithium battery. The power adapter is an AC-to-DC power adapter, connected to external AC power or other AC power supply equipment, and its function is to convert AC power (100-250V) into 24V DC power. The DC-DC charging circuit converts the DC power output from the adapter into the precise charging voltage required by the battery through a buck or buck-boost topology, ensuring safe charging of the battery, guaranteeing battery life, and ensuring the reliability of the testing device. The lithium battery is connected to both the first and second DC-DC converters. The output of the first DC-DC converter is connected to a high-voltage generator 400, and the lithium battery powers the high-voltage generator 400 through the first DC-DC converter. The output of the second DC-DC converter is connected to a control module 500, and the lithium battery powers the control module 500 through the second DC-DC converter. The function of both the first and second DC-DC converters is to convert the power supply voltage of the lithium battery into the power supply voltage of the corresponding high-voltage generator 400 and control module 500. There are no restrictions on the specific lithium battery power supply or the specific voltage conversion value of the DC-DC converters; the design can be selected based on the testing requirements and the power supply requirements of each chip.

[0042] Based on the above implementation methods, refer to Figures 1-5 Another possible operating process of the ionization equipment performance testing device of this application: Before starting the test: The control module 500 acquires the ambient temperature and humidity of the test environment through temperature and humidity sensors, and determines whether the current ambient temperature and humidity meet the detection requirements. After meeting the requirements of the test environment temperature and humidity, the control module 500 controls the high voltage generator 400 to apply a preset constant high voltage to the capacitor 100 to detect whether the insulation between the two plates of the capacitor 100 meets the test requirements. Start testing: Once the above testing requirements are met, turn on the testing device; The control module 500 controls the high voltage generator 400 to apply an initial voltage U0 (typically + / - 1000V) to the capacitor 100. The detection plate 200 receives the ion flow generated by the ionization device under test. The current detection module 300 calculates the first current generated by the ion flow, where the first current generated at this time is the second current of the capacitor 100; During the test, the control module 500 reads the current from the current detection module 300 and sets the sampling period. t; The average current flow I1 during the first sampling period on the detection plate 200 is calculated based on the read current. The sampling period is calculated based on the average current I1. The amount of charge Q1 = I1 that reaches the detection plate 200 within t. t, thus obtaining the voltage change of the first detection plate 200: U1 = Q1 / C, where C is the capacitance of capacitor 100; Control the target voltage output by the high voltage generator 400 to the capacitor 100 in the next preset sampling period, until U1 = U0 + U1, and record the voltage and time; After repeating the above sampling and calculation process, the target voltage output by the high-voltage generator 400 to the capacitor 100 for each sampling period can be obtained, thus obtaining the plate voltage-time sequence (U). i ,t i ); Results analysis: According to the voltage-time sequence (U i ,t i Store the data and plot the voltage-time curve, referencing... Figure 2 ; Through the curve of voltage and time (U) i ,t i The figure shows the performance parameters of the ionization device under test: the time when the voltage U(i) first drops to the set voltage, such as + / -100V or the test duration limit, i.e., the power exhaust time t. 消电 ;(U i ,t i The figure shows the time after the power dissipation period (t). i >t 消电 The maximum absolute value of the voltage in the voltage-time curve is the equilibrium voltage U. 平衡 (U) 平衡 (Not shown in the diagram) The change curve, the static electricity dissipation performance parameters of the tested ionization device, and the ambient temperature and humidity corresponding to this test are displayed on the monitor to complete this test.

[0043] Based on the above implementation, after the two plates of capacitor 100 are charged, because the volume resistance and surface resistance of the insulating support between the plates are not truly infinite (and its surface resistance is greatly affected by humidity and the cleanliness of the support surface), the plates are not completely insulated. This results in most of the charge on the charging plates being lost over time, even in an environment without ionizing wind (and also causes a decrease in the voltage of the metal parallel plate capacitor). Therefore, when testing the discharge performance of the ionization device, the voltage change of the metal parallel plate capacitor caused solely by ionizing wind cannot be accurately reflected. Based on this, this application adds an equipotential detection plate 200 in front of the first plate 101 of the capacitor 100. The voltage on the capacitor 100 and the detection plate 200 is adjusted by the high voltage generator 400. The current generated by the ion flow rate of the ionization device reaching the detection plate 200 is measured by the current detection module 300. The control module controls the device to calculate and adjust the capacitor 100 and the detection plate 200. Since the first plate 101 and the detection plate 200 connected to the current detection module 300 are equipotential and the voltage of the first plate 101 is controlled by the high voltage generator 400, the influence of leakage of the plate voltage (charge) caused by leakage through the insulating support between the first plate 101 and the second plate 102 on the test is effectively eliminated, making the test results more stable, accurate and reliable. The control module of the detection device mainly includes a memory and one or more processors. The memory can store the voltage and time corresponding to each change mentioned above. The processor can be configured to perform various control and analysis functions in the detection device of this application. For example, it can control and adjust the voltage output of the high voltage generator 400 according to the current measured by the current detection module 300, and generate a voltage change curve with time according to the voltage value stored in the memory and the corresponding time, and obtain the performance parameters of the ionization device under test according to the change curve.

[0044] Furthermore, it should be understood that the various modules are merely illustrative of the functional modules of the device of the present invention. The physical devices corresponding to these modules may be the processor itself, or a part of the processor's software, hardware, or a combination of software and hardware. Therefore, the number of modules shown in the figures is merely schematic. Those skilled in the art will understand that the various modules in the system can be adaptively split or merged. Such splitting or merging of specific modules will not cause the technical solution to deviate from the principles of the present invention; therefore, the technical solutions after splitting or merging will fall within the protection scope of the present invention.

[0045] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, and substitutions to the above embodiments within the scope of this application.

Claims

1. A performance testing device for ionization equipment, characterized in that, include: A capacitor includes a first plate and a second plate arranged in parallel. A detection plate is connected in series with the first electrode plate and has the same potential. The detection plate is used to receive the ion flow generated by the ionization device under test. A current detection module is connected to the first electrode plate and the detection plate respectively. The current detection module is used to measure the first current generated by the ion flow received by the detection plate and determine the second current corresponding to the capacitor based on the first current. A high-voltage generator, with one end connected to the first electrode plate and the other end grounded together with the second electrode plate, is used to provide voltage to the capacitor; The control module is connected to both the current detection module and the high-voltage generator, and is configured as follows: The average current within the current preset sampling period is calculated based on the second current measured by the current detection module. The voltage change value of the capacitor corresponding to the current preset sampling period is calculated based on the average current within the current preset sampling period, the duration of the preset sampling period, and the capacitance value of the capacitor. Based on the voltage change value corresponding to the current preset sampling period and the current voltage provided by the high voltage generator to the capacitor in the current preset sampling period, the target voltage that the high voltage generator needs to provide to the capacitor in the next preset sampling period is calculated, and the high voltage generator is controlled to output the target voltage in the next preset sampling period; Multiple sampling cycles are cyclically performed, and a voltage change curve over time is generated based on the voltage output of the high voltage generator to the capacitor and the preset sampling cycle for each preset sampling cycle. The performance parameters of the ionization device under test are determined based on the voltage change curve over time. The control module is configured as follows: The amount of charge arriving at the detection plate during the current preset sampling period is calculated based on the average current during the current preset sampling period and the duration of the preset sampling period. The voltage change value of the detection plate corresponding to the current preset sampling period is calculated based on the amount of charge arriving at the detection plate within the current preset sampling period and the capacitance value of the capacitor. The control module is also configured to: Based on the difference between the current voltage supplied by the high voltage generator to the capacitor in the current preset sampling period and the voltage change value of the detection plate corresponding to the current preset sampling period, the target voltage that the high voltage generator needs to supply to the capacitor in the next preset sampling period is calculated. The control module is configured as follows: Based on the time corresponding to the first drop of the voltage to the preset decay voltage value in the voltage-time curve, the power elimination time of the tested ionization device is obtained. The equilibrium voltage of the ionization device under test is obtained based on the maximum absolute value of the voltage in the portion of the curve after the extinction time in the voltage-time curve.

2. The ionization equipment performance testing device according to claim 1, characterized in that, A first insulating support is provided between the first electrode plate and the second electrode plate; A second insulating support is provided on the side of the first electrode plate away from the second electrode plate; the detection plate is disposed on the second insulating support. The first electrode plate, the second electrode plate, and the detection plate are of the same size; The first electrode plate, the second electrode plate, and the detection plate have rough surfaces or their surfaces are coated with a thin film.

3. The ionization equipment performance testing device according to claim 2, characterized in that, The first insulating support is columnar, and the area of ​​the cross-section of the first insulating support perpendicular to the axial direction is smaller than the area of ​​the first electrode plate. The second insulating support is plate-shaped, and the area of ​​the second insulating support is the same as the area of ​​the detection plate. The second insulating support is provided with a mounting portion protruding from the surface, and the mounting portion is positioned relative to the detection plate. The mounting portion is positioned close to and around the edge of the second insulating support.

4. The ionization equipment performance testing device according to claim 1, characterized in that, The current detection module includes a sampling resistor, an operational amplifier, and an ADC analog-to-digital converter connected in sequence; the sampling resistor is connected to the detection plate and the first electrode plate, and the ADC analog-to-digital converter is connected to the control module.

5. The ionization equipment performance testing device according to claim 1, characterized in that, The high-voltage generator is also used to apply a preset detection voltage to the first electrode plate before the device detects the ionization device under test. The current detection module is also used to measure the current value on the first electrode plate under the preset detection voltage; The control module is also used to determine whether the insulation level between the first electrode plate and the second electrode plate meets the detection requirements based on the current value on the first electrode plate. If it is determined that the detection requirements are met, the control module controls the ionization equipment performance testing device to start the detection function.

6. The ionization equipment performance testing device according to claim 1, characterized in that, The device also includes a temperature and humidity sensor, which is connected to the control module. The control module is also used to acquire the ambient temperature and humidity corresponding to the performance parameter test results of each tested ionization device via the temperature and humidity sensor; and / or, The control module is also used to correct the performance parameters of the ionization device under test based on the ambient temperature and humidity measured by the temperature and humidity sensor; and / or, The control module is also used to control the ionization equipment performance testing device to start the detection function when the ambient temperature and humidity measured by the temperature and humidity sensor meet the preset values.

7. The ionization equipment performance testing device according to claim 6, characterized in that, The device also includes a display connected to the control module; the display is used to display the performance parameters of the ionization device under test and the ambient temperature and humidity measured by the temperature and humidity sensor.

8. The ionization equipment performance testing device according to claim 7, characterized in that, The capacitance of the capacitor is 20pF ± 2pF.

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