Ultrasonic wave detecting method of mechanical type heat meter base meter rotating frequency
A technology of rotation frequency and detection method, applied in the direction of measuring heat, calorimeters, measuring devices, etc., can solve the problems of interfering heat measurement, LC oscillating circuits are susceptible to electromagnetic interference, and cannot be fully satisfied, and achieve immunity from electromagnetic interference. The effect of signal interference and simple processing circuit
Inactive Publication Date: 2010-01-13
ZHEJIANG UNIV +1
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The non-magnetic detection method of detecting the rotation frequency of the base meter through the LC oscillating circuit, the flow measurement is not affected by the magnetic impurities in the water quality, but its LC oscillating circuit is easily affected by electromagnetic interference, which is obviously not completely satisfactory for household heat meters , because it means that the user may interfere with the calorie meter inadvertently or maliciously through strong electromagnetic tools such as hair dryers
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] The principle of the ultrasonic detection method for the rotation frequency of the base meter of the mechanical heat meter is as follows: figure 1 As shown, a measuring disk is installed in the base of the mechanical heat meter, which is coaxial with the base of the mechanical heat meter and rotates synchronously. When measuring, the base of the mechanical heat meter, the measuring disk and the two ultrasonic transducers are all Immersed in water, the base meter impeller and the measuring disc share the rotating shaft 3, and the liquid flows through to drive the impeller and the measuring disc to rotate synchronously. Half of the surface of the measuring disc is coated with a sound-absorbing material 1 capable of absorbing sound waves, such as a resin material, and the other half is coated with a reflective material 2 capable of reflecting sound waves, such as a metal material. The ultrasonic receiving transducer 4 and the ultrasonic transmitting transducer 5 are placed...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an ultrasonic detection method for base table rotational frequency of the mechanical heat meter. The inside of the base table of the mechanical heat meter is installed with a measurement disk which is immersed into water together with two ultrasonic transducers. The two ultrasonic transducers are arranged on the upper part of the measurement disk and present a V shape. One of the ultrasonic transmitting transducers continuously emits ultrasonic to the measurement disk. Half of the measurement is coated with sound-absorbing material, and the other half is coated with reflection material. The ultrasonic signal reflected by the measurement disk can be received by the other ultrasonic transmitting transducer. The amplitude of the ultrasonic receiving signal reflected by the reflection material is large. But the amplitude of the ultrasonic receiving signal reflected by the sound-absorbing material is small. The base table rotational frequency can be judged after the change of the ultrasonic signal reflected by the disk is detected by the signal processing circuit, so the flow quantity of the heat meter can be calculated. The method avoids the defects that the traditional detection method is easily influenced by the rust in water quality or the signal processing is easily interfered by the electromagnetic. The back end processing circuit is simple.
Description
technical field [0001] The invention relates to a detection method applied to the rotation frequency of the base meter of a mechanical heat meter, in particular to an ultrasonic detection method for the rotation frequency of the base meter of a mechanical heat meter. Background technique [0002] At present, mechanical heat meters are widely used because of their simple principle and easy implementation. The basic principle of the mechanical heat meter is to measure the flow by detecting the mechanical rotation frequency of the impeller in the base meter, and then obtain the heat. Existing methods for detecting the rotational frequency of the base meter of a mechanical heat meter can be classified into two types: magnetic detection and non-magnetic detection. Magnetic detection methods such as reed switches are used to detect the rotation frequency of the base meter. Since the measurement is easily affected by magnetic impurities such as rust in water quality, it has been g...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01K17/00
Inventor 付新胡亮顾其丰阮晓东叶朋
Owner ZHEJIANG UNIV