CN201569477U - Small measuring vessel automatic measurement calibration device - Google Patents

Abstract

The utility model provides a small measuring vessel automatic measurement calibration device, which comprises a constant temperature cabinet, a displacement transducer, an automatic liquid filler, a digital camera measuring unit, a fluid container, an electronic scale and a computer, wherein all the electronic scale, the digital camera measuring unit, the automatic liquid filler and the fluid container are fixed on a beam; the suction of the automatic liquid filler extends into the fluid container; and all the digital camera measuring unit, the automatic liquid filler and the displacement transducer are connected with the computer. The utility model leads the small measuring vessel to be calibrated under constant temperature state, can realize batch calibration of the small measuring vessel, reaching 200 pieces per day, greatly improves the calibration efficiency, also can effectively avoid human error, and improves the calibration precision of the measuring vessel.

Description

Small volume automatic measurement and verification device

technical field

The utility model relates to an automatic metering verification device for a small measuring device, which belongs to the technical field of metering verification.

Background technique

For glass measuring instruments commonly used in laboratories, such as single-line volumetric flasks, measuring cylinders, measuring cups, etc., regular verification should be carried out to ensure the accuracy of various small measuring instruments. At present, the verification of this kind of experimental equipment, especially the measurement verification of small measuring instruments, is still limited to manual operation. Repeated experiments on various measuring instruments are used to judge whether the scale distribution of measuring instruments is uniform and accurate. Whether the total capacity is within the error range. This manual verification method takes a long time and the amount of sample processing is small. According to statistics, the number of verifications is generally about 20-30 pieces per day.

Contents of the invention

The utility model aims at the problems of low efficiency and poor precision existing in the existing manual verification method for small measuring instruments, and provides an automatic measuring and verifying device for small measuring instruments with high verification efficiency and high precision.

The automatic metering and verification device for small measuring devices of the utility model adopts the following technical solutions:

The automatic measurement and verification device for a small amount of equipment includes a constant temperature box, a displacement sensor, an automatic liquid feeder, a digital photographic measuring device, a liquid storage container, an electronic scale and a computer, an electronic scale, a digital photographic measurement device, an automatic liquid feeder, a displacement Both the sensor and the liquid storage container are set in the constant temperature box, the automatic liquid feeder and the displacement sensor are located above the electronic scale, the displacement sensor is set on the fixed beam of the automatic liquid feeder, and the suction port of the automatic liquid feeder extends into the liquid storage container Inside, electronic scales, digital photo measuring devices, automatic liquid adders and displacement sensors are all connected to the computer.

During the verification, keep the temperature in the incubator constant at 20°C, let it stand for 10 minutes before using it, and ensure that the ambient temperature required by the testing instrument and the water temperature in the liquid storage container are kept at 20°C. Place the small scale to be identified on the electronic scale. The digital photographic measuring device takes pictures of the small gauge to analyze the uniformity of the scale of the small gauge, and at the same time measures the height of the small gauge at different scale positions, and inputs the height information into the computer, and the computer automatically calculates these positions The volume of liquid added at the place, and control the automatic liquid feeder to add liquid to the small volume container. The displacement sensor measures the height of the liquid level, and when the height of liquid addition meets the requirements (reaching the height at different scales provided by the digital photo measuring device), the liquid addition is stopped. The computer runs a statistical program to compare the actual volume of the small gauge with the corresponding standard volume at each scale position, and then judge whether the small gauge is qualified.

The utility model makes the verification of the small measuring device under the constant temperature state, can realize the batch verification of the small measuring device, and the verification quantity is more than 200 per day, which greatly improves the verification efficiency, and can also effectively avoid human error and improve the accuracy of the small measuring device. test accuracy.

Description of drawings

Fig. 1 is a structural representation of the utility model.

In the figure: 1. Constant temperature box, 2. Displacement sensor, 3. Automatic liquid feeder, 4. Digital photographic measuring device, 5. Liquid storage container, 6. Bracket, 7. Electronic scale, 8. Small measuring device, 9 , computer, 10, beam.

Detailed ways

As shown in accompanying drawing 1, the automatic metering and verification device for small measuring devices of the present utility model is mainly composed of a constant temperature box 1, a displacement sensor 2, an automatic liquid feeder 3, a digital photographic measuring device 4, a liquid storage container 5, an electronic scale 7 and The computer 9 is composed. The electronic scale 7 is placed in the incubator 1 , and the digital photo measuring device 4 , the automatic liquid feeder 3 and the liquid storage container 5 are arranged on the bracket 6 in the incubator 1 . A crossbeam 10 is arranged on the support 6, and the automatic liquid filler 3 is fixed on the crossbeam 10. The electronic scale 7, the digital photo measuring device 4, the automatic liquid feeder 3 and the displacement sensor 2 are all connected with the computer 9. The suction port of the automatic liquid feeder 3 stretches in the liquid storage container 5 . The displacement sensor 2 is used to measure the height of the liquid level in the small measuring device 8, and the displacement sensor 2 is arranged on the crossbeam 10 of the fixed automatic liquid feeder 3, and is close to the nozzle of the automatic liquid feeder 3, and the nozzle of the automatic liquid feeder 3 is also fixed on the beam. The liquid required by the automatic liquid feeder 3 is contained in the liquid storage container 5, which is generally distilled water. Electronic scale 7 is used for weighing the liquid weight in small measuring device 8.

The incubator 1 is used to ensure that the ambient temperature required by the detection instrument and the water temperature in the liquid storage container 5 are kept at 20°C. The heating and temperature control device in the incubator 1 is the same as the structure of the existing incubator, and the constant temperature of 20° C. is maintained in the incubator 1 by the temperature control device.

The digital photographic measuring device 4 adopts the existing digital photographing technology to take pictures of the small measuring device 8 to analyze the uniformity of the scale on the small measuring device 8, and the computer 9 can also judge the small measuring device 8 according to the uniformity of the scale. If the scale is not uniform, it is directly judged that the small measuring device 8 is unqualified; if the scale is uniform, it can enter the liquid addition program, that is to say, the uniform scale is one of the conditions for the small measuring device 8 to be qualified. Simultaneously measure the height of the micrometer 8 at three different scale positions (2/10 scale, 5/10 scale and full scale), and input this height information into the computer 9, and the computer 9 automatically calculates the liquid addition at these positions Volume, and control the automatic liquid feeder 3 to add liquid to the small volume container 8.

The automatic liquid feeder 3 fills liquid into the small volume container 8 according to the instructions transmitted by the computer 9, and the displacement sensor 2 measures the height of the liquid level in the small volume container 8 at the same time. When the height requirements at different scales are reached, stop adding liquid. Automatic liquid feeder 3 adopts prior art.

The computer 9 is stored with a measurement standard database, and the computer 9 operates a statistical program, and calculates the small amount according to the liquid level displacement in the small volume 8 measured by the electronic scale 7 and the liquid level displacement in the small volume 8 measured by the displacement sensor 2. The actual volume of the gauge 8 at each scale position. Comparing the actual volume of the small measuring device 8 at different scale positions with the corresponding standard volume in the standard database, and then judging whether the small measuring device 8 is qualified.

Claims (1)

1. device automatic gauge calibrating installation in a small amount, comprise constant temperature oven, displacement transducer, automatic liquid adding device, the numeral measurement mechanism of taking pictures, liquid storage container, electronic scale and computing machine, it is characterized in that: electronic scale, the numeral measurement mechanism of taking pictures, automatic liquid adding device, displacement transducer and liquid storage container all are arranged in the constant temperature oven, automatic liquid adding device and displacement transducer are positioned at the top of electronic scale, displacement transducer is arranged on the fixed cross beam of automatic liquid adding device, the suction inlet of automatic liquid adding device stretches in the liquid storage container, electronic scale, the numeral measurement mechanism of taking pictures, automatic liquid adding device all is connected with computing machine with displacement transducer.

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