GPS positioning sensor circuit and vehicle-mounted module
By introducing a combination of linear voltage regulator and FLASH modules, low power consumption and stable operation of the vehicle GPS module are achieved, solving the problems of high power consumption and data loss, improving positioning accuracy and system stability, and adapting to diverse application needs.
Patent Information
- Application Number
- CN202422933125.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing vehicle GPS positioning modules have high power consumption, weak battery life, and are difficult to recover in the event of an abnormal power outage. They also lack data storage functionality, which affects long-term stable operation.
A linear voltage regulator module is used to achieve on-demand power supply and intelligent sleep function. Combined with a FLASH module to store the operating data of the GPS module, a high-sensitivity GPS antenna and 0402 packaged capacitors are used. An I2C interface is added, and a reasonable circuit shielding structure is designed to reduce interference and ensure positioning accuracy and stability.
It effectively reduces power consumption, ensures that the configuration state can be retained after abnormal power outages, improves positioning accuracy and system stability, supports diverse application scenarios, and reduces development costs.
Smart Images
Figure CN223565899U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sensor technical field, especially GPS positioning sensor circuit and vehicle-mounted module. BACKGROUND
[0002] In the related art, the GPS positioning module, especially the GPS positioning module of vehicle, is usually powered by external battery or power adapter, and the power management unit is relatively basic, and the power consumption is relatively high, which leads to weak battery endurance, and it is difficult to restart and recover in the case of abnormal power failure, which is not conducive to the long-term stable operation of the GPS positioning module. SUMMARY
[0003] The utility model discloses at least one of the technical problems in the prior art is solved, and therefore, the utility model provides a GPS positioning sensor circuit and vehicle-mounted module, which can meet the requirements of low power consumption and stable operation.
[0004] In one aspect, the utility model discloses a GPS positioning sensor circuit, which comprises:
[0005] The MCU module has a first power supply end, a first interface end and a communication interface end, and the communication interface end of the MCU module is connected with a communication interface.
[0006] The GPS module has a second power supply end, a second interface end and a third interface end, and the second interface end of the GPS module is connected with the first interface end of the MCU module.
[0007] The FLASH module has a third power supply end and a fourth interface end, and the fourth interface end of the FLASH module is connected with the third interface end of the GPS module.
[0008] The linear voltage stabilizing module has a first enable end, a power input end and a power output end, the first enable end of the linear voltage stabilizing module is connected with an enable interface, the power input end of the linear voltage stabilizing module is used for connecting a superior power supply circuit, and the power output end of the linear voltage stabilizing module is connected with the first power supply end of the MCU module, the second power supply end of the GPS module and the third power supply end of the FLASH module.
[0009] According to some embodiments of the utility model, the second power supply end of the GPS module is connected with a first decoupling capacitor, and the first decoupling capacitor is connected with a reference voltage end.
[0010] According to some embodiments of the utility model, the GPS module further has a battery power supply end, and the battery power supply end of the GPS module is connected with a battery module.
[0011] According to some embodiments of the present application, the GPS module is connected with a diode, the positive pole of the diode is connected with the power output end of the linear voltage stabilizing module, and the negative pole of the diode is connected with the battery power supply end of the GPS module.
[0012] According to some embodiments of the present application, the GPS module further has a power supply control end, and the power supply control end of the GPS module is connected with the MCU module.
[0013] According to some embodiments of the present application, the GPS module is further connected with a first resistor and connected with a radio frequency module through the first resistor.
[0014] According to some embodiments of the present application, the GPS module further has a time synchronization end, and the time synchronization end is connected with an LED.
[0015] According to some embodiments of the present application, the GPS module adopts an integrated circuit module with a model of ATGM336H-5N.
[0016] According to some embodiments of the present application, the MCU module adopts an integrated circuit module with a model of N32L403KBQ7.
[0017] On the other hand, the present application provides a vehicle-mounted module comprising the GPS positioning sensor circuit.
[0018] The present application has at least the following advantages:
[0019] The linear voltage stabilizing module has a first enable end, can realize on-demand power supply and intelligent hibernation function, effectively reduces power consumption, can meet the low power consumption requirement, the third interface end of the GPS module is connected with the fourth interface end of the FLASH module, the FLASH module is used for storing the running data of the GPS module, so that the GPS module can still keep the last configuration state after restart or accidental power failure, and the stability requirement of operation can be met.
[0020] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0021] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0022] Figure 1 It is a principle block diagram of the GPS positioning sensor circuit of the present application;
[0023] Figure 2 It isFigure 1 Circuit schematic diagram of GPS module of GPS positioning sensor circuit shown;
[0024] Figure 3 For Figure 1 Circuit schematic diagram of MCU module of GPS positioning sensor circuit shown;
[0025] Figure 4 For Figure 1 Circuit schematic diagram of FLASH module of GPS positioning sensor circuit shown;
[0026] Figure 5 For Figure 1 Circuit schematic diagram of linear voltage stabilizing module of GPS positioning sensor circuit shown. DETAILED DESCRIPTION
[0027] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.
[0028] In the description of the present application, the meaning of "several" is one or more, the meaning of "multiple" is two or more, greater than, less than, more than, etc. are understood as not including the number, "above", "below", "within", etc. are understood as including the number. If there is a description of "first", "second", etc. is only used to distinguish the technical features for the purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.
[0029] In the description of the present application, unless otherwise explicitly limited, "have", "connect" and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.
[0030] In the related art, the GPS positioning module usually contains basic satellite signal reception, data processing and communication functions, and common GPS positioning modules include products developed by u-blox, Mediatek, Quectel and other companies. These modules can be widely used in navigation, vehicle positioning and remote device monitoring fields. However, the GPS positioning module in the related art has the following disadvantages:
[0031] 1) Conventional GPS positioning module design:
[0032] Single GPS receiver: Many existing positioning sensor modules use a single GPS receiver (such as UBlox, MTK series) to receive satellite signals and perform position calculation. These modules can provide relatively accurate position data in most normal environments, but in environments with limited signal or strong interference, positioning accuracy and stability are reduced.
[0033] External sensor integration: To improve accuracy and stability, related technologies usually integrate auxiliary sensors such as accelerometers and gyroscopes for data fusion. This integration method is usually basic, and the processing and fusion algorithm is relatively simple, which may not be able to meet the high-precision positioning requirements in high-speed and complex environments.
[0034] 2) Power management and power consumption control:
[0035] Traditional GPS positioning modules usually use external batteries or power adapters for power supply. The power management unit is basic, and the power consumption is high, resulting in short battery life during long-term use, which is not suitable for devices that need to run for a long time.
[0036] In some low-power design, usually use low-power microcontroller (such as ARM Cortex-M series), but for the demand of high-precision positioning, there is still a balance problem between power consumption and processing capacity, which cannot guarantee high precision while effectively reducing power consumption.
[0037] 3) Modular and integrated design:
[0038] Current positioning sensor modules mostly use traditional rectangular or circular packaging, with low integration, large size and poor adaptability, which cannot meet the needs of small devices such as drones and smart wearable devices.
[0039] 4) Single interface, poor compatibility:
[0040] Most GPS modules provide a single communication interface (such as UART), which leads to insufficient compatibility with other devices. Some application scenarios require SPI or I2C interface, but many modules do not support these interfaces, limiting the applicability of the module. Lack of multi-interface modules may require additional conversion hardware when connecting different types of control devices, increasing development difficulty and cost.
[0041] 5) Lack of data storage function:
[0042] Most existing modules do not have data storage function, which is difficult to restart and recover in the case of abnormal power failure, which is not conducive to the long-term stable operation of GPS positioning module.
[0043] The embodiment discloses a vehicle-mounted module including a GPS positioning sensor circuit. Please refer to Figure 1The GPS positioning sensor circuit comprises an MCU module 100, a GPS module 200, a FLASH module 300 and a linear voltage stabilizing module 400. The MCU module 100 has a first power supply end, a first interface end and a communication interface end. The communication interface end of the MCU module 100 is connected with a communication interface. The GPS module 200 has a second power supply end, a second interface end and a third interface end. The second interface end of the GPS module 200 is connected with the first interface end of the MCU module 100. The FLASH module 300 has a third power supply end and a fourth interface end. The fourth interface end of the FLASH module 300 is connected with the third interface end of the GPS module 200. The linear voltage stabilizing module 400 has a first enable end, a power supply input end and a power supply output end. The first enable end of the linear voltage stabilizing module 400 is connected with an enable interface. The power supply input end of the linear voltage stabilizing module 400 is used for connecting a superior power supply circuit. The power supply output end of the linear voltage stabilizing module 400 is connected with the first power supply end of the MCU module 100, the second power supply end of the GPS module 200 and the third power supply end of the FLASH module 300.
[0044] The linear voltage stabilizing module 400 has the first enable end, can realize on-demand power supply and intelligent sleep function, effectively reduces the power consumption, and can meet the low-power consumption requirement. The third interface end of the GPS module 200 is connected with the fourth interface end of the FLASH module 300. The FLASH module 300 is used for storing the running data of the GPS module 200, so that the GPS module 200 can still keep the last configuration state after restart or accidental power failure, and can meet the stability requirement of running.
[0045] The GPS module 200 adopts an integrated circuit module with the model of ATGM336H-5N. The MCU module 100 adopts an integrated circuit module with the model of N32L403KBQ7. The capacitors and resistors used in the circuit all adopt the packaging specification of 0402, so that the high integration of the circuit can be realized.
[0046] Please refer to Figure 2 The second power supply end (such as the 8th pin) of the GPS module 200 is connected with a first decoupling capacitor, as shown by the mark C91 in the figure. The first decoupling capacitor is connected with a reference voltage end (such as a ground end). The first decoupling capacitor can perform power decoupling for the GPS module 200, so that a stable and reliable power input is obtained, which is beneficial to improving the stability of running.
[0047] The GPS module 200 also has a battery power supply end (such as the 6th pin). The battery power supply end of the GPS module 200 is connected with a battery module, as shown by the mark U44. In the case of abnormal power failure of the linear voltage stabilizing module 400, the GPS module 200 can be switched to the battery module for power supply, which is beneficial to improving the running stability and reliability of the GPS module 200.
[0048] The GPS module 200 is connected with a diode, as shown by the mark DG1, the positive electrode of the diode is connected with the power output end of the linear voltage stabilizing module 400, and the negative electrode of the diode is connected with the battery power supply end of the GPS module 200, the diode is used for preventing reverse voltage or power surge, thereby improving the stability of the circuit operation.
[0049] Please continue to refer to Figure 2 The GPS module 200 also has a power supply control end, as shown by the mark ON / OFF corresponding to the 5th pin, the power supply control end of the GPS module 200 is connected with the MCU module 100. The MCU module 100 can send a power supply control signal to the power supply control end of the GPS module 200, thereby controlling the start or shutdown of the GPS module 200, and further realizing on-demand power supply, which is beneficial to realize low-power operation according to different application scenarios.
[0050] The GPS module 200 is also connected with a first resistor (as shown by the mark R75), and is connected with a radio frequency module through the first resistor, as shown by the mark U37. The first resistor is used for limiting current or providing additional filtering function for the radio frequency module, and the radio frequency module is used for connecting an external GPS antenna, for signal stabilization.
[0051] The GPS module 200 also has a time synchronization end (such as the 4th pin), which is connected with an LED. The GPS module 200 provides a PPS (Pulse Per Second) signal interface for time synchronization, the PPS signal is output through the GPS module 200, is kept synchronized with an external processor, ensures the accuracy of the time stamp of the positioning data, and is beneficial to improve the positioning accuracy.
[0052] In addition, the 9th pin of the GPS module 200 is connected to the 14th pin, the data transmission pins (2nd and 3rd pins) are respectively connected to the 10th and 11th pins of the MCU module 100, and the 16th and 17th pins of the GPS module 200 are I2C signal ends, which are respectively connected to the corresponding ends of the FLASH module 300. The FLASH module 300 can be used for temporarily saving data such as position signal and time stamp, which is very useful for application scenarios (such as navigation track) that need to record historical positioning data.
[0053] Please refer to Figure 3The 2nd and 3rd pins of the MCU module 100 are respectively connected to an external crystal circuit, the 4th pin of the MCU module 100 is connected to a resistor (indicated by R57), and the 5th pin is connected to a power output end (3.3V power supply) of the linear voltage stabilizing module 400, for realizing the power supply and reset functions of the MCU module 100. The MCU module 100 reserves a plurality of data transmission interfaces (such as GPS_RXD, GPS_TXD, UART_TXD2, and UART_RXD2), the 30th pin of the MCU module 100 is reserved as a reset pin, the 23rd and 24th pins are used as debugging interface pins, for serial line debugging of the MCU module 100, and the 31st pin is connected to a resistor, for setting a boot mode.
[0054] Please refer to Figure 4 The 1st, 2nd, 3rd and 4th pins of the FLASH module 300 are all connected to a reference voltage end, and the 8th pin of the FLASH is used as a third power supply end and is connected to the linear voltage stabilizing module 400. The FLASH module 300 is used for storing program codes and configuration information, for supporting the normal operation of the GPS module 200, and the commonly used configuration information can be stored in the FLASH module 300, wherein the commonly used configuration information includes positioning frequency, communication parameters and power consumption mode, etc., and the configuration information is still retained after power-off, so as to ensure that the previous configuration state can be automatically recovered after restart. In addition, the FLASH module 300 also has a data log recording function. The non-volatility of the FLASH ensures that the stored content will not be lost even after power-off, which plays an important role in stable operation and long-term data preservation.
[0055] Please refer to Figure 5 The linear voltage stabilizing module 400 adopts an integrated circuit, the 1st pin of the linear voltage stabilizing module 400 is used as a power input end, the power input end is connected to a superior power supply circuit, and the power input end is also connected to a reference voltage end through a second decoupling capacitor (indicated by C77), the 5th pin of the linear voltage stabilizing module 400 is used as a power output end, and the power output end is connected to two parallel decoupling capacitors for smoothing the power output and ensuring the stability of the power supply. The 3rd pin of the linear voltage stabilizing module 400 is used as an enable end, which can receive an external enable signal, so as to realize on-demand power supply or intelligent sleep according to different application scenarios.
[0056] In summary, the embodiment has the following beneficial effects:
[0057] Improved power management circuit: by introducing the linear voltage stabilizing module 400 and the start-stop control (such as the enable function), the on-demand power supply and intelligent sleep functions are realized, and the power consumption is effectively reduced. In addition, the response speed of the linear voltage stabilizing module 400 is improved after entering the standby mode, so as to ensure that the normal working state can be quickly restored, so as to meet the real-time positioning requirements.
[0058] High-precision anti-interference design: a reasonable circuit shielding and grounding structure is designed at the signal receiving end to reduce the influence of external electromagnetic interference on the positioning accuracy. In addition, a high-sensitivity GPS antenna is selected to ensure high positioning accuracy in weak signal environments.
[0059] Low noise and high ripple rejection ratio: the design of the linear voltage stabilizing module 400 helps to reduce power supply noise, which is necessary to improve the overall performance and reliability of the system.
[0060] Space-limited layout challenge: the GPS module 200 uses an integrated circuit with model ATGM336H-5N, which has the advantages of small size and high precision, and the MCU module 100 uses an integrated circuit with model N32L403KBQ7, so that high-density integration can be achieved in a space-limited vehicle environment without sacrificing performance.
[0061] Multi-interface compatible design: in addition to the standard UART interface, the application also adds an I2C interface, increasing compatibility with external devices and supporting diverse application scenarios. This design can reduce dependence on additional hardware conversion modules, reduce system cost, and improve development efficiency.
[0062] Non-volatile feature: a FLASH module 300 is designed to ensure that the stored content will not be lost even if power is lost, and the GPS module 200 has data recording function. The FLASH module 300 can also temporarily save data such as location information and time stamp, which plays an important role in stable operation and long-term data preservation. The GPS module 200 can still retain the last configuration state after restart or power failure, which is particularly important for devices that need to run stably for a long time.
[0063] The above describes the embodiments of the application in detail in combination with the drawings, but the application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the application.
Claims
1. A GPS positioning sensor circuit, characterized by The GPS positioning sensor circuit comprises: an MCU module having a first power supply end, a first interface end and a communication interface end, wherein the communication interface end of the MCU module is connected with a communication interface; a GPS module having a second power supply end, a second interface end and a third interface end, wherein the second interface end of the GPS module is connected with the first interface end of the MCU module; a FLASH module having a third power supply end and a fourth interface end, wherein the fourth interface end of the FLASH module is connected with the third interface end of the GPS module; a linear voltage stabilizing module having a first enable end, a power supply input end and a power supply output end, wherein the first enable end of the linear voltage stabilizing module is connected with an enable interface, the power supply input end of the linear voltage stabilizing module is used for connecting a superior power supply circuit, and the power supply output end of the linear voltage stabilizing module is connected with the first power supply end of the MCU module, the second power supply end of the GPS module and the third power supply end of the FLASH module.
2. The GPS positioning sensor circuit of claim 1, wherein, The second power supply end of the GPS module is connected with a first decoupling capacitor, and the first decoupling capacitor is connected with a reference voltage end.
3. A GPS positioning sensor circuit according to claim 1 or 2, characterized in that, The GPS module further has a battery power supply end, and the battery power supply end of the GPS module is connected with a battery module.
4. The GPS positioning sensor circuit of claim 3, wherein, The GPS module is connected with a diode, the anode of the diode is connected with the power supply output end of the linear voltage stabilizing module, and the cathode of the diode is connected with the battery power supply end of the GPS module.
5. The GPS positioning sensor circuit according to claim 1 or 2, characterized in that, The GPS module further has a power supply control end, and the power supply control end of the GPS module is connected with the MCU module.
6. The GPS positioning sensor circuit of claim 1, wherein, The GPS module is further connected with a first resistor and is connected with a radio frequency module through the first resistor.
7. The GPS positioning sensor circuit according to claim 1 or 6, characterized in that, The GPS module further has a time synchronization end, and the time synchronization end is connected with an LED.
8. The GPS positioning sensor circuit of claim 1, wherein, The GPS module adopts an integrated circuit module with a model of ATGM336H-5N.
9. The GPS positioning sensor circuit according to claim 1 or 8, characterized in that, The MCU module adopts an integrated circuit module with a model of N32L403KBQ7.
10. An in-vehicle module, characterized by, The GPS positioning sensor circuit comprises: an MCU module having a first power supply end, a first interface end and a communication interface end, wherein the communication interface end of the MCU module is connected with a communication interface; a GPS module having a second power supply end, a second interface end and a third interface end, wherein the second interface end of the GPS module is connected with the first interface end of the MCU module; a FLASH module having a third power supply end and a fourth interface end, wherein the fourth interface end of the FLASH module is connected with the third interface end of the GPS module; a linear voltage stabilizing module having a first enable end, a power supply input end and a power supply output end, wherein the first enable end of the linear voltage stabilizing module is connected with an enable interface, the power supply input end of the linear voltage stabilizing module is used for connecting a superior power supply circuit, and the power supply output end of the linear voltage stabilizing module is connected with the first power supply end of the MCU module, the second power supply end of the GPS module and the third power supply end of the FLASH module. The second power supply end of the GPS module is connected with a first decoupling capacitor, and the first decoupling capacitor is connected with a reference voltage end. The GPS module further has a battery power supply end, and the battery power supply end of the GPS module is connected with a battery module. The GPS module is connected with a diode, the anode of the diode is connected with the power supply output end of the linear voltage stabilizing module, and the cathode of the diode is connected with the battery power supply end of the GPS module. The GPS module further has a power supply control end, and the power supply control end of the GPS module is connected with the MCU module. The GPS module further is connected with a first resistor and is connected with a radio frequency module through the first resistor. The GPS module further has a time synchronization end, and the time synchronization end is connected with an LED. The GPS module adopts an integrated circuit module with a model of ATGM336H-5N. The MCU module adopts an integrated circuit module with a model of N32L403KBQ7. The GPS positioning sensor circuit comprises: an MCU module having a first power supply end, a first interface end and a communication interface end, wherein the communication interface end of the MCU module is connected with a communication interface; a GPS module having a second power supply end, a second interface end and a third interface end, wherein the second interface end of the GPS module is connected with the first interface end of the MCU module; a FLASH module having a third power supply end and a fourth