JP6522702B2 - Master-slave compatible parking sensor support system - Google Patents

Description

  The present invention relates to the field of parking assistance systems, and more particularly to a master-slave compatible parking sensor assistance system.

  As shown in FIG. 1, a conventional parking sensor generally comprises a control box 71, a plurality of sensors 72, at least one reminder 73, each of the plurality of sensors 72 being connected to the control box 71, and the control box 71. Coordinate the operation with each other under control by. Each sensor 72 detects the data of the obstacle and transmits it to the control box 71. When the control box 71 analyzes the above data, it determines the distance, direction and position of the obstacle. If the distance to the obstacle satisfies a predetermined condition, the control box 71 instructs the reminder 73 to issue an alarm. A plurality of sensors 72 need to be installed on the outside of the vehicle depending on the operation requirements, for example, installed on the front and rear bumpers, and the control box 71 needs to be installed in the vehicle. Generally, it is necessary to install about four sensors 72 at regular intervals, so signal transmission and feeding between sensor 72 and control box 71 becomes very complicated, and circuit and control box 71 Not only does it lead to cost increases, but too long data cables are susceptible to interference.

A hostless parking sensor system has been developed for the above problems. For details, reference is made to a parking sensor device without a control box as disclosed in Chinese invention patent CN1892249A. As shown in FIG. 2, at least one master sensor and one or more slave sensors 82 are provided, and the master sensor 81 has an obstacle detection function, and adjusts the operation timing of each slave sensor 82. Since both the detection of an obstacle and the adjustment of the operation timing of the slave sensor 82 are performed by the master sensor 81 , the control box 71 can be replaced and the influence of the control box 71 can be removed. In addition, since the master sensor 81 and the slave sensor 82 are all installed in the bumper, it is possible not only to shorten the length of the data cable of the entire parking sensor but also to improve the efficiency of the vehicle test by testing with the bumper. It can contribute.

  As shown in FIG. 3, the applicant has developed a Chinese invention patent CN102129076A for the above-mentioned patent deficiencies. The hostless parking sensor system of the tandem structure according to the invention includes a plurality of sensors 91, and the first terminals of the respective sensors 91 are respectively connected to the second terminals of the adjacent sensors 91 through the internal network 92 to have a tandem structure Thus, information transmission between the sensors 91 is realized. Thus, high system response efficiency, high manufacturing and installation efficiency, and high sensor accuracy can be realized.

  However, for the above two patents, the master sensor 81 and the slave sensor 82 in Chinese patent CN1892249A and then the sensor 91 in Chinese patent CN102129076A all comprise a microprocessor, ie, those sensors are so-called CPU digital probes, cost Is high.

  As shown in FIG. 4, the applicant has developed a Chinese patent CN103592649A for the above-mentioned patent deficiencies. The integrated parking sensor system according to the above invention comprises a master sensor and at least one slave sensor, and the master sensor 1 comprises a CPU module 11, a first ultrasonic sensor 12, a master drive module 13, a master amplifier module 14, at least one. , The CPU module 11 incorporates an A / D conversion module, the CPU module 11 drives the first ultrasonic sensor 12 through the master drive module 13, and the first ultrasonic sensor 12 is the master amplifier module 14 amplifies the analog signal reflected through the reference numeral 14 and transmits it to the A / D conversion module of the CPU module 11. The slave sensor 2 is an analog probe without a CPU, the CPU module 11 drives one slave sensor 2 through one slave drive module 15, and each slave sensor 2 reflects the reflected analog signal by the A / A of the CPU module 11. Transmit to D conversion module. The slave sensor 2 comprises a boost drive module 21, a second ultrasonic sensor 22 and a slave amplifier module 23, the boost drive module 21 being between the slave drive module 15 and the second ultrasonic sensor 22 for redrive, The slave amplifier module 23 amplifies the reflected analog signal and transmits it to the A / D conversion module of the CPU module 11. The signal line and the power line between the master sensor and the slave sensor are integrated, that is, current flows in the signal line and a signal is transmitted to the power line. In this integrated parking sensor system, while the master sensor is a controller of the entire system, it also plays the role of a probe, and at least one slave sensor only plays the role of a probe and is connected to the master sensor in communication. By this, the entire parking system can realize various functions as in the conventional hosted and unhosted parking system.

  However, the above invention still has room for improvement. For example, it is possible to further improve the performance such as its capacity, monitoring distance (about 1.5 cm), energy, signal amplitude, and interference tolerance. Based on this point, the present invention provides a master-slave compatible parking sensor support system capable of further improving performance.

To achieve the above object, a master-slave compatible parking sensor assistance system according to the present invention comprises a master sensor and at least one slave sensor, wherein the master sensor is a CPU module, a first ultrasonic sensor, A master drive module, a master amplifier module, a slave drive module, and a power supply module for power supply, wherein the number of slave drive modules and the number of slave sensors are the same, and the slave drive modules and slave sensors are in one-to-one correspondence The slave sensor is a digital probe without a CPU, and the slave sensor includes an ASIC , a boost drive module, and a second ultrasonic sensor, and the CPU module is a master drive module. Driving the first ultrasonic sensor through the first amplifier, the first ultrasonic sensor amplifying the reflection signal through the master amplifier module, and transmitting it to the A / D conversion module of the CPU module, the CPU module being a slave through the slave drive module The ASIC of the sensor is driven, and the ASIC drives a second ultrasonic sensor through the boost drive module, and the second ultrasonic sensor feeds back a reflected signal to the A / D conversion module of the CPU module through the ASIC .

Furthermore, the power supply module includes a first power supply module and a second power supply module, the first power supply module is used to supply power to the CPU module and the second power supply module , and the second power supply module is connected to each slave sensor in parallel. Used for feeding.

Furthermore, there are three pins in the housing of the slave sensor, a signal pin pulled out from the ASIC , a negative pin , and a positive pin , and 3N or more pins in the housing of the master sensor and a signal pin pulled out from the slave drive module. , negative electrode pins drawn from the second power source comprises a cathode pin, the anode pin and the cathode pin of the second power supply module is connected to the negative pin and the cathode pin of the slave sensor, respectively, the signal pins of the slave drive module ASIC Connected to the pin of

Furthermore, the CPU module, to set the configuration parameters of each ASIC, can transmit a communication command to the ASIC.

Further, the CPU module of the master sensor is provided with an input port for receiving the signal of the reverse gear R, the speed signal SPD and the switching signal SWT .

Furthermore, the CPU module of the master sensor is provided with an output port for outputting a buzzer signal BUZZER , a light emitting diode control signal LED and a data communication signal DATA .

  Furthermore, the number of slave sensors is 1-11.

As a good effect of the present invention, the master-slave compatible parking sensor assistance system according to the present invention uses an ASIC for each slave sensor, so the whole system has a wider detection range and more resistance to interference. Have.

  BRIEF DESCRIPTION OF THE DRAWINGS To describe the embodiments of the present invention or the technical solutions of the prior art more clearly, the following briefly describes the drawings used in the description of the embodiments or the prior art. Apparently, these attached drawings are merely examples of the present invention, and persons of ordinary skill in the art can obtain other drawings based on these attached drawings of the present invention without creative efforts.

It is a structural block diagram of the conventional parking sensor system. FIG. 2 is a structural block diagram of a hostless parking sensor system. FIG. 5 is a structural block diagram of a hostless parking sensor system in a tandem configuration. FIG. 2 is an internal structural view of an integrated parking sensor system. FIG. 2 is a structural block diagram of a master-slave compatible parking sensor support system. It is an internal block diagram of the parking sensor assistance system compatible with a master slave type | mold shown in FIG.

  Hereinafter, embodiments of the present invention will be further described with reference to the attached drawings. The embodiment described clearly is one example of the preferred implementation of the present invention, but is not intended to limit the scope, and the others obtained by those skilled in the art based on the embodiment of the present invention without creative efforts. All embodiments of are within the protection scope of the present invention.

  As shown in FIGS. 5 and 6, a master-slave compatible parking sensor support system according to the present invention comprises a master sensor 3 and at least one slave sensor 4, and the number of slave sensors 4 is an actual need. For example, one, two, three, four, five, six or seven, and so on may be eleven, and in the case of this embodiment, eleven. I will explain. The master sensor is displayed as Sensor 1, abbreviated as S 1, and 11 slave sensors are displayed as Sensor 2 to Sensor 12, respectively, and abbreviated as S 2 to S 12. Only three slave sensors 4 are shown in FIG.

  The master sensor 3 includes a CPU module 31, a first ultrasonic sensor 32, a master drive module 33, a master amplifier module 34, a slave drive module 35, and power supply modules 36 and 37 for power feeding. The number of slave sensors 4 is the same, and slave drive module 35 and slave sensor 4 are connected in a one-to-one correspondence. For example, since 11 slave sensors correspond to 11 slave drive modules, each slave drive A module is connected to each slave sensor. The slave sensor 4 is a digital probe without a CPU, and the slave sensor 4 includes an ultrasonic IC 41, a boost drive module 42, and a second ultrasonic sensor 43. The CPU module 31 receives the first ultrasonic sensor 32 through the master drive module 33. The first ultrasonic sensor 32 amplifies the reflection signal through the master amplifier module 34 and transmits it to the A / D conversion module of the CPU module 31, and the CPU module 31 transmits the ultrasonic IC 41 of the slave sensor 4 through the slave drive module 35. The ultrasonic IC 41 drives the second ultrasonic sensor 43 through the boost drive module 42, and the second ultrasonic sensor 43 feeds a reflection signal to the A / D conversion module of the CPU module 31 through the ultrasonic IC 41. -Clicking.

An ultrasonic IC (ASIC) is used inside all slave sensors to achieve a wider sensing range and stronger immunity to interference. Voltage stabilization processing, transmission drive, reception amplifier, digital processing, digital output and the like are integrated in the ultrasonic IC. The CPU module of the master sensor transmits a communication command to each ultrasonic IC in order to set the configuration parameter of each ultrasonic IC. Parameters that can be set in an ASIC (ultrasound IC) include, but are not limited to:
1. Amplification gain (Amplification amount of signal)
2. Drive current (drive power)
3. Cutting threshold (valid signal capture threshold)
4. Filtering bandwidth (a valid signal can not be entered unless the interference bandwidth is filtered)
5. Drive frequency (Match the frequency of ultrasonic sensor itself)
6. Temperature value (can read internal problem of ASIC)
7. Detection distance (detectable distance)
8. Transmission pulse (The number of pulses transmitted at one time. The larger the number of pulses and energy, the farther the detection distance.)
9. User memory (stores production information such as version number and production date)

  Communication commands between the CPU module and the ASIC: for example, if the CPU module sends different low level widths to the ASIC, it represents different commands. For example, radio wave transmission instruction, interception instruction, radio wave transmission and interception instruction etc. IC internal parameters (configuration parameters such as the above amplification gain, drive current, drive frequency, cutting threshold, etc.) are executed under control by digital communication commands from the CPU module, and the configuration parameters are permanently stored or energized It is set at time.

As a further modification, in the master-slave compatible parking sensor assistance system according to the present invention, the power supply module includes the first power supply module 36 and the second power supply module 37, and the first power supply module 36 supplies the CPU module 31. The second power supply module 37 is used for power supply to each slave sensor 4. As shown in FIGS. 5 and 6, in order to realize independent feeding of the second power supply module, there are three pins in the housing of the slave sensor, and signal pins , negative pins and positive pins extracted from the ultrasonic IC provided, there is a pin at least 3N to the housing of the master sensor, the signal pin being withdrawn from the slave drive module, the anode pins being withdrawn from the second power source comprises a cathode pin, the anode pin and the cathode pin of the second power supply module, each The signal pin of the slave drive module is connected to the negative pin and the positive pin of the slave sensor, and the signal pin of the slave drive module is connected to the pin of the ultrasonic IC.

  Since the signal line 44 and the power line 45 are separately installed and operated independently, only the current flows through the power line 45 and only the signal is transmitted to the signal line 44, the detection distance of the parking sensor support system is further distanced, It reaches 2.5 to 5 cm. Also, installing the signal line and the power line separately can fulfill the role and function of a better ASIC, the energy supplied by the ASIC becomes larger, and the signal in the signal line is more stable and reliable. Moreover, since interference from the power line to the signal line is eliminated, the resistance to interference is strong.

  Therefore, the second power supply independently supplies power to each slave sensor, and separately installing the power line and the signal line achieves a synergy effect with each slave sensor ASIC, and a master-slave type compatible parking sensor Improve the performance of support systems such as capacity and monitoring distance, energy, signal amplitude and immunity to interference.

  Based on the improved performance, the master sensor S1 controls the slave sensors S2 to S8 in parallel and can simultaneously perform multiprocessing to realize single transmission and multi reception, multi transmission and multi reception signal processing, and improve response speed It can be done. For example, when the master sensor S1 transmits a monitoring signal, the slave sensors S2 to S8 feed back the monitoring signal in parallel. Send multiple times and receive multiple times. Since there is no interference from the power supply lines, the response speed of the signal lines is greatly improved. Further, since the master sensor S1 itself also plays a role of a probe, it receives control by the CPU module and performs monitoring simultaneously with the slave sensors S2 to S8.

As shown in FIGS. 5 and 6, the CPU module of the master sensor is provided with input ports for receiving the signal of the reverse gear R, the speed signal SPD, and the switching signal SWT . In addition, an output port for outputting a buzzer signal BUZZER , a light emitting diode control signal LED and a data communication signal DATA is provided in the CPU module of the master sensor. In addition, it is connected to other components of the vehicle through hard wire / LIN / CAN, and transmits data of a master-slave compatible parking sensor support system to other components of the vehicle to make an alarm.

  The above is clearly a specific description of possible embodiments of the present invention, but does not limit the protection scope of the present invention, and equivalent embodiments and modifications without departing from the spirit and scope of the present invention. Are within the protection scope of the present invention.

Claims (6)

It has a master sensor and at least one slave sensor,
The master sensor includes a CPU module, a first ultrasonic sensor, a master drive module, a master amplifier module, a slave drive module, and a power supply module for supplying power.
The number of slave drive modules and the number of slave sensors are the same, the slave drive modules and the slave sensors are in a one-to-one connection, the slave sensors are digital probes without a CPU, and the slave sensors are ASICs , The CPU module includes a boost drive module and a second ultrasonic sensor, and the CPU module drives the first ultrasonic sensor through the master drive module, and the first ultrasonic sensor amplifies a reflection signal through the master amplifier module. / transmitted to D converter module, the CPU module drives the ASIC slave sensor through slave drive module, the ASIC drives the second ultrasonic sensor through boosting drive module, the second ultrasonic sound The wave sensor feeds back the reflected signal to the A / D conversion module of the CPU module through the ASIC ,
The power supply module includes a first power supply module and a second power supply module, the first power supply module is used to supply power to the CPU module and the second power supply module, and the second power supply module is connected to each slave sensor in parallel. A master-slave compatible parking sensor support system characterized in that it is used for power supply . There are three pins in the housing of the slave sensor, a signal pin drawn from the ASIC , a negative pin , and a positive pin , and 3N or more pins in the housing of the master sensor, a signal pin drawn from the slave drive module, anode pin drawn from second power supply comprises a cathode pin, the anode pin and the cathode pin of the second power supply module is connected to the negative pin and the cathode pin of the slave sensors each pin of a signal pin of the slave drive module ASIC The master-slave compatible parking sensor support system according to claim 1 , wherein the parking sensor support system is connected to the master slave. It said CPU module, to set the configuration parameters of each ASIC, parking sensor support system is compatible with the master-slave type according to claim 1, characterized in that can transmit communication commands to the ASIC. The master-slave type according to claim 1, wherein the CPU module of the master sensor is provided with an input port for receiving the signal of the reverse gear R, the speed signal SPD and the switching signal SWT. Parking sensor support system. 2. The master-slave type according to claim 1, wherein the CPU module of the master sensor is provided with an output port for outputting a buzzer signal BUZZER , a light emitting diode control signal LED and a data communication signal DATA . There is a parking sensor support system.   The master-slave compatible parking sensor support system according to claim 1, wherein the number of the slave sensors is 1-11.

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