SU932262A1 - Device for checking specimen mass change - Google Patents

Description

one

The invention relates to instrumentation and can find application in those areas of science and technology where it is necessary to make a continuous and stationary measurement of the change in sample mass, for example, in research laboratories and in process control in chemical and other industries related to solid-state physics. and thermal physics.

A weighing device is known, comprising a housing with a liquid in which a float is placed, carrying a load receiving platform LH.

The disadvantage of the device is that it does not provide the required accuracy of registration and does not have sufficient reliability during operation.

The closest in technical essence to the present invention is a weight measuring device comprising a housing with a liquid, a float carrying a load-receiving platform.

a registration system, a photoelectric displacement transducer, and a transducer light source installed on the G2 weighing platform.

The drawback of the device is that it is not reliable for the study of the kinetics of the samples under changing environmental conditions and does not provide sufficient accuracy. In the process of research, fluctuations in temperature and pressure are possible, which introduces large disturbances and indications of the device.

The purpose of the invention is to increase accuracy and reliability under changing external conditions.

Claims (2)

The goal is achieved by the fact that the device is equipped with a hollow transparent stand fastened to the load-receiving platform and pivotally connected through the supports to the float, one part of which is made in the form of a hollow torus, and the second part - in the form of a chamber - a load associated with the stand and immersed into a liquid, with the load cell equipped with a temperature sensor, a photoelectric transducer moving inside the rack inside you, and the torus cavity communicated with the housing space. The contact of the supports with the torus is made through strain gauges associated with the registration system. Windows are made in the upper suit of the body. The drawing schematically shows the device, a longitudinal section. The device consists of a sealed enclosure 1 with a bracket 2 for installation in a strictly upright position of the enclosure; a float 3 floating in a transparent working fluid and pivotally connected through a tenso. or piezoelectric sensors 5 and supports 6 with a stand 7, inside of which a sensitive panel 8 is placed, a float displacement transducer; load cells 9 | fixed to the bottom of the hour rack 7; cargo reception platform 10dl sample 11; a temperature sensor comprising a photosensitive panel 12 forming with the transparent wall 13 and the bottom of the body of the load cell 9 a sealed cavity and a gap for a transparent temperature sensitive thermometer liquid; sources of light emission, respectively, of the displacement transducer and the teomometer 15 and 16, mounted on the supports of the lower part of the torus 3 (float; windows with enclosing surface 17 for (source of radiation)) heating the sample; nozzles 18-21. The device works as follows. set in a strictly horizontal position with the help of an adjustable bracket 2. The load cell 9 at the same time sets up a stand 7 with a platform 10 of sample 11 to a working position. Through a window 1 with a transparent fence, sample 11 is affected, For example, optically by radiation. The sample warms up and begins to lose mass. Piezo or strain gauge 5 is unloaded by the amount of sample mass lost and the recording system senses the signal. and an increase in the emf on the photosensitive panel 8, transmits a signal to the recording system I (not shown). Two signals from strain gauges and a photoelectric converter estimate the decrease (or increase) of the sample mass. When the sample is grown, the pressure on the piezo or strain gauges increases, and the float is immersed in liquid. The float is set to zero with the help of additives to the working fluid, which changes its concentration, or the fluid itself. Increase the dowlation in the system, i.e. In the housing 1 through the pipes 18 and 19. When using the device, in addition to the required accuracy and reliability, the dimensions of the working chamber are reduced, the possibility of duplication appears, which is important when studying kinetics. The need for a year in such devices thousand units. Invention 1. A device for controlling sample mass change, including a housing with a liquid, a float carrying a load-receiving platform, and a registration system with a photoelectric transducer of displacement, so that, in order to improve accuracy and reliability the changing external conditions, the device is equipped with a hollow transparent stand, fastened to the load-receiving platform and pivotally connected via float to the float, one part of which is made in the form of a hollow torus, and the second part - in the form of a load cell bound with a rack and immersed in a liquid, which chamber is provided with a load-temperature sensor, the photoelectric transducer is mounted inside the rack and the torus cavity communicates with the housing space. 2. The device according to claim 1, wherein the contact of the supports with the torus is made through strain gauges associated with the registration system.