CN2872352Y - Dynamic titrating inspecting sensor of lubricating grease - Google Patents

Abstract

A sensor circuit is controlled by a single-chip microcomputer and its peripheral circuit comprises a CCD chip, an amplifier, a lattice LCD, a keyboard and a memory. The circuit is controlled by a program demand pre-stored in the memory. After oil droplets fall from a device to be test into a predetermined zone, a corresponding image is formed by a CCD image sensor and then compared with data stored in RAM of the single-chip microcomputer, followed by signal output. Compared with the prior art, the utility model realizes the dynamic detection of lubricant oil droplets, with advantages of high detection accuracy and good repeatability; and additionally, based on the interaction of keyboard and LCD, detection zone can be set flexibly to adapt to different droplet shapes of various lubricant oils.

Description

A kind of lubricant grease dropping point detection of dynamic sensor

Technical field

The utility model relates to photoelectric sensor, particularly a kind of photoelectric sensor that is used for carrying out when lubricant grease forms the liquid oil droplet at a certain temperature detection of dynamic.

Technical background

The lubricant grease dropping point is meant under the test condition of regulation, and lubricant grease reaches certain temperature when mobile.This temperature is also referred to as lubricant grease dropping point temperature, is the important indicator that characterizes the lubricant grease quality.

Measuring method to the lubricant grease dropping point is to measure according to State Standard of the People's Republic of China GB4929-85 " lubricant grease dropping point determination method " at present, its method is to adopt easy device to heat, when grease oozes by eye manual observation, mainly there is following shortcoming: require experimenter's notice high concentration, otherwise can miss the moment that grease oozes, cause measuring error; The manual measurement degree of accuracy is poor, oozes when observing grease, writes down two temperature values again, can cause the temporal error of temperature survey, thereby influence measuring accuracy; The error of manual operation is big, and manual observation, record and operator have direct relation, even therefore to same instrument, same sample, the error that standard allows reaches 7 ℃, this scope is very wide, also will exceed this error in the practical operation in some is measured; The chance that manually-operated makes mistakes is many, oozes observation at grease, and any one link of temperature record is made mistakes, and experiment this time just fails, so conventional efficient is very low; Have the instrument repeatability poor, in the different experiments chamber, reproducibility error reaches 13 ℃ by the different operating person.

Existing instrument functions of use is poor, according to the testing crew reflection, uses existing equipment to need to be equipped with two to three operating personnel at least, observes oil droplet and record temperature respectively, has not still had the robotization detecting instrument at present and has occurred.

In view of the prior art above shortcomings, the utility model provides a kind of novel sensor that is used for lubricant grease dropping point detection of dynamic, when this sensor reaches the dropping point temperature and forms dropping point at lubricant grease, provides detection signal.

Summary of the invention

The technical scheme that the utility model is taked for achieving the above object is: single chip circuit control of sensor electrical route, and its peripheral circuit comprises compositions such as line array CCD camera chip, amplifier, lattice lcd display, keyboard and storer; It is characterized in that circuit is by the programmed instruction control that is stored in advance in the storer; Circuit is fixed in the casing, casing side fixed optics camera lens, and the focus place that is in optical lens is adjusted in CCD camera chip fixed position; The I/O digital pin I/OA0～I/OA3 of single-chip microcomputer requires to provide control timing according to the sequential of CCD chip, the CCD chip voltage output V of presentation video _OUTAmplify through sign-changing amplifier, be transformed into the voltage range that is fit to the inner A/D converter of single-chip microcomputer, like this, the collected single-chip microcomputer of picture signal inside; According to the ccd image definition, a two field picture is by the definition of ccd image sensor resolution, and for example, 1024 linear array CCD image sensors are made up of 1024 pixels.

Grease oil droplet in the tested device will produce respective image in ccd image sensor after entering the given area, single-chip microcomputer with data among itself and the RAM relatively after, just can provide signal.This zone is given by the single-chip microcomputer keyboard, and it represents a zone among the internal memory RAM, and by internal memory address ram index.

Compared with prior art, the instrument that adopts this sensor to constitute carries out detection of dynamic to lubricant grease dropping point oil droplet and has the following advantages: realized the dynamic auto detection of lubricant grease dropping point oil droplet; The accuracy of detection height; Good reproducibility; Repeatability is good; Keyboard and LCD is mutual in the employing microprocessor, can set surveyed area flexibly, adapts to the different oil droplet shapes of different oils lipid species.Thereby the deficiencies in the prior art have been remedied.

Description of drawings

Fig. 1 is the utility model structural representation and as Figure of abstract;

Fig. 2 is a circuit diagram;

Fig. 3 is a software flow pattern;

Among the figure: 1. optical lens, 2.CCD chip, 3. sign-changing amplifier, 4. single-chip microcomputer, 5. external memory storage, 6. dot matrix LCD, 7. keyboard, 8. resistance, 9. tested device assembly, 91. test tubes, 92. stauffer cups, 93. heating arrangements, 94. oil bath oil, 95. lubricant grease oil droplets.

Embodiment

As shown in Figure 1, 2: sensor circuit comprises a single-chip microcomputer 4, reaches the peripheral circuit of being made up of line array CCD chip 2, sign-changing amplifier 3, storer 5, dot matrix LCD display 6 and keyboard 7, resistance 8; And by the programmed instruction control that is stored in advance in the storer 5; Circuit is fixed in the casing, casing side fixed optics camera lens 1, and CCD chip 2 fixed positions are in the focus place of optical lens 1;

The I/O digital pin I/OA0～I/OA3 of single-chip microcomputer 4 requires to provide control timing according to the sequential of CCD chip, the CCD chip 2 voltages output V of presentation video _OUTAmplify through sign-changing amplifier 3, be transformed into the voltage range that is fit to the inner A/D converter of single-chip microcomputer, like this, the collected single-chip microcomputer of picture signal inside; According to the ccd image definition, a two field picture is by the definition of ccd image sensor resolution, and 1024 linear array CCD image sensors are made up of 1024 pixels in the present embodiment.

Single-chip microcomputer collect a frame image data 1024} carries out binary conversion treatment for x (i), i=1, a promptly given threshold value A,

$y\left(i\right)=\left\{\begin{array}{cc}1& x\left(i\right)\&GreaterEqual;A\\ 0& x\left(i\right)<A\end{array}\right.i=0...1024$

Data y after the processing (i) has only two kinds of images of black and white, has ignored gray scale.The result delivers in the single-chip microcomputer external RAM.

Tested device assembly 9 in the present embodiment comprises test tube 91. stauffer cups 92. heating arrangements 93.

Oil bath oil 94 in the heating arrangement 93 heating beakers, when reaching uniform temperature, grease begins to melt in the test tube 91 interior stauffer cups 92, lubricant grease oil droplet 95 oozes from stauffer cup 92 end openings, after entering given test zone, will in ccd image sensor, produce respective image, single-chip microcomputer with data among itself and the RAM relatively after, just can provide signal; This zone is given by the single-chip microcomputer keyboard, and it represents a zone among the internal memory RAM, and by internal memory address ram index.

The grease oil droplet drippage process that dot matrix LCD liquid crystal display displays image capture sensor arrives.

The course of work of sensor is:

The first step: oil droplet forming process when adopting imageing sensor (CCD or COMS) to detect the lubricant grease dropping point;

Second step: microcontroller circuit is to the dynamic auto identification of lubricant grease oil droplet and provide detection signal;

The 3rd step: LCD dynamically shows lubricant grease oil droplet forming process;

The 4th step: with the different surveyed areas of function key assignments lubricant grease dropping point;

Open heating arrangement, make the temperature of oil bath oil constantly raise, in the aperture below stauffer cup, form the lubricant grease oil droplet gradually, imageing sensor is monitored this oil droplet forming process by camera lens, when oil droplet breaks away from the moment of stauffer cup, and reach a certain zone of predefined grease oil droplet dropping process, sensor output detection signal.

Imageing sensor can adopt CCD or COMS imageing sensor, it also can be the line array CCD sensor, can be colored or black and white, its major function be constantly to detect the procedural image that oil droplet drips, and what adopt in the present embodiment is the black and white line array CCD image sensor of 1024 dot matrix.

Linear Array CCD Signal is delivered to microprocessor after amplifying through video, microprocessor generally can adopt single-chip microcomputer or PC computing machine and similar computer processing circuit, the formed picture signal of oil droplet is constantly gathered by microprocessor, and deposit in the internal memory, pass through binarization processing of images, microprocessor can tell whether there is oil droplet in the appointed area, thereby provides detection signal.

The effect of interactive keyboard be used to refer to stand oil drip surveyed area the position and the size, the LCD LCD is accepted the simulation process of the oil droplet drippage process that microprocessor sends here, provide intuitively and show, simultaneously, when not adopting oil droplet to detect automatically, can help operating personnel's manual detection oil droplet.

Microprocessor software flow process as shown in Figure 3 is described below the control procedure of microprocessor software:

Step 100: beginning: the single-chip microcomputer lubricant grease dropping point detection of dynamic that resets

Step 101: initialization ccd image sensor, pass keyboard interrupt

Step 102: gather a frame ccd image, in this example, gather 1024 pixels

Step 103: binary conversion treatment, the pixel that will have gray-scale value convert 0 and 1,0 expression to and do not detect oil droplet according to certain gray scale threshold values, and 1 expression detects oil droplet

Step 104: deposit binaryzation number in the step 103 in the microprocessor internal memory

Step 105: be mapped in the keyboard appointment that oil droplet assigned address and zone compare in the internal memory

Step 106: the oil droplet image send LCD to show

Step 107: judge in the appointed area, to have the oil droplet image

Step 108: if there is not the oil droplet image, then continue the next frame image acquisition,, provide detection signal if the oil droplet image is arranged

Step 109: finish

Can reproduce the utility model according to above embodiment.

Claims (1)

1. lubricant grease dropping point detection of dynamic sensor, sensor circuit comprise a single-chip microcomputer (4) and the peripheral circuit of being made up of line array CCD camera chip (2), sign-changing amplifier (3), storer (5), lattice lcd LCD display (6) and keyboard (7), resistance (8); Wherein, circuit is fixed in the casing, casing side fixed optics camera lens (1), and CCD camera chip (2) fixed position is in the focus place of optical lens (1); The I/O digital pin I/OA0 of single-chip microcomputer (4)～I/OA3 connects CCD camera chip (2), and the sign-changing amplifier (3) that is connected with CCD camera chip (2) connects single-chip microcomputer (4).

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