RU2595811C1 - Miniature device for rapid assessment of motor oils - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: invention relates to analysis and can be used for analysis of motor oils in field conditions. Miniature device for rapid assessment of motor oils consists of a detection unit, power supply unit and a disposable or reusable container for the oil sample, tightly connected with the help of thread with a unit of detection. Detection unit consists of sensitive measuring element (piezo-sensor) based on piezoelectric resonator with film coating, selective to volatile substances-markers of state, miniature excitation circuit, located inside a detection unit under the panel with the Piezoelectric sensor, recorder to a microprocessor for registration of signal of the piezo-sensor with three colour indicators. Actuation of the piezo-sensor signal variation rate is determined indicators in vapors of oil and depends on the degree of its development. Detection unit is connected to power supply unit with possibility of autonomous power supply from power supply unit built into the element or power supply network, on one of side surfaces of the power supply unit are arranged on and power indicator button, and in its lower part there are outputs for charging device and tire for connection with recorder.

EFFECT: invention provides simple mobile control and compact device, which preserves its operational characteristics and allows quickly obtain information on state of the motor oil in field conditions without sample preparation.

1 cl, 2 dwg

Description

The invention relates to techniques for the rapid analysis of motor oils, in particular for determining the content of gases, vapors in the equilibrium gas phase over a small volume of the sample in off-laboratory conditions in the on-site mode.

Currently, the market of analyzers and oil condition detectors is represented by systems that differ in the nature of functioning and operational characteristics. Fundamentally, they are divided into systems of continuous and periodic action. Continuous systems are small-sized, but, as a rule, highly selective for individual gases, and gas analyzers have restrictions on the group of determined air components, their scale is often graduated in units of concentrations of one gas, for their stable operation certain initial conditions are needed (for purity or humidity, being in space or a power source, etc.).

The technical task of the invention is to develop a miniature device for rapid assessment of the state of motor oils, which allows to control their condition, combine some characteristics of sensors and analyzers, such as: minimum dimensions, expressness of information, battery autonomy, easy control and reliable detection of volatile compounds and level their contents, indicating the degree of mining, the ability to measure in the field without additional special devices and equipment in on-site mode, long-term maintenance of operational characteristics.

To solve the technical problem of the invention, a miniature device for rapid assessment of the condition of motor oils is proposed, consisting of a detection unit, a power unit and a disposable or reusable container for an oil sample, hermetically connected by a thread to the detection unit, which consists of a sensitive measuring element (piezosensor) based on a piezoresonator with a coating film selective for volatile state markers, a miniature excitation circuit located inside the detector unit beneath a panel with a piezosensor, a recorder with a microprocessor for registering a piezosensor signal with three color indicators, the response of which is determined by the rate of change of the piezosensor signal in oil vapor and depends on the degree of its development, and the detection unit is connected to the power unit with the possibility of autonomous power supply from the built-in unit power supply of the element or mains power, on one of the side surfaces of the power supply there is a power button and a power indicator, in its lower part there are odes for the charger and bus for connecting to the recorder.

The technical result of the invention lies in the mobility and compactness of a miniature device for rapid assessment of the condition of motor oils with minimum sizes while maintaining all the working functions, namely the generation of piezosensor vibrations, autonomous or external power, recording information and deciding on the quality of the sample through the use of miniature microcircuit and programmable microprocessor, the possibility of using compact power supplies with a reserve of time or the use of an external power source; in express obtaining results on the presence and content in the equilibrium gas phase of an oil sample of volatile state marker substances, the content of which correlates with the degree of development of motor oils, including in off-laboratory conditions without sample preparation (analysis of the sample in the on-site mode); in easy operation, the possibility of long-term operation and quick replacement of the measuring element during mining; in the long-term maintenance of operational characteristics due to the discrete measurement mode and the termination of the load of the piezosensor by moving it to a dry miniature container with silica gel or another sorbent after a certain short contact time with the analyzed medium.

In FIG. 1 shows a miniature device for rapid assessment of the condition of motor oils: a) collapsible; b) in assembled form, in FIG. 2 is a general view of a miniature device for expressly assessing the state of motor oils when a color detector is triggered for a different oil condition: a) “normal”, b) “average level of development”, c) “should be replaced”.

A miniature device for the rapid assessment of the state of motor oils (Fig. 1-2) consists of a detection unit 1, a power supply 2 and a disposable or reusable container for an oil sample 3, hermetically connected by a thread 4 to the detection unit 1, which consists of a sensitive a measuring element 5 (piezosensor) based on a piezoresonator with a coating film 6 selective for volatile state markers, a miniature excitation circuit located inside the detection unit 1 under the panel with a piezosensor 5, regis a rotor with a microprocessor for registering a piezosensor signal with three color indicators 7, the response of which is determined by the rate of change of the piezosensor signal in oil vapor and depends on its degree of development, and the detection unit 1 is connected to a power unit 2 with the possibility of autonomous power supply from an element integrated in the power supply unit or mains power, on one of the side surfaces of the power supply there is a power button 8 and a power indicator 9, at the bottom there are outputs for the charger and bus 10 to connect to the recorder, an oil sample is poured to the mark in a disposable or reusable container 3 and hermetically connected using a thread 4 to the detection unit 1 so that the sensitive measuring element 5 (piezosensor) mounted on it, based on a piezoresonator with a coating film 6, a condition selective to volatile marker substances, the content of which correlates with the degree of engine oil depletion, was inside the vessel 3, the change in the signal of the piezosensor was recorded using three color indicators 7, s the abatment of which is determined by the rate of change of the piezosensor signal in the oil vapor and depends on the degree of its working out: green - “normal”, yellow - “average working level”, red - “should be replaced”, while the analysis time does not exceed 1-2 minutes, for recovery and storage of the piezosensor is placed in a miniature tank 11 with a sorbent 12 placed on the bottom.

A miniature device for rapid assessment of the condition of motor oils works as follows.

The power supply unit 2 using a bus 10 is connected to a miniature excitation circuit, a microprocessor and, exciting oscillations, a sensing element - a piezosensor 5 based on a piezoresonator with a coating film 6, which is selective for volatile state markers, the content of which correlates with the degree of exhaustion of motor oils, include stand-alone power supply or from the network using the power button 8, the indicator 9 lights up. The color indicators 7 do not light up. For testing and assessing the condition of the oil in a disposable or reusable container 3 pour oil to the mark. Carefully remove (twist) from the registrar a miniature tank 11 with a sorbent 12 placed on the bottom, in which the measuring element is stored and the state of the sensitive selective film is restored 6. Screw the container with oil 3 into the detection unit 1 by screwing 3. Watch the indicator lights 7 on case of the registrar.

Highly volatile substances-markers from oil spontaneously diffuse to the surface of the film coating, interact with it for a certain time, which depends on the characteristics of the reaction between the vapors, determined by their nature and concentration, and the film coating 6, while the rate of change of the oscillation frequency of the piezosensor depends on the concentration of volatile substances -markers of oil development. Within 15 s, one of the indicator lights 7, which determines the state of the oil, is activated: green - “normal” (Fig. 2 - a), yellow - “average level of development” (Fig. 2 - b), red - “should be replaced” ( Fig. 2 - c). A reversible reaction proceeds on the film coating, and for repeated use, the piezosensor is regenerated in a miniature container 11 with sorbent 12.

The proposed miniature device for rapid assessment of the condition of motor oils allows you to:

1) to increase the mobility and compactness of a miniature device for rapid assessment of the condition of motor oils with minimum sizes while maintaining all the working functions (generating piezosensor vibrations, autonomous or external power, recording information and deciding on the quality of the sample), through the use of a miniature chip and programmable microprocessor, the possibility of using compact power supplies with a reserve of time or using an external power source;

2) to quickly obtain information on the presence and content in the equilibrium gas phase above the oil sample, including in off-laboratory conditions without sample preparation (analysis of the sample in the on-site mode), information on volatile substances, markers of the state of the oil;

3) to simplify the management and measurement of gas concentrations in the on-site mode;

4) maintain operational characteristics for a long time due to the discrete measurement mode and termination of the piezosensor load by moving it to a dry miniature container with silica gel or another sorbent after a certain short time of contact with the analyzed medium;

5) expand the analytical capabilities of the miniature analyzer, including by eliminating the calibration of the device in units of one gas concentration, microprocessor converting the piezosensor signals into a response and its subsequent reflection in the form of a color signal;

6) the possibility of long-term operation and quick replacement of the measuring element during mining.

Claims (1)

A miniature device for rapid assessment of the condition of motor oils, consisting of a detection unit, a power supply unit and a disposable or reusable oil sample container, hermetically connected by means of a thread to the detection unit, which consists of a sensitive measuring element (piezosensor) based on a piezoresonator with a coating film selective to volatile substances-markers of state, a miniature excitation circuit located inside the detection unit under the panel with a piezosensor, a recorder with a micro a processor for recording a piezosensor signal with three color indicators, the response of which is determined by the rate of change of the piezosensor signal in oil vapor and depends on the degree of its development, the detection unit being connected to a power unit with the possibility of autonomous power supply from an element integrated in the power supply unit or mains supply, on one of the side surfaces of the power supply there is a power button and a power indicator, in its lower part there are outputs for a charger and a bus for connecting to istratorom.

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