CN202793961U - Experiment device for measuring density of object - Google Patents
Experiment device for measuring density of object Download PDFInfo
- Publication number
- CN202793961U CN202793961U CN 201220470991 CN201220470991U CN202793961U CN 202793961 U CN202793961 U CN 202793961U CN 201220470991 CN201220470991 CN 201220470991 CN 201220470991 U CN201220470991 U CN 201220470991U CN 202793961 U CN202793961 U CN 202793961U
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- float
- lifting table
- sensor
- converter
- measuring
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Abstract
The utility model provides an experiment device for measuring the density of an object. The experiment device consists of a silicon-piezoresistive force sensor, a float, a water containing cup, a bracket, a lifting table, a signal amplifier, an A/D (Analog to Digital) converter and a computer; a weight serves as an auxiliary measuring device; and the silicon-piezoresistive force sensor is fixed on the bracket, the float is hung on a hanging hook connected to the lower end of the sensor, the lifting table is arranged at the bottom of the bracket, the water containing cup is placed on the lifting table, the float hung below the sensor is immerged into water in the water containing cup, and an amplification, signal conversion and real-time monitoring system formed by connecting the signal amplifier, the A/D converter and the computer is connected with the silicon-piezoresistive force sensor. The high-accuracy weight is adopted to calibrate the sensitivity of a force measuring system, so that the accuracy of the measuring system in force measurement is improved; and the measured output quantity is an electrical quantity, so that the computer online monitoring is realized, and non-electrical quantity measurement of micro-tension is also realized.
Description
Technical field
The utility model discloses a kind of experimental provision of measuring object density, belongs to the physics facility technical field.
Background technology
In Experiment of College Physics, the experiments of measuring of object density is a very important experiment, and traditional experimental provision comprises: physical balance, Weight box, object under test, cotton rope, beaker, water, pycnometer, thermometer.Adopt " pycnometer method " and " hydrostatic claims the weighing apparatus method " all to need to measure with physical balance the quality of object in the experiment, but in the process of regulating balance, the not ideal enough of adjusting if inaccurate, scale bad, that transfer zero point that level is transferred weigh, the capital affects stability, sensitivity, correctness and the indicating value unchangeability of balance, will inevitably bring error to the result.
Summary of the invention
The utility model proposes a kind of experimental provision of measuring object density, provided simultaneously the new method that object density is measured in the variation that utilizes the electrical quantities parameter, this principle of device is simple, and is easy and simple to handle, improved the precision of measuring.
The experimental provision that the utility model is measured object density is comprised of following part: be made of Si-resistance-strain gauge, float, water cup, support, lifting table, signal amplifier, A/D converter and computing machine, counterweight is the subsidiary device; Si-resistance-strain gauge is fixed on the support, the suspension hook that the lower end of sensor connects is hung float, lifting table is arranged at the bottom of support, be placed with water cup on the lifting table, the float hung under the sensor immerses in the water of water cup, and amplification, signal conversion and real-time monitoring system that signal amplifier and A/D converter and computing machine connect and compose are connected with Si-resistance-strain gauge.
Good effect of the present utility model is: adopted the counterweight calibration dynamometric system sensitivity of high precision, improved the accuracy that measuring system is measured power, because the output quantity of measuring is electrical quantities, realize the on-line monitoring of computing machine again, also realized the non-electricity measure of little pulling force.
Description of drawings
Fig. 1 is the utility model structure principle chart;
Among the figure, 1, Si-resistance-strain gauge; 2, float; 3, water tumbler; 4, support; 5, lifting table; 6, signal amplifier; 7, A/D converter and computing machine.
Embodiment
According to shown in Figure 1, Si-resistance-strain gauge 1 is fixed on the support 4, the suspension hook that the lower end of sensor 1 connects can be hung float 2 or object under test, lifting table 5 is arranged at the bottom of support 4, be placed with the water tumbler 3 that is filled with water on the lifting table 5, the object under test that sensor is hung for 1 time or float 2 immerses in the water of water tumblers 3, and amplification, signal conversion and real-time monitoring system that signal amplifier 6 and A/D converter and computing machine 7 connect and compose are connected with Si-resistance-strain gauge 1.Sensor output voltage U when the dynamometer made from Si-resistance-strain gauge 1 and counterweight is first measured pulling force and is f obtains the sensitivity B of dynamometer by U=Bmg through least square fitting, obtains the gravity acceleration g of location, utilizes
With
Obtain the density of solid
And fluid density
Claims (1)
1. experimental provision of measuring object density, it is characterized in that: be made of Si-resistance-strain gauge, float, water cup, support, lifting table, signal amplifier, A/D converter and computing machine, counterweight is the subsidiary device; Si-resistance-strain gauge is fixed on the support, the suspension hook that the lower end of sensor connects is hung float, lifting table is arranged at the bottom of support, be placed with water cup on the lifting table, the float hung under the sensor immerses in the water of water cup, and amplification, signal conversion and real-time monitoring system that signal amplifier and A/D converter and computing machine connect and compose are connected with Si-resistance-strain gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220470991 CN202793961U (en) | 2012-09-17 | 2012-09-17 | Experiment device for measuring density of object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220470991 CN202793961U (en) | 2012-09-17 | 2012-09-17 | Experiment device for measuring density of object |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202793961U true CN202793961U (en) | 2013-03-13 |
Family
ID=47821205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220470991 Expired - Fee Related CN202793961U (en) | 2012-09-17 | 2012-09-17 | Experiment device for measuring density of object |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202793961U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487159A (en) * | 2020-05-22 | 2020-08-04 | 安徽师范大学 | Density measuring device based on communication technology of Internet of things |
-
2012
- 2012-09-17 CN CN 201220470991 patent/CN202793961U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487159A (en) * | 2020-05-22 | 2020-08-04 | 安徽师范大学 | Density measuring device based on communication technology of Internet of things |
| CN111487159B (en) * | 2020-05-22 | 2020-12-25 | 安徽师范大学 | Density measuring device based on communication technology of Internet of things |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130917 |