[New patent introduction] A single-photosensitive water meter sensor

Today, I will introduce a national invention authorized patent-a single-photosensitive water meter sensor. The patent was applied for by Jinan Xixun Information Technology Co., Ltd., and the authorization was announced on December 29, 2017.

Content description

The invention relates to a water meter sensor, in particular to a water meter sensor which can collect the accumulated flow, instantaneous flow and forward and reverse state of the water meter by mainly using a photosensitive electronic element to operate the sensor.

Background of the invention

At present, the known dual photosensitive water meter sensor uses two photosensitive electronic components inside the sensor to collect the operating status of the mechanical water meter. Because the sensing areas of the two photosensitive electronic components are different, and there will be a presence between the two photosensitive electronic components. Sensing error, therefore, may cause a large difference in the optical information actually sensed by the two photosensitive electronic components, which can affect the collection accuracy and stability of the water meter sensor in severe cases. Due to the need to use two photosensitive electronic components to operate, the dual-photosensitive water meter sensor has the problems of high power consumption, high cost, and complex structure.

Summary of the invention

In order to solve the problem caused by the use of two photosensitive electronic components for the operation of the dual-sensitivity water meter sensor, the present invention provides a single-sensitivity sensor that mainly uses one photosensitive electronic element to operate inside the sensor to realize all the functions of the dual-sensitivity water meter sensor. -Type water meter sensor, and the water meter sensor has higher acquisition accuracy, better stability, lower power consumption, and lower cost than the dual-photosensitive water meter sensor.

The technical solution adopted by the present invention to solve the technical problem is: after the photosensitive part of the single-photosensitive water meter sensor is aligned with a point in the rotation track of the middle section of the water meter pointer, the sensor is then fixed on the dial glass of the water meter. The water meter sensor has a photosensitive electronic component and two light-emitting diodes. The two light-emitting diodes alternately emit flashes under the unified modulation of the control circuit in the water meter sensor, and the emitted light is dimmed by the lens and irradiates two parallelly arranged luminous uniforms along the water meter pointer rotation track in the water meter dial. A light spot that overlaps most of the sensing area of ​​the photosensitive electronic component. The rotating water meter pointer passes through the overlapping area of ​​the light spot and the sensing area. Because the color of the water meter pointer and the water meter dial is very different, according to the light absorption and diffuse reflection theory of the object color, the pointer with the color will absorb the light of other colors except its own color, and the intensity of the diffuse reflection light of the pointer Attenuated, so under the same incident light, the diffuse reflection light of the water meter pointer and the diffuse reflection light of the water meter dial have a sharp difference.

After the control circuit of the single-photosensitive water meter sensor controls a light-emitting diode to emit light, the photosensitive electronic element senses the diffuse reflected light, and the signal processing unit analyzes the diffuse reflected light, removes the interference of stray light, and obtains the change of the diffuse reflected light. When the change of diffuse reflection light has the distinctive feature of diffuse reflection light of the water meter pointer, it means that the water meter pointer is in the light spot of the light emitting diode in the sensing area of ​​the photosensitive electronic element. Because the two light-emitting diodes emit light alternately, and the light spot illuminating the dial is arranged side by side along the water meter pointer's rotating track, according to the difference of the light-emitting diode illuminating light spot that the water meter pointer enters first, the forward and reverse of the water meter pointer can be recognized status. According to two consecutive monitoring of the time it takes for the pointer to rotate forward, the cycle of pointer rotation is known. The instantaneous flow rate and the accumulated flow rate of the water meter can be calculated according to the monitored forward and reverse state of the water meter pointer, the rotation period and the cumulative number of turns.

The beneficial effects of the present invention are: the single photosensitive water meter sensor mainly uses a photosensitive electronic element to run inside to realize all the functions of the dual photosensitive water meter sensor, and the water meter sensor has higher acquisition accuracy than the dual photosensitive water meter sensor. The stability is better, the power consumption is smaller, and the cost is lower.

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