KR102241507B1 - Evaluating apparatus and method of displacement meter sensor by environmental change - Google Patents

Abstract

The present invention relates to a reliability evaluation apparatus and an evaluation method for each environmental change of a displacement sensor, and in particular, relates to a reliability evaluation apparatus and an evaluation method for each environmental change of a displacement sensor for testing an operational reliability of a displacement sensor according to an actual use environment such as temperature or humidity. The present invention includes a closed chamber.

Description

Reliability evaluation device and evaluation method for each environmental change of displacement gauge sensor {EVALUATING APPARATUS AND METHOD OF DISPLACEMENT METER SENSOR BY ENVIRONMENTAL CHANGE}

The present invention relates to a reliability evaluation apparatus and evaluation method for each environmental change of a displacement sensor sensor, and more particularly, a reliability evaluation apparatus for each environmental change of a displacement sensor sensor that tests the operational reliability of a displacement sensor sensor according to an actual use environment such as temperature or humidity. And an evaluation method.

Recently, displacement gauge sensors have been widely used in various fields, including industrial facilities such as factory automation, and construction structures, and are selected in consideration of the purpose of use, target of use, and conditions of use among various displacement gauge sensors.

The displacement meter sensor has various measurement methods depending on the sensing element in the sensor, and the strain gauge, vibration expression, and potentiometer classified according to the sensing element convert external physical changes into electrical signals and provide the measured values.

These displacement gauge sensors need to be applied in the field to guarantee their performance through calibration and calibration depending on the product. In addition, according to the type of sensor, it must be able to present the range of use temperature according to production and product characteristics.

However, the currently used displacement sensor sensor is often not used under the temperature conditions suggested for each product, and thus accurate data reliability cannot be secured. In particular, sensing data measured in an extreme environment cannot be more reliable.

In addition, the review of the temperature influence is not conducted in the calibration stage, and only the functionality of the product is checked before use. In this regard, although the durability of the sensor is recognized only as a difference in the technology of the manufacturer, even the evaluation of the durability by the technology is not properly performed.

Therefore, it is important to secure the reliability of the displacement sensor sensor by evaluating the impact on the use environment including temperature. Nevertheless, since the failure of the displacement meter sensor is recognized only as a physical effect, it is necessary to consider the usage environment away from this.

In addition, in terms of safety, a device for evaluating the displacement sensor according to the usage environment is required to solve problems such as the reliability of measurement data provided from the displacement sensor and the replacement period of the displacement sensor.

Korean Patent Registration No. 10-0307146 Korean Patent Registration No. 0138455

The present invention is to solve the above-described problems, and to provide a reliability evaluation apparatus and evaluation method for each environmental change of a displacement sensor for testing the operational reliability of a displacement sensor sensor according to an actual use environment such as temperature or humidity.

To this end, the apparatus for evaluating the reliability of the displacement sensor according to environmental changes according to the present invention includes a closed chamber in which the displacement sensor is tested and is blocked from an external environment; An environment control system for controlling an environment inside the sealed chamber; A movable test bench installed inside the sealed chamber and supporting the displacement sensor sensor to be displaceable; A displacement adjuster for adjusting the displacement of the movable test bench; And a test terminal for receiving and analyzing a sensing value of the displacement sensor sensor according to a change in the environment inside the sealed chamber.

In this case, the sealed chamber includes a first gate through which one end of the displacement regulator installed outside the sealed chamber is inserted; And a second gate through which a cable for transmitting the measured value of the displacement sensor is drawn out; wherein, it is preferable that the first gate and the second gate each have a sealing device for blocking the sealed chamber from an external environment. .

In addition, the environmental control system may include a temperature controller for controlling a temperature inside the sealed chamber; And a humidity controller for controlling the humidity inside the sealed chamber. It is preferable to include at least any one or more of.

In addition, the movable test bench includes an installation table supporting the displacement sensor; And an actuator having one end supported by the mounting table, the other end mounted with the displacement sensor, and having a center drive configured to generate a displacement within a set range.

In addition, it is preferable that the test terminal evaluates the sensing value of the displacement sensor according to the environmental change according to different displacements of the displacement sensor sensor.

On the other hand, the method for evaluating the reliability of the displacement sensor sensor for each environmental change according to the present invention includes a sensor mounting step of mounting the displacement sensor sensor to be tested on a movable test bench installed inside a closed chamber; A displacement adjusting step of adjusting a displacement of a displacement meter sensor mounted on the movable test table with a displacement adjuster; An environment control step of adjusting an environment inside the sealed chamber with an environment control system; And a reliability evaluation step of receiving and analyzing a sensing value of the displacement meter sensor according to a change in the environment inside the closed chamber through a test terminal.

In this case, it is preferable that the reliability evaluation step is a step of evaluating a sensing value of the displacement sensor sensor according to the environmental change according to different displacements of the displacement sensor sensor.

The present invention as described above tests the operational reliability of the displacement meter sensor according to the actual use environment such as temperature or humidity conditions. Therefore, it is possible to evaluate the reliability of data due to environmental influences for displacement gauge sensors having various uses and functions.

In addition, it is possible to verify the persistence of sensing data over time in an actual environment using a displacement sensor, and to evaluate whether the displacement sensor is functioning normally in order to secure data reliability under various external conditions.

1 is a block diagram showing an apparatus for evaluating reliability for each environmental change of a displacement meter sensor according to the present invention.
2 is a flow chart showing a method for evaluating the reliability of a displacement meter sensor according to environmental changes according to the present invention.
3 is a first test example of the present invention (displacement 0 mm-temperature variable).
4 is a second test example of the present invention (displacement 5 mm-temperature variable).
5 is a third test example (displacement 10 mm-temperature variable) of the present invention.

Hereinafter, a reliability evaluation apparatus and evaluation method for each environmental change of a displacement meter sensor according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, as shown in Figure 1, the reliability evaluation device for each environmental change of the displacement meter sensor according to the present invention is a closed chamber 110, an environmental control system 120, a movable test bench 130, a displacement controller 140, and a test terminal 150. ).

The sealed chamber 110 has a structure that is shielded from the external environment, and in an embodiment, an environment control system 120 is installed under the sealed chamber 110. The environmental control system 120 is connected to the sealed chamber 110 to control temperature and/or humidity for setting environmental conditions.

The movable test bench 130 is installed inside the sealed chamber 110 and is equipped with a displacement meter sensor DS that is a test subject. The displacement controller 140 moves the movable test table 130 to vary the displacement of the displacement sensor DS. The test terminal 150 controls the test environment and analyzes the test result of the displacement sensor DS.

Accordingly, it is possible to perform an evaluation based on environmental influence on various types of displacement sensor DS in a state in which the displacement sensor DS is exposed to an actual use environment having various temperature or humidity conditions.

In addition, in the actual environment where the displacement sensor DS is exposed, it is possible to check the persistence of the sensing data according to the usage time, and to evaluate whether the displacement sensor DS performs its normal function in order to secure data reliability under various external conditions.

To this end, the sealed chamber 110 provides a sealed structure so that the test of the displacement meter sensor DS proceeds in a set test environment, thereby blocking the interior of the sealed chamber 110 in which the test is performed from an external environment.

As an embodiment, the sealed chamber 110 is configured as a box-shaped chamber to configure the environmental conditions of the displacement sensor DS, and the temperature range is adjusted to create an atmosphere. In addition, the humidity range can be adjusted or both the temperature and humidity (relative humidity) ranges can be adjusted.

The environment control system 120 controls the environment inside the sealed chamber 110, and is installed above and below the sealed chamber 110 to form a chamber system together with the sealed chamber 110.

This environmental control system 120 includes a temperature controller to regulate at least the temperature inside the sealed chamber 110. In addition, when the relative humidity inside the sealed chamber 110 is also controlled, a humidity controller is further included.

The temperature controller and/or the humidity controller is connected to the sealed chamber 110 by having a refrigerant circulation system, a fan, and a duct, and controls at least one of temperature and humidity inside the sealed chamber 110 through this. To form the environmental conditions of use.

In order to create an environment, the environment control system 120 may be controlled by a test terminal 150 to be described later, and in an embodiment, a temperature of -20°C to 90°C and a temperature by the chamber controller 121 interlocked with the test terminal 150 Relative humidity 0% ~ 99% can be achieved.

The movable test bench 130 is installed in the sealed chamber 110 and supports the displacement meter sensor DS, which is a test subject, in the sealed chamber 110 so as to be displaceable.

Therefore, while the displacement sensor DS is mounted on the movable test table 130, the displacement, which is one of the test parameters, is adjusted, and it is tested whether or not the variable displacement for each environmental condition is accurately sensed (detected).

The movable test bench 130 is made of a material that is less affected by temperature (or is hardly affected) due to the characteristics of the device installed inside the sealed chamber 110. For example, it is made of a material such as ceramic or Fe-Ni alloy invar to minimize heat conduction or thermal expansion.

In addition, the movable test bench 130 includes an installation table 131 and an actuator 132 for supporting the displacement sensor DS. One end of the actuator 132 is supported by the mounting table 131, and a displacement sensor DS is mounted at the other end.

In this case, a center drive is performed to generate a displacement of the displacement sensor DS within a set range, and when various displacements are applied to the displacement sensor DS, a multi-axis drive structure may be configured.

The movable test bench 130 is a method configured to operate alone (independently driven) inside the sealed chamber 110 without transmitting power from a device outside the sealed chamber 110, or a device outside the sealed chamber 110 A method of receiving power from and driving (interlocking) may be applied.

In the case of the independent driving type, the movable test bench 130 is driven for displacement inside the sealed chamber 110 by an external wired/wireless control signal, and in the case of an interlocking type, the actuator 132 inside is performed by an external mechanical device. Works.

The displacement controller 140 controls the displacement of the movable test bench 130 and controls the movable test bench 130 to which the displacement meter sensor DS is mounted.

Displacement Movement provides a constant displacement condition. In an embodiment, the displacement is 0mm to 300mm, and the range is adjusted according to the use and performance of the displacement meter sensor (DS) to be tested.

In this case, as described above, when the movable test bench 130 is an independent driving type, the displacement controller 140 may be a remote controller that remotely controls the movable test bench 130 through wired or wireless communication.

On the other hand, in the case of an interlocking type, the displacement controller 140 is connected to the movable test bench 130 as shown. To this end, the displacement controller 140 may include a displacement controller 141, a displacement controller 142, and a connecting rod 143.

The displacement control controller 141 operates the displacement control driver 142 by receiving a command transmitted from the test terminal 150. The displacement adjusting driver 142 includes a multi-axis driver or a rotating machine to enable displacement of the displacement sensor DS.

The connecting rod 143 connects the displacement control actuator 142 and the movable test bench 130, and is made of ceramic or Invar material having a small influence by temperature, and one end and the other end thereof are the displacement control actuator 142 and the movable test bench. It is connected to the actuator 132 of 130. Accordingly, the displacement of the actuator 132 is adjusted according to the operation of the displacement adjusting driver 142.

In addition, a first gate 111a through which one end of the displacement regulator 140 is inserted is formed at one side of the sealing chamber 110 so that the connecting rod 143 passes through the sealing chamber 110. That is, the connecting rod 143 is connected to the actuator 132 through the first gate 111a.

The first gate 111a has a structure in which a sealing 112a for blocking the sealed chamber 110 from an external environment is installed. As an example, the sealing 112a may be applied with a rubber stopper having a hole formed therethrough.

The rubber stopper has good temperature resistance, and its outer circumferential surface is in close contact with the first gate 111a, and is fitted to block the first gate 111a, and the connecting rod 143 passes through a hole formed in the rubber stopper. It is fitted so as to be.

Therefore, even when the connecting rod 143 is brought in, it is blocked from the outside of the sealed chamber 110, so even if the connecting rod 143 is brought into the sealed chamber 110 and connected to the displacement controller 140, the temperature and humidity It will not affect the conditions.

The second gate 111b formed at the other end of the sealed chamber 110 is a cable CA for transmitting the measured value (sensing value) of the displacement sensor DS. A sealing 112b for blocking 110 from the outside may be provided.

However, in the case of wirelessly transmitting the measured value of the displacement sensor DS, the above cable CA, the second gate 111b, and the sealing 112a may be omitted.

The test terminal 150 receives and analyzes the sensing value of the displacement sensor DS according to changes in the environment inside the closed chamber 110, and analyzes the displacement sensor DS according to the environmental change for different displacements of the displacement sensor DS. ) To evaluate the sensing value.

The test terminal 150 may be a PC or server equipped with an analysis function. In addition, the test terminal 150 may further include a memory and a data logger 151 for storing test condition and result data.

The data logger 151 may be provided integrally with the test terminal 150 composed of a PC or the like, or may be provided as a separate device, and converts the signal output through the cable CA of the displacement meter sensor DS and/or Converted to electrical measured values through an amplifier. The converted electrical measurement value is provided to the test terminal 150 as displacement data.

Accordingly, the present invention tests the operational reliability of the displacement meter sensor DS according to the actual use environment such as temperature and humidity, so that it is possible to evaluate the reliability of data due to environmental influences for the displacement meter sensor DS having various uses and functions. do.

In addition, it is possible to verify the persistence of sensing data over time in an actual environment using the displacement sensor (DS), and to evaluate whether the displacement sensor (DS) performs its normal function in order to secure data reliability under various external conditions.

Hereinafter, a method for evaluating the reliability of the displacement sensor for each environmental change according to the present invention will be described with reference to the accompanying drawings.

However, in the following description, as an example, the evaluation is performed by the reliability evaluation apparatus for each environment change of the displacement sensor sensor of the present invention described above as an example.

As shown in FIG. 2, the method for evaluating the reliability of the displacement meter sensor for each environmental change according to the present invention includes a sensor mounting step (S110), a displacement adjusting step (S120), an environment adjusting step (S130), and a reliability evaluation step (S140).

At this time, in the sensor mounting step (S110), the displacement meter sensor DS as a test target is mounted on the movable test bench 130 installed inside the sealed chamber 110. The displacement sensor DS as a test object can be applied in a variety of ways depending on the use and function.

The sealed chamber 110 provides a sealed structure so that the test of the displacement sensor DS proceeds in a set test environment, thereby blocking the interior of the sealed chamber 110 in which the test is performed from an external environment.

The movable test bench 130 is installed in the sealed chamber 110 and supports the displacement sensor DS, which is a subject under test, in the sealed chamber 110 so as to be displaceable.

Therefore, while the displacement sensor DS is mounted on the movable test table 130, the displacement, which is one of the test parameters, is adjusted, and it is tested whether or not the variable displacement for each environmental condition is accurately sensed (detected).

Next, in the displacement adjustment step S120, the displacement of the displacement meter sensor DS mounted on the movable test table 130 is adjusted by the displacement controller 140.

The displacement controller 140 controls the displacement of the movable test bench 130 and controls the movable test bench 130 to which the displacement meter sensor DS is mounted.

Displacement Movement provides a constant displacement condition. In an embodiment, the displacement is 0mm to 300mm, and the range is adjusted according to the use and performance of the displacement meter sensor (DS) to be tested.

As described above with reference to FIG. 1, the displacement regulator 140 is connected to the movable test bench 130. To this end, the displacement controller 140 may include a displacement controller 141, a displacement controller 142, and a connecting rod 143.

The displacement control controller 141 operates the displacement control driver 142 by receiving a command transmitted from the test terminal 150. The displacement adjusting driver 142 includes a multi-axis driver or a rotating machine to enable displacement of the displacement sensor DS.

The connecting rod 143 connects the displacement control actuator 142 and the movable test bench 130, and one end and the other end thereof are connected to the displacement control actuator 142 and the actuator 132 of the movable test bench 130. Accordingly, the displacement of the actuator 132 is adjusted according to the operation of the displacement adjusting driver 142.

Next, in the environment control step (S130), the environment inside the sealed chamber 110 is controlled by the environment control system 120.

The environmental control system 120 includes a temperature controller to regulate at least the temperature inside the sealed chamber 110. In addition, when the relative humidity inside the sealed chamber 110 is also controlled, a humidity controller is further included.

The temperature controller and/or the humidity controller is connected to the sealed chamber 110 by having a refrigerant circulation system, a fan, and a duct, and controls at least one of temperature and humidity inside the sealed chamber 110 through this. To form the environmental conditions of use.

In order to create an environment, the environment control system 120 may be controlled by a test terminal 150 to be described later, and in an embodiment, a temperature of -20°C to 90°C and a temperature by the chamber controller 121 interlocked with the test terminal 150 Relative humidity 0% ~ 99% can be achieved.

Next, in the reliability evaluation step (S140), the sensing value of the displacement meter sensor DS according to the change in the environment inside the sealed chamber 110 is received through the test terminal 150 and analyzed.

In particular, it is preferable that the reliability evaluation step S140 is a step of evaluating a sensing value of the displacement sensor DS according to environmental changes for different displacements of the displacement sensor DS.

For example, after changing the temperature for a set time in the first displacement state to check the measured value in the displacement meter sensor DS, changing the displacement to the second displacement state, and then varying the temperature for a set time to be used in the displacement meter sensor DS. Repeat the process of checking the measured value.

For this, the test terminal 150 may be a PC or server equipped with an analysis function. In addition, the test terminal 150 may further include a memory and a data logger 151 for storing test condition and result data.

The data logger 151 may be provided integrally with the test terminal 150 composed of a PC or the like, or may be provided as a separate device, and converts the signal output through the cable CA of the displacement meter sensor DS and/or Converted to electrical measured values through an amplifier. The converted electrical measurement value is provided to the test terminal 150 as displacement data.

Accordingly, the present invention tests the operational reliability of the displacement meter sensor DS according to the actual use environment such as temperature and humidity, so that it is possible to evaluate the reliability of data due to environmental influences for the displacement meter sensor DS having various uses and functions. do.

In addition, it is possible to verify the persistence of sensing data over time in an actual environment using the displacement sensor (DS), and to evaluate whether the displacement sensor (DS) performs its normal function in order to secure data reliability under various external conditions.

Hereinafter, a test result according to the reliability evaluation apparatus and evaluation method for each environmental change of the displacement meter sensor according to the present invention will be described.

[Experimental sensor] Displacement sensor (DS) that can measure up to 10mm and its temperature range is -10℃ ~ 60℃, and the displacement sensor (DS), which is notified (information provided), is the subject of the test.

[Experimental conditions] Maintain the temperature from the lowest temperature -10℃ to the highest temperature 60℃ -rise-maintain-fall-maintain (10℃ maintained 1 hour, temperature increased to 60℃ for 2 hours, maintained 1 hour, 2 hours The temperature drop) was set to 1 cycle, and the data in the stationary state was measured for about 3 days in a state where a certain displacement was applied.

[Experiment result]

(1) As shown in FIG. 3, when the displacement to be tested is 0 mm, the displacement controller 140 does not contact the displacement sensor DS and maintains the displacement at zero. In this case, it is detected that the displacement difference according to temperature occurred about 0.5%.

(2) As shown in FIG. 4, when the displacement to be tested is 5 mm, the displacement controller 140 is operated by 5 mm to generate a displacement in the displacement sensor DS and then stop. In this case, it is detected that the displacement difference according to temperature occurred about 0.8%.

(3) As shown in FIG. 5, when the displacement to be tested is 10 mm, the displacement controller 140 is operated by 10 mm to generate a displacement in the displacement sensor DS, and then stop. In this case, it is detected that the displacement difference according to temperature occurred about 1.8%.

Therefore, by adjusting the temperature for each displacement of the displacement sensor DS, it can be determined whether the displacement value sensed (detected) by the displacement sensor DS matches the specifications of the provider who requested the test of the displacement sensor DS. Etc. can also be added to the test conditions.

In the above, specific embodiments of the present invention have been described above. However, the spirit and scope of the present invention are not limited to these specific embodiments, but various modifications and variations are possible within the scope of not changing the subject matter of the present invention. You will understand when you grow up.

Therefore, the embodiments described above are provided to completely inform the scope of the invention to those of ordinary skill in the technical field to which the present invention belongs, and should be understood as illustrative and non-limiting in all respects, The invention is only defined by the scope of the claims.

110: sealed chamber
111a: first gate
111b: second gate
112a, 112b: sealing (rubber stopper)
120: environmental control system
130: operation test bench
140: displacement regulator
150: test terminal
151: data logger

Claims (7)

A closed chamber 110 in which a test of the displacement sensor DS is conducted and is blocked from an external environment;
An environment control system 120 for controlling an environment inside the sealed chamber 110;
A movable test bench 130 installed inside the sealed chamber 110 and supporting the displacement sensor DS in a displaceable manner;
A displacement controller 140 for adjusting the displacement of the movable test table 130; And
Including; a test terminal 150 for receiving and analyzing a sensing value of the displacement meter sensor DS according to a change in the environment inside the sealed chamber 110;
The movable test bench 130,
An installation table 131 supporting the displacement sensor DS; And
One end is supported by the mounting table 131, and the displacement meter sensor DS is mounted at the other end, and a center drive is performed to generate displacement of the displacement meter sensor DS by axial movement within a set range. Includes; an actuator 132 made,
The test terminal 150,
Reliability evaluation device for each environment change of the displacement sensor sensor, characterized in that the environment changes according to time for each of the different displacements of the displacement sensor (DS) and evaluates a sensing value of the displacement sensor (DS). The method of claim 1,
The sealed chamber 110,
A first gate 111a through which one end of the displacement controller 140 installed outside the sealed chamber 110 is inserted; And
Including; a second gate 111b through which the cable CA for transmitting the measured value of the displacement meter sensor DS is drawn out;
The first and second gates 111a and 111b are provided with seals 112a and 112b for blocking the sealed chamber 110 from the external environment, respectively. Evaluation device. The method of claim 1,
The environmental control system 120,
A temperature controller for controlling the temperature inside the sealed chamber 110; And
A humidity controller for controlling the humidity inside the sealed chamber 110; Reliability evaluation device for each environmental change of the displacement sensor, characterized in that it comprises at least one or more of. delete delete A sensor mounting step (S110) of mounting a displacement meter sensor (DS) to be tested on the movable test bench 130 installed inside the sealed chamber (110);
A displacement adjusting step (S120) of adjusting the displacement of the displacement meter sensor (DS) mounted on the movable test table (130) by a displacement controller (140);
An environmental control step (S130) of adjusting the environment inside the sealed chamber 110 with the environment control system 120; And
Reliability evaluation step (S140) of receiving and analyzing a sensing value of the displacement meter sensor (DS) according to a change in the environment inside the closed chamber 110 through the test terminal 150 (S140); including,
The displacement adjustment step (S120),
It is a step in which the shaft is driven to generate displacement of the displacement sensor DS by performing axial movement within the range set by the movable test table 130,
The reliability evaluation step (S140),
And evaluating the sensing value of the displacement sensor DS by changing the environment according to time for each different displacement of the displacement sensor DS.
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