An array radar life detector

Abstract

This utility model relates to the field of emergency rescue technology and provides an array radar life detector, including multiple radar detection units and a display and control terminal. All radar detection units are electrically connected to the display and control terminal. Each radar detection unit includes a transmitting antenna, a transmitter, a receiving antenna, a mixer, a low-noise amplifier, a radar signal processing subunit, a comprehensive processing subunit, an audible and visual alarm subunit, and a WIFI subunit. Specifically, the comprehensive processing subunit is electrically connected to both the audible and visual alarm subunit and the WIFI subunit; the radar signal processing subunit is electrically connected to the comprehensive processing subunit; the low-noise amplifier is electrically connected to the radar signal processing subunit; the mixer is electrically connected to the low-noise amplifier; the transmitter and receiving antenna are both electrically connected to the mixer; and the transmitter is electrically connected to the transmitting antenna. This utility model reduces the false alarm rate and missed alarm rate in complex environments and improves the detection sensitivity of weak life signals.

Description

Technical Field

[0001] This utility model relates to the field of emergency rescue technology, and in particular to an array radar life detector. Background Technology

[0002] In the field of emergency rescue, radar life detectors are widely used and have become core equipment in modern emergency rescue. Their technological advancements have significantly improved rescue efficiency. When a radar life detector is working, the radar radio waves are directional, and the detection area is a fan-shaped region. There are certain blind spots to the left and right of the radar. In actual rescue scenes, the environment is often extremely complex. Because the radar itself has a certain blind spot, its penetration ability decreases sharply when it encounters metal or other materials. This often leads to a decrease in the radar's detection range and performance, preventing it from fully utilizing its capabilities.

[0003] Chinese patent CN214473923U discloses a 24GHz millimeter-wave radar device that achieves basic target detection and distance measurement functions through a front-end antenna transceiver module, a back-end processing circuit, and an LCD display. However, this device has a limited detection coverage angle, low spatial resolution for single-point detection, and weak anti-interference capability. Due to the limited transmitting and receiving antenna arrays of a single radar unit, blind spots exist in the detection area, making it impossible to achieve omnidirectional three-dimensional detection. Utility Model Content

[0004] In view of this, this utility model proposes an array radar life detector to solve the problems of limited detection coverage angle, low spatial resolution of single-point detection, and weak anti-interference capability of existing technologies. Due to the limited transmitting and receiving antenna array of a single radar unit, blind spots exist in the detection area, making it impossible to achieve omnidirectional three-dimensional detection.

[0005] The technical solution of this utility model is implemented as follows: an array radar life detector, comprising multiple radar detection units and a display and control terminal, wherein the multiple radar detection units are all electrically connected to the display and control terminal; each radar detection unit comprises a transmitting antenna, a transmitter, a receiving antenna, a mixer, a low-noise amplifier, a radar signal processing subunit, a comprehensive processing subunit, an audible and visual alarm subunit, and a WIFI subunit, wherein: The integrated processing subunit is electrically connected to the audible and visual alarm subunit and the WIFI subunit, respectively. The radar signal processing subunit is electrically connected to the integrated processing subunit. The low-noise amplifier is electrically connected to the radar signal processing subunit. The mixer is electrically connected to the low-noise amplifier. The transmitter and the receiving antenna are both electrically connected to the mixer. The transmitter is electrically connected to the transmitting antenna.

[0006] Based on the above technical solutions, preferably, the integrated processing subunit includes a main control chip U29A-U29D, several resistors, several capacitors, and a light-emitting diode, with the main control chip U29A-U29D electrically connected to the several resistors, several capacitors, and the light-emitting diode, respectively.

[0007] Based on the above technical solutions, preferably, the radar signal processing subunit includes a gain amplifier chip U16, an operational amplifier U23, a dual-channel operational amplifier U33, resistors R87-R90, resistors R96-R99, resistors R137-R148, resistors R100-R110, capacitors C96-C97, capacitors C103-C104, capacitors C172-C181, capacitors C105-C107, and capacitors C112-C114.

[0008] Based on the above technical solution, preferably, pin 1 of the gain amplifier chip U16 is electrically connected to one end of resistor R87, and the other end of resistor R87 is electrically connected to the 3V3_D terminal; pin 2 of the gain amplifier chip U16 is electrically connected to one end of resistor R88, and the other end of resistor R88 is electrically connected to the 3V3_D terminal; pin 3 of the gain amplifier chip U16 is electrically connected to one end of resistor R89, and the other end of resistor R89 ​​is electrically connected to the 3V3_D terminal; pin 7 of the gain amplifier chip U16 is electrically connected to one end of resistor R90, and the other end of resistor R90 is electrically connected to ground; pin 8 of the gain amplifier chip U16 is electrically connected to one end of capacitor C96, and the other end of capacitor C96 is electrically connected to ground; pin 4 of the gain amplifier chip U16 is electrically connected to ground; and pin 6 of the gain amplifier chip U16 is electrically connected to ground.

[0009] Based on the above technical solution, preferably, pin 1 of the dual-channel operational amplifier U33 is electrically connected to the 3V6_A power supply and to one end of capacitors C172 and C173, while the other ends of capacitors C172 and C173 are electrically connected to ground; pin 4 of the dual-channel operational amplifier U33 is electrically connected to ground; pin 3 of the dual-channel operational amplifier U33 is electrically connected to one end of resistor R137, while the other end of resistor R137 receives the signal from pin 11 of the chip gain amplifier chip U16; pin 2 of the dual-channel operational amplifier U33 is electrically connected to one end of resistor R138, while the other end of resistor R138 is electrically connected to ground.

[0010] Based on the above technical solution, preferably, pin 7 of operational amplifier U23 is electrically connected to the 3V6_A power supply and is connected in parallel with capacitors C105 and C106; the other ends of capacitors C105 and C106 are electrically connected to ground; pin 4 of operational amplifier U23 is electrically connected to ground; pin 3 of operational amplifier U23 is electrically connected to pin 8 of dual-channel operational amplifier U33 through resistor R100; pin 2 of operational amplifier U23 is electrically connected to pin 5 of dual-channel operational amplifier U33 through resistor R101.

[0011] Based on the above technical solutions, preferably, the audible and visual alarm subunit includes a red LED indicator LED2, a green LED indicator LED3, transistors Q12-Q13, and resistors R285-R288.

[0012] Based on the above technical solutions, preferably, the anode of the red LED indicator LED2 is electrically connected to one end of resistor R285, and the other end of resistor R285 is electrically connected to the collector of transistor Q12; the cathode of LED2 is electrically connected to ground; the base of transistor Q12 is electrically connected to one end of resistor R286, and the other end of resistor R286 is electrically connected to the signal Red_LED; the emitter of transistor Q12 is electrically connected to ground; the anode of the green LED indicator LED3 is electrically connected to one end of resistor R287, and the other end of resistor R287 is electrically connected to the collector of transistor Q13; the cathode of LED3 is electrically connected to ground; the base of transistor Q13 is electrically connected to one end of resistor R288, and the other end of resistor R288 is electrically connected to the signal Green_LED; the emitter of transistor Q13 is electrically connected to ground.

[0013] Based on the above technical solutions, preferably, the WIFI sub-unit includes a WIFI chip U41, capacitors C259-C260, resistors R274-R276, and a DIP switch SW2.

[0014] Based on the above technical solution, preferably, pin 1 of WIFI chip U41 is electrically connected to ground; pin 3 of WIFI chip U41 is electrically connected to power supply 3V3_S; capacitors C259 and C260 are electrically connected to ground; pins 34, 37, and 38 of WIFI chip U41 are electrically connected to ground; pin 16 of WIFI chip U41 is electrically connected to signal MCU_RX through resistor R273; resistor R274 is electrically connected to signal MCU_TX; pin 9 of WIFI chip U41 is electrically connected to one end of resistor R275, the other end of resistor R275 is electrically connected to one end of DIP switch SW2, the other end of DIP switch SW2 is electrically connected to ground; and resistor R276 is electrically connected to power supply 3V3_S.

[0015] The array radar life detector provided by this utility model has the following advantages compared with the prior art: By arranging multiple radar detection units in an array, the detection coverage is expanded, eliminating the blind zone problem of a single radar and realizing all-round three-dimensional detection. The multi-channel parallel processing architecture improves signal processing capabilities and anti-interference performance, reduces the false alarm rate and false alarm rate in complex environments, and improves the detection sensitivity of weak life signals. The combined application of the audible and visual alarm subunit and the WIFI subunit enables both local intuitive feedback and remote monitoring, enhancing adaptability in various complex application scenarios. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the system structure of an array radar life detector according to the present invention; Figure 2 This is a wiring diagram of the integrated processing subunit of an array radar life detector according to this utility model; Figure 3 This is a wiring diagram of the radar signal processing subunit of an array radar life detector according to this utility model; Figure 4 This is a wiring diagram of the audible and visual alarm subunit of an array radar life detector according to this utility model; Figure 5 This is a wiring diagram of the WIFI sub-unit of an array radar life detector according to this utility model. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] Please see Figure 1This utility model provides an array radar life detector, which includes multiple radar detection units and a display and control terminal. All radar detection units are electrically connected to the display and control terminal. Each radar detection unit includes a transmitting antenna, a transmitter, a receiving antenna, a mixer, a low-noise amplifier, a radar signal processing subunit, a comprehensive processing subunit, an audible and visual alarm subunit, and a WIFI subunit. The integrated processing subunit is electrically connected to the audible and visual alarm subunit and the WIFI subunit, respectively. The radar signal processing subunit is electrically connected to the integrated processing subunit. The low-noise amplifier is electrically connected to the radar signal processing subunit. The mixer is electrically connected to the low-noise amplifier. The transmitter and the receiving antenna are both electrically connected to the mixer. The transmitter is electrically connected to the transmitting antenna.

[0020] Specifically, this embodiment expands the detection coverage by arranging multiple radar detection units in an array, eliminates the blind zone problem of a single radar, realizes all-round three-dimensional detection, and improves signal processing capability and anti-interference performance through a multi-channel parallel processing architecture, reducing the false alarm rate and false alarm rate in complex environments, and improving the detection sensitivity of weak life signals.

[0021] The integrated processing subunit includes main control chips U29A-U29D, several resistors, several capacitors, and light-emitting diodes. The main control chips U29A-U29D are electrically connected to the several resistors, several capacitors, and light-emitting diodes, respectively.

[0022] The radar signal processing subunit includes a gain amplifier chip U16, an operational amplifier U23, a dual-channel operational amplifier U33, resistors R87-R90, R96-R99, R137-R148, R100-R110, capacitors C96-C97, C103-C104, C172-C181, C105-C107, and C112-C114. The gain amplifier chip U16 is model PGA112AIDGST, the dual-channel operational amplifier U33 is model ADA4896-2, and the operational amplifier U23 is model MCP6D11-E_MS.

[0023] Pin 1 of gain amplifier chip U16 is electrically connected to one end of resistor R87, and the other end of resistor R87 is electrically connected to the 3V3_D terminal; pin 2 of gain amplifier chip U16 is electrically connected to one end of resistor R88, and the other end of resistor R88 is electrically connected to the 3V3_D terminal; pin 3 of gain amplifier chip U16 is electrically connected to one end of resistor R89, and the other end of resistor R89 ​​is electrically connected to the 3V3_D terminal; pin 7 of gain amplifier chip U16 is electrically connected to one end of resistor R90, and the other end of resistor R90 is electrically connected to ground; pin 8 of gain amplifier chip U16 is electrically connected to one end of capacitor C96, and the other end of capacitor C96 is electrically connected to ground; pin 4 of gain amplifier chip U16 is electrically connected to ground; pin 6 of gain amplifier chip U16 is electrically connected to ground.

[0024] Pin 1 of the dual-channel operational amplifier U33 is electrically connected to the 3V 6_A power supply and to one end of capacitors C172 and C173. The other ends of capacitors C172 and C173 are electrically connected to ground. Pin 4 of the dual-channel operational amplifier U33 is electrically connected to ground. Pin 3 of the dual-channel operational amplifier U33 is electrically connected to one end of resistor R137. The other end of resistor R137 receives the signal from pin 11 of the gain amplifier chip U16. Pin 2 of the dual-channel operational amplifier U33 is electrically connected to one end of resistor R138. The other end of resistor R138 is electrically connected to ground.

[0025] Pin 7 of operational amplifier U23 is electrically connected to the 3V 6_A power supply and is connected in parallel with capacitors C105 and C106. The other ends of capacitors C105 and C106 are electrically connected to ground. Pin 4 of operational amplifier U23 is electrically connected to ground. Pin 3 of operational amplifier U23 is electrically connected to pin 8 of dual-channel operational amplifier U33 through resistor R100. Pin 2 of operational amplifier U23 is electrically connected to pin 5 of dual-channel operational amplifier U33 through resistor R101.

[0026] Specifically, this embodiment uses a programmable gain amplifier to achieve flexible adjustment of signal gain, thereby improving the adaptability to vital sign signals of different intensities. An optimized signal matching and filtering circuit is formed through a resistor-capacitor network, which suppresses spurious noise and interference. The cascaded structure of the dual-channel operational amplifier and differential amplifier improves the dynamic range and signal-to-noise ratio of the overall system, and realizes low-distortion signal processing under high-gain conditions. The reasonable configuration of power supply decoupling and filtering circuit effectively isolates the mutual interference between amplifiers at each stage, ensuring the stability and consistency of the signal link.

[0027] The audible and visual alarm subunit includes a red LED indicator LED2, a green LED indicator LED3, transistors Q12-Q13, and resistors R285-R288.

[0028] The anode of the red LED indicator LED2 is electrically connected to one end of resistor R285, and the other end of resistor R285 is electrically connected to the collector of transistor Q12; the cathode of LED2 is electrically connected to ground; the base of transistor Q12 is electrically connected to one end of resistor R286, and the other end of resistor R286 is electrically connected to the signal Red_LED; the emitter of transistor Q12 is electrically connected to ground. The anode of the green LED indicator LED3 is electrically connected to one end of resistor R287, and the other end of resistor R287 is electrically connected to the collector of transistor Q13; the cathode of LED3 is electrically connected to ground; the base of transistor Q13 is electrically connected to one end of resistor R288, and the other end of resistor R288 is electrically connected to the signal Green_LED; the emitter of transistor Q13 is electrically connected to ground.

[0029] Specifically, this embodiment constructs a dual-state indication system by combining red LED2 and green LED3, which can intuitively distinguish different states of detection results (such as detected / not detected, normal / abnormal, etc.). By employing transistors Q12 and Q13 as switching drivers, low-power, high-reliability LED control is achieved, extending the device's battery life. The resistor network R285-R288 not only protects the LEDs and transistors, ensuring they operate within a safe current range, but also optimizes current distribution, improving circuit stability. Independent Red_LED and Green_LED control signal lines enhance flexibility, enabling rich status indication logic for different detection scenarios. This intuitive and efficient audio-visual indication solution improves user-friendliness, allowing operators to quickly and accurately obtain detection results, making it particularly suitable for high-pressure working environments such as emergency rescue.

[0030] The WIFI subunit includes a WIFI chip U41, capacitors C259-C260, resistors R274-R276, and a DIP switch SW2. The model of the WIFI chip U41 is ESP32-WROOM-32UE.

[0031] Pin 1 of WIFI chip U41 is electrically connected to ground; pin 3 of WIFI chip U41 is electrically connected to power supply 3V3_S; capacitors C259 and C260 are electrically connected to ground; pins 34, 37, and 38 of WIFI chip U41 are electrically connected to ground; pin 16 of WIFI chip U41 is electrically connected to signal MCU_RX through resistor R273; resistor R274 is electrically connected to signal MCU_TX; pin 9 of WIFI chip U41 is electrically connected to one end of resistor R275; the other end of resistor R275 is electrically connected to one end of DIP switch SW2; the other end of DIP switch SW2 is electrically connected to ground; resistor R276 is electrically connected to power supply 3V3_S.

[0032] Specifically, this embodiment integrates a high-performance WIFI chip to achieve real-time wireless transmission of detection results, enabling operators to obtain monitoring data from a safe location away from dangerous areas; The efficient connection between the serial port (MCU_RX / TX) and the integrated processing subunit enables seamless communication between the system's internal and external systems. The configuration of the DIP switch SW2 and resistor R275 provides flexible operating mode switching, facilitating transitions between configuration and operating modes. The resistor network configuration R273-R276 optimizes power consumption while ensuring signal integrity. This wireless communication scheme enhances the system's remote control and data sharing capabilities, enabling multiple radar detection units to work collaboratively and centrally present detection results, significantly improving application flexibility and rescue efficiency in complex environments.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An array radar life detector, characterized by, The array radar life detector includes multiple radar detection units and a display and control terminal, with each radar detection unit electrically connected to the display and control terminal. Each radar detection unit includes a transmitting antenna, a transmitter, a receiving antenna, a mixer, a low-noise amplifier, a radar signal processing subunit, a comprehensive processing subunit, an audible and visual alarm subunit, and a WIFI subunit, wherein: The integrated processing subunit is electrically connected to the audible and visual alarm subunit and the WIFI subunit, respectively. The radar signal processing subunit is electrically connected to the integrated processing subunit. The low-noise amplifier is electrically connected to the radar signal processing subunit. The mixer is electrically connected to the low-noise amplifier. The transmitter and the receiving antenna are both electrically connected to the mixer. The transmitter is electrically connected to the transmitting antenna.

2. The array radar life detector according to claim 1, wherein The integrated processing subunit includes main control chips U29A-U29D, several resistors, several capacitors, and light-emitting diodes. The main control chips U29A-U29D are electrically connected to the several resistors, several capacitors, and light-emitting diodes, respectively.

3. The array radar life detector according to claim 1, wherein The radar signal processing subunit includes a gain amplifier chip U16, an operational amplifier U23, a dual-channel operational amplifier U33, resistors R87-R90, R96-R99, R137-R148, R100-R110, capacitors C96-C97, C103-C104, C172-C181, C105-C107, and C112-C114. The gain amplifier chip U16 is model PGA112AIDGST, the dual-channel operational amplifier U33 is model ADA4896-2, and the operational amplifier U23 is model MCP6D11-E_MS.

4. An array radar life detector as claimed in claim 3, characterized in that Pin 1 of gain amplifier chip U16 is electrically connected to one end of resistor R87, and the other end of resistor R87 is electrically connected to the 3V3_D terminal; pin 2 of gain amplifier chip U16 is electrically connected to one end of resistor R88, and the other end of resistor R88 is electrically connected to the 3V3_D terminal; pin 3 of gain amplifier chip U16 is electrically connected to one end of resistor R89, and the other end of resistor R89 ​​is electrically connected to the 3V3_D terminal; pin 7 of gain amplifier chip U16 is electrically connected to one end of resistor R90, and the other end of resistor R90 is electrically connected to ground; pin 8 of gain amplifier chip U16 is electrically connected to one end of capacitor C96, and the other end of capacitor C96 is electrically connected to ground; pin 4 of gain amplifier chip U16 is electrically connected to ground; pin 6 of gain amplifier chip U16 is electrically connected to ground.

5. The array radar life detector of claim 3, wherein, Pin 1 of the dual-channel operational amplifier U33 is electrically connected to the 3V 6_A power supply and to one end of capacitors C172 and C173. The other ends of capacitors C172 and C173 are electrically connected to ground. Pin 4 of the dual-channel operational amplifier U33 is electrically connected to ground. Pin 3 of the dual-channel operational amplifier U33 is electrically connected to one end of resistor R137. The other end of resistor R137 receives the signal from pin 11 of the gain amplifier chip U16. Pin 2 of the dual-channel operational amplifier U33 is electrically connected to one end of resistor R138. The other end of resistor R138 is electrically connected to ground.

6. An array radar life detector as in claim 3, wherein, Pin 7 of operational amplifier U23 is electrically connected to the 3V 6_A power supply and is connected in parallel with capacitors C105 and C106. The other ends of capacitors C105 and C106 are electrically connected to ground. Pin 4 of operational amplifier U23 is electrically connected to ground. Pin 3 of operational amplifier U23 is electrically connected to pin 8 of dual-channel operational amplifier U33 through resistor R100. Pin 2 of operational amplifier U23 is electrically connected to pin 5 of dual-channel operational amplifier U33 through resistor R101.

7. The array radar life detector according to claim 1, wherein, The audible and visual alarm subunit includes a red LED indicator LED2, a green LED indicator LED3, transistors Q12-Q13, and resistors R285-R288.

8. An array radar life detector as in claim 7, wherein, The anode of the red LED indicator LED2 is electrically connected to one end of resistor R285, and the other end of resistor R285 is electrically connected to the collector of transistor Q12; the cathode of LED2 is electrically connected to ground; the base of transistor Q12 is electrically connected to one end of resistor R286, and the other end of resistor R286 is electrically connected to the signal Red_LED; the emitter of transistor Q12 is electrically connected to ground. The anode of the green LED indicator LED3 is electrically connected to one end of resistor R287, and the other end of resistor R287 is electrically connected to the collector of transistor Q13; the cathode of LED3 is electrically connected to ground; the base of transistor Q13 is electrically connected to one end of resistor R288, and the other end of resistor R288 is electrically connected to the signal Green_LED; the emitter of transistor Q13 is electrically connected to ground.

9. The array radar life detector according to claim 1, wherein, The WIFI subunit includes a WIFI chip U41, capacitors C259-C260, resistors R274-R276, and a DIP switch SW2. The model of the WIFI chip U41 is ESP32-WROOM-32UE.

10. The array radar life detector of claim 9, wherein, The pin 1 of the WIFI chip U41 is electrically connected with the ground; the pin 3 of the WIFI chip U41 is electrically connected with the power supply 3V3_S, the capacitor C259 and the capacitor C260 are electrically connected with the ground; the pin 34, the pin 37 and the pin 38 of the WIFI chip U41 are electrically connected with the ground, the pin 16 of the WIFI chip U41 is electrically connected with the signal MCU_RX through the resistor R273; the resistor R274 is electrically connected with the signal MCU_TX; the pin 9 of the WIFI chip U41 is electrically connected with one end of the resistor R275, the other end of the resistor R275 is electrically connected with one end of the dial switch SW2, the other end of the dial switch SW2 is electrically connected with the ground; the resistor R276 is electrically connected with the power supply 3V3_S.

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