CN106886057A - Portable water pipe freezes blocking position survey meter - Google Patents

Abstract

The invention discloses a water pipe freezing and blocking position detector, which includes: a micro control unit (MCU: Microcontroller Unit), which controls an ultrasonic transmitter to send an ultrasonic signal, and receives an electrical signal from an ultrasonic receiver to measure the passage of the ultrasonic wave. The time of the water pipe; the ultrasonic transmitter is arranged opposite to the ultrasonic receiver, leaving a distance between them; after receiving the control signal from the main control MCU, it sends out an ultrasonic pulse modulation signal; the ultrasonic receiver receives the ultrasonic signal and converts it into an electrical signal Send to the main control MCU; reminder module, when the time difference between the measured ultrasonic wave passing through the water pipe and the reference time exceeds the set value, the main control MCU sends a reminder message through the reminder module. The invention judges the degree of freezing and blockage of water pipes in different positions according to the difference in the time when ultrasonic waves pass through frozen and non-frozen water pipes. The shorter the time, the more serious the blockage. Send out a warning.

Description

Portable Water Pipe Frozen Blockage Position Detector

technical field

The invention belongs to the technical field of electronic circuits, and relates to a portable water pipe freezing blockage position detector, which mainly relates to high-frequency ultrasonic transmission and reception detection, micro control unit (MCU: Microcontroller Unit) control of ultrasonic transmission power, and calculation of receiving time and alarm reminder technology.

Background technique

In recent years, the global climate has changed greatly, resulting in frequent extreme weather. Even in winter in most parts of southern my country, the temperature is easy to drop below zero degrees Celsius. When the temperature is lower than zero, the water flow in the water pipe is very easy to freeze in a short period of time when the user does not use the water, resulting in a water stop, which brings great inconvenience to the normal production and life of the user.

Existing residential building water pipes are mostly made of polyvinyl chloride (PVC: Polyvinyl chloride) and high-density polyethylene (HDPE: High Density Polyethylene) materials, and are mostly installed in enclosed spaces or walls, with only a few parts exposed , and it is this exposed water pipe that is prone to freezing and freezing. When the above phenomenon occurs, residents often use hair dryers, electric heaters, etc. to heat the exposed water pipes section by section, and eventually the ice cubes in the frozen water pipes can be melted and the water supply can be restored. However, since it is impossible to see which section is frozen, the entire exposed water pipe needs to be heated, which is a lot of work, time-consuming and inefficient. Therefore, there is an urgent need to develop a method that can directly detect the water pipe from the outside without dismantling the water pipe, quickly find the frozen part of the water pipe, and then heat and melt the ice at the frozen position in a targeted manner, so as to quickly restore the water supply device of.

At present, the main technologies for detecting water pipe icing include optical icing sensors, British Lucas MK3 series icing detectors, magnetostrictive sensors, flat-mode resonant sensors, and piezoelectric resonant flat-film icing sensors. High, but the measurement range is small, it can only detect ice thickness 0~2.0mm. Thickness sensors that take advantage of the conductive properties of ice and water require full contact with the ice and are not practical either. Infrared thermal imaging cameras are expensive and rely on imported technology, and there are few domestic products in this area.

For places where water pipe antifreeze measures are not done well, especially in southern China, when extreme cold weather is encountered in winter, water pipes will freeze and block, affecting the normal use of users. If the freezing part of the water pipe can be quickly detected, corresponding measures can be taken according to the size of the freezing scale to restore the normal use of the user. The present invention proposes just based on this.

Contents of the invention

Aiming at the above-mentioned problems in the prior art, the present invention provides a portable water pipe freezing blockage position detector.

The present invention adopts the following technical solutions: a water pipe freezing blockage position detector, which includes:

The main control MCU controls the ultrasonic transmitter to send the ultrasonic signal and receives the electrical signal from the ultrasonic receiver to measure the time when the ultrasonic wave passes through the water pipe;

The ultrasonic transmitter is arranged opposite to the ultrasonic receiver, leaving a distance between them; after receiving the control signal from the main control MCU, it sends out an ultrasonic pulse modulation signal;

Ultrasonic receiver, which receives the ultrasonic signal and converts it into an electrical signal and sends it to the main control MCU;

A reminder module, when the time difference between the measured ultrasonic wave passing through the water pipe and the reference time exceeds the set value, the main control MCU sends a reminder message through the reminder module.

The invention judges the degree of freezing and blockage of water pipes in different positions according to the difference in the time for ultrasonic waves to pass through frozen and non-frozen water pipes. The shorter the time, the more serious the blockage. Send out a warning.

Preferably, the ultrasonic transmitter and the ultrasonic receiver are connected through a connecting device.

Preferably, the connecting device can adjust the distance between the ultrasonic transmitter and the ultrasonic receiver. The transmitter and receiver are fixed together, and the intermediate distance is adjustable, so that the distance between the transmitter and receiver remains constant during one measurement.

Preferably, the reminder module includes a buzzer, and when the difference between the measured ultrasonic wave passing through the water pipe and the reference time exceeds a set value, the buzzer will send out an alarm.

Preferably, it also includes a display connected with the main control MCU for displaying the time when the ultrasonic wave passes through the water pipe.

Preferably, the power of the ultrasonic wave is adjusted according to the diameter and/or material of the water pipe to be tested.

Adopt technical solution of the present invention, have following technical effect:

(1) High-frequency ultrasonic transmitter and receiver, the high-frequency ultrasonic pulse modulation signal sent by the transmitter is received by the receiver. The object interrupts the sound beam, causing the receiver to respond with an output signal. Users can adjust the magnification of the input signal according to their needs. When an object interrupts the sound beam, the receiver responds with an output signal.

(2) Through the potentiometer on the main control MCU, the user can adjust the magnification of the input signal according to the needs, and use the LED to indicate the status and signal strength of the output stage.

(3) Time the signal sent by the high-frequency ultrasonic transmitter to the time the ultrasonic signal is received by the receiver through the main control MCU. Continuously measure the time at different locations, and select the longest time as the benchmark.

(4) When the measured time is shorter than the reference time by a certain value, an alarm will be issued.

The invention can quickly detect some water pipes blocked by freezing, heat the frozen blocked parts in a targeted manner, and quickly solve the problem that users cannot use water.

Description of drawings

Fig. 1 is a schematic block diagram of the system structure of the present invention.

Fig. 2 is the working flowchart of the system of the present invention.

detailed description

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

The principle of the present invention is as follows: the power of ultrasonic waves is large, and the energy is much larger than that of ordinary sound waves, so the penetrating power is strong. Due to its high frequency, short wavelength, no serious diffraction, and good orientation. The propagation speed of ultrasonic waves in gas, liquid and solid increases sequentially, so the propagation speed of ultrasonic waves in flowing water is slower than that in frozen ice cubes, which shows that the transmission delay is greater, and the speed difference is more obvious. When the density difference between two objects is small, it is necessary to use the frequency of high-frequency ultrasonic waves to distinguish them. Because the density difference between ice and water is very small, high-frequency ultrasonic technology is chosen as the detection technology. At present, ultrasonic has been applied in metal flaw detection, ranging and medical treatment.

As shown in FIG. 1 , the main control MCU 2 is connected with a display 1 , a buzzer 3 , a high-frequency ultrasonic transmitter 4 , and a high-frequency ultrasonic receiver 7 . The high-frequency ultrasonic transmitter 4 and the high-frequency ultrasonic receiver 7 are relatively arranged on both sides of the water pipe 5, that is, the target to be detected. The high-frequency ultrasonic transmitter 4 generates a high-frequency ultrasonic wave 6 that passes through the water pipe 5 and is received by the high-frequency ultrasonic receiver 7. . And the high-frequency ultrasonic transmitter 4 is connected with the high-frequency ultrasonic receiver 7 by the connecting device 8, and the connecting device 8 is adjustable in length, which can avoid the gap between the high-frequency ultrasonic transmitter 4 and the high-frequency ultrasonic receiver 7 in the same measurement process. The error caused by the distance change.

The display 1 is used to display the time elapsed from the transmission to the reception of the ultrasonic wave, and can also be used to display the location information of the frozen water pipe. The main control MCU adopts the existing technology (such as: msp430f5529 single-chip microcomputer, 8051 series single-chip microcomputer, etc.), controls the ultrasonic transmitter to send high-frequency ultrasonic waves, receives signals transmitted by the ultrasonic receiver, and calculates the transmission time of high-frequency ultrasonic waves. Buzzer 3 is used for giving an alarm. The ultrasonic transmitter 4 sends high-frequency ultrasonic waves of a certain power. The ultrasonic receiver 7 converts the received high-frequency ultrasonic waves into electrical signals and sends them to the main control MCU.

As shown in Figure 2, the specific workflow is as follows:

(1) First press the start button of the main control MCU to choose whether to perform power adjustment. If yes, the main control MCU sends a signal to make the continuous signal sent by the ultrasonic transmitter be received by the receiver. The user adjusts the magnification of the input signal according to the actual pipe material and material radius, so that the ultrasonic transmitter transmits a high-frequency ultrasonic pulse signal with appropriate power when the high-frequency ultrasonic receiver can receive the signal.

(2) If you choose No, the detection will be carried out directly. The main control MCU sends a signal to make the ultrasonic transmitter send out a high-frequency ultrasonic pulse modulation signal. The high-frequency ultrasonic wave passes through the water pipe and is received by the receiver. The signal is converted into an electrical signal and sent to the main control MCU. The main control MCU calculates the time for the high-frequency ultrasonic wave to pass through the water pipe through a timing program, and displays it on the display.

(3) The propagation speed of high-frequency ultrasonic waves in water is much smaller than that in ice. Under the condition that the middle distance between the ultrasonic transmitter and the receiver is constant, measure multiple parts of the blocked water pipe, compare the measurement time several times, and select the longest time as the reference time, when the difference between the measured time and the reference time exceeds a certain value When the water pipe is blocked, the buzzer will send out an alarm, indicating that the water pipe is blocked, and the problem can be solved quickly by performing fixed-point heating according to the blockage situation.

The portable water pipe freezing and blocking position detector of the invention can quickly detect the blocking position of the water pipe due to freezing, and is especially suitable for exposed water pipes. The present invention can quickly judge whether the position is blocked by ice according to the difference in measurement time between the frozen part and the non-frozen part in the same water pipe, and sends out an alarm through a buzzer when it is frozen.

Claims (6)

1. A water pipe freezing blockage position detector is characterized in that it comprises: The main control MCU controls the ultrasonic transmitter to send out the ultrasonic signal, and receives the electrical signal from the ultrasonic receiver to measure the time for the ultrasonic wave to pass through the water pipe; The ultrasonic transmitter is arranged opposite to the ultrasonic receiver, leaving a distance between them; after receiving the control signal from the main control MCU, it sends out an ultrasonic pulse modulation signal; Ultrasonic receiver, which receives the ultrasonic signal and converts it into an electrical signal and sends it to the main control MCU; A reminder module, when the difference between the measured ultrasonic wave passing through the water pipe and the reference time exceeds the set value, the main control MCU sends a reminder through the reminder module. 2. The water pipe freezing blockage position detector according to claim 1, characterized in that: said ultrasonic transmitter and ultrasonic receiver are connected through a connecting device. 3. The water pipe freezing blockage position detector according to claim 2, characterized in that: said connection device can adjust the distance between the ultrasonic transmitter and the ultrasonic receiver. 4. The water pipe freezing and blocking position detector according to claim 1, wherein the reminder module includes a buzzer, and when the time difference between the measured ultrasonic wave passing through the water pipe and the reference time exceeds a set value, The buzzer sounds an alarm. 5. The water pipe freezing and blockage position detector according to claim 1, further comprising a display connected with the main control MCU for displaying the time when the ultrasonic wave passes through the water pipe. 6. The water pipe freezing and blockage position detector according to claim 1, characterized in that: the power of the ultrasonic wave is adjusted according to the diameter and/or material of the water pipe to be tested.