CN211293246U - Micro-deformation remote measuring system based on wireless synchronization technology - Google Patents
Micro-deformation remote measuring system based on wireless synchronization technology Download PDFInfo
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Abstract
The utility model relates to a micro deformation remote measuring system based on wireless synchronization technology, this system comprises a plurality of monitoring points and survey website. The monitoring point is composed of a spread spectrum modulation frequency multiplication forwarding circuit and a wireless synchronous pulse receiving circuit; the station is composed of a spread spectrum demodulation displacement resolving circuit and a wireless synchronous pulse transmitting circuit. The station generates and sends a radio frequency carrier signal and a wireless synchronous pulse signal to a monitoring point; the monitoring point receives the radio frequency carrier signal to carry out frequency multiplication processing, extracts a wireless synchronous pulse signal, generates a monitoring point pseudo code, carries out spread spectrum modulation on the radio frequency carrier signal after frequency multiplication, and transmits the radio frequency carrier signal to a station to be detected; the station uses the frequency-doubled radio frequency carrier signal as a local oscillation signal to carry out orthogonal down-conversion on the echo signal, uses a second pseudo code generating circuit to regenerate a pseudo code signal of a monitoring point under the control of a synchronous pulse signal output by a wireless synchronous pulse transmitting circuit, carries out related de-spreading on a baseband signal, and calculates the displacement of each monitoring point.
Description
Technical Field
The utility model belongs to the technical field of large building micro deformation measures, a micro deformation remote sensing system based on wireless synchronization technology is related to.
Background
Large buildings such as towers, high buildings, bridges, dams and the like can deform in use, and deformation measurement is a basic method for exploring a deformation mechanism and is an important means for danger early warning. Patent CN101349753A proposes a deformation telemetry technique for large buildings, the whole measuring system is composed of a plurality of beacons installed on the object to be measured and a remote telemetry receiver, and the basic working principle is as follows: the beacon machine uses different pseudo codes to modulate carrier signals with same frequency and phase, the beacon machine radiates radio frequency signals to the telemetering receiver, the telemetering receiver receives mixed spread spectrum modulation signals sent by the beacon machine, after pseudo codes are synchronized, the carrier signals of the beacon machines are separated, phase discrimination is carried out on the carrier signals, and deformation of buildings can be monitored. The problems of the method in practical use are as follows: (1) each beacon needs to use a common local oscillation signal and needs to be connected with each other by using a cable; in addition, a reference beacon machine needs to be installed on a reference point far away from a deformation area, so that the use is inconvenient; (2) the circuit of the telemetering receiver is complex, and the circuit fails to work when the pseudo code is unlocked, so that the displacement of each observation point cannot be measured.
Therefore, an efficient and accurate micro-deformation measurement technology for large buildings is urgently needed at present to realize the micro-deformation condition measurement for various buildings.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a micro deformation remote measurement system based on wireless synchronization technique, this measurement system can accurate efficient carry out real-time supervision to the building micro deformation, and the monitoring precision that exists among the prior art can be effectively solved is not high, and equipment is complicated scheduling problem.
Specifically, the method comprises the following technical scheme:
a micro-deformation remote measuring system based on wireless synchronization technology is composed of a plurality of monitoring points (1) arranged on a measured object and a remote measuring station (2);
the monitoring point (1) is composed of a spread spectrum modulation frequency multiplication forwarding circuit (11) and a wireless synchronous pulse receiving circuit (12); the station (2) is composed of a spread spectrum demodulation displacement resolving circuit (21) and a wireless synchronous pulse transmitting circuit (22);
the station (2) generates a radio frequency local oscillator signal with a frequency fR1As a radio frequency carrier signal and transmits the signal to a monitoring point (1)Shooting; the station (2) sends a wireless synchronization pulse signal to the monitoring point (1) by using a wireless synchronization pulse transmitting circuit (22); the monitoring point (1) carries out frequency multiplication processing on the received radio frequency carrier signal to obtain a carrier signal after coherent frequency conversion, wherein the frequency of the carrier signal is fR2＝2fR1(ii) a The wireless synchronization pulse receiving circuit (12) extracts a first synchronization pulse signal (1109), under the control of the synchronization pulse signal, a first pseudo code generating circuit (1108) is used for generating a pseudo code signal for identifying a monitoring point, the pseudo code signal is used for carrying out spread spectrum modulation on a carrier signal after coherent frequency conversion, and then the carrier signal is transmitted to a station (2); the measuring station (2) receives the echo signal transmitted by the monitoring point (1) and the frequency is fR1The local radio frequency local oscillator signal is subjected to frequency multiplication to obtain a frequency fR2＝2fR1The radio frequency local oscillation signal is used for carrying out orthogonal down-conversion on the echo signal from the monitoring point (1) received by the station under test (2) and converting the echo signal into a baseband signal; the station (2) outputs a second synchronous pulse signal (2212) by using a wireless synchronous pulse transmitting circuit (22), under the control of the synchronous pulse signal, a monitoring point pseudo code signal is regenerated by using a second pseudo code generating circuit (2110), then the baseband signal obtained by the orthogonal frequency converter is subjected to related despreading, and then the baseband signal is sent to a spread spectrum demodulation displacement resolving circuit (21) to calculate the displacement of the monitoring point.
Furthermore, the spread spectrum modulation frequency multiplication forwarding circuit (11) is composed of a first dual-frequency antenna (1101), a first band-pass filter (1102), a first low noise amplifier (1103), a first frequency multiplier (1104), a mixer (1105), a second band-pass filter (1106), a second power amplifier (1107) and a first pseudo code generating circuit (1108); the first pseudo code generating circuit (1108) is controlled by a first synchronous pulse signal (1109);
wherein: the first dual-frequency antenna (1101) is connected with a first band-pass filter (1102), a first low-noise amplifier (1103) and a first frequency multiplier (1104) in sequence, signals enter the first low-noise amplifier (1103) after being filtered by the first band-pass filter (1102), are sent to the mixer (1105) after passing through the first frequency multiplier (1104), are mixed with pseudo codes generated by a first pseudo code generating circuit (1108) in the mixer (1105), are output to a second band-pass filter (1106), and are amplified by a second power amplifier (1107) and then are sent.
Furthermore, the spread spectrum demodulation displacement resolving circuit (21) is composed of a second dual-frequency antenna (2101), a third power amplifier (2102), a third band-pass filter (2103), a radio frequency local oscillation source (2104), a second frequency multiplier (2105), a fourth band-pass filter (2106), a fourth low noise amplifier (2107), an orthogonal frequency down-converter (2108), a correlation despreading circuit (2109), a second pseudo code generating circuit (2110) and a displacement amount calculating circuit (2111), wherein the second pseudo code generating circuit (2110) is controlled by a second synchronization pulse signal (2112);
wherein: the radio frequency local vibration source (2104) is sequentially connected with the third band-pass filter (2103), the third power amplifier (2102) and the second dual-frequency antenna (2101), and a radio frequency carrier signal generated by the radio frequency local vibration source (2104) is filtered and amplified and then radiated out through the second dual-frequency antenna (2101); the second dual-frequency antenna (2101) is connected with a fourth band-pass filter (2106), a fourth low-noise amplifier (2107) and a quadrature down converter (2108) in sequence, and an echo signal received by the second dual-frequency antenna (2101) is sent to the quadrature down converter (2108) after being filtered and amplified; a radio frequency carrier generated by a radio frequency local vibration source (2104) is sent to an orthogonal down converter (2108) after passing through a second frequency multiplier (2105) to obtain a baseband signal and is sent to a related despreading circuit (2109), a second pseudo code generating circuit (2110) locally regenerates a pseudo code signal of a monitoring point and sends the pseudo code signal to the related despreading circuit (2109), and the related despreading circuit (2109) carries out related despreading processing on the baseband signal and then inputs the baseband signal to a displacement calculation circuit (2111).
Further, the wireless synchronization pulse receiving circuit (12) is composed of a receiving antenna (1201), a power divider (1202), a fifth band-pass filter (1203), a fifth low-noise amplifier (1204), a first envelope detector (1205), a sixth band-pass filter (1206), a sixth low-noise amplifier (1207), a second envelope detector (1208), a comparator (1209), a lead matching filter (1210), an output matching filter (1211), a lag matching filter (1212), a synchronization pulse decision circuit (1213), and a first delay circuit (1214); the fifth low noise amplifier (1204) sends out a first synchronous pulse signal (1109);
wherein: after a signal is received by a receiving antenna (1201), the signal enters a power divider (1202), the signal is divided into two paths, one path of signal passes through a fifth band-pass filter (1203), a fifth low-noise amplifier (1204) and a first envelope detector (1205), the other path of signal passes through a sixth band-pass filter (1206), a sixth low-noise amplifier (1207) and a second envelope detector (1208), the two paths of signal enter a comparator (1209), the signal output from the comparator (1209) passes through a lead matching filter (1210), an output matching filter (1211) and a lag matching filter (1212) and then enters a synchronous pulse judgment circuit (1213), and the output signal of the synchronous pulse judgment circuit (1213) enters a first delay circuit (1214).
Further, the wireless synchronization pulse transmitting circuit (22) is composed of a transmitting antenna (2201), a combiner (2202), a first switch (2203), a first carrier generator (2204), a third pseudo code generating circuit (2205), an inverting circuit (2206), a second switch (2207), a second carrier generator (2208), a synchronization pulse generating circuit (2209) and a second delay circuit (2210); the second delay circuit (2210) outputs a second synchronization pulse signal (2212);
wherein: the first carrier wave generator (2204) is connected with the first switch (2203), and the second carrier wave generator (2208) is connected with the second switch (2207); the synchronous pulse generating circuit (2209) is respectively connected with the second delay circuit (2210) and the third pseudo code generating circuit (2205); the third pseudo code generating circuit (2205) is connected with the first switch (2203) and is connected with the second switch (2207) through the inverting circuit (2206); the first switch (2203) and the second switch (2207) are respectively connected with the combiner (2202), and signals are finally sent out through the transmitting antenna (2201) after passing through the combiner (2202).
Further, the pseudo code is an m-sequence or Gold code.
The beneficial effects of the utility model reside in that: (1) each monitoring point is an independent active forwarding circuit, cable connection is not needed between the monitoring points and the station to be tested, and a monitoring point circuit is not needed to be installed on a reference point, so that the flexibility of the system is improved; (2) the monitoring point and the station point use the synchronous pulse signal to realize the pseudo code synchronization, a closed-loop pseudo code tracking loop is not needed, and the reliability of the system is improved; (3) the monitoring point and the station point adopt different frequency receiving and transmitting technology, thus effectively solving the problem of sending and receiving crosstalk of the continuous wave radar, and leading the system to have the advantage of long measuring distance.
Drawings
In order to make the purpose, technical scheme and beneficial effect of the utility model clearer, the utility model provides a following figure explains:
FIG. 1 is a schematic view of a measurement system of the present invention;
fig. 2 is a block diagram of the spread spectrum modulation frequency multiplication forwarding circuit of the present invention;
FIG. 3 is a block diagram of the spread spectrum demodulation displacement calculating circuit of the present invention;
fig. 4 is a block diagram of the structure of the wireless synchronization pulse receiving circuit of the present invention;
fig. 5 is a block diagram of the structure of the wireless synchronization pulse transmitting circuit of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The utility model provides a micro deformation remote measuring system based on wireless synchronization technology comprises a plurality of monitoring points 1 and survey website 2. The monitoring point 1 is composed of a spread spectrum modulation frequency multiplication forwarding circuit 11 and a wireless synchronous pulse receiving circuit 12; the station 2 is composed of a spread spectrum demodulation displacement resolving circuit 21 and a wireless synchronization pulse transmitting circuit 22. The station 2 generates and sends a radio frequency carrier signal and a wireless synchronization pulse signal to the monitoring point 1; the monitoring point 1 receives the radio frequency carrier signal to carry out frequency multiplication processing, extracts a wireless synchronous pulse signal, generates a monitoring point pseudo code, carries out spread spectrum modulation on the radio frequency carrier signal after frequency multiplication, and transmits the radio frequency carrier signal to the station 2; the station 2 uses the frequency-doubled radio frequency carrier signal as a local oscillation signal to perform orthogonal down-conversion on the echo signal, regenerates the monitoring point pseudo code under the control of the synchronous pulse signal output by the wireless synchronous pulse transmitting circuit 22, performs related de-spreading on the baseband signal, and calculates the displacement of each monitoring point.
FIG. 1 is a schematic view of a measurement system according to the present inventionIt is shown, the utility model provides a micro deformation remote measurement system based on wireless synchronization technique, measurement system comprises the survey website 2 of installing a plurality of monitoring points 1 and distal end on the measured object. The monitoring point 1 is composed of a spread spectrum modulation frequency multiplication forwarding circuit 11 and a wireless synchronous pulse receiving circuit 12; the station 2 is composed of a spread spectrum demodulation displacement resolving circuit 21 and a wireless synchronization pulse transmitting circuit 22. The station 2 generates a radio frequency local oscillator signal with a frequency fR1As a radio frequency carrier signal, and transmits the signal to the monitoring point 1; the station 2 uses the wireless synchronous pulse transmitting circuit 22 to send wireless synchronous pulse signals to the monitoring points; the monitoring point 1 carries out frequency multiplication processing on the received radio frequency carrier signal to obtain a carrier signal after coherent frequency conversion, wherein the frequency of the carrier signal is fR2＝2fR1(ii) a The wireless synchronization pulse receiving circuit 12 extracts the synchronization pulse signal, generates a pseudo code signal for identifying the monitoring point under the control of the synchronization pulse signal, performs spread spectrum modulation on the carrier signal after coherent frequency conversion by using the pseudo code signal, and transmits the carrier signal to the station 2; the measuring station 2 receives the echo signal transmitted by the monitoring point 1 and has the frequency fR1The local radio frequency local oscillator signal is subjected to frequency multiplication to obtain a frequency fR2＝2fR1The radio frequency local oscillation signal is used for carrying out orthogonal down-conversion on the echo signal from the monitoring point 1 received by the station under test 2, and the echo signal is converted into a baseband signal; the station 2 uses the synchronous pulse signal output by the wireless synchronous pulse transmitting circuit to control the second pseudo code generating circuit of the local monitoring point to regenerate the pseudo code of the monitoring point, then performs related despreading on the baseband signal obtained by the orthogonal down converter, and then sends the baseband signal to the displacement calculating circuit 21 to calculate the displacement of the monitoring point.
Fig. 2 is a block diagram of the spread spectrum modulation frequency multiplication forwarding circuit of the present invention, as shown in the figure, the spread spectrum modulation frequency multiplication forwarding circuit 11 is composed of a first dual-band antenna 1101, a first band pass filter 1102, a first low noise amplifier 1103, a first frequency multiplier 1104, a mixer 1105, a second band pass filter 1106, a second power amplifier 1107, and a first pseudo code generating circuit 1108; the first pseudo code generating circuit 1108 is controlled by a first synchronization pulse signal 1109.
Fig. 3 is a block diagram of the spread spectrum demodulation displacement calculating circuit of the present invention, as shown in the figure, the spread spectrum demodulation displacement calculating circuit 21 is composed of a second dual-band antenna 2101, a third power amplifier 2102, a third band-pass filter 2103, a radio frequency local oscillation source 2104, a second frequency multiplier 2105, a fourth band-pass filter 2106, a fourth low noise amplifier 2107, an orthogonal down-converter 2108, a related despreading circuit 2109, a second PN code generating circuit 2110 and a displacement calculating circuit 2111, and the second pseudo code generating circuit 2110 is controlled by a second synchronization pulse signal 2112.
Fig. 4 is a block diagram of a wireless synchronization pulse receiving circuit according to the present invention, as shown in the figure, the wireless synchronization pulse receiving circuit 12 is composed of a receiving antenna 1201, a power divider 1202, a fifth bandpass filter 1203, a fifth low noise amplifier 1204, a first envelope detector 1205, a sixth bandpass filter 1206, a sixth low noise amplifier 1207, a second envelope detector 1208, a comparator 1209, a lead-matched filter 1210, an output-matched filter 1211, a lag-matched filter 1212, a synchronization pulse decision circuit 1213, and a first delay circuit 1214, and the first delay circuit 1214 sends out a first synchronization pulse 1109. The wireless synchronization pulse receiving circuit 12 may also receive remote control instruction data such as turning on or off the monitoring point, setting the transmission power of the monitoring point, and the delay time of the first delay circuit 1214.
Fig. 5 is a structural block diagram of the wireless synchronous pulse transmitting circuit of the present invention, as shown in the figure, the wireless synchronous pulse transmitting circuit 22 is composed of a transmitting antenna 2201, a combiner 2202, a first switch 2203, a first carrier generator 2204, a third pseudo code generating circuit 2205, an inverting circuit 2206, a second switch 2207, a second carrier generator 2208, a synchronous pulse generating circuit 2209, and a second delay circuit 1210; the second delay circuit 1210 outputs a second synchronization pulse signal 2212. The wireless synchronization pulse transmitting circuit 22 may also transmit remote control instruction data such as turning on or off the monitoring point, setting the transmission power of the monitoring point, and the delay time of the first delay circuit 1214.
Suppose the distance between the ith monitoring point 1 and the station 2 is RiI ═ 1,2, …, n; assuming that the maximum distance is RmaxThen, thenThe delay time of the second delay circuit 2208 is set as: tau is2＝(RmaxC), where c is the electromagnetic wave propagation speed, the first delay circuit 1214 delay time should be set to:
if the distance between each monitoring point 1 and the station 2 is short, the delay time of the two delay circuits is approximately 0, and the two delay circuits can be omitted.
Assuming pseudo code rate fpnChip width of Tpn＝(1/fpn) Code length of M, pseudo code period T1＝(M·Tpn) (ii) a Assuming that the clock frequencies of the first, second and third pseudo code generating circuits are fs＝(K·fpn) K is the oversampling multiple and the width of the sync pulse is TPsync＝(TpnK) the repetition period of the synchronization pulse is T2＝(M·Tpn) And a pseudo code period T1The same is true.
Assume that the first carrier signal generated by the first carrier generator 2204 has a frequency fc1The bandwidth is B, and the frequency of the second carrier signal generated by the second carrier generator 2208 is fc2Bandwidth B, the difference between the two carrier frequencies is Δ fc＝|fc1-fc2|，Δfc＞＞B，B＞＞fpn。
Assume that the data signal generated by the third pseudo code generating circuit 2205 is the pseudo code PN0, and the output signal of the comparator 1209 is Y0Then Y is0The pseudo code PN0 generated by the third pseudo code generating circuit 2205 demodulates the data signal sent by the wireless synchronization pulse transmitting circuit; the coefficients of the lead matched filter 1210, the coefficients of the output matched filter 1211, and the tap coefficients of the lag matched filter 1212 are all the inverse sequences of the pseudo code PN0, lead-lag by half a chip width, and Δ T (T ═ Tpn2); assume that the output signal of the lead matched filter 1210 is Y1The output signal of the output matched filter 1211 is Y2, and the output signal of the lag matched filter 1212 is Y3When the following conditions are satisfied: y is2> (M +1)/2, and (Y)1-Y3) The pulse signal is output by a synchronous pulse decision circuit 1213 and is sent to a first delay circuit 1214 to generate a first synchronous pulse signal 1109, and the precise (or high-precision) remote pulse synchronization can be realized between monitoring points and between the monitoring points and a station to be detected by the combined use of the wireless synchronous pulse receiving circuit shown in figure 4 and the wireless synchronous pulse transmitting circuit shown in figure 5, and the working performance of the circuit is reliable.
The displacement amount calculation circuit 2111 performs phase angle calculation on the baseband signal of the i-th monitoring point 1 obtained after the related despreading, and calculates the phase difference phi of the round-trip electromagnetic wave signali＝2π·(2fR1·2Ri) C; then calculating the phase difference phiiChange amount of (delta phi)iTo calculate the displacement amount DeltaRi＝Δφi/(8π)λR1。λR1＝c/fR1Is the wavelength of the radio frequency carrier signal transmitted by the station 2.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. A micro-deformation remote measuring system based on wireless synchronization technology is characterized in that: the system consists of a plurality of monitoring points (1) arranged on a measured object and a remote measuring station (2);
the monitoring point (1) is composed of a spread spectrum modulation frequency multiplication forwarding circuit (11) and a wireless synchronous pulse receiving circuit (12); the station (2) is composed of a spread spectrum demodulation displacement resolving circuit (21) and a wireless synchronous pulse transmitting circuit (22);
the station (2) generates a radio frequency local oscillator signal with a frequency fR1As a radio frequency carrier signal, and transmits the signal to a monitoring point (1); the station (2) sends a wireless synchronization pulse signal to the monitoring point (1) by using a wireless synchronization pulse transmitting circuit (22); the monitoring point (1) will receiveThe obtained radio frequency carrier signal is subjected to frequency multiplication to obtain a carrier signal after coherent frequency conversion, and the frequency of the carrier signal is fR2＝2fR1(ii) a The wireless synchronization pulse receiving circuit (12) extracts a first synchronization pulse signal (1109), under the control of the synchronization pulse signal, a first pseudo code generating circuit (1108) is used for generating a pseudo code signal for identifying a monitoring point, the pseudo code signal is used for carrying out spread spectrum modulation on a carrier signal after coherent frequency conversion, and then the carrier signal is transmitted to a station (2); the measuring station (2) receives the echo signal transmitted by the monitoring point (1) and the frequency is fR1The local radio frequency local oscillator signal is subjected to frequency multiplication to obtain a frequency fR2＝2fR1The radio frequency local oscillation signal is used for carrying out orthogonal down-conversion on the echo signal from the monitoring point (1) received by the station under test (2) and converting the echo signal into a baseband signal; the station (2) outputs a second synchronous pulse signal (2212) by using a wireless synchronous pulse transmitting circuit (22), under the control of the synchronous pulse signal, a monitoring point pseudo code signal is regenerated by using a second pseudo code generating circuit (2110), then the baseband signal obtained by the orthogonal frequency converter is subjected to related de-spreading, and then the baseband signal is sent to a spread spectrum demodulation displacement resolving circuit (21) to calculate the displacement of the monitoring point.
2. The wireless synchronization technology-based micro-deformation telemetry system of claim 1, wherein: the spread spectrum modulation frequency multiplication forwarding circuit (11) is composed of a first double-frequency antenna (1101), a first band-pass filter (1102), a first low noise amplifier (1103), a first frequency multiplier (1104), a mixer (1105), a second band-pass filter (1106), a second power amplifier (1107) and a first pseudo code generating circuit (1108); the first pseudo code generating circuit (1108) is controlled by a first synchronous pulse signal (1109);
wherein: the first dual-frequency antenna (1101) is connected with a first band-pass filter (1102), a first low-noise amplifier (1103) and a first frequency multiplier (1104) in sequence, signals enter the first low-noise amplifier (1103) after being filtered by the first band-pass filter (1102), are sent to the mixer (1105) after passing through the first frequency multiplier (1104), are mixed with pseudo codes generated by a first pseudo code generating circuit (1108) in the mixer (1105), are output to a second band-pass filter (1106), and are amplified by a second power amplifier (1107) and then are sent.
3. The wireless synchronization technology-based micro-deformation telemetry system of claim 1, wherein: the spread spectrum demodulation displacement resolving circuit (21) is composed of a second dual-frequency antenna (2101), a third power amplifier (2102), a third band-pass filter (2103), a radio frequency local vibration source (2104), a second frequency multiplier (2105), a fourth band-pass filter (2106), a fourth low noise amplifier (2107), an orthogonal down-converter (2108), a related despreading circuit (2109), a second pseudo code generating circuit (2110) and a displacement amount calculating circuit (2111), wherein the second pseudo code generating circuit (2110) is controlled by a second synchronous pulse signal (2112);
wherein: the radio frequency local vibration source (2104) is sequentially connected with the third band-pass filter (2103), the third power amplifier (2102) and the second dual-frequency antenna (2101), and a radio frequency carrier signal generated by the radio frequency local vibration source (2104) is filtered and amplified and then radiated out through the second dual-frequency antenna (2101); the second dual-frequency antenna (2101) is connected with a fourth band-pass filter (2106), a fourth low-noise amplifier (2107) and a quadrature down converter (2108) in sequence, and an echo signal received by the second dual-frequency antenna (2101) is sent to the quadrature down converter (2108) after being filtered and amplified; a radio frequency carrier generated by a radio frequency local vibration source (2104) is sent to an orthogonal down converter (2108) after passing through a second frequency multiplier (2105) to obtain a baseband signal and is sent to a related despreading circuit (2109), a second pseudo code generating circuit (2110) locally regenerates a pseudo code signal of a monitoring point and sends the pseudo code signal to the related despreading circuit (2109), and the related despreading circuit (2109) carries out related despreading processing on the baseband signal and inputs the baseband signal to a displacement calculating circuit (2111).
4. The wireless synchronization technology-based micro-deformation telemetry system of claim 1, wherein: the wireless synchronization pulse receiving circuit (12) is composed of a receiving antenna (1201), a power divider (1202), a fifth band-pass filter (1203), a fifth low-noise amplifier (1204), a first envelope detector (1205), a sixth band-pass filter (1206), a sixth low-noise amplifier (1207), a second envelope detector (1208), a comparator (1209), a lead matching filter (1210), an output matching filter (1211), a lag matching filter (1212), a synchronization pulse judging circuit (1213) and a first delay circuit (1214); the fifth low noise amplifier (1204) sends out a first synchronous pulse signal (1109);
wherein: after a signal is received by a receiving antenna (1201), the signal enters a power divider (1202), the signal is divided into two paths, one path of signal passes through a fifth band-pass filter (1203), a fifth low-noise amplifier (1204) and a first envelope detector (1205), the other path of signal passes through a sixth band-pass filter (1206), a sixth low-noise amplifier (1207) and a second envelope detector (1208), the two paths of signal enter a comparator (1209), the signal output from the comparator (1209) passes through a lead matching filter (1210), an output matching filter (1211) and a lag matching filter (1212) and then enters a synchronous pulse judgment circuit (1213), and the output signal of the synchronous pulse judgment circuit (1213) enters a first delay circuit (1214).
5. The wireless synchronization technology-based micro-deformation telemetry system of claim 1, wherein: the wireless synchronization pulse transmitting circuit (22) is composed of a transmitting antenna (2201), a combiner (2202), a first switch (2203), a first carrier wave generator (2204), a third pseudo code generating circuit (2205), an inverting circuit (2206), a second switch (2207), a second carrier wave generator (2208), a synchronization pulse generating circuit (2209) and a second delay circuit (2210); the second delay circuit (2210) outputs a second synchronization pulse signal (2212);
wherein: the first carrier wave generator (2204) is connected with the first switch (2203), and the second carrier wave generator (2208) is connected with the second switch (2207); the synchronous pulse generating circuit (2209) is respectively connected with the second delay circuit (2210) and the third pseudo code generating circuit (2205); the third pseudo code generating circuit (2205) is connected with the first switch (2203) and is connected with the second switch (2207) through the inverting circuit (2206); the first switch (2203) and the second switch (2207) are respectively connected with the combiner (2202), and signals are finally sent out through the transmitting antenna (2201) after passing through the combiner (2202).
6. The wireless synchronization technology-based micro-deformation telemetry system of claim 1, wherein: the pseudo code is an m sequence or a Gold code.
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| CN110515074A (en) * | 2019-09-30 | 2019-11-29 | 符依苓 | A kind of Light deformation telemetry system and method based on wireless synchronization technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110515074A (en) * | 2019-09-30 | 2019-11-29 | 符依苓 | A kind of Light deformation telemetry system and method based on wireless synchronization technology |
| CN110515074B (en) * | 2019-09-30 | 2024-02-20 | 符依苓 | Micro-deformation telemetry system and method based on wireless synchronization technology |
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