Control method for time standard equipment and time standard equipment
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A control method and time standard technology, applied in the control of time standard equipment, the field of time standard equipment, can solve the problem that the frequency cannot be locked in the atomic ground state, etc.
Active Publication Date: 2015-04-01
JIANGHAN UNIVERSITY
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Problems solved by technology
[0006] In order to solve the problem that the existing technology cannot lock the frequency on the atomic ground state hyperfine 0-0 ce
Method used
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Embodiment 1
[0066] An embodiment of the present invention provides a control method of a time standard device, see figure 1 , the control method includes:
[0067] Step 101: The voltage-controlled crystal oscillator outputs an original frequency signal.
[0068] Step 102: The electronic circuit performs frequency multiplication and frequency mixing on the original frequency signal to generate a microwave inquiry signal.
[0069] In an implementation manner of this embodiment, step 102 may include:
[0070] An integrated module in the electronic circuit generates an integrated modulation signal;
[0071] The microwave frequency multiplication and mixing module in the electronic circuit simultaneously performs frequency multiplication and frequency mixing on the original frequency signal and the integrated modulation signal to generate a microwave inquiry signal.
[0072] In another implementation manner of this embodiment, before step 102, the control method may further include:
[007...
Embodiment 2
[0114] An embodiment of the present invention provides a time standard device, see Figure 4 , the time standard equipment includes:
[0115] A voltage-controlled crystal oscillator 201, used to output the original frequency signal;
[0116] The electronic circuit 202 is used to perform frequency multiplication and frequency mixing on the original frequency signal to generate a microwave inquiry signal;
[0117] The physical system 203 is configured to discriminate the frequency of the microwave interrogation signal to generate an optical detection signal;
[0118] The servo module 204 is used to perform frequency-selective amplification, square-wave shaping, and synchronous phase detection on the optical detection signal, and generate a first deviation correction voltage to act on the voltage-controlled crystal oscillator 201;
[0119] Temperature measurement circuit 205, used to obtain the temperature of the working environment of the time standard equipment;
[0120] GPS r...
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Abstract
The invention discloses a control method for time standard equipment and the time standard equipment and belongs to the time standard technology field. The method comprises steps that, an original frequency signal is outputted by a voltage controlled crystal oscillator; frequency multiplication and frequency mixing of the original frequency signal are carried out by an electronic line to generate a microwave probing signal; frequency demodulation of the microwave probing signal is carried out by a physics system to generate a light detection signal; frequency selection amplification, square wave shaping and synchronization phase demodulation of the light detection signal are carried out by a servo module to generate a first error correcting voltage which acts on the voltage controlled crystal oscillator; the work environment temperature of the time standard equipment is acquired by a temperature measuring circuit; a GPS signal is received by a GPS receiver; the original frequency signal is contrasted with the GPS signal by a frequency contrasting module to acquire frequency difference of the original frequency signal and the GPS signal; a second error correcting voltage which is generated by the servo module according to the temperature and the frequency difference acts on the voltage controlled crystal oscillator. According to the control method, the output frequency of the voltage controlled crystal oscillator does not generate large-scope change caused by temperature change.
Description
technical field [0001] The invention relates to the technical field of time standards, in particular to a control method of time standard equipment and the time standard equipment. Background technique [0002] The atomic frequency standard is a device that provides standard frequency and time, that is, a time standard device. The rubidium atomic frequency standard has become the most widely used atomic frequency standard because of its small size, low power consumption and good ability to withstand harsh environments. It also has good indicators and can meet the needs of most military and civil projects. It can be used in engineering fields such as early warning aircraft, fighter aircraft, electronic countermeasures, third-generation mobile communication technology networks, and power monitoring. [0003] Existing atomic frequency standards include voltage-controlled crystal oscillators, physical systems, electronic circuits, and servo modules. Among them, the voltage-con...
Claims
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Application Information
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