35results about How to "Avoid manual detection errors" patented technology

The invention discloses a high-reliability DC power supply for a substation and a testing method. In order to overcome the problem that the battery packs of the prior art DC power supply system are connected in series and have poor reliability; the charging and discharging experiments cannot fully discover the hidden dangers of battery failure; the present invention adopts a busbar, AC / DC module, circuit breaker and DC load; The battery pack; the bidirectional DC / DC module is set between the DC bus and the battery module to indirectly control the charging and discharging of the battery module; the monitoring unit monitors the data of the battery module, judges the state of the battery module according to the data, and controls the bidirectional DC / DC The output voltage of the module; the host computer is connected with the monitoring unit through a communication protocol, receives and stores monitoring data, and sends control commands remotely. Guarantee the power supply of the DC system, avoid the lagging effect of a single battery pack, and improve reliability; the smoother process of the battery pack is simple; it can realize the checking discharge of 100% of the rated capacity of the DC power supply, and completely find out the hidden dangers of failure.

The invention discloses a sound detection method, device and system of a display device, wherein the sound detection method of a display device includes a signal source interface, and the sound detection method includes the following steps: The audio output by the display device, the audio output by the display device is generated based on the audio detection signal input to the signal source interface; the audio collected by the audio collection device is analyzed to obtain a sound detection result. The display detection method provided by the present invention can replace workers to detect display devices, so as to avoid manual detection errors, such as missed detection, false detection and the like.

The invention discloses a detector of a cigar lighter. The detector comprises a signal detection acquisition system and a data detection process and display system, wherein the signal detection acquisition system consists of alternating current, a switching power supply, a current transformer and an analog-to-digital conversion module EM231, the alternating current is electrically connected with the switching power supply, the switching power supply is electrically connected with the cigar lighter, the current transformer is in parallel connection with a branch circuit which is connected with the cigar lighter, and the current transformer is connected with the analog-to-digital conversion module EM231; and the data detection process and display system consists of a SIMENS PLC (programmable logic controller) and a touch screen, and the SIMENS PLC S7-200 is connected with the analog-to-digital conversion module EM231 by signals and is electrically connected with the touch screen. The detector of the cigar lighter, disclosed by the invention, can finally detect a finished product of the cigar lighter, avoids unknown errors in an assembly process, and has the advantages of simple device, convenience for operation and good visualization effect.

The invention discloses a method for detecting the service life of a metal knuckle bearing in a fixing hinge of a low-floor tramcar, and the method comprises the steps: setting the metal knuckle bearing in the fixing hinge of the low-floor tramcar into three parts: a metal knuckle external seat sleeve, an external rolling ball sleeve, and an internal rolling ball; setting the external rolling ball sleeve in the metal knuckle external seat sleeve, setting the internal rolling ball in the external rolling ball sleeve, and setting a first wear-resistant lining between the metal knuckle external seat sleeve and the external rolling ball sleeve; making the spherical contact between the internal rolling ball and the external rolling ball sleeve and between the external rolling ball sleeve and the first wear-resistant lining, and combining the metal knuckle external seat sleeve, the external rolling ball sleeve, the internal rolling ball and the first wear-resistant lining to form an integrated metal knuckle bearing through screws; and detecting the service life of the integrated metal knuckle bearing through detecting the wear degree of the first wear-resistant lining. According to the invention, the method can achieve the accurate detection of the service life of the metal knuckle bearing in the fixing hinge of the low-floor tramcar, reduces the maintenance cost, and guarantees the use performance and safety performance.