KR102605712B1 - Condensation detection apparatus and condensation simulation test method for automotive parts - Google Patents

Abstract

The present invention relates to a condensation detection device and a condensation reproduction test method for automobile parts. The condensation detection device according to the present invention includes a power source and an LED, a condensation detection circuit that switches from an open circuit to a closed circuit when condensation occurs on the surface of the component to be tested, and measures the voltage applied to both ends of the LED. It includes a data analyzer that determines whether condensation occurs in the component to be tested based on voltage, and a constant temperature and humidity device that applies preset temperature and humidity conditions to the component to be tested.

Description

Condensation detection device and condensation reproduction test method for automotive parts {CONDENSATION DETECTION APPARATUS AND CONDENSATION SIMULATION TEST METHOD FOR AUTOMOTIVE PARTS}

The present invention relates to a condensation detection device for detecting whether and when condensation occurs in various automobile parts, including electrical components, and a condensation reproduction test method using the device.

Condensation and moisture infiltration may occur in the high temperature and high humidity environment of an internal combustion engine vehicle. As a result, cracks, partial wear, and corrosion may occur in automotive electrical components, bolts, and metal frame parts. In order to minimize the damage caused by this, the parts are being replaced with plastic materials, but in order to find a more fundamental solution, a quantified and standardized analysis of the conditions under which condensation occurs is necessary.

However, existing temperature and humidity tests for automobile parts focus only on whether corrosion occurs, and generally only evaluate surface corrosion and the resulting operation, regardless of whether condensation occurs during the test. However, since condensation may not occur depending on test conditions or component material characteristics, there is a problem that the effectiveness of the test cannot be secured if the problem is not approached accordingly.

In order to solve the above problems, the purpose of the present invention is to provide a condensation detection device and a condensation reproduction test method that can derive quantified data on the minimum conditions for condensation to occur and the time of occurrence.

The object of the present invention is not limited to the object mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the description below.

A condensation detection device according to an embodiment of the present invention for achieving the above object includes a condensation detection circuit that includes a power source and an LED and switches from an open circuit to a closed circuit when condensation occurs on the surface of a component to be tested; a data analyzer that measures the voltage applied to both ends of the LED and determines whether condensation has occurred in the component under test based on the voltage; and a constant temperature and humidity device that applies preset temperature and humidity conditions to the test target component.

In one embodiment of the present invention, the data analyzer may determine whether condensation has occurred in the component under test based on whether the voltage changes periodically.

In one embodiment of the present invention, the data analyzer may determine the time when the voltage begins to change periodically as the time when condensation of the component under test occurs.

In one embodiment of the present invention, the condensation detection device may further include a thermocouple that measures the surface temperature of the component under test. In this case, the data analyzer may determine whether condensation has occurred in the component under test based on the surface temperature measured by the thermocouple.

In one embodiment of the present invention, the data analyzer calculates a dew point temperature based on the humidity condition, calculates a temperature difference between the dew point temperature and the surface temperature, and calculates a temperature difference between the dew point temperature and the surface temperature, and determines the temperature of the component under test based on the temperature difference. It is possible to determine whether condensation has occurred.

In one embodiment of the present invention, the data analyzer calculates the dew point temperature based on the humidity condition, and determines the time when the surface temperature begins to become lower than the dew point temperature as the time when condensation of the component under test occurs. You can.

In addition, the condensation reproduction test method according to an embodiment of the present invention includes applying preset temperature and humidity conditions to the test target component; Measuring the voltage applied across the LED on a condensation detection circuit that includes a power source and an LED and switches from an open circuit to a closed circuit when condensation occurs on the surface of the component under test; and determining whether condensation has occurred in the component under test based on the voltage.

In one embodiment of the present invention, the step of determining whether condensation has occurred may be to determine whether condensation has occurred in the component under test based on whether the voltage changes periodically.

In one embodiment of the present invention, the step of determining whether condensation occurs may further include determining the time when the voltage begins to change periodically as the time when condensation of the component under test occurs.

In one embodiment of the present invention, the condensation reproduction test method includes calculating a dew point temperature based on the humidity condition; Measuring the surface temperature of the component to be tested; And it may further include calculating a temperature difference between the dew point temperature and the surface temperature. In this case, the step of determining whether condensation has occurred may be to determine whether condensation has occurred in the component under test based on the temperature difference.

In one embodiment of the present invention, the step of determining whether condensation occurs includes determining the time when the surface temperature begins to become lower than the dew point temperature as the time when condensation of the component under test occurs based on the temperature difference. It may further include.

According to an embodiment of the present invention, it is possible to monitor whether condensation occurs over time by test conditions and component characteristics (size, surface material, etc.), and based on the results, severe test design and failure simulating field phenomena are possible. Because reproducible testing is possible, it is possible to conduct improved research to ensure reliability using the present invention. In other words, through the present invention, it is possible to establish a failure mechanism for the failure modes found in failed products in the actual field, and provide objective basis data to establish reasonable improvement measures in the form of improvement design or material replacement for weak parts. It can be arranged. In addition, as the development of eco-friendly vehicles, such as hydrogen electric vehicles, is accelerating, the present invention can be used to derive evidence related to durability in a high-humidity environment created during the power generation process.

The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

1 is a conceptual diagram of a condensation detection device and a condensation reproduction test method according to an embodiment of the present invention.
Figure 2 is a graph showing the change trend of the difference between the dew point temperature and the component surface temperature.
Figure 3 is a graph showing the trend of LED lighting voltage.
Figure 4 is a block diagram showing the configuration of a condensation detection device according to an embodiment of the present invention.
Figure 5 is a flowchart illustrating a condensation reproducibility test method according to an embodiment of the present invention.

The present invention relates to a condensation detection device for detecting whether and when condensation occurs in various automobile parts, including electrical components, and a condensation reproduction test method using the device. The present invention is characterized by being able to evaluate whether or when condensation occurs in various automobile parts, including electrical components. This specification describes the minimum conditions for condensation to occur, a test guide for deriving quantified data about the time of occurrence, test circuit configuration, and data analysis method.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is not limited. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Meanwhile, the terms used in this specification are for describing embodiments and are not intended to limit the present invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprises” and/or “comprising” means that a referenced element, step, operation and/or element precludes the presence of one or more other elements, steps, operations and/or elements. or does not rule out addition. The term 'surface' used in this specification includes both the external surface of the object and the internal surface of the object.

In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate overall understanding in describing the present invention, the same reference numbers will be used for the same means regardless of the drawing numbers.

1 is a conceptual diagram of a condensation detection device and a condensation reproduction test method according to an embodiment of the present invention.

A condensation detection device according to an embodiment of the present invention includes a condensation detection circuit, a thermocouple, a data logger, and a thermohygrostat.

The condensation detection circuit (which may be referred to as a 'moisture detection circuit' or 'condensation detection circuit') is an open circuit as shown in FIG. 1, but can be converted to a closed circuit form by moisture. When the condensation detection circuit becomes a closed circuit, that is, when electricity is turned on, the LED included in the condensation detection circuit lights up, thereby generating voltage. The condensation detection device detects condensation by measuring the LED lighting voltage. The connection between the condensation detection circuit and the components is fixed using tape, etc. by placing a moisture-absorbing wiper (paper tissue) in contact with the detection unit (two conductors), and the detection unit is used to check condensation. It can be attached to the surface of a part.

In the condensation detection device, a conductor connected to both ends of the LED included in the condensation detection circuit may be connected to a data logger for logging of voltage before and after the LED is turned on. Additionally, a thermocouple wire attached to the surface of the component under test (component to be measured) may be connected to the data logger. The condensation detection device can monitor trends in LED lighting voltage and component surface temperature over time through a data logger.

The constant temperature and humidity chamber included in the condensation detection device (can be referred to as a 'constant temperature and humidity chamber') creates an environment for condensation to occur in the component under test. For the condensation reproduction test, the condensation detection circuit and test target components included in the condensation detection device are placed in a constant temperature and humidity chamber. A thermohygrostat can apply preset temperature/humidity conditions. The temperature/humidity conditions may be temperature/humidity conditions according to known test standards (ISO 16750-4 or IEC 60068-2-30). For example, a thermohygrostat can apply conditions that increase the temperature from room temperature (23±5℃) to 55±2℃ within 3 hours. In other words, the thermohygrostat can apply a temperature increase gradient of at least 10 ℃/h (≒ 0.17 ℃/min). In addition, a thermohygrostat can increase humidity along with temperature increase, and in this way, condensation can be confirmed even during the temperature increase process. If repetition is necessary, it is advisable to leave the test subject at room temperature for more than 6 hours and then perform the test again. As another example, the test can be repeated by applying room temperature cooling conditions using a thermohygrostat (equivalent to a temperature increase gradient) and then leaving the test subject for more than 3 hours.

In relation to data analysis, the condensation detection device determines whether condensation occurs and when condensation occurs based on the part surface temperature data collected through the data logger and the voltage between both ends of the LED included in the condensation detection circuit (hereinafter abbreviated as 'LED voltage') data. can be judged. The condensation detection device can use the known August-Roche-Magnus equation to calculate the dew point under the humidity conditions set in the thermohygrostat. Additionally, the condensation detection device can estimate whether condensation has occurred using the temperature difference between the dew point temperature and the component surface temperature monitored through a thermocouple (see Figure 2). For example, when the temperature difference is 0 (℃), it means that the dew point temperature and the component surface temperature are the same, so the condensation detection device can determine that condensation has occurred when the temperature difference is 0 (℃). In addition, the condensation detection device determines the point at which condensation occurs when the sign of (dew point temperature - component surface temperature) changes from negative (-) to positive (+), that is, when the component surface temperature begins to become lower than the dew point temperature. can do.

Additionally, the condensation detection device can monitor the LED voltage of the condensation detection circuit and determine whether condensation has occurred and when condensation has occurred based on the voltage (see FIG. 3). For example, when the LED voltage shows the shape of a wave, the condensation detection device can determine the point at which the cycle of the wave begins as the point at which condensation occurs. Meanwhile, the condensation detection device can determine whether condensation has occurred and when condensation has occurred by comparing the condensation occurrence point determined through the temperature difference between the dew point temperature and the component surface temperature with the condensation occurrence point determined based on the LED voltage. For example, the condensation detection device determines that condensation has occurred through the analysis results of the difference between the dew point temperature and the component surface temperature, but if the LED voltage does not show a wave shape, it can ultimately be determined that condensation has not occurred. As another example, the condensation detection device may determine whether condensation has occurred based on the results of analyzing the difference between the dew point temperature and the component surface temperature, and may determine when condensation has occurred based on LED voltage data.

In Figures 2 and 3, different colors indicate different parts placed in the same temperature/humidity environment. Differences in thermal conductivity may appear depending on the size of the part, and differences in thermal conductivity may appear as differences in condensation time. For example, the part shown in green in Figure 3 is a part that is relatively large in size compared to other parts, and has lower thermal conductivity than other parts, so it condenses faster than other parts during the temperature increase process.

Figure 4 is a block diagram showing the configuration of a condensation detection device according to an embodiment of the present invention.

The condensation detection device 100 according to an embodiment of the present invention includes a condensation detection circuit 110, a thermocouple 120, a data analyzer 130, and a thermohygrostat 140. Data analyzer 130 includes a data logger.

The condensation detection circuit 110 is a circuit for detecting whether condensation occurs in the component under test. The condensation detection circuit 110 may be configured as shown in FIG. 1, and conductive wires connected to both ends of the LED included in the condensation detection circuit 110 may be connected to a data logger. The condensation detection circuit 110 is an open circuit as shown in FIG. 1, but can be converted to a closed circuit due to moisture. The detection unit (two conductors) of the condensation detection circuit 110 is attached to the surface of the component to be tested, and can be connected by moisture when condensation occurs on the surface of the component. When the condensation detection circuit 110 becomes a closed circuit and is energized, the LED included in the condensation detection circuit 110 lights up, thereby generating a voltage between both ends of the LED (hereinafter referred to as 'LED voltage'). The data analyzer 130 measures the LED voltage over time using the condensation detection circuit 110. The data analyzer 130 records the LED voltage over time through a data logger. The data analyzer 130 can monitor trends in LED voltage over time.

The thermocouple 120 measures the surface temperature of the component under test. The thermocouple 120 conductor attached to the surface of the component under test may be connected to the data logger. That is, the data analyzer 130 collects component surface temperature data from the thermocouple 120. The data analyzer 130 records the component surface temperature over time through a data logger.

As described above, the data analyzer 130 measures the voltage (LED voltage) between the two ends of the LED of the condensation detection circuit 110 and collects component surface temperature data from the thermocouple 120. Additionally, the data analyzer 130 may collect data on the humidity condition currently being applied in the thermo-hygrostat 140. The data analyzer 130 can calculate the dew point temperature under the humidity conditions using the known August-Roche-Magnus equation. Additionally, the data analyzer 130 calculates the difference between the calculated dew point temperature and the collected component surface temperature over time.

The data analyzer 130 may determine whether and when condensation occurs in the component under test based on at least one of the difference between the LED voltage and dew point temperature and the component surface temperature.

The data analyzer 130 can monitor the LED voltage of the condensation detection circuit 110 and determine whether condensation has occurred and when condensation has occurred based on the LED voltage (see FIG. 3). For example, when the LED voltage shows the shape of a wave, the data analyzer 130 may determine that condensation has occurred, and may determine the point in time at which the cycle of the wave begins as the point in time at which condensation has occurred.

Additionally, the data analyzer 130 can estimate whether condensation has occurred using the temperature difference between the dew point temperature and the component surface temperature monitored through the thermocouple 120 (see FIG. 2). For example, the data analyzer 130 may obtain the value of (dew point temperature - component surface temperature) and determine that condensation has occurred in a section where this value is greater than or equal to 0. If the (dew point temperature - component surface temperature) value is greater than or equal to 0, the relationship of dew point temperature ≥ component surface temperature is established. In addition, the data analyzer 130 can determine when condensation occurs based on the temperature difference. For example, when the temperature difference is 0 (℃), it means that the dew point temperature and the component surface temperature are the same. The data analyzer 130 may determine the time when the temperature difference begins to reach 0 (℃) as the time when condensation occurs. Specifically, the data analyzer 130 determines when the sign of (dew point temperature - component surface temperature) changes from negative (-) to positive (+), that is, when the component surface temperature begins to become lower than the dew point temperature, condensation occurs. It can be judged by the point in time.

Meanwhile, the data analyzer 130 can determine whether condensation occurs and when condensation occurs by comparing the condensation occurrence point determined through the temperature difference value between the dew point temperature and the component surface temperature with the condensation occurrence point determined based on the LED voltage. there is. For example, the data analyzer 130 determines that condensation has occurred through the analysis result of the difference between the dew point temperature and the component surface temperature, but if the LED voltage does not show a wave shape, it can be ultimately determined that condensation has not occurred. . As another example, the data analyzer 130 may determine whether condensation has occurred based on an analysis result of the difference between the dew point temperature and the component surface temperature, and may determine when condensation has occurred based on LED voltage data.

In addition, the data analyzer 130 can derive temperature/humidity conditions corresponding to the condensation generation section based on data on temperature/humidity conditions collected by the thermostat 140, and is included in the condensation detection device 100. A separate display can display the temperature/humidity conditions under which condensation occurs.

The thermo-hygrostat 140 applies a condensation generating environment, that is, temperature/humidity conditions, to the test target component. For this purpose, the condensation detection circuit 110 and the component to be tested must be placed in the temperature and humidity chamber 140. The thermohygrostat 140 may apply preset temperature/humidity conditions. The temperature/humidity conditions may change over time. Additionally, the temperature/humidity conditions may be temperature/humidity conditions according to known test standards (ISO 16750-4 or IEC 60068-2-30). For example, the thermohygrostat 140 can apply conditions to increase the temperature from room temperature (23 ± 5°C) to 55 ± 2°C within 3 hours. That is, the thermohygrostat 140 can apply a temperature increase gradient of at least 10 °C/h (≒ 0.17 °C/min). Additionally, the thermohygrostat 140 can increase humidity along with temperature increase, and in this way, condensation can be confirmed even during the temperature increase process. The thermohygrostat 140 provides set temperature/humidity conditions to the test target component for a set period of time.

Meanwhile, the contents of FIGS. 1 to 3 can be applied to the contents of FIG. 4. Additionally, the content of FIG. 4 can be applied to the content of FIGS. 1 to 3.

Figure 5 is a flowchart illustrating a condensation reproducibility test method according to an embodiment of the present invention.

Step S210 is a step of applying temperature/humidity conditions to the test target component. The temperature/humidity constant (140) creates an environment for condensation of the component to be tested, that is, temperature/humidity conditions. In order to perform the condensation reproduction test method according to an embodiment of the present invention, the condensation detection circuit 110 and the component to be tested must be placed in a constant temperature and humidity chamber 140. The thermohygrostat 140 may apply preset temperature/humidity conditions. The temperature/humidity conditions may be temperature/humidity conditions according to known test standards (ISO 16750-4 or IEC 60068-2-30). For example, the thermohygrostat 140 can apply conditions to increase the temperature from room temperature (23 ± 5°C) to 55 ± 2°C within 3 hours. That is, the thermohygrostat 140 can apply a temperature increase gradient of at least 10 °C/h (≒ 0.17 °C/min). Additionally, the thermohygrostat 140 can increase humidity along with temperature increase, and in this way, condensation can be confirmed even during the temperature increase process. The thermohygrostat 140 provides set temperature/humidity conditions to the test target component for a set period of time. Even after step S210, the temperature/humidity conditions according to the settings are given to the parts under test.

Step S220 is the LED voltage measurement step. Conductors connected to both ends of the LED included in the condensation detection circuit 110 configured as shown in FIG. 1 may be connected to a data logger.

The condensation detection circuit 110 is an open circuit as shown in FIG. 1, but can be converted to a closed circuit due to moisture. The detection unit (two conductors) of the condensation detection circuit 110 is attached to the surface of the component to be tested, and can be connected by moisture when condensation occurs on the surface of the component. When the condensation detection circuit 110 becomes a closed circuit and is energized, the LED included in the condensation detection circuit 110 lights up, thereby generating a voltage between both ends of the LED (hereinafter referred to as 'LED voltage'). The data analyzer 130 uses the condensation detection circuit 110 to measure the LED lighting voltage (LED voltage) over time. The data analyzer 130 records the LED voltage over time through a data logger. The data analyzer 130 can monitor trends in LED voltage over time.

Step S230 is a dew point temperature calculation step. The data analyzer 130 may collect humidity condition data currently being applied from the thermohygrostat 140. The data analyzer 130 can calculate the dew point temperature under the humidity conditions using the known August-Roche-Magnus equation.

Step S240 is a step of measuring the surface temperature of the part. The thermocouple 120 conductor attached to the surface of the component under test may be connected to the data logger. That is, the data analyzer 130 collects component surface temperature data from the thermocouple 120. The data analyzer 130 records the component surface temperature over time through a data logger.

Step S250 is the step of calculating the difference between the dew point temperature and the component surface temperature. The data analyzer 130 calculates the difference between the dew point temperature calculated in step S230 and the component surface temperature measured in step S240.

Step S260 is a condensation point judgment step. The data analyzer 130 may determine whether and when condensation occurs in the component under test based on at least one of the LED voltage measured in step S220 and the difference between the dew point temperature and the surface temperature of the component calculated in step S250. .

The data analyzer 130 can monitor the LED voltage of the condensation detection circuit 110 and determine whether condensation has occurred and when condensation has occurred based on the LED voltage (see FIG. 3). For example, when the LED voltage shows the shape of a wave, the data analyzer 130 may determine that condensation has occurred, and may determine the point in time at which the cycle of the wave begins as the point in time at which condensation has occurred.

Additionally, the data analyzer 130 can estimate whether condensation has occurred using the temperature difference between the dew point temperature and the component surface temperature monitored through the thermocouple 120 (see FIG. 2). For example, the data analyzer 130 may obtain the value of (dew point temperature - component surface temperature) and determine that condensation has occurred in a section where this value is greater than or equal to 0. This is because if the value of (dew point temperature - part surface temperature) is greater than or equal to 0, the relationship of (dew point temperature) ≥ (part surface temperature) is established. In addition, the data analyzer 130 can determine when condensation occurs based on the temperature difference. For example, when the temperature difference is 0 (℃), it means that the dew point temperature and the component surface temperature are the same. The data analyzer 130 may determine the time when the temperature difference begins to reach 0 (℃) as the time when condensation occurs. Specifically, the data analyzer 130 determines when the sign of (dew point temperature - component surface temperature) changes from negative (-) to positive (+), that is, when the component surface temperature begins to become lower than the dew point temperature, condensation occurs. It can be judged by the point in time.

Meanwhile, the data analyzer 130 can determine whether condensation occurs and when condensation occurs by comparing the condensation occurrence point determined through the temperature difference value between the dew point temperature and the component surface temperature with the condensation occurrence point determined based on the LED voltage. there is. For example, the data analyzer 130 determines that condensation has occurred through the analysis result of the difference between the dew point temperature and the component surface temperature, but if the LED voltage does not show a wave shape, it can be ultimately determined that condensation has not occurred. . As another example, the data analyzer 130 may determine whether condensation has occurred based on an analysis result of the difference between the dew point temperature and the component surface temperature, and may determine when condensation has occurred based on LED voltage data.

In addition, in step S260, the data analyzer 130 can derive the temperature/humidity conditions corresponding to the condensation generation section based on the data on the temperature/humidity conditions collected by the thermo-hygrostat 140, and the condensation detection device 100 ) can display the temperature/humidity conditions under which condensation occurs through a separate display included.

The above-described condensation reproduction test method was explained with reference to the flow chart presented in the drawing. For simplicity of illustration, the method is shown and described as a series of blocks; however, the invention is not limited to the order of the blocks, and some blocks may occur simultaneously or in a different order than shown and described herein with other blocks. Various other branches, flow paths, and sequences of blocks may be implemented that achieve the same or similar results. Additionally, not all blocks shown may be required for implementation of the methods described herein.

Meanwhile, in the description referring to FIG. 5, each step may be further divided into additional steps or combined into fewer steps, depending on the implementation of the present invention. Additionally, some steps may be omitted or the order between steps may be changed as needed. For example, steps S230 to S250 may be omitted. In addition, even if other omitted content, the content of FIGS. 1 to 4 can be applied to the content of FIG. 5. Additionally, the content of FIG. 5 may be applied to the content of FIGS. 1 to 4.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art may make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can do it.

100: Condensation detection device
110: Condensation detection circuit
120: thermocouple
130: data analyzer
140: Constant temperature and humidity device

Claims (11)

A condensation detection circuit that includes a power source and an LED and switches from open to closed loop when condensation occurs on the surface of the component under test.
a data analyzer that measures the voltage applied to both ends of the LED and determines whether condensation has occurred in the component under test based on the voltage; and
a constant temperature and humidity device that applies preset temperature and humidity conditions to the test target component;
A condensation detection device comprising a. According to paragraph 1,
The data analyzer,
Determining whether condensation occurs in the component under test based on whether the voltage changes periodically.
Phosphorus condensation detection device. According to paragraph 1,
The data analyzer,
Determining the point at which the voltage begins to change periodically as the point at which condensation of the component under test occurs.
Phosphorus condensation detection device. According to paragraph 1,
Further comprising a thermocouple that measures the surface temperature of the component to be tested,
The data analyzer,
Determining whether condensation has occurred in the component to be tested based on the surface temperature measured by the thermocouple.
Phosphorus condensation detection device. The method of claim 4, wherein the data analyzer,
Calculate the dew point temperature based on the humidity conditions,
Calculate the temperature difference between the dew point temperature and the surface temperature,
Determining whether condensation occurs in the component to be tested based on the temperature difference
Phosphorus condensation detection device. The method of claim 4, wherein the data analyzer,
Calculate the dew point temperature based on the humidity conditions,
Determining the point at which the surface temperature begins to become lower than the dew point temperature as the point at which condensation of the component under test occurs.
Phosphorus condensation detection device. Applying preset temperature and humidity conditions to the test target component;
Measuring the voltage applied across the LED on a condensation detection circuit that includes a power source and an LED and switches from an open circuit to a closed circuit when condensation occurs on the surface of the component under test; and
determining whether condensation has occurred in the component under test based on the voltage;
Condensation reproducibility test method including. The method of claim 7, wherein the step of determining whether condensation occurs,
Determining whether condensation occurs in the component under test based on whether the voltage changes periodically.
Phosphorus condensation reproduction test method. The method of claim 7, wherein the step of determining whether condensation occurs,
Further comprising determining the point at which the voltage begins to change periodically as the point at which condensation of the component under test occurs.
Phosphorus condensation reproduction test method. In clause 7,
calculating a dew point temperature based on the humidity conditions;
Measuring the surface temperature of the component to be tested; and
Further comprising calculating a temperature difference between the dew point temperature and the surface temperature,
The step of determining whether condensation occurs,
Determining whether condensation occurs in the component to be tested based on the temperature difference
Phosphorus condensation reproduction test method. The method of claim 10, wherein the step of determining whether condensation occurs,
Further comprising determining the time when the surface temperature begins to become lower than the dew point temperature as the time when condensation of the component under test occurs based on the temperature difference.
Phosphorus condensation reproduction test method.