JP2560294Y2 - Oil deterioration measuring instrument - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil deterioration measuring device for easily measuring pollution and oxidative deterioration of oil used in engines and hydraulic equipment and measuring the degree of deterioration.

[0002]

2. Description of the Related Art As a conventional oil deterioration measuring means of this type, as shown in Japanese Patent Application Laid-Open No. 61-135913, oil is interposed between a light-emitting section and a light-receiving section, and oil from the light-emitting section is measured. There is a method in which deterioration of oil is measured based on transmittance when light having a wavelength longer than about 600 mm passes through oil and is received by a light receiving unit. In addition, conventional
Japanese Unexamined Patent Publication No. 3-31749 discloses an oil deterioration measuring means.
As shown in the above, using an infrared spectroscopic analyzer,
Determine the pentane-insoluble content and the total acid value of the oil
There is one that measures the deterioration of the file. further,
There is also known means for measuring the dielectric constant of oil and measuring the degree of deterioration of the oil from the change in the dielectric constant.

[0003] Of the above conventional techniques, Japanese Patent Application Laid-Open No. 61-13 / 1986
The technique disclosed in Japanese Patent No. 5913 detects the degree of oil pollution from a change in light transmittance, and this method only captures a part of the oil deterioration phenomenon. Couldn't capture the whole picture. Ma
Japanese Patent Application Laid-Open No. 3-31749 discloses an extreme
Infrared light is transmitted through a thin film of oil,
The total acid value and the pentane-insoluble matter by the absorption wavelength
The oil thickness control described above must be measured
It must be done precisely, but the viscosity of the oil
If high, it is difficult to keep this oil thickness constant
Yes, the handling of the device during measurement is troublesome.
Was. Also, the detection value is large due to the resolution of the detection wavelength of the device.
Measurement depends on the precision of the equipment
There was a problem that the work was troublesome. Further, the method of capturing the change in the dielectric constant is simple but has a problem that the indicated value changes depending on the type and amount of the deteriorated component contained in the deteriorated oil.

[0004] The deterioration of oil depends on the amount of soot produced by combustion and foreign matter mixed in from outside (this corresponds to n-pentane-insoluble matter in ASTM) and the amount of oxidative deterioration products in oil (this is the total amount of JIS). Acid value and strong acid value). Considering the above, the present invention can detect oil pollution from light transmission attenuation, detect oxidative degradation from the potential generated at the heterogeneous electrode pair, and easily measure oil pollution and oxidative degradation. Can and take
Handling is simple, it is an object to provide an oil deterioration measurement device that can be easily performed measurements.

[0005]

To achieve the above object, according to the Invention The oil degradation measuring apparatus according to the present invention, in the oil-degradation measuring device consisting of a insoluble component sensor and total acid number sensor,
A light-emitting device is arranged on one back surface of a pair of transparent plates opposed to each other with a slight gap, and a light-receiving device is arranged on the other back surface to form an insoluble component sensor. A total acid value sensor was constructed by attaching a pair of different kinds of electrodes separated from each other.

[0006]

[Action] For the insoluble component sensor, between the light emitter and the light receiver
Light is transmitted through the oil to be measured
Is converted into an electric signal, and this electric signal
The pentane-insoluble content is measured by the output of. Also,
For the total acid value sensor, the dual
The potential difference between the poles is extracted as an electrical signal, and this electrical signal
, The total acid value sensor is measured. At this time,
A few drops of oil are sufficient between the sensors.

[0007]

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. In the figure, 1 is an insoluble component sensor, 2 is a total acid value sensor, and these are held close to each other by a measuring instrument body (not shown). The insoluble component sensor 1 is configured such that a light emitting device 3 composed of an LED and a light receiving device 4 such as a photodiode or a phototransistor are opposed to each other with an interval of 0.1 to 0.05 mm. The total acid value sensor 2 is Ag
The electrode 5 and the Ir electrode 6 are composed of a pair of metal electrodes. The light emitting device 3 is configured by LED of the insoluble component sensor 1 oscillation circuit 8 through the LED driving circuit 7 is connected. There also photoreceiver 4 amplifier 9 to the light receiver 4 is configured by a photodiode, a band-pass filter 10, comparator circuit 11, smoothing circuit 12 and the level meter circuit 14 via the zero adjustment circuit 13 is connected .
On the other hand, both electrodes 5 and 6 of the metal electrodes are high-resistance input differential amplifiers 1.
5, is connected to the level meter circuit 14 via a low-pass filter 16 and a zero adjustment circuit 17. A midpoint generation circuit 18 is connected to the high-resistance input differential amplifier 15 and the low-pass filter 16. The above level meter circuit 1
4 is connected to a display 19.

In the above arrangement, at the time of measurement, the oil to be measured is dropped between the opposed intervals of the sensors 1 and 2. In the insoluble matter sensor 1, for example, light is transmitted between the light emitting device 3 and the light receiving device 4 whose facing distance is fixed to 0.07 mm, and the transmitted light is received by the light receiving device 4, and the light receiving amount is determined. Is converted into an electric signal. The amount of received light changes according to the amount of oil contamination. Accordingly, the electrical output of the photodiode, which varies depending on the amount of light, and the amount of turbidity (the amount of pentane-insoluble matter) are obtained in advance and displayed on the display 19 based on this correlation. On the other hand, total acid value sensor 2
Since the electrodes 5 and 6 are immersed in the oil, a potential difference is generated between the electrodes 5 and 6, and the potential difference is impedance-converted and voltage-amplified by a detection circuit connected to the electrodes 5 and 6 to measure the electric potential. A signal is displayed on the display 19.

FIG. 2 shows an example of the structure of the sensor section of the oil deterioration measuring device. In the drawing, reference numerals 20 and 21 denote holding plates opposed to each other with a slight gap therebetween. Transparent plates 22 and 23 are provided on both of the holding plates 20 and 21 so as to face each other with a 0.07 mm opposing gap therebetween. The light emitting device 3 is mounted on the back of one of the transparent plates 22 and 23, and the light receiving surface 4 is mounted on the back of the other transparent plate 23. The dissolved component sensor 1 is configured.
A ring-shaped Ag is provided on the facing surfaces of the transparent plates 22 and 23.
An electrode 5 and an Ir electrode 6 are attached.
The optical path portion of the insoluble component sensor 1 is constituted by the ring portion.

In this configuration, the oil to be detected is dropped between the transparent plates 22 and 23, so that the transparent plates 22 and
The amount of pentane insoluble in the oil is detected from the amount of light transmitted between the three electrodes, and the total acid value can be known from the potential difference between the electrodes 5 and 6.

FIGS. 3 to 6 show the relationship between the display on the display 19 and the concentration of the insoluble matter and the total acid value. 3 and 4 show the analog display, and FIG. 3 shows the level meter display and the n-
FIG. 4 shows the relationship between the pentane-insoluble matter, and FIG. 4 shows the relationship between the level meter display and the total acid value. 5 and FIG.
Is a digital display, and shows the relationship between the level meter display, n-pentane insoluble matter, and total acid value, respectively, as described above.

[0012]

[Effects of the Invention] The present invention is as described above. By providing the insoluble component sensor 1 and the total acid value sensor 2, the concentration of the insoluble component in the oil to be measured can be measured with one oil deterioration measuring device. , The total acid value can be measured both, oil pollution
The whole picture can be captured. In addition, the light-emitting device 3 is arranged on one back surface of the pair of transparent plates 22 and 23, and the light-receiving device 4 is arranged on the other back surface. Constituting the dissolved content sensor 1;
By mounting a pair of electrodes 5 and 6 spaced apart from each other in the vicinity of the insoluble component sensor 1 to constitute the total acid value sensor 2, the insoluble component sensor 1 and the total acid value sensor 2 can be compactly assembled. it can. And especially according to the invention,
Oil contamination, light transmission attenuation, and oxidation degradation
Because it can be detected from the potential generated at the seed electrode pair,
And the oxidative degradation of the oil can be easily measured. Sa
In addition, the conventional method for detecting the wavelength of the transmission
Unlike the technology, the sensor interposed between the facing sensors
The thickness of the measuring oil does not need to be controlled very precisely
Is easy to handle at the time of measurement.
It can be done easily. And furthermore, this configuration
If you don't need to make so precise measurements,
It can be done easily.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a schematic structural explanatory view showing an embodiment of a sensor unit.

FIG. 3 is a diagrammatically showing a relationship between a level meter display and n-pentane insoluble matter.

FIG. 4 is a diagram showing the relationship between the level meter display and the total acid value in an analog manner.

FIG. 5 is a diagram digitally showing a relationship between a level meter display and n-pentane insoluble matter.

FIG. 6 is a diagram digitally showing a relationship between a level meter display and a total acid value.

[Explanation of symbols]

1 Insoluble sensor, 2 total acid value sensor, 3 light emitter,
4 Receiver, 5, 6 are electrodes, 22, 23 Transparent plate.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Atsuhiko Hirosawa 1200 Manda, Hiratsuka-shi, Kanagawa Prefecture, Komatsu Ltd. Laboratory (56) References JP-A-3-31746 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] And 1. A insolubles sensor 1 for measuring the turbidity of the oil was in oil degradation measuring device consisting of a total acid number sensor 2 which for measuring the oxidation degradation of the oil, at a small gap and oppositely arranged pairs The light-emitting device 3 is provided on one back surface of the transparent plates 22 and 23, and the light-receiving device 4 is provided on the other back surface, to constitute an insoluble component sensor 1. A pair of spaced apart components is provided near the insoluble component sensor. An oil deterioration measuring device characterized in that the total acid value sensor 2 is constituted by attaching different kinds of electrodes 5 and 6 of the above.