R & D

PTB performs fundamental research and development work in the field of metrology as a basis for all the tasks entrusted to it in the areas concerning the determination of fundamental and natural constants, the realization, maintenance and dissemination of the legal units of the SI, safety engineering, services and metrology for the area regulated by law and for industry, as well as technology transfer. Only fundamental research work performed by PTB itself using latest technologies will enable it to ensure on a long-term basis its metrological competence recognized on the international level, and to extend it further.

The application of modern management tools enables PTB to perform the tasks entrusted to it efficiently and thoroughly. For the long term, PTB's work program has been adapted to the requirements of its clients - trade and industry, science and society - also within the European framework. The initiation of project work guarantees flexibility when problems are to be solved on a short-term basis.

As a result of its close cooperation with universities, other research institutes and industry, PTB has become a member of the community of all those pursuing research in Germany, and it makes use of these links for the benefit of all those involved. The comparison with the national metrology institutes of other countries ensures constant critical assessment at the highest level of metrology. Together with our partners in the projects implemented within the scope of international cooperation, PTB ensures the comparability and reliability of measurement results everywhere in the world on a long-term basis.
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Simultaneous measurement of thermal conductivity, conductibility of temperature

What we offer

Conventional devices like transient instruments are less precise, more expensive and time consuming. The new devices can be used for measuring thermal conductivity, conductibility of temperature and specific heat capacity of solid materials, bulk materials, gels and liquids in a range from -100°C to +200°C. They allow enormous time savings while maintaining the precision.
The device suits the needs of SMEs working in the range of rational use of energy, power engineering, process engineering, alternative fuels and insulating materials and can be adapted to individual needs. Only a short training is necessary to make full use of it.
The instrument's software optimises the measuring process to guarantee a measurement as short and as precise as possible.

What we are looking for

The institute is searching for partners for a licence agreement.

Collaboration sought

  • Research & Development
  • Licence Agreement

Responsible

General purpose micro mounting manipulator, offering 6 envelopes and a reproducibility of < 1 µm

What we offer

A research institute from Braunschweig (Germany) has developed a high precision manipulator for general purposes in micro mounting. The device offers six envelopes and a reproducibility of less than 1 micrometer. The German institute is searching for industrial partners interested in a licence agreement.
Description: The high precision micro mounting manipulator offered by the German research institute has been developed to mount miniaturised sensor and parts in the production of measuring equipment.

The device offers advantages over micro mounting equipment which is already on the market, as existing solutions are often high specialised, their kinematics offers only a few envelopes and their turning circles are often limited. Furthermore, the possibility of observations with the steering camera is also limited, as the camera has to be integrated into the moving parts of the device.

The offered micro mounting manipulator is widely applicable because it offers six envelopes, a reproducibility of less than 1 µm (minimal linear movement is 0,1 µm, the minimal circular motion is less than 1´) and can operate cameras controlled in a cylindrical working space with a height of 25 mm and a radius of 30 mm. The turning angles reach around +/-90 degrees and around +/- 180 degrees depending on the rotation axis.

The handled objects can be manipulated with either mechanical or vacuum claws, which are also available. The whole process can be observed from two vertical projections without the risk of collision. The steering of the manipulator is guaranteed by a PC based system in one programming language. Essential movement and clawing movements can be done comfortably by a joystick.

The system offers a general purpose manipulator for different challenges in micro mounting with the opportunity of direct quality control.


Current and Potential Domain of Application:
Advantages and Innovations: The micro manipulator offers several advantages compared to the conventional high specialised micro mounting equipment:
- six envelopes,
- Broad turning angels (up to 180 degrees depending on the turning axle,
- High reproducibility due to exact tracking of movements,
- Control and observation by camera,
- Different claws for handling of objects available,
- integration in production process in vacuum.

What we are looking for

Industrial partners active in the development and production of equipment for micro mounting with interest in the production and marketing of the offered system under licence.

Collaboration sought

  • Licence Agreement

Responsible

Force Metrology

What we offer

The measurement of forces in mechanical engineering, in aerospace and in the energy and building industries needs procedures to guarantee nominal values for force transducers up to 30 MN with suitable traceability. Newly developed force transfer standards, configured as a build-up system of several reference transducers, have therefore to be investigated. In addition, parasitic components and different loading effects will be analyzed in order to consider these effects if the devices are used in industrial applications.

In Europe, there is an increasing demand to measure high nominal forces up to 30 MN, or higher, in many industrial applications such as, e.g., in civil engineering, or for the monitoring of forces in bridges and for the testing of steel and concrete materials. NMIs and calibration laboratories in industry usually use force standard machines with deadweights, hydraulic amplification, lever amplification, reference transducers or build-up systems to cover the force range up to 15 MN. However, there are neither written standards nor technical regulations for the consideration of parasitic components, multi-component influences or different time dependencies. Reliable models for the extrapolation of measurement results exceeding their calibration range have to be developed in this project to cover forces up to 30 MN and, in future, up to 50 MN.

The aim of this JRP is
• to improve the range of primary force standards from 1 MN up to 30 MN and to cover the range from 1 MN to 50 MN by force transfer standards,
• to develop improved transfer standards for forces up to 30 MN and 50 MN,
• to create uncertainty models for build-up force measurement systems for the high-force range,
• to develop methods to extrapolate calibration results for values higher than 15 MN force.

This project will generate new procedures, new software and new EURAMET technical guidelines.

What we are looking for

Users in calibration and testing laboratories for the use of high-force measurement devices, for methods of uncertainty calculation, and for improvements in the dissemination of force, from the primary standards to the calibration services and testing laboratories.

In addition, the integration of these results into the relevant standards is another strategy to disseminate the results.

Keywords

  • Standards
    • Quality Standards
    • Technical Standards

Collaboration sought

  • Research & Development
  • Technical Co-operation

Responsible

Innovative Fiber-detector coupling without parasitic absorption lines for applications in gas analysis

What we offer

A German research institute specialized in metrology has developed a fiber-detector coupling without parasitic absorption lines. In the field of optical gas analysis the method of Tunable Diode Laser Absorption Spectroscopy (TDLAS) is used more frequently. Here, the absorption of a gas is examined with tunable diode lasers. In this case a significant problem is the absorption, which occurs in the fiber system in front of the actual measuring cell and thereby leads to (variable) offset problems. With the innovative Fiber-detector coupling, developed by the German research institute, the offset uncertainty can be substantially reduced.
To avoid parasitic interference by the surrounding medium at a spectroscopic measurement, it is useful to inject the laser light via an optical fiber into the medium to be examined during TDLAS measurements, since within the optical fiber occurs no specific gas absorption. However, the coupling-region between the diode laser and the optical fiber represents a main issue for example during water vapor measurements. Both, in the research-oriented, as well as the commercial fiber-coupled diode laser may not just occur absorption independently from the external humidity, which means a constant absorption. This absorption is also dependently, which means a variable absorption.
By using the new Fiber-detector coupling innovated by the German research institute the initial absorption can be measured and the influence can be reduced. Through a complete integration of the open, surface-treated end of the optical fiber into a gas-impermeable, index-matched epoxy resin the beam path passes under controlled conditions to the detector. In the epoxy resin the light is being defocused, so that the anti-reflective coated detector is not locally saturated. Due to the angle in the arrangement optical interferences are also minimized. Another epoxy resin layer reinforced with glass powder is used to relief the fiber and seals the additional parts with a robust protection framework.

The fiber-detector coupling is currently being used in two airworthy hygrometers (SEALDH-II and HAI), where it reduces the offset uncertainty per meter of the absorption path about 120 ppmv/m to 4.5 ppmv/m in the 1.4 µm spectrometer path.

Due to the increasing offer of commercial gas analyzers based on TDLAS, the absolute accuracy will win as a distinguishing feature in importance, especially the consideration of the parasitic absorption plays a crucial role.

The offered fiber detector leads to the following advantages:
- The Fiber-detector coupling has no air gap.
- The influence of the ambient gas is reduced by measuring parasitic absorption in fiber-coupled spectrometers.
- Minimized interference effects.
- The device is vibration resistant.
- It can be used for applications in the gas analysis.

What we are looking for

The research institute is searching for partner interested in the acquisation of licences of the system.

Keywords

  • Measurement Tools
    • Optical material testing
    • Optical Technology

Collaboration sought

  • Licence Agreement

Responsible

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