Device for determining the compressive properties of products made of elastic materials

 

Device for determining the compressive properties of products made of elastic materials can be used for monitoring the stability of pressure during medical treatment and rehabilitation medicine, as well as in light industry for determining the compressive properties of textile fabrics, PPE and their elements made of elastic materials. The device includes a source of air supply turbine compressor, air line, inverter air pressure in the air line to the pressure of the compression means is a flap valve and the measuring unit is a solid state pressure sensor of the capacitive type and a microprocessor with display. When this turbine compressor is connected with the flap valve in the air line through the damping capacity, and the flap valve is a flat rubber capacity with two petals and the output gap. The device improves the efficiency measurement of compression exerted by elastic materials on the human body due to the automation of the measuring process, resulting in reduction of time and the/p>

The invention relates to the field of measuring and test equipment, particularly to a device for measuring the local pressure on the human body, provide compression elements and clothing from elastic materials. The device can be used for monitoring the stability of pressure during medical treatment and rehabilitation medicine (including space and sports medicine), as well as for determining the compressive properties of textile fabrics in light industry, personal protective equipment and their elements made of elastic materials (seal of the facial parts, hoods, gas masks and respirators, latex and rubber), with hygienic assessment.

A device for measuring the local pressure of the facial parts of means of individual protection of respiratory organs (ripm), including electro-pneumatic sensor (EPD), which is a hermetically sealed chamber made of PVC film in the form of a circle with a diameter of 20 mm, on the inner walls of which are fixed two electrical contact with stainless steel in the form of a fine mesh connected with an electrical circuit, in which uklocation it with a pressure gauge, connecting the pump to the sensor.

The electropneumatic transducer (EPD) in working condition located between the front part of the RPE and the skin of the human face and secured with medical tape. In EPD on air line pumps air with a rubber pump. When aligning the air pressure inside the EPD and the pressure of the front part of the ripm (the onset of dynamic equilibrium), it is breaking of electrical contacts EPD measured by the voltmeter. The value established at this point, the pressure registered by the pressure gauge [1] (prototype).

The disadvantages of the known devices is the need for visual control of the onset of dynamic equilibrium, which is determined by the voltmeter, use the manual feed air, requiring certain skills to ensure a smooth air supply, and the complexity of the design, creating inconvenience in the operation of the device. Other disadvantages are the complexity of the measurement process resulting from the use of the calculation method of determining the desired compression after conducting a series of measurements and significant measurement error.

The task of the claimed invention is povazie of the measurement process, reduce measurement error, reduce the duration and complexity of the measurement process.

The problem is solved in that the device for determining the amount of compression exerted by elastic materials on the human body, containing the source of air supply, air line, inverter air pressure in the air line to the pressure of the compression means and the measuring unit, according to the invention as a pressure transducer air pressure researched product use flap valve in the form of a flat rubber containers with two petals and the output gap, as the source of air supply use turbine compressor connected to the flap valve air line through the damping capacity, and as the measuring unit used solid-state pressure sensor of the capacitive type, connected by an air line with a flap valve, and a microprocessor with display.

Flap valve operable placed between the compression device and the human body. In the flap valve in the air line from the compressor, air is injected. Upper petal valve is Anna side. The time of pressure-balancing (the onset of dynamic equilibrium) is recorded by the pressure sensor of the capacitive type, which converts the steady pressure into an electrical signal (the frequency of the oscillating circuit), which is measured by the microprocessor and displayed on the LCD display.

The main feature of the proposed device is used as a pressure transducer flap valve having (compared to EPD) simpler design, higher sensitivity, which leads to decrease measurement error, and allowing for easy and tight connection with an air line. The presence of the turbine compressor provides automated (continuous, rhythmic and continuous in time) supply air flap valve. The presence of damping capacity ensures uniformity of air flow in flap valve and eliminates pressure surges of air in the air line, which significantly reduces measurement error. The use of the measuring unit in the form of a pressure sensor of the capacitive type, microprocessor and display can significantly reduce time izmeritelnaya magnitude compression in digital terms.

Diagram of the device for determining the compression shown in the drawing.

The area investigated scar the surface of the body post burn patients wear compression product of knitted fabric large elasticity performed anthropometric dimensions of this field, a mathematical algorithm for calculating the design and location of the affected area. Between the compression device and the patient's body gently without bends placed flap valve 1 so that its entire surface was covered with a compression product, the air line 2 should not be in a twisted condition.

After you connect the device to AC power and turn compressor 3 starts the flow of air through air line 2 through the damping capacity of 4 to flap valve 1, while on the display begin to appear quickly successive current values of the air pressure in the air line. Upper petal valve 1 is under pressure supplied air from the inner side and the compression pressure of the product from the outside. At the time of alignment of external and internal pressures breaking occurs Lepe is otdyha in air line 2, corresponding to the pressure of compression products, registered a measuring unit that includes a pressure sensor 5, a microprocessor 6 and the display 7. Registered pressure appears in numerical terms, and kept for some time on the display screen 7 and is fixed by the user. Received the desired amount of pressure must be specified in the "therapeutic" range pressure (10-25 mm RT.article ), which is a necessary criterion for assessing the suitability of the test products for compression therapy of post-burn scars.

The proposed device allows to increase the efficiency of determining the compression exerted by elastic materials on the human body, due to the automation of the measuring process, reducing time and increasing measurement accuracy, convenience and accessibility during operation of the device.

The proposed device is used with compression therapy post burn patients, when designing the costumes for cyclists and swimmers, when designing a compression means for the prevention of hemodynamic disorders in astronauts, testing upregulation, the.In. Vasiukov, G. E. kobyliansky and other Hygienic research PPE people /Leadership. -M., 1992, S. 135-138.

Claims

Device for determining the compressive properties of the products of an elastic material containing a source of air supply, air line, inverter air pressure in the air line to the pressure of the compression means and the measuring unit, characterized in that as the pressure transducer air pressure compression means use a flap valve in the form of a flat rubber containers with two petals and the output gap, as the source of air supply use turbine compressor connected to the flap valve air line through the damping capacity, and as the measuring unit used solid-state pressure sensor of the capacitive type, which is connected by an air line with a flap valve, and microprocessor with display.

 

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FIELD: textile industry.

SUBSTANCE: the invention is dealt with textile industry, in [auricular, with methods of control a linear density of a fibrous floor in the loading pocket of a breaker. The method provides for a pneumatic transportation of fibers, its distribution among the loading pockets, supply of an air stream through pneumonic chambers with perforated walls, conducting definition of a linear density of the fibrous floor with the help of the gauge, differed in the fact, that a linear density of the fibrous floor determine according to an average value of a definite number of measurements of the gauge. At that the number of indications of the gauge for definition of the average value of the linear density is calculated according to a dependence: where: n-amount of measurements of the gauge of a linear density of a band; L-length of a fibrous floor from a section of perforated walls up to the feeding cylinder, m; l - a width of perforated walls of the loading pocket, m; Ts - scheduled duration of a shift, hours; τ -an interval of time between readings of indications of the gauge, hours. Use of the given method ensures an increase of uniformity of a fibrous floor, formed in the loading pocket of a breaker.

EFFECT: the invention ensures an increase of uniformity of a fibrous floor, formed in the loading pocket of a breaker.

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