CN221173730U - Device for detecting static characteristic of differential pressure sensor - Google Patents
Device for detecting static characteristic of differential pressure sensor Download PDFInfo
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- CN221173730U CN221173730U CN202323238183.4U CN202323238183U CN221173730U CN 221173730 U CN221173730 U CN 221173730U CN 202323238183 U CN202323238183 U CN 202323238183U CN 221173730 U CN221173730 U CN 221173730U
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- 238000002372 labelling Methods 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 235000019504 cigarettes Nutrition 0.000 description 5
- 239000000779 smoke Substances 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
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- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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- 230000006641 stabilisation Effects 0.000 description 2
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Abstract
The utility model provides a device for detecting static characteristics of a differential pressure sensor, which comprises a remote control end, suction resistance detection equipment, flow detection equipment, an electric control valve or a standard measuring head group module, an air pump, a voltmeter and an external differential pressure sensor, wherein the remote control end is connected with the suction resistance detection equipment; the built-in test head of the suction resistance detection device is used for connecting a suction resistance standard rod, and the built-in differential pressure sensor is connected to a rear end gas circuit of the test head and used for checking the working voltage and the pressure drop value of the built-in differential pressure sensor; the external differential pressure sensor is connected to the same measuring point of the internal differential pressure sensor, the input port of the flow detection device is connected to the rear end gas circuit of the test head, and the output port of the flow detection device is sequentially connected with the electric control valve/standard measuring head group module and the air pump. The device has the advantages of being capable of carrying out static characteristic analysis on the pressure difference sensor arranged in the suction resistance detection equipment and correcting the indication value of the pressure difference sensor under different flow rates.
Description
Technical Field
The utility model relates to the field of calibration of smoke resistance detection equipment in the tobacco industry, in particular to a device for detecting static characteristics of a differential pressure sensor.
Background
The suction resistance detection equipment is an important equipment for detecting the suction resistance of cigarettes, and in the production process, the suction resistance detection equipment needs to be checked and calibrated regularly, so that the operation accuracy and reliability of the suction resistance detection equipment are ensured.
Specifically, the suction resistance detection device comprises a differential pressure sensor, wherein the differential pressure sensor is used for detecting a pressure drop value of a pipeline between the built-in test head and the flow unit and outputting the pressure drop value as a detection indication value.
Therefore, after the differential pressure sensor is used for a certain period of time, a separate check is also needed, in order to study the performance of the differential pressure sensor, the static characteristic of the differential pressure sensor is usually studied, and no method or device for detecting the static characteristic of the built-in differential pressure sensor by relying on the resistance-absorption detection device exists at present.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of utility model
The utility model aims at overcoming the defects of the prior art, and provides a device for detecting the static characteristics of a differential pressure sensor, which can analyze the static characteristics of the differential pressure sensor arranged in a suction resistance detection device and correct the indication value of the differential pressure sensor under different flow rates.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the device for detecting the static characteristics of the differential pressure sensor comprises a remote control end, a suction resistance detection device, a flow detection device, an electric control valve, an air pump, a voltmeter and an external differential pressure sensor;
The built-in test head of the suction resistance detection equipment is used for connecting a suction resistance standard rod, an inlet of the suction resistance standard rod is communicated with the atmosphere, a built-in differential pressure sensor arranged in the suction resistance detection equipment is connected to a rear end gas circuit of the test head, and the built-in differential pressure sensor is also respectively connected with the voltmeter and a remote control end and used for checking working voltage and pressure drop values of the built-in differential pressure sensor;
The external differential pressure sensor is connected with the same measuring point of the internal differential pressure sensor, the input port of the flow detection device is connected to the rear end gas circuit of the test head, the output port of the flow detection device is sequentially connected with the electric control valve and the air pump, and the test head, the flow detection device, the electric control valve and the air pump form a detection gas circuit;
The remote control end is also connected with an electric control valve and an external differential pressure sensor and is used for controlling the opening degree of the electric control valve to realize different flow output and collect different pressure drop values.
The above, the electric control valve comprises a proportional valve.
The device for detecting the static characteristics of the differential pressure sensor comprises a remote control end, suction resistance detection equipment, flow detection equipment, a standard measuring head group module, an air pump, a voltmeter and an external differential pressure sensor;
The built-in test head of the suction resistance detection equipment is used for connecting a suction resistance standard rod, an inlet of the suction resistance standard rod is communicated with the atmosphere, a built-in differential pressure sensor arranged in the suction resistance detection equipment is connected to a rear end gas circuit of the test head, and the built-in differential pressure sensor is also respectively connected with the voltmeter and a remote control end and used for checking working voltage and pressure drop values of the built-in differential pressure sensor;
The external differential pressure sensor is connected with the same measuring point of the internal differential pressure sensor, the input port of the flow detection device is connected to the rear end gas circuit of the test head, the output port of the flow detection device is sequentially connected with the standard measuring head group module and the gas pump, and the test head, the flow detection device, the standard measuring head group module and the gas pump form a detection gas circuit;
The standard measuring head group module comprises a plurality of labeling side heads which are arranged in parallel, each standard measuring head is connected with an electric control valve, and each standard measuring head of the standard measuring head group module is selectively conducted through the electric control valve;
The remote control end is also connected with an electric control valve and used for controlling each standard measuring head of the standard measuring head group module to be selectively conducted through the electric control valve, and the remote control end is also connected with an external differential pressure sensor and used for collecting different pressure drop values.
The standard measuring head group module is an independent module, each standard measuring head and each electric control valve are hermetically packaged in the closed box body, and the standard measuring head group module is provided with a unified input port and an output port, and the input port and the output port are communicated with each standard measuring head and each electric control valve through a distribution gas circuit.
Compared with the prior art, the utility model has substantial characteristics and progress, and in particular has the following advantages:
1. in the first scheme, an air source is provided through an external air pump, the opening of an electric control valve is adjusted, the flow value is controlled, the flow value is read through a flow detection device, then the flow value is adjusted to be changed within a set range, after each stabilization, the numerical values of an internal pressure difference sensor and an external pressure difference sensor are read, the linearity of the pressure difference sensor is detected, the hysteresis of the pressure difference sensor is detected, and finally whether the duration of the retention time is qualified is detected by comparing the voltage, the flow value and the stability retention time of the pressure drop value.
2. In the second scheme, the function of the electric control valve is replaced by the marking measuring head group formed by the standard measuring heads, and the accuracy of the standard measuring head group is higher and accords with the standard related requirements, so that the scheme is more suitable for the current standard use scene, but the standard measuring heads are greatly influenced by environmental factors and cannot be directly installed in the suction resistance detection equipment, so that the standard measuring heads are designed into a module form, the standard measuring heads are integrated into one module, the working environment of the measuring heads is ensured to be constant, the stability of flow output is further ensured, and the problems of drift and the like of the output of the differential pressure sensor can be further studied.
Drawings
Fig. 1 is a schematic diagram of an apparatus for detecting static characteristics of a differential pressure sensor in embodiment 1 of the present utility model.
Fig. 2 is a schematic diagram of an apparatus for detecting static characteristics of a differential pressure sensor in embodiment 2 of the present utility model.
In the figure: 1. a remote control end; 2. a resistance-to-suction detection device; 3. a differential pressure sensor is arranged in the sensor; 4. an external differential pressure sensor; 5. a flow rate detection device; 6. a voltmeter; 7. an electric control valve; 8. an air pump; 9. a standard gauge head group module; 10. a standard rod for absorbing resistance; 11. and (5) a standard gauge head.
Detailed Description
The technical scheme of the utility model is further described in detail through the following specific embodiments.
Embodiment 1 is used for measuring the accuracy of key pressure sensors in cigarette smoke resistance and filter rod pressure drop detection equipment and cigarette ventilation rate detection equipment, and verifying whether the accuracy of the sensors meets the use requirement of an instrument through measurement results.
As shown in FIG. 1, the device for detecting the static characteristic of the differential pressure sensor comprises a remote control end, a suction resistance detection device, a flow detection device, an electric control valve, an air pump, a voltmeter and an external differential pressure sensor;
The built-in test head of the suction resistance detection equipment is used for connecting a suction resistance standard rod, an inlet of the suction resistance standard rod is communicated with the atmosphere, a built-in differential pressure sensor arranged in the suction resistance detection equipment is connected to a rear end gas circuit of the test head, and the built-in differential pressure sensor is also respectively connected with the voltmeter and a remote control end and used for checking working voltage and pressure drop values of the built-in differential pressure sensor;
In this embodiment, the built-in differential pressure sensor and the external differential pressure sensor are connected to the detection gas path through a four-way pipe.
The external differential pressure sensor is connected with the same measuring point of the internal differential pressure sensor, the input port of the flow detection device is connected to the rear end gas circuit of the test head, the output port of the flow detection device is sequentially connected with the electric control valve and the air pump, the electric control valve comprises a proportional valve or a pressure regulating valve, and the test head, the flow detection device, the electric control valve and the air pump form a detection gas circuit;
In this embodiment, the air pump is a flow pump.
The remote control end is also connected with an electric control valve and an external differential pressure sensor and is used for controlling the opening degree of the electric control valve to realize different flow output and collect different pressure drop values.
The detection is carried out by the following steps:
Step 1) equipment installation: respectively connecting the flow detection device, an external differential pressure sensor and a voltmeter into place in the suction resistance detection device, and connecting an electric control valve and an air pump in the external device into place and inserting a suction resistance standard rod;
step 2) detection preparation: starting an air pump and flow detection equipment to enable the detection air circuit to stably operate for a period of time;
Step 3) starting detection: the remote control end controls the flow in the detection gas circuit to change in a set range by controlling the opening of the electric control valve and the reading of the flow detection equipment, and records the numerical values of the built-in differential pressure sensor and the external differential pressure sensor after each running is stable, so as to form an output curve and detect the linearity of the differential pressure sensor;
step 4) comparing output curves after the repeated detection of the positive range and the negative range, and detecting hysteresis of the built-in differential pressure sensor;
and 5) after the voltage, the flow value and the differential pressure value are stable, starting timing by the remote control end, calculating the retention time, and checking whether the retention time is qualified or not.
The scheme is mainly used for researching the static characteristic of the differential pressure sensor, realizing correction of the indication value of the differential pressure sensor under different flow rates, and particularly, the main functional devices for realizing different flow rates comprise an electric control valve, realizing flow rate change of 17.2-17.8ml/s by changing the opening of the electric control valve, reading the indication values of the internal differential pressure sensor and the external differential pressure sensor after each stabilization, and detecting the linearity of the internal differential pressure sensor; and meanwhile, through multiple comparison experiments of the positive range and the reverse range, the output curves are compared, and the hysteresis of the differential pressure sensor is detected, so that the sensor parameters of a more comprehensive system are obtained, and a foundation is laid for data correction in the later period.
The device is used for detecting a plurality of items set in the verification procedure, so that the content of the method related to the steps is the prior art, and creative labor is not required.
Furthermore, the external differential pressure sensor and the internal differential pressure sensor are connected to the same test point, calibration can be achieved through comparison of internal and external market values, the internal differential pressure sensor is connected with a voltmeter and used for checking the output precision of the voltage and the voltage drop value of the internal differential pressure sensor, when the voltage, the flow value and the voltage drop value are stable, the remote control end starts timing, the retention time of the standard rod is calculated, and whether the duration of the retention time is qualified is checked.
Embodiment 2 is used for measuring the accuracy of key pressure sensors in cigarette smoke resistance and filter rod pressure drop detection equipment and cigarette ventilation rate detection equipment, and verifying whether the accuracy of the sensors meets the use requirement of an instrument through measurement results.
The device for detecting the static characteristics of the differential pressure sensor comprises a remote control end, suction resistance detection equipment, flow detection equipment, a standard measuring head group module, an air pump, a voltmeter and an external differential pressure sensor;
The built-in test head of the suction resistance detection equipment is used for connecting a suction resistance standard rod, an inlet of the suction resistance standard rod is communicated with the atmosphere, a built-in differential pressure sensor arranged in the suction resistance detection equipment is connected to a rear end gas circuit of the test head, and the built-in differential pressure sensor is also respectively connected with the voltmeter and a remote control end and used for checking working voltage and pressure drop values of the built-in differential pressure sensor;
In this embodiment, the built-in differential pressure sensor and the external differential pressure sensor are connected to the detection gas path through a four-way pipe.
The external differential pressure sensor is connected with the same measuring point of the internal differential pressure sensor, the input port of the flow detection device is connected to the rear end gas circuit of the test head, the output port of the flow detection device is sequentially connected with the standard measuring head group module and the gas pump, and the test head, the flow detection device, the standard measuring head group module and the gas pump form a detection gas circuit;
In this embodiment, the air pump is a flow pump.
The standard measuring head group module comprises a plurality of labeling side heads which are arranged in parallel, each standard measuring head is connected with an electric control valve, and each standard measuring head of the standard measuring head group module is selectively conducted through the electric control valve;
The remote control end is also connected with an electric control valve and used for controlling each standard measuring head of the standard measuring head group module to be selectively conducted through the electric control valve, and the remote control end is also connected with an external differential pressure sensor and used for collecting different pressure drop values.
The standard measuring head group module is an independent module, each standard measuring head and each electric control valve are hermetically packaged in the closed box body, and the standard measuring head group module is provided with a unified input port and an output port, and the input port and the output port are communicated with each standard measuring head and each electric control valve through a distribution gas circuit.
In this embodiment, the specifications of the electrically controlled valves are the same.
The detection is carried out by the following steps:
Step 1) equipment installation: respectively connecting the flow detection device, an external differential pressure sensor and a voltmeter into place in the suction resistance detection device, and connecting a standard measuring head group module and an air pump in the external device into place and inserting a suction resistance standard rod;
step 2) detection preparation: starting an air pump and flow detection equipment to enable the detection air circuit to stably operate for a period of time;
Step 3) starting detection: the remote control end controls the flow in the detection gas circuit to be switched between different standard measuring heads by controlling alternative opening of the electric control valve and reading of the flow detection equipment, and after the flow is switched to one standard measuring head and the operation is stable, the numerical values of the built-in differential pressure sensor and the external differential pressure sensor are recorded to form an output curve, and the linearity of the differential pressure sensor is detected;
step 4) comparing output curves after the repeated detection of the positive range and the negative range, and detecting hysteresis of the built-in differential pressure sensor;
and 5) after the voltage, the flow value and the differential pressure value are stable, starting timing by the remote control end, calculating the retention time, and checking whether the retention time is qualified or not.
The main difference between the embodiment and the embodiment 1 is that the electric control valve is changed into a module composed of a group of standard test heads, because the standard test heads are still calibration references under the current standard system, corresponding standards can be referred to and are easier to execute, but because remote calibration needs to be realized, the external device is integrated into a set of closed module structure, so that the module is designed into a module instead of directly loading the suction resistance detection device one by one, the interference of the external environment to the standard test heads can be prevented, and meanwhile, the conduction of different test heads can be realized through the switching of the electric control valve.
The method comprises the steps of detecting the device, wherein the steps of using the device are a plurality of items set in the verification procedure, and only the device is adopted for detection, so that the content of the method involved in the steps is the prior art, and the creative labor is not required to be paid; the difference with the traditional scheme is that the structure design level is different, and particularly, the standard measuring head module is adopted to control the gas circuit to be conducted.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (9)
1. A device for detecting static characteristics of a differential pressure sensor, characterized by: the device comprises a remote control end, a suction resistance detection device, a flow detection device, an electric control valve, an air pump, a voltmeter and an external differential pressure sensor;
The built-in test head of the suction resistance detection equipment is used for connecting a suction resistance standard rod, an inlet of the suction resistance standard rod is communicated with the atmosphere, a built-in differential pressure sensor arranged in the suction resistance detection equipment is connected to a rear end gas circuit of the test head, and the built-in differential pressure sensor is also respectively connected with the voltmeter and a remote control end and used for checking working voltage and pressure drop values of the built-in differential pressure sensor;
The external differential pressure sensor is connected with the same measuring point of the internal differential pressure sensor, the input port of the flow detection device is connected to the rear end gas circuit of the test head, the output port of the flow detection device is sequentially connected with the electric control valve and the air pump, and the test head, the flow detection device, the electric control valve and the air pump form a detection gas circuit;
The remote control end is also connected with an electric control valve and an external differential pressure sensor and is used for controlling the opening degree of the electric control valve to realize different flow output and collect different pressure drop values.
2. The apparatus for detecting static characteristics of a differential pressure sensor according to claim 1, wherein: the electrically controlled valve comprises a proportional valve.
3. The apparatus for detecting static characteristics of a differential pressure sensor according to claim 1 or 2, wherein: the air pump is a flow pump.
4. The apparatus for detecting static characteristics of a differential pressure sensor according to claim 1 or 2, wherein: the built-in differential pressure sensor and the external differential pressure sensor are communicated with the detection gas circuit through four-way pipelines.
5. A device for detecting static characteristics of a differential pressure sensor, characterized by: the device comprises a remote control end, a suction resistance detection device, a flow detection device, a standard measuring head group module, an air pump, a voltmeter and an external differential pressure sensor;
The built-in test head of the suction resistance detection equipment is used for connecting a suction resistance standard rod, an inlet of the suction resistance standard rod is communicated with the atmosphere, a built-in differential pressure sensor arranged in the suction resistance detection equipment is connected to a rear end gas circuit of the test head, and the built-in differential pressure sensor is also respectively connected with the voltmeter and a remote control end and used for checking working voltage and pressure drop values of the built-in differential pressure sensor;
The external differential pressure sensor is connected with the same measuring point of the internal differential pressure sensor, the input port of the flow detection device is connected to the rear end gas circuit of the test head, the output port of the flow detection device is sequentially connected with the standard measuring head group module and the gas pump, and the test head, the flow detection device, the standard measuring head group module and the gas pump form a detection gas circuit;
The standard measuring head group module comprises a plurality of labeling side heads which are arranged in parallel, each standard measuring head is connected with an electric control valve, and each standard measuring head of the standard measuring head group module is selectively conducted through the electric control valve;
The remote control end is also connected with an electric control valve and used for controlling each standard measuring head of the standard measuring head group module to be selectively conducted through the electric control valve, and the remote control end is also connected with an external differential pressure sensor and used for collecting different pressure drop values.
6. The apparatus for detecting static characteristics of a differential pressure sensor as set forth in claim 5, wherein: the standard measuring head group module is an independent module, each standard measuring head and each electric control valve are hermetically packaged in the closed box body, and the standard measuring head group module is provided with a unified input port and an output port, and the input port and the output port are communicated with each standard measuring head and each electric control valve through a distribution gas circuit.
7. The apparatus for detecting static characteristics of a differential pressure sensor according to claim 5 or 6, wherein: the specification of each electric control valve is the same.
8. The apparatus for detecting static characteristics of a differential pressure sensor as set forth in claim 7, wherein: the air pump is a flow pump.
9. The apparatus for detecting static characteristics of a differential pressure sensor as set forth in claim 8, wherein: the built-in differential pressure sensor and the external differential pressure sensor are communicated with the detection gas circuit through four-way pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323238183.4U CN221173730U (en) | 2023-11-29 | 2023-11-29 | Device for detecting static characteristic of differential pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323238183.4U CN221173730U (en) | 2023-11-29 | 2023-11-29 | Device for detecting static characteristic of differential pressure sensor |
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| Publication Number | Publication Date |
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| CN221173730U true CN221173730U (en) | 2024-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202323238183.4U Active CN221173730U (en) | 2023-11-29 | 2023-11-29 | Device for detecting static characteristic of differential pressure sensor |
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| CN (1) | CN221173730U (en) |
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2023
- 2023-11-29 CN CN202323238183.4U patent/CN221173730U/en active Active
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