Engineering vehicles are equipped with backup alarms to provide clearer reversing prompts in the factory area

Core Summary

When reversing construction vehicles, the driver faces challenges due to the large blind spots in the cab and high ambient noise, making it insufficient to rely solely on the rearview mirror and driver's experience. A certain equipment factory has installed DIGISOUND backup alarms on forklifts and small construction machinery, leveraging IP67 protection and continuous audible tones to provide a more stable and audible sound prompt during reversing in the factory area, reducing pauses caused by poor hearing and ensuring smoother material transfer.

I. Background: The Dilemma of Reversing in the Factory Area

The products of this equipment factory need to be transferred back and forth between the workshop and the open storage yard. During reversing, the engine noise and the sound of gravel on the ground mix together, and the original simple buzzer is drowned out from a few meters away. Drivers have to repeatedly lean out to confirm, which is inefficient and also anxiety-inducing.

II. Issues: The Audible Tone Does Not Travel Far and Water Ingress Is a Concern

There are two specific challenges on site. One is that the sound attenuates quickly in a noisy environment, and the backup audible tone cannot reach the people who need to be reminded. The other is that vehicles often operate outdoors, and water splashes onto electrical components during rainy days and washing, rendering ordinary buzzers unusable for long.

III. Key Considerations During Selection

• Protection Level: At least capable of preventing water splashes, with IP67 being a safe and secure option.

• Sound Generation Method: Continuous tones are easier to detect in noise than intermittent tones.

• Operating Temperature: The equipment is exposed outdoors all year round, and it needs to sound in both winter and summer.

• Installation: Small size, simple wiring, and capable of being directly connected to the backup signal

IV. Plan and Implementation: Parallel Connection Meets Sound

They chose DIGISOUND's waterproof backup alarm, which automatically sounds continuously when the reverse gear is engaged, in response to the reverse gear signal. The device itself is IP67 protected, so washing and rain exposure have no impact. The installation did not require any modifications to the existing wiring; it simply involved connecting a control line in parallel.

V. Results and Value: More Confidence in Reverse Driving

After the installation, the surrounding personnel can hear the reverse warning prompts in a noisy environment in a timely manner, eliminating the need for drivers to frequently get off the vehicle to confirm, thus significantly improving the efficiency of the transfer process. After operating for a quarter, the alarm functioned normally even during rainy weather and after washing, without any reduction in sound volume due to water ingress.

VI. Review: Selection of Alarm Components Based on the Environment

The experience from this modification is that when selecting alarm components, it's not just about whether they "can sound", but also about whether they "can sound clearly" in real-world environments. Factors such as protection level, operating temperature, and sound generation method often have a greater impact on practical use than the nominal volume. Clearly listing the actual operating conditions of the vehicle can lead to more accurate component selection.

VII. Preparatory Information for Similar Modifications

If other factories or fleets want to carry out similar modifications, it is recommended to first organize several pieces of information to facilitate communication:

• Vehicle type and reverse signal source (whether it is powered by the reversing lights or connected to a separate switch)

• Noise level in the daily operating environment and whether there is water spray or washing

• Temperature range that the equipment will experience throughout the year (especially in outdoor winter conditions in the north)

• Requirements for the form of the warning sound (continuous tone, pulse tone, or whether multiple tones are required for distinction)

• Whether the existing wiring can be connected in parallel and whether there is enough space for the alarm device installation

By listing these in a table, suppliers can directly provide appropriate protection levels and sound generation solutions, eliminating the need for back-and-forth prototyping.

>The case serves as an application reference, with specific models and parameters subject to DIGISOUND's original documentation and on-site operating conditions. Shanghai Qinuo can assist in verifying the protection and power supply conditions for reverse alarms and device prompt components.