CN207216326U - A kind of multichannel time sequence control device based on DDS - Google Patents
A kind of multichannel time sequence control device based on DDS Download PDFInfo
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- CN207216326U CN207216326U CN201720333572.0U CN201720333572U CN207216326U CN 207216326 U CN207216326 U CN 207216326U CN 201720333572 U CN201720333572 U CN 201720333572U CN 207216326 U CN207216326 U CN 207216326U
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- constant temperature
- dds
- multichannel
- signal
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Abstract
It the utility model is related to a kind of multichannel time sequence control device based on DDS, including DDS module, multichannel sequence generation module, thermostat module and one-chip computer module；The multichannel sequence generation module is suitable to produce modulation, reference, detection, the road clock signal of temperature control four under the control of the single-chip microcomputer；The DDS module is suitable to produce dominant frequency signal output under the control of the modulated signal to user terminal；The thermostat module is suitable to provide stationary temperature environment under the control of the temperature signal for user terminal；The reference is used to return to single-chip microcomputer in itself with detection signal, and the single-chip microcomputer is further adapted for handling the feedback information of user terminal by the detection signal in the case where reference signal acts on.Pass through implementation of the present utility model, so that the temperature coefficient of the practical frequency signal of user terminal is improved, management of the art of this patent to multichannel sequential is depended on simultaneously, closure servo circuit environment is constructed, user terminal will be allowd to obtain the very high temporal frequency signal of the degree of accuracy.
Description
Technical field
It the utility model is related to clock signal export technique field, and in particular to a kind of multichannel SECO based on DDS
Device.
Background technology
Many devices need the metastable signals of essence to be controlled in the market, how accurate stable signal is defeated
The topic into current awfully hot door is gone out.For the order output of signal, now more is controlled with sequential, at present
During produce pulse sequence method be the computer program write using Labview, this software has more intuitively figure
Observation, program debugging output is just write by software, while acousto-optic modulator and machinery are controlled by digital simulation (D/A) board
Switch is switched on and off.The advantages of this method is that this software is software through pictures, and the requirement ratio to programming personnel is not high.Lack
Point is not translating into machine language program needs more, and the speed of service is slow, is reacted in the case where multichannel is with different sequential exports
It is slower.
Above mentioned problem, have to be solved.
Utility model content
The technical problems to be solved in the utility model is：It is proposed a kind of to control the generation of the small sequential of light pulse to make letter
The multichannel time sequence control device of number precisely stable output.
The utility model is to solve the technical scheme that above-mentioned technical problem proposes to be：A kind of multichannel sequential control based on DDS
Device processed, including DDS module, multichannel sequence generation module, thermostat module and one-chip computer module；
The multichannel sequence generation module is suitable to produce modulation, reference, detection, temperature control four under the control of the single-chip microcomputer
Road clock signal；
The DDS module is suitable to produce dominant frequency signal output under the control of the modulated signal to user terminal；
The thermostat module is suitable to provide stationary temperature environment under the control of the temperature signal for user terminal；
The reference is used to return to single-chip microcomputer in itself with detection signal, and the single-chip microcomputer is further adapted for making in the reference signal
The feedback information of user terminal is handled by the detection signal with lower.
Further, the controlled end of the temperature control modules is suitable to receive the temperature signal,
The temperature control modules are by the constant temperature wall that surrounds on four sides and closed off at the top of the constant temperature wall and bottom
Constant temperature lid, the hexahedron structure that forms of constant temperature bottom, user environment module is fixed on inside the temperature control modules, the perseverance
It is all provided with being laid with shielding metal leve on the medial surface at warm bottom, constant temperature lid and constant temperature wall,
The constant temperature bottom is provided with user environment module fixing screws, and the constant temperature bottom is internally provided with warming resistance, institute
The both sides for stating constant temperature bottom are respectively provided with a photoinduction sensor for being served only for detecting constant temperature bottom light leak respectively,
The middle part of the constant temperature lid is provided with a wire hole only for threading, and enamel-cover electric induced line is introduced in wire hole, described
Enamel-cover electric induced line is connected to the user environment module, and the constant temperature covers to be made provided with a heating resistance, the temperature signal
For the heating resistance, the both sides of the constant temperature lid are also respectively provided with a photoinduction sensor for being served only for detecting light intensity respectively.
Further, the MCLK termination external clock references of the DDS module, the FSELECT ends of the DDS module are modulation
Signal input part.
Further, PSEL0, PSEL1 of the DDS module are the phase adjusted end of two paths of signals frequency F1, F0, described
PSEL0, PSEL1 are grounded.
Further, FSYNC, SCLK, SDATA end of the DDS module are serial communication end.
Further, the constant temperature bottom, constant temperature lid and constant temperature wall are that pcb board material is made.
The beneficial effects of the utility model are：
Pass through implementation of the present utility model so that the temperature coefficient of the practical frequency signal of user terminal is improved, simultaneously
Dependent on management of the art of this patent to multichannel sequential, closure servo circuit environment is constructed, user terminal will be allowd to obtain
The very high temporal frequency signal of the degree of accuracy.
Brief description of the drawings
The multichannel time sequence control device of the present utility model based on DDS is described further below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the multichannel time sequence control device based on DDS in the utility model；
Fig. 2 is the end pin connection diagram of DDS module in the utility model；
Fig. 3 is DDS and extraneous serial communication timing diagram；
The structural representation of Fig. 4 thermostat modules；
Fig. 5 is the structural representation at constant temperature bottom；
Fig. 6 is the structural representation of constant temperature lid；
Fig. 7 is the waveform diagram of four road square waves produced by single-chip microcomputer.
Embodiment
According to Fig. 1, the utility model includes a kind of multichannel time sequence control device based on DDS, including DDS module,
Multichannel sequence generation module, thermostat module and one-chip computer module.
The multichannel sequence generation module is suitable to produce modulation, reference, detection, temperature control four under the control of the single-chip microcomputer
Road clock signal.
The DDS module is suitable to produce dominant frequency signal output under the control of the modulated signal to user terminal.
The thermostat module is suitable to provide stationary temperature environment under the control of the temperature signal for user terminal.
The reference is used to return to single-chip microcomputer in itself with detection signal, and the single-chip microcomputer is further adapted for making in the reference signal
The feedback information of user terminal is handled by the detection signal with lower.
As shown in Fig. 2 the MCLK termination external clock references of the DDS module, believe DDS IOUT pin output ends frequency
Number stability it is consistent with external clock reference.DDS chips for inside without PLL frequency multiplication links, when usual MCLK ends input
Zhong Yuan frequency should be higher than that 4 times of IOUT ends output signal frequency, if output signal frequency is 5MHz, then MCLK clock ends
Signal frequency should be more than 20MHz, it is expected to obtain more preferable phase noise, after filtered external circuit, can be compared
Pure signal spectrum.
The FSELECT ends of the DDS module are modulated signal input, have two frequency control registers inside DDS, are led to
The mode for crossing programming preserves the frequency value F 0 pre-set, F1 in a register, when FSELECT ends have square-wave signal defeated
Fashionable (i.e. level rising edge or trailing edge conversion), DDS IOUT ends will be read from frequency control register respectively therewith
F1 or F0 value can keep the phase of signal unchanged as output.
PSEL0, PSEL1 of the DDS module be two paths of signals frequency F1, F0 phase adjusted end, the PSEL0,
PSEL1 is grounded.FSYNC, SCLK, SDATA end of the DDS module are serial communication end.The sequential of its serial communication such as Fig. 3 institutes
Show.
When FSYNC is high level, SCLK, SDATA pins are high-impedance state.When FSYNC is low level, DDS will locate
In communication state, when now pin SCLK has the pulse of a trailing edge, the DATA for making to hang on data/address bus SDATA is write
DDS data buffer zones, until during final DATA write-ins, DDS will make according to the condition selecting F1 or F0 on pin FSELECT
For the output at IOUT ends.
For inside without PLL times of frequency module DDS chip, the external clock frequency of pin MCLK inputs is the clock of system
Frequency, exemplified by exporting 5MHz frequency signals, MCLK input end of clock signal frequency is 20MHz.There are 2 32 inside DDS
Frequency control register（F0、F1）, in above-mentioned serial communication sequential, DATA positions should be 32.It follows that in this MCLK
During outside input clock frequency 20MHz, AD9832 minimum frequency resolution is：
When IOUT exports 20MHz, the value of corresponding 32 bit frequency control register is all 1；When exporting 5MHz, corresponding number
It is worth and is（5MHz/20MHz）* 232, resulting decimal value is converted into the corresponding 32 bit frequency control registers of binary system
Value.According to serial communication sequential, corresponding 32 place value is written in corresponding frequency control register by single-chip microcomputer（Such as
F0）.32 place values also can be written to corresponding frequency by same principle, the another way single-frequency of modulation by similar method
In control register（Such as F1）.By the height for changing DDS pin FSELECT level, it is possible to realize F0, F1 frequency internally
Between switching, so as to export keying FM signal.The signal for wherein changing pin FSELECT level is produced by single-chip microcomputer.
The controlled end of the temperature control modules is suitable to receive the temperature signal.As shown in figure 4, the temperature control mould
Block is to be made up of the constant temperature wall 1 that surrounds on four sides and closing off at the constant temperature lid 2 of the top of constant temperature wall 1 and bottom, constant temperature bottom 3
Hexahedron structure, the user environment module is fixed on inside the temperature control modules, the constant temperature bottom 3, the and of constant temperature lid 2
It is all provided with being laid with shielding metal leve 4 on the medial surface of constant temperature wall 1.
As shown in figure 5, the constant temperature bottom 3 is provided with user environment module fixing screws 5, the inside of constant temperature bottom 3 is set
There is warming resistance 6, the both sides at the constant temperature bottom 3 are respectively provided with a light sensation inductive sensing for being served only for detecting light leak at constant temperature bottom 3 respectively
Device 7.
As shown in fig. 6, the middle part of the constant temperature lid 2 is provided with a wire hole only for threading, enamel-cover electricity is introduced in wire hole
The line of induction 8, the enamel-cover electric induced line 8 are connected to the user environment module, and the constant temperature is covered provided with a heating resistance 9.
The temperature signal acts on the heating resistance 9, and the both sides of the constant temperature lid 2 are also respectively provided with one and are served only for detecting light intensity respectively
Photoinduction sensor 7.It can be used as preferably：The constant temperature bottom 3, constant temperature lid 2 and constant temperature wall 1 are that pcb board material is made.
The output of the road square wave of a Timer Controlling four in single-chip microcomputer, Fig. 7 are the ripples of four road square waves produced by single-chip microcomputer
Shape schematic diagram.By adjusting corresponding duty cycle parameters, square wave is set to be exported by certain low and high level requirement, during counter overflow
Square wave level can saltus step.After completing a cycle level saltus step, sequential returns to starting point and restarts level saltus step.First via square wave
（Modulated signal）Originated with high level, other three tunnels（Synchronous, detection, temperature control）It is initiated with low level.
It is of the present utility model to be not limited to above-described embodiment, the technical scheme of above-mentioned each embodiment of the present utility model that
This can form new technical scheme with combined crosswise, and all technical schemes formed using equivalent substitution, all fall within this practicality in addition
In the protection domain of new requirement.
Claims (6)
- A kind of 1. multichannel time sequence control device based on DDS, it is characterised in that：Including DDS module, multichannel sequence generation module, Thermostat module and one-chip computer module；The controlled end of the multichannel sequence generation module is connected to the control terminal of the single-chip microcomputer, and it has modulation, reference, inspection Survey, the road clock signal output end of temperature control four；The modulated signal output end of the multichannel sequence generation module is connected to the controlled end of the DDS module, the DDS module Dominant frequency signal output to user terminal；The thermostat module is suitable to provide stationary temperature environment under the control of the temperature control clock signal for user terminal；The reference is used to return to single-chip microcomputer in itself with detection signal, and the output end with reference to detection signal is connected to described The signal input part of single-chip microcomputer, the feedback of the information end of the user terminal are connected to the information input terminal of the single-chip microcomputer, the list Piece machine is configured to handle the feedback information of the user terminal.
- 2. the multichannel time sequence control device based on DDS according to claim 1, it is characterised in that：The thermostat module by End is controlled to be suitable to receive the temperature signal,The thermostat module be by the constant temperature wall that surrounds on four sides and close off at the top of the constant temperature wall and the constant temperature lid of bottom, The hexahedron structure that constant temperature bottom is formed, user environment module is fixed on inside the thermostat module, the constant temperature bottom, constant temperature lid and It is all provided with being laid with shielding metal leve on the medial surface of constant temperature wall,The constant temperature bottom is provided with user environment module fixing screws, and the constant temperature bottom is internally provided with warming resistance, the perseverance The both sides at warm bottom are respectively provided with a photoinduction sensor for being served only for detecting constant temperature bottom light leak respectively,The middle part of the constant temperature lid is provided with a wire hole only for threading, and enamel-cover electric induced line, the enamel-cover are introduced in wire hole Electric induced line is connected to the user environment module, and the constant temperature is covered provided with a heating resistance, the both sides of the constant temperature lid A photoinduction sensor for being served only for detecting light intensity is respectively provided with respectively.
- 3. the multichannel time sequence control device based on DDS according to claim 2, it is characterised in that：The MCLK of the DDS module External clock reference is terminated, the FSELECT ends of the DDS module are modulated signal input.
- 4. the multichannel time sequence control device based on DDS according to claim 3, it is characterised in that：The DDS module PSEL0, PSEL1 are the phase adjusted end of two paths of signals frequency F1, F0, PSEL0, PSEL1 ground connection.
- 5. the multichannel time sequence control device based on DDS according to claim 4, it is characterised in that：The DDS module FSYNC, SCLK, SDATA end are serial communication end.
- 6. the multichannel time sequence control device based on DDS according to claim 5, it is characterised in that：The constant temperature bottom, constant temperature lid It is that pcb board material is made with constant temperature wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720333572.0U CN207216326U (en) | 2017-03-31 | 2017-03-31 | A kind of multichannel time sequence control device based on DDS |
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| CN201720333572.0U CN207216326U (en) | 2017-03-31 | 2017-03-31 | A kind of multichannel time sequence control device based on DDS |
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| CN207216326U true CN207216326U (en) | 2018-04-10 |
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| CN201720333572.0U Expired - Fee Related CN207216326U (en) | 2017-03-31 | 2017-03-31 | A kind of multichannel time sequence control device based on DDS |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112265653A (en) * | 2020-09-30 | 2021-01-26 | 北京空间飞行器总体设计部 | Spacecraft autonomous thermal control method based on power balance |
-
2017
- 2017-03-31 CN CN201720333572.0U patent/CN207216326U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112265653A (en) * | 2020-09-30 | 2021-01-26 | 北京空间飞行器总体设计部 | Spacecraft autonomous thermal control method based on power balance |
| CN112265653B (en) * | 2020-09-30 | 2022-07-01 | 北京空间飞行器总体设计部 | Spacecraft autonomous thermal control method based on power balance |
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Granted publication date: 20180410 Termination date: 20190331 |