CN111948146A - A rapid detection device for oil pollution in a short distance range - Google Patents

Abstract

The purpose of the present invention is to provide a quick detection device for oil pollution within a short distance, including a sensor base, a general support, and a branch support. , the front end of the sensor unit is provided with an infrared emitting tube and an infrared signal receiving tube. The invention solves the problem that the existing natural water body oil pollution detection method is insufficient, realizes a higher-speed oil pollution detection capability by reducing the detection requirements for the oil pollution concentration, and is applicable to a wide range of fields. For example, this system is placed at the bow of the unmanned cleaning vessel, and its rapid detection capability can be used to quickly detect water pollution in real time while the cleaning vessel is running, and put degraded substances or deploy them according to the detection results. Oil boom.

Description

A rapid detection device for oil pollution in a short distance range

technical field

The invention relates to a sewage oil pollution detection device, in particular to a marine oil pollution detection device.

Background technique

In recent years, the use of manual cleaning of marine oil pollution has consumed countless manpower and material resources. For the current oil pollution detection system, the cleaning ship cannot perform rapid real-time detection when it is moving rapidly. Oil pollution detection device.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a rapid detection device for oil pollution in a short distance range, which can realize the detection of oil pollution at a higher speed.

The object of the present invention is achieved in this way:

The invention is a quick detection device for oil pollution in a short distance range, which is characterized in that it includes a sensor base, a general support, and a branch support. , the front end of the sensor unit is provided with an infrared emitting tube and an infrared signal receiving tube.

The present invention can also include:

1. The angle between the infrared signal emission direction of the infrared emission tube and the normal to the water surface is 45°-70°.

2. Use the op amp to form a comparator circuit. According to the strength of the signal received by the infrared signal receiving tube, input an analog level related to the signal strength to the op amp, and compare it with the threshold level. When the relationship between the analog level and the threshold level changes, the output signal switches between high and low levels, thereby realizing the detection function.

3. The size of the threshold level is adjusted by the potentiometer, so as to adjust the threshold value of the sensor unit.

4. When the infrared signal of the infrared emission tube is irradiated to the oil, the received reflection signal will be enhanced compared to the water body. When the received reflection signal reaches the preset threshold, the output level of the sensor unit will increase from high to high. level transitions to a low level.

The advantages of the present invention are:

1. The infrared sensor is small in size and easy to install, increase or decrease the number, and arrange the order. The detection time is less than 5ms, which can be well adapted to high-speed cleaning ships and other devices. And the LM393 op amp used to form the comparator circuit has better anti-interference ability. The output signal is single, which is convenient for the MCU to perform logical operation processing, and can use a simple program to batch process multiple sets of data returned by the sensor array as the basis for determining the pollution detection results.

2. The main method of data processing is digital level logic operation, which is easy to set and flexibly adjust, and can set a variety of logic calculation expressions, which can be flexibly switched according to the actual situation when the system is working.

3. The branch bracket adopts an adjustable design, so that the number and arrangement of sensor units can be adjusted according to the actual situation, so that the sensor array has a good adjustable row, which can better adapt to the actual detection environment, achieve more accurate detection.

4. To solve the problem of insufficient oil pollution detection methods in existing natural water bodies, by reducing the detection requirements for oil pollution concentration, a higher-speed oil pollution detection capability is realized, which is applicable to a wide range of fields. For example, this system is placed at the bow of the unmanned cleaning vessel, and its rapid detection capability can be used to quickly detect water pollution in real time while the cleaning vessel is running, and put degraded substances or deploy them according to the detection results. Oil boom.

Description of drawings

Fig. 1 is the top view of the present invention;

Fig. 2 is the side view of the present invention;

FIG. 3 is a schematic structural diagram of the present invention.

Detailed ways

The present invention will be described in more detail below in conjunction with the accompanying drawings:

1-3 , a device for rapid detection of oil contamination in a short distance range of the present invention includes sensor unit A1 , sensor unit B2 , sensor unit C3 , branch support 4 , general support 5 , and sensor base 6 .

The sensor unit A1 , the sensor unit B2 , and the sensor unit C3 are installed on the top of the branch support 4 , and the actual number thereof is determined by the number of branches of the branch support 4 . Sensor unit A1, sensor unit B2, and sensor unit C3 are provided with an infrared emitting tube and an infrared signal receiving tube at the front end, and the angle between the infrared signal emission direction and the water surface normal is about 45°-70°.

The branch support 4 is used to fix the sensor unit A1, the sensor unit B2, and the sensor unit C3, and the number of the sensor units is determined according to the actual number of branches of the branch support 4. The figure only shows the case of three sensor units. The top end of the branch support 4 is connected to fix each sensor unit, and the bottom end of the branch support 4 is connected to the general support 5 . The upper end of the main support 5 is connected to the branch support 4 , and the lower end is connected to the sensor base 6 . The sensor base 6 is used for fixing the overall structure, and the upper end is connected to the general support 5 .

The sensor unit circuit is provided with an infrared emitting tube and an infrared signal receiving tube, a power supply wiring, and a signal output line. The infrared transmitting tube and the infrared signal receiving tube are respectively used for transmitting infrared signals and receiving reflected infrared signals. The power wiring is used to supply power to the module, and the signal output wire is used to output the sensor signal. The specific methods are as follows:

The overall circuit principle is to use the LM393 op amp to form a comparator circuit. According to the strength of the signal received by the infrared signal receiving tube, an analog level related to the signal strength is input to the op amp and compared with the threshold level. The size of the threshold level is adjusted by the potentiometer, so that the threshold value of the sensor unit circuit can be adjusted at any time. When the relationship between the analog level related to the signal strength and the threshold level changes, the output signal will switch between high and low levels accordingly, so as to realize the detection function.

The sensor unit uses an infrared emitting tube and a signal receiving circuit. When the infrared signal is irradiated to the oil, the received reflected signal will be significantly enhanced compared to the water. The signal receiving circuit sets a threshold through adjustment. When the received reflected signal reaches this threshold, the output level of the sensor unit will change from a high level to a low level.

The main control module uses a single-chip microcomputer to perform program logic operations, and takes the case where only three sensor units are included in the accompanying drawing as an example. The three sensor units The sensor unit A1, the sensor unit B2, and the sensor unit C3 will output three corresponding digital levels A, B, and C, and the three digital levels have only two logic values of 0 and 1. The following is an example of a system setting:

The sensor unit B2 located in the center is set as the main sensor unit, and the sensor unit A1 and sensor unit C3 located on both sides are auxiliary sensors, and it is stipulated that in the sensor array, when the main sensor unit B2 detects pollutants, and the auxiliary sensor unit sensor When at least one of unit A1 and sensor unit C3 detects contamination. It is determined that the sensor array has detected contamination. Which in turn has logical expressions:

OUT=A·(B+C)

According to the situation with three sensor units and the above logical expression, the comprehensive utilization of sensor unit A1, sensor unit B2, and sensor unit C3 can be realized, thereby effectively enhancing the detection accuracy of the sensor array, and enabling the detection signal to cover greater range.

Claims (5)

1. The utility model provides a greasy dirt short-distance within range short-term test device which characterized by: the sensor comprises a sensor base, a main support and a branch support, wherein the main support is connected above the sensor base, the branch support is arranged at the upper end part of the main support, a sensor unit is installed at the top end of the branch support, and an infrared transmitting tube and an infrared signal receiving tube are arranged at the front end of the sensor unit.

2. The quick oil stain detection device in the short distance range according to claim 1, which is characterized in that: the angle between the infrared signal transmitting direction of the infrared transmitting tube and the normal of the water surface is 45-70 degrees.

3. The quick oil stain detection device in the short distance range according to claim 2, which is characterized in that: the operational amplifier is used for forming a comparator circuit, an analog level related to the signal intensity is input into the operational amplifier according to the strength of a signal received by the infrared signal receiving tube and is compared with a threshold level, and when the magnitude relation between the analog level related to the signal intensity and the threshold level changes, an output signal is switched between a high level and a low level along with the analog level, so that the detection function is realized.

4. The quick oil stain detection device in the short distance range according to claim 3, which is characterized in that: the threshold level is adjusted by a potentiometer, so as to adjust the threshold value of the sensor unit.

5. The quick oil stain detection device in the short distance range according to claim 4, which is characterized in that: when the infrared signal of infrared transmitting tube shines the greasy dirt, compare and shine the water, received reflection signal can strengthen, and when received reflection signal reached preset threshold value, the level of sensor unit output was changed into the low level by the high level.

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