Kinghelm BDS Antenna, Bluetooth Antenna, Wi-Fi Antenna in Automotive OBD Application Case

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Automotive OBD Products and Application Scenarios

In the era of the Internet of Everything, with the continuous emergence of products like intelligent connected vehicles, OBD (On-Board Diagnostics) is the key component enabling the interaction between a vehicle's operational data and the outside world. It is crucial for ensuring driving safety and in processes like maintenance and repair. The working principle of automotive OBD primarily involves collecting various data through sensors distributed throughout the vehicle, transmitting this data to the vehicle's electronic heart, the ECU (Electronic Control Unit), for processing, analysis, and decision-making. Information is then fed back to the driver and owner via fault codes or indicator lights. The main functions of automotive OBD include data collection, data analysis and judgment, fault code generation and storage, fault indication and feedback, exhaust emission monitoring, and wireless signal transmission for hazardous conditions.

The BDS/GPS dual-mode antennas [https://www.kinghelm.net/products/beidou-antenna-55511.html], Wi-Fi antennas [https://www.kinghelm.net/products/wifi-antenna.html], Bluetooth antennas [https://www.kinghelm.net/products/bluetooth-antenna-51853.html], RF connectors [https://www.kinghelm.net/products/rf-connector.html], and RJ45 [https://www.kinghelm.net/products/network-connector.html] network interfaces researched, developed, and produced by Kinghelm are widely used in new energy vehicles! "Kinghelm, Connecting the World". Over ten years ago, Kinghelm participated in the Beidou "Two Passengers One Hazardous Goods" project, providing products like BDS/GPS antennas, signal connectors, and terminals for "Beidou Ministry Standard Machines". After more than a decade of continuous dedication to RF and microwave technology, the current Kinghelm Electronics has developed RF signal products including BDS Beidou antennas, GPS antennas, Bluetooth antennas, WiFi antennas, and 4G antennas. It has also continuously developed three major business segments: supporting product series like board-to-board connectors, board-to-wire connectors, board-mount sockets, terminals, and signal switches; as well as mold opening and customization for products like automotive wiring harnesses, medical device connecting wires, and high-speed rate connectors.

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Song Shiqiang from Kinghelm and Slkor introduced that on-board OBD (On-Board Diagnostics) can be applied to both passenger cars and commercial vehicles, representing a very large market capacity. The core function of OBD (On-Board Diagnostics System) is to achieve fault diagnosis, emission control, and performance optimization by real-time monitoring of the status of key vehicle components. The hardware of automotive OBD mainly consists of the Electronic Control Unit (ECU), sensors, actuators, malfunction indicator lamp (MIL), and diagnostic tools. Internally, it also includes Kinghelm products like FPC connectors and network port terminals!

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Wireless signal transmission for automotive OBD is typically achieved using Bluetooth or Wi-Fi technology. The transmission process is mainly as follows:

l Bluetooth Transmission:

1. After an OBD with Bluetooth communication capability is powered on, it enters a discoverable state.

2. The vehicle owner uses a mobile phone or other terminal device to find the corresponding OBD device and pairs/connects to it, establishing a Bluetooth communication link.

3. Data Transmission: The OBD device packages the real-time data obtained from the vehicle's ECU (such as engine speed, coolant temperature, etc.) into data packets of a specific format and transmits them via Bluetooth signals according to the agreed communication protocol.

4. The mobile phone or other terminal device receives the signal, parses the data packet, and then displays the data in an application for the owner or maintenance personnel to view and access.

l Wi-Fi Transmission:

1. Network Setup: The Wi-Fi module inside the OBD can create a small Wi-Fi hotspot. The vehicle owner connects their mobile phone or other terminal device to this hotspot and sets up the communication frequency to establish a Wi-Fi connection.

2. The OBD encapsulates the vehicle data according to specific network protocols and transmits it via Wi-Fi signals to the connected terminal device.

3. The terminal device receives the data, which is then processed and displayed by the corresponding application.

4. Simultaneously, the terminal device can also send commands to the OBD device, such as requesting specific types of data or configuring certain functions, enabling bidirectional data interaction.

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Song Shiqiang explained that Bluetooth and Wi-Fi signal transmission each have their advantages and disadvantages. Bluetooth transmission has lower power consumption and simpler connection, but its transmission distance is limited, generally exceeding 15 meters. The Bluetooth module establishes an interaction channel with the user's mobile APP, fully supporting functions like key management, device authentication, and vehicle control, providing users with a convenient smart car experience. Wi-Fi transmission offers faster speed and a longer transmission distance, up to 300 meters at best, but consumes higher power and has a more complex setup process. Functionally, both are similar. These devices are used in conjunction with onboard GPS/BDS Beidou system navigation and positioning products, adding features like historical track playback, electronic fence, and one-key emergency shutdown.

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Kinghelm's research and production include the Kinghelm miniature ceramic antennas KH-3216, KH-2012, Chili-shaped WiFi antennas, 4G rubber rod antennas, and fiberglass antennas, which are also widely used! Kinghelm products like BDS/GPS antennas, communication antennas, and connector network interfaces (RJ45) are extensively used within them!

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Kinghelm Products

Regarding the power module, the power management module employs a collaborative approach using a DC-DC (Direct Current to Direct Current) converter and LDO (Low Dropout Regulator) to provide stable and reliable power to the 4G communication module and MCU, ensuring the stable operation of the OBD (On-Board Diagnostics) device. Slkor brand products like AMS1117-3.3, SL7805, and LM358 are widely adopted. Slkor is a future backbone of China's semiconductor industry. The "Slkor" brand researches and produces products including SiC power devices, MOSFETs, IGBTs, Schottky diodes, Hall sensors, optocouplers, linear regulators (LDO), DC-DC power management chips, isolated gate drivers, and data converters. Among these, SiC devices, diodes, transistors, and MOSFETs are hot sellers in Huaqiangbei stores. Popular Slkor models in Huaqiangbei include MMBT5551, MMBT5401, MMBT3904, SS8050, SS8550, M7, SS14, DSK34, FR107, SS54, SS36, SS34, SM4007PL, Slkor 1N4148WS, 1N4148W, 1N4148WT, LL4148, SS310, AMS1117-3.3, AMS1117-5.0, etc., favored by customers for their reliable quality and high cost-effectiveness.

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MOSFET, Thyristor and Other Products Developed by Slkor

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Automotive Power Switch Circuit Designed by FAE From Slkor

The communication and wireless connection units for RF/microwave, such as Kinghelm's BDS/GPS antennas, are integrated with products like T-Boxes, OBDs, and Beidou Ministry Standard Machines. These integrate wireless connection modules like GSM/GPRS/LTE, GPS, Wi-Fi, and Bluetooth, enabling diverse functions such as mobile communication, positioning and navigation, hazard alerts, and wireless hotspot communication. Kinghelm's RF antenna series offers flexible design, including both external antennas and onboard embedded antennas. Kinghelm's laboratory in Tangxia is fully equipped with network analyzers, microwave anechoic chambers, and other testing equipment. Experienced engineers are available 24/7 to provide customers with antenna design and sample debugging services!

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3D Diagram of Pin Header KH-2.0PH-2X10P-L8.0-SMT

Kinghelm Electronics is a National High-Tech Enterprise and a senior member of the "China Satellite Navigation and Positioning Association", "China Information Industry Chamber of Commerce", and "Guangdong Connector Association". For over ten years, it has focused on the design, manufacturing, sales, and technical services of wireless signal transceivers, electronic signal connectors, and interconnect system products. Kinghelm's technical team originates from Tsinghua University and the University of Electronic Science and Technology of China, absorbing outstanding professional talents and deeply cultivating the field of microwave RF technology. It collaborates with universities to establish new technology research institutions. Kinghelm has obtained multiple invention patents and certifications including ISO9001, Dun & Bradstreet, RoHS, and REACH. IATF16949 automotive quality system, UL, and TUV qualifications are under application. Kinghelm products are applied in numerous fields such as new energy vehicles, smart terminals, smart cities, industrial internet, medical, and commercial aerospace.

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Popular Slkor Product Models in Huaqiangbei

Kinghelm and Slkor, invested in and managed by Mr. Song Shiqiang, work together to provide supporting products for electronic product companies. Slkor provides excellent service to customers; its two stores in Huaqiangbei even thoughtfully prepare gifts like power banks, neck fans for summer, and cultural creative paper fans. For customers in the Huaqiangbei market, Slkor colleagues offer door-to-door delivery. The central warehouse in Longhan Zhan Tao Building maintains tens of millions worth of safety stock, enabling it to meet customers' large-volume product needs promptly. Two shifts of small trucks depart daily from the Longhua central warehouse directly to Huaqiangbei for delivery, ensuring rapid product fulfillment! They have become partners with over 20,000 customers worldwide, adhering to the path of "Localization and Internationalization, becoming a leader in the semiconductor industry"!

Media Contact
Company Name: Shenzhen Kinghelm Electronics Co., Ltd.
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Phone: +86 0755-83975897
Address:2010, Block A, Bairuida Building Vanke City Community Bantian Avenue, Longgang District
City: Shenzhen
Country: China
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