CN217605655U - Wireless probe type liquid concentration measuring device - Google Patents

Abstract

The application relates to a wireless probe type liquid concentration measuring device, including: the device comprises a probe shell, a light source, a prism, a lens group, a reticle, an image sensor and a Bluetooth device. The probe shell is provided with an accommodating cavity for the inside, a measuring channel is arranged at the top end of the probe shell, the bottom end of the probe shell is sealed, 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 port of the measuring channel, 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 measuring channel in the positive phase, and the image sensor is arranged at the tail end of the probe shell, is electrically connected with the Bluetooth device and is used for transmitting images on the reticle. In the using process, the top end of the measuring device is placed into the liquid to be measured without being taken out, the imaging on the reticle is measured, and the measuring result is calculated through an image analysis algorithm. The operation is fast and simple, liquid taking is not needed, and the method is safer when the liquid is measured to have strong corrosivity or strong pollution.

Description

Wireless probe type liquid concentration measuring device

Technical Field

The application relates to the technical field of liquid concentration detection, in particular to a wireless 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 present application provides a wireless probe type liquid concentration measuring device, which solves the problem that liquid needs to be taken during the liquid concentration measuring process.

According to an aspect of the present application, there is provided a wireless probe-type liquid concentration measurement apparatus including: the device comprises a probe shell, a light source, a prism, a lens group, a reticle, an image sensor and a Bluetooth device; the probe shell is of a hollow structure, the interior of the probe shell is provided with an accommodating cavity, the top end of the probe shell is provided with a measuring channel, and the bottom end of the probe shell is sealed; 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 port of the measuring channel, and the refractive index of the prism is in 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 is electrically connected with the Bluetooth device to transmit the image on the reticle.

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 Bluetooth device is arranged at the tail end of the inner part of the probe shell, is connected with the Bluetooth device through the data cable and is used for transmitting light source control instructions of image data and temperature data.

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 Bluetooth device is arranged outside the probe shell and is connected with the camera through the data cable; the data cable runs through the rear end of the probe shell to the inside of the probe shell, one end of the data cable is connected with the camera, and the other end of the data cable is connected with the Bluetooth device.

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 a possible implementation manner, the light source emits incident light perpendicular to the body length direction of the prism, and the wavelength of the emitted light emitted by the light source is within the interval of 559-519 nm; and the light source adopts an LED light source.

In one possible implementation, the inclination angle of the inclined plane is 40-50 degrees; the refractive index of the prism material is 1.9-2.1; the whole prism is of a square structure; 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.

In one possible implementation manner, the liquid concentration measuring device further includes 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 a possible implementation manner, the prism, the lens group, the reticle and the axis of the image sensor are coaxially arranged.

In a 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, 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 arranged in sequence, 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.

The wireless 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 used 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. Wherein, image sensor includes data cable, camera and bluetooth device triplex, and the camera is used for measuring the formation of image on the graticule, goes out the transmission of formation of image through data cable and bluetooth device, can obtain the concentration value of liquid through image analysis processing 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 taking out the measuring device. 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 wireless probe type liquid concentration measuring device according to an embodiment of the present application;

FIG. 2 is a schematic diagram showing another main structure of a wireless probe type liquid concentration measuring device according to an embodiment of the present application;

FIG. 3 is a diagram showing an optical system 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 test example 1 of the probe-type liquid concentration measurement apparatus according to the embodiment of the present application;

fig. 5 is a graph showing an effect of test example 2 of the probe-type liquid concentration measurement apparatus according to the embodiment of the present application;

fig. 6 is a graph showing an effect of test example 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 can 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 is to be understood, however, that the terms "central," "longitudinal," "lateral," "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience of description or simplicity of description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be considered limiting.

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 wireless probe type liquid concentration measuring apparatus according to the embodiment of the present application includes: a probe housing 100, a light source 600, a prism 200, a lens group 300, a reticle 400, an image sensor, and a bluetooth device 1000. The probe shell 100 is a hollow structure with an accommodating chamber arranged inside, a measuring channel is arranged at the top end of the probe shell 100, the bottom end of the probe shell is sealed, the prism 200, the lens group 300 and the reticle 400 are sequentially arranged from the top end of the probe shell 100 to the tail end of the probe shell 100, the top end of the prism 200 is an inclined plane, the inclined plane is attached to a channel port of the measuring channel, the refractive index of the prism 200 is within a range of 1.9-2.1, and the light source 600 is arranged below the prism 200 and corresponds to the positive phase of the measuring channel; the image sensor is disposed at the end of the probe housing 100 and electrically connected to the bluetooth device 1000 for transmitting the image on the reticle 400.

In this embodiment, the prism 200 and the lens assembly 300 are integrated with the reticle 400 in sequence inside the probe housing 100 as an optical measuring device. The top end of the probe housing 100 is opened with a measuring channel, which is adhered to the prism 200 and used as a channel for measuring the concentration value of the liquid. The light source 600 is arranged below the prism 200, and the light source 600 corresponds to the upper and lower positive phases of the channel opening of the measurement channel above and provides light for the liquid and the refraction process of the prism 200. An image sensor is arranged between the end of the probe housing 100 and the reticle 400, and is used for transmitting images on the reticle 400 and performing image analysis processing operation to obtain a concentration value of the liquid to be detected. In the using 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 200. The light source 600 is disposed below the prism 200, and the light source 600 corresponding to the channel opening up and down emits incident light entering the prism 200, and the incident light is refracted by the liquid and reaches the reticle 400 through the lens assembly 300. The image sensor comprises a data cable 900 and a camera 800, the camera 800 is used for measuring an image on the reticle 400, the image is transmitted out through the data cable 900 and the Bluetooth device 1000, and a concentration value of liquid can be obtained through image analysis processing 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 400 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.

Example 1

Referring to fig. 1, the image sensor includes a camera 800 and a data cable 900. The camera 800 is disposed at the rear end of the inside of the probe housing 100, and is adhered to the inner wall of the probe housing 100, and the bluetooth device 1000 is disposed at the rear end of the inside of the probe housing 100, and is connected to the bluetooth device 1000 via the data cable 900, so as to transmit the control command of the light source 600 for transmitting the image data and the temperature data.

Wherein, bluetooth device 1000 and camera 800 are all installed at the inside end of sealed probe casing 100, and the image data that measures camera 800 through bluetooth device 1000 transmits through bluetooth device 1000. So, make concentration measurement device at the measuring overall process, need not to get liquid, also can accomplish the transmission of measurement and data, it is also more convenient to use.

It should be noted that, the information data is transmitted through the bluetooth apparatus 1000, which is a common means in the prior art, and will not be described herein again.

Example 2

Referring to fig. 2, the image sensor includes a camera 800 and a data cable 900. Camera 800 sets up the inside rear end at probe casing 100, bonds on the inside wall of probe casing 100, and bluetooth device 1000 sets up in the outside of probe casing 100, is connected with camera 800 through data cable 900, and data cable 900 runs through the rear end of probe casing 100 to the inside of probe casing 100, and one end is connected with camera 800, and the other end is connected with bluetooth device 1000.

Wherein the camera 800 is adhered to the end inside the probe case 100 for obtaining an image on the reticle 400. The bluetooth device is installed outside the probe case 100, is connected to the camera 800 inside the probe case 100 through the data cable 900, and transmits image data measured by the camera 800. When the liquid concentration measuring device with a small volume is used, the bluetooth device 1000 is disposed outside the probe housing 100 to increase the accommodating volume inside the probe housing 100.

It should be noted that, when the bluetooth apparatus 1000 is used to transmit information data, as the bluetooth apparatus 1000 is used as a small-range wireless connection technology, data communication with convenience, rapidness, flexibility, safety, low cost and low power consumption can be realized between devices, which is a common means in the prior art and will not be described herein in too much detail.

In a specific embodiment, the liquid concentration measuring device further comprises a circuit board and a temperature sensing device. The circuit board sets up at the inside top of probe casing 100, bonds on the inside wall of probe casing 100, and temperature sensing device and light source 600 weld on the circuit board, and the circuit board on with the image sensor is connected electrically. The circuit board sets up the inside top at probe casing 100, bonds on the inside wall of probe casing 100, and temperature sensing device and light source 600 weld on the circuit board, and the circuit board electricity that is connected with image sensor is last. The light source 600 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 600 is disposed below the sidewall of the prism 200, corresponding to the upper measuring channel, and provides incident light for detecting the liquid concentration value. It should be noted that the temperature sensing device may be a thermistor, and may be implemented by means of the prior art, and redundant description is not repeated here.

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 600 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 side wall of the top end of the prism 200 is a surface directly contacting with the measurement channel, 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 for easy handling, and the inner sidewall diameter of the probe housing 100 is in the range of 4mm to 10 mm. The top end of the probe housing 100 is a streamline spoon-shaped structure with a radian, that is, the upper side wall of the top end and the lower side wall of the top end of the probe housing 100 are both bent to form 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. 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 200, the light source 600, and the temperature sensing device 700 are fixed inside the top end of the probe housing 100 by matching with the light path body 500. The measuring channel is an arc-shaped channel, and the bending direction of the measuring channel is the same as that of the top end of the probe shell 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.

In one embodiment, the top end of the probe housing 100 is a streamline structure with a radian, so that the whole probe housing 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 for having the streamlined structure of radian, and the measuring channel is the arc passageway, and is the same with the direction of buckling on probe casing 100 top, makes probe formula liquid concentration measurement device can hold out the liquid of awaiting measuring and detect, has saved the burette or has pipetted getting the liquid step of liquid, and it is more convenient to use.

Embodiment mode 2

Immersion measurement, when the liquid to be measured has strong pollution and strong corrosion, the liquid to be measured is contained, and the problem of safety is caused. In addition, the liquid taking type measurement is complicated, 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 for receiving and transmitting imaging information on the reticle 400. The steps of liquid taking are reduced.

In one embodiment, the light source 600 emits incident light perpendicular to the body length direction of the prism 200, the wavelength of the emitted light is in the range of 559-519nm, and the LED light source 600 is used for the emitted light.

In one embodiment, the inclination angle of the inclined plane is 40-50 degrees, the refractive index of the material of the prism 200 is 1.9-2.1, the whole prism 200 is a square structure, the top side wall and the rear side wall of the prism 200 are both optical surfaces, the top side wall of the prism 200 is a measuring surface, the rear side wall is an exit surface, and the side wall of the prism 200 is a matte surface. Wherein, the inclined angle of the prism 200 is in the interval of 40-50 degrees. In the whole production and manufacturing process of the product, particularly when the inclined plane of the prism 200 is cut to 45 degrees, the difficulty of manufacturing and assembling of the product is the lowest, and the assembling error is the lowest. When the inclination angle of the inclined plane of the prism 200 is 45 degrees, in order to make the incident light reflected by the optical surface of the prism 200 at the channel opening hit the reticle 400 in a symmetrical manner with the minimum incident angle, the glass prism 200 with the material model of H-ZLF90 is adopted to make the incident light hit the reticle 400, so that the image on the reticle 400 is clearer, and the concentration value of the obtained liquid is more accurate.

According to the optical total reflection principle, when the incident light is smaller than the critical angle of total reflection, 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 ° = n2/n1, wherein c is a critical angle of total reflection. n1 is known as the refractive index (nD) of the prism 200. n2 is the refractive index (nD) of the liquid to be 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.

test example 1

Referring to fig. 4 and 4, fig. 4 shows an effect diagram of a test example 1 of the probe-type liquid concentration measuring device according to the embodiment of the present invention, when a refractive index (nD) of a liquid to be measured is 1.32, light equal to a critical angle a of total reflection is totally reflected in a diffusely scattered light beam to generate a light beam U, and is totally reflected by a material surface of a 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.

Test example 2

Referring to fig. 5 and 5, an effect diagram of test example 2 of the probe-type liquid concentration measuring device according to the embodiment of the present invention is shown, when a refractive index (nD) of a measured liquid is 1.42, light equal to a critical angle b of total reflection is totally reflected in a diffusely scattered light beam to generate a light beam V, and is totally reflected by a measurement surface of a prism 200, light greater than the critical angle a of total reflection is totally reflected to generate a light beam with a light beam angle greater than V, and is totally reflected by the measurement 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 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.

Test example 3

Referring to fig. 6 and 6, fig. 6 shows an effect diagram of test example 3 of the probe-type liquid concentration measuring device according to the embodiment of the present invention, when the refractive index (nD) of the liquid to be measured is 1.52, light equal to the critical angle c of total reflection is totally reflected in the diffusely scattered light beam 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 800 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 total reflection critical angle of the measured liquid, and further calculate the refractive index of the measured liquid by the calculation formula of the total reflection critical angle, 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 liquid concentration measuring device further includes a light path body 500. Light path body 500 bonds at the inside wall of probe casing 100, and the mounting groove has been seted up on the inside top of probe casing 100, and the extension of light path body 500 top has the installation department, inlays to establish in the mounting groove, and prism 200, battery of lens 300 all set up on light path body 500. The light path body 500 is adhered to the inner top end position of the probe housing 100, and is used for fixing the light source 600, the prism 200 and the lens group 300 which are arranged inside the probe housing 100.

In one embodiment, the axes of the prism 200, the lens assembly 300, the reticle 400 and the image sensor are coaxially arranged, so that the measured image data is more accurate.

In one embodiment, lens group 300 is provided with one, including the first lens. And the first lens is an aspheric structure, the incident surface of the first lens is an aspheric mirror, the emergent surface of the first lens is an aspheric mirror, and the reticle 400 is disposed at the focal plane position of the first lens.

In one embodiment, the lens assembly 300 is provided with three lenses including a second lens, a third lens and a fourth lens. The second lens and the fourth lens are both aspheric structures, one side is a plane mirror, the other side is an aspheric mirror, one side of the third lens is a concave mirror, the other side is also a concave mirror, the second lens, the third lens and the fourth lens are sequentially placed, the axle centers 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 assembly 300.

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 (10)

1. A wireless probe type liquid concentration measuring device is characterized by comprising:

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

the probe shell is of a hollow structure, the interior of the probe shell is provided with an accommodating cavity, the top end of the probe shell is provided with a measuring channel, and the bottom end of the probe shell is sealed;

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 port 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 is electrically connected with the Bluetooth device and used for transmitting the image on the reticle.

2. The wireless probe-type liquid concentration measuring device according to claim 1, 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 Bluetooth device is arranged at the tail end of the inner part of the probe shell, is connected with the Bluetooth device through the data cable and is used for transmitting light source control instructions of image data and temperature data.

3. The wireless probe-type liquid concentration measuring device according to claim 1, 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 Bluetooth device is arranged outside the probe shell and is connected with the camera through the data cable;

the data cable runs through the rear end of the probe shell to the inside of the probe shell, one end of the data cable is connected with the camera, and the other end of the data cable is connected with the Bluetooth device.

4. The wireless probe type liquid concentration measuring device according to any one of claims 2 to 3, wherein 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.

5. The wireless probe type liquid concentration measuring device according to claim 4, wherein the light source emits incident light perpendicular to the body length direction of the prism, and the light source emits emitted light with a wavelength within an interval of 559-519 nm;

and the light source adopts an LED light source.

6. The wireless probe-type liquid concentration measuring device according to claim 1, wherein the inclined plane has an inclination angle of 40-50 degrees;

the refractive index of the prism material is 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.

7. The wireless probe-type liquid concentration measuring device according to claim 1, further comprising an optical path body;

the light path body is adhered to the inner side wall of the probe shell;

the top end of the interior of the probe shell is provided with an installation groove, 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.

8. The wireless probe-type liquid concentration measuring device according to claim 1, wherein the prism, the lens group, the reticle, and an axial center of the image sensor are coaxially disposed.

9. The wireless probe type liquid concentration measuring device according to claim 1, wherein one of the lens sets 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.

10. The wireless 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 arranged in sequence, 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.

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