52results about How to "Few measurement parameters" patented technology

The invention discloses a simple testing method for testing the inductance of a direct axis and a quadrature axis of a permasyn motor, which has the following procedures that: any two phases of a stator are short-circuited, then a magnetic pole of a rotator is fixed in the position of an included angle of 0 degree or 90 degrees between the d axis of the magnetic pole and the phase of the stator which is not short-circuited by a simple rotator position adjusting mechanism; a voltage pulse signal is imposed on a series circuit which is formed by the non-short circuited phase of the stator and any other phase, the information of the whole current i which flows through the series circuit, the information of the voltage u at the two ends of the series circuit and the information of sampling time t are recorded, then the direct axis inductance and the quadrature axis inductance of the stator winding at the time t can be obtained after simple calculations. The simple testing method for testing the inductance of a direct axis and a quadrature axis of a permasyn motor also discloses a simple testing device for testing testing inductance of a direct axis and a quadrature axis of a permasyn motor. By using the techniques of the simple testing method for testing the inductance of a direct axis and a quadrature axis of a permasyn motor, a precise test of the inductance of a direct axis anda quadrature axis of a permasyn motor can be realized, and the calculation is simple, without occupying a great amount of calculating resources.

The invention relates to the technical field of concrete mixers, in particular to a method for measuring the volume of agglomerates in a mixing tank, which comprises the following steps: measuring the unladen weight M of the mixing tank; measuring the laden weight G of the mixing tank; according to the formula T=G-M, calculating the weight T of the agglomerates in the mixing tank; and according to the formula V=T / K, calculating the volume V of the agglomerates in the mixing tank (K is a preset weight per volume of the agglomerates). The method can be used for quickly and accurately measuring the volume of the agglomerates in the mixing tank, provide accurate values for costumers and transport users, effectively prevent the material theft phenomenon in the transport process of the mixer, and provide a basis for judging whether the actual volume of the agglomerates is consistent with the preset volume. The invention also discloses a system, a device and a mixer for measuring the volume of the agglomerates in a mixing tank.

A method for measuring the efficiency of an independent condensing steam-driven feed pump includes a steam-driven feed pump, a small steam turbine, a condenser, a temperature measurement point, a pressure measurement point, a flow measurement point, and the like. The invention studies the steam-driven feed water pump, the small steam turbine and the condenser as a whole, calculates the shaft power of the steam-driven feed water pump based on the thermodynamic method, and then obtains the efficiency of the steam-driven feed water pump. There are few parameters to be measured, the measurement cost is low, and the measurement error has little impact on the results. Only need to measure: the inlet flow, pressure, and temperature of the steam-powered feed pump, the outlet pressure and temperature of the steam-powered feed pump, and the inlet steam pressure of the small steam turbine. , temperature, condenser circulating water inlet pressure, temperature, flow, condenser circulating water outlet pressure, temperature, hot well condensate temperature, pressure, flow. In order to fully understand the performance of the independent condensing steam-driven feed pump, provide a reliable basis for guiding the economical and safe operation of the steam-driven feed pump, and put forward reasonable suggestions and improvement directions for future economic operation.

A heating distribution network hydraulic work condition measuring method and equipment belong to heat supply network move bugging field. Set temperature sensor and hot water runoff sensor on the entrance of each heating spur track to heating distribution network to test the water supply temperature tg and actual testing runoff Lt of the hot water to the heating spur track. Set temperature sensor on the export to heating spur track, inside and outside room of the consumer to test the backwater th to heating spur track, indoor temperature tn and outdoor temperature tw of the consumer. The said sensor send testing value to the data disposal system and the said system deals with the data to get water power maladjustment x of each heating spur track and fact demand flux Ls to each heating user. It ensures the fact demand flux of heating distribution network based on the locale fact load of heating user without destroy the existing pipe system. Its operation is easy with few test parameters for using at locale.