CN217359603U

CN217359603U - Probe type liquid concentration measuring device

Info

Publication number: CN217359603U
Application number: CN202221264481.3U
Authority: CN
Inventors: 马玉峰; 徐凯; 胡朋飞; 马玉国
Original assignee: Beijing Linghang Lijia Electromechanical Co ltd
Current assignee: Beijing Linghang Lijia Electromechanical Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-09-02
Anticipated expiration: 2032-05-24

Abstract

The application relates to a probe-type liquid concentration measuring device, including: the probe comprises a probe shell, a light source, a prism, a lens group, a reticle and an image sensor, wherein the probe shell is of a hollow structure, the inside of the probe shell is provided with an accommodating cavity, and the top end of the probe shell is provided with a measuring channel. Prism, battery of lens and reticle set gradually from the top of probe casing to the end of probe casing, and the top of prism is the inclined plane, and the passway mouth at the measurement passageway is obeyed in the subsides of inclined plane, and the refracting index (nD) of prism is in 1.9 ~ 2.1 interval, and the light source setting is in the below of prism, and is corresponding with the measurement passageway normal phase, and image sensor sets up the end at the probe casing for the formation of image on the transmission reticle. In the whole using process, the top end of the measuring device is placed into the liquid to be measured, the imaging on the reticle can be directly measured without taking out the measuring device, and the measuring result is calculated through an image analysis algorithm. The operation is quick and simple, and liquid taking is not needed, so that the liquid is safer when the measured liquid is highly corrosive or highly polluting.

Description

Probe type liquid concentration measuring device

Technical Field

The application relates to the technical field of liquid concentration detection, in particular to a probe type liquid concentration measuring device.

Background

The working principle of the refractometer is based on total internal reflection, when light passes through liquids with different concentrations, different refractive indexes are generated, and the concentration value of the liquid is obtained by comparing the refractive indexes. At present, most of traditional refractometer products adopt a 'liquid taking' mode for measurement, liquid to be measured needs to be taken by a dropper or a pipettor, and the operation is inconvenient. In the liquid taking process, if the liquid to be measured has strong pollution or strong corrosivity, incomplete hidden dangers exist in the liquid taking process or the measuring process, and the safety is low. Therefore, how to measure the concentration value of the liquid to be measured quickly and safely becomes an urgent problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the application provides a probe-type liquid concentration measurement device, has solved the loaded down with trivial details problem of liquid process of getting.

According to an aspect of the present application, there is provided a probe-type liquid concentration measuring apparatus including: the device comprises a probe shell, a prism group, a lens, a reticle and an image sensor; the probe shell is hollow and cylindrical and is of a sealing structure, the top end of the interior of the probe shell is obliquely arranged, and a measuring channel is formed in the probe shell; the prism, the lens group, the reticle and the image sensor are sequentially arranged from the top end of the probe shell to the tail end of the probe shell; the top end of the prism is obliquely arranged and is attached to the measuring channel; the inclination angle of the top end of the prism is 45 degrees, and the prism is matched with the top end of the interior of the probe shell; the refractive index of the prism is within 1.9-2.1.

In one possible implementation, the inclined angle of the inclined plane is 40-50 degrees; the refractive index of the prism material is as follows: 1.9-2.1; the whole prism is of a square structure; and the side wall of the top end and the side wall of the rear end of the prism are both optical surfaces, the side wall of the top end of the prism is a measuring surface, the side wall of the rear end of the prism is an emergent surface, and the side wall of the prism is a matte surface.

In one possible implementation, the inside wall diameter of the probe housing is within the interval of 4mm-10 mm.

In one possible implementation manner, the liquid concentration measuring device further comprises a circuit board and a temperature sensing device; the circuit board is arranged at the top end of the interior of the probe shell and is bonded on the inner side wall of the probe shell; the temperature sensing device and the light source are welded on the circuit board and electrically connected with the circuit board on the image sensor.

In one possible implementation, the light source emits emission light perpendicular to the body length direction of the prism; the wavelength of the emitted light is within the range of 559-519nm, and the emitted light adopts an LED light source.

In one possible implementation manner, one lens group is provided, and comprises a first lens, and the first lens is of an aspheric structure; the incidence surface of the first lens is an aspherical mirror; the emergent surface of the first lens is an aspherical mirror; the reticle is disposed at a focal plane position of the first lens.

In one possible implementation manner, the lens group is provided with three, including a second lens, a third lens and a fourth lens; the second lens and the fourth lens are both aspheric structures, one surface of each second lens is a plane mirror, and the other surface of each second lens is an aspheric mirror; one surface of the third lens is a concave mirror, and the other surface of the third lens is also a concave mirror; the second lens, the third lens and the fourth lens are sequentially arranged, and the axes of the second lens, the third lens and the fourth lens are coaxially arranged; the reticle is disposed at a focal plane position of the lens group.

In one possible implementation manner, the liquid concentration measurement device further comprises a light path body; the light path body is bonded on the inner side wall of the probe shell; the probe shell is provided with an installation groove at the top end inside, and the top end of the light path body extends to form an installation part which is embedded in the installation groove; the prism and the lens group are both arranged on the light path body.

In one possible implementation, the image sensor includes a camera and a data cable; the camera is arranged at the rear end of the interior of the probe shell and is bonded on the inner side wall of the probe shell; the data cable penetrates through the rear end of the probe shell to the inside of the probe shell, is electrically connected with the camera, the light source and the temperature sensing device and is used for transmitting image data, temperature data and light source control instructions.

In one possible implementation, the prism, the lens group, the reticle, and the axis of the image sensor are coaxially disposed.

The probe type liquid concentration measuring device has the advantages that: the prism and the lens combination reticle are sequentially integrated inside the probe shell to be used as an optical measuring device. The top end of the probe shell is provided with a measuring channel, and the measuring channel is attached to the prism and serves as a channel for measuring the concentration value of the liquid. The light source is arranged below the prism, corresponds to the upper and lower positive phases of the channel opening of the measuring channel above the light source, and provides light for the liquid and the prism in the refraction process. An image sensor is arranged between the tail end of the probe shell and the reticle and used for transmitting images on the reticle and carrying out image analysis processing operation to obtain a concentration value of the liquid to be detected. In the use process, the top end of the measuring device is inserted into the liquid to be measured, and the liquid to be measured enters the measuring channel at the top end and is in direct contact with the measuring surface of the prism. A light source is arranged below the prism, and incident light entering the prism is emitted by the light source vertically corresponding to the channel port, refracted by the liquid and transmitted to the reticle through the lens group. The image sensor at the rear side of the reticle transmits the image, and the concentration value of the liquid can be obtained through image analysis, processing and operation. In the whole using process, the top end of the measuring device is placed into the liquid to be measured, and the imaging on the reticle can be directly measured without being taken out. The operation is fast and simple, and liquid taking is not needed, so that the liquid is safer when the measured liquid is highly corrosive or highly polluting.

Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a main body of a probe-type liquid concentration measurement device according to an embodiment of the present application;

fig. 2 is a diagram showing an optical system of a probe-type liquid concentration measuring apparatus according to an embodiment of the present application;

fig. 3 is a partially enlarged view showing a main structure of a probe-type liquid concentration measuring apparatus according to an embodiment of the present application;

fig. 4 is a diagram showing an effect of embodiment 1 of the probe-type liquid concentration measuring apparatus according to the embodiment of the present application;

fig. 5 is a diagram showing an effect of embodiment 2 of the probe-type liquid concentration measuring apparatus according to the embodiment of the present application;

fig. 6 is a diagram showing an effect of embodiment 3 of the probe-type liquid concentration measurement device according to the embodiment of the present application.

Detailed Description

Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention or for simplicity in description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.

Fig. 1 shows a schematic view of a body structure according to an embodiment of the present application. As shown in fig. 1, the probe-type liquid concentration measuring apparatus according to the embodiment of the present application includes: the probe comprises a probe shell 100, a light source 800, a prism 200, a lens group 300, a reticle 400 and an image sensor, wherein the probe shell 100 is a hollow structure with an accommodating chamber arranged inside, and the top end of the probe shell is provided with a measuring channel 110. The prism 200, the lens group 300 and the reticle 400 are sequentially arranged from the top end of the probe housing 100 to the tail end of the probe housing 100, the top end of the prism 200 is an inclined surface, the inclined surface is attached to a channel port of the measuring channel 110, the refractive index (nD) of the prism 200 is within a range of 1.9-2.1, the light source 800 is arranged below the prism 200 and corresponds to the positive phase of the measuring channel 110, and the image sensor is arranged at the tail end of the probe housing 100 and used for transmitting images on the reticle 400.

In this embodiment, referring to fig. 2, fig. 2 is an optical system diagram of a probe-type liquid concentration measuring apparatus according to an embodiment of the present application, in which a prism and a lens combination reticle are sequentially integrated inside a probe housing as an optical measuring apparatus. The top end of the probe shell is provided with a measuring channel, and the measuring channel is attached to the prism and serves as a channel for measuring the concentration value of the liquid. The light source is arranged below the prism, corresponds to the upper and lower positive phases of the channel opening of the measuring channel above the light source, and provides light for the liquid and the prism in the refraction and total reflection processes. An image sensor is arranged between the tail end of the probe shell and the reticle and used for transmitting images on the reticle and carrying out image analysis processing operation to obtain a concentration value of the liquid to be detected. In the use process, the top end of the measuring device is inserted into the liquid to be measured, and the liquid to be measured enters the measuring channel at the top end and is in direct contact with the measuring surface of the prism. A light source is arranged below the prism, and the light source vertically corresponding to the channel port emits incident light entering the prism, and the incident light and the measuring surface are subjected to total refraction and reach the reticle through a lens group. The image sensor at the rear side of the reticle transmits the image to obtain the concentration value of the liquid. In the whole using process, the top end of the measuring device is placed into the liquid to be measured, and the imaging on the reticle can be directly measured without being taken out. The operation is fast and simple, and liquid taking is not needed, so that the liquid is safer when the measured liquid is highly corrosive or highly polluting.

In one embodiment, the prisms have a slope angle in the range of 40-50 degrees. In the whole production and manufacturing process of the product, particularly when the inclined plane of the prism is cut into 45 degrees, the difficulty in manufacturing and assembling the product is the lowest, and the assembling error is the lowest. When the inclined plane inclination angle of the prism is 45 degrees, in order to make the incident light reflected by the optical surface of the prism at the channel opening hit the reticle in a minimum incident angle symmetrical mode, the material model is adopted

The glass prism of (2) is,the incident light is made to strike the reticle, so that the image on the reticle is clearer, and the obtained liquid concentration value is more accurate.

According to the optical total reflection principle, when the incident light is smaller than the total reflection critical angle, the incident light is refracted and exits the prism 200; when the incident angle is greater than the critical angle of total reflection, the incident light is totally reflected and continues to propagate inside the prism 200. The calculation formula of the critical angle of total reflection is as follows: sin c/sin90 degree (n 2/n 1), wherein c is the critical angle of total reflection. n1 is known as the index of refraction (nD) of prism 200. n2 is the refractive index (nD) of the liquid being measured.

Further, when the liquid refractive index (nD) measurement range of the probe refractometer is set as: 1.32-1.52. Namely, the lower limit refractive index (nD) is 1.32 and the upper limit refractive index (nD) is 1.52. According to the formula sin c/sin90 ═ n2/n1, the critical angle for measuring total reflection of liquids with different refractive indexes can be calculated, and refer to fig. 3: the critical angle for total reflection for a low refractive index (nD) (1.32) liquid is: a; the critical angle for total reflection for medium refractive index (nD) (1.42) liquids is: b; the critical angle for total reflection for a high refractive index (nD) (1.52) liquid is: c.

example 1

Referring to fig. 4 and 4, fig. 4 shows an effect diagram of embodiment 1 of the probe-type liquid concentration measuring device according to the embodiment of the present invention, when the refractive index (nD) of the measured liquid is 1.32, light equal to the critical angle a of total reflection is totally reflected in the diffusely scattered light beam to generate a light beam U, and is totally reflected by the material surface of the prism 200, light greater than the critical angle a of total reflection is also totally reflected to generate a light beam with a light beam angle greater than U, and is totally reflected by the material surface of the prism 200. These light beams are focused by the lens assembly 300 and projected onto the reticle 400, forming a bright area on the reticle 400.

When the refractive index (nD) of the measured liquid is 1.32, the light rays smaller than the critical angle a of total reflection in the diffusely scattered light beam are refracted and exit the measuring surface of the prism 200, and a dark region is formed at a corresponding position on the reticle 400. It should be noted here that the effect simulated by the optical tracking software is the same.

Example 2

Referring to fig. 5 and 5, fig. 5 shows an effect diagram of embodiment 2 of the probe-type liquid concentration measuring device according to the embodiment of the present invention, when the refractive index (nD) of the measured liquid is 1.42, light equal to the critical angle b of total reflection is totally reflected in the diffusely scattered light beam to generate a light beam V, and is totally reflected by the measuring surface of the prism 200, light greater than the critical angle a of total reflection is also totally reflected to generate a light beam with a light beam angle greater than V, and is totally reflected by the measuring surface of the prism 200. These light beams are focused by the lens assembly 300 and projected onto the reticle 400, forming a bright area on the reticle 400.

When the refractive index (nD) of the measured liquid is 1.42, the light rays smaller than the critical angle b of total reflection in the diffusely scattered light beam are refracted and exit the measuring surface of the prism 200, and a dark area is formed at a corresponding position on the reticle 400. It should be noted here that the effect simulated by the optical tracking software is the same.

Example 3

Referring to fig. 6 and 6, fig. 6 shows an effect diagram of embodiment 3 of the probe-type liquid concentration measuring device according to the embodiment of the present invention, when the refractive index (nD) of the measured liquid is 1.52, light equal to the critical angle c of total reflection in the diffusely scattered light is totally reflected to generate a light beam W, and is totally reflected by the measuring surface of the prism 200, light greater than the critical angle c of total reflection is also totally reflected to generate a light beam with a light beam angle greater than W, and is totally reflected by the measuring surface of the prism 200. These light beams are focused by the lens assembly 300 and projected onto the reticle 400, forming a bright area on the reticle 400.

When the refractive index (nD) of the measured liquid is 1.52, the light rays smaller than the critical angle c of total reflection in the diffusely scattered light beam are refracted and exit the measuring surface of the prism 200, and a dark area is formed at a corresponding position on the reticle 400. It should be noted here that the same effect is simulated by optical tracing software, which is a conventional means in the art for measuring the concentration value of a liquid.

In summary, after the camera 500 captures a clear image on the reticle 400, the image processing software algorithm can accurately calculate the position of the bright-dark cut-off in the image, which represents the size of the critical angle of total reflection of the measured liquid, and further calculate the refractive index of the measured liquid by the calculation formula of the critical angle of total reflection, and the temperature compensation of the measured liquid by the participation of the temperature sensing device can calculate the corresponding liquid concentration value. It should be noted here that the method for obtaining the corresponding liquid concentration value by using the temperature sensing device and the calculated liquid refractive index is a conventional technical means in the art.

In a specific embodiment, the prism 200 has a square structure as a whole, and the bottom end of the prism 200 has a 3mm × 3mm square structure, so that the square prism 200 is convenient to cut and produce, and the production and manufacturing costs are reduced compared with the prism 200 having a cylindrical structure. In addition, the prism 200 having a square structure is easily installed and fixed inside the probe housing 100.

Further, in this embodiment, the top side wall and the rear side wall of the prism 200 are both optical surfaces, wherein the top side wall (inclined surface) is a measurement surface, the rear side wall is an exit surface, and the side wall of the prism 200 is a matte surface (material surface). The side wall of the prism 200 adopts a matte structure, so that incident light emitted by the light source 800 passes through the matte of the prism 200 to form a uniform diffuse scattering light beam in the prism 200, and the uniform diffuse scattering light beam is transmitted to the top side wall measuring surface of the prism 200. The top side wall of the prism 200 is a surface directly contacting with the measurement channel 110, i.e. the liquid to be detected. The rear end side wall of the prism 200 is an optical surface, which is an exit end of the prism 200, and transmits the incident light reflected by the liquid to the rear end lens.

In one embodiment, the probe housing 100 is generally cylindrical in shape for easy handling, and the diameter of the inner sidewall of the probe housing 100 is in the range of 4mm to 10 mm. The top end of the probe casing 100 is a streamline spoon-shaped structure with a radian, that is, the upper side wall and the lower side wall of the top end of the probe casing 100 are both bent to have radians in the same direction. The inclined plane of the top end of the probe housing 100 is inclined at 45 degrees and is attached to the inclined plane of the prism 200, so that the measurement surface of the prism 200 can be attached to the channel opening of the measurement channel 110. The thickness of the side wall of the front end of the probe housing 100 is greater than that of the side wall of the image sensor, and the prism 100, the light source 800 and the thermistor 900 are fixed inside the top end of the probe housing 100 by matching with the light path body 700. The measurement channel 110 is an arc-shaped channel, and has the same bending direction as the top end of the probe housing 100. The diameter of the inner side wall of the probe housing 100 can be 6mm, that is, the overall structure of the probe-type liquid concentration measuring device is small, and the probe-type liquid concentration measuring device can be applied to more different detection environments.

Further, in this embodiment, the top end of the probe casing 100 is a streamline structure with a radian, so that the whole probe casing 100 is in a "spoon" shape. The probe type liquid concentration measuring device has two embodiments:

embodiment mode 1

Get liquid formula and measure, because the whole of probe casing 100 is "soup ladle" column structure, and the top of probe casing 100 is the streamlined structure that has the radian, and measures passageway 110 and be the arc passageway, and the direction of buckling the same with probe casing 100 top makes probe formula liquid concentration measurement device can hold the liquid of awaiting measuring and measure and detect, has saved the liquid step of getting of burette or pipettor liquid getting, and it is more convenient to use.

Embodiment mode 2

Immersion measurement, when the liquid to be measured has strong pollution and strong corrosivity, the liquid to be measured is contained, and the problem of safety can be caused. In addition, the liquid-taking type measurement is cumbersome, and the liquid to be measured needs to be taken out first and then measured. In this document, an image sensor is disposed at the rear of the reticle 400 inside the probe housing 100, and is used for receiving and transmitting imaging information on the reticle 400. The steps of liquid taking are reduced.

Further, referring to fig. 3, fig. 3 is a partial enlarged view of the main structure of the probe-type liquid concentration measuring apparatus according to the embodiment of the present invention, in this embodiment, since the top end of the probe housing 100 and the measuring channel 110 are both streamline structures having radians, and the bending angle of the measuring channel 110 can cover one end of the measuring channel 110, which is attached to the prism 200, in the lengthwise direction of the probe housing 100. In the process that the probe-type liquid concentration measuring device is inserted into and immersed in the liquid to be measured, the side with the radian at the top end of the probe shell 100 plays a role in protecting the place where the prism 200 is attached to the measuring channel 110, and the prism 200 is prevented from being damaged by the liquid with strong pollution.

In a specific embodiment, the liquid concentration measuring apparatus further includes a circuit board and a temperature sensing device 900, the circuit board is disposed at the top end of the interior of the probe housing 100 and is adhered to the inner side wall of the probe housing 100, and the temperature sensing device 900 and the light source 800 are soldered on the circuit board and electrically connected to a circuit board on the image sensor. The light source 800 is disposed inside the probe housing 100, so that the probe-type liquid concentration measuring apparatus can perform measurement even when immersed in the liquid to be measured. Further, in this embodiment, the light source 800 is disposed below the sidewall of the prism 200, corresponding to the upper measuring channel 110, and provides incident light for detecting the concentration value of the liquid. It should be noted that, the temperature sensing device 900 may be a thermistor, and can be implemented by means of the prior art, and redundant description is not repeated here.

Furthermore, in this embodiment, the light source 800 emits incident light perpendicular to the body length direction of the prism 200, the wavelength of the emitted light is within the range of 559-519nm, and the emitted light is LED light source.

In one embodiment, the lens assembly 300 includes a first lens, and the first lens has an aspheric structure, the incident surface of the first lens is a plane mirror, and the exit surface of the first lens is an aspheric mirror; the reticle 400 is disposed at the focal plane position of the first lens. The diameter of the inner side wall of the probe housing 100 may be 6mm, and the size is small, so that the lens assembly 300 adopts a first lens, and the first lens is an aspheric surface, and has a focusing function, so as to enhance the brightness of emergent light, and make the image on the reticle 400 clearer.

Further, in another embodiment, the lens assembly 300 includes three lenses, including a second lens, a third lens and a fourth lens, where the second lens and the fourth lens are both aspheric structures, one surface of the second lens is a plane mirror, the other surface of the second lens is an aspheric mirror, one surface of the third lens is a concave mirror, and the other surface of the third lens is also a concave mirror. The second lens, the third lens and the fourth lens are sequentially arranged, the axes of the second lens, the third lens and the fourth lens are coaxially arranged, and the reticle 400 is arranged at the focal plane position of the lens group 300. By using the mounting manner of the "cool" lens group 300, the imaging quality on the reticle 400 can be improved, so that the imaging on the reticle 400 is sharper, and the measurement accuracy of the liquid concentration value is further improved.

In an embodiment, the liquid concentration measuring apparatus further includes a light path body 700, the light path body 700 is adhered to the inner side wall of the probe casing 100, the inside top end of the probe casing 100 is provided with a mounting groove 120, and the top end of the light path body 700 extends to have a mounting portion embedded in the mounting groove 120, and the prism 200 and the lens assembly 300 are both disposed on the light path body 700. The light path body 700 is adhered to the inner top end of the probe housing 100, and is used for fixing the light source 800, the prism 200 and the lens group 300 which are arranged inside the probe housing 100.

In a particular embodiment, the image sensor includes a camera 500 and a data cable 600. The camera 500 is disposed at the rear end of the inside of the probe housing 100, adhered to the inner sidewall of the probe housing 100, and the data cable 600 penetrates the rear end of the probe housing 100 to the inside of the probe housing 100, and is electrically connected to the camera 500, so as to transmit image data. To set up the image sensor including camera 500 and data cable 600 at the rear end of probe casing 100, in the mode of using immersion measurement's detection liquid concentration value, the refractometer can't directly observe the formation of image on the slide 400, consequently through adopting image sensor, in addition, the inside wall diameter of probe casing 100 of probe formula liquid concentration measuring device specifically can be 6mm, is difficult to observe the formation of image on the slide 400 through the eyepiece, therefore image sensor's setting conveniently observes the formation of image on the slide 400. It should be noted here that the camera is a miniature camera, which is a conventional means in the prior art, and will not be described herein in too much detail.

Further, in this particular embodiment, the data cable 600 is used to transmit images captured by the camera,

in an embodiment, in order to improve the accuracy of the probe-type liquid concentration measuring apparatus, the prism 200, the lens assembly 300, the reticle 400, and the image sensor are coaxially disposed at the axial center.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A probe-type liquid concentration measuring apparatus, comprising:

the device comprises a probe shell, a light source, a prism, a lens group, a reticle and an image sensor;

the probe shell is of a hollow structure, an accommodating cavity is arranged in the probe shell, and a measuring channel is formed in the top end of the probe shell;

the prism, the lens group and the reticle are sequentially arranged from the top end of the probe shell to the tail end of the probe shell;

the top end of the prism is an inclined plane, the inclined plane is attached to a channel opening of the measuring channel, and the refractive index of the prism is within a range of 1.9-2.1;

the light source is arranged below the prism and corresponds to the positive phase of the measuring channel;

the image sensor is arranged at the tail end of the probe shell and used for transmitting the image on the reticle.

2. The probe-type liquid concentration measuring device according to claim 1, wherein the inclined angle of the inclined plane is 40-50 degrees;

the refractive index of the prism material is as follows: 1.9-2.1;

the whole prism is of a square structure; and is provided with

The side wall of the prism is an optical surface, the side wall of the prism is a measuring surface, the side wall of the prism is an emergent surface, and the side wall of the prism is a matte surface.

3. The probe-type liquid concentration measuring device according to claim 1, wherein the diameter of the inner side wall of the probe housing is within the interval of 4mm-10 mm.

4. The probe-type liquid concentration measuring device according to claim 1, further comprising a circuit board and a temperature sensing device;

the circuit board is arranged at the top end of the interior of the probe shell and is bonded on the inner side wall of the probe shell;

the temperature sensing device and the light source are welded on the circuit board and electrically connected with the circuit board on the image sensor.

5. The probe-type liquid concentration measuring device according to claim 4, wherein the light source emits an emitting light perpendicular to the body length direction of the prism;

the wavelength of the emitted light is within the range of 559-519nm, and the emitted light adopts an LED light source.

6. The probe-type liquid concentration measuring device according to claim 1, wherein one of the lens groups comprises a first lens, and the first lens is an aspheric structure;

the incidence surface of the first lens is an aspherical mirror;

the emergent surface of the first lens is an aspherical mirror;

the reticle is disposed at a focal plane position of the first lens.

7. The probe-type liquid concentration measuring device according to claim 1, wherein the lens group is provided with three, including a second lens, a third lens and a fourth lens;

the second lens and the fourth lens are both aspheric structures, one surface of each second lens is a plane mirror, and the other surface of each second lens is an aspheric mirror;

one surface of the third lens is a concave mirror, and the other surface of the third lens is also a concave mirror;

the second lens, the third lens and the fourth lens are sequentially arranged, and the axes of the second lens, the third lens and the fourth lens are coaxially arranged;

the reticle is arranged at the focal plane position of the lens group.

8. The probe-type liquid concentration measuring device according to claim 1, further comprising a light path body;

the light path body is bonded on the inner side wall of the probe shell;

the probe shell is provided with an installation groove at the top end inside, and the top end of the light path body extends to form an installation part which is embedded in the installation groove;

the prism and the lens group are both arranged on the light path body.

9. The probe-type liquid concentration measuring device according to claim 4, wherein the image sensor comprises a camera and a data cable;

the camera is arranged at the rear end of the interior of the probe shell and is bonded on the inner side wall of the probe shell;

the data cable penetrates through the rear end of the probe shell to the inside of the probe shell, is electrically connected with the camera, the light source and the temperature sensing device and is used for transmitting image data, temperature data and light source control instructions.

10. The probe-type liquid concentration measuring device according to claim 1, wherein the prism, the lens group, the reticle, and the axis of the image sensor are coaxially disposed.