JPH0617871B2 - Measuring device for turbidity and chromaticity - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention mainly measures turbidity, chromaticity, etc. used for measuring turbidity, chromaticity, etc. of a fluid flowing in a pipeline such as a water supply pipe. Regarding the device.

<Prior Art> For example, when measuring the turbidity of a fluid such as water flowing in a pressured pipe such as a water supply pipe, the configuration shown in FIG. 12 has been generally used. That is, the sample water taken out by providing the tap 2 on the water pipe 1 is guided to the defoaming tank 5 from the sample water inlet 3 through the sample water adjusting valve 4 and is defoamed.
Part of the sample water introduced to the defoaming tank 5 overflows and is drained through the pipe 6, and the fully degassed sample water at the bottom of the defoaming tank 5 is measured through the pipe 7 for turbidity. Measuring tank 8 for
It gushes into the measuring tank 8 from the bottom of the. This measuring tank 8
Has a structure in which the surface of the water that springs out is stably held so that the surface of the water hardly rises, and the sample water that overflows in the measuring tank 8 is guided to the drain port 10 through the pipe 9. Reference numeral 11 is a drain valve for draining the defoaming tank 5.

Light emitted from the light source 13 in the instruction transmission unit 12 is guided to the measurement tank 8 through the fiber 14, and this light is transmitted through the sample water in the measurement tank 8. The scattered light by the sample water is guided to the light receiving element 16 in the instruction transmission section 12 via the optical fiber 15, the output of this light receiving element 16 is amplified by the amplifier 17 and given to the processing section 18, and this processing section 18 is provided. At, a signal corresponding to turbidity is created. This signal is input to a personal computer or the like (not shown) via a cable. The processing unit 18 also gives a signal to the display unit 19 for displaying the measured value of the turbidity.

<Problems to be Solved by the Invention> In the above configuration, a configuration for collecting water from the water pipe 1, a configuration for measuring turbidity, and a configuration for transmitting an instruction of measurement results are provided separately. Therefore, it is necessary to provide a pedestal and install each component, resulting in a large scale configuration.

For this reason, a great deal of labor is required to install the device, a tap 2 needs to be specially provided for water sampling, and construction for drainage is also required, which facilitates measurement. There was a problem that I could not.

The configuration for measuring the chromaticity is almost the same as the above-mentioned configuration, and the configuration is also large, and the measurement cannot be easily performed.

Therefore, the present invention solves the above technical problems and provides a turbidity / chromaticity measuring device having a compact configuration and capable of easily measuring turbidity, chromaticity and the like. The purpose is to do.

<Means and Actions for Solving the Problem> A measuring device for turbidity, chromaticity, etc. according to claim 1 for achieving the above-mentioned object is to measure turbidity, chromaticity, etc. of a fluid flowing in a pipe line. A measuring device for measuring, comprising: a joining portion joined to a branch passage provided with valves already installed in the pipeline, and a long shape inserted into the pipeline through the joining portion and the branch passage. Of the turbidity / chromaticity light source for illuminating the fluid, which is disposed at the tip of the insertion core, and the light from the turbidity / chromaticity light source that is scattered in the fluid. And a detector having a light receiving element for scattered light that receives the light.

According to such a configuration, the elongated insertion core having the detection unit for measuring turbidity and chromaticity at the tip is inserted into the conduit through which the fluid to be measured flows through the existing branch passage. By doing so, measurement of turbidity and chromaticity is achieved.

The turbidity and chromaticity are measured by receiving the scattered light in the fluid from the light from the turbidity / chromaticity light source that illuminates the fluid with the scattered light receiving element. That is, the higher the turbidity, the greater the scattered light, and therefore the turbidity can be measured based on this. Further, if a pair of light receiving elements for scattered light is provided, for example, the chromaticity can be measured based on the difference in output characteristics with respect to the chromaticity of each element. In addition, chromaticity may be measured by providing a color filter in association with each element.

In the turbidity / chromaticity measuring device according to a second aspect of the present invention, the insertion core has flexibility.

With this configuration, even if the above-mentioned branch passage already installed in the pipeline through which the fluid to be measured flows is bent, the detection unit can be guided into the pipeline to measure turbidity and chromaticity. .

The turbidity / chromaticity measuring device according to claim 3, wherein the detection unit has a flow passage through which the fluid flows, and the turbidity / chromaticity light source and a pair of transmissions sandwich the flow passage. A light receiving element for light is provided, and the light receiving element for scattered light is provided so as to face the flow passage in a direction intersecting a path of light from the light source for turbidity / chromaticity. Is characterized in that.

With this configuration, the chromaticity is measured from the difference between the outputs of the pair of transmitted light receiving elements that receive the transmitted light emitted from the turbidity / chromaticity light source and transmitted through the fluid. This difference in the output of the light receiving element for transmitted light is caused by the characteristics of each element, and the correlation between the chromaticity and the output of each element depends on the characteristics of each element. Is measured. Of course, a color filter may be provided in each light receiving element to measure chromaticity.

On the other hand, in the direction crossing the path of the light from the turbidity / chromaticity light source, a scattered light light receiving element is provided facing the flow passage, and the output of the transmitted light light receiving element and Turbidity is measured by evaluating the output of the scattered light receiving element together.

Further, in the turbidity / chromaticity measuring device according to a fourth aspect of the present invention, the detection unit includes a flow velocity sensor that detects a flow velocity of the fluid in the conduit.

With this configuration, the flow velocity of the fluid can also be measured. Moreover, when a flexible insertion core is used as described above, even if the existing branch path in the pipeline is bent, the flow path can be measured using this bent branch path. It can be carried out.

Further, in the turbidity / chromaticity measuring device according to a fifth aspect of the present invention, the detection unit is provided with a conductivity detector that detects the conductivity of the fluid in the conduit.

With this configuration, the conductivity of the fluid can also be measured.

Further, in the turbidity / chromaticity measuring device according to claim 6, the insertion core accommodates an image fiber for image transmission, and a distal end of the insertion core is provided with a light source for illumination. An objective lens for forming an image of an area illuminated by the illumination light source on one end of the image fiber is provided, and the objective lens can be used as an endoscope.

With this configuration, it is possible to perform an internal view of the inside of the duct, so that the device is remarkably multifunctional. Thus, for example, when measuring the turbidity and chromaticity and inspecting the inside of the pipe for inspecting the inside of the pipe after construction, almost no individual work is required for each measurement.

<Examples> Detailed description will be given below with reference to the accompanying drawings showing examples.

FIG. 1 is a front view showing a basic structure of an embodiment of the present invention with a part cut away. This device is, for example, a water pipe 6
It measures the turbidity, chromaticity, etc. of fluids such as water flowing through a pressured pipe line such as 1 (see FIG. 7), for example, an air valve already installed in a water pipe for venting air. It has a joint portion 21 to be joined to the branch passage having the valves by using a bolt or a vise. A water stop portion 22 for preventing the fluid from flowing out from the pressure pipe is attached to the joint portion 21, and the joint portion 21 and the water stop portion 22 are inserted to have an outer shell made of, for example, a stainless pipe. A long insertion core 23 is arranged. The insertion core 23 accommodates an image fiber (not shown) for image transmission inside, and a state near the tip end portion thereof is provided in the instruction transmission portion 24 disposed at the base end portion thereof. It can be visually observed through the eye part 25 and can be recorded in a still camera, a VTR or the like. In this way, the insertion core 23 constitutes a part of the endoscope, and further, the inside thereof accommodates signal lines for transmitting various signals and the like. 70 is an instruction transmission unit 24
Is a cable adapter from which a signal indicating the measurement result is derived, and the signal can be transmitted to a management center or the like arranged at a distance via a cable connected to the cable adapter 70, and to an IC memory card or the like. It is also possible to record the data.

A detection unit 26 is attached to the tip of the insertion core 23. The detection unit 26 can be housed in a housing recess 27 formed in the water stop unit 22, and damages during transportation can be prevented.

A handle 28 having a substantially L-shape is fixed near the instruction transmitting portion 24 at the base end portion of the insertion core 23 so as to protect the instruction transmitting portion 24. The water stop portion 22 is provided with a stopper ring 29 for fixing the insert core 23. The handle ring 28 is rotated around the insert core 23 while the stopper ring 29 is loosened, and the arrow 3
By biasing the insertion core 23 in the direction 0,
Can be displaced in any direction.

The water stop portion 22 has, for example, a recess 31 having a mortar-shaped bottom portion on the side opposite to the joint portion 21, and a bushing 32 is fitted into the recess 31 to insert the recess 31. The bushing 32 is inserted through the core 23. The stopper ring 29 is adapted to be screwed into an internal thread formed in the recess 31, and when the stopper ring 29 is loosened, since the bushing 31 has a small force to pinch the insertion core 23, the storage recess 27 is formed. It is possible to displace the insertion core 23 while preventing the fluid from flowing out, and when the stopper ring 29 is tightly fastened, the bushing 31 elastically deforms in the recess 31 to sandwich the insertion core 23 with a strong force. , The insertion core 23 is fixed.

As shown in FIG. 1A, the stopper ring 29 has a plurality of recesses 33 formed at intervals in the circumferential direction thereof, and is easily fastened by a tool 34 having a claw portion 34a that engages with the recess 33. And can be loosened again.
With this configuration, there is an advantage that the work is simplified as compared with the case where the stopper ring is attached using the bolt and the nut.

2 is an enlarged front view showing the structure of the detection unit 26, FIG. 3 is a side view thereof, and FIG. 4 is a sectional view taken along the section line IV-IV of FIG. . The detection part 26 has, for example, a connector part 26A that is screwed into an inner screw formed at the tip of the insertion core 23, and a body part 26B that is streamlined. The body portion 26B is formed with a circulation hole 37 for circulating a fluid, and various analyzes are performed on the fluid passing through the circulation hole 37. Reference numeral 38 is an O-ring for airtightly coupling the detection unit 26 to the insertion core 23.

As shown in FIG. 2, the top portion 35 and the bottom portion 36 of the body portion 26B have a shape in which a part of a sphere is cut out by a flat surface. As a result, the fluid introduced into and out of the circulation hole 37 is separated in the vicinity of the inlet of the circulation hole 37 without causing turbulent flow, and the flow velocity in the circulation hole 37 is reduced to that of the fluid in the pressured conduit to be measured. It can be equal to the flow rate.

5 and 6 are conceptual diagrams showing a principle configuration for various measurements in the detection unit 26, FIG. 5 is a front view corresponding to FIG. 2 above, and FIG. 3 is a side view corresponding to FIG. 3 in FIG. On the side wall 39 (see FIG. 4) on one side facing the flow hole 37 in the detection unit 26, turbidity / chromaticity light sources 41A and 41B configured by light emitting diodes or the like.
Is provided. On the other side wall 40, a light absorption hole 42 for guiding the light from the turbidity / chromaticity light sources 41A, 41B to the outside of the detection unit 26 is formed, and the light absorption hole 42 has a fixing member made of a transparent material. A pair of transmitted light receiving elements 44A and 44B fixed by 43 (see FIG. 4) are provided. Further, the light sources 41A, 4
A light receiving element 45 for scattered light for detecting the light scattered by the fluid flowing through the flow hole 37 among the light emitted from 1B.
A and 45B are provided. That is, the light receiving elements 45A and 45B for scattered light are arranged facing the circulation hole 37 in a direction intersecting the paths of the light from the light sources 41A and 41B. In FIG. 4, reference numeral 46 designates turbidity / chromaticity light sources 41A and 41B and light receiving elements 44A and 44B;
It is a passage for arranging a signal line or the like connecting between 45A, 45B and the like and the transmission instruction section 24 (see FIG. 1). Reference numeral 47 is a liquid contact part made of a translucent material such as glass.

The scattered light increases as the turbidity of the fluid flowing through the flow hole 37 increases, and the transmitted light is attenuated accordingly. Therefore, the output of the transmitted light receiving elements 44A and 44B and the scattered light receiving element 45A,
Turbidity can be measured from the output of 45B.

The light absorption hole 42 is provided so that the scattered light receiving elements 45A and 45B do not receive excess light when there is no turbidity. That is, the detection unit 2
6, the surface facing the flow hole 37 is painted black or the like to improve the measurement accuracy, and it is not necessary to consider the influence of light scattering on the surface at the initial stage of use. When the surface is contaminated by use, the influence of scattered light from this surface cannot be ignored. On the other hand, if the light is allowed to escape to the outside from the light absorption hole 42, the influence of scattered light can be surely eliminated and the measurement can be performed accurately. Moreover, the light absorption hole 4 shown in FIG.
Since 2 is formed in a hood shape, the light receiving element 44A,
The light scattered by 44B is prevented from returning to the inside of the flow hole 37, which further improves the measurement accuracy of the turbidity.

The light receiving elements 44A and 44B are the light sources 41A and
The light from 41B may be attached so that it can escape to the outside through the light absorption hole 42, and instead of using the transparent fixing member 43 as described above, a rod-shaped supporting member is used for the main body portion 26B. It may be fixed.

The chromaticity is measured based on the outputs of the light receiving elements 44A and 44B for transmitted light. The outputs of the light receiving elements 44A and 44B are
Although it changes depending on the chromaticity of the fluid flowing through the flow hole 37,
Even if the light receiving elements 44A and 44B have the same specifications, there are always individual differences. Therefore, if the difference in the output of each element corresponding to the chromaticity is measured in advance by experiments, the light receiving elements 44A and 44B can be obtained. It is possible to measure the chromaticity based on the difference in the outputs. Of course, color filters may be arranged on the light receiving elements 44A and 44B to measure the chromaticity.

In this embodiment, two light sources for turbidity and chromaticity are provided. It is possible to use a light source having a weak light amount, and it is empirically preferable to use a plurality of light sources. This is because it is found that it is easy to calibrate the change in the light amount due to the contamination of the liquid portion 47, and even when one of the light sources cannot be generated, the other can be backed up to improve the reliability.

Further, two light receiving elements for scattered light are used, for example, the measurement accuracy can be improved by using the output signal of whichever has the larger output for the measurement of turbidity, and when one of them fails. But the other can back it up.

In addition to the above-described configuration for measuring turbidity and chromaticity, the detection unit 26 is provided with ultrasonic flow velocity sensors 48A and 48B that are arranged so as to be displaced in the flow direction of the fluid flowing through the flow hole 37. Therefore, the flow velocity is measured using the Doppler effect or the like. Further, a conductivity detector 49 composed of a pair of electrodes arranged so as to face the flow hole 37 is provided.

In addition, in the portion of the insertion core 23 near the detection unit 26, an illumination light source 50 that illuminates an area near the detection unit 26.
Is provided. In the vicinity of the illumination light source 50, an objective lens 51 for forming an image in the illumination area of the light source 50 is provided at one end of the above-mentioned image fiber housed in the insertion core 23. The image formed on one end of the image fiber is transmitted through this image fiber and observed by the eyepiece section 25 of the instruction transmission section 24. In addition,
When the turbidity and the chromaticity are detected, the illumination light source 50 is turned off, which improves the measurement accuracy.

FIG. 7 is a conceptual diagram showing a usage example of the above apparatus. In the air valve 62 for venting the existing water in the water supply pipe 61,
For example, the flange 21a of the joint portion 21 is fixed with a vise or a bolt to install the device. Reference numeral 63 is an operation lever for opening and closing the valve. After fixing the joint portion 21 to the air valve 62, the operating lever 63 is operated to open the air valve 62, and the stopper ring 2
When the handle 28 is rotated around the insertion core 23 while being urged toward the water pipe 61 in the state where 9 is loosened, the detection unit 26 is guided into the water pipe 61, and the detection unit 26 is shown in FIG. It becomes a state.

In this state, the inside of the water pipe 61 can be viewed through the eyepiece 25, and the light receiving elements 44A, 44B; 45A, 4
The chromaticity and turbidity can be measured based on the output from 5B,
The flow velocity and the flow rate are obtained based on the outputs of the flow velocity sensors 48A and 48B, and the conductivity detector 49 measures the conductivity of the water flowing in the water pipe 61. Each function
It can be selectively used by operating an operation unit (not shown) provided in the instruction transmission unit 24.

According to such a configuration, since it is not necessary to stop the flow of water, each measurement described above can be performed without causing water cutoff, and it is not necessary to assemble a large-scale pedestal like the configuration shown in FIG. Since the whole is compactly integrated, it can be easily transported to easily measure turbidity, chromaticity, and the like. Also, since the configuration is simple,
This can contribute to a significant reduction in cost. Moreover,
Since it is not necessary to take water from the water pipe 6, and naturally, no special configuration and construction for taking water and draining are required, which is further advantageous in reducing the cost for measurement.

It should be noted that if a cable is connected to the cable adapter 70 provided in the instruction transmission unit 24 and information is transmitted to a management center or the like which is arranged away from the device, for example, the air valves 62 at a plurality of locations can be provided. The above-mentioned various measurements at a plurality of observation points can be performed at all times by permanently installing the respective devices.

FIG. 8 is a conceptual diagram showing the basic construction of another embodiment of the present invention. In FIG. 8, parts that are the same as the parts shown in FIG. 1 are given the same reference numerals. The most characteristic difference of the present embodiment from the above-described first embodiment is that the instruction transmission unit 24 and the detection unit 26 are coupled by a flexible insertion core 81. . The insert core 81 is made of, for example, spiral stainless steel or the like and has a tube whose surface is Teflon-processed to improve sliding, as an outer shell. The insert core 81 contains an image fiber, a signal line, and the like. .

The insertion core 81 is attached to the joint portion 21 and has a water blocking portion 82 that prevents fluid from flowing out. This water stop 82
Is the first above because the insertion core 81 has flexibility.
It is not possible to have the same configuration as the water shut-off portion 22 of the embodiment described above, for example, a labyrinth shown in FIG. 9 is applied, and a plurality of blade-shaped portions 86 that are pressed against the insertion core 81 by the pressure of the fluid The water blocking core 87 in the step is used to prevent the fluid from flowing out by the pressure of the fluid itself.
With this configuration, it is easy to displace the insertion core 81 in the direction of the arrow 88A, and the insertion core 81 can be displaced in the direction of the arrow 88B by reducing the pressure of the fluid. Further, the insertion core 81 can be freely rotated.
Reference numeral 89 is an O-ring, and 90 is an attachment portion formed with an outer screw for fixing to the joint portion 21.

An insertion core drive unit 83 for displacing the insertion core 81 is provided in relation to the water stop unit 82. The insertion core driving unit 83 includes, for example, a pair of rollers (not shown) that hold the insertion core 81, and the handle 84 is attached to the axis line 8.
When the roller is rotated around 5, the above roller is rotated and the insertion core 81 is displaced.

FIG. 10 is a diagram showing a usage example of the apparatus of this embodiment. This device is used by being attached to, for example, a fire hydrant 93 to which water is supplied from a water supply pipe 91 through a pipe 92 having a bent portion 92a. In this case, the joint portion 21 is
If it is configured in the same manner as the fire hydrant base used for a fire hose, the device can be attached with one touch. Reference numeral 94 is an operation lever for opening and closing the valve.

After fixing the joint portion 21 to the water inlet 95 of the fire hydrant 93,
By operating the operation lever 94 to open the valve and rotating the handle 84, the insertion core 81 is sent from the fire hydrant 93 to the bent path from the bent pipe 92 to the water pipe 91, whereby the detector 26 is supplied with water. It can reach the inside of the pipe 91.

Since the insertion core 81 has flexibility, the instruction transmission unit 24 cannot be supported by the insertion core 81. Therefore, for example, the instruction transmission unit 24 is supported by the support member 96 attached to the insertion core drive unit 82. It is preferable to securely support By doing so, it is possible to favorably perform internal observation, various operations in the instruction transmission unit 24, visual inspection of the instrument, and the like.

As described above, according to the present embodiment, even if the path to the pressured conduit is bent, the detection unit 26 can be guided into the pressured conduit, thus improving versatility. .

The present invention is not limited to the above embodiments. For example, in the above embodiment, the flow velocity is measured by the ultrasonic flow velocity sensors 48A and 48B, but instead of this, for example, when the fluid is conductive, an electromagnetic induction type sensor is applied, Further, a specific heat type sensor may be applied. In addition, a pressure sensor such as a strain gauge that measures the total pressure and static pressure of the fluid is arranged in a portion of the insertion core 23 near the detection unit 26, and the flow velocity is detected from the difference between the total pressure and the static pressure. The configuration may be applied (see, for example, Japanese Patent Publication No. 2-11847). In this case, the tip end portion of the insertion core 23 forms a part of the detection portion.

Further, in the above embodiment, the turbidity / chromaticity light sources 41A and 42B arranged in the detection unit 26 are constituted by light emitting elements, but instead of this, for example, the instruction transmission unit 2 is used.
The light source for turbidity / chromaticity may be configured such that the light from the light source provided inside 4 is guided by the optical fiber accommodated in the insertion cores 23 and 81. Light receiving elements 44A, 44B; 45A,
The same applies to 45B, and the transmitted light or the scattered light may be guided to the light receiving element provided in the instruction transmission section 24 by a plurality of optical fibers each having one end arranged at the arrangement position of each element in FIG. Good.

Further, for example, if a touch rubber or the like that generates a signal when it comes into contact with a pipe wall or the like is provided at the bottom of the detection unit 26, the diameter of the pipe can be measured.

Further, in the above-described embodiment, the detection unit 26 is configured to have the circulation hole 37. However, in addition to this, for example, a light source for turbidity / chromaticity that illuminates a fluid on the outer peripheral surface of a simple cylinder without a circulation hole. And a light receiving device for scattered light that receives light scattered by the fluid among the light from the light source may be applied. In this case, at least two light receiving elements for scattered light are used.
If provided individually, the chromaticity can be measured by utilizing the difference in the characteristics of each element. With this structure, the cost can be reduced as compared with the structure shown in FIG.

Furthermore, in the above-described embodiment, the case where the air valve or the fire hydrant is used has been described, but a branch passage having any valves already installed in the pipeline through which the fluid to be measured flows may be used.

Further, in the above embodiment, the case of measuring the turbidity, chromaticity, etc. of the fluid flowing in the pressured pipeline has been described, but the device of each of the above-mentioned embodiments is used in the pipelines other than the pressured pipeline. Can also be applied to the measurement of turbidity, chromaticity, etc. of the fluid, and in this case there is no concern about the outflow of the fluid.
82 is unnecessary.

Furthermore, for example, the device shown in FIG.
As shown in the figure, it is fixed to a side wall 101 of an open water channel 100 such as an agricultural water supply by using a mounting tool 102 to measure turbidity or chromaticity of a fluid such as water flowing through the open water channel 100. It may be used. In this case, since the measurement accuracy may be deteriorated due to contamination by muddy water or the like, the detection unit 26 (especially the liquid contact unit 47 in FIG. 4 and the like) is washed in relation to the detection unit 26. If a cleaning device (not shown) is provided for this purpose, the maintenance becomes easy, and good measurement is possible even when the measurement is performed permanently and the measurement is performed for a long period of time. As the above-mentioned cleaning device, for example, a device for intermittently cleaning with a water flow using a pump or the like, a device for cleaning with ultrasonic waves, or a detector 2 using a solenoid or the like is used.
It is possible to apply, for example, a device that vibrates 6 to perform cleaning.

Furthermore, in each of the above-described embodiments, the case where the turbidity or chromaticity of water is measured has been described as an example, but the present invention is the turbidity or chromaticity of liquids other than water or other fluids. It can be easily applied to the measurement of.
Various other design changes can be made without departing from the scope of the present invention.

<Effects of the Invention> As described above, according to the turbidity / chromaticity measuring device of the present invention, the insertion core of the elongated portion provided with the detection unit for measuring the turbidity, chromaticity, etc. The measurement of turbidity, chromaticity, etc. is achieved by inserting the above into the above-mentioned pipeline through a branch passage already installed in the pipeline through which the fluid to be measured flows, so that the measurement can be performed easily. become. In addition, the whole is compact and integrated, and there is no need for a gantry or the like for installation, so that it is easy to carry and the labor for installing the device can be reduced. In addition, since the detector is inserted into the pipe, no configuration is required for collecting and draining fluid, and the insertion core is inserted using the existing branch passage, so Therefore, the cost can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing the basic structure of an embodiment of the present invention, FIG. 1A is a plan view of a stopper ring 29, and FIG. 2 is a partial structure of the embodiment shown in FIG. Enlarged front view, FIG. 3 is a side view thereof, FIG. 4 is a cross-sectional view taken along section line IV-IV of FIG. 2, and FIGS. 7 is a conceptual diagram showing the arrangement of the container, FIG. 7 is a conceptual diagram showing an example of use, FIG. 8 is a conceptual diagram showing the basic configuration of another embodiment of the present invention, and FIG. 9 is its water stop part. 82 is a cross-sectional view showing the configuration, FIG. 10 is a conceptual view showing its usage example, FIG. 11 is a cross-sectional view showing a simplified usage state in an open water channel, and FIG. 12 is a conventional technique for measuring turbidity. It is a conceptual diagram which shows the structure of. 21 ... Joint part, 22 ... water stop part, 23 ... insertion core,
26 ... Detection part, 37 ... Flow hole, 41A, 41B ...
Turbidity / Chromaticity light source, 44A, 44B ... Transmitted light receiving element, 45A, 45B ... Scattered light receiving element, 48A, 4
8B ... Ultrasonic flow velocity sensor, 49 ... Conductivity detector, 5
0 ... Light source for illumination, 51 ... Objective lens, 62 ... Air valve, 61 ... Water pipe, 81 ... Insert core, 82 ... Water stop part, 91 ... Water pipe, 93 ... Fire hydrant, 95 ...... Water inlet

Claims (6)

[Claims] 1. A measuring device for measuring turbidity, chromaticity, etc. of a fluid flowing in a pipe, which comprises a joint part joined to a branch passage provided with valves already installed in the pipe. A long insertion core that is inserted into the conduit through the joint and the branch passage, and a turbidity / chromaticity light source that is disposed at the tip of the insertion core and that illuminates the fluid. A turbidity / chromaticity etc. characterized by comprising a detector having a light receiving element for scattered light for receiving light scattered in the fluid out of the light from the turbidity / chromaticity light source. Measuring device. 2. The turbidity / chromaticity measuring device according to claim 1, wherein the insertion core has flexibility. 3. The detection section has a flow passage for circulating the fluid, and the turbidity / chromaticity light source and a pair of transmitted light receiving elements are arranged with the flow passage interposed therebetween. The light receiving element for scattered light is arranged facing the flow passage in a direction intersecting a path of light from the turbidity / chromaticity light source. Measuring device for turbidity, chromaticity, etc. described. 4. The turbidity / chromaticity measuring device according to claim 1 or 2, wherein the detecting portion includes a flow velocity sensor for detecting a flow velocity of the fluid in the conduit. 5. The measurement of turbidity, chromaticity, etc. according to claim 1 or 2, wherein the detection section includes a conductivity detector for detecting the conductivity of the fluid in the conduit. apparatus. 6. The insertion core accommodates an image fiber for transmitting an image, and a light source for illumination and an image of an area illuminated by the light source for illumination are provided at the tip of the insertion core. The turbidity / chromaticity measuring device according to claim 1 or 2, wherein an objective lens for forming an image is provided at one end of the fiber, and the fiber can be used as an endoscope.