KR20160015047A - Apparatus for voltage characteristic test of aircraft device - Google Patents

Abstract

According to one embodiment of the present invention, the present invention relates to an apparatus for testing a power characteristic of an aircraft device. The technical idea to be solved is to test power characteristics by shutting off power at a predetermined interval during an environment test of an aircraft device. To achieve the purpose, one embodiment of the present invention comprises: a first SMPS fixing the input power to output a first supply voltage and a second supply voltage; a second SMPS varying the input power to output a third supply voltage and a fourth supply voltage; and a timer operated by receiving the first supply voltage and supplying the third supply voltage to a line replaceable unit (LRU) in accordance with on-off time and the controlled number of times; and a power measurement device checking the third supply voltage and the fourth supply voltage supplied from the timer and the second SMPS, respectively.

Description

[0001] APPARATUS FOR VOLTAGE CHARACTERISTIC TEST OF AIRCRAFT DEVICE [0002]

An embodiment of the present invention relates to an apparatus for testing a power supply characteristic of an aviation equipment for testing a power supply characteristic during an environmental test of aviation equipment.

Aircraft are equipped with Line Replaceable Units (LRUs) for each major operational function such as landing gear control, weather radar or fuel management.

However, as the aircraft becomes larger, the LRU is independently configured with a power supply for supplying operating power to each load element constituting the LRU.

The power supply unit converts the input commercial power into a voltage required by the load element, and supplies the converted power to the LRU so that stable operation of the LRU can be provided.

Such a power supply apparatus has a risk that a reference value is changed according to the environmental conditions and the durability of parts during long-term use, and that reliability and serious failure may occur when the power supply is not managed occasionally or periodically.

However, there is a disadvantage in that it is not possible to detect or predict a detailed state of the power supply apparatus because no separate apparatus for measuring the state of the power supply apparatus is provided.

Patent Document No. 10-2013-0050028 'Power Supply Performance Diagnosis System' Open Utility Model No. 97-25030 " Power Supply Characteristic Test Apparatus "

One embodiment of the present invention provides an apparatus for testing a power supply characteristic of an aviation equipment that performs power supply cutoff at a predetermined interval during environmental testing of aviation equipment.

The apparatus includes a first SMPS for outputting a first supply voltage and a second supply voltage by fixing an input power source; A second SMPS for varying an input power and outputting a third supply voltage and a fourth supply voltage; A timer driven to receive the first supply voltage and supplying the third supply voltage to the line replaceable unit (LRU) by adjusting the on / off time and the number of times; And a power meter for checking a third supply voltage and a fourth supply voltage supplied from the timer and the second SMPS, respectively.

At least one input key may be connected between the first SMPS and the timer, and the second supply voltage may be supplied to the at least one input key.

In addition, the present apparatus for testing a power supply characteristic of an aviation equipment may further include a case, a first connector terminal electrically connected to the timer, at least one input key, and the first SMPS is provided on one side of the case, And a second connector terminal electrically connected to the power meter, the LRU, and the second SMPS may be provided on the other side of the case.

The first supply voltage may be +24 VDC and the second supply voltage may be 24V GND.

The third supply voltage may be +28 VDC, and the fourth supply voltage may be 28V GND.

The apparatus for testing the power supply characteristics of aviation equipment according to an embodiment of the present invention can perform the power supply characteristic test of the aviation equipment easily and efficiently by testing the power supply characteristics by performing power cutoff at predetermined intervals during the environmental test of the aviation equipment have.

In addition, the apparatus for testing the power supply characteristics of aviation equipment according to an embodiment of the present invention can be portable, thereby improving the convenience of the administrator's test.

1 is a block diagram schematically showing an apparatus for testing a power supply characteristic of aviation equipment according to an embodiment of the present invention.
FIG. 2 is a view showing an apparatus for testing power supply characteristics of aviation equipment according to an embodiment of the present invention.
FIG. 3 is a view showing a case equipped with an apparatus for testing power supply characteristics of the aviation equipment of FIGS. 1 and 2. FIG.
Fig. 4 is a diagram showing an example of operating conditions of a timer in the power supply characteristic testing apparatus of the aviation equipment of Figs. 1 and 2. Fig.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which those skilled in the art can readily implement the present invention.

FIG. 1 is a block diagram schematically showing an apparatus for testing a power supply characteristic of an aviation apparatus according to an embodiment of the present invention, FIG. 2 is a diagram specifically illustrating an apparatus for testing a power supply characteristic of an aviation apparatus according to an embodiment of the present invention And FIG. 3 is a view showing a case equipped with the apparatus for testing the power supply characteristics of the aviation equipment of FIGS. 1 and 2. FIG. Fig.

Referring to FIGS. 1 and 2, an apparatus 100 for testing a power supply characteristic of aviation equipment according to an embodiment of the present invention is a test apparatus for performing a power supply characteristic test during an environmental test of an aviation electronic equipment, A first SMPS 110, a second SMPS 120, a timer 130, and a power meter 140.

3, the case 101 is formed of a first surface 102, a second surface 103, a third surface 104, and a fourth surface 105, And is electrically connected with the first SMPS 110, the second SMPS 120, the timer 130, the power meter 140, and the LRU (Line-replaceable unit) 150 through a box- In order to perform the power supply characteristic test, a substrate on which electronic elements performing respective functions are mounted, or a single chip or an integrated printed circuit board to perform each function may be provided.

A timer 130 and at least one input key 115 and a first connector terminal 111 electrically connected to the first SMPS 110 are formed on the first surface 102 of the case 101 . The second surface 103, the third surface 104 and the fourth surface 105 of the case 101 are electrically connected to the power meter 140, the LRU 150, and the second SMPS 120, respectively A second connector terminal 121, and a power supply terminal 115c are formed. The present invention does not limit the formation position of the first connector terminal 111 or the second connector terminal 121 or the power supply terminal 115c but may be variously positioned depending on the intention and purpose of the designer of the apparatus have. Also, the first connector terminal 111 and the second connector terminal 121 may be connected to each other via a connector such as AI (analog input), DI (digital input), DO (digital output), RS (Recommend Standard) -xxx, RJxx, Serial Bus, and General Purpose Input / Output (GPIO) standards.

The case 101 having such a structure can be made of a light and durable enclosure box (i.e., an electric plastic box), but the present invention does not limit the kind of the case 101.

The first SMPS 110 fixes and converts the input power and outputs a first supply voltage and a second supply voltage. The first SMPS 110 may be a fixed SMPS (Switching Mode Power Supply) for a timer 130 input power source, and has a power supply voltage specification of 24 VDC. Meanwhile, the input power source may be a commercial power source 220 VAC supplied from an external commercial power source 10.

Also, at least one input key 115 is connected between the first SMPS 110 and the timer 130, and a second supply voltage may be supplied to the input key 115. The input key 115 includes a start key 115a and a reset key 115b for starting and resetting the timer 130 connected through the connection wiring. In the present invention, the case where the input key 115 is implemented as a key button is described as an example, but the present invention is not limited thereto and may be realized by a numeric key and a function selection key.

Meanwhile, the first supply voltage and the second supply voltage output from the first SMPS 110 may be +24 VDC and 24VGND, respectively.

Accordingly, the +24 VDC output voltage from the first SMPS 110 is supplied as the driving voltage of the timer 130, and the 24 V GND output voltage is supplied to the input key 115.

The second SMPS 120 varies the input power and outputs the third supply voltage and the fourth supply voltage. The second SMPS 120 may be a variable SMPS for the input power of the LRU 150 and has a power supply voltage specification of 28 VDC. The second SMPS 120 may vary the input power to input various sizes of power to the LRU 150. For example, the second SMPS 120 varies the commercial AC power to a predetermined range in order to supply voltages of different sizes according to the model of the LRU 150. To this end, the second SMPS 120 may further include a voltage regulator (not shown) for regulating the voltage by a SlideAC method that can vary the secondary voltage in the form of an autotransformer.

Meanwhile, the third supply voltage and the fourth supply voltage output from the second SMPS 120 may be +28 VDC and 28VGND, respectively.

Accordingly, the output voltage of +28 VDC output from the second SMPS 120 is connected to the timer 130 and supplied to the LRU 150, and the output voltage of 28VGND is supplied to the LRU 150.

The timer 130 is driven by receiving a first supply voltage from the first SMPS 110 and is driven by the third supply voltage supplied from the second SMPS 120 according to the on- To the LRU (150). The timer 130 may include a counter to set conditions such as the on-off time and the number of times for interrupting the third supply voltage. For example, the timer 130 may set the operation mode to K (On / Off Delay), the output contact to Normal Close, and the operation time to 50 ms (005 _0.01s ), as shown in FIG.

To implement this operation, the timer 130 may use Autonics, a digital switched LCD timer capable of setting up to 10 ms. The autonics has various output operation mode and time range mode and can provide an optimized solution. It can be used with wide power supply voltage (24-240VAC 50 / 60Hz / 24-240VDC) and simple up / down mode switching function The convenience can be improved and the operation setting can be easily performed by the function operation by the front digital switch. In addition, the autonics can be implemented in a compact size (for example, a length of 74 mm) to contribute to the portability of the present power supply characteristic test equipment.

The timer 130 has a display unit for displaying user setting condition information such as on / off time and frequency, output operation mode, and the like. The display unit may be implemented as a display device such as a liquid crystal display (LCD), a plasma display (PDP), and an organic light emitting diode (OLED) display device so as to display corresponding operation information and result information, do.

Meanwhile, the timer 130, the second SMPS 120, and the LRU 150 may be designed to be connected to Jig-type LRU connection terminals 151 and 152 that provide robust and easy connection and disconnection .

The power meter 140 checks a third supply voltage and a fourth supply voltage supplied from the timer 130 and the second SMPS 120, respectively. That is, the power meter 140 is connected to the connection line between the timer 130 and the LRU 150 and the connection line between the second SMPS 120 and the LRU 150 via the measurement terminal 141 Off time and the number of times the timer 130 is turned on to check the power cut-off characteristic of the LRU 150. That is, the power meter 140 measures and displays an output voltage when the power supplied to the LRU 150 is cut off, thereby allowing the manager to compare the output voltage with a predetermined constant value to determine the power cutoff characteristic . For example, when the output voltage of the power meter 140 is less than a predetermined value, that is, the delay time and the falling time until the voltage falls to 10% or less, the manager may determine that the power cutoff characteristic is poor.

The power meter 140 may measure the output voltage according to a control signal applied from the functional test equipment. In this case, the power meter 140 and the functional test equipment may be connected by GPIB communication or RS-232C communication, The present invention does not limit the connection between the power measurement and the functional test equipment.

The power meter 140 may be any one of a multimeter, a DC ammeter, and a DC voltmeter. In the present invention, the type of the power meter 140 is limited no.

The apparatus 100 for testing the power supply characteristics of the aviation equipment according to an embodiment of the present invention configured as described above tests the power supply characteristics of the aviation equipment by performing the power supply cutoff at predetermined intervals during the environmental test of the aviation equipment, It can be performed simply and efficiently. In addition, the apparatus 100 for testing the power supply characteristics of aviation equipment according to an embodiment of the present invention can be portable, thereby improving the convenience of the test of the manager.

On the other hand, the case 101 of the power supply characteristic testing apparatus 100 of the aviation equipment is made of a polypropylene resin composition having excellent impact resistance.

The polypropylene resin composition comprises 0.01 to 0.5 parts by weight of an antioxidant and 0.01 to 0.5 parts by weight of a catalyst neutralizing agent based on 100 parts by weight of the polypropylene resin.

The polypropylene resin includes two or more ethylene-propylene random copolymers having different ethylene contents.

It is preferable that the polypropylene resin has a melt index of 1 to 10 g / 10 min. If the melt index is less than 1 g / 10 min, the extrusion load is high when the film is molded. If the melt index is more than 10 g / 10 min Bubble stability and thickness uniformity are deteriorated and are not suitable for use in the final product.

Wherein the polypropylene resin comprises 30 to 70 parts by weight of a first ethylene-propylene random copolymer having a relatively low ethylene content and 30 to 70 parts by weight of a second ethylene-propylene random copolymer having a relatively high ethylene content -Propylene random copolymer. When the amount is less than 30 parts by weight, transparency is deteriorated. When the amount is more than 70 parts by weight, heat resistance is deteriorated.

It is preferable that the first ethylene-propylene random copolymer has an ethylene content of 0.5 to 4 wt% and the second ethylene-propylene random copolymer has an ethylene content of 5 to 15 wt%. When the content of ethylene is less than 0.5 wt% If the content exceeds 15% by weight, heat resistance of the final film deteriorates, which is not preferable.

The antioxidant preferably contains 0.01 to 0.5 parts by weight based on 100 parts by weight of the polypropylene resin. When the amount of the antioxidant is less than 0.01 part by weight, it is difficult to ensure the heat stability during sterilization of the film. When the amount of the antioxidant exceeds 0.5 parts by weight, It may become a problem in economical efficiency.

More specifically, as the antioxidant, conventionally known antioxidants can be used, specifically, tetrakis (methylene (3,5-di-t-butyl-4-hydroxy) hydrosilylate), and 1,3 , Phenol-based antioxidants such as 5-trimethyl-tris (3,5-di-t-butyl-4-hydroxybenzene) and the like, and phosphites such as tris (2,4- Based antioxidant and at least one selected from the group consisting of antioxidants.

The amount of the catalyst neutralizing agent is preferably 0.01 to 0.5 part by weight based on 100 parts by weight of the polypropylene resin. When the amount of the catalyst neutralizing agent is less than 0.01 part by weight, the amount of the catalyst neutralizing agent is too small to remain in the polymer. It is undesirable because it is difficult to neutralize in the case of remaining, and when it exceeds 0.5 part by weight, it may be eluted into the film surface, which is not preferable.

More specifically, the catalyst neutralizing agent can be conventionally used in a known catalyst, and specifically, it is preferable to use calcium stearate or synthetic hydrotalcite.

As described above, the present invention is not limited to the above-described embodiments, but rather may be applied to other types of apparatuses such as the present invention It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

10: commercial power supply unit 100: power characteristic test apparatus
101: case 102, 103, 104, 105: first surface, second surface, third surface, fourth surface
110: first SMPS 111: first connector terminal
115: input key 120: second SMPS
121: second connector terminal 130: timer
140: Power meter 141: Measurement terminal
150: LRU 151, 152: LRU connection terminal
160: Controller

Claims (5)

A first SMPS for fixing the input power and outputting a first supply voltage and a second supply voltage;
A second SMPS for varying an input power and outputting a third supply voltage and a fourth supply voltage;
A timer driven to receive the first supply voltage and supplying the third supply voltage to the line replaceable unit (LRU) by adjusting the on / off time and the number of times; And
And a power meter for checking a third supply voltage and a fourth supply voltage supplied from the timer and the second SMPS, respectively.
The method according to claim 1,
Wherein at least one input key is connected between the first SMPS and the timer and the second supply voltage is supplied to the at least one input key.
The method of claim 2,
Further comprising a case,
A first connector terminal electrically connected to the first SMPS is provided on one side of the case, the timer, at least one input key,
And a second connector terminal electrically connected to the power meter, the LRU, and the second SMPS are provided on the other side of the case.
The method according to claim 1,
Wherein the first supply voltage is +24 VDC and the second supply voltage is 24VGND.
The method according to claim 1,
Wherein the third supply voltage is +28 VDC and the fourth supply voltage is 28VGND.

Images