CN103471301A - Constant refrigeration control circuit of handheld X-ray fluorescence spectrometer - Google Patents
Constant refrigeration control circuit of handheld X-ray fluorescence spectrometer Download PDFInfo
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- CN103471301A CN103471301A CN2013103940141A CN201310394014A CN103471301A CN 103471301 A CN103471301 A CN 103471301A CN 2013103940141 A CN2013103940141 A CN 2013103940141A CN 201310394014 A CN201310394014 A CN 201310394014A CN 103471301 A CN103471301 A CN 103471301A
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Abstract
The invention discloses a constant refrigeration control circuit of a handheld X-ray fluorescence spectrometer. The constant refrigeration control circuit comprises a sensor I/O (input/output) interface module. A connector of the sensor I/O interface module is connected with a positive input end of an operational amplifier in an amplification and filter circuit, the positive input end of the operational amplifier is connected with a resistor R3 and a capacitor C11 in parallel, the other end of the resistor R3 is connected with a voltage source, a negative input end of the operational amplifier is connected with a resistor R15 and a resistor R18 in parallel, the other end of the resistor R18 is connected with an output end of the operational amplifier, the output end of the operational amplifier is connected with a resistor R5, the resistor R5 is connected with a capacitor C12 and a resistor R6 in parallel, the resistor R6 is connected with a resistor R11, a capacitor C13 and a diode A1 in parallel, the other end of the capacitor C12, the other end of the resistor R11 and the other end of the capacitor C13 are grounded, and the diode A1 is connected with a refrigeration module in parallel. The constant refrigeration control circuit has the advantages that the constant refrigeration control circuit is novel in design and simple in structure, a constant refrigeration function can be realized for an SDD (silicon drift detector), and the electronic resolution can be improved.
Description
Technical field
The present invention relates to a kind of refrigeration circuit, what be specifically related to is the constant refrigeration control circuit of a kind of hand-held X-fluorescence spectrometer.
Background technology
The SDD detector is the core component of conventional Xray fluorescence spectrometer, is similar to photodiode, but it has adopted stagged electrode structure, and it can carry out the spectrometry of X ray under higher counting rate, but it needs constant refrigerating function.
Summary of the invention
The object of the invention is to overcome the above problem that prior art exists, provide a kind of hand-held X-fluorescence spectrometer constant refrigeration control circuit, can give the SDD detector constant refrigeration.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
The constant refrigeration control circuit of a kind of hand-held X-fluorescence spectrometer, comprise sensor I/O interface module, the TEMP port of the J6 connector of described sensor I/O interface module connects the positive input terminal of the operational amplifier in filtering and amplifying circuit, the positive input terminal of described operational amplifier be connected in parallel resistance R 3 and capacitor C 11, described resistance R 3 other ends connect voltage, the negative input end of described operational amplifier be connected in parallel resistance R 15 and R18, the described R18 other end connects the output of described operational amplifier, the output contact resistance R5 of described operational amplifier, described resistance R 5 be connected in parallel capacitor C 12 and resistance R 6, described resistance R 6 resistance R 11 that is connected in parallel, capacitor C 13 and diode A1, described capacitor C 12, resistance R 11 and capacitor C 13 other end ground connection, be connected in parallel 9 pin and the diode D3 of chip U1 of refrigeration module of described diode A1.
Further, 14 pin of the described chip U1 L1 that is connected in parallel, C3, C4, the described L1 other end connects power source voltage Vcc, described C3, C4 ground connection, 13 pin of described chip U1 connect 14 pin, 12 pin connect 14 pin by resistance R 2, 10 pin shunt capacitance C14 and the resistance R 9 of described chip U1, described resistance R 9 other ends connect capacitor C 17, the other end ground connection of described capacitor C 14 and described capacitor C 17, 6 pin of described chip U1 connect the rear ground connection of capacitor C 18, ground connection after 8 pin connecting resistance R20, 1 pin of described chip U1 is connected 5 pin with 2 pin by capacitor C 1, C8 is connected in parallel after the 2 pin connection L2 of described chip U1, C9, L3 and R7, the other end of described C8 and C9 is connected, described R7 be connected in parallel R17 and Q2, described L3 be connected in parallel C6 and C5, described C6 and C5 other end ground connection, 7 pin of the described chip U1 R8 that is connected in parallel, C7 and described C8, described R8 is connected rear by ground connection after R16 with the C7 other end.
The invention has the beneficial effects as follows:
Modern design of the present invention, simple in structure, constant refrigerating function is provided to the SDD detector, improved the resolution ratio of electronics.
The accompanying drawing explanation
The circuit diagram that Fig. 1 is module 1 and module 2;
The circuit diagram that Fig. 2 is module 3.
Number in the figure explanation: 1, sensor I/O interface module, 2, filtering and amplifying circuit, 3, refrigeration module.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Shown in Fig. 1, the constant refrigeration control circuit of a kind of hand-held X-fluorescence spectrometer, comprise sensor I/O interface module 1, the TEMP port of the J6 connector of described sensor I/O interface module 1 connects the positive input terminal of the operational amplifier in filtering and amplifying circuit 2, the positive input terminal of described operational amplifier be connected in parallel resistance R 3 and capacitor C 11, described resistance R 3 other ends connect voltage, the negative input end of described operational amplifier be connected in parallel resistance R 15 and R18, the described R18 other end connects the output of described operational amplifier, the output contact resistance R5 of described operational amplifier, described resistance R 5 be connected in parallel capacitor C 12 and resistance R 6, described resistance R 6 resistance R 11 that is connected in parallel, capacitor C 13 and diode A1, described capacitor C 12, resistance R 11 and capacitor C 13 other end ground connection, be connected in parallel 9 pin and the diode D3 of chip U1 of refrigeration module 3 of described diode A1.
Further, shown in Fig. 2, 14 pin of the described chip U1 L1 that is connected in parallel, C3, C4, the described L1 other end connects power source voltage Vcc, described C3, C4 ground connection, 13 pin of described chip U1 connect 14 pin, 12 pin connect 14 pin by resistance R 2, 10 pin shunt capacitance C14 and the resistance R 9 of described chip U1, described resistance R 9 other ends connect capacitor C 17, the other end ground connection of described capacitor C 14 and described capacitor C 17, 6 pin of described chip U1 connect the rear ground connection of capacitor C 18, ground connection after 8 pin connecting resistance R20, 1 pin of described chip U1 is connected 5 pin with 2 pin by capacitor C 1, C8 is connected in parallel after the 2 pin connection L2 of described chip U1, C9, L3 and R7, the other end of described C8 and C9 is connected, described R7 be connected in parallel R17 and Q2, described L3 be connected in parallel C6 and C5, described C6 and C5 other end ground connection, 7 pin of the described chip U1 R8 that is connected in parallel, C7 and described C8, described R8 is connected rear by ground connection after R16 with the C7 other end.
The operation principle of the present embodiment is as follows:
SDD detector output temperature voltage signal is nursed one's health in filtering and amplifying circuit, then by the signal after conditioning by the FB(current feedback signal) interface is connected in the DC-DC change-over circuit of LT3601EMSE composition, continuous carry out closed-loop control, finally export constant d. c. voltage signal to SDD detector refrigerating chip, realized constant refrigerating function.
The J6 connector is SDD detector output connection port, and Temp is the temperature signal network label that the SDD detector provides, and at this, with voltage system, means, this voltage signal is realized low-pass filter amplifier by the U2A chip;
:
Follow the variation of SDD detector temperature signal, be input to U1 feedback pin 9 pin, U1 carries out the adjusting of dutycycle according to chip internal;
Supply voltage, by LC low pass filter (L1, C3, C4) output signal, then is input to the power pins (Pin13 and Pin14 short circuit place) of chip U1, has improved the antijamming capability of this module; The output of U1, by secondary LC wave filter, is carried out the pulse signal of U1 output filtering and exports direct current signal.The first order: L2, C8, C9 form low pass filter; Second level L3, C5, C6 form low pass filter.Final output signal refrigeration voltage is freezed in the SDD detector, constantly like this carries out closed-loop control, until V
fB=Vmax, export constant voltage, finally can be by the refrigeration module constant control.
R7 and R17 carry out after dividing potential drop the input voltage as Q2, then control the emitter stage of Q2 and conducting and high resistant (disconnection) state of colelctor electrode, the colelctor electrode of Q2 is connected to U1(Pin12:RUN), the input signal of RUN is the Vcc(logical one like this) or the GND(logical zero), whether control this chip power needs to start.
8 pin of U1 connect a resistance to ground, set the internal work frequency of oscillation of this chip; The inner 3.3V voltage-stablizer of the 6 pin output pin of U1 is by capacitor C 18 ground connection.10 pin of the compensation pin of U1 by discrete component R9, with C17, connected and then with the C14 earth,
The 7th pin is the overvoltage signal; U1 chip the 5th pin FB, be current feedback signal, and the peak signal of feedback signal is Vmax.
Claims (2)
1. the constant refrigeration control circuit of hand-held X-fluorescence spectrometer, it is characterized in that: comprise sensor I/O interface module (1), the TEMP port of the J6 connector of described sensor I/O interface module (1) connects the positive input terminal of the operational amplifier in filtering and amplifying circuit (2), the positive input terminal of described operational amplifier be connected in parallel resistance R 3 and capacitor C 11, described resistance R 3 other ends connect voltage, the negative input end of described operational amplifier be connected in parallel resistance R 15 and R18, the described R18 other end connects the output of described operational amplifier, the output contact resistance R5 of described operational amplifier, described resistance R 5 be connected in parallel capacitor C 12 and resistance R 6, described resistance R 6 resistance R 11 that is connected in parallel, capacitor C 13 and diode A1, described capacitor C 12, resistance R 11 and capacitor C 13 other end ground connection, be connected in parallel 9 pin and the diode D3 of chip U1 of refrigeration module (3) of described diode A1.
2. the constant refrigeration control circuit of hand-held X-fluorescence spectrometer according to claim 1, it is characterized in that: 14 pin of the described chip U1 L1 that is connected in parallel, C3, C4, the described L1 other end connects power source voltage Vcc, described C3, C4 ground connection, 13 pin of described chip U1 connect 14 pin, 12 pin connect 14 pin by resistance R 2, 10 pin shunt capacitance C14 and the resistance R 9 of described chip U1, described resistance R 9 other ends connect capacitor C 17, the other end ground connection of described capacitor C 14 and described capacitor C 17, 6 pin of described chip U1 connect the rear ground connection of capacitor C 18, ground connection after 8 pin connecting resistance R20, 1 pin of described chip U1 is connected 5 pin with 2 pin by capacitor C 1, C8 is connected in parallel after the 2 pin connection L2 of described chip U1, C9, L3 and R7, the other end of described C8 and C9 is connected, described R7 be connected in parallel R17 and Q2, described L3 be connected in parallel C6 and C5, described C6 and C5 other end ground connection, 7 pin of the described chip U1 R8 that is connected in parallel, C7 and described C8, described R8 is connected rear by ground connection after R16 with the C7 other end.
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| CN201310394014.1A CN103471301B (en) | 2013-09-03 | 2013-09-03 | A kind of constant refrigeration control circuit of handheld X-ray fluorescence spectrometer |
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| CN201310394014.1A CN103471301B (en) | 2013-09-03 | 2013-09-03 | A kind of constant refrigeration control circuit of handheld X-ray fluorescence spectrometer |
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| CN103471301B CN103471301B (en) | 2016-03-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352984A (en) * | 2015-12-14 | 2016-02-24 | 山东航天电子技术研究所 | SDD (Silicon Drift Detector)-based X-ray fluorescence analysis system |
| CN112748353A (en) * | 2020-12-29 | 2021-05-04 | 烟台大学 | XPSI board fault diagnosis method for high-voltage generator |
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| CN2504615Y (en) * | 2001-11-09 | 2002-08-07 | 复旦大学 | Hand-held wavelength spectrometer |
| JP2004340589A (en) * | 2003-05-13 | 2004-12-02 | Fukui Masaya | Fluorescence detecting method and fluorescence detector |
| US20080305459A1 (en) * | 2006-11-30 | 2008-12-11 | Bwt Property, Inc. | Method for Real time Cure Status Monitoring of Dental Resin |
| CN201788941U (en) * | 2010-08-04 | 2011-04-06 | 江苏天瑞仪器股份有限公司 | Filament emission current stabilizing control circuit in mass spectrograph |
| CN102545608A (en) * | 2010-12-29 | 2012-07-04 | 中国科学院西安光学精密机械研究所 | Constant current source driving circuit and semiconductor cooler control system |
| CN203518377U (en) * | 2013-09-03 | 2014-04-02 | 周健 | Handheld X-ray fluorescence spectrophotometer constant-refrigeration control circuit |
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2013
- 2013-09-03 CN CN201310394014.1A patent/CN103471301B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2504615Y (en) * | 2001-11-09 | 2002-08-07 | 复旦大学 | Hand-held wavelength spectrometer |
| JP2004340589A (en) * | 2003-05-13 | 2004-12-02 | Fukui Masaya | Fluorescence detecting method and fluorescence detector |
| US20080305459A1 (en) * | 2006-11-30 | 2008-12-11 | Bwt Property, Inc. | Method for Real time Cure Status Monitoring of Dental Resin |
| CN201788941U (en) * | 2010-08-04 | 2011-04-06 | 江苏天瑞仪器股份有限公司 | Filament emission current stabilizing control circuit in mass spectrograph |
| CN102545608A (en) * | 2010-12-29 | 2012-07-04 | 中国科学院西安光学精密机械研究所 | Constant current source driving circuit and semiconductor cooler control system |
| CN203518377U (en) * | 2013-09-03 | 2014-04-02 | 周健 | Handheld X-ray fluorescence spectrophotometer constant-refrigeration control circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352984A (en) * | 2015-12-14 | 2016-02-24 | 山东航天电子技术研究所 | SDD (Silicon Drift Detector)-based X-ray fluorescence analysis system |
| CN112748353A (en) * | 2020-12-29 | 2021-05-04 | 烟台大学 | XPSI board fault diagnosis method for high-voltage generator |
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| CN103471301B (en) | 2016-03-09 |
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Effective date of registration: 20160912 Address after: Suzhou City, Jiangsu province 215343 Kunshan City Qiandeng Town No. 188 North Road, room 2 Shipu harvest Patentee after: Kunshan Shuhow Instrument Technology Co.,Ltd. Patentee after: Xu Rongwang Address before: 215000, 76, 1206, ideal home, hi tech Zone, Jiangsu, Suzhou Patentee before: Zhou Jian |