CN101477070A - Quenching medium cooling characteristics tester - Google Patents
Quenching medium cooling characteristics tester Download PDFInfo
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- CN101477070A CN101477070A CNA2009100291148A CN200910029114A CN101477070A CN 101477070 A CN101477070 A CN 101477070A CN A2009100291148 A CNA2009100291148 A CN A2009100291148A CN 200910029114 A CN200910029114 A CN 200910029114A CN 101477070 A CN101477070 A CN 101477070A
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- quenching medium
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Abstract
The invention provides a tester for the cooling characteristics of quenching media, which comprises a thermocouple amplification module with cold junction compensation, a noise reduction module, a single chip microcomputer, a data memory, a keyboard and a display, wherein the input end of the thermocouple amplification module with cold junction compensation is connected with the output end of a thermocouple; the output end of the thermocouple amplification module with cold junction compensation is connected with the input end of the noise reduction module; the output end of the noise reduction module is connected with the data input end of the single chip microcomputer; the storage end of the single chip microcomputer is connected with the data memory; the control input end of the single chip microcomputer is connected with the keyboard; and the display output end of the single chip microcomputer is connected with the display. The tester can calculate cooling speed in real time, and has the advantages of visual calculation result display, large information storage amount and fast convenient data transmission.
Description
Technical field
The present invention relates to a kind of cooling characteristics instrument, especially a kind of precision height, intuitive display realizes the hardening media cooling characteristics instrument that cooling rate numerical value calculates in real time, specifically a kind of quenching medium cooling characteristics tester.
Background technology
At present, common quenching medium cooling characteristics tester adopts electronic integrator to realize the computing function of cooling velocity mostly both at home and abroad, because it is very responsive that cooling velocity is calculated the sample temperature value, electronic integrator is before carrying out cooling velocity calculating, temperature characteristics is not carried out digital filtering and differentiate, cooldown rate value that obtains and the temperature variant family curve of cooling velocity are accurate inadequately, can accurately not reflect the cooling characteristics of medium.And existing quenching medium cooling characteristics tester adopts printer and digital display tube as user interface usually, and its intuitive is poor, must the signal of control operations sign indicating number show to carry out when the user operates, and uses loaded down with trivial detailsly, not directly perceived, and makes mistakes easily.In addition, existing hardening media cooling characteristics instrument storage space is little, adopt the interface of serial line interface as instrument and PC communication usually, but on present most notebooks and the part desktop computer, all cancelled serial equipment, this brings the deuce to pay for undoubtedly the use of cooling characteristics tester, and communication speed is slow, has brought inconvenience to data transmission.Therefore, existing quenching medium cooling characteristics tester does not have real-time calculating cooling velocity, intuitively shows result of calculation, and the big and data transmission requirement easily of information memory capacity can not be satisfied the needs that have production technology now.
Summary of the invention
The cooling velocity that the objective of the invention is to exist at existing quenching medium cooling characteristics tester is calculated untimely, the intuitive that result of calculation shows is poor, little and the slow problem of data rate of information memory capacity, propose a kind ofly can calculate cooling velocity in real time, the result of calculation that shows directly perceived, the big and data transmission of information memory capacity is quenching medium cooling characteristics tester easily.
Technical scheme of the present invention is:
A kind of quenching medium cooling characteristics tester, it is characterized in that it comprises the thermocouple amplification module of being with cold junction compensation, noise reduction module, single-chip microcomputer, data-carrier store, keyboard and display, the signal input part of the thermocouple amplification module of band cold junction compensation links to each other with the signal output part of the thermopair of quenching medium cooling characteristics tester probe segment as the signal input of quenching medium cooling characteristics tester, the signal output part of the thermocouple amplification module of band cold junction compensation links to each other with the signal input part of noise reduction module, the signal output part of noise reduction module connects the data-signal input end of single-chip microcomputer, the storage signal end of single-chip microcomputer links to each other with data-carrier store, the signal input end of single-chip microcomputer links to each other with keyboard, and the demonstration output terminal of single-chip microcomputer links to each other with the signal input part of display.
The general-purpose serial bus USB output terminal of single-chip microcomputer of the present invention links to each other with computer.
The present invention also comprises acousto-optic hint equipment, and acousto-optic hint equipment comprises LED display lamp and hummer, and the cue output terminal of single-chip microcomputer links to each other with the respective signal input end of acousto-optic hint equipment.
Quenching medium cooling characteristics tester of the present invention provides working power by power module for the corresponding work module.
Noise reduction module of the present invention comprises capacitor C, inductance L and resistance R, one end of resistance R is as the signal output part of the thermocouple amplification module of the signal input part tape splicing cold junction compensation of noise reduction module, the other end of resistance R connects an end of capacitor C and inductance L respectively, the other end ground connection of capacitor C, the other end of inductance L connect the data-signal input end of single-chip microcomputer as the signal output of noise reduction module.
Beneficial effect of the present invention:
1, the present invention relies on the powerful computing power of single-chip microcomputer, can realize the real-time calculating of cooling velocity numerical value.Because the calculating of cooling velocity is very responsive to the sample temperature value, single-chip microcomputer carries out digital filtering to temperature characteristics before carrying out cooling velocity calculating, subsequently filtered temperature characteristics is carried out Numerical Value Derivative, the numerical value and the temperature variant family curve of cooling velocity that obtain cooling velocity are accurate in real time, the reliability height.
2, the present invention adopts LCD display to constitute user interface, uses the form of EFR STK, finishes the test parameter setting by test setting guide, and not only friendly interface is directly perceived, and is difficult for makeing mistakes.The thermopair measured temperature and the test result of probe all are presented on the LCD display in real time, and convenience of the present invention is good, and is workable.
3, the present invention tests the gained data and is stored under Single-chip Controlling in the data-carrier store FLASH chip, and can be stored on the computer by the general-purpose serial bus USB signal output part.Instrument adopts large capacity data memory FLASH chip, can preserve to surpass 512 times test data, for user's on-the-spot test provides very large degree of freedom.
4, the present invention adopts the general-purpose serial bus USB that generally uses at present as communication interface, not only can be connected communication with computer easily, and on communication speed far above serial line interface.
5, the present invention has multiple prompting and warning device, at first has test to show on the user interface of display, also has the acousto-optic hint equipment that is made of light-emitting diode display and hummer, is used for reminding test beginning, end of test (EOT) and instrument failure.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Fig. 2 is the circuit diagram of noise reduction module of the present invention.
Fig. 3 is the circuit diagram of power module of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of quenching medium cooling characteristics tester, it comprises the thermocouple amplification module (model can be AD595AQ) of being with cold junction compensation, noise reduction module, single-chip microcomputer (can adopt the SOC single-chip microcomputer, model can be C8051F340), data-carrier store (adopts the FLASH storer, model can be at45db801), keyboard and display (adopting 4.2 inches LCD display), the signal input part of the thermocouple amplification module of band cold junction compensation links to each other with the signal output part of the thermopair of quenching medium cooling characteristics tester probe segment as the signal input of quenching medium cooling characteristics tester, the signal output part of the thermocouple amplification module of band cold junction compensation links to each other with the signal input part of noise reduction module, the signal output part of noise reduction module connects the data-signal input end of single-chip microcomputer, the storage signal end of single-chip microcomputer links to each other with data-carrier store, the signal input end of single-chip microcomputer links to each other with keyboard, and the demonstration output terminal of single-chip microcomputer links to each other with the signal input part of display.The general-purpose serial bus USB signal output part of single-chip microcomputer links to each other with computer.The present invention also comprises acousto-optic hint equipment, and acousto-optic hint equipment comprises LED display lamp and hummer, and the cue output terminal of single-chip microcomputer links to each other with the respective signal input end of acousto-optic hint equipment.
The thermocouple amplification module (model can be AD595AQ) of band cold junction compensation of the present invention adopts the special-purpose amplifier circuit of thermopair of band cold junction compensation that the output signal of K type thermocouple is amplified, and the typical amplifying circuit that constitutes with AD595AQ is achieved.Adopt the 12V power supply that AD595AQ is powered, can guarantee that circuit when thermopair works between 0～1200 degree, amplifies and cold junction compensation the output signal of thermopair.
Single-chip microcomputer of the present invention (can adopt the SOC single-chip microcomputer, model can be C8051F340) be a complete SOC system, have 10bit high-speed ADC, USB controller, high speed 8051 micro-kernels, larger capacity program FLASH and precise clock source etc., its high workload clock frequency is considerably beyond the 80C51 series monolithic, instruction execution cycle is the core processor of quenching medium cooling characteristics tester main frame also much smaller than the 80C51 series monolithic.At first, utilize built-in high-speed ADC that input voltage signal is sampled, analog signal conversion become binary code because voltage signal has been represented the temperature of thermocouple, obviously, this binary code also just corresponding some temperature values.Because inevitably there is noise in test environment, even behind noise filter circuit, still can not ignore The noise.When AD sampled, the method that adopts repeatedly sampling to average reduced The noise.
Quenching medium cooling characteristics tester of the present invention provides working power by power module for the corresponding work module.As shown in Figure 3, power module adopts commutation diode and filter capacitor that the 220V mains supply is carried out producing the 12V direct supply by current rectifying and wave filtering circuit rectifying and wave-filtering commonly used, adopt voltage transitions chip IC 2 (model can be AOZ1010) subsequently, the 12V direct supply is transformed into the 5V direct supply of stablizing and having better current load ability, adopts voltage transitions chip IC 3 (model can be LM1117-3.3V) to convert the 5V direct supply to stable and the little 3.3V direct supply of ripple again.Wherein, the thermocouple amplification module (model can be AD595AQ) of the band cold junction compensation in the 12V direct-current power supply probe handle, 5V direct-current power supply display, keyboard, hummer, LED display lamp and USB (universal serial bus) are the USB mouth, (can adopt the SOC single-chip microcomputer 3.3V supply with single-chip microcomputer, model can be C8051F340) and data-carrier store (adopt the FLASH storer, model can be at45db801).
Noise reduction module of the present invention adopts passive elements such as electric capacity, inductance and resistance to constitute the noise filtering network, and input voltage signal is carried out filtering, effectively reduces signal noise.As shown in Figure 2, noise reduction module comprises capacitor C, inductance L and resistance R, one end of resistance R is as the signal output part of the thermocouple amplification module of the signal input part tape splicing cold junction compensation of noise reduction module, the other end of resistance R connects an end of capacitor C and inductance L respectively, the other end ground connection of capacitor C, the other end of inductance L connect the data-signal input end of single-chip microcomputer as the signal output of noise reduction module.
Keyboard of the present invention adopts 4 * 4 matrix keyboards that are made of 16 mini buttons, and such 16 keyboards only need 8 I/O IO mouths to finish, and have saved IO mouth resource greatly.The scanning sequence of matrix keyboard is than the scanning sequence complexity of parallel keyboard, and sweep time is also slightly long, but concerning the powerful SOC single-chip microcomputer (model can be C8051F340) of performance, can accomplish keyboard response timely and effectively fully.
Claims (5)
1, a kind of quenching medium cooling characteristics tester, it is characterized in that it comprises the thermocouple amplification module of being with cold junction compensation, noise reduction module, single-chip microcomputer, data-carrier store, keyboard and display, the signal input part of the thermocouple amplification module of band cold junction compensation links to each other with the signal output part of the thermopair of quenching medium cooling characteristics tester probe segment as the signal input of quenching medium cooling characteristics tester, the signal output part of the thermocouple amplification module of band cold junction compensation links to each other with the signal input part of noise reduction module, the signal output part of noise reduction module connects the data-signal input end of single-chip microcomputer, the storage signal end of single-chip microcomputer links to each other with data-carrier store, the signal input end of single-chip microcomputer links to each other with keyboard, and the demonstration output terminal of single-chip microcomputer links to each other with the signal input part of display.
2, quenching medium cooling characteristics tester according to claim 1 is characterized in that the general-purpose serial bus USB output terminal of described single-chip microcomputer links to each other with computer.
3, quenching medium cooling characteristics tester according to claim 1, it is characterized in that described quenching medium cooling characteristics tester also comprises acousto-optic hint equipment, acousto-optic hint equipment comprises LED display lamp and hummer, and the cue output terminal of single-chip microcomputer links to each other with the respective signal input end of acousto-optic hint equipment.
4, quenching medium cooling characteristics tester according to claim 1 is characterized in that described quenching medium cooling characteristics tester provides working power by power module for the corresponding work module.
5, quenching medium cooling characteristics tester according to claim 1, it is characterized in that described noise reduction module comprises capacitor C, inductance L and resistance R, one end of resistance R is as the signal output part of the thermocouple amplification module of the signal input part tape splicing cold junction compensation of noise reduction module, the other end of resistance R connects an end of capacitor C and inductance L respectively, the other end ground connection of capacitor C, the other end of inductance L connect the data-signal input end of single-chip microcomputer as the signal output of noise reduction module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100291148A CN101477070A (en) | 2009-01-13 | 2009-01-13 | Quenching medium cooling characteristics tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100291148A CN101477070A (en) | 2009-01-13 | 2009-01-13 | Quenching medium cooling characteristics tester |
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| CN101477070A true CN101477070A (en) | 2009-07-08 |
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| CNA2009100291148A Pending CN101477070A (en) | 2009-01-13 | 2009-01-13 | Quenching medium cooling characteristics tester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819747A (en) * | 2015-05-27 | 2015-08-05 | 成都德麦科技有限公司 | Wireless wall-type temperature-and-humidity transmitter |
| CN111398336A (en) * | 2020-02-27 | 2020-07-10 | 南京科润工业介质股份有限公司 | Quenching medium cooling performance's on-line monitoring system |
-
2009
- 2009-01-13 CN CNA2009100291148A patent/CN101477070A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819747A (en) * | 2015-05-27 | 2015-08-05 | 成都德麦科技有限公司 | Wireless wall-type temperature-and-humidity transmitter |
| CN111398336A (en) * | 2020-02-27 | 2020-07-10 | 南京科润工业介质股份有限公司 | Quenching medium cooling performance's on-line monitoring system |
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Open date: 20090708 |