CN204044018U - A kind of manoscopy device - Google Patents

Abstract

The utility model discloses a gas density measuring device. The measuring device comprises a cylinder body, a temperature sensor group, a pressure sensor group, a microprocessor and a touch display. The temperature sensor group and the pressure sensor group are respectively arranged in the cylinder body. One end of the device is respectively connected with the temperature sensor group and the pressure sensor group, and the other end is connected with the touch monitor, which is set on the outer wall of the cylinder; the measuring device also includes a metal plate set on the inner wall of the cylinder for detecting the volume change of the cylinder after gas storage. The strain gauge, the metal strain gauge signal amplification circuit connected to the metal strain gauge at one end, and the first analog-to-digital converter connected to the other end of the metal strain gauge signal amplification circuit, the first analog-to-digital converter is connected to the microprocessor. The measuring device has high reliability, strong stability, easy operation and greatly improved measuring accuracy.

Description

A gas density measuring device

technical field

The utility model relates to a measuring device, in particular to a gas density measuring device. the

Background technique

In the prior art, there are various methods of gas measurement, each with its own advantages, but there are often problems of low measurement accuracy and many consumables, and the measurement results of the same sample by different equipment and instruments are very different. the

Utility model content

The technical problem to be solved by the utility model is to provide a gas density measuring device with high reliability, strong stability, easy operation and greatly improved measurement accuracy for the above-mentioned defects of the prior art. the

The technical solution adopted by the utility model to solve the technical problem is: to construct a gas density measuring device, which includes a cylinder body, a temperature sensor group, a pressure sensor group, a microprocessor, a touch display, the temperature sensor group and the pressure sensor group. The sensor groups are respectively arranged in the cylinder, one end of the microprocessor is respectively connected with the temperature sensor group and the pressure sensor group, and the other end is connected with the touch display, and the display is arranged on the outer wall of the cylinder;

The measuring device also includes a metal strain gauge arranged on the inner wall of the cylinder for detecting the volume change of the cylinder body after gas storage, a metal strain gauge signal amplification circuit connected to the metal strain gauge at one end, and a signal amplification circuit connected with the metal strain gauge. The other end of the circuit is connected to the first analog-to-digital converter, and the first analog-to-digital converter is connected to the microprocessor.

In the gas density measuring device described in the utility model, a pressure signal amplifying circuit and a second analog-to-digital converter are also arranged between the pressure sensor group and the microprocessor, and one end of the pressure signal amplifying circuit is connected to the pressure sensor group The other end is connected to the second analog-to-digital converter, one end of the second analog-to-digital converter is connected to the pressure signal amplifying circuit, and the other end is connected to the microprocessor. the

In the gas density measuring device described in the present invention, a temperature signal amplifying circuit and a third analog-to-digital converter are also arranged between the temperature sensor group and the microprocessor, and one end of the temperature signal amplifying circuit is connected to the temperature sensor group The other end is connected to the third analog-to-digital converter, one end of the third analog-to-digital converter is connected to the temperature signal amplifying circuit, and the other end is connected to the microprocessor. the

In the gas density measuring device described in the utility model, the measuring device is further provided with a USB data transmission interface connected with the microprocessor. the

In the gas density measuring device described in the utility model, the measuring device is provided with a power supply, and a circuit breaker is provided between the power supply and the measuring device. the

In the gas density measuring device described in the utility model, the measuring device includes an air inlet, and the air inlet is a double switch of a solenoid valve and a manual valve. the

In the gas density measuring device described in the utility model, the measuring device includes an exhaust port, and the exhaust port is a mechanical valve. the

In the gas density measuring device described in the utility model, wheels are arranged at the bottom of the measuring device. the

In the gas density measuring device described in the utility model, the electromagnetic valve is connected with the microprocessor. the

In the gas density measuring device described in the utility model, the measuring device further includes an alarm, and the alarm is connected with the microprocessor. the

Implementing the gas density measuring device of the utility model has the following beneficial effects: the measuring device has high reliability, strong stability, easy operation and greatly improved measurement accuracy. The measurement pressure range and accuracy are improved, which provides convenience for researchers to measure work under a large pressure range, and has convenient and fast data processing functions, which provides convenience for scientific research and analysis. the

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a schematic structural view of the gas density measuring device of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings. the

As shown in Figure 1, in the first embodiment of the gas density measuring device of the present utility model, the measuring device includes a cylinder, a temperature sensor group 9, a pressure sensor group 5, a microprocessor 1, a touch display 13, the temperature sensor Group 9 and pressure sensor group 5 are arranged in this cylinder body respectively, and one end of this microprocessor 1 is connected with this temperature sensor group 9, pressure sensor group 5 respectively, and the other end is connected with this touch display 13, and this display is arranged in this cylinder. External wall;

Wherein, in other embodiments, the cylinder body may also be other forms of gas storage devices.

The measuring device also includes a metal strain gauge 2 arranged on the inner wall of the cylinder for detecting the volume change of the cylinder body after gas storage, a metal strain gauge signal amplification circuit 3 connected to the metal strain gauge 2 at one end, and a metal strain gauge connected to the metal strain gauge 2. A first analog-to-digital converter 4 connected to the other end of the on-chip signal amplifying circuit 3 , the first analog-to-digital converter 4 is connected to the microprocessor 1 . the

The utility model uses the metal strain gauge 2 to measure the slight deformation of the volume of the gas storage device after gas storage, so as to further judge the system measurement error, so as to ensure the validity of the system measurement data. the

In this embodiment, a pressure signal amplifying circuit 6 and a second analog-to-digital converter 7 are also provided between the pressure sensor group 5 and the microprocessor 1, and one end of the pressure signal amplifying circuit 6 is connected to the pressure sensor group 5 , the other end is connected to the second analog-to-digital converter 7 , one end of the second analog-to-digital converter 7 is connected to the pressure signal amplifying circuit 6 , and the other end is connected to the microprocessor 1 . the

A temperature signal amplifying circuit 10 and a third analog-to-digital converter 11 are also arranged between the temperature sensor group 9 and the microprocessor 1. One end of the temperature signal amplifying circuit 10 is connected to the temperature sensor group 9, and the other end is connected to the first Three analog-to-digital converters 11 are connected, one end of the third analog-to-digital converter 11 is connected to the temperature signal amplifying circuit 10 , and the other end is connected to the microprocessor 1 . the

Further, in order to facilitate data transmission, the measuring device is also provided with a USB data transmission interface 12 connected to the microprocessor 1 . the

Further, the measuring device is provided with a power supply, and a circuit breaker is provided between the power supply and the measuring device. the

The measuring device includes an air inlet, which is a double switch of the solenoid valve 8 and the manual valve. The solenoid valve 8 is connected with the microprocessor 1 . the

The measuring device includes an exhaust port, which is a mechanical valve. the

Further, in order to facilitate the handling of the measuring device, wheels are provided at the bottom of the measuring device. the

Further, in order to facilitate real-time detection and remind the user to pay attention to the air pressure in the cylinder to prevent accidents, the measuring device also includes an alarm 14 connected to the microprocessor 1 . the

Specifically, the volume of the cylinder is V1, and gas is delivered into the cylinder through the air inlet until the pressure sensor group 5 in the cylinder detects the gas pressure and feeds back the gas pressure to the microprocessor 1 in real time until the gas pressure reaches a predetermined value P , the microprocessor 1 controls the solenoid valve 8 to close, and stops continuing to inflate the cylinder body. At this time, the temperature sensor group 9 detects that the gas temperature in the cylinder body is T, and feeds back to the microprocessor 1 . Microprocessor 1 according to the equation set in advance: Calculate the gas density. Among them, P is the pressure of the gas; a is the phenomenological parameter to measure the gravitational force between molecules; b is the volume contained in a single molecule; V is the average space occupied by each molecule (that is, the volume of the gas divided by the total number of molecules); R is the Boltzmann constant; T is the absolute temperature, and the parameter c is described as a function of pressure .

The metal strain gauge 2 is used to measure the subtle deformation of the volume of the gas storage device after gas storage, which effectively reflects the influence of different pressure, temperature and other conditions on the measurement results, accurately reflects the range of measurement errors, and reduces gas research. uncertainties in the process. And it is used to further judge the system measurement error to ensure the validity of the system measurement data. Through the above data processing algorithm. Measure the amount n (moles) of the gas substance, calculate the gas density or other related parameters according to the measured gas moles, use the embedded system to collect and process the data in real time, display the measured data and transmit the data Give the computer further scientific analysis and processing. Finally, the automatic measurement of gas density is realized. It overcomes the shortcomings of traditional instruments, which rely entirely on manual visual inspection to read the scale of the instrument dial, slow measurement speed and large error. The measurement accuracy is greatly improved, and the generation of large errors is avoided. the

The measuring device of the utility model has high reliability, strong stability, simple operation and greatly improved measuring precision. The measurement pressure range and accuracy are improved, which provides convenience for researchers to measure work under a large pressure range, and has convenient and fast data processing functions, which provides convenience for scientific research and analysis. the

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way. the

Claims (10)

1. a manoscopy device, it is characterized in that, described measurement mechanism comprises cylinder body, sets of temperature sensors, pressure transducer group, microprocessor, touch display, described sets of temperature sensors and pressure transducer group are arranged in described cylinder body respectively, described microprocessor one end is connected with described sets of temperature sensors, pressure transducer group respectively, the other end is connected with described touch display, and described display is arranged at described outer wall of cylinder block face; Described measurement mechanism also comprise be arranged at described inboard wall of cylinder block for the first analog to digital converter detecting the metal strain plate of gas storage rear-bank rotor housing volume change, metal strain plate signal amplification circuit that one end is connected with described metal strain plate and be connected with the described metal strain plate signal amplification circuit other end, described first analog to digital converter is connected with microprocessor.

2. manoscopy device according to claim 1, it is characterized in that, pressure signal amplifying circuit and the second analog to digital converter is also provided with between described pressure transducer group and described microprocessor, described pressure signal amplifying circuit one end is connected with described pressure transducer group, the other end is connected with described second analog to digital converter, described second analog to digital converter one end is connected with described pressure signal amplifying circuit, and the other end is connected with described microprocessor.

3. manoscopy device according to claim 1, it is characterized in that, temperature signal amplifying circuit and the 3rd analog to digital converter is also provided with between described sets of temperature sensors and described microprocessor, described temperature signal amplifying circuit one end is connected with described sets of temperature sensors, the other end is connected with described 3rd analog to digital converter, described 3rd analog to digital converter one end is connected with described temperature signal amplifying circuit, and the other end is connected with described microprocessor.

4. manoscopy device according to claim 1, is characterized in that, described measurement mechanism is also provided with the USB data transmission interface be connected with described microprocessor.

5. manoscopy device according to claim 1, is characterized in that, described measurement mechanism is provided with power supply, is provided with connecting and disconnecting of the circuit protector between described power supply and described measurement mechanism.

6. manoscopy device according to claim 1, is characterized in that, described measurement mechanism comprises air intake opening, and described air intake opening is solenoid valve and hand valve dual-switch.

7. manoscopy device according to claim 1, is characterized in that, described measurement mechanism comprises exhausr port, and described exhausr port is mechanical valve.

8. manoscopy device according to claim 1, is characterized in that, is provided with wheel bottom described measurement mechanism.

9. manoscopy device according to claim 6, is characterized in that, described solenoid valve is connected with described microprocessor.

10. manoscopy device according to claim 1, is characterized in that, described measurement mechanism also comprises alarm, and described alarm is connected with described microprocessor.