JPH07128172A - Pressure detection pipe-supporting mechanism and measuring apparatus for specific weight, level and temperature of liquid - Google Patents

Abstract

PURPOSE:To obtain a pressure detection pipe support mechanism which allows the elimination of errors in a pressure value caused by an inclination under fixed conditions by arranging a thin support member and a pressure detection pipe mounted securely thereon and the providing of the pressure detection pipe being allowed to set even in a very small housing space. CONSTITUTION:As a liquid storage device is inclined to the side of an end part 129, a liquid pressure applied on the end parts 129 and 131 varies. When with an angle of inclination within an allowable range, changes in the liquid level at the end parts 129 and 131 are within an allowable range (for example, within + or -2mm). the changing portion of the liquid pressure attributed to the inclination cancel each other. As a result, an air pressure which will be applied to an opening 123 corresponding to the liquid pressure entering into the individual end parts 129 and 131 becomes almost equal to that to be applied to the opening 123 when the liquid storage device is put horizontal. A thin support member 101 is made so thin as to allow the housing thereof into a narrow gap while a pressure detection pipe 103 can be supported. If this requirement is met, any shape and structure may be employed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a pressure detecting tube supporting mechanism and a liquid specific gravity, liquid level height and liquid temperature measuring device,
In particular, the specific gravity of the electrolytic solution of a storage battery such as a lead storage battery, a pressure detection tube support mechanism suitable for detecting the liquid level height, and this pressure detection tube support mechanism, the specific gravity of the electrolyte solution, the liquid level height The present invention relates to a specific gravity of liquid, a liquid level height, and a liquid temperature measuring device suitable for measuring the liquid temperature and the liquid temperature.

[0002]

2. Description of the Related Art Generally, a device for remotely measuring the specific gravity, liquid surface height and liquid temperature of an electrolytic solution of this type of storage battery is a hydrometer,
It is equipped with a liquid level gauge and a thermometer.
The liquid level gauge and the thermometer each have a sensor section and a signal conversion section. Conventionally, in the above-described specific gravity meter and liquid level gauge, each sensor unit is configured by a differential pressure pipe, and each signal conversion unit is configured by a water column manometer.

Each of the sensor units outputs air pressure (differential pressure), and each of the signal conversion units is configured to display the air pressure (differential pressure) output from each sensor unit by a scale or the like. ing. These displayed values will be sampled by direct reading by the operator.
On the other hand, in the thermometer, the sensor unit is composed of a platinum resistance temperature detector, and the signal conversion unit adopts a wide-angle resistance indicator, and the sensor unit detects the electrolyte temperature. An electric resistance value of a commensurate size is output, and the signal conversion unit is instructed to the electric resistance value. The indicated value was also sampled by direct reading by the operator's visual observation, as in the case of the specific gravity meter or the liquid level meter.

[0004]

By the way, the conventional remote measuring device having the above structure requires an air pipe and an air source for each of the differential pressure pipe of the hydrometer and the differential pressure pipe of the liquid level gauge.
Further, since the thermometer requires wiring and a power source for applying a predetermined voltage to the platinum resistance temperature detector, the number of parts must be increased.

On the other hand, the signal converter of the above-mentioned specific gravity meter and liquid level gauge is large and heavy, its structure is complicated and it is easy to cause various troubles, and the operation of the scales attached to the signal converter is complicated. The drawback is that Moreover, since the above-mentioned differential pressure value is obtained by so-called manual calculation, it takes a great deal of work, and in some cases, a calculation error may occur.

Therefore, various improvement proposals have been made for the purpose of eliminating the above-mentioned drawbacks.

The telemetry device according to the first improvement proposal is an improvement in the signal converter of each measuring instrument such as a hydrometer.

The remote measuring apparatus according to the second improvement proposal is an improvement in the sensor section of each measuring instrument such as a hydrometer and the signal converting section of each measuring instrument except the thermometer.

However, the device according to the first improvement proposal requires an air pipe and an air source for each of the differential pressure pipe of the hydrometer and the differential pressure pipe of the liquid level gauge as in the conventional case, and the thermometer is wired. Since the power supply and the power supply are required, the drawback of increasing the number of parts cannot be eliminated. Also, since the signal converter of the above-mentioned specific gravity meter and liquid level gauge adopts an electronic differential pressure gauge, it can be made smaller and lighter, but the pressure transducer of the electronic differential pressure gauge is connected by bonding. There are many parts that are vulnerable to corrosive gas or corrosive liquid, such as those where polyester, silicone, glass, epoxy adhesive, etc. are adopted. Therefore, there has been a problem that the specific gravity meter and the liquid level meter cannot be used in a storage battery in which a corrosive liquid such as sulfuric acid is used as an electrolytic solution.

On the other hand, the device according to the second improvement proposal can measure only the specific gravity of the electrolytic solution in the upper part of the storage battery. In an optical sensor or the like, various impurities floating in the electrolytic solution adhere to the mirror surface. There is a problem that it is not suitable for long-term use, it is difficult to make an explosion-proof structure, etc., because a measurement error occurs due to soiling the mirror surface, so the mirror surface needs to be cleaned frequently. .

Therefore, in order to solve the above-mentioned problem, a measuring device using the improved differential pressure tube according to the first improvement proposal as a sensor for a hydrometer and a hydrometer is newly provided. was suggested. The sensor unit of the hydrometer and liquid level gauge is composed of a plurality of differential pressure pipes having spiral ends, and the signal conversion unit of the hydrometer and liquid level gauge is a differential pressure pipe. It consists of a number of pressure transducers mounted and fixed. Each differential pressure pipe is made of a corrosion resistant resin material. In addition to the hydrometer, the measuring device includes a thermometer including a resistance temperature detector and a bridge circuit, and a signal processing unit including electronic circuit devices such as a microcomputer. The electric signal output from each of the transducer and the thermometer was configured to be processed by the signal processing unit.

The device according to this proposal can be applied in an environment in which corrosive gas or corrosive liquid is used, and can realize simplification of structure, downsizing, weight saving, and explosion-proof structure, There are various advantages that the measurement error is small and the maintenance is easy.

However, in the differential pressure tube having the above structure, when the storage battery is placed in an inclined state and the electrolytic solution moves, the distance between two points for sampling the liquid pressure is such that the storage battery is placed in a substantially horizontal state. Since the value is different from the distance, an error occurs between the differential pressure value detected in the tilted state and the differential pressure value when placed in a substantially horizontal state. Therefore, the specific gravity of the electrolytic solution will be calculated based on the differential pressure value including this error.Therefore, the specific gravity of the electrolytic solution can be accurately measured when the storage battery is tilted. There was a problem that it was not there.

Further, in order to use the differential pressure pipe having the above-mentioned structure as a specific gravity sensor, it is necessary to set a void portion for accommodating the spiral end portion in the storage battery. However, the void portion is obtained in the storage battery. Is quite difficult due to the structure of the electrode group,
Therefore, the above device was not practical.

Further, the shape and the like of the differential pressure pipe may change due to external factors, and the distance between two points for sampling the hydraulic pressure may have a value different from the initial distance.

Further, since a long differential pressure pipe cannot be adopted due to the structural limitation of the storage battery, the differential pressure detected by the specific gravity sensor becomes a small value, so that the specific gravity sensor outputs it as a differential pressure detection signal. The value of the applied voltage also becomes small, which makes it more likely to be affected by disturbances and the like, and the accuracy of detecting the differential pressure may decrease.

Therefore, the first object of the present invention is to sample the hydraulic pressure by changing the shape and the like due to external factors.
When the distance between the points does not have a value different from the initial distance and the inclination angle of the liquid container in which the liquid to be measured is contained is within a preset range, it is caused by the inclination. (EN) A pressure detection tube support mechanism provided with a pressure detection tube having a configuration capable of eliminating an error in a pressure value caused by the movement of a liquid to an inclined side and being installable even in a small accommodation space.

A second object of the present invention is to eliminate the error in the differential pressure value caused by the movement of the liquid to be measured due to the inclination when the inclination of the liquid container is within a predetermined range. It has a support mechanism with a pressure detection tube that can detect relatively large differential pressure, and can be applied in an environment where corrosive gas or liquid is used. (EN) Provided is a liquid specific gravity, liquid level height, and liquid temperature measuring device which can be made compact, lightweight, and have an explosion-proof structure, and which can be easily maintained.

[0019]

In order to achieve the above object, a first aspect of the present invention is a thin wall member fixedly inserted into a narrow space in a liquid container in a state of being immersed in the liquid. Pressure applied to the thin-walled support member with the first end and the second end positioned at two positions separated from each other by a predetermined length of the thin-walled support member. A detection tube, and a first end portion of the pressure detection tube is formed with an opening in which the pressure / electrical signal converting means is provided,
The second end portion of the pressure detection pipe is connected to a branch pipe that intersects the pressure detection pipe body in a substantially inverted T shape, and both end portions of the branch pipe hang down by a predetermined length, Each of the hanging tip portions is open.

In order to achieve the above object, a second aspect of the present invention is to detect a specific gravity, a liquid surface height and a liquid temperature of the liquid respectively by being immersed in the liquid in the liquid container and to determine a predetermined value. And a monitoring unit that performs signal processing based on the output from the detection unit, and the detection unit is a difference between any two points at a predetermined depth interval in the liquid. A first differential pressure detection unit that detects a pressure and outputs an electric signal corresponding to the differential pressure, a liquid pressure at a position submerged in the liquid, and an atmospheric pressure at a position separated from the position by a predetermined height. A second differential pressure detection unit that detects the differential pressure and outputs an electric signal corresponding to the detected differential pressure; a liquid temperature detection unit that detects the liquid temperature and outputs an electric signal corresponding to the liquid temperature; And the first differential pressure detection unit is a pair of pressure detection pipe support mechanisms, each of which has pressure detection pipes of different lengths. A pressure detecting tube supporting mechanism according to any one of claims 1 to 5, and a pressure for outputting an electric signal according to a pressure difference applied to the first end of each pressure detecting tube supporting mechanism. / Electric signal converting means, and the second differential pressure detection unit is configured such that the second differential pressure detection unit has end portions to which the hydraulic pressure and the atmospheric pressure are respectively applied, and a differential pressure between pressures applied to these end portions. A pressure detection tube having a portion to which is applied, and a pressure / pressure which outputs an electric signal according to the differential pressure applied to the portion.
And a liquid temperature detecting portion, which is a portion of one of the pressure detecting pipes included in the first and second differential pressure detecting portions, which is constantly immersed in the liquid when measuring the differential pressure. It is configured to be attached and fixed to.

[0021]

In the first aspect of the present invention, when the liquid container tilts, the thin support member also tilts accordingly. The liquid contained along with the inclination of the liquid container also moves toward the inclined side. Along with this movement, the liquid container is brought into a substantially horizontal state from the opening at the end of the branch pipe that forms the second end of the pressure detection pipe, at the hanging end of the branch pipe. The liquid will infiltrate with a slightly higher liquid level than when it is placed. On the other hand, on the contrary to the above, at the tip of the branch pipe forming the second end of the pressure detection pipe at the other end, the liquid container is in a substantially horizontal state from the opening. The liquid will infiltrate at a slightly lower liquid level than when it is placed in.

If the inclination angle of the liquid container is within a preset allowable range, the increase in the liquid level at the tip of the inclined end and the other end are drooping. It is approximately equal to the decrease in the liquid level at the tip. Therefore, the pressure error caused by the inclination is canceled from the pressure applied to the first end portion of the pressure detection tube, so that the pressure when the liquid container is placed in a substantially horizontal state is canceled. A pressure of approximately the same magnitude as is applied to the pressure / electrical signal converting means.

In the second aspect of the present invention, by immersing the pair of pressure detection tube support mechanisms of the first differential pressure detection unit in the liquid in the liquid container, the pressure detection with different lengths is performed. Different amounts of hydraulic pressure are applied to the second ends of the tubes. On the other hand, the atmospheric pressure corresponding to the liquid pressure is applied to the first end of each pressure detection tube.

In this way, the atmospheric pressure difference generated between the pair of pressure detection tubes is the hydraulic pressure applied to the second end of the longer pressure detection tube and the second pressure of the shorter pressure detection tube. Is applied to the pressure / electrical signal converting means of the first differential pressure detecting portion as a differential pressure with respect to the hydraulic pressure applied to the end portion of the electric pressure, and an electric signal corresponding to the differential pressure is monitored from the pressure / electrical signal converting means. Output to the department.

On the other hand, by immersing one end of the pressure detecting tube of the second differential pressure detecting unit in the liquid, the liquid pressure is applied to this end, and the other end exposed to the outside of the liquid. A differential pressure from the atmospheric pressure applied to the end is applied to the site. This differential pressure is applied to the pressure / electrical signal converting means of the second differential pressure detecting portion, and the electric signal corresponding to the differential pressure is output from the pressure / electrical signal converting means to the monitoring portion.

In this way, when electric signals are output from the first and second differential pressure detection units, the monitoring unit inputs these electric signals. Then, the monitoring unit also inputs the liquid temperature detection signal output from the liquid temperature detection unit, and executes predetermined signal processing according to a preset algorithm.
If the inclination angle of the liquid container is within the allowable range, the pressure generated due to the inclination from the pressure applied to the pressure / electrical signal conversion means of the first differential pressure detection unit is generated for the reason described above. Since the error is canceled, the electric signal including the error is not output from the first differential pressure detection unit to the monitoring unit.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a view showing a pressure detecting tube supporting mechanism according to an embodiment of the present invention. As shown in FIG. 1, the pressure detection tube support mechanism includes a thin support member 101 and a pressure detection tube 103.

The thin-walled support member 101 is made of a known corrosion-resistant resin material (for example, acrylic), and its thickness is set so as to match the void in the liquid container to be used. It is molded by a molding machine. As shown in FIG. 1, the thin-walled support member 101 includes a substantially rectangular frame body 105 and a plurality of arms 107 to 115 integrally formed with the frame body 105 to support the frame body 105. ing. Reference numeral 107 indicates a long arm,
The long arm 107 has a pressure detection tube introducing portion 121 protruding upward from the frame body 105 in FIG. 1, and extends downward in FIG. 1 along a long portion of the frame body 105. ing. Reference numerals 109 to 113 denote short arms, respectively, and these short arms 109 to 113 extend in the lateral direction of FIG. 1 in a state substantially orthogonal to the long arm 107. Further, reference numeral 115 indicates an inclined arm, and the inclined arm 115 includes the long arm 107 to the short arm 11.
3, the base portion 11 of the frame body 105 located in the lower part of FIG.
It extends diagonally toward 7. The pressure detection tube introducing portion 121 is provided on the assumption that the pressure detection tube support mechanism according to the present embodiment is used for a storage battery, and is shown in FIG. 1 due to the restrictions imposed by the structure inside the storage battery. It is shaped like this.

The thin-walled support member 101 has a guide hole 108 having a substantially rectangular cross section.
The overall shape viewed from the front and back direction in FIG. 1 is set to have a substantially fishhook shape. The guide hole 108 is for inserting a pressure detection pipe 103 described later, and extends along the inclined arm 115 from the protruding portion of the long arm 105 (that is, the pressure detection pipe introduction portion 121) which is an opening. And descends, and at the base 117, the long arm 1 is curved in a substantially U shape.
It is growing toward 05. The guide hole 108 communicates with large-diameter branch holes 125 and 127 that branch from the guide hole 108 into a substantially T-shape at the upper part of the base 117. Guide hole 10
8 is, when the thin support member 101 is immersed in the liquid,
As a result, the liquid infiltrates from the pressure detection pipe introducing portion 121 side to the vicinity of the connection portion with the branch holes 125 and 127.
The branch holes 125 and 127 are for holding gas such as air, and each of the branch holes 125 and 127 has end portions 129 and 131 that hang down by a predetermined length. Each of these end portions 129 and 131 has an opening 13 that is open in the front-back direction of FIG. 1 for allowing liquid to enter the respective tip portions.
3, 135 are formed.

The pressure detecting pipe 103 is made of a corrosion-resistant resin so that its cross section has a substantially circular shape, and has a diameter slightly smaller than that of the guide hole 108. The guide hole 108 has a substantially fishhook shape. It is flexible so that it can be inserted along. An end portion of the guide hole 108 corresponding to the pressure detection tube introducing portion 121 is an opening portion 123 to which a pressure transducer 137 for specific gravity described later can be attached. The other end of the pressure detection tube 103 is also an opening 124. In the opening portion 124, the pressure detecting pipe 103 is provided in the vicinity of the branch holes 125 and 127, and the guide hole 108 is formed.
And the branch holes 125 and 127 are completely disconnected from each other so that the branch holes 125 and 127 can be inserted.
The communication with 127 is established. The pressure detection tube 103 is
The liquid pressure applied to the opening 124 of the liquid in the liquid container, that is, the liquid pressure of the portion of the liquid corresponding to the opening 124 is applied to the opening 123.

When the pressure detection tube support mechanism having the above-mentioned structure is immersed in the liquid attached to the predetermined position in the liquid container, the liquid passes through the openings 133 and 135 and reaches the respective end portions 129 and 131. Infiltrate. On the other hand, each branch hole 125,
127 is in a state of being filled with air or a gas such as nitrogen gas sealed from the side of the opening 123 (which is the opening of the pressure detection tube 103). If the liquid container is placed in a horizontal state, the liquid level at each end 129, 131 will be equal, but if the liquid container is tilted, the liquid level at either end will be due to this tilt. It rises and the liquid level at the other end falls.

For example, the liquid container is on the left side of FIG. 1 (ie,
Assuming that it is inclined toward the end 129 side), the liquid level on the end 129 side rises more than when the liquid container is placed in a horizontal state, and conversely, on the end 131 side. The liquid level is
Lowers than when the liquid container is in a horizontal position. As a result, the hydraulic pressure applied to the end portion 129 side becomes higher than that when the liquid container is placed in the horizontal state by the amount of increase in the liquid level, and the hydraulic pressure applied to the end portion 131 side. Is lower than that when the liquid container is placed in a horizontal state by the amount by which the liquid level is lowered. Since the inclination angle of the liquid container is within the preset range (for example, within ± 5 °), the fluctuation of the liquid level at the end portions 129 and 131 is within the preset allowable range (for example, within ± 2 mm). )
In this case, the fluctuations in the hydraulic pressure due to the inclination will be canceled by each other. Therefore, each of the end portions 12
Corresponding to the hydraulic pressure that has entered the 9, 131, the opening 123
The atmospheric pressure to be applied to is approximately equal to the atmospheric pressure to be applied to the opening 123 (which is the opening of the pressure detection tube 103) when the liquid container is placed in a horizontal state. Therefore, the atmospheric pressure including no error due to the inclination of the liquid container is applied to the transducer 137 through the opening 123.

In the pressure detecting tube support mechanism shown in FIG. 1, even if the tilt angle of the liquid container exceeds the allowable range, the liquid is immediately discharged from one of the end portions 129 and 131 by air or nitrogen gas. Branch hole 12 filled with etc.
There is no possibility of invasion to the side of 5, 127 (formed in the base 117 together with the guide hole 108). Further, even if the liquid container is a storage battery and the liquid is a corrosive liquid such as an electrolytic solution (dilute sulfuric acid), the electrolytic solution still has the branch holes 125,
The pressure detection pipe 103 side does not enter from 127 (formed in the base 117 together with the guide hole 108), and even if the liquid evaporates into a corrosive gas, the corrosive gas For upward movement, pressure detection tube 1
The transducer 137 is not adversely affected by the corrosive liquid or the corrosive gas, because the transducer 137 is regulated by the substantially U-shaped curved portion of 03.

The pressure detection tube support mechanism shown in FIG. 1 has a structure in which the thin-walled support member 105 is provided with the guide hole 108. However, the guide hole 108 is not provided, and the thin-walled support member 105 is preliminarily linear or fishhook. The pressure detection tube 103 formed in a shape may be directly attached and fixed. Further, instead of the pressure detection pipe 103 shown in FIG. 1, a branch pipe that extends linearly from the end to which the transducer 137 is attached and on which the liquid flows in is a branch pipe that intersects in a substantially inverted T shape. It is also possible to adopt a pressure detection tube which is connected to each other and has both ends hanging down by a predetermined length and having open ends.

Further, in the pressure detection tube support mechanism shown in FIG. 1, a thin support member 101, a rectangular frame body 105,
Although a plurality of arms 107 to 119 is used, any thin-walled support member 101 may be used as long as it is thin enough to be accommodated in a narrow gap and can support the pressure detection tube 103. It does not matter if the shape and the configuration are used.

FIG. 2 is a view showing a pressure detecting tube support mechanism according to another embodiment of the present invention. This pressure detection tube support mechanism sets the entire shape of the guide hole indicated by reference numeral 110 as viewed from the front and back sides in FIG. 2 so as to have a substantially L-shape, whereby the pressure detection tube 104 inserted into the guide hole 110. Is almost L
It is different from the pressure detection tube support mechanism of FIG. 1 in that it is held in a character shape. That is,
The guide hole 110 descends from the pressure detection pipe introducing portion 121 along the inclined arm 115 and is substantially L at the lower end portion of the frame body 105.
It is bent in a letter shape, extends along the lower end portion of the frame body 105 as it is, reaches the right end portion of the frame body 105 in FIG. The pressure detection pipe 104 is inserted into the guide hole 110, and the length of the pressure detection pipe 104 is set to be substantially equal to the extension of the guide hole 110. The configurations of the guide hole 110 and the pressure detection pipe 104 are substantially the same as those of the pressure detection pipe support mechanism described in FIG.

The length of the portion of the guide hole 110 extending along the lower end portion of the frame body 105 (that is, the section corresponding to the above-mentioned portion of the pressure detection pipe 104) has a length within a predetermined temperature range. The length of the pressure detection point is set so that the fluctuation of the pressure detection point due to the temperature change can be compensated and no error occurs in the pressure detection value. For example, if the environment in which the liquid container is installed is 10
If the temperature changes in the range of 50 ° C. to 50 ° C., the gas in the pressure detection tube 104 also expands or contracts in response to the temperature change, so that the liquid changes in pressure in accordance with the expansion / contraction of the gas. The depth of intrusion also fluctuates. Therefore,
If the length of the above-mentioned portion is set to be longer than the portion where the liquid penetrates deepest, the liquid does not penetrate to the rising portion of the pressure detection pipe 104, so that the pressure detection point does not change.

In this embodiment, the short arms 112 and 116 are formed in place of the base 117, and the long arm 107 is orthogonal to the short arms 112 and 116 and the frame body 1 is formed.
The structure reaches the lower end portion of 06.

FIG. 3 is a diagram showing the overall structure of a liquid, ie, the specific gravity of the electrolytic solution, the liquid level and the liquid temperature measuring device according to one embodiment of the present invention. As is apparent from FIG. 3, the measuring device includes a specific gravity sensor 23 directly housed in the storage battery 1 and a casing 1 made of a corrosion-resistant resin material.
Liquid level sensor 25 and IC temperature sensor 31 housed in
And the monitoring unit 10 connected to each of the sensors 23, 25 and 31 through a plurality of bus lines 70. The specific gravity sensor 23 includes a pair of pressure detection tube support mechanisms 100 housed in the storage battery 1 (illustration regarding the installation state of each pressure detection tube support mechanism 100 is omitted) and these pressure detection tube support mechanisms 100. The pressure detection tubes 103 provided respectively and these pressure detection tubes 1
And a specific gravity pressure transducer 137 that outputs an electric signal according to the pressure difference applied from 03.

The pair of pressure detection tube support mechanisms 100 are fixedly housed in the extremely narrow gap defined by the inner surface of the battery case of the storage battery 1 and the electrode plate group 2 while being immersed in the electrolytic solution 3. ing. The bus line 70 includes a parallel / serial converter 61 (see FIG. 7) provided in each storage battery 1.
(See) and are connected respectively. The sensors 23, 25 and 31, the parallel / serial converter 6 according to the present embodiment.
1, the bus line 70, and the monitoring unit 10 each employ an intrinsically safe explosion-proof circuit to ensure safety against explosion of hydrogen gas.

FIG. 4 shows a casing 13 in which a storage battery 1 and a pair of pressure detection tube support mechanisms 100 and a specific gravity pressure transducer 137 which constitute a specific gravity sensor 23, a liquid level sensor 25 and an IC temperature sensor 31 are housed. It is an expanded side sectional view showing a positional relationship. In FIG. 4, the pressure detection tubes 103 (or 104) respectively supported by the pair of pressure detection tube support mechanisms 100 are different from each other in FIG. 1 (or FIG. 2) except that the respective lengths are different. ) Has a structure similar to that shown in FIG. In this way, by using the pressure detection tubes 103 (or 104) having different lengths, the liquid pressure at the point P1 (see FIG. 5) in the electrolytic solution 3 and the depth h from this point P1 (h is constant). Value) The difference from the hydraulic pressure at the point P2 (see FIG. 5) in the electrolytic solution 3 at the separated position, that is, the differential pressure P is detected.
Then, based on the differential pressure P and the interval h, the specific gravity ρ of the electrolytic solution 3 is obtained as described later. Since the specific gravity pressure transducer 137 is constantly immersed in the electrolytic solution 3, it is completely protected from the electrolytic solution by a known corrosion-resistant resin material or the like.

The liquid level sensor 25 is housed in the casing 13 that hangs from the top plate of the storage battery 1 toward the upper part of the electrode group 2, and includes a pipe-shaped resin member (not shown) and a liquid level. And a pressure transducer 139 for use. The liquid level sensor 25 is a region defined by the liquid level of the electrolytic solution 3 and the upper part of the electrode group 2, and is a hydraulic pressure at a point P4 (see FIG. 5) in the electrolytic solution 3 and a point P3 outside the electrolytic solution 3.
The pipe-shaped resin member (not shown) so that the difference from the atmospheric pressure in (see FIG. 5), that is, the differential pressure P ′ can be detected.
Are positioned. Further, the IC temperature sensor 31 is completely protected from the electrolytic solution by a known corrosion-resistant resin material or the like at an appropriate position of the pipe-shaped resin member (not shown) in order to detect the temperature of the electrolytic solution 3. It is fixed in place.

Since the details of the above-mentioned structure are described in the specification relating to the patent application (Japanese Patent Application No. 4-257602) filed by the applicant of the present application, the description thereof will be omitted. In addition,
Based on the differential pressure P ′ and the specific gravity ρ, the liquid surface height h ′ of the electrolytic solution 3 (see FIG. 5) will be obtained as described later. A method of calculating the specific gravity ρ and the liquid surface height h ′ will be described later.

The reason why the specific gravity sensor 23 does not have the same structure as the liquid level sensor 25 is as follows. That is, the specific gravity sensor 23 also has a pipe-shaped resin member similarly to the liquid level sensor 25, and the liquid level sensor 25 and the IC
Assuming that the temperature sensor 31 and the temperature sensor 31 are housed in the casing 13, the range in which the specific gravity sensor 23 can measure the differential pressure is shown in FIG.
Between the liquid surface of the electrolytic solution 3 and the upper part of the electrode group 2 (about 200 mm between the top plate part of the main body of the storage battery 1 and the upper part of the electrode group 2).
Generally, between the liquid surface of the electrolyte 3 and the upper part of the electrode group 2,
This is limited to about 100 mm), and the differential pressure value detected by the specific gravity sensor 23 also becomes a small value. Therefore, the value of the voltage applied from the specific gravity sensor 23 to the monitoring unit 10 as a differential pressure detection signal also becomes small, and the output voltage from the specific gravity sensor 23 is easily affected by disturbance or the like, and the differential pressure The detection accuracy may decrease.

Therefore, by taking a large value of h only for the specific gravity sensor 23, a large differential pressure value can be measured, and a larger output voltage than before can be obtained from the specific gravity sensor 23, which is considerably larger than that of the casing 13. The long pressure detection tube support mechanism 100 is adopted.

As described above, the specific gravity pressure transducer 137 has the openings 1 of the pair of pressure detection tubes 103.
It is provided so as to face 23 and be assembled. As the pressure transducer 137 for specific gravity, for example, a diffusion type semiconductor element utilizing the piezoresistance effect is adopted. This diffusion type semiconductor element has higher reliability than the mechanical type using a bellows or a metal diaphragm which has been conventionally used, and still uses a single crystal silicon pressure sensitive element of several mm square. Therefore, it is extremely small and lightweight. The diffusion type semiconductor device is also characterized in that a highly accurate output can be obtained because it has a built-in precision temperature compensation resistor.

In the pressure transducer 137 for specific gravity, different pressures are applied from the end portions 129 and 131 due to the electrolytic solution 3 that has penetrated into the end portions 129 and 131 in the above-described manner. And an electric signal (voltage) having a magnitude corresponding to the pressure difference between these two atmospheric pressures is generated. This electrical signal is output from the specific gravity pressure transducer 137 to the amplifier 21a (shown in FIG. 7), amplified by a predetermined amplification degree, and then output to the monitoring unit 10 through the parallel / serial converter 61.

The liquid surface pressure transducer 139 is provided in an appropriate position in the above-mentioned pipe-shaped resin member (not shown) so as to be assembled so as to face the pipe-shaped resin member. As with the specific gravity pressure transducer 137, the liquid level pressure transducer 139 employs, for example, a diffusion type semiconductor element utilizing the piezoresistance effect. This diffused semiconductor device has already been described in detail, so its explanation is omitted. The liquid surface pressure transducer 139 is provided from the end portion side of the pipe-shaped resin member due to the electrolyte solution 3 that has penetrated into the pipe-shaped resin member from the end portion of the pipe-shaped resin member immersed in the electrolyte solution 3. An electric signal (voltage) having a magnitude corresponding to the pressure difference between the applied atmospheric pressure and the atmospheric pressure applied from the end of the pipe-shaped resin member exposed to the outside of the electrolytic solution 3 is generated. . This electrical signal is
Liquid pressure transducer 139 to amplifier 21b
After being output to (shown in FIG. 7) and amplified with a predetermined amplification degree, the monitoring unit 10 is passed through the parallel / serial converter 61.
Is output to.

The IC temperature sensor 31 uses an extremely small and lightweight semiconductor element of several millimeters square, and generates an electric signal (voltage) of a magnitude corresponding to the detected liquid temperature.
This electric signal is sent from the IC temperature sensor 31 to the amplifier 21c.
After being output to (shown in FIG. 7) and amplified with a predetermined amplification degree, the monitoring unit 10 is passed through the parallel / serial converter 61.
Is output to.

FIG. 6 is a block diagram showing a monitoring system of a storage battery equipped with the above measuring device. In this monitoring method, a large number of storage batteries are divided into a plurality of blocks with some storage batteries as a unit, three types of sensor information regarding each storage battery 1 are converted into serial data for each storage battery 1, and this serial data is converted into serial data. The data is transmitted from the corresponding data transmission line 7 (see FIGS. 7 and 8) of the bus line 70 to the monitoring unit 10 side at a predetermined timing in a predetermined order. With such a configuration, the signal processing unit 9 (which will be described in detail later) in the monitoring unit 10 and devices for processing the sensor information on each storage battery 1 side (the parallel / parallel unit described above).
Bus line 70 connecting to the serial converter 61)
As long as the number of blocks is the same as the number of blocks, it will be sufficient. For example, if the number of storage batteries to be monitored is 100 and one storage battery is composed of 20 storage batteries 1, the total number of blocks is 5, so the number of bus lines 70 is 5. Will be enough. Needless to say, the number of storage batteries 1 that can be monitored by the device is not limited to 100.

7 and 8 are block diagrams showing the signal processing system of the monitoring system shown in FIG. 6, and FIG. 7 shows various devices attached to the side of the storage battery 1 to be monitored, Further, FIG. 8 shows an internal configuration of the monitoring unit 10 side. The sensors 23, 25, 31, the amplifiers 21a, 21b, 21c, and the parallel / serial converters 61 in the upper two stages of FIG. 7 are provided corresponding to the storage battery 1 that constitutes the block 1 of FIG. It is equipment. Further, the lower two stages of the sensors 23, 25, 31, and the amplifiers 21a, 2 in FIG.
1b, 21c and each parallel / serial converter 61,
They are devices provided corresponding to the storage battery 1 which constitutes the block n of FIG.

As shown in FIGS. 7 and 8, the signal processing system includes the above-mentioned sensors 23, 25 and 31, the amplifiers 21a, 21b and 21c, the parallel / serial converter 61 and the monitoring section. It is composed of 10. Monitoring unit 1
Reference numeral 0 indicates a specific gravity display section 45 and a liquid level display section 4 as display means.
7, a liquid temperature display section 49, a keyboard 33, a printer 53, and a signal processing section 9.

Each of the specific gravity sensor 23 and the liquid level sensor 2 described above
5 and IC temperature sensors 31 are provided in the same number as the number of installed storage batteries 1 to be monitored, and these three types of sensors are provided in each storage battery 1 as described above (FIGS. 3 and 4). Installed). Each of the above amplifiers 21
a, 21b and 21c are provided corresponding to the sensors 23, 25 and 31, respectively, and the amplifiers 21a and 21a are
Each of 21b and 21c is installed in each storage battery 1 in the manner as described above (see FIGS. 3 and 4).
Further, each parallel / serial converter 61 is also connected to each storage battery 1
It is provided for each.

Each parallel / serial converter 61 selects the analog signals output in parallel from the corresponding amplifiers 21a, 21b and 21c of the storage battery 1 in a time-divisional manner, converts them into digital signals, and then converts them into serial data. Output as. Each parallel / serial converter 61 has
It includes a multiplexer 63, an A / D converter 65, a local CPU 67, a memory 69, and an input / output port 71. The multiplexer 63, under the control of the local CPU 67, selectively inputs the analog signals output from the amplifiers 21a, 21b, and 21c in a time division manner and outputs the analog signals to the A / D converter 65 at a predetermined timing.

The A / D converter 65 is the multiplexer 63.
The analog signal output at a predetermined timing is converted into a digital signal and output to the input / output port 71. The input / output port 71 is transmitted through the control data transmission line 8 (one for each block is provided) that connects the monitoring unit 10 and each parallel / serial converter 61 under the control of the local CPU 67. Data for time-division control is input and notified to the local CPU 67. The control data transmission line 8 constitutes a bus line 70 together with each data transmission line 7. The input / output port 71 is also A /
The digital signal output from the D converter 65 is sent to the monitoring unit 10 through the data transmission line 7 at a predetermined timing.

The memory 69 contains a control program and the like and stores necessary data. The memory 69 stores data regarding the input order of each detection signal (that is, specific gravity, liquid surface and liquid temperature detection signal) by the multiplexer 63, data regarding the input timing of each detection signal by the multiplexer 63, and the like. The memory 69 also detects the detected value of the specific gravity pressure transducer 137, that is, the differential pressure value P1e when the specific gravity of the electrolytic solution 3 is 1.00 and the differential pressure value when the specific gravity of the electrolytic solution 3 is 1.30. It also stores P3e and the like. Each of the differential pressure values described above is a differential pressure value when the height between two points in the electrolytic solution 3 is constant at h.

The memory 69 further stores the detected values of the liquid surface pressure transducer 139, that is, the differential pressure values P1e1 and P1e2 when the specific gravity of the electrolytic solution 3 is 1.00 and the specific gravity of the electrolytic solution is 1.30. Differential pressure values P3e1 and P3e2
Also remembers and. Any of the above-mentioned differential pressure values is the same as the electrolytic solution 3
The differential pressure value between the liquid pressure at a point existing inside and the atmospheric pressure at a point above this point by a certain height h ′ and above the liquid level of the electrolytic solution 3 in the storage battery 1. Is.

The local CPU 67 determines the input order and input timing of each detection signal by the multiplexer 63 based on the data stored in the memory 69, and controls the multiplexer 63. By this control, for example, the detection signal from the specific gravity sensor 23 is first passed through the amplifier 21a, and then the liquid level sensor 2 is passed through the amplifier 21b.
The detection signal from 5 finally passes through the amplifier 21c to the IC
The detection signals from the temperature sensor 31 are input by the multiplexer 63 at predetermined timings.

The local CPU 67 also determines the output timing of each digital data output from the A / D converter 65 and stored in the input / output port 71 as serial data based on the above-mentioned control signal, and inputs the digital data. It controls the output port 71. By this control, when the monitoring unit 10 notifies each local CPU 67 of the block 1 of the permission to send the serial data, the serial data corresponding to the first storage battery in the storage battery group forming the block 1 is transmitted from the m-th serial data. Up to the serial data corresponding to the th storage battery is sent from each input / output port 71 to the data transmission line 7 at a predetermined timing.

As shown in FIG. 8, the monitoring section 10 includes a signal processing section 9, a keyboard 33, a specific gravity display section 45, a liquid level display section 47, a liquid temperature display section 49 and a printer 53.

The keyboard 33 is provided with keys for outputting various command signals necessary for controlling the measuring apparatus according to the present embodiment to the signal processing unit 9 and a key group including a numeric keypad. . The key group specifies a specific storage battery 1 from a plurality of storage batteries 1 to be monitored, and displays the specific gravity, liquid level, temperature and converted specific gravity of the electrolyte solution 3 in the storage battery 1 in each of the display units 45, 47 and. Includes various keys for displaying 49. The above key group is also used for the electrolyte 3 of all storage batteries 1.
The average conversion specific gravity, average liquid surface and average temperature of
It also includes various keys for displaying 5, 47 and 49.

Command signals resulting from the operation of the various keys are output from the keyboard 33 to the main CPU 51 through the input / output port 39, and the main CPU 51 performs predetermined arithmetic processing.

The specific gravity display section 45, the liquid level display section 47, and the liquid temperature display section 49 are installed in a place where a command is given, such as a driver's cab, and the respective display sections 45, 47, 49 are, for example, LEDs.
A multi-digit 7 segment composed of (light emitting diode) elements is adopted. Each of the display units 45, 47, and 49 executes a predetermined display operation based on the display command signal output from the main CPU 51 through the output port 43.

The printer 53 also has the display units 45 and 47 described above.
Like the printers 49 and 49, the printer 53 is installed in a place for conducting a command, such as a driver's cab. Perform printing operation.

The signal processing unit 9 functions as a specific gravity value calculating means, a liquid level height calculating means, and a specific gravity value converting means.
PU51, I / O port 39, output port 43,
The memory 41 and the serial / parallel conversion circuit 55 are provided.

The input / output port 39 outputs the command signal output from the keyboard 33 to the main CPU 51 under the control of the main CPU 51. The input / output port 39, under the control of the main CPU 51, also time-divisions the digital data for each block sent in parallel from each parallel / serial converter 61 through the corresponding data transmission line 7 according to a preset order. The data is selectively input and output as serial data to the serial / parallel conversion circuit 55 at a predetermined timing. The input / output port 39 further sends the control data of each parallel / serial converter 61 output from the main CPU 51 to the control data transmission line 8 as serial data at a predetermined timing.

The serial / parallel conversion circuit 55, under the control of the main CPU 51, calculates serial data from the input / output port 39 as specific gravity sensor information, liquid level sensor information and temperature sensor information of the electrolytic solution 3 for each storage battery 1. It is converted into parallel data so that it can be processed, and is output to the main CPU 51 at a predetermined timing.

ROM / RAM memory (hereinafter, “memory”)
41 has a control program and the like and stores necessary data. The memory 41 starts data on the input order and the input timing of the detection signals from the respective sensors 23, 25 and 31 to which the respective parallel / serial converters 61 correspond, and the respective parallel / serial converters 61.
Stores data relating to the order of sending each serial data to the corresponding data transmission line 7 and the sending timing thereof. As described above, each of these data is used as data for time division control from the control data transmission line 8 (provided for each block corresponding to each data transmission line 7) to each parallel / serial converter. Sent to 61. The memory 41 also stores data regarding the order in which the input / output port 39 inputs serial data sent from each data transmission line 7 and the input / output timing thereof.

The memory 41 also includes the electrolyte 3 which will be described in detail later.
Including the formula for calculating the specific gravity ρ of the electrolytic solution 3, the formula for calculating the liquid level height h ′ of the electrolytic solution 3, and the specific gravity ρ of the electrolytic solution 3 when the liquid temperature of the electrolytic solution 3 is 20 ° C. To convert the specific gravity ρ of the electrolytic solution 3 into the specific gravity Gb when the liquid surface of the electrolytic solution 3 is a regular liquid surface, the specific gravity ρ of the electrolytic solution 3 to the liquid temperature of the electrolytic solution 3. Is 20 ° C. and the liquid surface of the electrolytic solution 3 is a normal liquid surface, the formula for converting to the specific gravity G20b and the average converted specific gravity, average liquid surface and average temperature of the electrolytic solutions 3 of all the storage batteries 1 are calculated. The formulas for each are stored.

The memory 41 also starts with the value of h indicating the distance between the ends of the pair of pressure detecting pipes 103 on the side where the branch pipe is provided, and the distance between the both ends of the pipe-shaped resin member. Various data such as a value of H ′ indicating the value of “b” or a value b indicating the normal liquid surface height of the electrolytic solution 3 inside the storage battery 1 are also stored.

The memory 41 further includes the specific gravity data of the electrolytic solution 3 in each storage battery 1 including the above-mentioned differential pressure value data output from the main CPU 51 due to the operation of the various keys described above. The liquid level data, the temperature data and the converted specific gravity data, the average converted specific gravity data of the electrolytic solutions 3 of all the storage batteries 1, the average liquid level data and the average temperature data are stored in a predetermined storage area. The memory 41 is the main CPU 5
The data read request from 1 is input and the corresponding data is output to the main CPU 51.

The main CPU 51 performs a series of arithmetic processing based on various data in the memory 41 and various external information input through the input / output port 39 (that is, various sensor information and key operation information output from the keyboard 33). I do. The main CPU 51 controls the specific gravity display section 45, the liquid level display section 47, the liquid temperature display section 49, the printer 53 and the like through the output port 43. The main CPU 51, based on the various data stored in the memory 41,
The following arithmetic processing operation is executed.

(A) The main CPU 51 sends each local CP through the input / output port 39 and each control data transmission line 8.
By sending control data for controlling U67 and controlling the input / output port 39, (a)
The specific gravity, the liquid surface height, and the liquid temperature of the electrolytic solution 3 are obtained for each storage battery 1 as described in (g) to (g).

(A) The digital data (that is, the differential pressure of the electrolytic solution 3) transmitted from each specific gravity sensor 23 to the main CPU 51 through the above-mentioned path is input, and the digital data P and the electrolytic solution 3 in the memory 41 are input. Ρ is obtained by the equation ρ = P / h for obtaining the specific gravity ρ of Here, P is the differential pressure between the pressures P2 and P1 (see FIG. 5) applied to both ends of the pair of pressure detection tubes 103 described above. h is
As described above, it is the distance between both ends and is a constant value.

(C) Digital data P '(that is, point P4 in the electrolytic solution 3 (FIG. 5) output from each liquid level sensor 25 and transmitted to the main CPU 51 through the above path.
(See Fig. 5) and hydraulic pressure at point P3 outside electrolyte 3 (see Fig. 5)
Difference from the atmospheric pressure at), and input P'and (a)
H ′ is obtained from the specific gravity ρ obtained in step 1 and the equation h ′ = P ′ / ρ for obtaining the liquid level height h ′ of the electrolytic solution 3 in the memory 41.

As is apparent from the above description and FIG. 5, one end of the pipe-shaped resin member to which the pressure P4 is applied is electrolyzed at the position of the depth h'from the liquid surface. It is immersed in the liquid 3, and P4 indicates the pressure at the above position. On the other hand, the other end of the pipe-shaped resin member to which the pressure P3 is applied is, as described above, exposed to the outside of the electrolytic solution 3 at a position h'above the one end.

The normal liquid level height b of the electrolytic solution 3 is a known number, and the mounting position of the casing 13 with respect to the storage battery 1 is fixed as shown in FIG.
The liquid level height h ′ can be calculated by the above formula.

(D) The digital data t output from each IC temperature sensor 31 and transmitted to the main CPU 51 through the above path is input. The main CPU 51
This t is the liquid temperature t when the specific gravity ρ is obtained in (a) and the liquid level height h ′ is obtained in (c).
Recognize as [℃]. That is, the main CPU 51 (a)
The specific gravity ρ obtained in step 1 is recognized as the specific gravity Gt (ρ = Gt) of the electrolytic solution 3 at the solution temperature t [° C.], and this t and the electrolytic solution 3 in the memory 41 when the solution temperature is 20 ° C. Specific gravity G20
Equation for converting into G20 = Gt + 0.0007 (t
-20) is used to find G20.

The specific gravity ρ obtained in (e) and (ii) is
It is the specific gravity at the liquid level height h'obtained in (c), not the specific gravity when the electrolytic solution 3 is the regular liquid level. Therefore, in order to convert the specific gravity ρ obtained in (a), the liquid level height h ′ obtained in (c), and the specific gravity Gb when the electrolytic solution 3 in the memory 41 is the normal liquid level. Equation of Gb = G
Gb is calculated using the equation of L + 0.0004 (b−h ′). Here, b indicates the normal liquid surface height of the electrolytic solution 3. Further, h'represents the liquid level height, which has already been (c).
Is required in. Further, GL represents the specific gravity of the electrolytic solution 3 when the liquid surface height is h ′ (this GL is represented by ρ in (a) and Gt in (d)). Furthermore, 0.
0004 is a liquid level conversion coefficient required when converting the measured liquid level of the electrolytic solution 3 into a normal liquid level.

(F) The main CPU 51 causes G2 in (d).
After obtaining the value of 0, that is, the specific gravity of the electrolytic solution 3 when the liquid temperature is 20 ° C., and the value of Gb, that is, the specific gravity of the electrolytic solution 3 when the liquid surface height h ′ is obtained in (e), Liquid temperature in memory 41: 20 ℃
And the specific gravity G2 of the electrolytic solution 3 when the liquid surface is the regular liquid surface
Formula for converting to 0b G20b = GtL + 0.00
G20b is calculated using 07 (t-20) +0.0004 (b-h ').

GtL + 0.0007 (t-20) is
Since it is obtained in (d), it is a known number (∵GtL =
Since Gt) and 0.0004 (b-h ') are calculated in (e), they are also known numbers.

In this way, the reason why the specific gravity of the electrolytic solution 3 is converted into the specific gravity when the liquid temperature is 20 ° C. and the liquid surface is the regular liquid surface is that the specific gravity of the electrolytic solution 3 changes depending on the liquid temperature and the liquid surface height. Therefore, when comparing the electrolytic solution specific gravities, it is necessary to convert the electrolytic solution specific gravity ρ obtained in (a) into the electrolytic solution specific gravity G20b at the liquid temperature of 20 ° C. and at the normal liquid surface.

(G) The main CPU 51 corrects the temperature drift of the G20b obtained in (F), if necessary. That is, the main CPU 51 uses the liquid temperature detection value t output from the IC temperature sensor 31 and the memories 69.
Differential pressure value data P1e, P3e, P1e1, P
Based on 1e2, P3e1 and P3e2, etc., the value of G20b obtained in the above (f) is corrected by performing a predetermined calculation process.

(H) The main CPU 51 uses the keyboard 3
Based on the command signal output from the storage battery 3, the average conversion specific gravity, the average liquid surface, and the average temperature of the electrolyte solutions 3 of all the storage batteries 1 are calculated.

(X) The main CPU 51 starts the value of G20b for each storage battery 1 obtained as described above, the value of h ', the value of t, and the average conversion specific gravity of the electrolytic solution 3 of all the storage batteries 1. The value, the average liquid surface value, and the average temperature value are displayed and output on the corresponding display units 45, 47, 49, or by controlling the printer 53, a hard copy from the printer 53 (a predetermined format in which the above information is printed). Output).

Next, the control operation of the above configuration will be described with reference to the flow charts shown in FIGS.

When the driving power source of the measuring device is turned on,
The main CPU 51 uses the pressure transducer 13 for specific gravity.
7, the differential pressure value P when the specific gravity of the electrolytic solution 3 is 1.00
1e and the differential pressure value P3e when the specific gravity of the electrolyte 3 is 1.30
, Is checked in each memory 69 (step S1). Along with this, the main CPU 51
Is the differential pressure values P1e1 and P1e2 when the specific gravity of the electrolytic solution 3 is 1.30 with respect to the liquid surface pressure transducer 139,
Differential pressure values P3e1 and P3 when the specific gravity of the electrolyte 3 is 1.30
It is also checked whether or not e2 is registered in each memory 69 (step S2). As a result of the above-mentioned checks in step S1 and step S2, if the above-mentioned data are not registered in each memory 69, the main CPU
Step 51 does not shift to the processing operation after step S3.
The above data in step S1 and step S2 are used for correcting the error in the value of G20b described above due to the temperature drift caused in the pressure-output voltage characteristics of the specific gravity sensor 23 and the liquid level sensor 25. Is used.

As a result of the above-mentioned checks in step S1 and step S2, if the above-mentioned respective data are registered in the respective memories 69, the main CPU 51 causes the main CPU 51 to execute the step S3.
The subsequent processing operation is performed. The main CPU 51 sends data for time division control to each local CPU 67. The control data determines the order in which the parallel / serial converters 61 input the detection signals output from the sensors 23, 25, 31. Further, the output order and output timing of the serial data formed by the detection signals from the respective parallel / serial converters 61 are also determined (step S3).

When the processing operation shown in step S3 is completed, the main CPU 51 controls the input / output port 39 in order to determine the output order and output timing of the digital data for each block from the input / output port 39. Less than,
Assuming that each digital data is output in the order of block 1 to block n by this control, the digital data first output as the sensor information of the storage battery 1 in block 1 will be described (step S).
Four). The main CPU 51 reads the differential pressure value P output from the specific gravity pressure transducer 137 (step S
5) The specific gravity ρ of the electrolytic solution 3 is calculated by reading out the expression of ρ = P / h and the value of h from the memory 41 (step S).
6).

The value of ρ calculated in step S6 is temporarily stored in the predetermined storage area of the memory 41 by the main CPU 51 (step S7). When the series of processing operations from step S5 to step S7 is completed, the process proceeds to step S8. That is, the main CPU 51 reads the differential pressure value P ′ output from the liquid surface pressure transducer 139 (step S8), and from the memory 41, h ′ = P ′ / ρ.
And the value of ρ temporarily stored in the memory 41 in step S7 are read (step S9), and the liquid level height h'of the electrolytic solution 3 is calculated (step S10). The value of h ′ calculated in step S10 is stored in the memory 4 by the main CPU 51.
1 is temporarily stored in a predetermined storage area (step S1
1). When the processing operation shown in step S11 is completed, the main CPU 51 reads the liquid temperature detection value t output from the IC temperature sensor 31 and temporarily stores it in a predetermined storage area in the memory 41 (step S12).

Specific gravity ρ of the electrolyte 3 determined in step S6
And the liquid temperature detection value t read in step S12 and the memory 4
Formula G20 = Gt + 0..g which is stored in 1 for converting the specific gravity G20 when the liquid temperature of the electrolytic solution 3 is 20 ° C.
With 0007 (t-20), the liquid temperature of the electrolytic solution 3 is 2
Calculate the specific gravity G20 at 0 ° C. The details of each term constituting the above conversion formula have already been described, and thus will be omitted (step S13). When the calculation in step S13 is completed, the main CPU 51 stores in the memory 41 the specific gravity ρ of the electrolytic solution 3 obtained in step S6, the liquid level height h ′ of the electrolytic solution 3 obtained in step S10. , Electrolyte 3
Gb is calculated using the equation Gb = GL + 0.0004 (b−h ′) for converting the specific gravity Gb when the liquid surface is a regular liquid surface. Since the details of each term constituting the above conversion formula have already been described, they are omitted (step S1).
Four).

When the calculations described in step S13 and step S14 are completed, the main CPU 51 determines the specific gravity G20b of the electrolytic solution 3 stored in the memory 41 at the liquid temperature of 20 ° C. and at the normal liquid level. Formula for conversion G20b = GtL + 0.0007 (t-20) +
0.0004 (b-h '), using the specific gravity G20
b is calculated (step S15). The G20b obtained in step S15 is subjected to the temperature drift correction as described above as needed (step S16).

After the processing operation shown in step S16 is completed, the command to display each of the above data (that is, the command to display the data for one storage battery) is input from the keyboard 33. Is recognized (step S17),
The main CPU 51 controls the respective display units 45, 47 and 49 to display the respective values (that is, G20b after the temperature drift correction, the liquid level height h'and the liquid temperature detection value t) (step S18). After the processing operation shown in step S16 is completed,
When recognizing that a command to display the average reduced specific gravity, the average liquid surface and the average temperature of the electrolytic solution 3 of all the storage batteries 1 is input from the keyboard 33 (step S19), the main CPU 51 obtains it in step S16. The respective values are temporarily stored in a predetermined storage area of the memory 41 (step S2
0).

After obtaining the data on all the storage batteries 1, the main CPU 51 calculates the average conversion specific gravity, the average liquid surface and the average temperature of the electrolytic solution 3 of all the storage batteries 1 based on these data (step S21). ), The display units 45, 47 and 49 are controlled to display these respective values (step S22). When recognizing that the command to print out the value obtained in step S16 or step S21 is input from the keyboard 33 (step S23), the main C
The PU 51 controls the printer 53 to output each of the above data as a hard copy (step S24).

When the processing operations shown in steps S1 to S25 described above are completed, the series of arithmetic processing operations by the main CPU 51 is completed.

[0097]

As described above, according to the first aspect of the present invention, the shape or the like changes due to external factors, and the distance between two points for sampling the hydraulic pressure differs from the initial distance. When the inclination angle of the liquid container in which the liquid to be measured is contained is within a preset range, the pressure value generated by the movement of the liquid toward the inclination side due to the inclination is not present. It is possible to provide a pressure detection tube support mechanism including a pressure detection tube configured such that the error can be eliminated and installation is possible even in a small accommodation space.

According to the second aspect of the present invention, when the inclination of the liquid container is within a predetermined range, the differential pressure value generated by the movement of the liquid to be measured due to the inclination is measured. Equipped with a support mechanism that has a pressure detection tube with a structure that can eliminate errors and detect relatively large differential pressure, and can be applied in an environment where corrosive gas or corrosive liquid is used. It is possible to provide a device for measuring the specific gravity of a liquid, the liquid level height, and the liquid temperature, which can be simplified, downsized, lightened, and have an explosion-proof structure, and can be easily maintained.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a structure of a pressure detection tube support mechanism according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing the structure of a pressure detection tube support mechanism according to another embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an overall configuration of a specific gravity of an electrolytic solution, a liquid level height, and a liquid temperature measuring device.

FIG. 4 is an enlarged side sectional view showing the positional relationship between the pressure detection tube support mechanism shown in FIG. 1 or 2 and the pressure transducer for specific gravity, the pressure transducer for liquid level, the IC temperature sensor and the casing.

FIG. 5 is an explanatory diagram showing the principle of measuring the specific gravity of the electrolytic solution and the principle of measuring the liquid surface height of the electrolytic solution.

FIG. 6 is a block diagram showing a monitoring system of a storage battery equipped with a specific gravity of electrolyte, a liquid level height, and a liquid temperature measuring device.

7 is a block diagram showing a signal processing system of the monitoring system shown in FIG.

8 is a block diagram showing a signal processing system of the monitoring system shown in FIG.

9 is a flowchart showing the operation of the signal processing system shown in FIGS. 7 and 8. FIG.

10 is a flowchart showing the operation of the signal processing system shown in FIGS. 7 and 8. FIG.

[Explanation of symbols]

 1 Storage Battery 3 Electrolyte 9 Signal Processing Unit 23 Specific Gravity Sensor 25 Liquid Level Sensor 31 IC Temperature Sensor 39 Input / Output Port 45 Specific Gravity Display 47 Liquid Level Display 49 Liquid Temperature Display 51 Main CPU 53 Printer 55 Serial / Parallel Conversion Circuit 61 Parallel / serial converter 101, 102 Thin-walled support member 103, 104 Pressure detection pipe 108, 110 Hollow hole 123, 133, 135 Opening 125, 127 Branch pipe 129, 131 Branch pipe end 137 Specific gravity pressure transducer 139 Liquid level Pressure transducer

Claims (8)

[Claims] 1. A thin-walled support member that is fixedly inserted into a narrow gap in a liquid container while being immersed in a liquid, and two positions that are separated by a predetermined length from the thin-walled support member. First
A pressure detection tube that is attached and fixed to the thin-walled support member in a state where the end portion and the second end portion of the pressure detection tube are respectively positioned, and the first end portion of the pressure detection tube is An opening in which the conversion means is provided is formed, and a second end of the pressure detection pipe is connected to a branch pipe that intersects the pressure detection pipe main body in a substantially inverted T shape. The pressure detection tube support mechanism is characterized in that both end portions are respectively suspended by a predetermined length, and each of the suspended tip ends is opened. 2. A thin-walled support member that is fixedly inserted into a narrow gap in a liquid container while being immersed in a liquid, and a first end portion and a second end portion are substantially U-shaped. And a pressure detection tube which is in communication with each other via a bent portion and is fixedly attached to the thin-walled support member in a state where both ends are respectively positioned at two positions separated by a predetermined length from the thin-walled support member. The first end of the pressure detection tube is formed with an opening where the pressure / electrical signal conversion means is provided, and the second end of the pressure detection tube is provided with respect to the pressure detection tube main body. Branch pipes that intersect in a substantially inverted T shape are connected, and both end portions of the branch pipe hang down by a predetermined length, and each of the hanging tip ends is open. Pressure detection tube support mechanism. 3. A thin-walled support member fixedly inserted into a narrow gap in a liquid container while being immersed in a liquid, and a first end portion and a second end portion are substantially L-shaped. And a pressure detection tube which is in communication with each other via a bent portion and is fixedly attached to the thin-walled support member in a state where both ends are respectively positioned at two positions separated by a predetermined length from the thin-walled support member. , The first end of the pressure detection tube is formed with an opening in which the pressure / electrical signal converting means is provided, and the second end of the pressure detection tube is formed with an opening. The pressure detection tube is characterized in that the distance from the bent portion of the pressure detection tube to the second end is set to a length capable of compensating for the pressure change in the pressure detection tube due to the temperature change. Support mechanism. 4. A thin-walled support member fixedly inserted into a narrow gap in a liquid container while being immersed in the liquid,
In a pressure detection tube support mechanism comprising a rod-shaped pressure detection tube made of a flexible material and fixedly supported by the thin-walled support member, the thin-walled support member guides the pressure detection tube. A guide hole for positioning in a predetermined shape and posture is formed, and the guide hole has a first end portion for introducing a rod-shaped pressure detection tube and a substantially inverted T shape or a substantially T shape. And a second end portion into which a liquid penetrates into a branched tip portion, and a pressure detection tube support mechanism. 5. The pressure detection tube support mechanism according to claim 1, wherein the thin-walled support member and the pressure detection tube are inserted while being immersed in an electrolytic solution inside a storage battery. A pressure detection tube support mechanism, wherein the pressure detection tube is preferably made of a corrosion-resistant resin material, and the pressure detection tube is filled with air or nitrogen gas. 6. A detection unit for detecting a specific gravity of the liquid, a liquid level height, and a liquid temperature by being immersed in the liquid in the liquid container and outputting a predetermined electric signal, and an output from the detection unit. And a detection unit that executes signal processing based on the detection unit. The detection unit detects a differential pressure between arbitrary two points in the liquid at predetermined depth intervals and outputs an electric signal according to the differential pressure. The first differential pressure detection unit detects the differential pressure between the liquid pressure at a position submerged in the liquid and the atmospheric pressure at a position separated by a predetermined height from this position, and outputs an electrical signal corresponding to the detected differential pressure. The first differential pressure detection unit includes a second differential pressure detection unit that outputs, and a liquid temperature detection unit that detects the liquid temperature and outputs an electric signal according to the liquid temperature. The pressure detection tube support mechanism according to claim 1, further comprising pressure detection tubes having different lengths. And a pressure / electrical signal converting means for outputting an electric signal according to the differential pressure of the pressure applied to the first end of each pressure detection pipe supporting mechanism. The differential pressure detection unit 2 includes a pressure detection tube having end portions to which the liquid pressure and the atmospheric pressure are respectively applied, and a portion to which a differential pressure of the pressures applied to these end portions is applied, A pressure / electrical signal converting means for outputting an electric signal according to the differential pressure applied to the part, and the liquid temperature detecting part includes pressure detecting means provided in the first and second differential pressure detecting parts. A device for measuring the specific gravity of a liquid, the height of a liquid surface, and a liquid temperature, which is attached and fixed to a portion of a pipe that is constantly immersed in the liquid when measuring a differential pressure. 7. The liquid specific gravity, liquid level height, and liquid temperature measuring device according to claim 6, wherein the monitoring unit has an electric signal output from the first differential pressure detecting unit and the preset 2 The specific gravity calculating means for calculating the specific gravity of the liquid by inputting the distance data between the points, the specific gravity of the liquid obtained and the electric signal output from the second differential pressure detecting section are input. Then, by inputting the liquid surface height calculating means for calculating the liquid surface height of the liquid by a predetermined calculation formula and the data of the obtained specific gravity and liquid surface height, the specific gravity is calculated by the predetermined calculation formula. Specific gravity conversion means for converting temperature to specific gravity at a predetermined liquid level height, an electric signal output from the liquid temperature detection means, liquid level height data output from the liquid level calculation means, and a specific gravity Display means for inputting the specific gravity output from the converting means and displaying each separately The electrical signal output from the liquid temperature detection means, the liquid level height data output from the liquid level height calculation means, the specific gravity data output from the specific gravity calculation means, and the specific gravity conversion output from the specific gravity conversion means A device for inputting data and outputting a hard copy of each data, and a specific gravity of the liquid, a liquid level height, and a liquid temperature measuring device. 8. The liquid specific gravity, liquid level height, and liquid temperature measuring apparatus according to claim 6 or 7, wherein the liquid container is a plurality of storage batteries, and each storage battery has the detection unit. And signal conversion means for converting the electric signal output from the detection section into serial data, and each means of the monitoring section includes a storage battery based on the serial data output from each of the signal conversion means. Specific gravity of liquid, liquid level height and liquid temperature, and an average value thereof are calculated. Specific gravity of liquid, liquid level height and liquid temperature measuring device.