JP3967808B2 - Water quality measuring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water quality measuring device suitable for use in water quality surveys of rivers, lakes, and the sea, and in water quality management in aquaculture and liquid culture.
[0002]
[Prior art]
There are many items to measure water quality, such as dissolved oxygen, conductivity, redox potential, hydrogen ions (hereinafter referred to as pH), various ions other than pH (such as chloride ions and fluoride ions), and turbidity. Thus, the water temperature and water depth at the time of measurement, and also the salinity concentration and density calculated based on the conductivity are measured.
[0003]
Performing these measurements individually with a dedicated measuring device complicates the work in addition to the cost problem. Therefore, the present applicant has already determined the conductivity, which is a basic indicator of water quality, and this conductivity. We propose a water quality measurement device that can measure the total of six items of salinity, pH, turbidity, dissolved oxygen, and water temperature calculated based on the rate, and memorize the measured values. .
[0004]
In this case, when measuring various ions other than pH and the oxidation-reduction potential, it is necessary to prepare a dedicated device for the measurement and to prepare a density meter for measuring the density, and to perform each measurement.
[0005]
In addition, for measuring water quality at a predetermined water depth, a scale with a suspended holding cable of a water quality measuring device or a measure equipped with a sinking weight was prepared, and the water depth was confirmed visually. Above, various water quality measurements had to be performed, and the measurement operation was complicated.
[0006]
Therefore, in addition to the above six measurements, we have developed a water quality measuring device that can measure various ions other than the oxidation-reduction potential and pH, water depth, and density.
[0007]
At this time, a pressure gauge is provided in the sensor body as a water depth measuring chip, and a thermometer is integrally provided in the conductivity measuring chip, and the conductivity measuring chip, pH measuring chip, and various ions other than pH are provided. Each of the measurement chip, oxidation-reduction potential measurement chip, dissolved oxygen measurement chip, and turbidity measurement chip can be detachably connected to the sensor body via a connector to facilitate maintenance of various chips. I was able to do it.
[0008]
In addition, the number of connectors for chip connection is reduced, and the three types of measurement chips for pH, oxidation-reduction potential, and various ions other than pH are connected to the sensor body in an interchangeable manner. In order to identify which of the three types of measurement chips is connected to the sensor body in any of the water quality measurement devices, a measurement circuit connector is used as a connector for the signal circuit. A 4-pole type connector in which 2 poles for chip identification are added to 2 poles is used.
[0009]
For the conductivity measuring chip, the conductivity is measured by the four-electrode method, and the measuring chip is integrally provided with a thermometer. A connector is used.
[0010]
On the other hand, as a connector used for a dissolved oxygen measuring chip, a two-pole type connector for anode and cathode may be used. For example, a three-pole type connector is prepared for measurement of carbon dioxide gas or residual chlorine. Is used.
[0011]
[Problems to be solved by the invention]
Here, the various connectors described above are composed of a connector portion having connector pins having a predetermined number of poles and a connector portion having pin receptacles corresponding to the number of poles. The 3-pole type connector part used may be erroneously connected to the 6-pole type connector part used for the conductivity measuring chip. In some cases, connection to a 4-pole type connector portion used in a measurement chip such as the above is erroneously connected.
[0012]
[Means for Solving the Problems]
In view of such circumstances, the present invention has an object to provide a water quality measuring device that can reliably avoid erroneous connection between connectors having different numbers of poles by simple improvement, and the technology taken by the present invention for that purpose. The target means are as follows.
[0013]
That is, in the water quality measuring device of the present invention, the conductivity measuring chip integrally provided with the thermometer, the oxidation-reduction potential or various ions measuring chip, and the dissolved oxygen measuring chip have different numbers of poles. In the water quality measuring device detachably connected to the sensor body via the connector, each connector has a pin receiving embedded portion having a flat surface and a pin receiving embedded portion having a flat surface and the remaining half of the connectors. The sensor body side connector part formed by setting the pin protruding part that protrudes along the flat surface of the pin receiving embedded part, and the connector pin and the pin holder in the sensor body side connector part are phased. The pin receiving embedded portion for embedding half the pin receivers of the connector poles and the remaining half of the connector pins in the flat portion of the pin embedded portion. It consists of a connector part on the measuring chip side that is formed in the same shape as the connector part on the sensor body side, with a set of pin protruding parts that protrude along the surface, and a flat surface of the pin receiving embedded part in both these connector parts when what is moved relatively both connector portion in contact with the connecting direction, movement to and from the connector pin tip of the distal end surface and the other connector portion of the pin receiving embedded portion of the one connector part with contact It is characterized in that it is configured to be restrained.
In addition, each connector has a plurality of types of measurement by selecting a connection mode of electrical non-connection or connection between one pole for its signal circuit and another pole for chip identification connected to the chip identification circuit. It is desirable to be configured to identify which chip is connected to the sensor body.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a water quality measuring device according to an embodiment of the present invention, and FIG. 2 is a block diagram of the water quality measuring device.
[0015]
In these figures, reference numeral 1 in the figure denotes a sensor body, which includes a power source 2, a calculation unit 3 having a memory function unit 3a, and a data logger 4 for recording the calculated measurement data in time series. It is built in the watertight case 5.
[0016]
6A is a water depth measuring chip that measures the water depth based on detection of water pressure, for example, a pressure gauge, and is embedded in the sensor body 1. 6B is a conductivity measuring chip, which calculates a salinity concentration and a density based on the conductivity, and is integrally provided with a thermometer 7.
[0017]
6C is a turbidity measuring chip, 6D is a dissolved oxygen measuring chip, and the conductivity measuring chip 6B and the turbidity measuring chip 6C are connected via a 6-pole type connector 8A and the dissolved oxygen The measurement chip 6D is detachably connected to the sensor body 1 via a three-pole type connector 8B.
[0018]
6E is a pH measuring chip in which a comparative electrode and a glass electrode are combined, 6F is a redox potential measuring chip, 6G is a measuring chip for chloride ions other than pH, for example, and the ion measuring chip other than pH includes the above-mentioned In addition to the chloride ion measurement chip 6G, the fluoride ion measurement chip 6H, the nitrate ion measurement chip 6I, the calcium ion measurement chip 6J, the cyan ion measurement chip 6K, and the sulfide ion measurement Chip 6L, iodine ion measurement chip 6M, bromine ion measurement chip 6N, copper ion measurement chip 6P, cadmium ion measurement chip 6Q, lead ion measurement chip 6R, and thiocyan ion measurement chip 6S And a silver ion measuring chip 6T.
[0019]
The measurement chips 6G to 6T, the pH measurement chip 6E, and the oxidation-reduction potential measurement chip 6F are connected via a four-pole type connector 8C in which two poles for chip identification are added to two poles for a signal circuit. Are connected to the connector portion on the sensor body 1 side so as to be interchangeable, and all of the measurement chips 6A to 6T are connected to the sensor body 1 so that the response portion contacts the water in a submerged state. The
[0020]
Reference numeral 9 denotes a display device, in addition to the display 10 for displaying water quality measurement data and the like, a power key 11, a function key 12, a measurement start / end key 13, a calibration key 14, a select key 15, and up / down keys 16, 17 The display device 9 and the sensor body 1 are connected by a waterproof communication cable 18 that also serves to suspend and hold the sensor body 1.
[0021]
In the water quality measuring apparatus having the above configuration, when the sensor main body 1 is submerged by operating the communication cable 18, measurement data based on outputs from various measurement chips is stored in the memory function unit 3 a and the measurement value is stored in the display 10. Is displayed.
[0022]
Further, by arbitrarily operating the data acquisition switch S of the data logger 4 with the function key 12, the measurement data is logged in the data logger 4, except for dissolved oxygen, conductivity, redox potential, pH, pH It is possible to measure the water quality of the total 10 items of the various ions, turbidity, water temperature, water depth at the time of measurement, and salinity concentration and density calculated based on the conductivity with high accuracy.
[0023]
And various water quality measurement data and the water depth measurement data at the time of the water quality measurement can be accurately related to each other and called from the memory function unit 3a. Data can also be printed.
[0024]
Here, the connectors 8A to 8C for chip connection are different in the number of connector poles provided in them, but are structurally the same, for example, a four-pole type connector including two poles for chip identification. 8C is configured as shown in FIG.
[0025]
That is, of the four connector poles by the connector pin 20 and the pin receiver 21, a half of the two connector pins 20 and the remaining two pole connector 21 are set as a set, and this is connected to the connector portion 22 on the sensor body side. The connector part 23 on the measurement chip side is phase-matched with the connector pin 20 and the pin receiver 21 in the connector part 22 on the sensor body side, so that the pin receiver 21 with half two poles and the remaining two poles are formed. The connector pins 20 are molded as a set .
[0026]
More specifically, each of the connector portions 22 and 23 includes a pin receiving embedded portion 22a and 23a having a flat surface 22c and 23c embedded in the pin receiver 21, and the flat surfaces 22c and 23a of the pin receiving embedded portions 22a and 23a. The protrusions 22b and 23b projecting the connector pin 20 along the line 23c are formed in the same shape, and the connector parts 22 and 23 are in phase with each other in the pin receiver 21 and the connector pin 20. It is molded to fit .
[0027]
As shown in FIG. 4, the 6-pole type connector 8A has, for example, a half 3 pole connector pin 20 and the remaining 3 pole pin receiver 21 as a set, and these are molded into the connector portions 22 and 23. As shown in FIG. 5, the three-pole type connector 8 </ b> B has, for example, a half-pole connector pin 20 and a remaining one-pole pin receiver 21 as a set, and these are molded in the connector portions 22 and 23.
[0028]
Therefore, according to the above configuration, when the flat surfaces 22c and 23c of the pin receiving embedded portions 22a and 23a in both the connector portions 22 and 23 are brought into contact with each other and moved relatively in the connecting direction , one connector portion 22 Both connector portions 22 and 23 are brought into contact with the tip end surface 22d (or 23d ) of the pin receiving embedded portion 22a (or 23a) of (or 23) and the tip of the connector pin 20 of the other connector portion 23 (or 22). movement would be restrain mutually, thereby, it is of misconnection and the connector portion 22, 23 having different numbers of poles can be reliably prevented.
[0029]
As shown in FIGS. 6A to 6C, in each of the four-pole type connectors 8C, the two poles a and b for the signal circuit are electrically connected to the arithmetic unit 3 for chip identification. The two poles c and d are not electrically connected to the chip identification circuit A at the connector portion 23 on the chip side, or the two poles c and d and one pole (for example, the ground pole) b for the signal circuit. The memory of the calculation unit 3 indicates which measurement chip (6E or 6F or 6G to 6T) of various ions other than the pH, the oxidation-reduction potential, and the pH is connected to which connector portion 22. It is made to memorize | store in the function part 3a, and the water quality measurement data by the connected chip | tip is displayed on the display 10. FIG.
[0030]
Specifically, four connection modes can be taken by electrically disconnecting or connecting the above three poles b, c, and d. Of these, any three connection modes are arbitrarily selected. For example, in the connector portion 23 provided on the pH measurement chip 6E side, the two poles c and d for chip identification are opened with respect to one pole b for signal circuits, and two poles for chip identification are used. The connection mode (see FIG. 6A) in which c and d are short-circuited is selected.
[0031]
In the connector portion 23 provided on the oxidation-reduction potential measuring chip 6F side, a connection mode in which all of the signal circuit 1 pole b and the chip identification 2 poles c and d are short-circuited (see FIG. 6B). ] Is selected.
[0032]
In the connector portion 23 provided on the measurement chips 6G to 6T side of various ions other than pH, a connection mode in which all of the signal circuit 1 pole b and chip identification 2 poles c and d are opened [FIG. (See (C)) is selected, and the three types of measurement chips 6E, 6F, 6G to 6T to be connected are identified by the chip identification circuit A.
[0033]
Based on this chip identification information, which measurement chip (6E or 6F or 6G to 6T) is connected to which connector portion 22 of the sensor body 1 is stored in the memory function unit 3a of the calculation unit 3, The water quality measurement data by each measurement chip is displayed on the display 10.
[0034]
As shown in FIG. 7, when the three types of measuring chips 6E, 6F, 6G to 6T are selectively connected to one 4-pole type connector 8C, the water quality measuring device is made compact. Selects three connection modes from among the four connection modes described above to identify the three types of measurement chips 6E, 6F, 6G to 6T to be connected, and based on the identification information, the sensor body 1 Each of the three measurement chips (6E, 6F, or 6G to 6T) is alternatively stored in the memory function unit 3a of the calculation unit 3, and each of the measurement chips is connected. It is only necessary to display the water quality measurement data by the display 10.
[0035]
【The invention's effect】
As described above, the present invention is a pin having a flat surface in which half of the pin holders of the connector poles are embedded as connectors with different numbers of poles for connecting a plurality of types of measuring chips used for water quality measurement to the sensor body. A connector part on the sensor body side formed by setting a pin protruding part that protrudes the receiving embedded part and the remaining half of the connector pins along the flat surface of the pin receiving embedded part, and a connector part on the sensor body side A pin receiving embedded portion in which half of the connector pins of the connector pole are embedded so as to be in phase with the connector pin and the pin receiving portion, and a pin protruding portion that protrudes the remaining half of the connector pins along the flat surface of the pin embedded portion. A connector part on the measuring chip side that is formed in the same shape as the connector part on the sensor body side. When moved relatively both connector portion by contacting the flat surface each other of the pin receiving buried portion in these two connector portions in the connection direction, of the distal end surface and the other connector portion of the pin receiving embedded portion of the first connector portion connector pin and the tip is prevented abutment and configured misconnection each other connector part of the different number of poles by the use of those to be moved check to each other is, a misconnection of different connectors number of poles from each other It can be avoided reliably .
[Brief description of the drawings]
FIG. 1 is a perspective view of a water quality measuring device.
FIG. 2 is a block diagram of a water quality measuring device.
FIG. 3 is a perspective view showing a separated state of a 4-pole type connector.
FIG. 4 is a perspective view showing a separated state of a 6-pole type connector.
FIG. 5 is a perspective view showing a separated state of a three-pole type connector.
6A to 6C are explanatory diagrams showing three connection modes arbitrarily selected from four connection modes. FIG.
FIG. 7 is a block configuration diagram of a water quality measuring apparatus according to another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Sensor main body, 6B ... Conductivity measuring chip, 6D ... Dissolved oxygen measuring chip, 6E, 6G-6T ... Various ion measuring chip, 6F ... Redox potential measuring chip, 7 ... Thermometer, 8A-8C ... Connector, 20... Connector pin, 21.

Claims (2)

A conductivity measurement chip with an integrated thermometer, a redox potential or various ion measurement chip, and a dissolved oxygen measurement chip can be connected to the sensor body via connectors with different numbers of poles. In the water quality measuring apparatus, the connector includes a pin receiving portion having a flat surface and a pin receiving portion having a flat surface and a remaining connector pin along the flat surface of the pin receiving portion. The connector part on the sensor body side, which is formed by setting the protruding part of the pin to be projected, and the pin receiving part of the connector pole in phase with the connector pin and pin receiver in the connector part on the sensor body side Set the pin receiving part that embeds the pin and the protruding part that protrudes the remaining connector pin along the flat surface of the pin burying part. The connector part on the measuring chip side is formed in the same shape as the connector part on the sensor body side, and the flat surfaces of the pin receiving embedded parts in these connector parts are brought into contact with each other so that the two connector parts are relative to each other in the connecting direction. when to move, and characterized in that the connector pin tip of the distal end surface and the other connector portion of the pin receiving embedded portion of one connector portion is configured to be moved restraint with each other abut Water quality measuring device. Each of the connectors has a plurality of types of measurement chips by selecting a connection mode of electrical non-connection or connection between one pole for its signal circuit and another pole for chip identification connected to the chip identification circuit. The water quality measuring apparatus according to claim 1, wherein the water quality measuring apparatus is configured to identify which one is connected to the sensor body.

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