CN117233748B - Multi-band radar sensor module based on BLE technology - Google Patents
Multi-band radar sensor module based on BLE technology Download PDFInfo
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- CN117233748B CN117233748B CN202311503905.6A CN202311503905A CN117233748B CN 117233748 B CN117233748 B CN 117233748B CN 202311503905 A CN202311503905 A CN 202311503905A CN 117233748 B CN117233748 B CN 117233748B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
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- 239000003990 capacitor Substances 0.000 claims description 91
- 230000000087 stabilizing effect Effects 0.000 claims description 24
- 239000013078 crystal Substances 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 9
- 230000003993 interaction Effects 0.000 description 9
- 238000001514 detection method Methods 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 4
- 230000006855 networking Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a multi-band radar sensor module based on BLE technology, which comprises: BLE module: the wireless transmission method is used for carrying out wireless transmission of data through a BLE5.1 protocol ad hoc mesh network; the BLE module is provided with a Bluetooth antenna; radar main control module: the method comprises the steps of mixing a received reflected signal with a transmitted signal through Doppler frequency shift effect to obtain corresponding intermediate frequency information, and analyzing the intermediate frequency signal to obtain speed and distance information of an object; the radar main control module is connected to the radar antenna; external extension socket: the method is used for realizing the transmission of PWM signals between the BLE module and the radar main control module; the received reflected signal and the transmitted signal are mixed to obtain corresponding intermediate frequency information, and the intermediate frequency information can be analyzed to reversely push out the information such as the speed, the distance and the like of the object, so that the reliability and the practicability of the sensor are improved. By adopting the double antenna module, the multi-band use is realized.
Description
Technical Field
The invention relates to the technical field of radar sensors, in particular to a multi-band radar sensor module based on BLE technology.
Background
The radar sensor module is a modular device that integrates radar sensor technology. The radar sensor detects and measures information such as a position, a distance, a speed, and a direction of a target object using reflection characteristics of electromagnetic waves. The radar sensor module is generally composed of a radar transmitter, a receiver, a signal processor, an interface circuit and the like. The radar sensor module can provide high-precision measurement results of distance, angle, speed and the like, and can be applied to precision measurement and control requirements. The radar sensor module has wide application in the fields of automation, safety, traffic, military and the like, such as obstacle detection, intelligent driving, unmanned aerial vehicle navigation and the like.
Most of the existing radar sensor modules are in communication with a single wireless protocol and can only be used in a single frequency band; the connection is needed, the networking is possible, the wireless detection effect is not available, and the self-networking is not possible; the existing module has a plurality of protocols or a plurality of frequency bands, and the size is larger.
Disclosure of Invention
The invention aims to provide a multi-band radar sensor module based on BLE technology, which solves the following technical problems:
most existing radar sensor modules communicate in a single wireless protocol and are only capable of use in a single frequency band.
The aim of the invention can be achieved by the following technical scheme:
a multiband radar sensor module based on BLE technology, comprising:
BLE module: the wireless transmission method is used for carrying out wireless transmission of data through a BLE5.1 protocol ad hoc mesh network; the BLE module is provided with a Bluetooth antenna with 2400-2480Mhz frequency band;
radar main control module: the method comprises the steps of mixing a received reflected signal with a transmitted signal through Doppler frequency shift effect to obtain corresponding intermediate frequency information, and analyzing the intermediate frequency signal to obtain speed and distance information of an object; the radar main control module is connected to a radar antenna with a frequency range of 5150MHz-5350 MHz;
external extension socket: the external row of inserts is used for realizing the transmission of PWM signal between BLE module and the radar main control module, external row of inserts includes: female seat and public seat of mutually supporting, female seat is provided with public seat assorted connecting terminal, public seat is provided with two, two public seat is connected to the PWM signal output part of BLE module and the PWM signal output part of radar main control module respectively.
As a further scheme of the invention: the BLE module includes: a Bluetooth chip and a first crystal oscillator;
the Bluetooth chip adopts a TG7120B chip;
the twelfth pin and the thirteenth pin of the bluetooth chip are connected to the first crystal oscillator.
As a further scheme of the invention: the radar main control module comprises: a radar sensor chip and a second crystal oscillator;
the radar sensor chip adopts an AT58MP1T1RS32A chip;
the thirteenth pin and the fourteenth pin of the radar sensor chip are connected to the second crystal oscillator.
As a further scheme of the invention: the external extension socket comprises four pins, a first pin of the external extension socket is connected to a power supply, a second pin of the external extension socket is grounded, and a third pin and a fourth pin of the external extension socket are connected to a female socket of the external extension socket;
the first pin of the Bluetooth chip is connected to the third pin of the external socket in the female socket through the male socket, and the fourth pin of the Bluetooth chip is connected to the fourth pin of the external socket in the female socket through the male socket; the sixth pin of the radar sensor chip is connected to the third pin of the external socket in the female socket through the male socket, the thirty-first pin of the radar sensor chip is connected to the resistor R10, and the resistor R10 is connected to the fourth pin of the external socket in the female socket through the male socket.
As a further scheme of the invention: a seventh pin of the Bluetooth chip is connected to a fifth pin of the radar sensor chip, and an eighth pin of the Bluetooth chip is connected to a fourth pin of the radar sensor chip;
the sixteenth pin of the Bluetooth chip is sequentially connected with a capacitor C41, a capacitor C42 and a capacitor C43 in series, and the capacitor C43 is connected to the Bluetooth antenna.
As a further scheme of the invention: the sixteenth pin of the Bluetooth chip is grounded through a capacitor C44, the capacitor C41 and the capacitor C42 are grounded through a capacitor C45, and the capacitor C42 and the capacitor C43 are grounded through a capacitor C46;
the fifteenth pin of the Bluetooth chip is grounded.
As a further scheme of the invention: the first pin and the thirty-second pin of the radar sensor chip are in short circuit, the sixteenth pin of the radar sensor chip is grounded through a capacitor C23, and the sixteenth pin of the radar sensor chip and the capacitor C23 are connected to the first pin of the radar antenna through a capacitor C22; the twenty-fifth pin of the radar sensor chip is connected to the second pin of the radar antenna through a capacitor C28, and the connection between the twenty-fifth pin of the radar sensor chip and the capacitor C28 is grounded through a capacitor C29 and an inductor L2.
As a further scheme of the invention: the twenty-third pin of the radar sensor chip is connected to the twenty-first pin of the radar sensor chip through a capacitor C26, the twenty-third pin of the radar sensor chip is connected to the twenty-second pin of the radar sensor chip through a capacitor C27 between the twenty-third pin of the radar sensor chip and the capacitor C26, and the twenty-second pin of the radar sensor chip is connected to the twenty-first pin of the radar sensor chip through a capacitor C25 between the twenty-second pin of the radar sensor chip and the capacitor C27.
As a further scheme of the invention: a twenty-seventh pin of the radar sensor chip is grounded through a capacitor C34, a twenty-ninth pin of the radar sensor chip is grounded through a capacitor C32, a thirty-second pin of the radar sensor chip is grounded through a capacitor C31, and a thirty-second pin of the radar sensor chip is grounded through a capacitor C30;
the twenty-eighth pin of the radar sensor chip is connected between the twenty-ninth pin of the radar sensor chip and the capacitor C32 through the capacitor C33;
the fifteenth pin, the seventeenth pin, the twenty-sixth pin, the twenty-fourth pin and the thirty-third pin of the radar sensor chip are grounded, the eighteenth pin of the radar sensor chip is grounded through a capacitor C24, and the nineteenth pin of the radar sensor chip is grounded through a capacitor C38.
As a further scheme of the invention: further comprises:
and a power supply module: the power supply module is used for supplying power to the BLE module and the radar main control module;
the power module includes: a first voltage stabilizing chip U5 and a second voltage stabilizing chip U8;
the input end of the first voltage stabilizing chip U5 is connected to the power supply end, and the output end of the first voltage stabilizing chip U5 is connected to the BLE module; the input end of the second voltage stabilizing chip U8 is connected to the power supply end, and the output end of the second voltage stabilizing chip U8 is connected to the radar main control module;
the output end of the first voltage stabilizing chip U5 is connected to the fourteenth pin of the Bluetooth chip, and the output end of the second voltage stabilizing chip U8 is connected to the first pin of the radar sensor chip.
The invention has the beneficial effects that:
according to the invention, the BLE module is provided with the BLE5.1 protocol, so that an external network is not required to be connected at any time, the mesh network can be self-organized, 65535 sub-devices can be theoretically and maximally contained, data security is realized, the networking capacity is large, the device can be used as a node or a data transfer center, and the data can be connected with a gateway uploading server central control of the self-organizing network and can also be connected with visual devices such as a mobile phone for controlling and monitoring.
According to the invention, the radar main control module is connected with the radar antenna in 5150MHz-5350MHz frequency band, the radar main control module works in 5.8GHzISM frequency band by default, the frequency is flexible and configurable, the characteristics of fixed frequency, high sensitivity and the like are realized, the received reflected signal and the transmitted signal are mixed by utilizing the Doppler frequency shift effect, the corresponding intermediate frequency information can be obtained, the information such as the speed, the distance and the like of an object can be reversely deduced by self-analyzing the intermediate frequency signal, and the reliability and the practicability of the sensor are improved. By adopting the double antenna module, 2400-2480Mhz and 5150MHz-5350MHz multi-band use is realized.
The invention adopts the matched female seat and male seat of the external extension socket. The external socket is adopted as an external pin, so that the assembly is convenient, and the male socket and the female socket form matched with each other are adopted, so that the length of a male socket connecting line is conveniently designed according to the structure of the equipment.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a block diagram of the structure of the present invention;
FIG. 2 is a circuit diagram of a Bluetooth chip of the present invention;
FIG. 3 is a circuit diagram of a first crystal oscillator of the present invention;
FIG. 4 is a circuit connection diagram of a radar sensor chip of the present invention;
fig. 5 is a circuit connection diagram of a second crystal oscillator of the present invention;
FIG. 6 is a pin connection diagram of a radar antenna of the present invention;
FIG. 7 is a pin connection diagram of an external extension socket of the present invention;
FIG. 8 is a circuit diagram of a power module of the present invention;
fig. 9 is a schematic diagram of a BLE module configuration mesh subnet according to the present invention.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-9, the present invention is a multi-band radar sensor module based on BLE technology, comprising:
BLE module: the wireless transmission method is used for carrying out wireless transmission of data through a BLE5.1 protocol ad hoc mesh network; the BLE module is provided with a Bluetooth antenna with 2400-2480Mhz frequency band;
radar main control module: the method comprises the steps of mixing a received reflected signal with a transmitted signal through Doppler frequency shift effect to obtain corresponding intermediate frequency information, and analyzing the intermediate frequency signal to obtain speed and distance information of an object; as shown in fig. 6, the radar main control module is connected to a radar antenna with 5150MHz-5350MHz frequency band;
external extension socket: the external row of inserts is used for realizing the transmission of PWM signal between BLE module and the radar main control module, external row of inserts includes: female seat and public seat of mutually supporting, female seat is provided with public seat assorted connecting terminal, public seat is provided with two, two public seat is connected to the PWM signal output part of BLE module and the PWM signal output part of radar main control module respectively.
Specifically, this module is through female seat and public seat of mutually supporting of external row's of inserting, female seat is provided with public seat assorted connecting terminal, public seat is provided with two, two public seat is connected to the PWM signal output part of BLE module and the PWM signal output part of radar main control module respectively. The external socket is adopted as an external pin, so that the assembly is convenient, and the male socket and the female socket form matched with each other are adopted, so that the length of a male socket connecting line is conveniently designed according to the structure of the equipment.
The BLE module is provided with the BLE5.1 protocol, so that an external network is not required to be connected at any time, the mesh network can be self-organized, 65535 sub-devices can be theoretically and maximally contained, data security is realized, networking capacity is large, the device can be used as a node or a data transfer center, and the data can be connected with a gateway of the self-organizing network to upload the central control of a server and can also be connected with visual devices such as a mobile phone to control and monitor.
In one implementation manner of this embodiment, a BLE module is configured to mesh, and each piece of equipment has a pair of group numbers to configure the equipment with a mesh subnet; one piece of sub-equipment is connected with an upper interface interaction tool through BLE; the interface interaction tool can conduct data interaction with all the sub-devices in the mesh system according to the group number; the maximum theoretical capacity of 32,000 pieces of sub-equipment in a mesh system;
for example, as shown in fig. 9, the module is applied to a light regulation and control system, and the interface interaction tool controls the BLE sub-device through the mesh networking of the BLE module, sends a signal to the BLE sub-device, and the BLE sub-device switches a lamp or adjusts the light brightness through the duty ratio of the PWM signal. The action of one of the sub-devices can be quickly transferred to the next sub-device for action.
The radar main control module is connected with a radar antenna in 5150MHz-5350MHz frequency range, works in 5.8GHzISM frequency range by default, has the characteristics of flexible frequency matching, fixed frequency, high sensitivity and the like, mixes received reflected signals with transmitted signals by using Doppler frequency shift effect, can obtain corresponding intermediate frequency information, can reversely extract information such as speed, distance and the like of an object by self-analyzing the intermediate frequency signal, is also provided with a self-adaptive calibration algorithm, effectively solves the problems of same-frequency interference, out-of-band blocking, environmental interference and the like, improves the reliability and the practicability of a sensor, and can also adapt to different application environments by setting an induction sensitivity threshold value of the radar sensor through instructions. By adopting the double antenna module, 2400-2480Mhz and 5150MHz-5350MHz multi-band use is realized.
In one implementation of the embodiment, the BLE module is matched with the radar main control module, and the BLE is wirelessly connected with the interface interaction tool; the BLE module is connected with the radar main control module through a UART/SPI and other protocol interfaces; the radar detects that the detected object enters the detection area, the detection information of the detected object is transmitted to the BLE module through an ART/SPI and other protocol interfaces, the BLE module transmits data to the interface interaction tool through the mesh network, and the interface interaction tool is used for controlling the data.
For example, the module is applied to a remote monitoring system, a monitoring position detects that a person or a vehicle enters a detection area, a data uploading interface interaction tool is notified to an operator through a BLE5.1 protocol of a BLE module, and the operator can check the person or the vehicle through monitoring or other equipment to remotely switch a door valve. And the data can be uploaded to an interface interaction tool by radar detection of people or vehicles entering and exiting the detection area, and corresponding information is collected.
In one embodiment of the present invention, as shown in fig. 2-3, the BLE module includes: a Bluetooth chip and a first crystal oscillator;
as shown in fig. 2, the bluetooth chip adopts a TG7120B chip;
the twelfth pin and the thirteenth pin of the bluetooth chip are connected to the first crystal oscillator.
In one embodiment of the present invention, as shown in fig. 4 to 5, the radar main control module includes: a radar sensor chip and a second crystal oscillator;
the radar sensor chip adopts an AT58MP1T1RS32A chip;
the thirteenth pin and the fourteenth pin of the radar sensor chip are connected to the second crystal oscillator.
In one embodiment of the present invention, the external extension socket includes four pins, a first pin of the external extension socket is connected to a power supply, a second pin of the external extension socket is grounded, and a third pin and a fourth pin of the external extension socket are connected to a female socket of the external extension socket;
the first pin of the Bluetooth chip is connected to the third pin of the external socket in the female socket through the male socket, and the fourth pin of the Bluetooth chip is connected to the fourth pin of the external socket in the female socket through the male socket; the sixth pin of the radar sensor chip is connected to the third pin of the external socket in the female socket through the male socket, the thirty-first pin of the radar sensor chip is connected to the resistor R10, and the resistor R10 is connected to the fourth pin of the external socket in the female socket through the male socket.
In one embodiment of the present invention, a seventh pin of the bluetooth chip is connected to a fifth pin of the radar sensor chip, and an eighth pin of the bluetooth chip is connected to a fourth pin of the radar sensor chip;
the sixteenth pin of the Bluetooth chip is sequentially connected with a capacitor C41, a capacitor C42 and a capacitor C43 in series, and the capacitor C43 is connected to the Bluetooth antenna.
In one embodiment of the present invention, the sixteenth pin of the bluetooth chip is grounded to the capacitor C41 through the capacitor C44, the capacitor C41 is grounded to the capacitor C42 through the capacitor C45, and the capacitor C42 is grounded to the capacitor C43 through the capacitor C46;
the fifteenth pin of the Bluetooth chip is grounded.
In one embodiment of the invention, the first pin and the thirty-second pin of the radar sensor chip are in short circuit, the sixteenth pin of the radar sensor chip is grounded through a capacitor C23, and the sixteenth pin of the radar sensor chip and the capacitor C23 are connected to the first pin of the radar antenna through a capacitor C22; the twenty-fifth pin of the radar sensor chip is connected to the second pin of the radar antenna through a capacitor C28, and the connection between the twenty-fifth pin of the radar sensor chip and the capacitor C28 is grounded through a capacitor C29 and an inductor L2.
In one embodiment of the present invention, the twenty-third pin of the radar sensor chip is connected to the twentieth pin of the radar sensor chip through a capacitor C26, the twenty-third pin of the radar sensor chip is connected to the twenty-second pin of the radar sensor chip through a capacitor C27 between the twenty-third pin of the radar sensor chip and the capacitor C26, and the twenty-first pin of the radar sensor chip is connected to the twenty-first pin of the radar sensor chip through a capacitor C25 between the twenty-second pin of the radar sensor chip and the capacitor C27.
In one embodiment of the present invention, a twenty-seventh pin of the radar sensor chip is grounded through a capacitor C34, a twenty-ninth pin of the radar sensor chip is grounded through a capacitor C32, a thirty-second pin of the radar sensor chip is grounded through a capacitor C31, and a thirty-second pin of the radar sensor chip is grounded through a capacitor C30;
the twenty-eighth pin of the radar sensor chip is connected between the twenty-ninth pin of the radar sensor chip and the capacitor C32 through the capacitor C33;
the fifteenth pin, the seventeenth pin, the twenty-sixth pin, the twenty-fourth pin and the thirty-third pin of the radar sensor chip are grounded, the eighteenth pin of the radar sensor chip is grounded through a capacitor C24, and the nineteenth pin of the radar sensor chip is grounded through a capacitor C38.
In one embodiment of the present invention, the method further comprises:
and a power supply module: the power supply module is used for supplying power to the BLE module and the radar main control module;
the power module includes: a first voltage stabilizing chip U5 and a second voltage stabilizing chip U8;
the input end of the first voltage stabilizing chip U5 is connected to the power supply end, and the output end of the first voltage stabilizing chip U5 is connected to the BLE module; the input end of the second voltage stabilizing chip U8 is connected to the power supply end, and the output end of the second voltage stabilizing chip U8 is connected to the radar main control module;
the output end of the first voltage stabilizing chip U5 is connected to the fourteenth pin of the Bluetooth chip, and the output end of the second voltage stabilizing chip U8 is connected to the first pin of the radar sensor chip.
In the description of the present invention, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (6)
1. A multiband radar sensor module based on BLE technology, characterized by comprising:
BLE module: the wireless transmission method is used for carrying out wireless transmission of data through a BLE5.1 protocol ad hoc mesh network; the BLE module is provided with a Bluetooth antenna with 2400-2480Mhz frequency band;
radar main control module: the method comprises the steps of mixing a received reflected signal with a transmitted signal through Doppler frequency shift effect to obtain corresponding intermediate frequency information, and analyzing the intermediate frequency signal to obtain speed and distance information of an object; the radar main control module is connected to a radar antenna with a frequency range of 5150MHz-5350 MHz;
external extension socket: the external row of inserts is used for realizing the transmission of PWM signal between BLE module and the radar main control module, external row of inserts includes: the intelligent radar control system comprises a female seat and a male seat which are matched with each other, wherein the female seat is provided with connecting terminals matched with the male seat, two male seats are arranged, and the two male seats are respectively connected to a PWM signal output end of a BLE module and a PWM signal output end of a radar main control module;
the female seat and the male seat are used as external pins, and the length of a male seat connecting line is determined according to the equipment structure of the female seat and the male seat;
the BLE module includes: a Bluetooth chip and a first crystal oscillator;
the Bluetooth chip adopts a TG7120B chip;
the twelfth pin and the thirteenth pin of the Bluetooth chip are connected to the first crystal oscillator;
the radar main control module comprises: a radar sensor chip and a second crystal oscillator;
the radar sensor chip adopts an AT58MP1T1RS32A chip;
a thirteenth pin and a fourteenth pin of the radar sensor chip are connected to a second crystal oscillator;
the external extension socket comprises four pins, a first pin of the external extension socket is connected to a power supply, a second pin of the external extension socket is grounded, and a third pin and a fourth pin of the external extension socket are connected to a female socket of the external extension socket;
the first pin of the Bluetooth chip is connected to the third pin of the external socket in the female socket through the male socket, and the fourth pin of the Bluetooth chip is connected to the fourth pin of the external socket in the female socket through the male socket; the third pin of the radar sensor chip is connected to the fourth pin of the external socket in the female seat through the male seat, the thirty-first pin of the radar sensor chip is connected to the resistor R10, and the resistor R10 is connected to the fourth pin of the external socket in the female seat through the male seat;
a seventh pin of the Bluetooth chip is connected to a fifth pin of the radar sensor chip, and an eighth pin of the Bluetooth chip is connected to a fourth pin of the radar sensor chip;
the sixteenth pin of the Bluetooth chip is sequentially connected with a capacitor C41, a capacitor C42 and a capacitor C43 in series, and the capacitor C43 is connected to the Bluetooth antenna.
2. A multi-band radar sensor module based on BLE technology according to claim 1, wherein,
the sixteenth pin of the Bluetooth chip is grounded through a capacitor C44, the capacitor C41 and the capacitor C42 are grounded through a capacitor C45, and the capacitor C42 and the capacitor C43 are grounded through a capacitor C46;
the fifteenth pin of the Bluetooth chip is grounded.
3. The BLE technology based multiband radar sensor module according to claim 1, wherein the first pin and the thirty-second pin of the radar sensor chip are shorted, the sixteenth pin of the radar sensor chip is grounded through a capacitor C23, and the sixteenth pin of the radar sensor chip and the capacitor C23 are connected to the first pin of the radar antenna through a capacitor C22; the twenty-fifth pin of the radar sensor chip is connected to the second pin of the radar antenna through a capacitor C28, and the connection between the twenty-fifth pin of the radar sensor chip and the capacitor C28 is grounded through a capacitor C29 and an inductor L2.
4. The BLE technology based multiband radar sensor module according to claim 1, wherein a twenty third pin of the radar sensor chip is connected to a twentieth pin of the radar sensor chip via a capacitor C26, a twenty second pin of the radar sensor chip is connected between the twenty third pin of the radar sensor chip and the capacitor C26 via a capacitor C27, and a twenty first pin of the radar sensor chip is connected between the twenty second pin of the radar sensor chip and the capacitor C27 via a capacitor C25.
5. A multi-band radar sensor module based on BLE technology according to claim 1, wherein,
a twenty-seventh pin of the radar sensor chip is grounded through a capacitor C34, a twenty-ninth pin of the radar sensor chip is grounded through a capacitor C32, a thirty-second pin of the radar sensor chip is grounded through a capacitor C31, and a thirty-second pin of the radar sensor chip is grounded through a capacitor C30;
the twenty-eighth pin of the radar sensor chip is connected between the twenty-ninth pin of the radar sensor chip and the capacitor C32 through the capacitor C33;
the fifteenth pin, the seventeenth pin, the twenty-sixth pin, the twenty-fourth pin and the thirty-third pin of the radar sensor chip are grounded, the eighteenth pin of the radar sensor chip is grounded through a capacitor C24, and the nineteenth pin of the radar sensor chip is grounded through a capacitor C38.
6. The BLE technology based multiband radar sensor module according to claim 1, further comprising:
and a power supply module: the power supply module is used for supplying power to the BLE module and the radar main control module;
the power module includes: a first voltage stabilizing chip U5 and a second voltage stabilizing chip U8;
the input end of the first voltage stabilizing chip U5 is connected to the power supply end, and the output end of the first voltage stabilizing chip U5 is connected to the BLE module; the input end of the second voltage stabilizing chip U8 is connected to the power supply end, and the output end of the second voltage stabilizing chip U8 is connected to the radar main control module;
the output end of the first voltage stabilizing chip U5 is connected to the fourteenth pin of the Bluetooth chip, and the output end of the second voltage stabilizing chip U8 is connected to the first pin of the radar sensor chip.
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| CN111049543A (en) * | 2019-08-20 | 2020-04-21 | 王燕 | Wireless receiving circuit and wireless control device |
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