Powerless vehicle detection system

Energy harvesting for IoT products

Self-powered sensing

Generating power from the movement (vibration) of objects

Providing solutions to power the IoT market
with self-powered sensing technologies
by developing and manufacturing
vibration-powered devices

Vibration-powered device = Power generated through ambient power or energy harvesting

Wireless sensor network

In the era of M2M and IoT,
countless sensors 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 intervention.

・IoT (Internet of Things):

A wide range of data is collected from a variety of devices.
The data can be analyzed to extract insights never before achieved and improve work efficiency and accuracy.

However, launching a wireless sensor network
has many challenges that must be overcome, primarily:

How is power supplied to the sensing devices?

1) It is not practical to connect power cables to countless sensing devices.
2) Batteries are an option, but they have drawbacks:

  • Loss of power over time
  • Trade-off between real-time accuracy and battery reserves
  • Cost of changing batteries and other maintenance
  • Equipment damage or other problems resulting from power outages caused by dead batteries

Points for selecting sensors:

Ease of placement

Easy installation, relocation, and retrofitting

Running cost and other costs

Cost of changing batteries, and cost to business of low or no power

Sensor accuracy

Real-time data, and high accuracy

Orbray’s vibration-powered devices are the solution.

Our vibration-powered sensors are easy to install and have low running and other costs.
They are highly accurate and provide real-time data.

The possibilities of self-powered sensors

powerless sensors

The possibilities of powerless sensors


Orbray’s self-powered devices are custom made according to customer needs, including the type of sensor, data transmission method,
and communication frequency.

The principle behind Orbray’s vibration-powered devices

Electromagnetic induction (magnetostrictive method)

  • Our devices use a simple mechanical design.
  • Electricity is generated by changes in relative position.


Changes in magnetic flux create electrical potential in the coil.

Current is generated.

Features and advantages of our proprietary vibration-powered devices

High power output is achieved:

Dozens to several hundreds of mW greater output
than conventional vibration power generation devices.

Device Name Reference Video Power Generation Event Ave.
mW mJ
Slide type 36x20x165mm Shaking 140 -
Rotating - 7
Switch type 36x20x130mm Pushing button - 5
Releasing button - 5
Knob type 36x20x180mm Releasing slide - 9
Curve type R150(H100)x40mm Shaking 100 -
Tilting 15 -
Rotating - 30
Lever type 50(pull-80)x80x140mm Pushing lever - 30
Pulling lever - 30
Hinge type Φ45x80mm Rotating - 30

* Output depends on the speed of the motion.

We offer a great lineup of products, with various sources of power:

From shaking something by hand, to using the rotational energy of a door opening and closing, to capturing the downward movement of a button being pushed,
we excel at creating electric power from specific, repetitive movements.

We are able to utilize a wide range of vibration sources. Working closely with our customers,
we find custom solutions that meet their specific needs.

Simple mechanical design

Small lot sizes
Custom orders

Durability of generator: over 10 million actuations*

* Add notes regarding product components, internal experiments

Wireless transmission demonstration

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

920MHz band-specific low-power radio

One shake:
10∼20 transmissions

Wireless system for short- and 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 powered 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 cover a wide variety of vibration sources. The amount of power that can be generated depends 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 vibration-powered 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. Durability 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?
Vibration devices are about 30 x 20 x 50 mm and roughly 60 g, depending on the 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 have prioritized durability and reliability.
Q:How should vibration 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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