Sany Heavy Industry Co., Ltd.

Yonghong Liu

Xiaogang Yi

Xionghui Miao

Jihui Zhou

Guocheng Peng

Yaohui Ou

Chengzhi Guo

A matching authentication method for wireless communication equipment comprises that: a device at the transmitting end sends a matching request (S) to a device at the receiving end; the device at the transmitting end receives the response messages feedback from the device at the receiving end, and the response message carry with feature codes (S); the device at the transmitting end obtains the feature codes and takes the feature codes as the authentication and authorization codes communicating with the receiving end. The invention also provides a wireless communication device with the function of matching authentication correspondingly. The wireless communication device comprises a memory unit, a communication unit, and an authentication and authorization unit and a feature code updating unit. The invention also provides a wireless communication system with the function of matching authentication correspondingly.

Matching authentication method, device and system for wireless communication

The present invention discloses a method and device for suppressing vibration of boom of concrete pump truck, in which the boom cylinder is connected with the vibration suppression cylinder; the information about hydraulic pressure in the boom cylinder and/or about changing of concrete pumping direction is monitored by a pressure sensing unit in real time; the monitored information about hydraulic pressure and/or about changing of concrete pumping direction is transmitted to the control unit for vibration suppression cylinder; the control unit for vibration suppression cylinder analyzes and processes the monitored information and adjusts the volumes of the rod side chamber and the non-rod side chamber in the vibration suppression cylinder such that the vibration suppression cylinder may generate a pulsed vibration and the pulsed vibration at the end of the boom is less than or equal to the vibration amplitude caused by the intermittent concrete supply at the end of the boom in amplitude, with a phase difference of 180&#xb0; between the two vibrations. The vibration suppression method and device for boom of concrete pump truck according to the present invention may be simply configured, easily implemented and operated to effectively suppress the boom vibration.

Method and device for suppressing vibration of boom of concrete pump truck

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Changsha, China

Yonghong Liu