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The Application Of Rotary Joints In Radar Control System

Dditors:gassrini Time:2017-04-27

With the diversification of radar systems, all kinds of rotating combination application in radar system is becoming more frequent, The rotary combination is a rotary transmission device for connecting the equipment cabin and the antenna in the radar system. Its task is to make the fixed and rotating ends of the various electrical signals, optical signals, power or liquid or gas medium rotation transmission. Rotary joint is the indispensable key device in the mechanical scan radar system, it is used in radar antenna.

 

Jinpat LPHF rotary joint series slip ring is a slip ring and high frequency rotary joint LPCC series in one of the mixed slip ring

LPHF rotary joint series of slip ring is a mixed type slip ring that integrated electronic slip ring and high frequency rotary joint. In addition to realize the function of the traditional electrical slip ring, it also can through the high frequency rotary joint transmission frequency up to 500 MHZ - more than 50 GHZ analog signals and high speed digital signals. This series of slip ring performance is remarkable, its signal attenuation loss and transmission fluctuations in ultra-low, which has been widely used in air traffic control, missile defense systems and other aerospace fields.

 

Features:

1, high frequency channel up to 37 circuits

2, the frequency range up to 50GHz

Customization options:

1, the number of channels

2, the number of high frequency channels

3, rated voltage and rated current

4, the end of the wire connector

5, the length of the wire

6, support broadband signal and current or other signal mixed transmission

 

Typical Application:

1, radar antenna

2, air traffic control

3, satellite communication system

Other customizable rotary joint type

Hybrid slip ring 1 ------ The combination of the electric slip ring and the fiber optic rotary joint

Hybrid slip ring 2 ----- The slip ring is combined with the high frequency rotary joint

Hybrid slip ring 3 ----- The slip ring is combined with the hydraulic / pneumatic rotary joint

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<?php

/**
 * @file
 * Administrative script for running authorized file operations.
 *
 * Using this script, the site owner (the user actually owning the files on
 * the webserver) can authorize certain file-related operations to proceed
 * with elevated privileges, for example to deploy and upgrade modules or
 * themes. Users should not visit this page directly, but instead use an
 * administrative user interface which knows how to redirect the user to this
 * script as part of a multistep process. This script actually performs the
 * selected operations without loading all of Drupal, to be able to more
 * gracefully recover from errors. Access to the script is controlled by a
 * global killswitch in settings.php ('allow_authorize_operations') and via
 * the 'administer software updates' permission.
 *
 * There are helper functions for setting up an operation to run via this
 * system in modules/system/system.module. For more information, see:
 * @link authorize Authorized operation helper functions @endlink
 */

/**
 * Root directory of Drupal installation.
 */
define('DRUPAL_ROOT', getcwd());

/**
 * Global flag to identify update.php and authorize.php runs, and so
 * avoid various unwanted operations, such as hook_init() and
 * hook_exit() invokes, css/js preprocessing and translation, and
 * solve some theming issues. This flag is checked on several places
 * in Drupal code (not just authorize.php).
 */
define('MAINTENANCE_MODE', 'update');

/**
 * Renders a 403 access denied page for authorize.php.
 */
function authorize_access_denied_page() {
  drupal_add_http_header('Status', '403 Forbidden');
  watchdog('access denied', 'authorize.php', NULL, WATCHDOG_WARNING);
  drupal_set_title('Access denied');
  return t('You are not allowed to access this page.');
}

/**
 * Determines if the current user is allowed to run authorize.php.
 *
 * The killswitch in settings.php overrides all else, otherwise, the user must
 * have access to the 'administer software updates' permission.
 *
 * @return
 *   TRUE if the current user can run authorize.php, otherwise FALSE.
 */
function authorize_access_allowed() {
  return variable_get('allow_authorize_operations', TRUE) && user_access('administer software updates');
}

// *** Real work of the script begins here. ***

require_once DRUPAL_ROOT . '/includes/bootstrap.inc';
require_once DRUPAL_ROOT . '/includes/session.inc';
require_once DRUPAL_ROOT . '/includes/common.inc';
require_once DRUPAL_ROOT . '/includes/file.inc';
require_once DRUPAL_ROOT . '/includes/module.inc';
require_once DRUPAL_ROOT . '/includes/ajax.inc';

// We prepare only a minimal bootstrap. This includes the database and
// variables, however, so we have access to the class autoloader registry.
drupal_bootstrap(DRUPAL_BOOTSTRAP_SESSION);

// This must go after drupal_bootstrap(), which unsets globals!
global $conf;

// We have to enable the user and system modules, even to check access and
// display errors via the maintenance theme.
$module_list['system']['filename'] = 'modules/system/system.module';
$module_list['user']['filename'] = 'modules/user/user.module';
module_list(TRUE, FALSE, FALSE, $module_list);
drupal_load('module', 'system');
drupal_load('module', 'user');

// We also want to have the language system available, but we do *NOT* want to
// actually call drupal_bootstrap(DRUPAL_BOOTSTRAP_LANGUAGE), since that would
// also force us through the DRUPAL_BOOTSTRAP_PAGE_HEADER phase, which loads
// all the modules, and that's exactly what we're trying to avoid.
drupal_language_initialize();

// Initialize the maintenance theme for this administrative script.
drupal_maintenance_theme();

$output = '';
$show_messages = TRUE;

if (authorize_access_allowed()) {
  // Load both the Form API and Batch API.
  require_once DRUPAL_ROOT . '/includes/form.inc';
  require_once DRUPAL_ROOT . '/includes/batch.inc';
  // Load the code that drives the authorize process.
  require_once DRUPAL_ROOT . '/includes/authorize.inc';

  // For the sake of Batch API and a few other low-level functions, we need to
  // initialize the URL path into $_GET['q']. However, we do not want to raise
  // our bootstrap level, nor do we want to call drupal_initialize_path(),
  // since that is assuming that modules are loaded and invoking hooks.
  // However, all we really care is if we're in the middle of a batch, in which
  // case $_GET['q'] will already be set, we just initialize it to an empty
  // string if it's not already defined.
  if (!isset($_GET['q'])) {
    $_GET['q'] = '';
  }

  if (isset($_SESSION['authorize_operation']['page_title'])) {
    drupal_set_title($_SESSION['authorize_operation']['page_title']);
  }
  else {
    drupal_set_title(t('Authorize file system changes'));
  }

  // See if we've run the operation and need to display a report.
  if (isset($_SESSION['authorize_results']) && $results = $_SESSION['authorize_results']) {

    // Clear the session out.
    unset($_SESSION['authorize_results']);
    unset($_SESSION['authorize_operation']);
    unset($_SESSION['authorize_filetransfer_info']);

    if (!empty($results['page_title'])) {
      drupal_set_title($results['page_title']);
    }
    if (!empty($results['page_message'])) {
      drupal_set_message($results['page_message']['message'], $results['page_message']['type']);
    }

    $output = theme('authorize_report', array('messages' => $results['messages']));

    $links = array();
    if (is_array($results['tasks'])) {
      $links += $results['tasks'];
    }
    else {
      $links = array_merge($links, array(
        l(t('Administration pages'), 'admin'),
        l(t('Front page'), '<front>'),
      ));
    }

    $output .= theme('item_list', array('items' => $links, 'title' => t('Next steps')));
  }
  // If a batch is running, let it run.
  elseif (isset($_GET['batch'])) {
    $output = _batch_page();
  }
  else {
    if (empty($_SESSION['authorize_operation']) || empty($_SESSION['authorize_filetransfer_info'])) {
      $output = t('It appears you have reached this page in error.');
    }
    elseif (!$batch = batch_get()) {
      // We have a batch to process, show the filetransfer form.
      $elements = drupal_get_form('authorize_filetransfer_form');
      $output = drupal_render($elements);
    }
  }
  // We defer the display of messages until all operations are done.
  $show_messages = !(($batch = batch_get()) && isset($batch['running']));
}
else {
  $output = authorize_access_denied_page();
}

if (!empty($output)) {
  print theme('update_page', array('content' => $output, 'show_messages' => $show_messages));
}

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