Summary:

The electric vehicle alarm is a safety device that detects abnormalities through sensors like vibration and displacement, triggering audio-visual alarms to deter theft. It supports functions such as remote locking and vehicle tracking, and some models can also alert users of system malfunctions. The device features adjustable sensitivity, low power consumption, and interference resistance, making it widely used in two-wheeled and three-wheeled electric vehicles. High-end models integrate GPS positioning and remote monitoring, providing real-time protection via mobile phones.

 

1、The technical bottleneck needs to be broken through

Although the electric vehicle alarm technology has been widely used in various places, it still faces a series of professional technical challenges.

In the context of false alarms and missed alarms, the complex and ever-changing external environment often interferes with the alarm system, leading to its false triggering and unnecessary alerts. Moreover, for minor anomalies, the alarm may fail to detect them due to improper sensitivity settings, making it challenging to strike a precise balance between false alarms and missed alarms.

In terms of power consumption and endurance, with the continuous integration and improvement of electric vehicle alarm function, its energy consumption is also increasing. This makes the traditional battery endurance difficult to meet the needs of long-term stable operation of the alarm, bringing a lot of inconvenience to users.

In terms of communication distance and stability, the performance of electric vehicle alarm in remote monitoring and alarm function is often limited by signal blocking or interference. This leads to the alarm may not be able to timely and accurately transmit information at critical moments, affecting its actual utility.

In terms of data security, with the popularization of wireless communication and networking functions, electric vehicle alarms are also faced with risks such as data leakage and malicious hacking. This may not only bring property losses to users, but also pose a threat to their personal privacy.

In addition, the electric vehicle alarm has shortcomings in environmental adaptability. In extreme temperature, humidity, dust and other harsh conditions, the performance of the equipment is often easy to decline, thus affecting its service life and reliability. This makes it difficult for the alarm to play its due role in some special environments.

2、Corebai solutions

The three products launched by Corebai, CBMV358, CBM1117 and CBM3085, provide key support for electric vehicle alarms from the dimensions of signal processing, power management and communication transmission, and jointly build efficient and stable solutions:

Electric vehicle alarm application block diagram

l The operational amplifier (OPA) is recommended CBMV358

CBMV358 operational amplifier has the characteristics of high gain and low noise, which can accurately capture and amplify the weak signal output by the sensor of the electric vehicle alarm, and perform filtering processing to effectively prevent the false alarm or missed alarm caused by signal distortion, so as to improve the sensitivity of the alarm to abnormal conditions.

l The CBM1117 is recommended for low voltage differential linear regulator (LDO)

CBM1117 voltage regulator can convert unstable battery voltage into stable DC power with its low static current and low voltage difference characteristics, ensuring that all modules of the alarm get a continuous and stable power supply. This not only reduces the power consumption of the system, but also effectively extends the service life of the alarm and ensures its long-term stable operation.

l The recommended interface chip (RS485) is CBM3085

The CBM3085 interface chip, with its robust anti-interference capabilities and long-distance transmission advantages, facilitates data exchange between the alarm system, vehicle electronic systems, and remote monitoring platforms. This ensures that alarm information and vehicle status are promptly and accurately transmitted to the owner's terminal, providing strong support for remote monitoring and management. The collaboration among these three components significantly enhances the performance and reliability of electric vehicle alarms.

3、Detailed solution

1. CBMV358 is a general-purpose operational amplifier with the following characteristic parameters:

    

l High gain characteristics: The amplifier has a high open-loop voltage gain, which can reach more than 100dB in typical values. It can effectively amplify weak signals and meet the requirements of signal amplification for sensor signal conditioning. Even extremely small input signal changes can be amplified into recognizable and processable output signals.

l Low noise performance: The input noise voltage density of the amplifier is low, which effectively reduces the noise interference introduced in the signal processing process and ensures the purity of the output signal. For applications with high requirements on signal quality, such as sensor signal processing of electric vehicle alarm, it can avoid misjudgment caused by noise.

l Wide power supply voltage range: The amplifier usually supports a wide power supply voltage range of 3V to 36V, which is suitable for low-power battery powered devices as well as stable operation in traditional power supply systems, and can flexibly adapt to product designs with different power supply conditions.

l Track-to-track output: The output voltage swing of the amplifier is close to the power rail, and a large output dynamic range can be achieved throughout the power supply voltage range, making full use of the power supply voltage and improving the accuracy and efficiency of signal processing.

2. CBM1117 is a low voltage difference linear regulator LDO with the following characteristic parameters and advantages:

 

l Low voltage difference characteristics: the voltage difference is low. When the rated output current is output, the voltage difference is only a few hundred millivolts. Compared with traditional voltage regulators, it can stabilize the output under the condition of small difference between input voltage and output voltage, effectively reduce power consumption, improve power supply efficiency, and prolong the battery life of power supply equipment.

l High precision output: the output voltage accuracy is high, and the typical accuracy can reach ±1%. It provides a stable and reliable power supply for circuit modules with high requirements on voltage stability, ensures the normal operation of equipment, and reduces the performance degradation or failure caused by voltage fluctuation.

l Low static current: The static current is small, even in light load or standby state, it only consumes very little current, further reducing the power consumption of the system, especially suitable for power-sensitive portable devices or battery powered devices.

l Fast transient response: It can quickly respond to the change of load current, quickly adjust the output voltage when the load changes suddenly, maintain the stability of voltage, ensure the stability of power supply, and adapt to the dynamic load demand.

3. CBM3085 is an RS485 communication chip with the following characteristic parameters and advantages:

l Long distance communication: The communication distance is long. Under standard conditions, the transmission distance can reach thousands of meters, which is suitable for the occasions requiring long distance data transmission. No additional relay equipment is required, reducing the system cost and complexity.

l Strong anti-interference capability: It has excellent anti-electromagnetic interference (EMI) and anti-radiation interference (RFI) capability, which can work stably in complex electromagnetic environment, such as industrial field, vehicle environment, etc., to ensure the accuracy and reliability of data transmission, and avoid data loss or error.

l Multi-node communication: Multi-point communication is supported. Multiple device nodes can be connected on an RS485 bus network, which is convenient to build complex communication network and meet the application requirements of large-scale data acquisition, monitoring and so on.

4、 Application scenarios

Relying on the strong research and development capability of Corebai  Company and deep integration of cutting-edge technology, electric vehicle alarm, with its anti-theft, monitoring and other functions, has been widely used in many scenarios, providing a solid guarantee for vehicle safety:

（1）In daily parking scenarios, such as open-air parking lots or underground garages in residential areas, shopping malls, and schools, electric vehicles are often parked densely, making them easy targets for theft. The alarm system can trigger an alert when the vehicle is tampered with or moved, effectively deterring potential thieves. For example, when a car owner is shopping at a mall, the alarm system can effectively protect the vehicle's safety.

（2）In unattended outdoor settings, such as when electric vehicles are temporarily parked at the entrances of street-side shops or near markets, the alarm's vibration sensing and displacement monitoring functions can promptly detect any unusual activity. If a thief attempts to steal, the loud alarm will alert the surrounding crowd.

（3）In the long-distance transportation scene: for electric tricycles in the process of long-distance transportation, they may pass through complex roads and unfamiliar areas. The alarm can not only provide anti-theft function, but also enable the owner to know the real-time location of the vehicle with some products equipped with GPS positioning function, so as to effectively prevent the loss of goods and vehicles.

（4）In the scene of family yard: When parking an electric car in a family yard or private parking shed, the alarm can be linked with the home security system. When abnormal vehicles are detected, it can not only sound an alarm, but also push information to the owner's mobile phone, so that the owner can know the situation in time even if he is not at home.