CN-224231973-U - Ultrasonic anti-overflow sensor

CN224231973UCN 224231973 UCN224231973 UCN 224231973UCN-224231973-U

Abstract

The utility model relates to the technical field of sensors, in particular to an ultrasonic anti-overflow sensor, which comprises a transmitting transducer, a receiving transducer, a driving circuit, an amplifying and filtering circuit, a detection circuit, a power module and an MCU (micro control unit) processor. Through the structure, the MCU processor is excited to enable the transmitting transducer to transmit stronger ultrasonic waves, the ultrasonic waves are reflected after being propagated in the air and meet all surfaces of the cup, and the receiving transducer obtains electric signals by partially reflecting waves due to the inverse piezoelectric effect. Because there is the difference in height between cup edge and the bottom of cup to make in the ultrasonic wave from transmitting to receiving the in-process, cup edge and bottom of cup incident path and reflection route all are inconsistent, finally appear that two echo signals have obvious phase difference, realize the function of discernment whether there is the cup, discern whether there is the cup through this sensor, then can then replace the control signal of manual output to the retaining system, and then make the retaining system go out water or close.

Inventors

LI MING
ZHANG XIANGBIN
HU YU
HU HAOTAO
LI HAO

Assignees

成都英萨传感技术研究有限公司

Dates

Publication Date: 20260512
Application Date: 20250401

Claims (10)

1. The utility model provides an ultrasonic wave anti-overflow sensor, its characterized in that includes transmitting transducer, receiving transducer, drive circuit, amplification filter circuit, detection circuit, power module and MCU treater, drive circuit one end with transmitting transducer connects, the other end with the MCU treater is connected, receiving transducer with amplification filter circuit connects, amplification filter circuit is connected with detection circuit and MCU treater respectively, detection circuit's the other end with the MCU treater is connected, power module with drive circuit connects.
2. The ultrasonic spill-resistant sensor of claim 1, wherein the MCU processor comprises an ADC module and a data processing module, the ADC module being coupled to the data processing module.
3. The ultrasonic anti-overflow sensor according to claim 2, wherein the amplifying and filtering circuit comprises a primary operational amplifier module and a secondary operational amplifier module, the input end of the primary operational amplifier module is connected with the receiving transducer, the output end of the primary operational amplifier module is connected with the input end of the secondary operational amplifier module, and the output end of the secondary operational amplifier module is respectively connected with the detection circuit and the ADC module.
4. The ultrasonic spill-proof sensor of claim 3, further comprising a main control board and a power management module, wherein the main control board is connected with the power management module, the power management module is used for controlling power supply of the power module, and the main control board is connected with the data processing module through a communication interface.
5. The ultrasonic spill-resistant sensor of claim 4, wherein the transmitting transducer comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first acquisition module, and a second acquisition module; The first resistor is respectively connected with the third resistor and the MOS tube, the second resistor is respectively connected with the fourth resistor and the MOS tube, and the other ends of the third resistor and the fourth resistor are simultaneously connected with the MOS tube; The first acquisition module and the second acquisition module are respectively connected with the MOS tube.
6. The ultrasonic spill-resistant sensor of claim 5, wherein the first acquisition module comprises a fifth resistor, a sixth resistor, a seventh resistor, a first crystal, a first diode, a second diode, and a first transformer; The fifth resistor is connected with the first transformer, and two ends of the first crystal and the sixth resistor which are connected in parallel are connected with the first transformer; One end of the first diode and one end of the second diode which are connected in parallel are connected with the seventh resistor, the other end of the first diode is connected with the sixth resistor, and the other end of the seventh resistor is connected with the other end of the sixth resistor.
7. The ultrasonic spill-resistant sensor of claim 6, wherein the second acquisition module comprises an eighth resistor, a ninth resistor, a tenth resistor, a second crystal, a third diode, a fourth diode, and a second transformer; the eighth resistor is connected with the second transformer, and two ends of the second crystal and the ninth resistor which are connected in parallel are connected with the second transformer; One end of the third diode and one end of the fourth diode which are connected in parallel are connected with the tenth resistor, the other end of the third diode is connected with the ninth resistor, and the other end of the seventh resistor is connected with the other end of the sixth resistor.
8. The ultrasonic spill-resistant sensor of claim 7, wherein the receiving transducer comprises a first electronic switch, a second electronic switch, a first capacitor and a second capacitor, the first acquisition module is connected with the first capacitor, the other end of the first capacitor is connected with the first electronic switch, the second acquisition module is connected with the second capacitor, the other end of the second capacitor is connected with the second electronic switch, and one of the first electronic switch and the second electronic switch is simultaneously connected with the first-stage operational amplifier module.
9. The ultrasonic spill-resistant sensor of claim 8, wherein the primary op-amp module comprises an eleventh resistor, a twelfth resistor, a thirteenth resistor, a third capacitor, a fourth capacitor, and a first op-amp unit; The eleventh resistor is connected with the third capacitor and the fourth capacitor, the other end of the third capacitor is connected with the thirteenth resistor and the first operational amplifier unit respectively, the other end of the fourth capacitor is connected with the thirteenth resistor and the second operational amplifier module respectively, and the twelfth resistor is connected with the first operational amplifier unit.
10. The ultrasonic spill-resistant sensor of claim 9, wherein the secondary op-amp module comprises a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a fifth capacitor, a sixth capacitor, and a second op-amp unit; One end of the fourteenth resistor and one end of the fifteenth resistor are simultaneously connected with one end of the fifth capacitor and one end of the sixth capacitor, and the other end of the fourteenth resistor is respectively connected with the thirteenth resistor, the first operational amplifier unit and the fourth capacitor; The other end of the fifth capacitor is connected with a sixteenth resistor and a second operational amplifier unit respectively, and the other end of the sixteenth resistor is connected with the second operational amplifier unit and a sixth capacitor.

Description

Ultrasonic anti-overflow sensor Technical Field The utility model relates to the technical field of sensors, in particular to an ultrasonic anti-overflow sensor. Background When the prior art needs to receive water, the operation of switching is generally needed to be performed manually, namely, an operation signal which can be used for outputting water or closing the water storage system is needed to be manually output, the water cup can not be identified, the water outlet is controlled or the water cup is closed, so that the water storage system is inconvenient in the actual use process, and the working efficiency is low. Disclosure of utility model The utility model aims to provide an ultrasonic anti-overflow sensor which solves the problem that a control signal is required to be output to a water storage system by human output in the prior art. The utility model is realized by the following technical scheme: The utility model provides an ultrasonic wave anti-overflow sensor, includes transmitting transducer, receiving transducer, drive circuit, amplification filter circuit, detection circuit, power module and MCU treater, drive circuit one end with transmitting transducer connects, the other end with the MCU treater is connected, receiving transducer with amplification filter circuit connects, amplification filter circuit is connected with detection circuit and MCU treater respectively, detection circuit's the other end with the MCU treater is connected, power module with drive circuit connects. Preferably, the MCU processor comprises an ADC module and a data processing module, and the ADC module is connected with the data processing module. Preferably, the amplifying and filtering circuit comprises a first-stage operational amplifier module and a second-stage operational amplifier module, wherein the input end of the first-stage operational amplifier module is connected with the receiving transducer, the output end of the first-stage operational amplifier module is connected with the input end of the second-stage operational amplifier module, and the output end of the second-stage operational amplifier module is respectively connected with the detection circuit and the ADC module. Preferably, the system further comprises a main control board and a power management module, wherein the main control board is connected with the power management module, the power management module is used for controlling power supply of the power module, and the main control board is connected with the data processing module through a communication interface. Preferably, the transmitting transducer comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first acquisition module and a second acquisition module; The first resistor is respectively connected with the third resistor and the MOS tube, the second resistor is respectively connected with the fourth resistor and the MOS tube, and the other ends of the third resistor and the fourth resistor are simultaneously connected with the MOS tube; The first acquisition module and the second acquisition module are respectively connected with the MOS tube. Preferably, the first acquisition module comprises a fifth resistor, a sixth resistor, a seventh resistor, a first crystal, a first diode, a second diode and a first transformer; The fifth resistor is connected with the first transformer, and two ends of the first crystal and the sixth resistor which are connected in parallel are connected with the first transformer; One end of the first diode and one end of the second diode which are connected in parallel are connected with the seventh resistor, the other end of the first diode is connected with the sixth resistor, and the other end of the seventh resistor is connected with the other end of the sixth resistor. Preferably, the second acquisition module comprises an eighth resistor, a ninth resistor, a tenth resistor, a second crystal, a third diode, a fourth diode and a second transformer; the eighth resistor is connected with the second transformer, and two ends of the second crystal and the ninth resistor which are connected in parallel are connected with the second transformer; One end of the third diode and one end of the fourth diode which are connected in parallel are connected with the tenth resistor, the other end of the third diode is connected with the ninth resistor, and the other end of the seventh resistor is connected with the other end of the sixth resistor. Preferably, the receiving transducer comprises a first electronic switch, a second electronic switch, a first capacitor and a second capacitor, the first collecting module is connected with the first capacitor, the other end of the first capacitor is connected with the first electronic switch, the second collecting module is connected with the second capacitor, the other end of the second capacitor is connected with the second electronic switch, and one end of the first electroni