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采用蓝牙Mesh的污染参数监测系统 - bluetooth蓝牙技术
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Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

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  • 开发平台: Arduino, Atmel, Cypress, LabVIEW, MATLAB
  • 许可协议: GNU General Public License, version 3 or later (GPL3+)
项目中使用的工具物品 硬件 Arduino Uno - R3 LCD液晶屏套件16x2字符显示 Analog 气体传感器(MQ2) 40针公插头 10 个 USB A/Micro 线束 - 2m 10 跳线 150mm CYW20819 BLE Mesh 5.0 开发板 软件、App和在线服务 Arduino IDE Wiced Smart ( from CYPRESS) Modus Toolbox 1.1 (from CYPRESS) 手工工具和制造器械 烙铁 插头, 特殊线   故事 研制了一套移动实时空气污染监测系统。这个系统正在开发中，目的是实时监测污染。本系统采用低成本的空气质量监测传感器与GPS和GSM/GPRS模块或蓝牙网状网络。各种气体的浓度将使用半导体传感器测量，并使用GPS模块定位该浓度。这个浓度将在不同的地点实时测量。传感器采集数据后将使用GPRS/蓝牙模块连同获得的位置将数据发送到数据库。上述工作的基础是提供一个实时动态的污染测量系统。.   当我们见证了技术的发展，我们可以感受到它的两面性。随着工业时代的到来，开始大规模生产和对宝贵资源的过度开发，污染是当今最具争议的问题之一。在控制任何东西之前，重要的是测量它，考虑到这一点，发明者探索了测量技术，我们现在可以看到许多这样的技术是可用的。但是，如果仔细研究污染的来源和产生的模式，就会发现，目前可用的技术是不够的。所有流行的技术都是静态的，它们的传感器被植入一个地方，然后从那里测量一个地区的污染。因此，缺乏实时、定位的污染监测技术。考虑到所有这些限制，我们设计了一个系统，可以植入任何方式的交通(市政公共汽车，州交通)，它有一个巨大的网络，可接近几乎每个地区。然后通过GPRS模块将系统采集到的数据连同经纬度一起发送到网站和在线数据库。Inventers赞扬了现有的空气污染测量系统，并设计了一个更好、更可靠的实时和定位的空气污染测量系统。   这里我用原型实现了2个案例的研究，并比较了结果:   (1)使用直接GPRS模块传输数据和   (2)使用蓝牙mesh网络进行相同的工作   案例研究1:使用GPRS模块 提出了一种基于GPS接收器和GPRS模块的移动污染参数监测系统。...

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Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as the key parameter for array_key_exists() is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php on line 323

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/src/Menu/AbstractMenu.php on line 164

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 217

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 219

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 227

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 231

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 234

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 237

Deprecated: Using null as an array offset is deprecated, use an empty string instead in /var/www/html/libraries/CBLib/CB/Legacy/LegacyFoundationFunctions.php on line 239

Deprecated: Method ReflectionProperty::setAccessible() is deprecated since 8.5, as it has no effect since PHP 8.1 in /var/www/html/plugins/system/falangdriver/falangdriver.php on line 100

Deprecated: Method ReflectionProperty::setAccessible() is deprecated since 8.5, as it has no effect since PHP 8.1 in /var/www/html/plugins/system/falangdriver/falangdriver.php on line 100
mysqli object is already closed (500 Whoops, looks like something went wrong.)

Error

HTTP 500 Whoops, looks like something went wrong.

mysqli object is already closed

Exception

Error

in /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php (line 318)
  1. */
  2. public function disconnect()
  3. {
  4. // Close the connection.
  5. if (\is_callable([$this->connection, 'close'])) {
  6. $this->connection->close();
  7. }
  9. parent::disconnect();
  10. }
in /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php -> close (line 318)
  1. */
  2. public function disconnect()
  3. {
  4. // Close the connection.
  5. if (\is_callable([$this->connection, 'close'])) {
  6. $this->connection->close();
  7. }
  9. parent::disconnect();
  10. }
in /var/www/html/libraries/vendor/joomla/database/src/DatabaseDriver.php -> disconnect (line 496)
  1. *
  2. * @since 2.0.0
  3. */
  4. public function __destruct()
  5. {
  6. $this->disconnect();
  7. }
  9. /**
  10. * Alter database's character set.
  11. *
DatabaseDriver->__destruct()

Stack Trace

Error 
Error:
mysqli object is already closed

  at /var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:318
  at mysqli->close()
     (/var/www/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:318)
  at Joomla\Database\Mysqli\MysqliDriver->disconnect()
     (/var/www/html/libraries/vendor/joomla/database/src/DatabaseDriver.php:496)
  at Joomla\Database\DatabaseDriver->__destruct()

Deprecated: Method ReflectionProperty::setAccessible() is deprecated since 8.5, as it has no effect since PHP 8.1 in /var/www/html/plugins/system/falangdriver/falangdriver.php on line 100

Deprecated: Method ReflectionProperty::setAccessible() is deprecated since 8.5, as it has no effect since PHP 8.1 in /var/www/html/plugins/system/falangdriver/falangdriver.php on line 100