CN100351635C - Electromagnetic wave detecting system - Google Patents
Electromagnetic wave detecting system Download PDFInfo
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- CN100351635C CN100351635C CNB2004100538909A CN200410053890A CN100351635C CN 100351635 C CN100351635 C CN 100351635C CN B2004100538909 A CNB2004100538909 A CN B2004100538909A CN 200410053890 A CN200410053890 A CN 200410053890A CN 100351635 C CN100351635 C CN 100351635C
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Abstract
The present invention relates to an electromagnetic wave detecting system which comprises a testing platform, a first horizontal antenna, a first vertical antenna and a signal processing unit, wherein the testing platform is used for holding objects which need detecting, the first horizontal antenna is positioned at one part of an anechoic chamber, and the first vertical antenna is positioned at the other part of the anechoic chamber. The first horizontal antenna and the first vertical antenna are used for respectively receiving electromagnetic waves, and generate a horizontal electric wave and a vertical electric wave. The signal processing unit is coupled to the first horizontal antenna and the first vertical antenna, and is used for converting and analyzing the horizontal electric wave and the vertical electric wave.
Description
Technical field
The present invention relates to a kind of Electromagnetic Wave Detection system, particularly a kind of Electromagnetic Wave Detection system that is configured in the anechoic chamber.
Background technology
In the modern society, electronic product is almost omnipresent, and each electronic product all can more or less generate electromagnetic waves in use, and excessive electromagnetic intensity will produce injury to human body.Electronic product all must be earlier through the electromagnetic wave verification test before listing or outlet, and the product that is up to the standards just can be got permission listing or outlet.
The electromagnetic mode of check is that electronic product is placed in the anechoic chamber, to test at present.See also Figure 1A, Figure 1B, Fig. 1 C and Fig. 1 D, they are respectively the 3rd synoptic diagram of second synoptic diagram of first synoptic diagram of traditional electric wave detection system, traditional electric wave detection system, traditional electric wave detection system and the 4th synoptic diagram of traditional electric wave detection system.Shown in Figure 1A, when determinand 102 is placed on test board 101 when testing, antenna 103 is adjusted earlier and is become horizontal direction and be positioned at the first height h1 to receive electromagnetic wave and antenna 103.Shown in Figure 1B, then converting antenna 103 is adjusted to vertical direction reception determinand 102 electromagnetic waves and is positioned at the first height h1 equally.Shown in Fig. 1 C, then adjust the electromagnetic wave that antenna 103 to second height h2 measure determinand 102 again, and antenna 103 in horizontal direction.Shown in Fig. 1 D, at the second height h2, adjust antenna again and test again once at last to vertical direction, just can finish whole tests.Therefore, the electromagnetic mode of tradition check need be respectively the time that antenna is adjusted into horizontal direction through the time of four sections adjustment, is adjusted into the time of vertical direction, adjusts the time of antenna height, and adjusts the time of adjusting antenna direction behind the height again.Therefore, when using traditional electric wave detection system to carry out the electromagnetic wave verification test, suitable loaded down with trivial details of process, and suitable taking time and effort.
Summary of the invention
Purpose of the present invention just provides a kind of Electromagnetic Wave Detection system, reduces and measures the electromagnetic time of determinand, to reach the purpose of finishing Electromagnetic Wave Detection fast.The present invention utilizes simultaneously at anechoic chamber, configuration level antenna and vertical antenna, reduce the time that horizontal antenna becomes vertical antenna of adjusting, and can cooperate horizontal antenna and the vertical antenna that installs differing heights additional, horizontal antenna or vertical antenna are moved to the time of differing heights with minimizing.
According to purpose of the present invention, a kind of Electromagnetic Wave Detection system is proposed, this system comprises: test board, first horizontal antenna, first vertical antenna and signal processing unit, test board is used for placing determinand.First horizontal antenna and first vertical antenna lay respectively at two of anechoic chamber, and sentence the electromagnetic wave that receives determinand, and produce a horizontal electric wave and a vertical electric wave respectively in view of the above.Signal processing unit receives and analysis level electric wave and vertical electric wave.
According to purpose of the present invention, reintroduce a kind of Electromagnetic Wave Detection system, this system comprises: test board, first antenna sets and signal processing unit.Test board is used for placing determinand.First antenna sets is arranged on a place of Electromagnetic Wave Detection system, and first antenna sets comprises horizontal antenna and vertical antenna, and horizontal antenna and vertical antenna are positioned at sustained height, and produces horizontal electric wave and vertical electric wave respectively.Signal processing unit receives and analysis level electric wave and vertical electric wave.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, hereinafter can lift several preferred embodiments, and cooperate appended graphicly, be described in detail below.
Description of drawings
Figure 1A is first synoptic diagram of traditional electric wave detection system;
Figure 1B is second synoptic diagram of traditional electric wave detection system;
Fig. 1 C is the 3rd synoptic diagram of traditional electric wave detection system;
Fig. 1 D is the 4th synoptic diagram of traditional electric wave detection system;
Fig. 2 A is the synoptic diagram of the Electromagnetic Wave Detection system of first embodiment;
Fig. 2 B is that the Electromagnetic Wave Detection system antenna of first embodiment is provided with synoptic diagram;
Fig. 2 C is the block diagram of signal processing unit;
Fig. 2 D is the block diagram of signal conversion unit;
Fig. 3 is the synoptic diagram of the electric wave detection system of second embodiment;
Fig. 4 is the synoptic diagram of the electric wave detection system of the 3rd embodiment;
Fig. 5 A is the synoptic diagram of the electric wave detection system of the 4th embodiment;
Fig. 5 B is the synoptic diagram with Electromagnetic Wave Detection system of first antenna sets and second antenna sets.
Embodiment
First embodiment
Please refer to Fig. 2 A, it is the synoptic diagram of the Electromagnetic Wave Detection system of first embodiment.Electromagnetic Wave Detection system 290 comprises test board 201, first horizontal antenna 202, first vertical antenna 203 and signal processing unit 204.Please refer to Fig. 2 B, it is that the Electromagnetic Wave Detection system antenna of first embodiment is provided with synoptic diagram.Test board 201 is used for placing the place that determinand 210, the first horizontal antennas 202 are configured in anechoic chamber, 200, and first horizontal antenna 202 is D1 with the distance of determinand 210.First vertical antenna 203 is configured in an other place of anechoic chamber, 200, and first vertical antenna 203 is D2 with the distance of determinand 210, and D1 is identical in fact with the size of D2, all is three meters for example.Shown in Fig. 2 A, first horizontal antenna 202 and first vertical antenna 203 are couple to signal processing unit 204 respectively.When determinand 210 is in mode of operation following time, determinand 210 can send electromagnetic wave.The electromagnetic wave of first horizontal antenna 202 and first vertical antenna, 203 reception determinands 210 also produces horizontal electric wave s1 and the vertical electric wave s2 shown in Fig. 2 A respectively in view of the above, and horizontal electric wave s1 and vertical electric wave s2 for example are horizontal electric wave and vertical electric wave.Signal processing unit 204 is couple to first horizontal antenna 202 and first vertical antenna 203.Signal processing unit 204 is used for changing and analysis level electric wave s1 and vertical electric wave s2.
Please refer to Fig. 2 C, Fig. 2 C is the block diagram of signal processing unit, and signal processing unit 204 comprises: control module 220, signal conversion unit 240 and data processing unit 230.Please refer to Fig. 2 D, Fig. 2 D is the block diagram of signal conversion unit.Signal conversion unit 240 has amplifier 241 and converter 242.Converter 242 for example is a spectrum analyzer.Amplifier 241 connects first horizontal antenna 202 and first vertical antenna 203 respectively, and converter 242 connects amplifier 241 and is used for converting horizontal electric wave s1 and vertical electric wave s2 to horizontal signal H1 and vertical signal V1 respectively.Data processing unit 230 for example is a computing machine, and analyzing and processing horizontal signal H1 and vertical signal V1 also are connected on the control module 220.Control module 220 is used for adjusting the height of first horizontal antenna 202 and first vertical antenna 203, and control test board 201 rotates, after test board 201 rotations one angle, first horizontal antenna 202 and first vertical antenna 203 receive the electromagnetic wave of this angle, electromagnetic wave via the amplifier in the signal processing unit 204 241, converter 242 and data processing unit 230 Treatment Analysis after, adjust test boards 201 by control module 220 and rotate to next angle to carry out electromagnetic test.Control module 220 controllable testing platforms 201 are done the rotation of 360 degree, make determinand 210 can do the electromagnetic wave test of different angles.
Please refer to Fig. 2 B, generally speaking, anechoic chamber, 200 can be three kinds of sizes, is respectively 7*3*3 rice, 7*4*3 rice and 9*6*6 rice.When the Electromagnetic Wave Detection system configuration of present embodiment is in the anechoic chamber, of 7*3*3 rice and 7*4*3 rice, height when first horizontal antenna 202 and first vertical antenna 203 begin to test is one meter of h1, after testing this height, control module 220 is adjusted two meters of the height h2 of first horizontal antennas 202 and first vertical antenna 203 to test.If yet when anechoic chamber, 200 was the size of 9*6*6 rice, the height of adjusting first horizontal antennas 202 and first vertical antenna 203 as the control module 220 of Fig. 2 C was adjusted to h2 by one meter of h1 and is tested for three meters.Shown in Fig. 2 B, utilize 200 liang of anechoic chamber,s and locate simultaneously configuration level antenna and vertical antenna and be positioned at equally highly to save the time that horizontal antenna is adjusted to vertical antenna.
Second embodiment
Please refer to Fig. 3, it is the synoptic diagram of the Electromagnetic Wave Detection system of second embodiment of the invention.Anechoic chamber, 200 comprises: test board 201, first horizontal antenna 202, second horizontal antenna 302, first vertical antenna 203, second vertical antenna 303.When if anechoic chamber, 200 is the size of 7*3*3 rice or 7*4*3 rice, first horizontal antenna 202 and first vertical antenna 203 navigate to the first height h1 by adjusting as the control module 220 of Fig. 2 C, it for example is one meter height, second horizontal antenna 302 and second vertical antenna 303 are adjusted by control module 220 and are navigated to the second height h2, for example are two meters height.When if anechoic chamber, 200 is the size of 9*6*6 rice, first horizontal antenna 202 and first vertical antenna 203 are adjusted by control module 220 and are navigated to the first height h1 ', it for example is one meter height, second horizontal antenna 302 and second vertical antenna 303 are adjusted by control module 220 and are navigated to the second height h2 ', for example are three meters height.Second horizontal antenna 302 is parallel to 202 configurations of first horizontal antenna, second vertical antenna 303 is parallel to 203 configurations of first vertical antenna.As first embodiment, first horizontal antenna 202 and second horizontal antenna 302 receive the electromagnetic wave of determinand 210 and produce horizontal electric wave s1.First vertical antenna 203 and second vertical antenna 303 receive determinand 210 electromagnetic waves and produce vertical electric wave s2, and the height of first horizontal antenna 202 and first vertical antenna 203 is identical, and the height of second horizontal antenna 302 and second vertical antenna 303 is identical.
The 3rd embodiment
Please refer to Fig. 4, it is the synoptic diagram according to the Electromagnetic Wave Detection system of third embodiment of the invention.Anechoic chamber, 200 comprises: test board 201, first horizontal antenna 202, second horizontal antenna 402, first vertical antenna 203, second vertical antenna 403.When if anechoic chamber, 200 is the size of 7*3*3 rice or 7*4*3 rice, first horizontal antenna 202 and first vertical antenna 203 navigate to the first height h1 by adjusting as the control module 220 of Fig. 2 C, it for example is one meter, second horizontal antenna 402 and second vertical antenna 403 are adjusted by control module 220 and are navigated to the second height h2, for example are two meters.When if anechoic chamber, 200 is the size of 9*6*6 rice, first horizontal antenna 202 and first vertical antenna 203 are adjusted by control module 220 and are navigated to the first height h1 ', it for example is one meter, second horizontal antenna 402 and second vertical antenna 403 are adjusted by control module 220 and are navigated to the second height h2 ', for example are three meters.Described as first embodiment, signal processing unit 204 is used for changing and analyze first horizontal antenna 202 and second horizontal antenna 402 and first vertical antenna 203 and received horizontal electric wave s1 and the vertical electric wave s2 of second vertical antenna 403.As Fig. 3 or shown in Figure 4, dispose two horizontal antennas and two vertical antennas simultaneously in anechoic chamber, and when being positioned at differing heights, except saving the time that tradition need be adjusted to vertical antenna from horizontal antenna, more can save need adjustment horizontal antenna or vertical antenna time in the differing heights measurement.
The 4th embodiment
Please refer to Fig. 5 A, it is the synoptic diagram of the Electromagnetic Wave Detection system of fourth embodiment of the invention.Anechoic chamber, 200 comprises: the test board 201 and first antenna sets 550.Test board 201 is used for placing determinand 210.First antenna sets 550 is arranged on a place of Electromagnetic Wave Detection system, and first antenna sets 550 comprises horizontal antenna 551 and vertical antenna 552, is used for receiving respectively electromagnetic wave, and produces in view of the above as horizontal electric wave s1 and vertical electric wave s2 among first embodiment.Horizontal antenna 551 and vertical antenna 552 are positioned at the first height h1 equally, for example are Yi Michu, are used for receiving simultaneously the electromagnetic wave of determinand 210.Please refer to Fig. 5 B, it is the synoptic diagram that has the Electromagnetic Wave Detection system of first antenna sets and second antenna sets according to the present invention.In the 4th embodiment, anechoic chamber, 200 can comprise that also second antenna sets, 580 configured in parallel are in first antenna sets 550.Shown in Fig. 5 A, at a place of anechoic chamber, horizontal antenna and vertical antenna are set, horizontal antenna and vertical antenna are positioned at equal height simultaneously, can save tradition and need to adjust the time that horizontal antenna becomes vertical antenna.Shown in Fig. 5 B, at a place of anechoic chamber, and differing heights is provided with horizontal antenna simultaneously and vertical antenna can also be saved the time of adjusting antenna height.Electromagnetic Wave Detection system space shown in Fig. 2 B and Fig. 5 A is provided with approximately can save half time of traditional measurement mode, and the Electromagnetic Wave Detection system space set-up mode shown in Fig. 3, Fig. 4 and Fig. 5 B only is the time of traditional measurement mode 1/4th.
The Electromagnetic Wave Detection system that the above embodiment of the present invention disclosed, saved the time of the required cost of Electromagnetic Wave Detection system in the at present general anechoic chamber,, need when testing earlier horizontal antenna to be adjusted to vertical antenna in the past, and take time horizontal antenna is moved to differing heights, again horizontal antenna is adjusted to vertical antenna at last.And utilization of the present invention is arranged on horizontal antenna or vertical antenna simultaneously and tests in the anechoic chamber,, also can cooperate utilization to use four groups of antennas to test to reduce the needed electromagnetic time of measurement determinand to reduce cost simultaneously.
Above-mentioned preferred embodiment; be not be used for limiting of the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; can do various change and alternative, so protection scope of the present invention should be as the criterion with defining of claims.
The reference numeral explanation
101,201: testboard
102,210: determinand
103: antenna
200: anechoic chamber,
202: the first horizontal antennas
203: the first vertical antennas
S1: horizontal electric wave
S2: vertical electric wave
204: signal processing unit
220: control module
230: data processing unit
241: amplifier
242: converter
290: the Electromagnetic Wave Detection system
302,402: the second horizontal antennas
303,403: the second vertical antennas
H1, h1 ': first height
H2, h2 ': second height
H1: horizontal signal
V1: vertical signal
550: the first antenna sets
551: horizontal antenna
552: vertical antenna
580: the second antenna sets
Claims (21)
1. an Electromagnetic Wave Detection system is configured in the anechoic chamber,, and described Electromagnetic Wave Detection system is used for testing an electromagnetic wave of determinand, and described Electromagnetic Wave Detection system is characterized in that, comprising:
Test board is used for placing described determinand;
First horizontal antenna is positioned at a place of described anechoic chamber;
First vertical antenna is positioned at another place of described anechoic chamber,, and described first horizontal antenna and described first vertical antenna are used for receiving described electromagnetic wave respectively, and produce a horizontal electric wave and a vertical electric wave respectively according to this; Described first horizontal antenna is positioned at identical height with described first vertical antenna; And the distance between described first horizontal antenna and described determinand is identical with distance between described first vertical antenna and the described determinand; And
Signal processing unit is couple to described first horizontal antenna and described first vertical antenna, and described signal processing unit is used for changing and analyzing described horizontal electric wave and described vertical electric wave.
2. Electromagnetic Wave Detection as claimed in claim 1 system is characterized in that described signal processing unit comprises:
One control module is configured in described Electromagnetic Wave Detection system, and described control module is used for adjusting the height of described first horizontal antenna and described first vertical antenna;
One signal conversion unit comprises:
One amplifier is connected to described first horizontal antenna and described first vertical antenna, and described amplifier is used for amplifying described horizontal electric wave and described vertical electric wave; And
One converter is connected described amplifier, is used for described horizontal electric wave and described vertical electric wave are converted to a horizontal signal and a vertical signal; And
One data processing unit is connected described converter, and described data processing unit is used for receiving and analyzing described horizontal signal and described vertical signal.
3. Electromagnetic Wave Detection as claimed in claim 2 system is characterized in that described control module is used for adjusting the anglec of rotation of described test board.
4. Electromagnetic Wave Detection as claimed in claim 3 system is characterized in that described test board is a universal stage, and described universal stage can be done 360 ° of rotations.
5. Electromagnetic Wave Detection as claimed in claim 2 system is characterized in that described converter is a spectrum analyzer.
6. Electromagnetic Wave Detection as claimed in claim 2 system is characterized in that wherein said data processing unit is a computing machine.
7. Electromagnetic Wave Detection as claimed in claim 1 system, it is characterized in that, described Electromagnetic Wave Detection system also comprises second horizontal antenna and second vertical antenna, described first horizontal antenna and described first vertical antenna are positioned at the first height h1, and described second horizontal antenna and described second vertical antenna are positioned at the second height h2, described second horizontal antenna and described first horizontal antenna are positioned at a place and parallel to each other, and described second vertical antenna and described first vertical antenna are positioned at another place and parallel to each other.
8. Electromagnetic Wave Detection as claimed in claim 1 system, it is characterized in that, described Electromagnetic Wave Detection system further comprises second horizontal antenna and second vertical antenna, described first horizontal antenna and described first vertical antenna are positioned at the first height h1, and described second horizontal antenna and described second vertical antenna are positioned at the second height h2, described second horizontal antenna and described first vertical antenna are positioned at a place, described second vertical antenna and described first horizontal antenna are positioned at another place, described second horizontal antenna is parallel with first horizontal antenna, and described second vertical antenna is parallel with first vertical antenna.
9. Electromagnetic Wave Detection as claimed in claim 1 system is characterized in that described anechoic chamber, is the space of 7*3*3 rice.
10. Electromagnetic Wave Detection as claimed in claim 1 system is characterized in that described anechoic chamber, is the space of 7*4*3 rice.
11. Electromagnetic Wave Detection as claimed in claim 1 system is characterized in that described anechoic chamber, is the space of 9*6*6 rice.
12. an Electromagnetic Wave Detection system is configured in the anechoic chamber,, described Electromagnetic Wave Detection system is used for testing the electromagnetic wave of determinand, it is characterized in that, described Electromagnetic Wave Detection system comprises:
One test board is used for placing described determinand;
One first antenna sets, be arranged on a place of described Electromagnetic Wave Detection system, described first antenna sets comprises a horizontal antenna and a vertical antenna, described horizontal antenna and described vertical antenna are positioned at sustained height, and described horizontal antenna and described vertical antenna are used for receiving respectively described electromagnetic wave and distinguish horizontal electric wave of generation and vertical electric wave in view of the above; And
One signal processing unit is couple to described horizontal antenna and described vertical antenna, and described signal processing unit is used for changing and analyzing described horizontal electric wave and described vertical electric wave;
Distance between described horizontal antenna and the described determinand is identical with distance between described vertical antenna and the described determinand.
13. Electromagnetic Wave Detection as claimed in claim 12 system is characterized in that described signal processing unit comprises:
One control module is configured in described Electromagnetic Wave Detection system, and described control module is used for adjusting the height of described horizontal antenna and described vertical antenna;
One signal conversion unit comprises:
One amplifier connects described antenna sets, and described amplifier is used for horizontal electric wave of amplification and described vertical electric wave; And
One converter connects described amplifier, be used for described horizontal electric wave and described vertical electric wave be converted to a horizontal signal and and a vertical signal; And
One data processing unit connects described converter, and described data processing unit is used for receiving and analyzing described horizontal signal and described vertical signal.
14. Electromagnetic Wave Detection as claimed in claim 13 system is characterized in that described control module is used for adjusting the anglec of rotation of described test board.
15. Electromagnetic Wave Detection as claimed in claim 14 system is characterized in that described test board is a universal stage, described universal stage can be done 360 ° of rotations.
16. Electromagnetic Wave Detection as claimed in claim 13 system is characterized in that described converter is a spectrum analyzer.
17. Electromagnetic Wave Detection as claimed in claim 13 system is characterized in that described data processing unit is a computing machine.
18. Electromagnetic Wave Detection as claimed in claim 12 system, it is characterized in that, described Electromagnetic Wave Detection system further comprises second antenna sets, described second antenna sets comprises second horizontal antenna and second vertical antenna, described second horizontal antenna and described second vertical antenna are positioned at sustained height, described second horizontal antenna and described second vertical antenna are used for receiving respectively described electromagnetic wave and produce the second horizontal electric wave and second vertical electric wave respectively in view of the above, and, described second antenna sets and described first antenna sets are positioned at differing heights, described second horizontal antenna is parallel to described first horizontal antenna, and described second vertical antenna is parallel to described first vertical antenna.
19. Electromagnetic Wave Detection as claimed in claim 12 system is characterized in that described anechoic chamber, is the space of 7*3*3 rice.
20. Electromagnetic Wave Detection as claimed in claim 12 system is characterized in that described anechoic chamber, is the space of 7*4*3 rice.
21. Electromagnetic Wave Detection as claimed in claim 12 system is characterized in that described anechoic chamber, is the space of 9*6*6 rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100538909A CN100351635C (en) | 2004-08-20 | 2004-08-20 | Electromagnetic wave detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100538909A CN100351635C (en) | 2004-08-20 | 2004-08-20 | Electromagnetic wave detecting system |
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| CN1737585A CN1737585A (en) | 2006-02-22 |
| CN100351635C true CN100351635C (en) | 2007-11-28 |
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| CNB2004100538909A Expired - Fee Related CN100351635C (en) | 2004-08-20 | 2004-08-20 | Electromagnetic wave detecting system |
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| CN (1) | CN100351635C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107797086A (en) * | 2017-10-25 | 2018-03-13 | 云南电网有限责任公司电力科学研究院 | A kind of power equipment verification system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101038352B1 (en) * | 2007-07-30 | 2011-06-01 | 가부시키가이샤 무라타 세이사쿠쇼 | Electromagnetic wave measuring device |
| JP5217926B2 (en) * | 2008-11-11 | 2013-06-19 | ソニー株式会社 | Electromagnetic wave measuring device |
| CN102136873B (en) * | 2010-01-25 | 2015-06-03 | 中兴通讯股份有限公司 | Antenna testing system and antenna testing method |
| CN102455387A (en) * | 2010-10-20 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Electromagnetic radiation detecting device |
| CN104777381B (en) * | 2015-04-15 | 2018-03-27 | 深圳市巴伦检测技术有限公司 | A kind of Electromagnetic Interference Test method and system of double antenna |
| CN108132360B (en) * | 2016-12-01 | 2024-07-19 | 深圳市新益技术有限公司 | Rotary bearing table and antenna measurement isolation chamber |
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| US4631473A (en) * | 1981-09-07 | 1986-12-23 | Nippon Univac Kaisha, Ltd. | Transient electromagnetic field detector |
| DE19812923A1 (en) * | 1998-03-24 | 1999-09-30 | Siemens Ag | Transmission and reception behaviour determination method for hand-held radio apparatus |
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| CN107797086A (en) * | 2017-10-25 | 2018-03-13 | 云南电网有限责任公司电力科学研究院 | A kind of power equipment verification system and method |
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| CN1737585A (en) | 2006-02-22 |
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