Optical and acoustic analysis control equipment
Optical and acoustic analysis control equipment

qmtmultisens offers an anechoic test environment combining different inspection methods with the possibility of handling the product. It is an acoustically insulated enclosure under controlled light. It allows the operator's hands to pass through, without degrading the sound insulation, in order to be able to handle the product while carrying out opto-acoustic analyzes. The equipment is equipped with a camera which allows the product to be viewed for recording and processing. The system also records the acoustic signals emitted by the product synchronously with the image based on a time reference. The software allows the piloting and interfacing of the equipment in the customer's environment as well as the advanced analyzes of images and sounds.

The strengths of the QMTMultiSens:
  • Synchronized and highly sensitive opto-acoustic measurements
  • Anechoic chamber to isolate the product from the external environment
  • Product handling while maintaining sound insulation
  • Software with acquisition, backup, replay and analyzes

A first example of application is in the field of high-end watchmaking for the adjustment and control of striking watches.

Fit For You (F4U)
some products

some products

F4U program
Solution on

Solution according to notebook

M4U program
OEM program

Custom product
industrialized by QMT

OEM program
QMTMultiSens technologies
an anechoic test environment combining different inspection methods with the possibility of handling the product

In line with its strategy of providing Mechatronic Multiple Inspection Systems (M 2 IS), QMTMultiSens is an anechoic test environment combining different inspection methods with the ability to manipulate the device under test (DUT). In its first version, QMTMultiSens is configured for opto-acoustic analysis: it combines industrial vision with acoustic acquisition and analysis.

Isolation of the product from noise and vibrations

In order to be able to analyze the acoustic characteristics of a device in a reproductive and reliable manner, the use of an anechoic chamber (or "anechoic chamber") is essential. This experimentation environment has walls which absorb sound waves, thus causing no echo that could disturb the measurements. The anechoic chamber is also isolated from acoustic disturbances coming from the outside, namely airborne and structural noise: certain vibrations are transmitted by the structure (walls, ceilings and floors) and others by air. The performances are an aerial isolation (50dB), with complete decoupling, and solid.

Product handling while maintaining sound insulation

It is possible to run your hands through the equipment to handle the product while maintaining sound insulation. It is thus possible to characterize the acoustic and optical response of a product during its handling.

Optical system

The optical system consists of a 2 MPixel camera with a 105 x 60mm field of view. A diffuse lighting allows the acquisition of high definition images or films.

The acoustic system

A high sensitivity sensor allows the acquisition of the acoustic signal from 6.5 to 80dB, with a bandwidth of 5Hz to 20kHz.

QMTMultiSens applications
Opto-acoustic characterization
Setting and checking striking watches

A first example of application is in the field of high-end watchmaking, where the setting and control of striking watches is a major challenge. Three main reasons make the task very complex:

  • The isolation of the watch from ambient noise and vibrations is not obvious
  • The faithful reproduction of the sounds produced by the watch, in a manner that is repeatable by one device or reproducible between several devices, is complex
  • The handling and adjustment of the acoustically isolated watch can, in principle, only be done in an anechoic chamber.

QMTMultiSens is therefore the table equipment suitable for a high-end manufacturing workshop and which meets these three needs. It allows the watchmaker to adjust the ringing complication using an opto-acoustic measurement and analysis tool. Automatic quality control over different test durations is also feasible and easy. QMTMultiSens allows the following analyzes in an automatic or semi-automatic way:

  • Automatic time detection
  • Ring duration measurement
  • Detection of notes of hours, quarters (case of mechanisms with 3 gongs), as well as measured minutes
  • Measurement of the intervals of hours / quarters (mechanisms with 3 gongs) or hours / minutes (mechanisms with 2 gongs), as well as those of quarters / minutes (mechanisms with 3 gongs)
  • Measurement of the sound level of the strike and its signal-to-noise ratio (SNR)
  • Note duration detection with statistical reports
  • Detection of notes of hours, quarters (case of mechanisms with 3 gongs), as well as measured minutes
  • Measuring the tempo of notes
  • Penalty in relation to criteria defined by the operator
Other applications

The equipment is versatile and can be adapted to other applications in watchmaking but also in other industries. The software functions required by the different applications will be added according to the needs of the applications.

QMTMultiSens software
Software for control, acquisition, backup, replay and analyzes

The software makes it possible to control the whole as a stand-alone system with the possibility of interfacing an external command or exchanging data with the customer's databases. It is one of the key elements of the system, as it is endowed with advanced means of analysis of images and sounds.

Product customization
The adaptation of a product according to your specific need
Personalization with the Fit For You program (F4U)

Qmt products can be customized from both a hardware and software point of view. The first level of software customization is the addition of additional functions or the development of a personalized function. It is also possible to personalize the equipment, for example by modifying the field of vision or by adding incident lighting.

Your product with the OEM program

On the basis of qmt products, it is proposed the realization of labeled product on behalf of our customers who can be private or marketed by themselves

“More than 100 systems are produced each year for a large number of customers”
List of References
QMTMultiSens Specifications
Optical and acoustic analysis control equipment
Functions QMTMultiSens QMTMultiSens-F4Y
Field of view [mm] 105 x 160 According to specifications
Optical resolution [Mpixels] 2 According to specifications
Acoustic measurements 6.5 to 80dB, with a bandwidth of 5Hz to 20kHz According to specifications
Soundproofing aerial (50dB), with complete decoupling, and solid According to specifications
Lighting Diffuse According to specifications
Measurement software QMTMultiSens According to specifications
Measurement cycles Manual and continuous with automatic event detection According to specifications
Signal processing Functions for controlling strike watches According to specifications
Computer science External PC in Windows 10 According to specifications
Dimensions (H x W x D) [mm]
(without computer)
580 x 650 x 680 According to specifications
Item code A260800002-01 -
QMTMesure software functions
All solutions are based on unique software functions

For optical control

To increase production yields
and the quality of the parts

For aesthetic control

For acoustic and vibration control

Control devices
Measurement and control at the edge of lines and in laboratories
Qmt Creations
Six product lines

Customized software developments with the qmtm4u program and standard software such as qmtmesure

Acquisition and processing of signals with software, hardware, acquisition hardware and sensors

Autonomous, they are dedicated to measurement for control by sampling in production and for the laboratory

Completely automatic from the feeding of the parts to the control: any non-conforming part is thus ejected and therefore the quality control is 100% guaranteed

Embedded and distributed systems

They operate autonomously with acquisition, processing and control to supervise and automate

Test benches

physical systems making it possible to put a product in configurable and controlled conditions of use in order to observe and measure its behavior