Powerless vehicle detection system

Energy harvesters for IoT devices

Self-powered sensing

Generate power from the movement (vibration) of objects

Providing solutions to power the IoT market
With self-powered sensing technologies
By developing and manufacturing vibration power generation devices

Vibration power generation device = ambient power generation, energy harvesting,

Wireless sensor network

In the new era of Machine to Machine and IoT,
countless sensors will collect vast amounts of data, wirelessly,
supporting optimal control and management of essential processes.

・M2M (Machine to Machine):
Devices communicate with each other and execute accurate, real-time control, without the need for human interventions.

・IoT (Internet of Things):
A wide range of data is collected from a variety of everyday devices. The data can be analyzed to extract insights never seen before and improve work efficiency.

However, launching a wireless sensor network
Has many challenges that must be overcome.

How to supply power to the sensing devices?

1) It is not practical to connect power cables to countless sensing devices.
2) Batteries are an option, but they must be changed and require other maintenance

  • Self-discharge
  • Trade-off between real-time accuracy and battery reserves
  • Cost of changing batteries and other maintenance
  • Equipment damage from power outages caused by dead batteries

Points for selecting sensors


Easy installation, relocation, and retrofitting

Running Cost

Low power supply and battery change requirements

Sensor accuracy

Real-time and accurate

Adamant-Namiki vibration powered devices are the solution

Sensors with vibration power generators have excellent workability and low running costs.
They are highly accurate and provide real-time data.

The possibilities of self-powered sensors

powerless sensors

The possibilities of powerless sensors


Power generation devices are custom made according to customer needs, including the type of sensor, data transmission method, and communication frequency.

The principle behind Adamant-Namiki vibration power devices

Electromagnetic induction (magnetostrictive method)

  • Mechanical design
  • Based on changes in relative position


Changes in magnetic flux form electrical potential in the coil

Current is generated

Features and advantages of our exclusive vibration power generation device

High power output achieved

Several dozen to several hundred times the output of conventional vibration power generation devices (1mW).

Test results

Max. output  287 [mW]

Ave. output 76 [mW]

Great line up of products

Acceleration, impact, center of gravity, oscillation, switch, rotation, etc.

Can be applied to many different times of vibrational sources. Custom solutions are available based on your needs.

Simple mechanical design

Small lot sizes
Custom orders

Durability of generator over 2 million actuations

Wireless transmission demonstration

Several transmissions per movement
Reduce lost transmissions and improve transmission reliability and stability

Transmissions / 2.4GHz

With one motion
10∼20 times

Wireless system for short and long-long distance communication

Example applications

Security/Crime preventionIndustrial machineryTransportation/logisticsAgriculture/livestockDisaster prevention Medical/nursing
Example applications

Other applications

Frequently asked questions(FAQ)

Q:I would like to know what vibration power devices look like. Do you have any samples?
We have demonstration devices available. Please contact us for more details.
Q:Can any type of movement be used to generate electricity?
We have a diverse lineup of products that covers a wide variety of vibration sources. The amount of power that can be generated differs depending on the type of movement. We will optimize each device to meet your needs.
Q:We don't know the amount of vibrational energy available at the installation location. Can you help us measure the vibration and optimize the generator?
Of course! We will use accelerometers to measure the types and amounts of vibration and design your power generation device to meet your needs.
Q:What combination of sensors and transmitters are possible with self-powered sensing devices?
Any combination of sensors and wireless communications technologies commercially available is possible. It is also possible to set the vibration itself as the trigger.
Q:What is the minimum order size for prototypes?
There is no minimum order size for prototypes.
Q:How sensitive is the generator to the vibration frequency?
We design each device to generate power most efficiently at the given frequency. However, the Q-value of the resonance frequency is gentle so power is generated even before and after the design vibration event.
Q:How long do these devices last?
The power generation mechanism is semi-permanent. Actuators and other mechanical parts may have shorter lifespans. Durabilities of these parts can be adjusted to meet your needs.
Q:Can these devices be made waterproof?
Yes. This and all other design specifications can be defined by the customer.
Q:How big are the devices?
Vibrational devices are about 30 x 20 x 50 mm and roughly 60 g, depending on specifications.
Q:Is it possible to miniaturize the devices and install them in wearables?
Miniaturization is difficult. We have optimized our devices to be able to power commercially available sensors and transmitters with a single vibration event. Therefore, we have opted for larger sizes that capture more energy and prioritized durability and reliability.
Q:How should generator devices be installed?
We recommend using double sided tape or screw installation.
Q:Can sensor data be transmitted to our cloud network?
Yes. Sensor data can be collected at an IoT gateway and sent to any location you specify.


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