CN206146777U - Laboratory Moisture Meter - Google Patents

Abstract

The utility model discloses a moisture measuring instrument for a laboratory, which is characterized in that it comprises an electric control box, a microwave drying box, an electronic balance, a mechanical transmission mechanism, a microcomputer control panel, a liquid crystal display, and a micro-printer; the microwave drying box A microwave generator and an infrared heating tube are installed inside, and both the microwave generator and the infrared heating tube are connected to the microcomputer control board. There is a rotating tray that can place multiple sample dishes in the microwave drying box, and the rotating tray is connected to the mechanical transmission mechanism. , the mechanical transmission mechanism is located in the electric control box, the mechanical transmission mechanism is driven by a motor, the motor is connected to the microcomputer control board, the electronic balance is connected to the rotating tray through a support rod, and the microcomputer control board communicates with the microcomputer control board through the RS‑232 standard serial port Electronic balance communication connection. The utility model takes a single-chip microcomputer as the core, integrates functions such as measurement, display and printing, and has a high degree of automation.

Description

Laboratory Moisture Meter

technical field

The utility model relates to an experimental equipment, in particular to a moisture measuring instrument for a laboratory.

Background technique

The moisture analyzer is a commonly used experimental equipment, through which the moisture in various materials can be analyzed. The current moisture analyzer generally uses infrared drying or electric heating to dry, and the quality change is measured by a balance after drying, so that Determination of the moisture content in it, but this operation process is complicated, and automatic measurement cannot be realized. At present, there are some moisture analyzers that use microwave heating, but this kind of analyzer is used for biological experiments, because the microwave will destroy the cell structure. Subsequent experiments will have an impact, and the current microwave moisture analyzer has a low degree of automation and cannot realize automatic measurement and output.

Utility model content

Aiming at the defects of the prior art, the utility model provides a laboratory moisture analyzer.

A laboratory moisture analyzer, comprising an electric control box 1, a microwave drying box 2, an electronic balance 7, a mechanical transmission mechanism 4, a microcomputer control panel 11, a liquid crystal display 13, and a micro-printer 9; A microwave generator 12 and an infrared heating tube 16 are provided, and the microwave generator 12 and the infrared heating tube 16 are all connected to the microcomputer control board 11. There is a rotary tray 8 that can place a plurality of sample dishes 5 in the microwave drying box 2, and the The rotating tray 8 is connected to the mechanical transmission mechanism 4, and the mechanical transmission mechanism 4 is located in the electric control box 1. The mechanical transmission mechanism 4 is driven by a motor, and the motor is connected to the microcomputer control board 11. The electronic balance 7 is connected to the The rotary tray 8 is connected, and the microcomputer control board 11 communicates with the electronic balance 7 through the RS-232 standard serial port. Described microcomputer control board 11 is made up of single-chip microcomputer and its display, control, driving circuit.

The beneficial effects of the utility model are: taking the single-chip microcomputer as the core, integrating the functions of measurement, display and printing, etc., with a high degree of automation, two different drying modes of microwave drying and infrared drying can be adopted according to the experimental requirements.

Description of drawings

Fig. 1 is the structural representation of the moisture measuring instrument of the present utility model;

Figure 2 is a schematic circuit diagram of the moisture analyzer.

In the figure, 1—electric control box, 2—microwave drying oven, 3—power switch, 4—mechanical transmission mechanism, 5—sample dish, 6—weighing pole, 7—electronic balance, 8—rotary tray, 9 A micro-printer, 10-operating keyboard, 11-microcomputer control panel, 12-microwave generator, 13-LCD display, 14-working status indicator light, 15-door lock switch, 16-infrared heating tube.

detailed description

In order to make the above-mentioned purposes, features and advantages of the present utility model more obvious and easy to understand, the specific implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings, so that the above-mentioned and other purposes, features and advantages of the present utility model will be clearer . Like reference numerals designate like parts throughout the drawings. The drawings are not intentionally drawn to scale, and the emphasis is on illustrating the gist of the present invention.

As shown in Figures 1 and 2, the laboratory moisture analyzer of the present invention is mainly composed of an electric control box 1, a microwave oven 2, an electronic balance 7, a mechanical transmission mechanism 4, a microcomputer control panel 11, a liquid crystal display 13, and a micro-printer 9 and other parts. The microwave drying box 2 has built-in two heating devices, a microwave generator 12 and an infrared heating tube 16. Both the microwave generator 12 and the infrared heating tube 16 are connected to the microcomputer control board 11, and different heating methods and drying methods can be used according to the test requirements. power to dry samples quickly. Inside the drying box 2 there is a rotating tray 8 on which a plurality of sample dishes 5 can be placed. The mechanical transmission mechanism 4 is located in the electric control box 1. The mechanical transmission mechanism 4 is driven by a motor, and the motor is connected to the microcomputer control board 11. The mechanical transmission mechanism 4 can realize the horizontal rotation and lifting movement of the rotating tray 8 under the control of the microcomputer, so that each sample The test conditions are the same, and the samples are heated evenly. Before drying and after drying, the electronic balance 7 automatically weighs. Well, store and record the container quality of the sample at each position, and the sample quality before and after drying.

The microcomputer control panel 11 is the intelligent control core of the moisture meter, and it is made up of a single-chip microcomputer and its display, control and drive circuits. Its functions are: control microwave drying or infrared drying, and adjust and control the drying power; control the mechanical transmission mechanism 4 to complete the rotation and lifting of the rotary tray, communicate with the electronic balance 7 through the RS-232 standard serial port, and control the electronic balance to return to zero automatically and automatically Weighing; analysis, calculation and display of moisture value; judgment of drying end point; recording, processing and calculation of weighing data; completion of moisture measurement results, display and printing. If computer control is used, a set of measurement and control software and communication cables are provided to realize computer-controlled measurement, data management, report printing, etc. One computer can control multiple moisture analyzers.

FIG. 2 is an electrical schematic diagram of the microcomputer control board 11 . Microprocessor adopts single-chip microcomputer. Including clock circuit, liquid crystal display circuit, microwave generator, infrared heating tube, motor control drive circuit, communication control and interface circuit. Surrounded by various input and output sockets. The electronic balance used by the moisture analyzer should be regularly calibrated in accordance with the relevant national regulations.

During operation, the instrument should be installed on a horizontal cement table or other non-vibrating working table with a gap of more than 15cm between the wall or other objects, and the instrument must be reliably grounded. Open the front panel of the electric control box 1 at the lower part of the instrument, put the balance weighing pan into the bracket in the middle of the balance (note that the metal tapered column of the weighing pan should be gently placed in the control hole in the center of the balance), and put the weighing The support rod is inserted into the upper center hole of the weighing pan through the shielding hole between the drying box 2 and the balance. Adjust the 4 bottom corners under the instrument, and observe the level indicator mark on the electronic balance at the same time, so that the level indicator mark on the electronic balance is in the center. Check each part inside the instrument, and after making sure it is correct, close the front panel, insert the power plug at the back of the instrument into the power socket, and then turn on the power. Connect your computer with a monitor, printer, mouse, keyboard, etc. Connect one end of the communication cable to the computer and the other end to the instrument, fix it with screws, and turn on the power. Turn on the moisture analyzer first, then turn on the power of the computer, and after normal startup, install the application program of the moisture analyzer correctly. Run the moisture determination program. Put the sample into the sample dish 5, and complete weighing-drying-weighing in sequence according to the procedure, so as to complete the moisture determination.

In the above description, many specific details are set forth in order to fully understand the utility model. However, the above description is only a preferred embodiment of the utility model, and the utility model can be implemented in many other ways different from those described here, so the utility model is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the methods and technical content disclosed above to make many possible changes and modifications to the technical solution of the present utility model without departing from the scope of the technical solution of the utility model, or modify it into an equivalent change, etc. effective example. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention, which do not deviate from the technical solution of the present utility model, still belong to the scope of protection of the technical solution of the present utility model.

Claims (2)

1. a laboratory moisture meter, is characterized in that, comprises electric control box (1), microwave oven (2), electronic balance (7), mechanical transmission mechanism (4), microcomputer control panel (11), Liquid crystal display (13) and micro-printer (9); Microwave generator (12) and infrared heating tube (16) are provided with in described microwave oven (2), microwave generator (12) and infrared heating tube (16) ) are all connected to the microcomputer control panel (11), and there is a rotary tray (8) that can place a plurality of sample dishes (5) in the microwave drying box (2), and the rotary tray (8) is connected with the mechanical transmission mechanism (4) connected, the mechanical transmission mechanism (4) is located in the electric control box (1), the mechanical transmission mechanism (4) is driven by a motor, and the motor is connected to the microcomputer control board (11), and the electronic balance (7) is connected to the The rotary tray (8) is connected, and the microcomputer control board (11) is communicated with the electronic balance (7) through the RS-232 standard serial port. 2. The moisture measuring instrument according to claim 1, characterized in that, the microcomputer control board (11) is made up of a single-chip microcomputer and display, control and drive circuits thereof.