CN215921020U

CN215921020U - Handheld portable plastics detection device

Info

Publication number: CN215921020U
Application number: CN202122371414.3U
Authority: CN
Inventors: 岳钊; 秦君; 赵二刚; 金虎; 石聪
Original assignee: Nankai University
Current assignee: Nankai University
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-03-01
Anticipated expiration: 2031-09-29

Abstract

A handheld portable plastic detection device is formed based on the difference of light transmittance of two plastics of PET and HDPE on the wavelength of 1200nm of a near infrared spectrum. The infrared light source is arranged in the box body through a conductive bracket; be provided with near infrared sensor and integrated control system in the box of one side relative with near infrared light source, the top is the dog-house in the box, and the bottom is the discharge gate, is provided with the axis of rotation in the middle of the discharge gate, is fixed with in the axis of rotation to select separately to turn over the board, selects separately to turn over board both sides top and respectively is equipped with an electromagnetic switch, is equipped with weighing hook and weighing sensor below. According to the different transmission degrees of the two plastics to the infrared light with the wavelength of 1200nm, the material quality of the plastic sample is judged, and then the electromagnetic switch is triggered to drive the sorting turning plate to rotate, so that the plastics are conveyed to the corresponding discharge port. The device has compact structure, is portable and handheld, has extremely low power consumption under the power supply of a single power supply, and is suitable for distinguishing and collecting movable plastics.

Description

Handheld portable plastics detection device

Technical Field

The utility model relates to the field of waste plastic identification, in particular to a low-power-consumption, portable and low-cost food-grade plastic detection device.

Background

At present, the waste plastic treatment means in China mainly comprise methods of landfill, heat recovery, regeneration and recycling and the like. Firstly, plastics belong to substances which are not easy to naturally degrade, and the low landfill treatment efficiency can not meet the survival needs of human beings and can cause secondary pollution to the environment; secondly, the raw material of the plastic is derived from petroleum, and the excessive consumption of the plastic can also accelerate the consumption of petroleum resources. From the viewpoint of environmental protection and resource saving, the recycling of the waste plastics is more beneficial to the sustainable development of human beings.

Waste plastics are usually recycled in a mixture state, and because the properties of different types of plastics are greatly different, the quality of recycled plastic products is low if the waste plastics are directly recycled without classification.

Among all the waste plastics, the recovery ratio of food grade plastics is the largest. Among food grade plastics, PET and HDPE have become the main plastic materials, but the two plastics are similar in appearance and almost indistinguishable to the naked eye. Therefore, the classification and the recovery of the two plastics have higher practicability and considerable economic benefit.

At present, the two materials are distinguished mainly by methods such as electric separation, wind separation, photoelectric separation and the like. The requirements of electric sorting and wind sorting on the pretreatment and test environment of plastic samples are high, and the distinguishing difficulty is high. The photoelectric sorting method mainly relies on the near infrared spectrum transmission principle to distinguish samples, is an advanced method in the field of plastic classification at present, and has the characteristics of strong anti-interference performance, high online detection speed and the like.

The photoelectric plastic sorting machine on the market usually adopts continuous spectrum measurement, and multiple waste plastics are discerned simultaneously, and the continuous spectrum means that equipment needs to use a large amount of light sources and sensors, and is lower to the plastics degree of discerning of single material. The equipment also usually has sorting, cutting, conveying and other functions, even with a sorting box. Therefore, such a sorting machine usually has the disadvantages of large volume, heavy weight, high price, no pertinence in sorting plastics, and no universality in use environment.

For mobile plastic collection, the plastic is typically recycled and sold directly without sorting. Because of different plastic materials, the recycling price can also be different, and if the plastic is recycled in a mixed plastic mode, the recycling price is lower, and economic loss is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems in the prior art and provide the food-grade plastic sorting and detecting device which can obviously improve the sorting efficiency and has strong practicability and portability, low power consumption and low cost.

The technical scheme of the utility model is as follows:

a hand-held low-power-consumption portable plastic detection device mainly comprises a box body, wherein a handle and a power switch key are arranged on one side outside the box body, and a near-infrared light source electrically connected with the power switch key is arranged at a position in the box body, which corresponds to the handle, through a conductive support; a near-infrared sensor and an integrated control system are arranged in the box body on the side opposite to the near-infrared light source, a feed port is arranged at the upper part in the box body, a discharge port is arranged at the bottom in the box body, a rotating shaft is arranged in the middle of the discharge port, a sorting turning plate is fixed on the rotating shaft, electromagnetic switches are respectively arranged on the inner walls of the box body at the positions corresponding to the two sides of the sorting turning plate, and a weighing hook and a weighing sensor are respectively arranged on the box body below the sorting turning plate and on the two sides of the rotating shaft; the near-infrared sensor, the electromagnetic switch and the weighing sensor are respectively and electrically connected with the integrated control system.

The integrated control system comprises a main control module, a photoelectric detection module and a low-power Bluetooth control and communication module which are respectively connected with the main control module; the photoelectric detection module is connected with an external near-infrared sensor, the main control module is respectively connected with an external weighing sensor and an external electromagnetic switch, the low-power-consumption Bluetooth control and communication module is used for communicating with a mobile phone or an upper computer, and the integrated control system is powered by the low-power-consumption power module.

The sorting turning plate is made of ferromagnetic materials, and two sides of the sorting turning plate are magnetically connected with the two electromagnetic switches to keep the sorting turning plate in a balanced state; the integrated control system controls the single-side electromagnetic switch to be turned off according to the detection result of the plastic sample, so that the magnetic connection between the single-side electromagnetic switch and the sorting turning plate is disconnected, the sorting turning plate loses balance and turns to the side without the magnetic connection, and the plastic sample is sent to the discharge hole at the corresponding side; and then the single-side electromagnetic switch is controlled to be turned on to restore the magnetic connection between the electromagnetic switch and the sorting turning plate, so that the resetting of the sorting turning plate is ensured.

The discharge port is arranged at the bottom of the box body and comprises a PET discharge port and an HDPE discharge port which are respectively positioned at two sides of the rotating shaft, and the discharge ports are respectively provided with a pair of weighing lifting hooks; the weighing lifting hook is connected with a weighing sensor in the box body and used for hanging the collecting bag and weighing; and the weighing sensor is electrically connected with the integrated control system.

The identification device is arranged in the box body and comprises an integrated control system, an optical filter, a near-infrared light source and a near-infrared sensor; the filter cover is arranged on the top of the infrared sensor and surrounded by a special metal cylinder, so that the device does not need shading treatment when in work; the infrared sensor is electrically connected with the integrated control system; the near-infrared light source and the near-infrared sensor are respectively arranged on two sides of the feed opening.

The near-infrared light source adopts a single light source with the wavelength of 1200nm, and is used for ensuring the maximum transmittance difference of two plastics, so that the classification efficiency and the reliability are improved; the light-emitting diode with the wavelength of 1200nm can be used for replacing the light-emitting diode; the transmittance difference of the PET plastic and the HDPE plastic at the wavelength of 1200nm is the largest, which is beneficial to better distinguishing the two plastics; monochromatic light is used for replacing a continuous spectrum for detection, so that the plastic material can be distinguished more quickly and accurately; the light-emitting diode has small volume and low cost, and is beneficial to reducing the volume and the cost of the device.

The main control module is used for system resource allocation and data processing, and the system is automatically shut down and controlled under a long-time no-operation state; the photoelectric detection module is used for digitally processing the acquired data of the near-infrared sensor; the low-power-consumption Bluetooth control and communication module is responsible for transmitting the detection result and the weight information of the plastic sample to the mobile phone end for displaying, so that the loss of an indication panel to electric energy is saved, and the power consumption and the volume of the device are further reduced; the low-power-consumption power module is responsible for realizing distributed power supply to the detection device, and energy consumption is reduced to the greatest extent.

The integrated control system realizes low-power consumption design in the aspect of hardware; the method comprises the steps of adopting a low-power-consumption processor chip, a low-power-consumption Bluetooth communication technology, a low-power-consumption photoelectric detection device, a distributed power supply circuit design and the like.

The utility model has the advantages and beneficial effects that:

(1) the PET and HDPE plastics in the beverage bottle can be quickly and accurately distinguished, errors caused by manual operation are effectively avoided, the efficiency and reliability of plastic distinguishing are improved, and the subsequent plastic reprocessing process is saved.

(2) Can realize distinguishing automatically, collect and a series of operations such as weighing two kinds of plastics of PET and HDPE, simplify portable plastics and collect the apparatus, the user can directly retrieve the change sale to the plastics of collecting.

(3) The whole device has small volume, and the volume of the handle part is removed by about 0.2m³Left and right sides, portable can hand, is applicable to portable plastics and collects and classify. When in use, the shading treatment is not needed, and the utility model is suitable for various complex working environments.

Drawings

FIG. 1 is a schematic diagram of the apparatus of the present invention; in the figure: 1-a handle; 2-power switch key; 3-a feeding port; 4-an optical filter; 5-near infrared sensor; 6-an integrated control system; 7-a lithium battery; 8-a conductive support; 9-near infrared light source; 10-a box body; 11-sorting turning plate; 12-a rotating shaft; 13-a discharge hole; 14-an electromagnetic switch; 15-weighing hook; 16-load cell.

Fig. 2 is a block diagram of the integrated control system of the present invention. In the figure: (1) a near-infrared sensor; (2) a weighing sensor; (3) an integrated control system.

Detailed Description

Example 1:

the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be understood that the embodiments described herein are only for the purpose of illustrating the present invention and are not to be construed as limiting the present invention. These embodiments are provided so that this disclosure will be thorough and complete.

As shown in fig. 1, a hand-held portable plastic detection device. The infrared light source box comprises a box body 10, wherein a handle 1 and a power switch key 2 are arranged on one side outside the box body, and a near-infrared light source 9 electrically connected with the power switch key is arranged at a position in the box body corresponding to the handle through a conductive bracket 8; the light filter 4, the near-infrared sensor 5, the integrated control system 6 and the lithium battery 7 are sequentially arranged in the box body on the side opposite to the near-infrared light source, a feeding port 3 is arranged at the upper part in the box body, a discharging port 13 is arranged at the bottom part in the box body, a rotating shaft 12 is arranged in the middle of the discharging port, a sorting turning plate 11 is fixed on the rotating shaft, an electromagnetic switch 14 is respectively arranged on the inner wall of the box body at the position corresponding to the two sides of the sorting turning plate, and a weighing hook 15 and a weighing sensor 16 are respectively arranged on the box body below the sorting turning plate and positioned at the two sides of the rotating shaft; the near infrared sensor 5, the electromagnetic switch 14 and the weighing sensor 16 are respectively and electrically connected with the integrated control system 6.

The integrated control system 6 is shown in fig. 2, and comprises a main control module, and a photoelectric detection module and a low-power-consumption bluetooth control and communication module which are respectively connected with the main control module; the photoelectric detection module is connected with an external near-infrared sensor, the main control module is respectively connected with an external weighing sensor and an external electromagnetic switch, the low-power-consumption Bluetooth control and communication module is used for communicating with a mobile phone or an upper computer, and the integrated control system is powered by the low-power-consumption power module.

The detection process of the utility model is as follows:

(1) different sorting and collecting bags are hung on the weighing lifting hook respectively, so that the plastic samples can be conveniently received and weighed at the later stage. (2) After the power switch is turned on, the system automatically initializes and then waits for a detection command. (3) Open the bluetooth APP on the cell-phone and search for the bluetooth signal and be connected with this device. (4) Putting a plastic sample into the plastic sample feeding device from a feeding port, and pressing a power switch button to enable the identification device to enter a working state; the infrared light with the wavelength of 1200nm penetrates through the plastic sample to irradiate the photoelectric sensor, is converted into a voltage signal and is sent to the integrated control system, the integrated control system compares the voltage value with a preset threshold value, if the voltage value is larger (namely larger than the preset threshold value), the plastic is judged to be a PET material, and otherwise, the plastic is judged to be an HDPE material. (5) After the identification is completed, the integrated control system closes the electromagnetic switch on the corresponding side, and due to the disconnection of magnetic connection, the sorting turning plate is controlled to rotate to one side of the corresponding discharge port, a plastic sample is sent into the sorting collecting bag to be collected, at the moment, the data are sent to the integrated control system to complete weighing after the weight sensor senses the weight change, then the electromagnetic switch is opened, and the sorting turning plate is reset. (6) The main control module is used for arranging data, the Bluetooth module is used for sending information to the mobile phone, and the mobile phone can receive information such as a plastic detection result and sample weight immediately.

Claims

1. A hand-held portable plastic detection device is characterized by comprising a box body, wherein a handle and a power switch key are arranged on one side outside the box body, and a near-infrared light source electrically connected with the power switch key is arranged at a position in the box body, which corresponds to the handle, through a conductive bracket; a near-infrared sensor and an integrated control system are arranged in the box body on the side opposite to the near-infrared light source, a feed port is arranged at the upper part in the box body, a discharge port is arranged at the bottom in the box body, a rotating shaft is arranged in the middle of the discharge port, a sorting turning plate is fixed on the rotating shaft, electromagnetic switches are respectively arranged on the inner walls of the box body at the positions corresponding to the two sides of the sorting turning plate, and a weighing hook and a weighing sensor are respectively arranged on the box body below the sorting turning plate and on the two sides of the rotating shaft; the near-infrared sensor, the electromagnetic switch and the weighing sensor are respectively and electrically connected with the integrated control system.

2. The hand-held portable plastic detection device according to claim 1, wherein the sorting turning plate is made of ferromagnetic material, and both sides of the sorting turning plate are magnetically connected with the electromagnetic switch, so as to ensure that the sorting turning plate is in a balanced state; the integrated control system controls the single-side electromagnetic switch to be turned off according to the detection result of the plastic sample, so that the magnetic connection between the single-side electromagnetic switch and the sorting turning plate is disconnected, the sorting turning plate loses balance and turns to the side without the magnetic connection, and the plastic sample is sent to the discharge hole at the corresponding side; and then the single-side electromagnetic switch is controlled to be turned on to restore the magnetic connection between the electromagnetic switch and the sorting turning plate, so that the resetting of the sorting turning plate is ensured.

3. The hand-held portable plastic detection device as claimed in claim 1, wherein the top of the near infrared sensor is further installed with a filter, and the filter and the metal cylinder surround the near infrared sensor for eliminating interference of other light sources, so that the device does not need to be shaded during operation.

4. The hand-held portable plastic detection device according to claim 1, wherein the near infrared light source is a single light source with a wavelength of 1200nm, so as to ensure that the transmittance difference between the two plastics is maximized, thereby improving the classification efficiency and reliability.

5. The hand-held portable plastic detection device as claimed in claim 4, wherein the near infrared light source is replaced by a light emitting diode for stabilizing the wavelength and frequency of the light source and reducing cost and power consumption.

6. The hand-held portable plastic detection device according to any one of claims 1 to 5, wherein the integrated control system comprises a main control module, and a photoelectric detection module and a low power consumption Bluetooth control and communication module respectively connected with the main control module; the low-power-consumption Bluetooth control and communication module is used for communication with a mobile phone or an upper computer, and the integrated control system, the near-infrared sensor, the weighing sensor and the electromagnetic switch are powered by the low-power-consumption power supply module.

7. The hand-held portable plastic detection device as recited in claim 6, wherein the bluetooth low energy control and communication module uses bluetooth low energy technology, so that the device can transmit plastic material and weight information to the mobile phone end through bluetooth, thereby saving the power consumption of the indication panel and further reducing the power consumption and volume of the device.