CN210354662U - Non-contact vital sign real-time monitoring system and radar front-end system thereof - Google Patents
Non-contact vital sign real-time monitoring system and radar front-end system thereof Download PDFInfo
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- CN210354662U CN210354662U CN201920823502.2U CN201920823502U CN210354662U CN 210354662 U CN210354662 U CN 210354662U CN 201920823502 U CN201920823502 U CN 201920823502U CN 210354662 U CN210354662 U CN 210354662U
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Abstract
The utility model discloses a non-contact vital sign radar front-end system and non-contact vital sign real-time supervision system, including transmitting antenna, pulse generator, frame delay module, sample thief, quantizer and receiving antenna, pulse generator is used for forming the pulse transmitting signal, and its input links to each other with the input of frame delay module, and its output links to each other with transmitting antenna; the output end of the frame delay module is connected with the control end of the sampler and is used for realizing sequential delay pulse sampling of the sampler; the input end of the sampler is connected with the output end of the quantizer, and the input end of the quantizer is connected with the receiving antenna. The utility model discloses replace converter and power amplifier in traditional radar at emission part with pulse generator, and also do not have inverter circuit and intermediate frequency processing circuit at receiving part, but utilize the echo signal of the different time sequence delay sample transmission of frame time delay module control sample thief, can survey radar echo signal more accurately.
Description
Technical Field
The utility model relates to a vital sign surveys technical field, especially relates to a non-contact vital sign radar front-end system to and non-contact vital sign real-time monitoring system including it.
Background
The vital sign detection technology mainly observes the cardiopulmonary activity parameters of a human, and the detected cardiopulmonary information is used for judging a life body and emergently processing a medical emergency. The method for realizing the vital sign detection is a contact sensor, the sensor finishes the collection and the processing of heart and lung signals by being attached to the surface of a human body, and has high precision measurement, large volume and high cost.
As a new physiological signal detection mode, the microwave biological radar can detect vital sign signals of heart and lung activities and the like of a human body. Compared with the traditional electrocardio, pulse and the like, the microwave biological radar detection device is not only non-contact, but also has good penetrability, can penetrate through obstacles such as clothes, bedding and the like for detection, and has application potential in the fields of medical diagnosis, health monitoring, disaster rescue and the like due to the advantages. The radar front end is mainly used for generating pulse signals and receiving signals, and sampled digital signals are transmitted to a signal processing terminal in a data frame mode. One of the challenges facing contactless life detection technology today is the design of the radar front-end system.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a non-contact vital sign radar front-end system reaches non-contact vital sign real-time monitoring system including it utilizes radar front-end system's the different time sequence time delay of sample thief transmission echo signal, can detect radar echo signal more accurately.
On the one hand, the utility model provides a non-contact vital sign radar front-end system, including transmitting antenna, pulse generator, frame delay module, sample thief, quantizer and receiving antenna, wherein:
the pulse generator is used for forming a pulse transmitting signal, the input end of the pulse generator is connected with the input end of the frame delay module, and the output end of the pulse generator is connected with the transmitting antenna;
the output end of the frame delay module is connected with the control end of the sampler and is used for realizing sequential delay pulse sampling of the sampler;
the input end of the sampler is connected with the output end of the quantizer, and the input end of the quantizer is connected with the receiving antenna.
Furthermore, the number of the samplers is multiple, and the samplers are arranged in parallel.
Furthermore, each sampler is provided with a different number of delay units τ on the circuit.
Furthermore, the number of the delay units τ on the circuit where each sampler is located is expanded according to an arithmetic formula of an arithmetic sequence:
a(n)＝a(1)+(n-1)×d (1)
wherein n represents the serial number of the sampler, and n is 1, 2, 3; a (1) represents the number of delay units tau on the circuit where the 1 st sampler is located, and a (1) is 0; d represents the tolerance of the arithmetic progression, and d is 1.
Furthermore, the pulse generator internally comprises a pulse generating circuit and a pulse shaping circuit connected with the pulse generating circuit in series, and radar transmitting signals sequentially pass through the pulse generating circuit and the pulse shaping circuit to form pulse transmitting signals.
Furthermore, the non-contact vital sign radar front-end system further comprises a signal conditioning module arranged between the receiving antenna and the quantizer, wherein the input end of the signal conditioning module is connected with the receiving antenna, and the output end of the signal conditioning module is connected with the input end of the quantizer and used for filtering and amplifying the received echo signals.
Further, the transmit and receive antennas are Vivaldi antennas.
In conclusion, compared with the prior art, the non-contact vital sign radar front-end system of the utility model forms a pulse transmitting signal through the pulse generator and radiates out through the transmitting antenna; the electromagnetic wave penetrates through the barrier and is reflected back to be received by the receiving antenna after encountering the human body target; the frame delay module controls the sampler to delay the echo signals transmitted by the sampling in different time sequences so as to determine the radial distance between the target and the radar, and further more accurately detect the radar echo signals and restore reliable life information.
On the other hand, the utility model provides another kind of non-contact vital sign real-time monitoring system, including radar front-end system, data signal processing module, terminal display module and power module, data signal processing module links to each other with radar front-end system, terminal display module and power module respectively, radar front-end system is arbitrary item on it non-contact vital sign radar front-end system.
Further, the radar front-end system and the data signal processing module are connected through an SPI communication protocol.
Further, the terminal display module is a graphical user interface.
The utility model provides a non-contact vital sign real-time monitoring system obviously has the advantage that radar echo signal is surveyed more accurately to aforementioned non-contact vital sign radar front-end system, and no longer the repeated description is here.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural diagram of a contactless vital sign radar front-end system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a non-contact real-time vital sign monitoring system according to an embodiment of the present invention.
Drawings
1-transmitting antenna 2-pulse generator 3-frame delay module
4-sampler 5-signal conditioning module 6-quantizer
7-receiving antenna 8-time delay unit tau 9-data signal module
10-power supply module 11-terminal display module
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a schematic structural diagram of a contactless vital sign radar front-end system according to an embodiment of the present invention.
As shown in fig. 1, a non-contact vital sign radar front-end system includes a transmitting antenna 1, a pulse generator 2, a frame delay module 3, a sampler 4, a quantizer 6, and a receiving antenna 7, where the pulse generator 2 is configured to form a pulse transmitting signal, an input end of the pulse generator is connected to an input end of the frame delay module 3, and an output end of the pulse generator is connected to the transmitting antenna 1; the output end of the frame delay module 3 is connected with the control end of the sampler 4 and is used for realizing sequential delay pulse sampling of the sampler 4; the input of the sampler 4 is connected to the output of a quantizer 6, the input of said quantizer 6 being connected to a receiving antenna 7. Compared with the prior art, the utility model discloses a non-contact vital sign radar front-end system at first, has replaced converter and power amplifier in traditional radar with impulse generator 2 at the transmission part, and secondly, does not have inverter circuit and intermediate frequency processing circuit yet at the receiving part, but utilizes the echo signal of 4 different time sequence delay sample emission of frame delay module 3 control sample thief, can survey radar echo signal more accurately. The transmitting antenna 1 and the receiving antenna 7 are preferably Vivaldi antennas.
In a further technical scheme, the utility model discloses non-contact vital sign radar front-end system is still including setting up signal conditioning module 5 between receiving antenna 7 and quantizer 6, and this signal conditioning module 5 is used for filtering and enlargies the weak radar echo signal that receiving antenna 7 received, is convenient for do the quantization by quantizer 6 at the back, detects and separates target signal better, and its input links to each other with receiving antenna 7, and its output links to each other with quantizer 6's input.
Specifically, as shown in fig. 1, the number of the samplers 4 is plural, and the plural samplers 4 are arranged in parallel. Meanwhile, a circuit where each sampler 4 is located is provided with delay units τ 8 with different numbers, and the number of the delay units τ 8 on the circuit where each sampler 4 is located is expanded according to an arithmetic formula:
a(n)＝a(1)+(n-1)×d (1)
where n denotes the serial number of the sampler 4, where n is 1, 2, 3, a (1) denotes the number of delay units τ 8 on the circuit where the 1 st sampler 4 is located, and a (1) is 0; d represents the tolerance of the arithmetic progression, and d is 1.
The value of the delay unit τ may be arbitrarily set according to actual requirements.
Preferably, the pulse generator 2 includes a pulse generating circuit and a pulse shaping circuit connected in series with the pulse generating circuit, and the radar transmission signal sequentially passes through the pulse generating circuit and the pulse shaping circuit to form a pulse transmission signal.
On the other hand, the utility model provides still another kind of non-contact vital sign real-time monitoring system, specifically as shown in FIG. 2, including radar front end system, data signal processing module 9, terminal display module 11 and power module 10, data signal processing module 9 links to each other with radar front end system, terminal display module 11 and power module 10 respectively, radar front end system is arbitrary item on it non-contact vital sign radar front end system.
The monitoring system sends electromagnetic waves through a transmitting antenna 1 of a radar front-end system, the electromagnetic waves are reflected by the chest of a human body and then received by a receiving antenna 7 of the radar front-end system to obtain vital sign echo signals, the signals are filtered and amplified with low noise through a signal conditioning module 5, then the echo signals are collected through a sampler 4 and sent to a digital signal processing module to be processed and extracted to obtain the corresponding breathing and heartbeat frequencies of the human body, and the data are displayed through a terminal display module 11. Preferably, the terminal display module 11 is a Graphical User Interface (GUI).
Furthermore, it should be mentioned that the radar front-end system and the data signal processing module 9 are preferably connected via an SPI communication protocol.
The utility model discloses non-contact vital sign real-time monitoring system obviously has non-contact vital sign radar front-end system and can survey radar echo signal's beneficial technological effect more accurately, and here is no longer repeated.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A non-contact vital sign radar front-end system is characterized by comprising a transmitting antenna, a pulse generator, a frame delay module, a sampler, a quantizer and a receiving antenna, wherein:
the pulse generator is used for forming a pulse transmitting signal, the input end of the pulse generator is connected with the input end of the frame delay module, and the output end of the pulse generator is connected with the transmitting antenna;
the output end of the frame delay module is connected with the control end of the sampler and is used for realizing sequential delay pulse sampling of the sampler;
the input end of the sampler is connected with the output end of the quantizer, and the input end of the quantizer is connected with the receiving antenna.
2. The contactless vital signs radar front-end system of claim 1, wherein the number of samplers is multiple, and wherein multiple samplers are arranged in parallel.
3. The contactless vital signs radar front-end system according to claim 2, wherein each sampler is provided with a different number of delay units τ on the circuit.
4. The non-contact vital sign radar front-end system according to claim 3, wherein the number of the delay units τ on the circuit where each sampler is located is expanded according to an arithmetic equation:
a(n)＝a(1)+(n-1)×d (1)
wherein n denotes the serial number of the sampler, n is 1, 2, 3, a (1) denotes the number of delay units τ on the circuit where the 1 st sampler is located, and a (1) is 0; d represents the tolerance of the arithmetic progression, and d is 1.
5. The non-contact vital signs radar front-end system according to any one of claims 1 to 4, wherein the pulse generator internally comprises a pulse generating circuit and a pulse shaping circuit connected in series with the pulse generating circuit, and the radar transmission signal forms a pulse transmission signal sequentially through the pulse generating circuit and the pulse shaping circuit.
6. The non-contact vital sign radar front-end system according to claim 1, further comprising a signal conditioning module disposed between the receiving antenna and the quantizer, wherein an input of the signal conditioning module is connected to the receiving antenna, and an output of the signal conditioning module is connected to an input of the quantizer, for filtering and amplifying the received echo signal.
7. The contactless vital signs radar front-end system of claim 1, wherein the transmit and receive antennas are Vivaldi antennas.
8. A non-contact vital sign real-time monitoring system is characterized by comprising a radar front-end system, a data signal processing module, a terminal display module and a power supply module, wherein the data signal processing module is respectively connected with the radar front-end system, the terminal display module and the power supply module, and the radar front-end system is the non-contact vital sign radar front-end system according to any one of claims 1 to 7.
9. The real-time contactless vital sign monitoring system according to claim 8, wherein the radar front-end system and the data signal processing module are connected via an SPI communication protocol.
10. The real-time contactless vital sign monitoring system according to claim 8, wherein the terminal display module is a graphical user interface.
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| CN201920823502.2U CN210354662U (en) | 2019-05-31 | 2019-05-31 | Non-contact vital sign real-time monitoring system and radar front-end system thereof |
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| CN201920823502.2U CN210354662U (en) | 2019-05-31 | 2019-05-31 | Non-contact vital sign real-time monitoring system and radar front-end system thereof |
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Effective date of registration: 20200522 Address after: No.39 Jianshan Road, high tech Development Zone, Yuelu District, Changsha City, Hunan Province Patentee after: CHANGSHA JUNMIN ADVANCED TECHNOLOGY RESEARCH Co.,Ltd. Address before: 410205 Room G0224, Headquarters Building, Changsha Zhongdian Software Park Co., Ltd., 39 Jianshan Road, Changsha High-tech Development Zone, Hunan Province Co-patentee before: CHANGSHA JUNMIN ADVANCED TECHNOLOGY RESEARCH Co.,Ltd. Patentee before: HUNAN SHUNHONG INTELLIGENT TECHNOLOGY Co.,Ltd. |
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