Infrared optical recognition device and method

Abstract

The present invention discloses an infrared optical recognition device and method, the device includes an optical detection mechanism and a microprocessor module, the optical detection mechanism has an optical element and an infrared transmitting and receiving module, the microcontroller module controls the infrared transmitting and receiving module to transmit an infrared light beam to the optical element, the infrared light beam is reflected and refracted by the optical element, and is received by the infrared transmitting and receiving module and converted into an electrical signal and transmitted to the microcontroller module, because the infrared light beam is partially refracted, the light amount of the infrared light beam received by the infrared receiving module changes, and finally the electrical signal also changes, and the microcontroller module determines whether the state of the object to be tested has changed according to the received electrical signal. The present invention can identify whether the state of the object to be tested has changed, and is suitable for the detection of abnormalities such as leakage in the production and transportation of hazardous chemicals.

Description

Technical Field

[0001] The invention relates to a liquid or fluid detection device, and in particular to an infrared optical recognition device and method. Background Art

[0002] With the rapid growth of my country's economy and the rapid development of the chemical industry, my country has become a major producer and user of chemical products. The types and quantities of hazardous chemicals are increasing day by day, and they are widely used in various fields of my country's economic development. However, in chemical production, organic liquid hazardous chemicals are prone to leakage, and the flammable, explosive or toxic and harmful gases they emit can cause major accidents such as fire, explosion, and poisoning. Therefore, it is necessary to detect whether organic liquid hazardous chemicals are leaking; in addition, during the transportation of organic liquid hazardous chemicals, the overflow of hazardous chemical transport tankers, the overflow of crane pipes on oil depots, or the leakage of gas stations will cause serious hazards and uncontrollability.

[0003] Therefore, it is necessary to provide a safe and reliable infrared optical recognition device that can be used to detect whether leakage and other abnormalities occur in the production and transportation of hazardous chemicals. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and to provide an infrared optical recognition device and method which can be used to detect whether leakage or other abnormalities occur in the process of production and transportation of hazardous chemicals.

[0005] To achieve the above object, the present invention proposes the following technical solution: an infrared optical recognition device, which includes an optical detection mechanism and a microcontroller module, wherein the optical detection mechanism includes

[0006] bearing base;

[0007] An infrared transmitting and receiving module is installed in the supporting base, and is used to transmit infrared light beams, receive infrared light beams and convert the received infrared light beams into electrical signals;

[0008] An optical element is sleeved on the bearing base, and the optical element is provided with an optical interface for reflecting and refracting the infrared light beam emitted by the infrared transmitting and receiving module, and guiding the infrared light beam to be received by the infrared transmitting and receiving module;

[0009] A protective sleeve, which is sleeved on the bearing base and is used to protect the infrared transmitting and receiving module;

[0010] The microcontroller module is connected to the infrared transmitting and receiving module, and is used to control the infrared transmitting and receiving module to transmit infrared light beams, receive the electrical signals, and determine whether the state of the object to be tested has changed according to the electrical signals.

[0011] Preferably, the optical interface causes the infrared light beam to be reflected and refracted at least once during the process of guiding the infrared light beam to be received by the infrared transmitting and receiving module.

[0012] Preferably, the optical element comprises an element body portion having an outer plane and an optical portion formed by extending outward from the outer plane, and the optical interface is formed on the optical portion.

[0013] Preferably, the element body portion is D-shaped, and the optical portion is triangular.

[0014] Preferably, the optical interface comprises a first reflecting surface and a second reflecting surface with an included angle of 60° to 120°.

[0015] Preferably, a press-fit cover for limiting the position of the optical element is further included, and the press-fit cover is sleeved on the bearing base and is located between the optical element and the protective sleeve.

[0016] Preferably, a first sealing ring is provided between the supporting base and the optical element, a second sealing ring is provided between the optical element and the pressing cover, and a third sealing ring is provided between the pressing cover and the protective sleeve.

[0017] Preferably, the optical element is made of a transparent material or a non-transparent material through which a portion of the infrared light beam can pass, and the material is compatible with the object to be measured.

[0018] Preferably, it also includes a signal conditioning circuit module for converting the electrical signal processed by the microcontroller module into an electrical signal that complies with the standard, and the signal conditioning circuit module is connected to the microcontroller module.

[0019] The present invention also discloses a recognition method of an infrared optical recognition device, comprising the following steps:

[0020] S100, placing the optical detection mechanism in the object to be tested, and the microcontroller module controls the infrared transmitting and receiving module to transmit an infrared beam to the optical element;

[0021] S200, an optical interface on the optical element causes the infrared light beam to be reflected and refracted, and guides the infrared light beam to be received by an infrared transmitting and receiving module;

[0022] S300, the infrared transmitting and receiving module converts the received infrared beam into an electrical signal and transmits it to the microcontroller module;

[0023] S400, receiving the electrical signal and determining whether the state of the object to be tested has changed according to the electrical signal.

[0024] The beneficial effects of the present invention are:

[0025] (1) The present invention controls the infrared transmitting and receiving module to transmit an infrared light beam to the optical element. After the infrared light beam is reflected and refracted by the optical element, it is received by the infrared transmitting and receiving module and converted into an electrical signal and transmitted to the microcontroller module. The microcontroller module processes the received electrical signal and determines whether the state of the object to be tested has changed. It can quickly identify the dry / wet state and identify oil / water, and is suitable for leakage detection in the production and transportation of hazardous chemicals.

[0026] (2) Each component of the optical detection mechanism of the present invention, such as the optical element, the press-fit cover, etc., is made of a material that is compatible with the object to be detected. At the same time, a sealing ring is used to seal each component, so that the optical detection mechanism can be immersed in the object to be detected that is compatible with the material for a long time for detection, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structural block diagram of the present invention;

[0028] Figure 2 is a three-dimensional schematic diagram of the optical detection mechanism of the present invention;

[0029] Figure 3 is an exploded schematic diagram of the optical detection mechanism of the present invention;

[0030] Figure 4 Schematic top view of the optical element of the present invention.

[0031] Figure numerals: 10, supporting base, 11, base body, 12, extension part, 20, infrared transmitting and receiving module, 30, optical element, 31, element body part, 311, outer plane, 312, outer arc surface, 32, optical part, 33, optical interface, 331, first reflecting surface, 332, second reflecting surface, 40, protective sleeve, 50, pressing cover, 60, first sealing ring, 70, second sealing ring, 80, third sealing ring. DETAILED DESCRIPTION

[0032] The technical solutions of the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention.

[0033] The infrared optical identification device disclosed in the present invention controls the infrared transmitting and receiving module 20 to transmit an infrared light beam to the optical element 30 through a microcontroller module. The infrared light beam is reflected and refracted by the optical element 30, received by the infrared transmitting and receiving module 20 and converted into an electrical signal for transmission to the microcontroller module. The microcontroller module processes the received electrical signal and determines whether the state of the object to be tested has changed. It can quickly identify the dry / wet state and identify oil / water, and is suitable for leakage detection in the production and transportation of hazardous chemicals.

[0034] Combination Figure 1 to Figure 3As shown, an infrared optical recognition device disclosed by the present invention includes an optical detection mechanism and a microcontroller module. The optical detection mechanism includes a bearing base 10, an infrared transmitting and receiving module 20, an optical element 30 and a protective sleeve 40. The bearing base 10 is used to install the infrared transmitting and receiving module 20, the optical element 30 and the protective sleeve 40, and includes a base body 11 and an extension portion 12 formed by extending outward from the base body 11; the infrared transmitting and receiving module 20 is mounted on the extension portion 12 by means including but not limited to fastening bolts, and is used to emit infrared light beams, receive infrared light beams and convert the received infrared light beams into electrical signals; the optical element 30 is sleeved on the extension portion 12, and is provided with an optical interface 33 for reflecting and refracting the infrared light beam emitted by the infrared transmitting and receiving module 20, and guiding the infrared light beam to be received by the infrared transmitting and receiving module 20; the protective sleeve 40 is sleeved on the extension portion 12, and is used to protect the infrared transmitting and receiving module 20 and the cable connected to the infrared transmitting and receiving module 20.

[0035] The microcontroller module is connected to the infrared transmitting and receiving module 20 by wire or wireless means, and is used to control the infrared transmitting and receiving module 20 to emit infrared beams, and receive the electrical signals converted by the infrared transmitting and receiving module 20 and determine whether the state of the object to be tested has changed according to the electrical signals.

[0036] In this embodiment, the infrared transmitting and receiving module 20 includes an infrared transmitting module (not shown) and an infrared receiving module (not shown), wherein the infrared transmitting module is connected to the microcontroller module, and transmits an infrared beam to the optical element 30 under the control of the microcontroller module; the infrared receiving module is connected to the microcontroller module, and is used to receive the infrared beam and convert the infrared beam into an electrical signal and transmit it to the microcontroller module. In this embodiment, the infrared transmitting module and the infrared receiving module are integrated into the printed circuit board and then assembled on the extension part 12, which can effectively reduce the volume of the infrared optical recognition device.

[0037] Combination Figure 3 and Figure 4As shown, the optical element 30 can be made of different materials according to the application environment and the contact medium, and the materials used are compatible with the object to be measured. In this embodiment, the optical element 30 is made of transparent material. Of course, in other embodiments, non-transparent materials that can partially transmit infrared light beams can also be used. Further, in this embodiment, the optical interface 33 on the optical element 30 causes the infrared light beam to be reflected and refracted twice in the process of guiding the infrared light beam to be received by the infrared transmitting and receiving module 20. Specifically, the optical element 30 includes a D-shaped element body 31 and a triangular optical part 32, the element body 31 has a connected outer plane 311 and an outer arc surface 312, the optical part 32 is arranged on the outer plane 311 of the element body 31, and the optical interface 33 is formed on the optical part 32. The optical interface 33 includes a first reflection surface 331 and a second reflection surface 332, wherein the angle between the first reflection surface 331 and the second reflection surface 332 is 60° to 120°, and the angle between the two is 90°, which is the best in specific implementation. The first reflection surface 331 and the second reflection surface 332 are both used to reflect and refract the infrared light beam, and the first reflection surface 331 and the second reflection surface 332 being in different media will change the amount of light refracted by the infrared light beam, such as increasing or decreasing the amount of light refracted.

[0038] Furthermore, in order to prevent the position of the optical element 30 from shifting so that the path of the infrared light beam is affected, the infrared optical identification device also includes a pressing cover 50, which is sleeved on the extension portion 12 and is located between the optical element 30 and the protective sleeve 40, for limiting the position of the optical element 30.

[0039] Furthermore, in order to prevent the object to be tested from entering the optical detection mechanism through the gap between the base body 11 and the optical element 30, and the gap between the optical element 30 and the press-fit cover 50 to affect or damage the optical element 30 and the infrared transmitting and receiving module 20, the base body 11 and the optical element 30 are provided with a first sealing ring 60, and a second sealing ring 70 is provided between the optical element 30 and the press-fit cover 50. Specifically, the end surface of the base body 11 in contact with the optical element 30 is recessed inward to form a first clearance groove, and the first sealing ring 60 is arranged in the first clearance groove, and finally the sealing between the base body 11 and the optical element 30 is achieved; the end surface of the press-fit cover 50 in contact with the optical element 30 is recessed inward to form a second clearance groove, and the second sealing ring 70 is arranged in the second clearance groove, and finally the sealing between the optical element 30 and the press-fit cover 50 is achieved. In this embodiment, the first sealing ring 60 and the second sealing ring 70 are both D-shaped.

[0040] like Figure 1As shown, the protective sleeve 40 is a cylindrical pipe structure, and an internal thread is provided on the inner wall of the end connected to the supporting base 10, and an external thread matching the internal thread is provided on the outer wall of the extension portion 12. The protective sleeve 40 is connected to the supporting base 10 by matching the internal thread and the external thread. Of course, in other embodiments, the protective sleeve 40 and the supporting base 10 can also be connected by other methods, such as a snap-on connection.

[0041] Furthermore, in order to prevent the object to be tested from entering the interior of the optical detection mechanism through the gap between the protective sleeve 40 and the press-fit cover 50, thereby affecting or damaging the infrared transmitting and receiving module 20 and the optical element 30, a third sealing ring 80 is provided between the protective sleeve 40 and the press-fit cover 50. Specifically, the end surface of the protective sleeve 40 in contact with the press-fit cover 50 is recessed inward to form a third clearance groove, and the third sealing ring 80 is arranged in the third clearance groove, and finally the sealing between the protective sleeve 40 and the press-fit cover 50 is achieved. In this embodiment, the third sealing ring 80 is O-shaped.

[0042] In order to make the final output data meet the relevant standards, such as API (American Petroleum Institute) standards (American standards) or EN regulations (European standards), the infrared optical recognition device also includes a signal conditioning circuit module, which is connected to the microprocessor control module and is used to convert the electrical signal processed by the microcontroller module into an electrical signal that meets the standards. Specifically, the signal conditioning circuit module includes an amplifying circuit module, a differential circuit module and an integral circuit module. The amplifying circuit module is used to amplify the signal, and the differential circuit module and the integral circuit module are used for signal detection, processing and conversion.

[0043] Furthermore, the infrared optical recognition device also includes a communication circuit module, which is connected to the microcontroller module and is used to convert the electrical signal processed by the microcontroller module into a signal that complies with a communication protocol, such as a CAN communication protocol, a serial port (RS232 / 485) communication protocol, or a TCP / IP communication protocol.

[0044] The working principle of the infrared optical recognition device described in the present invention is as follows:

[0045] The optical detection mechanism is placed in the object to be tested, and the microcontroller module controls the infrared transmitting module to transmit an infrared beam to the optical element 30. After the infrared beam is reflected and refracted twice by the optical interface 33, a part of the infrared beam is refracted out of the optical element 30, and the remaining infrared beam is received by the infrared receiving module after two reflections. The infrared receiving module converts the received infrared beam into an electrical signal and transmits it to the microcontroller module. Since the optical element 30 exists in the object to be tested, its optical interface 33 changes, resulting in a change in the amount of light of the refracted infrared beam, thereby causing a change in the amount of light of the infrared beam received by the infrared receiving module, and finally causing a change in the electrical signal output by the infrared receiving module to the microcontroller module. The microcontroller module processes the received electrical signal and determines whether the state of the object to be tested has changed.

[0046] At the same time, the microcontroller module converts the processed electrical signal into data that complies with relevant standards through the signal conditioning circuit module or converts it into data that complies with relevant communication protocols through the communication circuit module and sends the corresponding data, such as sending the data to a host computer or an intelligent terminal, to realize the measurement and control function.

[0047] The infrared optical recognition device described in the present invention, on the one hand, reflects and refracts the infrared light beam through the optical element 30, so that the light amount of the infrared light beam changes, and then detects whether the state of the object to be tested has changed according to the light amount of the infrared light beam. It has a simple structure and is easy and safe to operate. On the other hand, it also outputs detection data that meets relevant standards through a signal conditioning circuit, which meets the safety specifications in the field of hazardous chemicals.

[0048] In addition, the optical detection mechanism of the present invention adopts the above-mentioned sealing structure, which allows it to be immersed in the object to be tested for a long time, and has the advantage of long service life. At the same time, each component in the optical detection mechanism of the present invention is made of materials compatible with the object to be tested, and can be immersed in the object to be tested that is compatible with the material for a long time. When the object to be tested is incompatible with the material used by the component, the material of the corresponding component can be changed to a material compatible with the object to be tested to achieve compatibility, such as changing aluminum to stainless steel, and ordinary rubber to special rubber, to adapt to the object to be tested (such as corrosive liquids, etc.).

[0049] The technical contents and technical features of the present invention have been disclosed as above. However, those skilled in the art may still make various substitutions and modifications based on the teachings and disclosures of the present invention without departing from the spirit of the present invention. Therefore, the protection scope of the present invention should not be limited to the contents disclosed in the embodiments, but should include various substitutions and modifications that do not depart from the present invention and are covered by the claims of this patent application.

Claims

1. An infrared optical recognition device, characterized in that: It includes an optical detection mechanism and a microcontroller module, wherein the optical detection mechanism includes: bearing base; An infrared transmitting and receiving module, installed in the supporting base and comprising an infrared transmitting module and an infrared receiving module integrated in a printed circuit board, for transmitting an infrared light beam, receiving an infrared light beam and converting the received infrared light beam into an electrical signal; An optical element is sleeved on the bearing base, and an optical interface is provided on the optical element to reflect and refract the infrared light beam emitted by the infrared transmitting and receiving module, and guide the infrared light beam to be received by the infrared transmitting and receiving module. The optical element includes an element body portion having an outer plane and an optical portion formed by extending outward from the outer plane, and the optical interface is formed on the optical portion. The optical interface includes a first reflection surface and a second reflection surface with an included angle of 60° to 120°. The element body portion is D-shaped, and the optical portion is triangular; A protective sleeve, which is sleeved on the bearing base and is used to protect the infrared transmitting and receiving module; The microcontroller module is connected to the infrared transmitting and receiving module, and is used to control the infrared transmitting and receiving module to transmit infrared light beams, receive the electrical signals, and determine whether the state of the object to be tested has changed according to the electrical signals.

2. The infrared optical recognition device according to claim 1, characterized in that: The optical interface causes the infrared light beam to be reflected and refracted at least once during the process of guiding the infrared light beam to be received by the infrared transmitting and receiving module.

3. The infrared optical recognition device according to claim 1, characterized in that: It also includes a pressing cover for limiting the position of the optical element. The pressing cover is sleeved on the bearing base and is located between the optical element and the protective sleeve.

4. The infrared optical recognition device according to claim 3, characterized in that: A first sealing ring is arranged between the bearing base and the optical element, a second sealing ring is arranged between the optical element and the pressing cover, and a third sealing ring is arranged between the pressing cover and the protective sleeve.

5. The infrared optical recognition device according to claim 1, characterized in that: The optical element is made of a transparent material or a non-transparent material through which a part of the infrared light beam can pass, and the material is compatible with the object to be measured.

6. The infrared optical recognition device according to claim 1, characterized in that: It also includes a signal conditioning circuit module for converting the electrical signal processed by the microcontroller module into an electrical signal that complies with the standard, and the signal conditioning circuit module is connected to the microcontroller module.

7. A recognition method based on the infrared optical recognition device according to claim 1, characterized in that: The steps include: S100, placing the optical detection mechanism in the object to be tested, and the microcontroller module controls the infrared transmitting and receiving module to transmit an infrared beam to the optical element; S200, an optical interface on the optical element causes the infrared light beam to be reflected and refracted, and guides the infrared light beam to be received by an infrared transmitting and receiving module; S300, the infrared transmitting and receiving module converts the received infrared beam into an electrical signal and transmits it to the microcontroller module; S400, receiving the electrical signal and determining whether the state of the object to be tested has changed according to the electrical signal.

Images