CN201993378U - Charge inductive maintenance-free wind speed measurement device - Google Patents
Charge inductive maintenance-free wind speed measurement device Download PDFInfo
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- CN201993378U CN201993378U CN2010205828148U CN201020582814U CN201993378U CN 201993378 U CN201993378 U CN 201993378U CN 2010205828148 U CN2010205828148 U CN 2010205828148U CN 201020582814 U CN201020582814 U CN 201020582814U CN 201993378 U CN201993378 U CN 201993378U
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Abstract
The utility model relates to a charge inductive maintenance-free wind speed measurement device, which comprises a pair of charge inductive sensors and a signal processing unit, wherein the sensors comprise an upstream sensor and a downstream sensor, and the upstream sensor and the downstream sensor are respectively connected to the signal processing unit through signal cables. Only solid metal exploring rods of the sensors are contacted with airflows, the flow speed is measured through medium airflows and the inductive charge of sensor probes, and a pressure lead-in pipe is not needed, so the blocking problem does not exist. The measurement device has the maintenance-free characteristic.
Description
Technical field
The present invention relates to the flow rate measuring device of a kind of device for measuring flow speed of gas, particularly dusty gas.
Background technology
Wind speed, flue gas flow rate measurement are the important parameters in the industrial automation process.Wind speed measuring device is the visual plant of industrial automation process control.Be widely used in industrial wind speed, apparatus for measuring air quantity at present, for example pitot tube, Verabar, backrest bourdon's tube, venturi, many larynxs strength, wing installation etc., all be that employing P measuring method is total head measuring tube and static pressure measurement form of tubes, with differential pressure transmitter one end connect the total head pressure nozzle, the other end connects the static pressure pressure nozzle, comes measurement flow rate by measuring differential pressure between total head and the static pressure.Because the terminal essential differential pressure transmitter pressure-sensitive that connects of pressure nozzle, pressure nozzle easily stops up, and especially very easily stops up in dust-contained airflow is measured, and maintenance is big, causes difficulty to measurement.As at wind measuring wind speed of thermal power plant, there is not solution.
Summary of the invention
In order to overcome shortcomings such as existing wind speed measuring device easily stops up, maintenance is big, the △ P measuring method of abandoning tradition of the present invention, utilize the electric charge induction technology and hand over relative theory, a kind of brand-new wind speed measuring device is provided, not only can be directly accurately measuring wind, need not to demarcate, and have never stop up, non-maintaining feature.Be particularly suitable for the measurement of dust-contained airflow flow velocity.
The technical solution adopted for the present invention to solve the technical problems is:The non-maintaining wind speed measuring device of charge inductive type comprises a pair of electric charge induction sensor and signal processing unit.Sensor is divided into upstream sensor and downstream sensor, is parallel to each other and installs perpendicular to airflow line, and sensor adopts the version of being isolated by ceramics insulator between sensor probe and the protective casing.The upstream and downstream sensor is connected to signal processing unit respectively by signal cable.According to the AC charge principle of induction, be that moving gaseouse medium is when flowing through pair of sensors, on the upstream and downstream sensor probe, respond to equivalent charge signal at random, two groups of random signals reach signal processing unit simultaneously, in signal processing unit, change into digital signal through signal condition, A/D conversion, again by flush bonding processor according to handing over high precision time difference (coal dust is through two used times of sensor) the △ t that just can obtain two signals after the relevant calculated with mathematical model; Mounting distance between the upstream and downstream sensor is that constant L(installs accurately measurement of back, is input in the signal processing unit by keyboard), utilize formula: V (m/s)=L (m) ÷ △ t (s) can calculate the absolute flow velocity of air-flow accurately.Behind the sectional area in input air channel, just can record volumetric flow rate; After inserting pulverized coal channel temperature and pressure transmitter, device just can calculate the volumetric flow rate under the status of criterion.Signal processing unit characterizes the simulating signal of flow velocity or exports to other system by fieldbus by D/A conversion becoming 4-20mA.
The invention has the beneficial effects as follows:The just true heart probe of sensor gold that contacts with air-flow, the induced charge measurement flow rate by medium air-flow and sensor probe does not need pressure guiding pipe, so there is not blockage problem, has non-maintaining feature.
Description of drawings:
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is sensor construction figure of the present invention,
6. sensor probes among the figure, 7. ceramics insulator, 8. protective casing, 9. hold-down nut, 10. electric housing, 11. connection terminals.
1. upstream sensors among the figure, 2. downstream sensor, 3. signal processing unit, 4. signal cable, 5. sensor mounting seat.
Fig. 2 is system's connection layout
Embodiment:In Fig. 2, the non-maintaining wind speed measuring device of charge inductive type is made up of upstream sensor (1), downstream sensor (2), signal processing unit (3).The upstream and downstream sensor is parallel to each other and is installed in (5) on the mounting seat perpendicular to airflow line, and distance is L between the sensor, and between 10cm-50cm, the signal of two-way sensor is sent to signal processing unit (3) by signal cable (4).The charge signal of the probe of upstream and downstream sensor (6) when induction medium flows through; because the insulating effect of ceramics insulator (7); the not protected sleeve pipe of charge signal (8) short circuit; signal can only be sent on the connection terminal of casing for electric appliances (10) (11), is sent to signal processing unit (3) by signal cable (4).According to the AC charge principle of induction, be that moving gaseouse medium is when flowing through pair of sensors, on the upstream and downstream sensor probe, respond to equivalent charge signal at random, two groups of random signals reach signal processing unit simultaneously, in signal processing unit, change into digital signal through signal condition, A/D conversion, again by flush bonding processor according to handing over high precision time difference (coal dust is through two used times of sensor) the △ t that just can obtain two signals after the relevant calculated with mathematical model; Mounting distance between the upstream and downstream sensor is that constant L(installs accurately measurement of back, is input in the signal processing unit by keyboard), utilize formula: V (m/s)=L (m) ÷ △ t (s) can calculate the absolute flow velocity of air-flow accurately.Behind the sectional area in input air channel, just can record volumetric flow rate; After inserting pulverized coal channel temperature and pressure transmitter, device just can calculate the volumetric flow rate under the status of criterion.Signal processing unit characterizes the simulating signal of flow velocity or exports to other system by fieldbus by D/A conversion becoming 4-20mA.
Claims (3)
1. the non-maintaining wind speed measuring device of charge inductive type comprises a pair of electric charge induction sensor and signal processing unit, it is characterized in that sensor is divided into upstream sensor and downstream sensor, and the upstream and downstream sensor is connected to signal processing unit respectively by signal cable.
2. by the non-maintaining wind speed measuring device of the described charge inductive type of claim 1, it is characterized in that the upstream and downstream sensor is parallel to each other and installs perpendicular to airflow line.
3. by the non-maintaining wind speed measuring device of the described charge inductive type of claim 1, it is characterized in that the electric charge induction sensor adopts the version of being isolated by ceramics insulator between sensor probe and the protective casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205828148U CN201993378U (en) | 2010-10-29 | 2010-10-29 | Charge inductive maintenance-free wind speed measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205828148U CN201993378U (en) | 2010-10-29 | 2010-10-29 | Charge inductive maintenance-free wind speed measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201993378U true CN201993378U (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205828148U Expired - Fee Related CN201993378U (en) | 2010-10-29 | 2010-10-29 | Charge inductive maintenance-free wind speed measurement device |
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| CN (1) | CN201993378U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776743A (en) * | 2013-12-24 | 2014-05-07 | 中电投河南电力有限公司技术信息中心 | Alternating current (AC) charge induction type pulverized coal fineness online monitoring method and AC charge induction type pulverized coal fineness online monitoring device |
| CN107063958A (en) * | 2017-06-13 | 2017-08-18 | 白茂森 | A kind of dust concentration on-line measurement device based on electrostatic method |
-
2010
- 2010-10-29 CN CN2010205828148U patent/CN201993378U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776743A (en) * | 2013-12-24 | 2014-05-07 | 中电投河南电力有限公司技术信息中心 | Alternating current (AC) charge induction type pulverized coal fineness online monitoring method and AC charge induction type pulverized coal fineness online monitoring device |
| CN107063958A (en) * | 2017-06-13 | 2017-08-18 | 白茂森 | A kind of dust concentration on-line measurement device based on electrostatic method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20151029 |
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| EXPY | Termination of patent right or utility model |