RU104309U1 - DEVICE FOR MEASURING MICROCLIMATE PARAMETERS - Google Patents

Abstract

 1. A device for measuring microclimate parameters, comprising a measuring head with sensors of temperature, humidity, air velocity, an analog-to-digital converter, a microprocessor, a battery and an indication unit, characterized in that the device further comprises at least one more measuring head and equipped with a separate temperature sensor for measuring the thermal load of the medium, placed in a black plastic ball, and radio modules for connecting the measuring heads to the display unit m radio channels, each measuring head further comprises a cooler for the temperature sensor airflow. ! 2. The device according to claim 1, characterized in that it is additionally equipped with at least one temperature sensor for measuring the thermal load of the medium.

Description

The utility model relates to the field of labor protection, namely, to control the microclimate at the workplace and is intended to measure temperature, humidity, air velocity (SDV), the index of the heat load of the medium (HPS), which affect the person at the workplace.

The known device Hot-wire anemometer + Hygrometer TKA-PKM model 60 (No. 24248-09 in the State Register of measuring instruments). It contains a measuring head with sensors for temperature, humidity, air flow rate and an indication unit, including an indicator that displays the measured information on the liquid crystal display. The analog outputs of the sensors from the measuring head are fed through a cable to a multi-channel analog-to-digital converter (ADC) located in the display unit. The conversion of the measured ADC values to the real values of temperature, humidity and ADD in the display unit is carried out by the microcontroller.

However, the known device does not allow to measure all the microclimate parameters necessary for their control: there is no possibility of measuring the HPS index, the ability to save the measured values in non-volatile memory, the inability to connect the device to a computer via a USB port for data transfer, which significantly reduces the performance of the certification organization during production control and certification of jobs.

As the closest analogue in technical essence, a device for measuring microclimate parameters is adopted — a temperature and humidity meter with the function of measuring the TNS-index TKA-PKM model 20 (No. 24248-09 in the State Register of Measuring Instruments), which contains a measuring head and an indication unit. The measuring head contains sensors for temperature, humidity, air velocity, an analog-to-digital converter (ADC), a microprocessor, and a battery. Determination of the THC index in the known device is made by recalculating the temperature sensor when measuring the air temperature and the same sensor when placed in a plastic container, the so-called "black ball".

The display unit contains an indicator for displaying information on a liquid crystal display, controls, microprocessor, non-volatile memory, power supply.

The analog output from the sensor unit enters through a cable into a voltmeter located in the display unit.

However, the known device cannot be used to control all microclimate parameters at the workplace, since it does not measure the air flow rate. In addition, to measure the THC index, this device uses time-spaced temperature sensor data.

The objective of the utility model is to create a device for measuring microclimate parameters, which allows controlling all microclimate parameters at the workplace and optimizing the measurement process as much as possible.

The essence of the utility model consists in the fact that the device for measuring microclimate parameters, from a measuring head with temperature, humidity, air velocity sensors, a digital converter, a microprocessor, a battery and an indication unit, consists of at least two measuring heads and is equipped with a separate temperature sensor for measuring the thermal load of the medium, placed in a black plastic ball, and radio modules for connecting the measuring heads to the display unit via a radio channel, when ohm each measuring head further comprises a cooler for the temperature sensor airflow.

The device is additionally equipped with at least one temperature sensor for measuring the thermal load of the medium.

Using the utility model allows to obtain the following technical result.

The device allows you to measure and control at the same time all microclimate parameters - temperature, humidity, air velocity and thermal load of the medium, to carry out simultaneous measurement of these parameters at several points at once by one operator, to store the measured data for many jobs in the non-volatile memory of the display unit, which significantly increases performance of the certifying organization during production control and certification of workplaces.

The technique of simultaneously measuring and processing the microclimate parameters inside the measuring head and transmitting the results digitally via the standard interface using a standardized data exchange protocol makes it easy to connect the measuring head not only to the display unit of a given type, but also through a special adapter adapter to a regular computer, including laptop, tablet or computer network. This, with the help of appropriate software, makes it possible to organize not only automated measurements with the recording of measurement results in specialized databases, but also to organize a distributed system for collecting information on microclimate parameters in places where they need constant monitoring.

The technical result is achieved due to the new technology for controlling the measurement process, the measurements themselves, primary processing of the measurement results of the microclimate parameters and their storage in non-volatile memory.

The device has the ability to simultaneously measure all microclimate parameters: temperature, humidity, air velocity, thermal load index of the medium due to the simultaneous operation of several measuring heads, each of which is additionally equipped with a radio module to provide simultaneous wireless connection to the display unit via a radio channel.

Moreover, to determine the THC index, the device contains a separate temperature sensor and has the ability to connect to each measuring head of the temperature sensor, placed in a black plastic ball.

Each measuring head is equipped with a cooler - a device for forced blowing of the temperature sensor with an ambient air flow, which allows to reduce the reaction time of the sensor to a change in external temperature, to reduce the influence of heat fluxes from the operator’s body and electronic components of the measuring head circuit, and thereby increase the expressivity and accuracy of measurement temperature

Digital processing of signals received from microclimate sensors increases the reliability of the results.

The entire process of measuring microclimate parameters is controlled inside the measuring head by its microprocessor. The ability to change the internal program of the microprocessor of the measuring head allows you to adapt it to perform various tasks of collecting, processing, saving and transmitting the results of the measurement of microclimate parameters. At the same time, each measuring head is equipped with a built-in rechargeable battery, which allows you to organize stand-alone measurements of microclimate parameters with control over the course of measurements and the transmission of their results via wireless radio channel.

An independent microprocessor, non-volatile memory and a built-in battery of the measuring head allow it to measure microclimate parameters in stand-alone mode without connecting to the display unit and without operator intervention.

Figure 1 shows a block diagram of a device for measuring microclimate parameters.

The device contains at least two measuring heads 1, 2 and an indication unit 3. It is equipped with at least one separate temperature sensor for measuring the thermal load of the medium 4, placed in a black plastic ball. A temperature sensor in a black ball can be connected to each measuring head.

Each measuring head 1, 2 contains temperature sensors 5, humidity 6, air velocity 7, a device for blowing the temperature sensor 5 - cooler 8, multi-channel analog-to-digital Converter 9, which receives signals from sensors 4, 5, 6, 7, a microprocessor 10, in which the output of the analog-to-digital converter 9 receives a digital measurement result of the sensors for further and final processing, a rechargeable battery 11, which provides power to the measuring head when connected wirelessly and automatically is charged when wired to the display unit 3 or an external power source (not shown in FIG. 1).

The device is equipped with radio modules 12 to provide simultaneous wireless connection to the display unit 3 measuring heads through the radio channel 13.

The display unit 3 contains an indicator 14 for displaying information, controls 15 for selecting an operating mode, a microprocessor 16, a non-volatile memory 17 and a power supply unit 18 that controls the entire operation of the device. The device is equipped with a charger 19, allowing to charge the batteries of the display unit.

A device for measuring microclimate parameters is used as follows.

Before starting work, radio modules 12 are connected to each measuring head 1, 2 and to the indicating unit 3 by means of radio channel 13. The measuring head is turned on using the switch on the radio module case 12. The indicator side is turned on by pressing the power supply button located on its body 18. If turning on the display unit, the status indicator of the batteries indicates a deep discharge, in which the icon of the charge indicator on the display is dark, it is necessary to turn off the device and replace the batteries. When replacing the batteries, the data in the non-volatile memory 17 is not erased, since it has been stored in it for more than 10 years. When using rechargeable batteries 11, if they are discharged, an external charger 19 is turned on. When the device is turned on, it is automatically tested. The choice of operating modes is carried out using the keyboard controls 15. The retention time of the numerical values (averaging) on the display is 2 seconds, after which the data is updated.

Record the values of the microclimate parameters measured by the sensors of the thermal load of medium 4, temperature 5, humidity 6 and air velocity 7 in the memory 17 of display unit 3 and view them by selecting the appropriate menu item according to the device instruction manual.

When working with several measuring heads on the radio channel 13, the display unit displays the serial numbers of the measuring heads with which communication is established. The increased brightness is the number of the measuring head, the microclimate parameters with which are currently displayed on the display of the display unit. Switching to displaying data from another measuring head is performed using the keys of the control unit 15 and the on-screen menu.

The current microclimate parameters displayed on the display of the display unit 3 can be fixed using the keys of the controls 15 and stored in the non-volatile memory 17 of the display unit together with the serial number of the measuring head, date and time of the measurement.

The measuring heads can be arbitrarily turned on and off during operation, while the display unit continuously scans the working measuring heads and automatically connects or disconnects them from the process of polling and processing the results.

Claims (2)

1. A device for measuring microclimate parameters, comprising a measuring head with sensors of temperature, humidity, air velocity, an analog-to-digital converter, a microprocessor, a battery and an indication unit, characterized in that the device further comprises at least one more measuring head and equipped with a separate temperature sensor for measuring the thermal load of the medium, placed in a black plastic ball, and radio modules for connecting the measuring heads to the display unit m radio channels, each measuring head further comprises a cooler for the temperature sensor airflow. 2. The device according to claim 1, characterized in that it is additionally equipped with at least one temperature sensor for measuring the thermal load of the medium.