KR20120015925A - Apparatus and method for low frequency vibration test of wire terminal - Google Patents

Abstract

PURPOSE: A low frequency vibration test device and method for wire connector assessment are provided to check influence of the vibration of a low frequency area on a wire connector pressure part by measuring voltage or resistance. CONSTITUTION: A vibration generator(110) generates the vibration of a low frequency area. A vibration stand(111) is combined with a wire of a measurement wire connector(101) and transfers the vibration which is provided from the vibration generator. A connecting terminal for test(104) is connected to the measurement wire connector for current application. A current transformer(120) is connected in order to apply a current between the measurement wire connector and the connection terminal for the test. A measuring device(130) is connected in order to measure resistance or voltage between the measurement wire connector and the connection terminal for the test.

Description

Apparatus and method for low frequency vibration test of wire terminal}

The present invention relates to a wire terminal test apparatus and method, and more particularly, to a low frequency vibration test apparatus and method for evaluating a wire terminal configured to enable a low frequency vibration test on a crimp portion of a wire terminal.

As is well known, the airbag system is a device that protects occupants in the vehicle by inflating the airbag instantaneously in the event of a car crash, thereby protecting the occupants of the driver's seat and the passenger seat. It is installed in the instrument panel on the passenger seat side.

In addition, the side-airbag (SAB) system, which is configured by mounting an airbag inside the seat where the driver or the passenger sits, is installed in case of a side collision of the car. The airbag is deployed by protruding outwards through the seat side.

The airbag system as described above is an important safety device that directly protects the driver's or occupant's life in the event of an accident and maintains life, so the reliability of operation is important.

Therefore, it is necessary to test the state of the airbag system in a proper manner, such as whether the airbag system can be operated normally at an accurate time as well as the development stage of the airbag system and the airbag that is in use (durable) in the actual vehicle. .

The airbag system is an electrical system that uses an electrical signal in determining the airbag deployment time or in the actual deployment of the airbag. Therefore, various tests must be performed on the electrical operation as well as the mechanical operation.

In particular, it is necessary to evaluate circuits and wiring damage and defects caused by durable use for a long time, and to find a problem, and to find a problem. For this, an accurate evaluation method and a test apparatus should be established.

FIG. 1 is a view for explaining a problem that an airbag warning light is turned on due to an excessive wiring resistance occurring at a wire terminal or a connector in a side airbag system.

As shown, the side airbag module 2 is embedded in the side surface of the seat 1 so that the side airbag 2a is received by receiving an electrical signal from the airbag control unit ACU 3 in the event of a side collision. In deployment operation, if an excessive resistance of the wiring occurs before deployment operation in the durable state, the airbag warning light 4 may be turned on.

In order to improve the lighting problem of the airbag warning lamp due to excessive wiring resistance, the wiring (5) is arranged at the bottom of the seat (1), but the connector at the bottom of the seat is caused by the interference between the airbag wiring at the bottom of the seat and the seat cross member. May be affected, resulting in over-resistance and resulting warning lights.

Various test evaluations of the side airbag system may be performed for analysis of this problem, and FIG. 2 is a diagram illustrating a reproduction evaluation method using the high-quality seat and the side airbag wiring, and includes a shunt 11 and an oscilloscope ( 12) to apply the ACU diagnostic current (I), and the ACU diagnostic voltage (side airbag system total voltage) for the diagnosis of the side airbags at the front and rear ends thereof, respectively, based on the airbag connector 13 at the bottom of the seat (V1). ) And the voltage (V2) on the squib side, and the voltage drop (V1-V2) by the connector on the lower end of the sheet is analyzed.

Here, the ACU diagnostic resistance is 'V1 / I', and the airbag connector side resistance at the bottom of the seat is '(V1-V2) / I'.

In FIG. 2, reference numeral 14 denotes a squib side connector.

In addition, as a reproducible evaluation method through the seat evaluation mode, the sliding durability of the seat confirms that the resistance of the seat bottom airbag connector increases as the number of sliding increases, thereby confirming the influence of the interference between the seat bottom wiring and the cross member. Can be.

In addition, through the six-axis vibration endurance evaluation it is possible to check the resistance change of the lower connector side of the seat in a specific frequency band, through which the impact of the vibration of the seat can be confirmed.

In addition, it is possible to carry out a rise / fall endurance evaluation to evaluate the effects of seat cushion and seatback load load.

In addition, by checking the wiring of the high quality side airbags and airbag lead wires, it is possible to check whether the high quality side airbags are unsatisfied with the lead wire clamping force, etc. Check for abnormality of connector and terminal crimping part through terminal X-ray inspection, and other inspection of terminal plating (check exposure color of grounding due to wear of contact part in color), and check crimping of terminal of side airbag lead wire side In order to do this, we check the wire fixation force.

In addition, as shown in Fig. 3, the terminal airbag (SAB) side terminal crimp resistance (R1), the terminal-to-terminal contact resistance (R2), and the wiring side terminal crimp resistance (R3) are measured and the voltage drop (R1 + R2 + R3) is measured therefrom. You can analyze and check whether the specification is satisfied.

However, conventional test apparatus or methods cannot measure the wiring resistance values, such as terminals and connectors of the side airbag system, in a frequency band lower than a specific frequency (for example, 10 Hz).

In the low frequency region, the resistance value is related to the wire fixation force. Therefore, it is necessary to verify the terminal crimping part for low frequency to analyze the cause of the excessive resistance. Therefore, the wire terminal crimping part is tested in the low frequency vibration condition. There is a desperate need for a solution.

Accordingly, the present invention is invented to solve the above problems, the voltage between the front end and the rear end of the wire terminal crimping portion in the state in which low-frequency vibration is applied to the wire connected to the wire terminal for verification of the wire terminal crimping portion due to the low frequency vibration Alternatively, the low frequency vibration test apparatus for wire terminal evaluation, which is configured to enable a low frequency vibration test for measuring resistance, by measuring voltage or resistance to determine the effect of vibration in the low frequency region, which has not been conventionally considered, in the wire terminal crimp. And to provide a method.

In order to achieve the above object, the present invention, a vibration generator for generating and providing vibration in the low frequency region; A shaking table coupled with a wire of a measuring wire terminal to transmit the vibration provided from the vibration generator; A test connection terminal connected to the measurement wire terminal for current application; An ammeter connected to apply a current between the measurement wire terminal and the test connection terminal; A measuring device connected to measure a resistance or voltage between the measuring wire terminal and the test connection terminal in a current application state; It provides a low-frequency vibration test apparatus for a wire terminal evaluation comprising a; temperature control chamber for imparting a temperature condition in the state that the measuring wire terminal and the test connection terminal connected thereto.

In another aspect, the present invention comprises the steps of connecting the test connection terminal to the measurement wire terminal and positioning in the temperature control chamber; Applying a vibration in a low frequency region provided by the vibration generator to a wire of a measuring wire terminal through a shaking table at a set temperature condition in a temperature control chamber and applying a current between the measuring wire terminal and the test connection terminal using an ammeter; Measuring a resistance or voltage between the measurement wire terminal and the test connection terminal using a measuring device while applying the temperature condition, low frequency vibration and current; And evaluating a state of the measurement wire terminal using the measured resistance value or the resistance value calculated from the measured voltage.

Accordingly, according to the low frequency vibration test apparatus and method for evaluating the wire terminal according to the present invention, for verifying the wire terminal crimping portion due to low frequency vibration, the front end and the rear end of the wire terminal crimping portion in the state in which low frequency vibration is applied to the wire connected to the wire terminal. By configuring the low frequency vibration test to measure the voltage or resistance of the liver, it is possible to determine the effect of the vibration of the low frequency region, which has not been considered in the past, by measuring the voltage or the resistance.

1 is a view for explaining a problem that the airbag warning light is turned on due to excessive wiring resistance in the conventional side airbag system.
2 is a view showing a reproduction evaluation method using a conventional high quality seat and side airbag wiring.
3 is a view illustrating a method for measuring and analyzing terminal resistance in a conventional side airbag system.
It is a figure which shows the structure of the low frequency vibration test apparatus for wire terminal evaluation which concerns on this invention.
5 is a view for explaining a wire connection method between the current and the measuring device in the use of the low frequency vibration tester for evaluating the wire terminal according to the present invention.
6 is a connection state diagram schematically illustrating a terminal connection state when testing a plurality of measurement wire terminals in the low frequency vibration test apparatus for wire terminal evaluation according to the present invention.
7 is a view showing an embodiment of a jig device for fixing the measurement wire terminal and the test connection terminal connected in series as shown in FIG.
8 is a view showing vibration conditions and temperature conditions in the low frequency vibration test method for evaluating the wire terminal according to the present invention.
9 is a view showing an aging temperature condition to be carried out before the low frequency vibration test for wire terminal evaluation according to the present invention.
10 is a view for explaining the element causing the resistance change in the low frequency vibration test evaluation according to the present invention.
11 is a view for explaining the resistance change obtained from the measurement result and the evaluation method using the same in the low frequency vibration test process according to the present invention.
12 is a diagram illustrating actual data collected through a low frequency vibration test process according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

The present invention relates to a low frequency vibration test apparatus for evaluating a wire terminal, wherein a front end and a rear end of a wire terminal crimp part are applied in a state in which low frequency vibration is applied to a wire crimped to a terminal body (terminal) for verification of a wire terminal crimp part due to low frequency vibration. The low frequency vibration test for measuring the voltage or resistance of the liver is configured to enable low frequency vibration for wire terminal evaluation by measuring the voltage or the resistance of the low frequency region vibration, which has not been considered in the past, on the wire terminal crimp. A test apparatus and method.

In the course of research to improve the problem of lighting the airbag warning light due to the excessive wiring resistance of the side airbag system, the wiring resistance value of the side airbag system is changed in the low frequency band lower than 10 Hz, Related to the effect of low frequency vibration on the wire terminal crimp where the wire and the terminal body are crimped, thus reducing the need for verification of the wire terminal crimp when vibration is applied in the low frequency region. By completing the present invention, the low frequency vibration test apparatus and method of the present invention can be usefully used to verify the wire terminal crimp used in the side airbag system.

4 is a diagram illustrating a configuration of a low frequency vibration test apparatus for wire terminal evaluation according to an embodiment of the present invention.

As shown, the wire 102 and the terminal body (terminal) 103 is a crimped portion of the wire terminal (hereinafter referred to as a measurement wire terminal) 101 of the measurement object that is bonded and bonded After inserting the terminal body 103 into the connector 150, the connector 150 is fixed by the fixing jig 153 of the jig device 151, and then the test connecting terminal 104 is inserted into the measuring wire terminal 101. It is configured to apply a predetermined low frequency vibration to the wire 102 of the measurement wire terminal 101 after connecting to the wire 102 to measure the state of the low frequency vibration.

In this process, a test evaluation is performed by measuring resistance or voltage between both sides with a current applied to both sides of the measuring wire terminal 101 and the test connection terminal 104, and crimping the measuring wire terminal 101. The resistance, which is present in the crimping portion between the wire 102 and the terminal body 103, is checked to evaluate the wire fixation force in a state where a low frequency vibration condition is applied.

Looking at the configuration, the low-frequency vibration test apparatus for evaluating the wire terminal according to the present invention, the vibration generator 110 for generating and providing a vibration; A shaking table 111 coupled with the wire 102 of the measuring wire terminal 101 to transmit the vibration provided from the vibration generator 110; A test connection terminal (104) connected to the measurement wire terminal (101) for current application; An ammeter (120) connected to apply a current between the measurement wire terminal (101) and the test connection terminal (104); A measuring device (130) connected to measure a resistance or voltage between the measuring wire terminal (101) and the test connection terminal (104) in a current application state; And a temperature control chamber 140 for imparting a temperature condition in a state where the measurement wire terminal 101 and the test connection terminal 104 connected thereto are inserted.

Here, the measuring wire terminal 101 is a test target wiring part having a structure in which the wire 102 is pressed and coupled to the terminal body 103, and may be a wire terminal used in a side airbag system, and a new low frequency vibration If the test is to be carried out, as described below, in order to simulate the evaluation of the high-end product, which has undergone some durability due to its use in a vehicle, the new product can be used by aging under a specific condition. To analyze the occurrence of problems due to vibration).

That is, the aging process is a problem caused by excessive resistance in the high-quality wire terminal, the durability of the airbag warning lamp is a long-term use in the vehicle for a long period of use in the vehicle, so as to age the new measurement wire terminal 101 as necessary It is a process for.

As described above, in the low frequency vibration test process, the test is performed by using the wire terminal 101 that is pressed and coupled to the terminal body 103 by the wire 102, and the terminal body 103 of the measurement wire terminal 101 is measured. After inserting into the connector 150, the connector 150 is fixed to the external fixed structure to be tested.

The vibration generator 110 and the shaking table 111 are components for applying the vibration of the low frequency region to the wire 102 of the measurement wire terminal 101. The vibration generator 110 generates and outputs the vibration of the desired low frequency region. A general vibration generator 110 that can be used can be used, and the vibration table 111 coupled to the wire 102 of the measurement wire terminal 101 is moved up and down to apply vibration.

As the vibration generator 110, if it can generate and output low frequency vibration of 10 Hz or less, especially low frequency vibration of 1 Hz (once and up once in a second, see Fig. 8), it is adopted without particular limitation in configuration in the present invention Can be used.

The shaking table 111 is connected to the vibration output side of the vibration generator 110 and transmits the vibration of the low frequency region output from the vibration generator, it is coupled to the wire 102 of the measurement wire terminal 101.

The test connection terminal 104 is a terminal provided to be electrically connected to the measurement wire terminal 101. Since the current must be applied to the measurement wire terminal 101, the test connection terminal 104 is connected to the measurement wire terminal 101. ), A current is applied between both the wire 105 of the test connection terminal 104 and the wire 102 of the measurement wire terminal 101.

As described above, the component for applying the current so that the current can be conducted between the two sides is an ammeter 120, and is electrically connected to the wires 102 and 105 of both terminals to apply a predetermined current (for example, 100 mA) to conduct electricity.

In addition, a measuring device 130 for measuring resistance or voltage in a state where current is conducted between both terminals is provided, and the measuring device 130 may use an oscilloscope.

4 is a diagram illustrating a state in which a low frequency vibration test is connected to a single measuring wire terminal 101 so that a single measuring wire terminal 101 may be connected to a test apparatus to perform a test. However, it is also possible to test by connecting a plurality of measuring wire terminals 101 in series.

In connecting the single measuring wire terminal 101, the shaking table 111 is connected to the wire 102 of the measuring wire terminal 101 at a predetermined distance L1 from the end of the connector 150.

In addition, one side of the two measuring wires of the measuring device 130 is connected to the wire 102 of the measuring wire terminal 101 with a shake table 111 and a predetermined distance (L2).

In addition, one side of the two current applying wires of the ammeter 120 is connected to the wire 102 of the measurement wire terminal 101 at a predetermined distance L3 from a position where one side of the measuring wire of the measuring device 130 is connected. .

5 is a diagram illustrating a setting example of L1, L2, and L3.

It is also possible to eliminate the resistance present between the wire 105 constituting the test connection terminal 104 and the terminal body 106 which is press-coupled, that is, voltage drop can be prevented. It is preferable to connect the other side of the measurement wire directly to the terminal body 106 of the test connection terminal 104.

In connecting the current application wire of the ammeter 120 to the wire 102 of the measurement wire terminal 101 and the wire 105 of the test connection terminal 104, soldering is performed to prevent voltage drop. Soldering), and the voltage drop also occurs when the measuring wire of the measuring device 130 is connected to the wire 102 of the measuring wire terminal 101 and the terminal body 106 of the test connecting terminal 104. In order to prevent this, it is preferable to connect by soldering.

In order to simultaneously test a plurality of measurement wire terminals 101, the measurement wire terminal 101 and the test connection terminal 104 are connected in series as shown in FIG.

6 is a connection state diagram schematically illustrating a terminal connection state when testing a plurality of measurement wire terminals 101 in a low frequency vibration test apparatus for evaluating a wire terminal according to the present invention.

FIG. 7 is a view showing an embodiment of the jig device 151 for fixing the measurement wire terminal 101 and the test connection terminal 104 connected in series as shown in FIG. 6, and the measurement wire terminal 101 and the test connection. The measurement wire terminal (in the state in which the plurality of connectors 150 to which the terminals 104 are connected to each other is fixed to the fixing jig 153, which is a fixed structure fixedly installed on the jig device 151 at predetermined intervals, is fixed thereon). The low frequency vibration is simultaneously applied to the wire of 101).

At this time, the wires of the measuring wire terminal 101 are connected to the jig device 151 while the connector 150 to which the plurality of measuring wire terminals 101 and the test connection terminal 104 are connected is fixed to the fixing jig 153. The upper shaking table 112 horizontally arranged at a predetermined height from the pedestal is arranged in parallel with each other.

Referring to FIG. 7, a fixing jig (fixed structure) is used to fix a connector 150 into which a plurality of measuring wire terminals 101 are inserted in a state in which a plurality of measuring wire terminals 101 and a test connection terminal 104 are connected in series. 153, wherein at this time, the wires of each measuring wire terminal 101 are fixed in the side by side to fix the connector 150, and the wires extending in the side direction are arranged in a horizontal direction. It can be seen that the state is commonly coupled to the shaking table 112 in the lateral direction, and simultaneously applying the vibration output from the vibration generator through the upper shaking table 112 to the parallel wires.

The upper shaking table 112 which is coupled in a transverse direction with respect to each wire has a structure assembled to vibrate integrally with the lower shaking table 113 installed vertically on the pedestal, and the lower shaking table 113 is a pedestal of the jig device 151. 152 is connected to a vibration generator (not shown in FIG. 7) disposed below, and transmits the vibration output from the vibration generator to the upper vibration table 112.

Accordingly, the low frequency vibration provided by the vibration generator is sequentially transmitted to the lower shaking table 113 and the upper shaking table 112 so that low frequency vibration in the vertical direction can be applied to each wire, and at this time, a position of a certain distance from the connector 150 is provided. In the shaking table 111 to vibrate the wires of each measuring wire terminal 101.

As described above, in the low frequency vibration test apparatus including a jig device 151 configured to be capable of testing a plurality of wire terminals, the wires of the ammeter 120 and the meter 130 are soldered to the corresponding portions and connected thereto. As described.

The configuration of the low frequency vibration test apparatus according to the present invention has been described above. Hereinafter, the process of performing the low frequency vibration test on the measurement wire terminal using the same will be described below.

In the low frequency vibration test process according to the present invention, low frequency vibration and current application, temperature condition application, resistance or voltage measurement are performed simultaneously.

A method of applying low frequency vibration is described. After inserting the terminal body 103 of the measuring wire terminal 101 into the connector 150 fixed to the fixing jig 153, the measuring wire inserted into the connector 150 is inserted. The test connection terminal 104 is connected to the terminal body 103 of the terminal 101.

Subsequently, the vibration generator 110 is driven in the temperature control chamber 140 while the shaking table 111 is coupled to the wire 102 of the measurement wire terminal 101 to measure the low frequency vibration output from the vibration generator 110. It is applied to the wire 102 of the wire terminal 101.

At the time of applying the vibration, the cycle is repeated as a cycle having a pause for a predetermined time without vibration after applying the low frequency vibration at a predetermined time and frequency.

As an example of the method of applying the vibration, as shown in Figure 8 has a pause for stopping the vibration for 15 minutes after applying the vibration for 1 second, using a cycle as a total of 720 cycles (total 180 hours) Will be authorized.

At this time, as described above, the wire of the 100mm position (L1 in FIG. 5) from the end of the connector 150 is coupled to the shaking table 111, and then applied vibration of up and down amplitude ± 25mm at this point (Fig. 8). Have a 15 minute rest period (1 second vibration of ± 25mm up and down for 1 second and stop for 15 minutes).

The resting period is to give time to cause oxidative corrosion when the terminal crimp core is damaged by vibration.

In addition, while applying the low frequency vibration and current to the measurement wire terminal 101 in the temperature control chamber 140, while creating a predetermined temperature condition to measure the resistance or voltage, while the low frequency vibration and current is applied to the set temperature and setting The cycle is repeated with one cycle of the process of leaving it at low temperature for a period of time and then leaving it at a high temperature.

At this time, as an example of a method for imparting a temperature condition, a total of 30 cycles for 1 hour 6 cycles (180 hours in total), the temperature control chamber 140 to induce environmental durability progress for the terminal crimping unit The temperature conditions are given by leaving it at 23-80 ° C temperature conditions within.

That is, the temperature is left at 23 ° C. under low temperature for 1 hour for 1 cycle and then maintained at 80 ° C. under high temperature for the remaining 5 hours.

In addition, if the measurement wire terminal 101 is a new product before the low frequency vibration test, as shown in Fig. 9 for the aging, a separate aging to be left for a predetermined time under a predetermined temperature condition is performed.

That is, when the airbag warning lamp lighting problem occurs due to excessive wiring resistance in the side airbag system, it occurs after some durability, not a new product at the beginning of production, so aging is necessary for the new measuring wire terminal. Aging is performed by repeating the process of leaving the terminal 101 in the temperature control chamber 140 with the test connection terminal 104 in a predetermined hot and cold condition for a predetermined time.

As an example, as shown in FIG. 9, a total of 100 cycles is performed with 1 cycle of being left at 125 ° C. for 30 minutes and then left at -40 ° C. for 30 minutes, and the measurement wire terminal in the temperature control chamber 140 is subjected to aging. (101) and the test connection terminal 104 is connected to the ammeter 120 to continuously apply current.

As described above, the resistance or voltage is measured using the measuring device 130 while applying a current through the ammeter 120 in a state in which vibration conditions and temperature conditions are applied. FIG. 10 is a low frequency vibration test evaluation according to the present invention. Is a diagram for explaining the element causing the resistance change.

As shown, the factors that cause the resistance change in the low frequency vibration evaluation process include: ① wire resistance of the wire, ② resistance of the crimp portion of the measuring wire terminal (compression resistance between the wire and the terminal body), ③ connection of the measuring wire terminal and the test terminal. Contact resistance between terminals (contact resistance between terminals), ④ crimp resistance (connection resistance between wire and terminal body) of test connector.

Among these, the wire resistance of the wire can be ignored because the length of the wire is short and the core wire is not exposed to the outside except at connection points of the ammeter and the measuring device.

In addition, the resistance of the measurement wire terminal is continuously applied to the crimped part by low frequency vibration, so that the resistance change occurs during the measurement. However, the contact resistance between the terminals is fixed so that the resistance change can be ignored because there is no wear phenomenon caused by the vibration.

In addition, the resistance of the crimp part of the test connection terminal is directly connected by soldering the measuring wire of the measuring device to the terminal body, so that even if the crimp between the wire and the terminal body is corroded, the resistance change between the wire and the terminal body is not affected. In other words, the crimp resistance of the test connection terminal can also be ignored.

In short, a test is performed to measure the resistance or voltage at the same time as the current is applied, and the resistance or voltage is measured by simultaneously applying the vibration and temperature conditions described above, and the resistance change is calculated from the measured resistance value or the resistance value calculated from the measured voltage. Check to determine the good and bad condition of the measuring wire terminals.

11 is a view for explaining the resistance change obtained from the measured values collected in the low frequency vibration test process according to the present invention and the evaluation method using the same, Figure 12 is a view showing the actual data collected through the low frequency vibration test process according to the present invention The illustrated figure.

As shown in FIG. 11, the low temperature change (23 ° C.) shows a low resistance change during each cycle based on the temperature condition, but the resistance change increases after the temperature is raised to the high temperature condition (80 ° C.).

While repeating the predetermined cycle (30 cycles of temperature conditions) (for a total of 180 hours), the resistance repeatedly fluctuates as shown in FIG. 11, and the following three things are confirmed from the resistance change amount.

In other words, the resistance value measured in the low temperature condition is used, but the initial resistance deviation (ΔR1) between the measurement wire terminals, and the difference between the final resistance value and the initial resistance value (represented in the low temperature condition during the entire cycle for each measurement wire terminal) ΔR2) and the difference between the maximum resistance value and the initial resistance value ΔR3 that appear under low temperature conditions during the entire cycle for each measurement wire terminal 101 are checked.

Here, ΔR1 is for checking the measuring wire terminal which is defective before the test, ΔR2 is for checking how much the resistance change occurs after the end of the test, and ΔR3 is during the test because the resistance may decrease while the test is completed. This is to check whether the resistance increased rapidly.

At this time, the reference values of ΔR1, ΔR2, and ΔR3 are set in consideration of the excessive resistance area according to the characteristics of the component in which the measuring wire terminal is used, for example, the characteristics of the side airbag component, and then the calculated ΔR1, ΔR2 and ΔR3 are compared with a reference value to determine whether the test product is good or bad.

ΔR1 is the deviation between this reference value and the initial resistance value of the other measurement wire terminal using the initial resistance value of the measurement wire terminal having the lowest initial resistance value as a reference value.If the reference value is exceeded, a measurement wire terminal having a high initial resistance value is defective. Will be determined.

FIG. 12 shows the resistance change obtained at low frequency vibration condition and temperature condition using the wire terminal used in the side airbag system. In the case of a good test product, the overall resistance value state is generally constant except for a part in which noise is generated. It can be seen that, if it is bad, the resistance value is excessively increased.

Thus, according to the low frequency vibration test apparatus and the test method according to the present invention, as an evaluation method that can reproduce the excessive wiring resistance phenomenon of the vehicle in which a problem (for example, the airbag warning light is turned on due to excessive resistance), The performance of the terminal crimp can be verified for the extended area, and the cause of the problem can be identified for the existing problem vehicles.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. Modified forms are also included within the scope of the present invention.

101: measuring wire terminal 104: test connection terminal
10: vibration generator 111: shaking table
120: ammeter 130: measuring instrument
140: temperature control chamber 150: connector
151: jig device 153: fixed jig

Claims (11)

A vibration generator 110 generating and providing vibration in a low frequency region;
A shaking table 111 coupled with the wire 102 of the measuring wire terminal 101 to transmit the vibration provided from the vibration generator 110;
A test connection terminal (104) connected to the measurement wire terminal (101) for current application;
An ammeter (120) connected to apply a current between the measurement wire terminal (101) and the test connection terminal (104);
A measuring device (130) connected to measure a resistance or voltage between the measuring wire terminal (101) and the test connection terminal (104) in a current application state;
A temperature control chamber 140 for imparting a temperature condition in a state where the measurement wire terminal 101 and the test connection terminal 104 connected thereto are inserted;
Low frequency vibration test apparatus for wire terminal evaluation comprising a.
The method according to claim 1,
A connector 150 into which the terminal body 103 of the measuring wire terminal 101 is inserted;
Jig device 151 for fixing the position of the connector 150;
Further comprising a low-frequency vibration test apparatus for wire terminal evaluation, characterized in that for connecting the test connection terminal 104 to the measurement wire terminal 101 in a fixed state of the connector (150).
The method according to claim 2,
The jig device 151 is fixed to fix the plurality of connectors 150 in a state in which a plurality of measurement wire terminals 101 and a plurality of test connection terminals 104 connected to each measurement wire terminal 101 are connected in series. Jig 153,
The shaking table 111 is disposed at a predetermined distance from the fixing jig 153 so that the shaking table 111 vibrates the wires of the respective measuring wire terminals 101 at a predetermined distance from the connector 150. Low frequency vibration test apparatus for wire terminal evaluation, characterized in that.
Connecting the test connection terminal to the measurement wire terminal and placing the test terminal in the temperature control chamber;
Applying a vibration in a low frequency region provided by the vibration generator to a wire of a measuring wire terminal through a shaking table at a set temperature condition in a temperature control chamber and applying a current between the measuring wire terminal and the test connection terminal using an ammeter;
Measuring a resistance or voltage between the measurement wire terminal and the test connection terminal using a measuring device while applying the temperature condition, low frequency vibration and current;
Evaluating the state of the measurement wire terminal using the measured resistance value or the resistance value calculated from the measured voltages;
Low frequency vibration test method for wire terminal evaluation comprising a.
The method of claim 4,
And a test connector connected to the measurement wire terminal after the connector is fixed to the jig device while the terminal body of the measurement wire terminal is inserted into the connector.
The method according to claim 5,
After fixing the plurality of connectors to the fixing jig in a state in which a plurality of measuring wire terminals and a plurality of test connection terminals connected to each measuring wire terminal are connected in series, each measuring wire is connected through a shaking table at a predetermined distance from the connector. A low frequency vibration test method for evaluating a wire terminal, comprising applying a vibration to a wire of a terminal.
The method of claim 4,
Measure the resistance or voltage between each measurement wire terminal and the test connection terminal while connecting a plurality of measurement wire terminals and a plurality of test connection terminals connected to each measurement wire terminal in series,
In the step of evaluating the state of the measurement wire terminal,
The initial resistance value deviation ΔR1 between the measurement wire terminals, the difference between the final resistance value and the initial resistance value ΔR2 of each measurement wire terminal, and the difference between the maximum resistance value and the initial resistance value ΔR3 of each measurement wire terminal A low frequency vibration test method for evaluating wire terminals, which is compared with a preset reference value.
The method of claim 4,
Aging of a new measuring wire terminal connected to the test connector in the temperature control chamber and the application of current is allowed to stand for a predetermined period of time under the set high and low temperature conditions, respectively. A low frequency vibration test method for evaluating a wire terminal.
The method of claim 4,
The low frequency vibration test method for evaluating the wire terminal, characterized in that to give a temperature condition to repeat the cycle with the process of leaving a high temperature after a low temperature left for a set temperature and a set time while applying the low frequency vibration and current.
The method of claim 4,
The low frequency vibration test method for evaluating a wire terminal, characterized in that the cycle is repeated as a cycle having a rest period without vibration for a predetermined time after applying the low frequency vibration at the set time and the set frequency when the low frequency vibration is applied.
The method of claim 4,
Low-frequency vibration test method for wire terminal evaluation, characterized in that for connecting the measuring wire of the measuring device to the wire of the measuring wire terminal and the terminal body of the test connection terminal, respectively.

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