49results about How to "Avoid detecting blind spots" patented technology

The invention provides a remote fault monitoring and pre-warning system and method for motor train unit traction transformer oil pumps and belongs to the technical field of transformers. The problem that in the prior art, devices for remotely monitoring the offset of bearings of the transformer oil pumps are lacked is solved by the remote fault monitoring and pre-warning system and method for the motor train unit traction transformer oil pumps. The fault monitoring and pre-warning system comprises a cloud calculation center, a plurality of in-situ monitors and a plurality of clients, wherein the in-situ monitors and the clients are connected with the cloud calculation center; and the in-situ monitors are used for detecting the offset of rotor bearings of transformers; the cloud calculation center is used for analyzing data, judging the operation condition of the transformer oil pumps corresponding to the in-situ monitors and outputting the result to the clients to be displayed. The method includes the steps that A, a PCA pivot element model is established; B, comparing judgment is performed; and C, the comparison result is output. The remote fault monitoring and pre-warning system and method for the motor train unit traction transformer oil pumps can achieve local and remote fault monitoring and pre-warning of the transformers, monitoring is comprehensive, real-time display is achieved, and practicability is high.

The invention discloses an automobile air-conditioning system sealing detection and refrigerant injection device, and aims at providing the automobile air-conditioning system sealing detection and refrigerant injection device which can effectively perform airtightness detection on an automobile air-conditioning system and can directly perform refrigerant injection after completion of detection and is great in functional integration and high in working efficiency. The automobile air-conditioning system sealing detection and refrigerant injection device comprises a PLC and a master electromagnetic valve. The master electromagnetic valve is provided with an atmosphere access in-valve path, a vacuum pumping in-valve path, a refrigerant inlet in-valve path, a refrigerant injection in-valve path and an in-valve cavity which is communicated with all the in-valve paths. The vacuum pumping in-valve path is connected with a vacuum pump through a pumping pipeline. The pumping pipeline is provided with a vacuum pressure sensor. The refrigerant inlet in-valve path is connected with a refrigerant liquid storage tank through a refrigerant inlet system. The refrigerant inlet system comprises a refrigerant inlet pump, a refrigerant flowmeter and a refrigerant inlet non-return valve. The refrigerant injection in-valve path is connected with a refrigerant injection adapter through a refrigerant injection pipeline. The refrigerant injection pipeline is provided with a refrigerant injection pressure gauge.

The present invention provides an anti-pinch automatic door, including: a guide rail, a first door body and a second door body slidingly connected with the guide rail, a motor for pushing the first door body and the second door body, and multiple infrared detectors , Hall sensor and controller, the first door body is provided with the first anti-clamping edge, the second door body is provided with the second anti-clamping edge, the output shaft of the motor is provided with a magnetic ring, and the Hall sensor is arranged at the output of the motor On the side of the shaft, a plurality of infrared detectors are arranged on the second elastic buffer at intervals along the length direction of the second elastic buffer, and the infrared detectors and Hall sensors are respectively connected to the controller for signals, and the controller controls the connected motor. The present invention realizes multiple protection through a plurality of infrared detectors, first and second anti-pinch sides and Hall sensors, and effectively prevents people from being pinched by the first and second doors being closed.

The present invention relates to the technical field of packaging box detection, in particular to a packaging box strength testing device and testing method, which includes a base, a downward pressure detection part and a corner detection part. On the pressure detection part; the existing detection device has the following problems: when the detection device is fixed to the packaging box, it is easy to make the packaging box tilt, thereby easily affecting the detection accuracy of the packaging box; the detection device can only detect the longitudinal direction of the packaging box. Compressive strength, the transverse compressive strength at the corner of the packaging box cannot be detected, so that the packaging box cannot be fully tested; the invention can clamp and limit the packaging box in all directions through four guide splints, which can avoid the occurrence of Tilting to ensure the detection accuracy of the packing box; the invention can detect the longitudinal compressive strength of the packing box and the transverse compressive strength of the corner at the same time, so as to facilitate the comprehensive detection of the packing box.