Flowmeter high-resolution count conversion device based on linear magnetic sensor
A magnetic sensor and high-resolution technology, which is applied in the field of high-resolution counting conversion devices for flowmeters, can solve the problems of unable to meet the collection requirements, and the high value can only reach the second-digit display unit value, so as to enhance the safety guarantee capability, Strong anti-magnetic interference ability and the effect of improving resolution
Active Publication Date: 2017-11-10
杭州先锋电子技术股份有限公司
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The above three methods can only reach the highest resolution of the counter’s second-digit indication unit value. For example, the last digit of the general civilian flowmeter counter’s indication value is 0.001 square meters, while the above methods can only reach 0.01 square meters at most. In fact, most manufacturers The resolution of smart meter reading is generally 0.1 square meters. For the abnormal situation of continuous small gas flow leakage, the above structure cannot meet the collection requirements
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[0034] Example: such as figure 2 As shown, in the head wheel ( figure 2 ) on the inner and outer walls corresponding to numbers 2 and 7, place magnetic steel with axial direction and opposite magnetic poles, place an acquisition circuit board under the number 2 near the edge of the word wheel, and set a linear magnetic sensor on the acquisition circuit board. When the ventilation is normal, the word The wheel rotates clockwise. When the magnetic steel at the number 2 is close to the acquisition circuit board below, the linear magnetic sensor collects the strongest N-pole magnetic field, and the indication value of the corresponding counter head wheel is '0'. When ventilation continues, 3 Number number sweeps the acquisition circuit board below, because the magnetic steel is far away, the N-pole magnetic field collected by the linear magnetic sensor is linearly attenuated. When running to numbers 4 and 5, the magnetic field is 0; then S As the pole magnetic field is getting ...
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The invention relates to a flowmeter high-resolution count conversion device based on a linear magnetic sensor. The flowmeter high-resolution count conversion device is characterized by comprising a counting rack, a counter, a driving gear and a linear magnetic sensor, wherein both the counter and the driving gear are arranged on the counting rack; the driving gear is used for driving the head wheel of the counter; two pieces of magnetic steel of opposite polarities are arranged on the head wheel; the two pieces of magnetic steel are positioned on a same straight line with the circle center of the head wheel; an acquisition circuit board is arranged on a tangent line below the head wheel; the acquisition circuit board is arranged on the counting rack; the linear magnetic sensor is arranged on the acquisition circuit board; the linear magnetic sensor is matched with the two pieces of the magnetic steel. The device is capable of improving real-time acquisition resolution and positioning digits of word wheels, has the characteristics of being good in magnetic interference resistance, low in cost and simple in structure, and is particularly applicable to acquisition requirements of a cut type membrane flowmeter on micro flow.
Description
technical field [0001] The invention relates to a flowmeter high-resolution counting conversion device based on a linear magnetic sensor. Background technique [0002] A large number of cut-off flowmeters currently in use on the market usually read the count value of the word wheel of the meter counter through electromechanical transformation of the meter counter. The common methods are: (1) Add a magnetic steel to the second round of the counter, use a dry yellow tube or a magnetic switch to count, and the counting resolution is the value indicated by the third round unit; if the magnetic steel is installed on the counter head wheel, the counting resolution The rate is the second round unit indication; (2) Transform the second round to the eighth round character wheel to use the photoelectric principle for direct reading; (3) Use image direct reading to identify the second round to the eighth round. The above methods (2) and (3) generally avoid the head wheel, because the ...
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Login to View More IPC IPC(8): G01F15/075
CPCG01F15/0755
Inventor 傅建华石扬
Owner 杭州先锋电子技术股份有限公司