CN104467682A - Down converter capable of achieving temperature detection - Google Patents
Down converter capable of achieving temperature detection Download PDFInfo
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- CN104467682A CN104467682A CN201410549922.8A CN201410549922A CN104467682A CN 104467682 A CN104467682 A CN 104467682A CN 201410549922 A CN201410549922 A CN 201410549922A CN 104467682 A CN104467682 A CN 104467682A
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- frequency mixer
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Abstract
The invention discloses a down converter capable of achieving temperature detection. The down converter comprises a passive filter, a prime amplifier, a prime frequency mixer, a filter, a secondary amplifier, a frequency mixer and a final amplifier in a sequentially connected mode. A four-stage amplifier and a temperature sensor are connected to the prime frequency mixer at the same time. A frequency synthesizer is connected to the four-stage amplifier and further connected with a power divider. A temperature sensor and a three-stage amplifier are further connected to the frequency mixer. The three-stage amplifier is further connected with a phase locker which is further connected with the power divider. Through the principle, a stable local vibration source can be provided for a down-conversion channel, so the down converter capable of achieving temperature detection can well achieve control over power frequency, and the purpose of stable control over the rotating speed of an AC motor is achieved. Meanwhile, as the temperature sensors are further arranged, the temperature change conditions of important components in the down converter capable of achieving temperature detection can be monitored, and then the important components can be cooled in time; in this way, the reliability of devices is improved, and the service life of the devices is prolonged.
Description
Technical field
The present invention relates to frequency converter field, be specifically related to the low-converter that can realize temperature detection.
Background technology
In recent years, along with the fast development of microwave device, in radar and the communications field, receiving system generally have employed low noise amplifier as prime, greatly reduces system noise factor, improves sensitivity.The influence and effect fact of frequency mixer to receiving system is really not so.For single-sideband system, the single-sideband system that particularly intermediate frequency is lower, radial noise can bring very large impact to noise.Therefore wider at low noise amplifier frequency band and in the single-sideband system that intermediate frequency is not high, still need to use frequency mixer, and in frequency mixer, also comprise the low-converter that can realize temperature detection.The low-converter that can realize temperature detection that now uses cannot provide stable local vibration source for down-conversion passage, and the low-converter making it possible to realize temperature detection well can not change supply frequency, reaches the object of stability contorting alternating current machine rotating speed.Frequency converter will produce certain power consumption as a kind of current transformer in running.Owing to using device different, control mode is different, and different brands, the power consumption that the frequency converter of different size produces also is not quite similar.And the reliability of frequency converter and temperature are inverse ratio, therefore how to realize the heat radiation to frequency converter, reduce temperature rise, improve the reliability of device, thus the useful life of extension device, seem particular importance.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, the low-converter that can realize temperature detection is provided, stable local vibration source can be provided for down-conversion passage, the low-converter making it possible to realize temperature detection well can realize the control to supply frequency, reach stability contorting alternating current machine rotating speed, also arrange simultaneously for monitor can realize temperature detection low-converter in the temperature variations of vitals, in time it is lowered the temperature, improve the reliability of device, extend the useful life of device.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: the low-converter that can realize temperature detection, comprise the passive filter, pre-amplifier, prime frequency mixer, filter, two-stage amplifier, frequency mixer and the final amplifier that connect successively, described prime frequency mixer also connects level Four amplifier and temperature sensor simultaneously, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer also connects temperature sensor and third stage amplifier, and third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter.
This low-converter that can realize temperature detection uses prime frequency mixer and these two frequency mixers of frequency mixer to realize down-conversion by secondary mixing.Frequency synthesizer and local vibration source can provide stable signal for down-conversion passage, stabilization signal encourages generation one band frequency signal f1-f2 at frequency synthesizer through power splitter DDS, and the stabilization signal that local vibration source produces produces through power splitter DDS excitation and through the phase locking frequency multiplying of phase locking unit the point frequency secondary local oscillation signal that frequency is L1.The downstream signal frequencies inputted from passive filter is f3-f4, the mixing that this signal realizes outputing signal with mixing synthesizer f1-f2 by prime frequency mixer produces the fixed intermediate frequency signal that frequency is L2, this intermediate-freuqncy signal and two local oscillation frequency signal L1 produce the intermediate-freuqncy signal of standard by the mixing of frequency mixer, then export.This device can provide stable local vibration source for down-conversion passage, and the low-converter making it possible to realize temperature detection well can realize the control to supply frequency, reaches stability contorting alternating current machine rotating speed.On the critical piece prime frequency mixer and frequency mixer of this device, go back set temperature transducer simultaneously, realize the detection of temperature, once it is too high to find that temperature raises, in time it is lowered the temperature, ensure its normal effective work, improve the reliability of device, extend the useful life of device.
Described power splitter also connects the local vibration source that 10MHz signal is provided.The local vibration source of this signal can meet frequency synthesizer power output and the signal of coming from passive filter produce 720MHz intermediate-freuqncy signal by mixing, and the signal making last output is intermediate-freuqncy signal.
Described passive filter is LC type passive filter.LC type passive filter is installed additional before the low-converter that can realize temperature detection, filter high order harmonic component, suppress interference source, avoid higher harmonic wave that the leakage current of frequency converter output cable is increased, the situation of motor-output deficiency is occurred, improves the reliability of device.
Described passive filter is also connected with input signal.
Described final amplifier is also connected with output signal.
Described temperature sensor is water proof type temperature sensor.Avoid being subject to moisture effects and having influence on useful life.
Compared with prior art, the invention has the beneficial effects as follows:
1, this device can provide stable local vibration source for down-conversion passage, and the low-converter making it possible to realize temperature detection well can realize the control to supply frequency, reaches stability contorting alternating current machine rotating speed; On the critical piece prime frequency mixer and frequency mixer of this device, go back set temperature transducer simultaneously, realize the detection of temperature, once it is too high to find that temperature raises, in time it is lowered the temperature, ensure its normal effective work, improve the reliability of device, extend the useful life of device.
2, passive filter is LC type passive filter, LC type passive filter is installed additional before the low-converter that can realize temperature detection, filter high order harmonic component, suppress interference source, avoid higher harmonic wave that the leakage current of frequency converter output cable is increased, the situation of motor-output deficiency is occurred, improves the reliability of device.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated, and embodiments of the invention are not limited thereto.
Embodiment 1:
As shown in Figure 1, the present invention includes the passive filter, pre-amplifier, prime frequency mixer, filter, two-stage amplifier, frequency mixer and the final amplifier that connect successively, described prime frequency mixer also connects level Four amplifier and temperature sensor simultaneously, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer also connects temperature sensor and third stage amplifier, and third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter.
This low-converter that can realize temperature detection uses prime frequency mixer and these two frequency mixers of frequency mixer to realize down-conversion by secondary mixing.Frequency synthesizer and local vibration source can provide stable signal for down-conversion passage, stabilization signal encourages generation one band frequency signal f1-f2 at frequency synthesizer through power splitter DDS, and the stabilization signal that local vibration source produces produces through power splitter DDS excitation and through the phase locking frequency multiplying of phase locking unit the point frequency secondary local oscillation signal that frequency is L1.The downstream signal frequencies inputted from passive filter is f3-f4, the mixing that this signal realizes outputing signal with mixing synthesizer f1-f2 by prime frequency mixer produces the fixed intermediate frequency signal that frequency is L2, this intermediate-freuqncy signal and two local oscillation frequency signal L1 produce the intermediate-freuqncy signal of standard by the mixing of frequency mixer, then export.This device can provide stable local vibration source for down-conversion passage, and the low-converter making it possible to realize temperature detection well can realize the control to supply frequency, reaches stability contorting alternating current machine rotating speed.Passive filter wherein realizes carrying out Frequency mixing processing to passing to prime frequency mixer after input signal filter and amplification again, by the frequency signal after the mixing of prime frequency mixer in the filtering again of device after filtering with pass to frequency mixer after amplifying and carry out secondary mixing, signal transacting better effects if.On the critical piece prime frequency mixer and frequency mixer of this device, go back set temperature transducer simultaneously, realize the detection of temperature, once it is too high to find that temperature raises, in time it is lowered the temperature, ensure its normal effective work, improve the reliability of device, extend the useful life of device.
Embodiment 2:
The present embodiment preferred concrete structure on the basis of above-described embodiment is as follows: power splitter also connects the local vibration source providing 10MHz signal.
Described passive filter is LC type passive filter.LC type passive filter is installed additional before the low-converter that can realize temperature detection, filter high order harmonic component, suppress interference source, avoid higher harmonic wave that the leakage current of frequency converter output cable is increased, the situation of motor-output deficiency is occurred, improves the reliability of device.
Described passive filter is also connected with input signal.
Described final amplifier is also connected with output signal.
Described temperature sensor is water proof type temperature sensor.
Just this invention can be realized as mentioned above.
Claims (6)
1. can realize the low-converter of temperature detection, it is characterized in that: comprise the passive filter, pre-amplifier, prime frequency mixer, filter, two-stage amplifier, frequency mixer and the final amplifier that connect successively, described prime frequency mixer also connects level Four amplifier and temperature sensor simultaneously, level Four amplifier is gone back rate of connections synthesizer, and frequency synthesizer is also connected with power splitter; Described frequency mixer also connects temperature sensor and third stage amplifier, and third stage amplifier is also connected with phase locking unit, and phase locking unit is also connected with power splitter.
2. the low-converter that can realize temperature detection according to claim 1, is characterized in that: described power splitter also connects the local vibration source providing 10MHz signal.
3. the low-converter that can realize temperature detection according to claim 1, is characterized in that: described passive filter is LC type passive filter.
4. the low-converter that can realize temperature detection according to claim 1, is characterized in that: described passive filter is also connected with input signal.
5. the low-converter that can realize temperature detection according to claim 1, is characterized in that: described final amplifier is also connected with output signal.
6. the low-converter that can realize temperature detection according to claim 1, is characterized in that: described temperature sensor is water proof type temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549922.8A CN104467682A (en) | 2014-10-17 | 2014-10-17 | Down converter capable of achieving temperature detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549922.8A CN104467682A (en) | 2014-10-17 | 2014-10-17 | Down converter capable of achieving temperature detection |
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| CN104467682A true CN104467682A (en) | 2015-03-25 |
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| CN201410549922.8A Pending CN104467682A (en) | 2014-10-17 | 2014-10-17 | Down converter capable of achieving temperature detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106527273A (en) * | 2016-12-02 | 2017-03-22 | 安徽波维电子科技有限公司 | DSP chip-based intelligent temperature-controllable high-frequency tuner |
Citations (5)
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|---|---|---|---|---|
| CN101009491A (en) * | 2006-01-27 | 2007-08-01 | 络达科技股份有限公司 | Emitter with temperature compensation gain |
| CN201290105Y (en) * | 2008-10-14 | 2009-08-12 | 福建先创电子有限公司 | High frequency band restraining selector |
| CN101908896A (en) * | 2009-06-03 | 2010-12-08 | 中国科学院微电子研究所 | Multi-band radio frequency receiver |
| CN103338048A (en) * | 2013-05-28 | 2013-10-02 | 桂林电子科技大学 | Reception method and unit of radio frequency front end of cognitive spectrum sensing receiver |
| CN204156815U (en) * | 2014-10-17 | 2015-02-11 | 绵阳雷迪创微电子科技有限公司 | Low-converter |
-
2014
- 2014-10-17 CN CN201410549922.8A patent/CN104467682A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009491A (en) * | 2006-01-27 | 2007-08-01 | 络达科技股份有限公司 | Emitter with temperature compensation gain |
| CN201290105Y (en) * | 2008-10-14 | 2009-08-12 | 福建先创电子有限公司 | High frequency band restraining selector |
| CN101908896A (en) * | 2009-06-03 | 2010-12-08 | 中国科学院微电子研究所 | Multi-band radio frequency receiver |
| CN103338048A (en) * | 2013-05-28 | 2013-10-02 | 桂林电子科技大学 | Reception method and unit of radio frequency front end of cognitive spectrum sensing receiver |
| CN204156815U (en) * | 2014-10-17 | 2015-02-11 | 绵阳雷迪创微电子科技有限公司 | Low-converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106527273A (en) * | 2016-12-02 | 2017-03-22 | 安徽波维电子科技有限公司 | DSP chip-based intelligent temperature-controllable high-frequency tuner |
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Application publication date: 20150325 |