TWM672887U - Portable liquid transmittance measuring device - Google Patents

Abstract

A portable liquid transmittance measuring device is characterized by having a sensing head for immersion in a liquid to be measured. The sensing head has a storage space with a top opening and a sampling portion disposed upright at the bottom. The sampling portion has a light-transmitting housing to provide a liquid sampling space. The light-transmitting housing has a light-incident side for receiving incident light via a first optical fiber, and a light-outcending side opposite the light-incident side for providing penetrating light via a second optical fiber. The liquid sampling space is disconnected from the storage space and connected to a space outside the sensing head. This allows the liquid to be measured to enter the liquid sampling space for transmittance testing without entering the storage space.

Description

Portable liquid transmittance measuring device

This work relates to a liquid transmittance measurement device, particularly a portable liquid transmittance measurement device.

Determining whether a liquid meets a specific standard by measuring its light transmittance has been widely used in operations such as textile dye preparation, water quality testing, and liquid food coloring. Typical liquid transmittance measurement techniques include: directing incident light onto the light-incident side of a light-transmitting container containing the liquid to be tested; directing a beam splitter to receive transmitted light emitted from the light-exiting side of the container; and generating a transmittance value based on the ratio of the intensity of the transmitted light to the incident light.

Please refer to Figures 1a and 1b . Figure 1a is a schematic diagram of a conventional liquid transmittance measurement device; Figure 1b is a schematic diagram of manually pouring a test liquid into a transparent container of the liquid transmittance measurement device in Figure 1a . As shown in Figure 1a , a liquid transmittance measurement device 10 includes a light source 11 , a transparent container 12 , and a spectrometer 13 . The device transmits the test results to a computer 20 to obtain the transmittance of a test liquid 12a . The transparent container 12 may be a quartz glass container.

However, as shown in FIG. 1 b , the manual operation method is inefficient, and if the light-transmitting container 12 collides with a hard object due to careless operation, the light-transmitting container 12 is likely to be broken.

In order to solve the above problems, a novel liquid transmittance measuring device is urgently needed in this field.

The main purpose of this invention is to provide a portable liquid transmittance measuring device, which can detect the transmittance of a liquid by directly immersing a sensor head in the liquid to be tested, thereby eliminating the trouble of manual sampling.

Another purpose of this invention is to provide a portable liquid transmittance measuring device, which can disconnect the liquid sampling space of the sensor head from the storage space of the sensor head, so that when the liquid to be measured enters the liquid sampling space, the storage space can still remain dry.

Another object of this invention is to provide a portable liquid transmittance measuring device that can shield the ambient light of the sensing head by a light-proof cover, thereby improving the accuracy of transmittance detection.

In order to achieve the aforementioned purpose, a portable liquid transmittance measuring device is proposed, which has: a sensing head for immersing in a liquid to be measured, having a accommodating space, the accommodating space having a top opening and a sampling portion erected at the bottom, the sampling portion having a light-transmitting shell to provide a liquid sampling space, and the light-transmitting shell having a light-entering side and a light-emitting side opposite to the light-entering side, wherein the liquid sampling space is not connected to the accommodating space and is connected to the external space of the sensing head so that the liquid to be measured enters therein; An optical fiber cable comprising a first optical fiber and a second optical fiber, one end of which is connected to the sampling portion and an opposite end is exposed to the sensing head, wherein the first optical fiber is connected to the light incident side and the second optical fiber is connected to the light output side; an optical processing module having a light source and a spectrometer, the light source is connected to the first optical fiber to provide an incident light to the light incident side, and the spectrometer is connected to the second optical fiber to receive the transmitted light from the light output side; and a control module coupled to the optical processing module to determine the transmittance of the liquid to be tested according to the ratio of an electrical signal value corresponding to the light intensity of the transmitted light to a reference electrical signal value.

In a possible embodiment, the reference electrical signal value may be an electrical signal value corresponding to the light intensity of the incident light, or an electrical signal value corresponding to the light intensity of the transmitted light measured by immersing the sensor head in a colorless aqueous solution.

In possible embodiments, the optical splitter may be a multi-filter optical splitter or a grating optical splitter.

In possible embodiments, the light source may be a full-spectrum LED, a halogen lamp, or a xenon arc lamp.

In one embodiment, the control module has a PLC controller.

In one embodiment, the control module further has an LCD display.

In one embodiment, the control module further has a communication interface for communicating with an external device.

In possible embodiments, the communication interface may be a wired communication interface or a wireless communication interface.

In possible embodiments, the external device may be a computer device or a smart phone.

In one embodiment, the portable liquid transmittance measuring device further comprises a light-proof cover for fitting over the sensing head to shield the sensing head from ambient light.

In order to enable the Review Committee to further understand the structure, features, purpose, and advantages of this creation, we have attached diagrams and detailed descriptions of preferred specific embodiments as follows.

Please refer to Figure 2, which is a schematic diagram of an embodiment of the portable liquid transmittance measuring device of this invention. As shown in Figure 2, the portable liquid transmittance measuring device has a sensor head 110, an optical fiber cable 120, an optical processing module 130, and a control module 140.

The sensor head 110 is designed to be immersed in a test liquid 30a contained in a container 30 and has a receiving space 111. Specifically, the receiving space 111 has a top opening 111a and a sampling portion 112 disposed on a bottom 111b. The sampling portion 112 comprises a light-transmitting housing to provide a liquid sampling space. The light-transmitting housing has a light-entering side 112a and a light-emitting side 112b opposite the light-entering side 112a. The liquid sampling space is disconnected from the receiving space 111 and communicates with the exterior of the sensor head 110, allowing the test liquid 30a to enter.

The optical fiber cable 120 includes a flexible sleeve 120a and a first optical fiber 121 and a second optical fiber 122 encased therein. One end of the optical fiber 120 is connected to the sampling portion 112, while the opposite end is exposed to the sensor head 110. The first optical fiber 121 is connected to the light-incoming side 112a, and the second optical fiber 122 is connected to the light-emitting side 112b.

The optical processing module 130 includes a light source 131 and a beam splitter 132. The light source 131 is connected to the first optical fiber 121 to provide incident light to the light-entering side 112a, and the beam splitter 132 is connected to the second optical fiber 122 to receive transmitted light from the light-emitting side 112b. The light source 131 can be a full-spectrum LED (light emitting diode), a halogen lamp, or a xenon arc lamp. The beam splitter 132 can be a multi-filter beam splitter or a grating beam splitter.

The control module 140 is coupled to the optical processing module 130 to determine the transmittance of the liquid 30a to be tested based on the ratio of the electrical signal value corresponding to the light intensity of the transmitted light to a reference electrical signal value, wherein the reference electrical signal value can be the electrical signal value corresponding to the light intensity of the incident light, or the electrical signal value corresponding to the light intensity of the transmitted light measured by immersing the sensor head 110 in a colorless aqueous solution in advance, and the electrical signal value can be a voltage signal value or a current signal value. For example, assuming that the electrical signal value corresponding to the intensity of incident light is _I1 , the electrical signal value corresponding to the intensity of light transmitted through the colorless aqueous solution is _I0 , and the electrical signal value corresponding to the intensity of light transmitted through the test liquid 30a is _Ix , then the transmittance of the test liquid 30a can be expressed as _Ix / _I1 or _Ix / _I0 , where _I0 and _I1 are both prepared in advance. That is, before measuring the electrical signal value corresponding to the intensity of light transmitted through the test liquid _30a , the electrical signal value corresponding to the intensity of incident light _I1 is first measured, or the electrical signal value corresponding to the intensity of light transmitted through the colorless aqueous solution _I0 is first measured in the container 30.

Specifically, the control module 140 includes a PLC (programmable logic controller) controller 141, an LCD (liquid crystal display) screen 142, and a communication interface 143. The PLC controller 141 is used to execute the transmittance-related calculation program, the display screen 142 is used to display the transmittance and other related parameters, and the communication interface 143, which can be a wired communication interface or a wireless communication interface, is used to communicate with an external device 200, wherein the external device 200 can be a computer device or a smart phone.

Please also refer to Figure 3, which is a schematic diagram of another embodiment of the portable liquid transmittance measurement device of this invention. As shown in Figure 3, the portable liquid transmittance measurement device further includes a light-proof cover 113 that fits over the sensor head 110 to shield the sensor head 110 from ambient light, thereby improving the accuracy of transmittance detection.

Based on the above design, this creation has the following advantages:

1. The light transmittance of a liquid can be measured by directly immersing a sensor head in the liquid, thus eliminating the trouble of manual sampling;

Second, by disconnecting the liquid sampling space of the sensing head from the containing space of the sensing head, the containing space can remain dry when the liquid to be tested enters the liquid sampling space; and

3. A light-proof cover can be used to shield the sensor head from ambient light, thereby improving the accuracy of transmittance detection.

The invention disclosed herein is only one of the preferred embodiments. Any partial changes or modifications that are based on the technical concept of the invention and are easily inferred by a person skilled in the art do not deviate from the scope of the patent rights of the invention.

10: Liquid transmittance measuring device 11: Light source 12: Translucent container 12a: Liquid to be measured 13: Spectrometer 20: Computer device 30: Container 30a: Liquid to be measured 110: Sensor head 111: Accommodation space 111a: Top opening 111b: Bottom 112: Sampling portion 112a: Light input side 112b: Light output side 113: Optical shield 120: Fiber optic cable 120a: Flexible sleeve 121: First optical fiber 122: Second optical fiber 130: Optical processing module 131: Light source 132: Spectrometer 140: Control module 141: PLC controller 142: LCD display 143: Communication interface 200: External device

Figure 1a is a schematic diagram of a conventional liquid transmittance measuring device; Figure 1b is a schematic diagram of manually pouring a liquid to be measured into a light-transmittance container of the liquid transmittance measuring device of Figure 1a; Figure 2 is a schematic diagram of an embodiment of a portable liquid transmittance measuring device of the present invention; and Figure 3 is a schematic diagram of another embodiment of a portable liquid transmittance measuring device of the present invention.

30:Container

30a: Liquid to be tested

110: Sensor head

111: Storage Space

111a: Top opening

111b: Bottom

112: Sampling Department

112a: light incident side

112b: light output side

120: Fiber optic cable

120a: Flexible casing

121: First optical fiber

122: Second optical fiber

130: Optical processing module

131: Light Source

132: Optical Splitter

140: Control Module

141:PLC controller

142: LCD display

143: Communication Interface

200: External device

Claims (10)

A portable liquid transmittance measuring device comprises: a sensing head for immersing in a liquid to be measured, having a accommodating space, the accommodating space having a top opening and a sampling portion erected at the bottom, the sampling portion having a light-transmitting shell to provide a liquid sampling space, and the light-transmitting shell having a light-entering side and a light-emitting side opposite to the light-entering side, wherein the liquid sampling space is disconnected from the accommodating space and is connected to the external space of the sensing head so that the liquid to be measured enters therein; An optical fiber cable comprising a first optical fiber and a second optical fiber, one end of which is connected to the sampling portion and an opposite end is exposed to the sensing head, wherein the first optical fiber is connected to the light incident side and the second optical fiber is connected to the light output side; an optical processing module having a light source and a spectrometer, the light source is connected to the first optical fiber to provide an incident light to the light incident side, and the spectrometer is connected to the second optical fiber to receive the transmitted light from the light output side; and a control module coupled to the optical processing module to determine the transmittance of the liquid to be tested according to the ratio of an electrical signal value corresponding to the light intensity of the transmitted light to a reference electrical signal value. As described in item 1 of the patent application, the portable liquid transmittance measuring device, wherein the reference electrical signal value is an electrical signal value corresponding to the intensity of the incident light, or an electrical signal value corresponding to the intensity of the transmitted light measured by immersing the sensor head in a colorless aqueous solution. The portable liquid transmittance measuring device as described in item 1 of the patent application, wherein the spectrometer is a multi-filter spectrometer or a grating spectrometer. The portable liquid transmittance measuring device as described in item 1 of the patent application, wherein the light source is a light source selected from the group consisting of a full-spectrum LED, a halogen lamp, and a xenon arc lamp. As described in item 1 of the patent application, the portable liquid transmittance measuring device, wherein the control module has a PLC controller. As described in item 5 of the patent application, the portable liquid transmittance measuring device, wherein the control module further has an LCD display. As described in item 6 of the patent application, the portable liquid transmittance measuring device, wherein the control module further has a communication interface for communicating with an external device. As described in item 7 of the patent application, the portable liquid transmittance measuring device, wherein the communication interface is a wired communication interface or a wireless communication interface. As described in item 7 of the patent application, the portable liquid transmittance measuring device, wherein the external device is a computer device or a smart phone. The portable liquid transmittance measuring device as described in item 1 of the patent application further has a light-proof cover for fitting over the sensing head to shield the sensing head from ambient light.