!!Ķ²»ÇÈ¡Ê£´£°KH£ú¡Ë
!²»Â®
https://ja.wikipedia.org/wiki/%E9%9F%B3%E9%80%9F

!¶á»÷¼°
 S=20.055 * SQRT(T+273.15)
 T = ÀÝ»á
 SQRT()Æâ¤ÏÀäÂв¹ÅÙ

!¶á»÷ÃÍ
 331.5+3*T/5
 T = ÀÝ»á
! ³µ»»(40Khz,25uS)
,µ¤²¹,²»Â®,¦Ë(40Khz)mm,1m¤ÎÅþã»þ´Ö(mS)
,15,340.6522187	m/s,8.51,2.9355mS
,25,346.5128278	m/s,8.66,2.8859mS
,30,349.1816 m/s,8.72,2.8638
,35,352.0495 m/s,8.8012,2.8405
 40Ksps:::2.93 / 0.025 = 117.20(samples)
 200Ksps::2.93 / 0.005 = 587.10

!ADC
[£Í£Ã£Ð£³£°£°£²¡Ý£É¡¿£Ð|http://akizukidenshi.com/catalog/g/gI-02584/]
3.2V 75Ksps / 5v 200Ksps

!Tips
https://www.jsmoc.org/kiso/pulse2.html

https://kit.socinno.com/1_3_b/

https://www.murata.com/ja-jp/products/sensor/ultrasonic/library/basic/circuit

https://www.tamura-ss.co.jp/jp/products/electronic_components/category/piezoelectric_ceramic/se-40a1.html

https://toragi.cqpub.co.jp/Portals/0/backnumber/2004/10/p265-266.pdf

!¼°
http://www.ne.jp/asahi/tokyo/nkgw/www_2/gakusyu/hadou/Wave_simulation/Wave_Simulation_kaisetu/Wave_Simulation_kaisetu_1.html

https://keisan.casio.jp/exec/user/1341380413

!ÇÈÆ°ÊýÄø¼°
https://ja.wikipedia.org/wiki/%E6%B3%A2%E5%8B%95%E6%96%B9%E7%A8%8B%E5%BC%8F

!²óÏ©
http://www.piclist.com/images/www/hobby_elec/srm1.htm

http://www.piclist.com/images/www/hobby_elec/srm1_5.htm

!¥·¥ß¥å¥ì¡¼¥·¥ç¥ó(FDTD ²»¶Á)

https://gist.github.com/peace098beat/6cb8d051919d19511d7c

https://github.com/nagataniyoshiki/FDTD_language_comparison

http://samuiui.com/2019/06/03/fdtd%E6%B3%95%E3%81%AB%E3%82%88%E3%82%8B%E9%9F%B3%E9%9F%BF%E3%82%B7%E3%83%9F%E3%83%A5%E3%83%AC%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3/

! 
http://www.nhao.jp/~tsumu/Research/Intr_interferometry/interferometer.html


! 
https://www.ele-lab.com/index.html