CN102857193A - Multichannel integral circuit module, multichannel circuit module group and spectrometer - Google Patents
Multichannel integral circuit module, multichannel circuit module group and spectrometer Download PDFInfo
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- CN102857193A CN102857193A CN201210309482XA CN201210309482A CN102857193A CN 102857193 A CN102857193 A CN 102857193A CN 201210309482X A CN201210309482X A CN 201210309482XA CN 201210309482 A CN201210309482 A CN 201210309482A CN 102857193 A CN102857193 A CN 102857193A
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Abstract
The invention discloses a multichannel integral circuit module, a multichannel circuit module group and a spectrometer. The multichannel integral circuit module provided by the invention comprises a plurality of photocurrent input channels, a plurality of integral and amplification circuit units, a processor unit and a module address coding unit, wherein a plurality of photocurrent input channels are respectively connected with respective integral and amplification circuit unit, and the outputs of all the integral and amplification circuit units are respectively connected with the processor unit. The module address coding unit is connected with the processor unit, and is used for setting the address information of the multichannel integral circuit modules, and the processor unit is used for collecting integral data of all the photocurrent input channels and reading the address information of the module address coding unit. The increase of the number of the channels can be realized by directly increasing the number of the multichannel integral circuit modules without redesigning an entire acquisition circuit. The multichannel integral circuit module has the advantages of high acquisition efficiency and easiness in integration.
Description
Technical field
The present invention relates to Anlysis of Emission spectrometry device field, relate in particular to multichannel integrating circuit module, multichannel integrating circuit module group and spectrometer.
Background technology
One meter or two meters grating spectrographs of arc excitation are important branch in the Atomic Emission Spectrometer AES device, the characteristics of this instrument can directly be analyzed the powdered samples such as soil, rock, sediments and high pure metal oxide in the geological sample, need not chemical digesting and dilution, thereby the content of having avoided clearing up some element in the rear solution is diluted the reduction sensitivity for analysis, but also very easily brings unmanageable pollution into.
For a long time, one meter or two meters grating spectrographs of arc excitation that China produces are carried out the analysis task that hundreds of thousands spare geochemical sample is arranged in the geochemical prospecting " the surface sweeping plan of the 1:5 ten thousand Methods of Regionals whole nation " every year in the whole nation, geology field, and measure 17～19 kinds of impurity contents in a large amount of high pure metal tungsten oxide, molybdenum oxide and other noble metal sample in coloured, the metallurgical system, therefore be used widely in the numerous laboratories of China.And one meter or two meters grating spectrographs of traditional arc excitation usually adopt phase-plate record, wash the flow processs such as phase, photometry and carry out spectrum analysis, its operation sequence is cumbersome, inefficiency, labour intensity is large and the drawback such as easy contaminated environment, therefore, users extremely expect the birth of novel arc excitation photo-electric direct reading spectrometer.
Arc excitation photo-electric direct reading spectrometer groundwork principle is: utilize interchange or direct-current arc light source that sample is inspired characteristic spectrum, characteristic spectrum is diffracted to the different wave length spectral line through the beam splitting system of concave grating, then this light signal is converted into the signal of telecommunication, after processing, the amplification of signal of telecommunication process and data obtain the sample experimental data, because the intensity of spectrum line and the content of different element become certain functional relation, therefore, by the sample experimental data being processed the content that can calculate tested element in the sample, this arc excitation photo-electric direct reading spectrometer has simple to operate, and the advantage such as operating efficiency height.
With the formal output of photoelectric current when light signal is converted into the signal of telecommunication, the size of photoelectric current changes with the characteristic spectral line light intensity, and characteristic spectral line light intensity temporal evolution has certain fluctuation, therefore, usually not the instantaneous value of measuring photoelectric current, but the method for employing integration, the integral voltage value of photoelectric current on electric capacity in record a period of time.In actual applications, the user requires from several to dozens of the analytical element number of channels, and the requirement of upper layer application aspect also is not quite similar, and the increase of number of channels can reduce the speed of data acquisition, integrating circuit that this just needs can fast integration, have multiple drainage pattern function.
Summary of the invention
Embodiments of the invention provide a kind of multichannel integrating circuit module, and collecting efficiency is high, is easy to integrated.
For achieving the above object, the embodiment of the invention provides following technical scheme:
A kind of multichannel integrating circuit module comprises:
A plurality of photoelectric current input channels, a plurality of integration and amplifier circuit unit, processor unit and module's address coding unit;
A plurality of photoelectric current passages are connected to respectively integration and amplifier circuit unit separately, and the output of each integration and amplifier circuit unit is connected to respectively processor unit;
The module's address coding unit is connected with processor unit, is used for arranging the address information of this multichannel integrating circuit module;
Processor unit, for the integration data that gathers each input channel, and the address information of reading address coding unit setting.
Alternatively, also comprise: relay, driver and self check current signal; Each photoelectric current input channel is connected to driver through one of relay respectively, and driver is connected to processor unit, the action of processor unit control driver drives relay, another termination self check current signal of relay.
Alternatively, the photoelectric current input channel is 8, and relay is 4 duplex relays, and each photoelectric current input channel is received respectively an end of duplex relay.
Alternatively, each integration and amplifier circuit unit comprise: the first operational amplifier, the second operational amplifier, the first resistance, the first inductance, the first electric capacity and analog switch; The photoelectric current input channel is connected to the first-phase input of the first operational amplifier through the first inductance, the second-phase input end grounding of the first operational amplifier, and the first-phase input of the first operational amplifier is connected to the output of the first operational amplifier through the first electric capacity; The output of the first operational amplifier is connected to the second-phase input of the second operational amplifier through the first resistance, the first-phase input of the second operational amplifier is connected to the output of the second operational amplifier; The two ends of the first electric capacity connect respectively a pair of break-make end of analog switch, and the control end of analog switch is connected to processor unit, the state of processor unit control simulation switch.
Alternatively, the second-phase input at the second operational amplifier is connected to voltage stabilizing didoe.
Alternatively, the module's address coding unit is toggle switch.
Alternatively, toggle switch is 8 toggle switchs.
Alternatively, the processor unit drainage pattern that gathers the integration data of each passage comprises the segmentation collection, gathers by frequency collection with by the free setting time.
In addition, the present invention also provides the multichannel integrating circuit module group that comprises a plurality of above-mentioned arbitrary multichannel integrating circuit modules, and each multichannel integrating circuit module is connected with host computer by the CAN bus.
In addition, the present invention also provides the spectrometer that comprises above-mentioned arbitrary multichannel integrating circuit module.
Multichannel integration module provided by the invention, each photoelectric current input channel correspondence integration and amplifier circuit unit separately, collecting efficiency is high, and be provided with the module's address coding unit, when port number increases, can directly realize by increasing the multichannel integration module, and need not to redesign whole Acquisition Circuit, the collecting efficiency of this multichannel integration module is high, is easy to integrated.
Further, at the relay of photoelectric current input channel connection by driver drives, relay is connected with the self check current signal, thereby realize the switching of self check current signal and integration test current signals, and realize easily the self check of whole module by the self check current signal, for test provides more reliable test environment.
Further, integration and amplifier circuit unit have adopted the design that comprises that analog switch cooperates with electric capacity, and the shape body by processing unit control simulation switch, like this, can come discharging and recharging of control capacitance by analog switch, and then, be convenient to integrated multiple drainage pattern, make more horn of plenty and convenient, the more intellectuality of application on its upper strata.
Description of drawings
Fig. 1 is the electrical block diagram according to the multichannel integrating circuit module of the embodiment of the invention;
Fig. 2 is the electrical block diagram of integration and amplifier circuit unit according to an embodiment of the invention;
Fig. 3 is the flow chart of subsection integral acquisition method according to an embodiment of the invention;
Fig. 4 is the flow chart of pressing according to an embodiment of the invention the frequency collection method;
Fig. 5 is the flow chart of free setting time acquisition method according to an embodiment of the invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
A lot of details have been set forth in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here and implement, those skilled in the art can be in the situation that do similar popularization without prejudice to intension of the present invention, so the present invention is not subjected to the restriction of following public specific embodiment.
As depicted in figs. 1 and 2, in this specific embodiment, in a photoelectric current integration module, photoelectric current input channel CH1-CH8 is 8, processor unit is SoC single-chip microcomputer 200, and this SoC single-chip microcomputer has a plurality of I/O mouths and built-in analog to digital converter (ADC).Certainly, be understandable that, the number of photoelectric current input channel only is example herein, can set according to concrete design needs the type of photoelectricity flow number and required processor unit, and the present invention is not limited to this.
After each road photoelectric current input channel connects respectively an integration and amplifier circuit unit 100, be linked into the I/O mouth with analog input function of SoC single-chip microcomputer 200, such as P3.0-3.7, that is to say, analog quantity behind 8 road photoelectric currents input process integration and the amplifying circuit is linked into respectively 8 data port of SoC single-chip microcomputer 200, the ADC that then, can call single-chip microcomputer 200 inside changes analog quantity in turn and gathers.Certainly, also can will be linked into the data port of single-chip microcomputer afterwards through analog to digital converter (scheming not shown) through the analog quantity behind integration and the amplifying circuit, the direct Collect conversion of single-chip microcomputer is the signal of digital quantity.
In the present embodiment, as shown in Figure 2, take photoelectric current input channel CH1 as example, each integration and amplifier circuit unit that is connected with the photoelectric current input channel comprises: the first operational amplifier 101, the second operational amplifier 105, the first resistance 107, the first inductance 101, the first electric capacity 102 and analog switch 106, photoelectric current input channel CH1 is connected to the first-phase input 103-1 of the first operational amplifier 103 through the first inductance 101, the second-phase input end grounding 103-2 of the first operational amplifier, the first-phase input 103-1 of the first operational amplifier is connected to the output of the first operational amplifier 103 through the first electric capacity 102; The output of the first operational amplifier 103 is connected to the second-phase input 105-2 of the second operational amplifier 105 through the first resistance 107, the first-phase input 105-1 of the second operational amplifier is connected to the output of the second operational amplifier 105; The two ends of the first electric capacity 102 meet respectively a pair of break-make end S1D1 of analog switch 106, the control end of analog switch is connected to processor unit 200, the state of processor unit 200 control simulation switches 106, among this embodiment, first-phase input 103-1, the 105-1 of operational amplifier are inverting input, and the second input 103-2,105-2 are normal phase input end.Wherein, after the photoelectric current input of photoelectric current input channel CH1, the effect that the first inductance 101 plays anti-fluctuation, stablizes input current, the first operational amplifier 103 and the first electric capacity 102 form current integration circuit, the second operational amplifier 105 forms voltage follower, reduce output impedance, reduce subsequent conditioning circuit to the impact of integral voltage.A pair of break-make end S1D1 at two termination analog switches 106 of the first electric capacity 102, the control end of analog switch 102 is received single-chip microcomputer 200, namely by the on off operating mode of Single-chip Controlling analog switch, controlling whole circuit by the break-make of this analog switch 106 is integration state or discharge condition, in the present embodiment, analog switch 106 is opened, and then circuit is in the integration state, analog switch 106 closures, then circuit is in discharge condition.More specifically, adopt the analog switch of two 4 passages among this embodiment, its IN end is connected to respectively the I/O mouth of single-chip microcomputer 200, such as P0.0-0.7.In addition, more preferably, be connected to a voltage stabilizing didoe 104 at the second-phase input 105-2 of the second operational amplifier 105, to play position-limiting action, namely carry out spacing to the voltage behind the integration.
In this embodiment, also be provided with the module that relay 6 and self check current signal 7 form, this relay 6 is connected to single-chip microcomputer 200 by driver 5, the instruction that single-chip microcomputer sends is to driver 5, thereby the on off state by driver 5 control relays 6, in this embodiment, adopt 4 duplex relays 6,8 road photoelectric current input channel CH1-CH8 receive respectively one on duplex relay and often open input, the normally closed input of duplex relay is also received self check current signal 7, in the present embodiment, self check current signal 7 by negative voltage (as-15V) serial connection one fixed resistance (such as 100k), one adjustable resistance (such as 10k) forms, form bleeder circuit, the input of current source picks out in the middle of fixed resistance and adjustable resistance, and adjustable resistance also connects an electric capacity.Can realize self check to whole integrating circuit module by this module, when relay 6 is in closure state, be input current source by the self check current signal, whether normal in order to the state that detects whole circuit, when driver is accepted the single-chip microcomputer signal and will be carried out the photoelectric current integration, the driver drives relay closes, thus photoelectric current enters integrating circuit from input channel CH1-CH7, has realized easily the switching of self check current signal and integration test current signals.
In the present invention, adopt module's address coding unit 3, be used for arranging the address information of this multichannel integration module, so that when a plurality of multichannel integration module integrate, the corresponding module of identification integration data.In the present embodiment, module's address coding unit 3 is toggle switch, can determine according to concrete module number the figure place of toggle switch, for example can be 8 toggle switch, be connected with the I/O mouth of single-chip microcomputer 200, by the height state of toggle switch manually is set, the state that single-chip microcomputer 200 reads toggle switch is used as the address information of this module.
For the integrating circuit module of this embodiment, be easy to integrated multiple integration drainage pattern, can switch according to instruction intelligence between multiple drainage pattern of host computer.Drainage pattern can comprise: the segmentation collection, press frequency collection and press the free setting time and gather.
The method that segmentation gathers namely within certain integration section time, constantly gathers the photoelectric current integration data of each passage in turn.This segmented acquisition approach has greatly been expanded the dynamic range of integrating circuit.During collection, the data that each passage collects are judged, greater than a certain numerical value, with regard to save data, then carried out the discharge of electric capacity, then continue to gather, then the multi collect data in this time period are superposeed.In a specific embodiment, change in turn and gather by the ADC0 that calls single-chip microcomputer inside, by 0 to 8 in the AMX0PRT register of ADC0 put 1 and write 1 to the AD0BUSY register and start the A/D conversion in turn, then read most-significant byte ADH register and least-significant byte ADL register and realize data acquisition, then make most-significant byte ADC0H multiply by decimal number 256 and add least-significant byte ADC0L, give the aray variable SUM of 32 of two bytes, finish a data acquisition, and carry out timing by timer internal T3, concrete steps are referring to Fig. 3, after carrying out initialization, at first, timer T3 begins timing, and analog switch is controlled all passages and opened, gather in turn the i channel data, most-significant byte ADH, least-significant byte ADL is if institute's image data is greater than 2560, then think once to gather and finish, this tunnels analogy switch closure, discharge 4us, and with data accumulation to this passage SUM[i], until arrive the scheduled time, stop to gather.
Press the method for frequency collection, namely gather by certain frequency, certain set time gathers a secondary data at every interval, this acquisition mode, the curve of spectrum scanning of suitable instrument, spectral line location etc.In a specific embodiment, timer T4 is used for frequency is set, and timer T3 arranges integration total time, with reference to shown in Figure 4, after carrying out initialization, frequency acquisition is set, the integration interval time arrives, and then gathers in turn the i channel data, most-significant byte ADH, least-significant byte ADL then closes the analog switch of all passages, and 4us discharges, and with data accumulation to each passage SUM[i], repeat integration, until arrive integration total time, then stop to gather.
The method that the free setting time gathers namely to corresponding different integration time started and the integration dwell times of each passage difference, like this, can be carried out integration for the characteristic of each passage, reduces the background spectral line, improves the sensitivity of analyzing.In a specific embodiment, after initialization, receive the integration time started Begin of each passage, integration concluding time End, and whether each passage of poll between time started Begin and integration concluding time End, if, gather this i channel data, most-significant byte ADH, least-significant byte ADL, if greater than 2560, then thinking once to gather, institute's image data finishes this tunnels analogy switch closure, discharge 4us, and with data accumulation to this passage SUM[i], until arrive the scheduled time, stop to gather.
Above specific embodiment to multichannel integration module of the present invention is described in detail, in addition, the present invention also provides the multichannel integration module group that is comprised of above-mentioned arbitrarily multichannel integration module, realizes easily the expansion of port number by the increase of module.For example, in one embodiment, when 24 input channels of needs, can be formed by the integration module of three 8 passages of above-described embodiment, module's address coding unit by each integration module comes for each module address identification message to be set, each module can realize being connected with host computer by the CAN bus, for example by the communication of bus interface 400 realizations with host computer, and need not to redesign the integrating circuit of 24 input channels, realize easily the expansion of passage, simultaneously, each passage correspondence integrating circuit separately, when passage increases, realize equally high efficiency collection.
In addition, the present invention also provides and has used above-mentioned multichannel integration module or the spectrometer of module, realizes having high efficiency and the spectrometer of the integrating circuit being convenient to expand.
Although the present invention discloses as above with preferred embodiment, yet is not to limit the present invention.Any those of ordinary skill in the art, do not breaking away from the technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention according to any simple modification, equivalent variations and the modification that technical spirit of the present invention is done above embodiment, all still belongs in the scope of technical solution of the present invention protection.
Claims (10)
1. a multichannel integrating circuit module is characterized in that, comprising:
A plurality of photoelectric current input channels, a plurality of integration and amplifier circuit unit, processor unit and module's address coding unit;
A plurality of photoelectric current passages are connected to respectively integration and amplifier circuit unit separately, and the output of each integration and amplifier circuit unit is connected to respectively processor unit;
The module's address coding unit is connected with processor unit, is used for arranging the address information of this multichannel integrating circuit module;
Processor unit, for the integration data that gathers each input channel, and the address information of reading address coding unit setting.
2. multichannel integrating circuit module according to claim 1 is characterized in that, also comprises:
Relay, driver and self check current signal;
Each photoelectric current input channel is connected to driver through one of relay respectively, and driver is connected to processor unit, the action of processor unit control driver drives relay, another termination self check current signal of relay.
3. multichannel integrating circuit module according to claim 2 is characterized in that, the photoelectric current input channel is 8, and relay is 4 duplex relays, and each photoelectric current input channel is received respectively an end of duplex relay.
4. multichannel integrating circuit module according to claim 1 is characterized in that, each integration and amplifier circuit unit comprise: the first operational amplifier, the second operational amplifier, the first resistance, the first inductance, the first electric capacity and analog switch;
The photoelectric current input channel is connected to the first-phase input of the first operational amplifier through the first inductance, the second-phase input end grounding of the first operational amplifier, and the first-phase input of the first operational amplifier is connected to the output of the first operational amplifier through the first electric capacity; The output of the first operational amplifier is connected to the second-phase input of the second operational amplifier through the first resistance, the first-phase input of the second operational amplifier is connected to the output of the second operational amplifier; The two ends of the first electric capacity connect respectively a pair of break-make end of analog switch, and the control end of analog switch is connected to processor unit, the state of processor unit control simulation switch.
5. multichannel integrating circuit module according to claim 4 is characterized in that, is connected to voltage stabilizing didoe at the second-phase input of the second operational amplifier.
6. multichannel integrating circuit module according to claim 4 is characterized in that, the drainage pattern that processor unit gathers the integration data of each passage comprises the segmentation collection, gathers by frequency collection with by the free setting time.
7. multichannel integrating circuit module according to claim 1 is characterized in that, the module's address coding unit is toggle switch.
8. multichannel integrating circuit module according to claim 7 is characterized in that, toggle switch is 8 toggle switchs.
9. multichannel integrating circuit module group comprises a plurality ofly such as each described multichannel integrating circuit module among the claim 1-8, and each multichannel integrating circuit module is connected with host computer by the CAN bus.
10. a spectrometer comprises such as each described multichannel integrating circuit module among the claim 1-8.
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