Fault self-diagnosis method in resolver-to-digital converter

A fault self-diagnosis method in a resolver-to-digital converter uses a fault self-diagnosis circuit which comprises an edge detection circuit, a midpoint generation circuit, a phase shift detection circuit, a resolver signal amplitude detection circuit, a reference signal amplitude detection circuit, a signal step detection circuit and a fault signal detection circuit. The input end of the edge detection circuit is connected with a rotary transformer signal, a reference signal and a clock signal which are input externally, the output end of the fault signal detection circuit is a digital signal for indicating whether a fault occurs, the low level of the digital signal indicates that the converter detects abnormity, and the high level of the digital signal indicates that the converter does not detect abnormity. According to the invention, the input quantity of the converter and the working state of the converter are monitored by detecting the amplitude, the change rate and the phase difference ...

Namometre automotive metal finish

A nm-class paint for surface of car is prepared from multiple kinds of nm-class metal powder by advanced technique for preparing micron-class metal paint, and features unique technology, high quality, very high adhesive and the resistance to acid, alkali, oxidizing, wearing and impact, and sucking hermful rays and radiation from priming paint.

Chicken feed contg. nanometre iron and zinc micropowder

Type of turning round helps capable ware

The utility model provides a type of turning round helps capable ware, the utility model relates to a help capable ware in the pit, especially relate to one kind and have the inclined drifts of turning round and help capable ware. The utility model discloses the purpose helps capable ware mounting cost and equipment cost for the saving, the utility model discloses a technical scheme do: include tail overspeed device tensioner, frame rope sheave, aircraft nose drive arrangement, the rope on the aircraft nose drive arrangement is striden through a rope sheave II, then strides through the downside of pressing rope sheave II, anti rope sheave, I downside of pressure rope sheave, frame rope sheave I, is connected with tail overspeed device tensioner at last, rope sheave II is pressed to the anti rope sheave of corner installation one or more in tunnel, anti rope sheave the place ahead installation one or more, and anti rope sheave rear installation one or more presses rope sheave I. The utility ...

Calibration method of intersection-crossing bus priority demand time window

The invention discloses an intersection-crossing bus priority demand time window calibration method, which comprises the following steps of virtualizing a bus station and a signalized intersection into computing nodes; according to bus travel time between adjacent nodes, signal timing delay in signalized intersection nodes and stop time characteristics in bus stop nodes, probability distribution calculation models of buses arriving at and leaving the nodes are constructed respectively; through a retrieval table of a signalized intersection bus route entrance direction, crossing-intersection transmission of upstream bus information is effectively realized, and arrival probability distribution and a maximum distribution segment of the buses at the signalized intersection are obtained; an active vehicle request table of a bus request phase is dynamically updated, and a demand time window of the bus request phase is timely adjusted on the basis of the earliest maximum arrival probability distribution ...

Chicken feed of nanometre metal micropowder

The chicken feed is produced by adding certain amount of nanometre metal micropowder, such as iron as iron and zinc micropowder, into common chicken feed. Chicken obtains certain amount of trace elements to store in egg through feed so that people obtain trace elements essential for body from egg to ensure body's metabolism balance and health.

Circuit integrating over-current, over-temperature and transient suppression protection functions

The invention discloses a circuit integrating over-current, over-temperature and transient suppression protection functions, which can simultaneously realize circuit over-current, short circuit, over-temperature and other fault protection and transient current suppression during high-voltage power-on, and is high in circuit integration level. The high-voltage loop current sampling is carried out by adopting a secondary sampling circuit which carries out voltage division after resistor sampling and triode triggering, so that high-power interference noise and component type selection difficulty can be effectively reduced, the product size is reduced, and the anti-interference capability and reliability of the full-bridge inverter circuit are improved. By adopting a multi-triode temperature protection scheme, single-point to multi-point temperature monitoring protection can be realized, the complexity of a multi-point temperature monitoring circuit is effectively reduced, the universality ...