CN202903360U - Constant temperature groove automatic detection device - Google Patents
Constant temperature groove automatic detection device Download PDFInfo
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- CN202903360U CN202903360U CN 201220597120 CN201220597120U CN202903360U CN 202903360 U CN202903360 U CN 202903360U CN 201220597120 CN201220597120 CN 201220597120 CN 201220597120 U CN201220597120 U CN 201220597120U CN 202903360 U CN202903360 U CN 202903360U
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- calibration cell
- platinum resistance
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Abstract
The utility model relates to a detection device, and belongs to the field of industrial detection. The utility model discloses a constant temperature groove automatic detection device, which is characterized by comprising a case arranged on a notch plane of a constant temperature groove, wherein the upper top surface and the lower bottom surface of the case are partially opened and used for inserting a temperature measuring platinum resistor in a liquid inside the constant temperature groove; a rotating big gear wheel and a small gear wheel meshed with the rotating big gear wheel are installed on a bottom plate of the lower bottom surface of the case, the small gear wheel is driven by a rotating motor, and a photoelectric sensor is installed beside; a vertically arranged lifting gear rack is installed on the upper side of the top surface of the rotating gear wheel, the middle of the lifting gear rack is provided with a through-hole in which a mobile temperature measuring platinum resistor is inserted, the lower end of the lifting gear rack is immersed in the constant temperature groove, and the lifting gear rack is driven by a lifting motor gear which is driven by the lifting motor; an encoder monitoring the lifting position is installed beside, and a gear wheel of the encoder is also meshed with the lifting gear rack; and the rotating shaft center of the rotating big gear wheel and the center of the bottom surface of the case are provided with through-holes, and the fixed temperature measuring platinum resistor is installed in the through-holes.
Description
Technical field
The utility model relates to calibration cell, relates in particular to the automatic detection device for calibration cell.
Background technology
Calibration cell can be divided into electric heating constant temperature groove and low temperature thermostat bath.The electric heating constant temperature groove, also be bath, be widely used in drying, concentrated, distillation, dipping chemical reagent, dipping medicine and biological products, also can be used for constant temperature water bath heating and other humid test, is the indispensable instrument of biology, heredity, virus, aquatic products, environmental protection, medicine, health, Biochemical Lab, analysis room, education and scientific research.The technical feature of calibration cell such as temperature fluctuation situation, homogeneity etc. have very large impact to its application, therefore the performance of calibration cell self are also had certain requirement, need to test the performance of calibration cell.
Mainly be according to JJF1030-2010 " calibration cell technical feature test specification ", trace routine more complicated to the Performance Detection of calibration cell at present.Altogether need up and down 9 tests, relate to calibration cell fluctuation degree, inhomogeneity detection, platinum-resistance thermometer need change the position and repeatedly detect.What detect now employing is manual detection, complex operation, need to confirm rear pinpoint test point position after every some test, therefore insert again after all platinum-resistance thermometer will being extracted after every some test, extract that temperature can change in the insertion process, so gather next measurement data need to wait for platinum-resistance thermometer and calibration cell temperature again time of balance longer, test is extracted insertion with platinum resistance and is also damaged easily.And the reading of test is loaded down with trivial details, reading radix large (altogether needing to record 248 data according to vertification regulation test request temperature spot), and the raw data calculation of complex, the energy that manual detection need to be paid is large, and the probability that the human error occurs is also high.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of calibration cell automatic detection device, and it is loaded down with trivial details to solve present manually-operated, needs manpower to monitor on time, and detects the unsettled defective of degree of accuracy.Technical scheme
A kind of calibration cell automatic detection device, it is characterized in that: comprise the cabinet that is arranged on calibration cell top notch, described cabinet is placed on the constant temperature notch and covers on the whole notch, upper end face and bottom surface part opening, be used for the thermometric platinum resistance and inject the interior liquid of calibration cell, the cabinet bottom surface mainly is comprised of with the side base plate that temperature-measuring part is installed the round bottom face that is positioned on the notch, there is web joint at the center of described side base plate and round bottom face, the remainder of round bottom face is opening, web joint at round bottom face center is equipped with the rotation gear wheel, pinion wheel with described rotation gear wheel engagement is installed on the side base plate, pinion wheel is driven by rotary electric machine, the next door is equipped with photoelectric sensor, the monitoring counting rotates the rotation number of teeth of gear wheel, avris is equipped with mobile thermometric platinum resistance detent mechanism on the gear wheel end face rotating, described mobile thermometric platinum resistance detent mechanism comprises the lifter rack of vertically setting up, described lifter rack center is for inserting the through hole of mobile platinum resistance, mobile platinum resistance is passed through hole and is fixed, the lower end is immersed in the calibration cell, gear engagement on lifter rack and the lifting motor axle, drive the tooth bar rise and fall by lifting motor, the tooth bar another side is equipped with the scrambler of monitoring lifting position, the gear of described scrambler also meshes with lifter rack, the spindle central of described rotation gear wheel and round bottom face center are through hole, and fixedly thermometric platinum resistance is installed; Described rotary electric machine, photoelectric sensor, lifting motor and lifting position scrambler detect controller with calibration cell and are connected, and control and feed back rotational angle and the lifting position of mobile thermometric platinum resistance.
Described mobile thermometric platinum resistance detent mechanism is fixed on the slide block, be installed on the described rotation gear wheel by slide block, rotate on the gear wheel and have a chute from the circumference to the center of circle, described slide block embeds and is installed in the described chute, and can slide in chute and adjust the position of mobile thermometric platinum resistance.
At described lifter rack downside the microswitch position-limit mechanism is installed, limits up and down stroke of lifter rack, on the sidewall of described cabinet, also be provided with the microswitch position-limit mechanism, limit mobile thermometric platinum resistance rotational angle.
The interior angle of web joint in the center of round bottom face that described side base plate links to each other with the center of round bottom face is acute angle.
Described cabinet below is provided with base, is placed on the constant temperature notch by described base, and base comprises up and down two parts, and upper section diameter is greater than lower section diameter.
Described base bottom is divided into right cylinder.
Described base bottom is divided into the rectangular parallelepiped base plate.
Beneficial effect
Calibration cell automatic detection device of the present utility model can be finished layouting up and down in effective temperature field in the testing process in full automatic mode, the collection of experimental data and calculating, easy and simple to handle directly perceived, realize the manual operation full automation, shortened the test duration, the accuracy of increasing work efficiency and layout, the accuracy of assurance raw data acquisition, greatly simplify the operation of each link, improve detectability; Simultaneously, device also is provided with 3 limit switches, and protective effect has been played in the overshoot of cabinet lifting and rotation, makes device more safe and reliable.
Description of drawings
Fig. 1 is calibration cell check point requirement synoptic diagram in the utility model.
Fig. 2 is the utility model schematic top plan view.
Fig. 3 is that the utility model master looks cross-sectional schematic.
Wherein: 1-photoelectric sensor, 2-side base plate, 3-lifting position scrambler, the 4-web joint, 5-microswitch position limiting structure, 6-lifting motor gear, the 7-lifting motor, 8-rotary electric machine, 9-lifter rack, 10-moves the thermometric platinum resistance, and 11-is the thermometric platinum resistance fixedly, the 12-chute, the 13-pinion wheel, 14-rotates gear wheel, 15-base, the 16-slide block, the 17-casing.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.
In order to improve detection efficiency, the concept that automatically detects is introduced in design in calibration cell test experiments process.Automatic checkout system can realize the manual operation full automation, shorten the test duration, increase work efficiency and layout accuracy, improve the repdocutbility of whole test process, the measured parameter full automation gathers, and guarantees the accuracy of raw data acquisition, by realizing automatic gauge, greatly simplify the operation of each link, improve the ability of unloading.
Whole device is monitored the angle of displacement and the rotation of mechanical component lifting by an angular encoder and photoelectric sensor.
Be depicted as the calibration cell automatic detection device of this programme design such as annex 2 and 3, comprise the cabinet that is arranged on calibration cell top notch, described cabinet is placed on the constant temperature notch and covers on the whole notch, upper end face and bottom surface part opening, be used for temperature detecting resistance and inject the interior liquid of calibration cell, the cabinet bottom surface mainly is comprised of with the side base plate that temperature-measuring part is installed the round bottom face that is positioned on the notch, there is web joint at the center of described side base plate and round bottom face, the remainder of round bottom face is opening, web joint at round bottom face center is equipped with the rotation gear wheel, pinion wheel with described rotation gear wheel engagement is installed on the side base plate, pinion wheel is driven by rotary electric machine, the next door is equipped with photoelectric sensor, the monitoring counting rotates the rotation number of teeth of gear wheel, avris is equipped with mobile thermometric platinum resistance detent mechanism on the gear wheel end face rotating, described mobile thermometric platinum resistance detent mechanism comprises the lifter rack of vertically setting up, described lifter rack center is for inserting the through hole of mobile platinum resistance, mobile platinum resistance is passed through hole and is fixed, the lower end is immersed in the calibration cell, gear engagement on lifter rack and the lifting motor axle, drive the tooth bar rise and fall by lifting motor, the tooth bar another side is equipped with the scrambler of monitoring lifting position, the gear of described scrambler also meshes with lifter rack, the spindle central of described rotation gear wheel and round bottom face center are through hole, and fixedly thermometric platinum resistance is installed; Described rotary electric machine, photoelectric sensor, lifting motor and lifting position scrambler detect controller with calibration cell and are connected, and control and feed back rotational angle and the lifting displacement of mobile thermometric platinum resistance.
Described mobile thermometric platinum resistance detent mechanism is fixed on the slide block, be installed on the described rotation gear wheel by slide block, rotate on the gear wheel and have a chute from the circumference to the center of circle, described slide block embeds and is installed in the described chute, and can slide in chute and adjust the position of mobile thermometric platinum resistance.
At described lifter rack downside the microswitch position-limit mechanism is installed, limits up and down stroke of lifter rack, on the base plate of described cabinet, also be provided with the microswitch position-limit mechanism, limit mobile thermometric platinum resistance rotational angle.
The lifting position scrambler is that angular encoder changes into displacement with the angle variation that gear rotates, and measure pulse corresponding with the gear rotating photo of scrambler generation and export, and a gear that rotates gear wheel under the photosensors record rotates the numeral number that produces, adopt the MCS51 singlechip technology, the output pulses switch that scrambler is produced becomes the actual displacement amount, the numeral number conversion of photoelectric sensor output is become the angle of actual rotation, detect the angle that controller is controlled the lifting distance of drive motor and tooth bar and rotated the rotation of gear wheel according to calibration cell, make it to arrive actual desired position.Adopt the RS232 mechanics of communication to be connected with host computer, so just direct control unit tool member is finished the detection of calibration cell according to JJF1030-2010 " calibration cell technical feature test specification " on computers again.
In the requirement of above-mentioned test specification, for the requirement of check point shown in annex 1, middle O point, four some ABCD are got on a upper plane, four some EFGH are got on next plane, test respectively.
The principle of work of this device is: detect begin the fixing thermometric platinum resistance with standard platinum resistance 1#(), 2#(moves the thermometric platinum resistance) insert respectively in center pit and the lifter rack through hole, according to tested object (calibration cell of different size) thus the position of mobile thermometric platinum resistance detent mechanism is adjusted in movement that can adjusting slider, namely determine the diameter of lower plane on the check point.Test beginning is read first fixedly thermometric platinum resistance (detecting centre O point) thermometer numerical value per minute and is read six times, reads 10min.Measure its fluctuation degree.Next run through mobile temp. assaying platinum resistance thermometer data and point of fixity thermometer data.The single-chip microcomputer that detects controller by calibration cell afterwards sends instruction, and rotary electric machine drives under the monitoring of photoelectric sensor and rotates the gear wheel dextrorotation and turn 90 degrees and again read two platinum resistance numerical value (reading is fixed thermometer → mobile thermometer → mobile thermometer → fixed thermometer → fixed thermometer → mobile thermometer → mobile thermometer → fixed thermometer sequentially).Afterwards, rotation gear wheel again dextrorotation turn 90 degrees reading, and afterwards rotary electric machine dextrorotation turn 90 degrees reading, measures upper horizontal plane temperature field uniformity.After a upper uniform plane property testing was complete, lifting motor drove lifter rack and moves 300mm under the monitoring of lifting position scrambler, repeat above-mentioned action, measured next plane temperature field uniformity.Whole test process finishes, and gets back to reference position.
The singlechip computer system that described calibration cell detects controller comprises three parts: displacement measurement, measurement of angle is with the upper machine communication parts.
The concrete steps that this device detects: will be detected calibration cell and be set to the lower limit temperature point, stablize 10min after reaching lower limit temperature, two standard platinum resistance thermometers are placed on respectively A point (holding movable thermometric platinum resistance) and O point (placing fixedly thermometric platinum resistance), according to the sample actual conditions lifting displacement is set, the anglec of rotation, sampling time is by the school temperature spot.After entering duty, carry out reset operation, comprise reset up and down and about reset.Then read calibration value, move up and down the corresponding numeral number of 300mm, the corresponding numeral number of left rotation and right rotation 270 degree.Begin again sampling, at first gather A point and the A-O according to this order Quick Acquisition of fixed thermometer → mobile thermometer → mobile thermometer → fixed thermometer → fixed thermometer → mobile thermometer → mobile thermometer → fixed thermometer of counting, data as test calibration cell fluctuation degree, gather simultaneously the data that O is ordered, with 10 seconds frequency collections 10 minutes.After A point and the collection of A-O point data were finished, control was rotated the gear wheel dextrorotation and is turn 90 degrees and arrive the B point, stablize 1min collection C point and C-O point data.Finish by that analogy the collection of each position temperature of plane A-B-C-D.After finishing the collection of D point and D-0 point data, control lifter rack decline 300mm stablizes the Temperature numerical that 1min collection H point and H-O are ordered.Afterwards control is rotated gear wheel and is rotated counterclockwise 90 degree arrival F points, stablizes 1min and gathers F point and F-O point data, finishes by that analogy the collection of next each position temperature of plane E-F-G-H.Then automatically reset.When finishing aforesaid operations, real time record is also carried out in test data and current mobile temp. assaying platinum resistance thermometer position.
The interior angle of web joint in the center of round bottom face that described side base plate links to each other with the center of round bottom face is acute angle, less than 90 degree, makes the slewing area of mobile thermometric platinum resistance can reach 270 degree.
Described cabinet below is provided with base, is placed on the constant temperature notch by described base, and base comprises up and down two parts, and upper section diameter is greater than lower section diameter.Added the calibration cell that base can mate different bore, different shape.
Through check, the technical indicator that this device can reach:
1) displacement control accuracy is better than 5mm.
2) angle range of control (0～270) degree, accuracy is better than 3 degree.
3) the manual measurement the data obtained with automatically measure institute's read data relatively, on the calibration cell, the lower horizontal plane maximum temperature difference, the moving degree of perform region maximum temperature difference and warm field wave error all≤0.002 ℃.
This covering device has been realized the detection of program control automatic calibration cell, device by PC control can be finished layouting up and down in effective temperature field in the testing process in full automatic mode, the collection of experimental data, calculate, the preservation of raw readings and printing, generate " .csv " format text and be connected the printing of finishing certificate with the 1ims system, easy and simple to handle directly perceived.Simultaneously, device also is provided with 3 limit switches, and protective effect has been played in the overshoot of cabinet lifting and rotation, makes device more safe and reliable.
Detect according to JJF 1030-2010 " calibration cell technical feature test specification " according to calibration cell, the experimental technique that detects manually exists artificial reading and the error of calculation and human cost large, and the work period is long, affects work efficiency.And can realize the manual operation full automation after adopting this covering device, and shorten the test duration, the accuracy of increasing work efficiency and layout, the accuracy of assurance raw data acquisition is simplified the operation of each link greatly, improves the ability of unloading.
Claims (7)
1. calibration cell automatic detection device, it is characterized in that: comprise the cabinet that is arranged on the calibration cell notch plane, end face and bottom surface part opening on the described cabinet, be used for the thermometric platinum resistance and inject the interior liquid of calibration cell, the cabinet bottom surface mainly is comprised of with the side base plate that temperature-measuring part is installed the round bottom face that is positioned on the notch, there is web joint at the center of described side base plate and round bottom face, the remainder of round bottom face is opening, web joint at round bottom face center is equipped with the rotation gear wheel, pinion wheel with described rotation gear wheel engagement is installed on the side base plate, pinion wheel is driven by rotary electric machine, the next door is equipped with photoelectric sensor, the monitoring counting rotates the rotation number of teeth of gear wheel, avris is equipped with mobile thermometric platinum resistance detent mechanism on the gear wheel end face rotating, described mobile thermometric platinum resistance detent mechanism comprises the lifter rack of vertically setting up, described lifter rack center is for inserting the through hole of mobile platinum resistance, mobile platinum resistance is passed through hole and is fixed, the lower end is immersed in the calibration cell, gear engagement on lifter rack and the lifting motor axle, drive the tooth bar rise and fall by lifting motor, the tooth bar another side is equipped with the scrambler of monitoring lifting position, the gear of described scrambler also meshes with lifter rack, the spindle central of described rotation gear wheel and round bottom face center are through hole, and fixedly thermometric platinum resistance is installed; Described rotary electric machine, photoelectric sensor, lifting motor and lifting position scrambler detect controller with calibration cell and are connected, and control and feed back rotational angle and the lifting position of mobile thermometric platinum resistance.
2. calibration cell automatic detection device as claimed in claim 1, it is characterized in that: described mobile thermometric platinum resistance detent mechanism is fixed on the slide block, be installed on the described rotation gear wheel by slide block, rotate on the gear wheel and have a chute from the circumference to the center of circle, described slide block embeds and is installed in the described chute, and can slide in chute and adjust the position of mobile thermometric platinum resistance.
3. calibration cell automatic detection device as claimed in claim 1 or 2, it is characterized in that: at described lifter rack downside the microswitch position-limit mechanism is installed, limit up and down stroke of lifter rack, on the base plate of described cabinet, also be provided with the microswitch position-limit mechanism, limit mobile thermometric platinum resistance rotational angle.
4. calibration cell automatic detection device as claimed in claim 1 or 2, it is characterized in that: the interior angle of web joint in the center of round bottom face that described side base plate links to each other with the center of round bottom face is acute angle.
5. calibration cell automatic detection device as claimed in claim 1 or 2 is characterized in that: described cabinet below is provided with base, is placed on the constant temperature notch by described base, and base comprises up and down two parts, and upper section diameter is greater than lower section diameter.
6. calibration cell automatic detection device as claimed in claim 5, it is characterized in that: described base bottom is divided into right cylinder.
7. calibration cell automatic detection device as claimed in claim 5, it is characterized in that: described base bottom is divided into the rectangular parallelepiped base plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220597120 CN202903360U (en) | 2012-11-13 | 2012-11-13 | Constant temperature groove automatic detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220597120 CN202903360U (en) | 2012-11-13 | 2012-11-13 | Constant temperature groove automatic detection device |
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| CN202903360U true CN202903360U (en) | 2013-04-24 |
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- 2012-11-13 CN CN 201220597120 patent/CN202903360U/en not_active Expired - Fee Related
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| CN112146788A (en) * | 2020-09-28 | 2020-12-29 | 广东韶钢松山股份有限公司 | Thermal resistance verification system and method |
| CN113654673B (en) * | 2021-08-18 | 2022-12-09 | 西安汉唐分析检测有限公司 | Quick temperature calibration method for thermostatic bath |
| CN113654673A (en) * | 2021-08-18 | 2021-11-16 | 西安汉唐分析检测有限公司 | Quick temperature calibration method for constant temperature bath |
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