KR102401817B1 - Wireless device for object detection sensor with microminiaturize antenna - Google Patents

Abstract

A wireless device for an object detection sensor with a microminiaturized antenna of the present invention can be proper for enhancing gains and radiation efficiency even when a curved-type microminiaturized antenna is provided on a separate printed circuit board installed on a main board when the device is applied to an LED lighting device, can minimize frequency interference that can be generated in electrical components of the main board by having a fixing body that can stably support and mount the printed circuit board, and can prevent a short circuit that can be generated by static electricity by having a separate resistance unit on the printed circuit board.

Description

Wireless device for object detection sensor with microminiaturize antenna

The present invention relates to a wireless device for an object detection sensor equipped with a miniature antenna, and more particularly, when applied to an LED lighting fixture, a curved miniature antenna on a separate printed circuit board installed on the main board. Even if equipped, to be suitable for increasing gain and radiation efficiency, and to provide a fixed body capable of stably supporting and mounting the printed circuit board to minimize frequency interference that may occur in electronic components of the main board And, it relates to a wireless device for an object detection sensor equipped with a miniature antenna that is provided on a printed circuit board with a separate resistor to prevent a short circuit that may be caused by static electricity in advance.

With the development of wireless communication technology, antenna technology is also developing through various changes, and wireless communication devices must include an antenna. Built-in antennas are in the spotlight.

Accordingly, the conventional built-in antenna shown in the accompanying drawings has a structure in which a radiation pattern 2 is formed on one surface of the carrier 1, and the radiation pattern 2 is also formed by press working, and an LDS ( It was sometimes formed using the LDS: Laser Direct Structure method, and was also formed by the PDS (Printing Direct Structure) method.

In particular, the radiation pattern 2 is also formed in an inverted F-type antenna or an inverted L-type antenna structure, the radiation pattern 2 on the upper surface of the carrier 1 ) is formed as an inverted F-type antenna, and in the inverted F-type antenna structure, the power supply terminal 3 and the ground terminal 4 are in contact with the power supply part (not shown) and the ground part (not shown) of the main PCB to conduct electricity. A structure capable of extending the power supply terminal 3 and the ground terminal 4 to the opposite surface of the surface on which the radiation pattern 2 is formed was required.

To this end, a structure in which the power supply terminal 3 and the ground terminal 4 connected from the radiation pattern 2 extend along the side surface of the carrier 1 to the rear surface was used.

However, since a part of the radiation pattern 2 must be formed to extend to the side of the carrier 1, there is a limitation in freely designing the radiation pattern 2, and in order to improve the frequency band or performance of the antenna, the radiation pattern It is advantageous to remove the design restrictions in (2) and to be able to manufacture it in various forms, but there is a problem that it is not.

In addition, the conventional antenna uses a patch antenna, and in the case of the patch antenna, it was difficult to design a mixer circuit pattern, and there was a considerable difficulty in reducing the size of the module.

Therefore, when the size of the patch antenna is reduced and the direction is changed to be applied to various electronic products that are becoming increasingly miniaturized, there is a problem in that the antenna gain and radio wave output are lowered. Also, the patch antenna has a disadvantage in that the frequency bandwidth is narrow.

On the other hand, in the case of the slot antenna, the frequency bandwidth was wide and the cross-polarization level was low.

As a result, an antenna that can reduce the size of the antenna, can easily implement a pattern design, and at the same time increase the gain and radiation efficiency of the antenna, is applied to current electronic products, thereby demanding the production of electronic products suitable for ultra-small size.

Accordingly, in order to solve the above problem, a micro-antenna in which a stripline and a slot-type feeder are combined of Korean Patent Registration No. 10-1056860 has been proposed.

However, the miniature antenna can increase the gain and radiation efficiency to some extent, but when it is applied to electronic devices or lighting equipment, it is directly attached to the main board, that is, attached in close contact with the surface of the main board. It is subject to frequency interference from electronic components, and in particular, the interface part, which is a connector that can input and output control signals, is not effectively protected by external shocks, and it prevents short circuits that may occur due to static electricity in advance. There is a problem that cannot be done.

In addition, when the micro antenna is applied to a wireless device, etc., there is a security problem in that when a malicious program is corrupted due to an external factor such as a hacker, the original program cannot be restored.

Therefore, due to the above problems, the conventionally implemented ultra-small antenna has a problem in that it is not possible to maximize satisfaction due to the limitation of efficiency in use as a whole in applying it to a wireless device or a lighting device.

Korean Patent Laid-Open Publication No. 10-2001-0013132 (published date: February 26, 2001) Republic of Korea Patent Registration No. 10-1097046 (Registration Date: 2011.12.15.) Republic of Korea Patent Registration No. 10-1056860 (Registration Date: 2011.08.08.) Korean Patent Registration No. 10-1151986 (Registration Date: 2012.05.24.)

The present invention makes it suitable for increasing gain and radiation efficiency even if a curved micro-antenna is provided on a separate printed circuit board installed on the main board when applied to an LED lighting fixture, and the printed circuit board The purpose of this is to provide a wireless device for an object detection sensor equipped with a miniature antenna that can stably support and mount a fixed body to minimize frequency interference that may occur in electronic components of the main board. .

Another object of the present invention is to provide a wireless device for an object detection sensor equipped with a miniature antenna that is provided on a printed circuit board with a separate resistor to prevent a short circuit that may be caused by static electricity in advance.

In addition, another object of the present invention is to provide a separate security and safety unit on the printed circuit board so that, when malicious program corruption is caused by a hacker's external factor, it rejects the execution of the corrupted program and automatically restores the program to the factory default state. To provide a wireless device for an object detection sensor equipped with an ultra-small antenna.

In addition, another object of the present invention is to apply a printed circuit board on which a curved micro-antenna pattern is formed to a wireless device for detecting an object, and to install and use the wireless device in a lighting device to maximize the overall satisfaction of use. To provide a wireless device for an object detection sensor equipped with an ultra-small antenna.

In order to solve the above problems, the present invention is a wireless device for an object detection sensor equipped with a miniature antenna, and a printed circuit board having a miniature antenna pattern of a curved shape suitable for increasing gain and radiation efficiency, and the printed circuit board It is fastened so as to stably support the device and is provided with a fixed body having a certain size to minimize frequency interference that may occur at a certain distance, wherein the fixed body is made of a synthetic resin material, and includes an upper groove and an upper groove to minimize frequency interference A lower groove is provided, respectively, and a support end is provided on three sides of the inner upper outer portion of the upper groove so that the printed circuit board can be stably supported, seated, and fastened.

Accordingly, the front end of the fixed body is provided with protruding ends on both sides to protect the interface end provided for power supply and input/output of control signals.

In addition, the printed circuit board is provided with a resistor to prevent a short circuit that may be caused by static electricity in advance.

According to an embodiment of the present invention, the printed circuit board is further provided with a security and safety unit that, when malicious program corruption is caused by a hacker's external factor, rejects the execution of the corrupted program and automatically restores the program to the factory default state. is done

According to an embodiment of the present invention, the printed circuit board may use a communication network selected from any one of 5G, PLC communication, LTE, RS-485, Wi-Fi, and Bluetooth, and interlock using the communication network between the wireless device and the management server. A communication unit is further provided to do so.

By means of the above solution, the present invention has a suitable effect for increasing gain and radiation efficiency even if a curved micro-antenna is provided on a separate printed circuit board installed on the main board when applied to an LED lighting fixture. , a fixed body capable of stably supporting and mounting the printed circuit board is provided, so that frequency interference that may occur in electronic components of the main board is minimized.

According to an embodiment of the present invention, a separate resistor unit is provided on the printed circuit board to prevent a short circuit caused by static electricity in advance.

According to an embodiment of the present invention, a separate security and safety unit is provided on the printed circuit board so that when a malicious program is corrupted due to an external factor by a hacker, the program refuses to execute the corrupted program and automatically restores the program to the factory default state. has the effect of being

According to an embodiment of the present invention, a printed circuit board on which a curved micro-antenna pattern is formed is applied to a wireless device for detecting an object, and the overall satisfaction in use is maximized when the wireless device is installed and used in a lighting device. It works.

1 is an exemplary configuration diagram illustrating a conventional built-in antenna.
Figure 2 is an embodiment configuration picture for showing the upper part of the wireless device for an object detection sensor equipped with a miniature antenna implemented by the present invention.
Figure 3 is an embodiment configuration picture for showing the lower end for the object detection sensor wireless device equipped with a miniature antenna implemented according to the present invention.
Figure 4 is an embodiment configuration photo for showing the upper end of the fixed body in the state before the printed Hiro substrate is fastened in the wireless device for an object detection sensor equipped with a miniature antenna according to the present invention.
5 is a configuration photo of a printed circuit board for showing a circuit pattern applied to a wireless device for an object detection sensor equipped with a miniature antenna according to the present invention.
6 is an embodiment configuration photograph showing a state in which a wireless device for an object detection sensor equipped with a micro-antenna implemented according to the present invention is fastened to a main plate of an LED lighting fixture applied to a lighting system.
7 is an exemplary view for illustrating a situation in which the wireless device for an object detection sensor equipped with an ultra-small antenna implemented according to the present invention is placed inside an electromagnetic wave shielding room (chamber) to test whether it is suitable for performance.
8 is a photograph showing a state arranged inside an electromagnetic wave shielding room (chamber) to test whether the performance of an LED lighting fixture to which a wireless device for an object detection sensor equipped with a miniature antenna is applied according to the present invention is tested; to be.

Hereinafter, with reference to the drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them.

The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

In the following, the provision or arrangement of an arbitrary component on the “upper (or lower)” or “top (or below)” of the substrate means that any component is provided or disposed in contact with the upper surface (or lower surface) of the substrate. means that

In addition, it is not limited to not include other components between the substrate and any components provided or disposed on (or under) the substrate.

Hereinafter, with reference to the accompanying drawings, a wireless device for an object detection sensor equipped with a miniature antenna of the present invention will be described.

First, the wireless device 100 for an object detection sensor equipped with a miniature antenna according to the present invention is applied to a lighting system so that when an object such as a person is detected, the light is turned on so that it can be used, largely a printed circuit board (10) ) and the fixed body 20 is divided.

Accordingly, the printed circuit board 10 is provided with a miniature antenna pattern 11, which has a curved shape suitable for improving gain and radiation efficiency.

In addition, a separate resistor unit 12 is provided on the printed circuit board 10 , which is to prevent a short circuit that may occur due to static electricity on the printed circuit board 10 in advance.

The fixed body 20 has a certain size and is made of a synthetic resin material rather than a metal material. it has been done

Accordingly, the fixed body 20 is provided with a support end 21, which is formed on three sides of the inner upper outer portion of the upper groove 22 and is seated so as to stably support the printed circuit board 10, it will be concluded

In addition, the fixed body 20 has an upper groove 22 and a lower groove 23 formed with a certain space formed therein, so that various electronic components formed on the printed circuit board 10 can minimize frequency interference. In order to do this, electronic components formed on the main board 200 and electronic parts formed on the printed circuit board 10 are spaced apart by a predetermined distance between the main board 200 and the printed circuit board 10 of the lighting system. This is not only to minimize the frequency interference that may occur between the two main boards, but also to prevent the frequency interference from other main boards.

In particular, if the lower surface of the fixed body 20 is not made of a groove, the surface contact with the main plate 200 is widened, so that the frequency interference generated by the main plate 200 may increase by that much.

In addition, the front end of the fixed body 20 is provided with protruding ends 24 on both sides, which are fastened to the printed circuit board 10 to connect the interface end 13 for power supply and input/output of control signals to the outside. This is to protect it from impact to a minimum.

On the other hand, the printed circuit board 10 may be further provided with a security and safety unit (not shown), which, when malicious program corruption due to external factors such as hackers, refuses to execute the corrupted program and This is done so that it can be automatically restored by the program.

The above programs can be implemented in an operating system (OS) such as embedded Linux and at the same time in a real-time operating system (RT-OS). This is done so that the application can operate interchangeably regardless of the type or manufacturer of hardware.

In addition, the printed circuit board 10 is further provided with a communication unit (not shown), which can use a communication network selected from any one of 5G, PLC communication, LTE, RS-485, Wi-Fi or Bluetooth, and the wireless device Communication between 100 and the management server (not shown) can also be interlocked using the communication network.

The results of testing from a company of ICRC approved by the Director of the National Radio Research Agency for a wireless device for an object detection sensor equipped with an ultra-small antenna according to the present invention will be described below.

That is, the accompanying drawings FIG. 7 is an exemplary view for testing the wireless device implemented by the present invention under test conditions, and through this, it was confirmed whether the technical standards set forth in the Ministry of Science and ICT Notification No. 2020-113 are suitable.

That is, as a result of the test, the specified frequency band (㎓) 10.5 ~ 10.55, radiant power 25mW (including absolute antenna gain), the frequency tolerance should be within the specified frequency band, the occupied frequency bandwidth should be 50MHz or less, unnecessary emission in the spurious area The test results were derived as all suitable, such as should be less than the reference value of Table 1 below, and the secondary radio emission in the reception or transmission standby state should be less than or equal to the reference value of Table 2 below.

frequency reference value reference bandwidth less than 1 GHz -36㏈m 100 kHz 1 GHz or more -30㏈m 1 MHz

frequency reference value reference bandwidth less than 1 GHz -54㏈m 100 kHz 1 GHz or more -47㏈m 1 MHz

In addition, the contents of Table 3 below are the results of whether or not it is suitable for the environmental conditions, it should operate without mechanical obstacles under the following test conditions, and should not show abnormalities such as breakage, ignition, and smoke.

Test Items Test contents Relevant Basis suitability vibration Forward amplitude 3 mm, vibration from 0 to 500 times per minute and vibration from 1 mm in advance amplitude, frequency of 500 to 1,800 vibrations per minute, up, down, left and right, and back and forth for 30 minutes each (with a cycle of 10 minutes, When operating after applying the rated voltage after applying Broadcasting Communication Standards Council
KS X 3123 Not applicable Shock Free fall 3 times or more parallel to the falling surface on a sturdy wooden board with a thickness of 1 cm or more from a height of 5 cm. After repeated testing on each side of the device to be measured, when the rated test is applied and operated, it should operate without abnormalities such as damage, ignition, or smoke. Broadcasting Communication Standards Council
KS X 3123 Not applicable continuity
movement When operated for 8 hours under normal usage conditions Broadcasting Communication Standards Council
KS X 3123 Not applicable temperature When operating with the specified power voltage applied at the temperature of -20 ℃ and +50 ℃ for 1 hour or more, respectively, or left at the temperature of -10 ℃ and +50 ℃ for 1 hour respectively and then specified at that temperature When operated by applying the specified power supply voltage Broadcasting Communication Standards Council
KS X 3123 fitness Humidity When operating with the specified power voltage applied after leaving it for 4 hours in a relative humidity of 95% relative to +35 ℃ and returning to normal temperature and humidity Broadcasting Communication Standards Council
KS X 3123 fitness

In addition, the contents of Table 4 below are electrical conditions, test frequency 10.517 GHz, test mode 10.5 GHz, and the test environment is 95% at room temperature 15°C to 35°C, high temperature 50°C, low temperature -20°C, and humidity 35°C. It is the result of suitability after 1 minute has elapsed after starting.

Test Items Test result The acceptance criteria suitability +10%
(DC 5.5 V) Rated voltage
(DC 5.0 V) -10%
(DC 4.5 V) Frequency tolerance (Hz) room temperature 10 516 760 10 516 677 10 516 542 Ministry of Science and ICT Notice No. 2020-113, Article 12, Paragraph 2
Must be within the designated frequency band (10.5 GHz ~ 10.55 GHz) fitness High temperature 10 514 402 10 514 284 10 514 203 low temperature 10 514 269 10 514 422 10 514 034 Humidity 10 514 463 10 514 369 10 514 205 effective radiated power
(mW) room temperature 0.08 0.06 0.06 25 mW (30 mW or less)
(including antenna absolute gain)
Upper limit: 20%
lower limit: - High temperature 0.05 0.05 0.05 low temperature 0.06 0.07 0.07 Humidity 0.07 0.07 0.07 Occupied frequency band
(MHz) room temperature 19.6 18.0 18.4 50 MHz or less fitness Unnecessary launch 1 (㏈m) room temperature -67.6 -68.1 -67.6 -36 ㏈m or less
(RBW: 100 ㎑
less than 1 GHz) fitness Unnecessary Fire 2 (㏈m) room temperature -49.8 -49.9 -48.5 -30 ㏈m or less
(RBW: 1MHz
1 GHz or more) fitness secondary
Radio emission 1 (㏈m) room temperature -87.8 -87.9 -88.1 -54 ㏈m or less
(RBW: 100 ㎑
less than 1 GHz) fitness secondary
Radio emission 2 (㏈m) room temperature -72.3 -71.6 -72.0 -47 ㏈m or less
(RBW: 1MHZ
1 GHz or more) fitness

In addition, Table 5 below shows the results of confirming the characteristics of the micro-antenna pattern 11 provided in the printed circuit board 10 implemented according to the present invention.

item Contents Types and types of aerials pcb antenna Antenna gain (㏈i) -0.33 Orientation characteristics omnidirectional Polarization Characteristics of Antenna Vertical/horizontal polarization Connection type with transmitter built-in, fixed Gain measurement institution name Information and Communication Industry Promotion Agency

In addition, Figure 8 is a photograph for testing through an electromagnetic wave shielding room (10m chamber) in a state in which the wireless device according to the present invention is applied to an LED lighting fixture, and the environmental conditions of the electromagnetic wave shielding room are temperature 23.9 ~ 24.0 ℃, relative humidity It is 45.8 ~ 46.0% R.H., and the test method is made through the electromagnetic compatibility test method {National Radio Research Agency Announcement No. 2021-10 (KS X 3124, KS X 3125)}.

That is, the test method consists of 1) the equipment and system under test in the state described in the instruction manual.

2) When the equipment under test is used with a specific equipment, the equipment is connected together, and in the case of a part used as a part of a system, it is installed in the system and operated normally.

3) Connect the relevant peripheral equipment to each connection terminal (interface port) and test.

4) If the equipment under test has a grounding terminal, it is grounded, and the equipment under test internally grounded through the power line plug is grounded through the power source and tested.

5) The equipment under test, which is normally placed on a table, is tested on a test bench 0.8m high from the ground plane, and the equipment under test placed on the floor is tested on the floor.

6) In case the operation mode and transmission speed of the equipment under test are different, each test is performed and the highest measured value is selected as the test value.

7) The equipment under test supplies power through an independent circuit network, and other peripheral equipment supplies power through a separate circuit network.

8) Mobile equipment is tested at a distance of 0.4m from the grounded conductor wall and 0.8m from the other grounding plane.

9) In the case of flexible power cables, horizontally overlap in the shape of a figure 8 of (0.3 ~ 0.4) m from the center of the network and the equipment under test and bundle them. In the case of a non-flexible power cable or coil type cord, test it in the actual state and record the fact in the test report.

10) Among the test methods for communication ports, for multi-function communication ports that support (10 / 100 / 1 000) Mbps, etc., each test is tested for each speed and graph is attached, and the highest data value is the highest value in the test report recorded in.

11) The equipment under test is placed so that the maximum radiation occurs in each peripheral equipment and cables under normal use.

12) Rotate the equipment under test by 360 degrees, change the antenna height to (1 ~ 4) m, and find the maximum radiation point for each of the horizontal and vertical polarizations.

13) The measuring distance is 10m.

14) The noise field strength is calculated by Equation 1 below, but when the correction factor is automatically corrected, the measured value is applied as it is.

[Equation 1]

F1 [㏈(㏈/m)] = F2 [㏈(㏈)] + AF [㏈/m] + CL [㏈]

F1: final measurement value, F2: instrument reading, AF: antenna correction factor, CL: cable loss, H is horizontal and V is vertical.

Under the test conditions as described above, the results of the conducted disturbance test at the AC main power port, the asymmetric mode conducted emission test, the radiated emission test at a frequency of 1 GHz or less, and the radiated emission test at a frequency of 1 GHz or more were all suitable.

In addition, an electrostatic discharge resistance test was performed through an electromagnetic wave shielding room.

That is, the test conditions are

Discharge interval: 1 time/1 second

/150 ㎊Discharge Impedance: 330

/150 pF

Discharge Type: Direct Discharge - Air Discharge, Contact Discharge

Indirect discharge-horizontal coupling plane, vertical coupling plane

Polarity: +/-

Number of discharges: Discharge in the air - more than 10 times per applied part

Contact Discharge - More than 10 times per applied part

Indirect Discharge - More than 10 times per applied part

Performance evaluation criteria: B

Discharge voltage: ±4kV

The test method is

(Common conditions)

1) The distance between the equipment under test and the test room or other metal objects should be separated by at least 1m.

2) The discharge return path cable of the generator is about 2m long and connected to the reference ground plane, and the extra length should not be induced to the ground reference plane as much as possible, or it should be isolated from the conductive part by 0.2m or more.

3) Equipment to be carried or used on a desk is installed on a non-conductive test bench 0.8 m high above the reference ground plane. For floor-mounted equipment, an insulating pedestal with a thickness of 0.1 m is installed on the reference ground plane, and the equipment and cables under test are installed on the base. to install

4) For the reproducibility of the test results, the static electricity generator applies the test voltage perpendicular to the surface of the equipment under test.

(air discharge test)

1) The circular discharge power tip should be approached quickly until it comes into contact with the equipment under test to prevent mechanical damage to the equipment under test, and after each discharge is completed, the electrostatic discharge generator (discharge electrode) should be isolated from

(contact discharge test)

1) The chip-type discharge electrode tip should contact the equipment under test before maintaining the switch operation during discharge.

2) If the surface of the equipment to be tested is painted, but the coating contents are not described in the manufacturer's instruction manual, a contact discharge test should be conducted on the coating layer by penetrating the coating with the discharge electrode tip of the static electricity generator.

Through this, it was confirmed that the result of the electrostatic discharge immunity test was suitable.

In addition, the test conditions for the radiated RF electromagnetic field immunity test are,

Antenna Position: Horizontal and Vertical

Antenna distance: 3m

Field strength: 3V/m (unmodulated, rms)

Frequency range: 80㎒ ~ 6㎓

Modulation: AM, 80 %, 1 kHz sine wave

Sweep rate: 15 × 10 ^-3 decades/s

Frequency step: Class 1/2 : 1% step, Class 3: 10% step

Applied area: 6 sides

The test method is

1) In the electromagnetic wave anechoic chamber used for the test, a uniform electromagnetic field was formed within (0 to 6) dB of the specified value for the strength of the electromagnetic field on a virtual vertical plane of 1.5 m x 1.5 m determined at a height of 0.8 m or more from the reference ground plane.

2) The table-top specimen is placed on a 0.8 m high non-conductive pedestal, and the floor-mounted specimen is placed on a 0.1 m high non-conductive pedestal.

3) The residence time at each frequency shall not be less than the time required for the EUT to operate and respond, and shall not be less than 0.5 sec. Sensitive frequencies (eg clock frequencies) should be analyzed separately.

Through this, it was confirmed that the result of the radiated RF electromagnetic field immunity test was suitable.

In addition, the conditions for the EFT/burst immunity test are,

Applied voltage and polarity: Input AC power port ±1.0㎸

Input DC power port ±0.5㎸

Signal line and wired network port (except xSDL) ±0.5 kV

xDSL wired network port ±0.5㎸

Impulse repetition rate: 5 kHz (xDSL wired network port 100 kHz)

Impulse rise time: 5㎱ ± 30%

Impulse period: 50 ㎱ ± 30%

Burst Duration: 15 ms ± 20%

Burst Period: 300 ms ± 20%

Application time: 1 minute or more

Application method: input AC, DC power port (coupling/decoupling network)

Input AC, DC power port, etc. (Capacitive coupling clamp)

The test method is

1) The reference ground plane should be wider than 0.1 m from each boundary of the equipment under test, and it should be at least 1 m x 1 m in size and connected to the protective earth.

2) The equipment under test should be at least 0.5 m away from all other metal structures except for the reference ground plane at the lower end of the equipment under test.

3) Connect the equipment under test to the grounding system according to the instruction manual, and do not connect additional grounding.

4) The coupling plate of the coupling clamp should be at least 0.5 m away from all other metal structures except for the reference ground plane located at the bottom of the coupling clamp.

5) The length of the signal line and power line between the equipment under test and the coupling element shall be 0.5 m or less. However, when the power line is more than 1 m, the excess length of the power line must be placed at a distance of 0.1 m from the reference ground plane and folded without being rolled so that it does not become inductive.

Through this, it was confirmed that the results of the EFT/burst immunity test were suitable.

In addition, the test conditions for the surge immunity test are,

Surge voltage: AC power port (normal) line-line: ±1.0㎸

Line-to-ground: ±2.0 kV

AC power port (communication center) line-line: ±0.5㎸

Line-to-ground: ±1.0 kV

Communication port (independent equipment) Line-ground ±1.0㎸

Communication port (communication center equipment) wire-shielding ±0.5㎸

Input AC, DC power port open circuit voltage waveform: 1.2/50㎲

Short circuit current waveform: 8/20㎲

Number of authorizations: 5 times each

Phase: 0°, 90°, 180°, 270° (input AC power terminal)

Polarity: +/-

Repetition Rate: 1 rep/60 seconds

Signal line and communication port open circuit voltage waveform: 1.2/50㎲

5 times each

Repetition rate 1 time/60 seconds

The test method is

1) Unless otherwise specified, the surge is applied to be synchronized with the voltage phase at the zero crossing and the maximum value of the AC voltage waveform (positive and negative).

2) Surge should be applied between line and line and between line and ground. In case of a wire-to-ground test, unless there are special conditions, the test voltage shall be continuously applied between each wire and ground.

3) The test procedure should be performed while increasing the voltage step by step in consideration of the nonlinear current-voltage characteristics of the EUT.

Through this, it was confirmed that the surge resistance test result was suitable.

In addition, the conductive RF electromagnetic field immunity test conditions are,

Frequency range: 150 ㎑ ~ 80 ㎒

Field strength: 3V

Modulation: AM, 80 %, 1 kHz sine wave

Sweep rate: 15 × 10 ^-3 decades/s

Frequency step: 1 % step

The test method is

1) After installing the EUT, sweep the test frequency band by setting the frequency range and test level specified in the immunity standard.

2) The residence time at each frequency shall not be less than the time required for the EUT to operate and respond, and shall not be less than 0.5 sec. Sensitive frequencies (eg clock frequencies) should be analyzed separately. The residence time depends on the product.

3) The test should be performed with a test generator connected to each coupling and decoupling device, and the unfiltered RF input modes of the coupling devices are terminated with a 50 Ω load resistor.

4) The EUT is placed on an insulated support at a height of 0.1 m above the reference ground plane. All cables present in the EUT shall be supported at a height of at least 30 mm above the reference ground plane.

5) Install it at a distance of 0.1 m ~ 0.3 m from the EUT on the reference ground plane and the coupling and decoupling device.

Through this, it was confirmed that the conducted RF electromagnetic field immunity test result was suitable.

In addition, the voltage drop and instantaneous blackout immunity test conditions are,

Voltage overshoot/undershoot: within 5% of voltage change

Voltage rise and fall time: 1㎲ ~ 5㎲

Frequency deviation of test voltage: within ± 2%

Equipment under test applied voltage AC 220V/60Hz

Number of tests: 3 times

Test Interval: 10 seconds

The test method is

1) The test shall be performed by connecting the test generator to the EUT with the shortest power supply line specified by the EUT manufacturer.

2) The frequency of the test voltage should be within ±2% of the rated frequency.

3) During the test, the mains voltage for the test is monitored within an accuracy of 2%, and the zero cross-adjustment of the generator should have an accuracy of ±10˚.

4) A sudden change in the power supply voltage must occur at the 0˚ point of the voltage waveform.

Through this, it was confirmed that the voltage drop and instantaneous blackout immunity tests were suitable.

As mentioned above, although specific embodiments of the present invention have been described, it is apparent that various implementation modifications are possible within the limits that do not depart from the scope of the present invention.

Therefore, the scope of the present invention should not be conveyed limited to the described embodiments, and should be defined by the following claims as well as the claims and equivalents.

That is, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims and their equivalents All changes or modifications derived from the concept should be construed as being included in the scope of the present invention.

10: printed circuit board
11: Smallest antenna pattern
12: resistance part
13: interface stage
20: fixed body
21 : support group
22: upper groove
23: lower groove
24: protruding end
100: wireless device
200: main board

Claims (3)

A printed circuit board provided with a curved micro-antenna pattern, and a fixed body fastened to stably support the printed circuit board and having a certain size,
The fixed body is made of a synthetic resin material, and has an upper groove and a lower groove, respectively, and a support end is provided on three sides of the inner upper outer part of the upper groove so that the printed circuit board can be stably supported, seated, and fastened. ,
Projecting ends are provided on both sides of the front end of the fixed body to protect the interface end provided for power supply and input/output of control signals,
A resistor is provided on the printed circuit board to prevent a short circuit that may be caused by static electricity in advance,
The printed circuit board has a micro-antenna, characterized in that, when a malicious program is corrupted due to an external factor by a hacker, a security and safety unit is further provided to reject the execution of the corrupted program and automatically restore the program to the factory default state. Equipped wireless device for object detection sensor. delete delete

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