34results about How to "Measurement result influence" patented technology

A liquid sample carbon and nitrogen stable carbon isotope determination pretreatment method. The invention belongs to the technical field of sample pretreatment, and in particular relates to a pretreatment method for measuring carbon and nitrogen stable carbon isotopes of liquid samples. The invention aims to solve the problem that the error of the detection result is large or even the result cannot be detected due to the insufficient concentration of the injection sample in the existing detection method. Methods: 1. Preparation of zeolite powder; 2. Preparation of liquid sample to be tested; 3. Detection. The method of the invention requires 10 times lower requirements on the concentration of carbon and nitrogen in the liquid than the standard liquid automatic sampler injection method, and also reduces the requirement on the volume of the sample to be tested by 50 times. Secondly, the zeolite used as an additive is a porous silicon-aluminum oxide, which is very cheap and has a very good water absorption effect. More importantly, it will not affect the determination results of carbon and nitrogen stable isotopes, and the steps are simple and easy to operate.

The invention relates to a circuit for measuring a voltage transformer voltage coefficient, and further relates to a method for measuring the voltage transformer voltage coefficient through the circuit. The circuit for measuring the voltage transformer voltage coefficient comprises a first single-stage voltage transformer (T1), a second single-stage voltage transformer (T2) and a passive linear circuit composed of an isolation transformer (T3). Both the rated transformation ratio of the first single-stage voltage transformer (T1) and the rated transformation ratio of the second single-stage voltage transformer (T2) are equal to K; the rated transformation ratio of the isolation transformer (T3) is equal to 1; a primary low-voltage terminal (X1) of the first single-stage voltage transformer (T1) is connected with a primary high-voltage terminal A2 of the second single-stage voltage transformer (T2); a secondary high-voltage terminal a1 of the first single-stage voltage transformer (T1) is connected with a primary high-voltage terminal A3 of the isolation transformer (T3); a secondary low-voltage terminal x1 of the first single-stage voltage transformer (T1) is connected with a primary low-voltage terminal X3 of the isolation transformer (T3); a secondary low-voltage terminal x3 of the isolation transformer (T3) is connected with a secondary high-voltage terminal a2 of the second single-stage voltage transformer (T2). According to the circuit and method for measuring the voltage transformer voltage coefficient, the effect of shielding errors of a voltage transformer on a series addition line can be overcome, and power frequency voltage addition can be effectively used in a 220 kV high-voltage interval and can even be used in a 330kV-1000kV extra-high-voltage interval.

The invention discloses a flowing type cell testing device and a method of realizing the flowing type cell test thereof. The flowing type cell testing device provided by the invention comprises a flowing chamber, a sample injector, a reaction bath, a sheath liquid bath and a plurality of valves, wherein the reaction bath is connected with a main interface of the sample injector through a first valve and a sixth valve, a seventh valve arranged between the sixth valve and the first valve is connected with the sheath liquid bath or other pressure storage baths. The flowing type cell testing method comprises the processes of establishing and testing a stable sample flow, etc. In the process of establishing and testing the stable sample flow, the sixth valve is closed and simultaneously the first valve and the seventh valve are opened, thereby enabling the sheath liquid in the sheath liquid bath to flow into the reaction bath for cleaning the reaction bath from bottom to top. The flowing type cell testing device and the method of realizing the flowing type cell test provided by the invention are capable of simultaneously cleaning the reaction bath from bottom to top in the testing process, thereby greatly improving the working efficiency of the whole system.

The invention relates to a dynamic clearance measuring instrument and a measuring method. The dynamic clearance measuring instrument comprises a clearance probe (4), an excitation assembly and a displacement measuring assembly; the excitation assembly comprises a vibrator (6), a vibrator fixing rod (7) and a vibration control loop (5), wherein the vibrator (6) is arranged on the vibrator fixing rod (7); the displacement measuring assembly includes an eddy current displacement sensor (3) and a displacement sensor fixing rod (2); the clearance probe (4) used for measuring a clearance is sheathed with the vibration control loop (5); the vibration control loop (5) is connected with the vibrator (6), so that the vibration response of the vibrator (6) can be transmitted to the clearance probe (4); and the eddy current displacement sensor (3) arranged on the displacement sensor fixing rod (2) measures the displacement response of the clearance probe (4).

The present invention provides a disturbed heat output type flow measuring device and a measuring method and the present invention relates to a method of measuring the liquid flow in the flow field having a heat transmitting process in the inner of the pipe-case type heat interchanger and the corresponding device. The heat transferring pipe (6) of the measuring device is positioned in the field of the flow to be measured; the pipe-case type heat interchanger hydroeciums (5) are positioned on the two ends of the heat transferring pipe (6); each end of a measuring heat interchanger is provided with a set of disturbed operational servo (1); a flexible piston valve (2) is provided on the head of the valve pole of the disturbed operational servo (1); a temperature measuring sensor which is connected to an industrial personal computer (4) through a temperature measuring module (7) is embedded on the two ends of the inner of the measuring heat interchanger along the axes direction of the piston valve (2), thus, a set of moveable probe head for measuring is formed; the output end of the industrial personal computer (4) controls the movement of the disturbed operational servo (1) by connecting to an electromagnetic valve (10) through a switch control module (8) and a relay group (9) and by connecting the output end of the electromagnetic valve (10) to the disturbed operational servo (1) through a hydraulic tube (13).