CN201072349Y - Flux temperature detecting instrument - Google Patents
Flux temperature detecting instrument Download PDFInfo
- Publication number
- CN201072349Y CN201072349Y CNU2007200383288U CN200720038328U CN201072349Y CN 201072349 Y CN201072349 Y CN 201072349Y CN U2007200383288 U CNU2007200383288 U CN U2007200383288U CN 200720038328 U CN200720038328 U CN 200720038328U CN 201072349 Y CN201072349 Y CN 201072349Y
- Authority
- CN
- China
- Prior art keywords
- flow
- temperature
- display unit
- chip microcomputer
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A flow and temperature tester consists of a structure part and an electric part which is arranged inside the structure part. The electric part comprises a temperature transducer, a flow transducer, an SMC, a temperature display unit and a flow display unit and the temperature transducer, the flow transducer, the temperature display unit and the flow display unit are connected with the SMC. The signals of temperature and flow from the temperature transducer and the flow transducer are transmitted to the SMC and after being processed changed into data which are displayed respectively on the temperature display unit and the flow display unit. The flow transducer comprises a flow inductive resistor and a temperature inductive resistor which are respectively connected with the SMC through an AD conversion circuit and the flow inductive resistor is used for sensing water flow while the temperature inductive resistor is used for sensing reference voltage generated by water heat. The flow inductive resistor and the temperature inductive resistor are connected with two input ends of a differential amplifier circuit and the output end of the differential amplifier circuit first goes through the AD conversion circuit and then is connected with the SMC through a filter circuit. Compared with the traditional tester, the tester of the utility model is more convenient for using.
Description
Technical field
The utility model relates to a kind of fluid detection instrument, especially a kind of flow quantity temperature detector.
Background technology
In the prior art, be two independent products for the flow of fluid and the detection of temperature.Their principle of work is:
Flow sensor is used for flux monitoring system, when flow velocity reaches the flow velocity threshold values of setting, produces detection signal, is used to protect the interlock protection system.What flow sensor was commonly used is mechanical type, comprises traditional differential pressure type, float-type etc., and their mechanism is complicated heavy, and difficulty (must block piping erection) is installed, and crushing is big, low precision, and gas, liquid can not be general.Temperature sensor is used for displays temperature and produces control signal, and charactron is used for display button and sets menu state.
More than two kinds of equipment be the most frequently used in the automated system, can use this two classes sensor in the most systems simultaneously.As two separate equipment inconvenience that will inevitably bring operation, safeguard and install to the user respectively, bring system wiring complexity and integrity problem simultaneously.Commonly used flow sensor or temperature sensor, its outward appearance use all generally that structure, its profile of right cylinder or approximate rectangular parallelepiped is plain, to lack variation, moulding attractive in appearance etc. always.
Summary of the invention
Install in order to solve temperature discrete in the prior art and flow detection equipment, the problem of the inconvenience of operation, maintenance, wiring, the utility model unites two into one flow tester and temperature measuring device, possesses all functions of temperature and flow sensor simultaneously.Concrete technical scheme is:
A kind of flow quantity temperature detector is made up of structure division and electric part, and electric part is installed in the structure division.Electric part comprises temperature sensor, flow sensor, single-chip microcomputer, temperature display unit, flow display unit, and temperature sensor, flow sensor, temperature display unit, flow display unit connect single-chip microcomputer.Temperature, the flow signal of temperature sensor and flow sensor are transferred to single-chip microcomputer, and data show by temperature display unit and flow display unit respectively after treatment.Flow sensor comprises flow velocity inductive reactance and temperature sense resistance, and they are connected with single-chip microcomputer by A/D convertor circuit respectively again, and the flow velocity inductive reactance is used to respond to water flow velocity, and temperature sense resistance is used to respond to water temperature and produces reference voltage.Flow velocity inductive reactance and temperature sense resistance are connected two input ends of differential amplifier circuit, and the output terminal of differential amplifier circuit is connected single-chip microcomputer again with by filtering circuit by A/D convertor circuit.
Also have a reference potential generator, be used to offer temperature sense resistance reference voltage, one input end connects single-chip microcomputer, and another input end connects the voltage range learning device.The voltage range learning device is connected in single-chip microcomputer, is used for manually being provided with the flow rate test scope.Described differential amplifier circuit adopts differential amplifier.
Temperature sensor is provided with filtering circuit, and this circuit is connected between temperature sensor and the single-chip microcomputer.This filtering circuit adopts bandpass filter.
Temperature display unit adopts three 7 sections charactron displays temperatures; The flow display unit adopts 10 LED flows to show.
Structure division comprises main body and probe, and probe one end is connected with main part, and temperature sensor and flow sensor are installed in the other end of probe, fills heat conductor around the temperature sensor; Single-chip microcomputer, temperature display unit, flow display unit are installed in the main body.Main body is spherical, and temperature display unit, flow display unit are located on the spherical tangent plane; Described probe diameter is not more than 10mm.
Compared with prior art, the beneficial effects of the utility model are:
1, flow tester and temperature measuring device are united two into one, possess all functions of temperature and flow tester simultaneously.
2, the flow rate test result is accurate, and is influenced by ambient temperature little.
3, the user can be provided with flow measurement range.
4, probe is installed in the pipeline of a little caliber, and the complicated purity of measurement is reduced, and need not block tested pipeline.
5, main body adopts the spherical shell structure, and is elegant in appearance.
Description of drawings
Fig. 1 is the utility model theory diagram
Fig. 2 is the utility model outward appearance front elevation
Fig. 3 is the utility model exterior sideview cut-open view
Flow velocity inductive reactance 1, heater 2, temperature sense resistance 3, air chamber semiconductor 4, digital temperature IC 5, main body 6, probe 7, flow display unit 8, temperature display unit 9
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
A kind of flow quantity temperature detector is made up of structure division and electric part, and electric part is installed in the structure division.Electric part comprises temperature sensor, flow sensor, single-chip microcomputer, temperature display unit 9, flow display unit 8.Temperature sensor, flow sensor, temperature display unit 9, flow display unit 8 connect PIC single-chip microcomputer P89LPC512.The temperature and the flow signal of temperature sensor and flow sensor are transferred to single-chip microcomputer, and after single-chip microcomputer was handled, data showed by temperature display unit 9 and flow display unit 8 respectively.
As Fig. 2,3, structure division of the present utility model comprises spherical main 6 and probe 7, and probe 7 one ends are connected with main body 6, and temperature sensor and flow sensor are installed in the other end of probe 7.Single-chip microcomputer is installed in the main body 6, and temperature display unit 9, flow display unit 8 are installed on the spherical tangent plane of main bodys 6.Described probe 7 diameter 8mm.
The test mode of flow is to utilize the thermal diffusion principle.Theoretical formula: V ∝ Ksqrt (T); T ∝ R
TWherein V-rate of flow of fluid, T-temperature, R
T-thermistor causes resistance by temperature.By this formula as can be known, temperature sense resistance and flow velocity are square proportional relations, utilize this principle, two resistance (temperature sense) are arranged, with the constant voltage source power supply, by the change in voltage of benchmark inductive reactance and fluctuations in discharge resistance, handle through amplification filtering, detect flow signal.
Concrete enforcement is: flow sensor comprises that flow velocity inductive reactance 1, temperature sense resistance 3 (are used to respond to water temperature, produce reference voltage), temperature sense resistance 3 is by reference potential generator power supply, and resistance 1,3 connects the signal of two input ends, differential amplifier output of differential amplifier (using existing device) respectively through being connected with single-chip microcomputer behind the A/D change-over circuit again after bandpass filter (being made up of with low-pass filter circuit existing high-pass filtering circuit) filtering.Single-chip microcomputer P89LPC512 can produce reference potential, has the function of reference potential generator.The height of Single-chip Controlling reference potential has the function of voltage range learning device.The user can be provided with the voltage output range of reference potential device by single-chip microcomputer, and this voltage is added on the temperature sense resistance 3, and then can adjust the voltage of the input end that is connected with temperature sense resistance 3 on the differential amplifier.The voltage difference of the other end (i.e. an end that is connected with flow velocity inductive reactance 1) is exactly adjustable on this voltage and the differential amplifier so, and like this, the output of differential amplifier is just controlled.Under this principle, the scope of flow rate test is also just controlled.
Also being provided with heater 2 (can adopt ceramic heating element) and air chamber semiconductor 4 is in order to keep thermal equilibrium, be obtaining the wideer range of linearity.
Existing digital temperature sensor LM37 and high thermal conductivity coefficient heat conductive silica gel are adopted in temperature survey, and they can improve the susceptibility and the precision of thermometric.The digital temperature IC5 of sensor is located at the top of flow sensor, is full of the heat conductive silica gel of high thermal conductivity coefficient on every side, and isolates by air chamber semiconductor 4 with flow sensor.
LM37 is I
2The digital circuit of C serial mode, there is ROM its inside, reads the ROM value by single-chip microcomputer, can calculate temperature value.This temperature sensor is provided with bandpass filter.
Single-chip microcomputer P89LPC512 can distinguish corresponding flow and temperature produces the two-way pilot signal, and the multiple way of output is arranged, and is divided into by output type: 1. switching value output, NPN, PNP, relay output, 2. the analog quantity way of output: 4～20mA, 0～10V.Be divided into two-wire system and three-wire system output by the way of output.
Using method:
In the time of actual the use, only need on tested pipeline, open the aperture of a diameter 8mm, probe of the present utility model be stretched into get final product (if measured object not through pipeline transmission, only need stretch in the testee just passable) to probe.The user can be provided with the height of flow rate test by tested flow range is set.
As shown in table 1, be the utility model display menu.Wherein first classify setup menu as, second classifies the menu function note as, and the 3rd classifies parameter as is provided with scope, and the 4th classifies the note of the scope of setting as, remarks explanation menu object.Form last column is the setting of distance learning line, and its is only at learning functionality of flow, with " the high some study " in the menu " low spot study " function is identical, and purpose is to set the scope of flow rate test height.
Table 1: display menu
Method to set up, referring to Fig. 2, two buttons are arranged at the panel bottom, and left side MODE/ENTER key is menu setting and confirms function, whenever is presented on the charactron by a menu sequence.The right LEARN/SET key is a parameter setting, with cooperating the MODE/ENTER key, respective menu is carried out parameter setting (showing equally) on charactron, and parameter confirms to press once more the MODE/ENTER key.
The control of the utility model various piece and data processing are realized by the software of single-chip microcomputer, because software not at the utility model protection domain, does not explain at this.
Claims (7)
1. flow quantity temperature detector, its electric part comprises temperature sensor, flow sensor, single-chip microcomputer, temperature display unit, flow display unit, it is characterized in that temperature sensor, flow sensor, temperature display unit (9), flow display unit (8) connect single-chip microcomputer, the temperature and the flow signal of temperature sensor and flow sensor are transferred to single-chip microcomputer, and data show by temperature display unit (9) and flow display unit (8) respectively after treatment; Flow sensor comprises flow velocity inductive reactance (1) and temperature sense resistance (3), and they are connected with single-chip microcomputer by A/D convertor circuit respectively again, and flow velocity inductive reactance (1) is used to respond to water flow velocity, and temperature sense resistance (3) is used to respond to water temperature; Flow velocity inductive reactance (1) and temperature sense resistance (3) are connected two input ends of differential amplifier circuit, and the output terminal of differential amplifier circuit is connected single-chip microcomputer again with by filtering circuit by A/D convertor circuit.
2. flow quantity temperature detector according to claim 1 is characterized in that also being provided with the reference potential generator, and its input end connects single-chip microcomputer, and output terminal connects temperature sense resistance (3), is used for providing voltage to temperature sense resistance (3).
3. flow quantity temperature detector according to claim 2 is characterized in that also being provided with the voltage range learning device, and its input end connects single-chip microcomputer, and output terminal is connected with another input end of reference potential generator, is used for manually being provided with the flow rate test scope.
4. flow quantity temperature detector according to claim 1 is characterized in that temperature sensor is provided with filtering circuit, and this circuit is connected between temperature sensor and the single-chip microcomputer.
5. flow quantity temperature detector according to claim 1 is characterized in that temperature display unit (9) adopts three 7 sections charactron displays temperatures; Flow display unit (8) adopts 10 LED to show flow.
6. flow quantity temperature detector according to claim 1, it is characterized in that described detector also comprises the structure division of being made up of main body (6) and probe (7), one end of probe (7) is connected with main body (6), temperature sensor and flow sensor are installed in the other end of probe (7), fill heat conductor around the temperature sensor; Single-chip microcomputer, temperature display unit (9), flow display unit (8) are installed in the main body (6).
7. flow quantity temperature detector according to claim 6 is characterized in that described main body (6) for spherical, and temperature display unit (9), flow display unit (8) are located on the spherical tangent plane; Described probe (7) diameter is not more than 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200383288U CN201072349Y (en) | 2007-06-19 | 2007-06-19 | Flux temperature detecting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200383288U CN201072349Y (en) | 2007-06-19 | 2007-06-19 | Flux temperature detecting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201072349Y true CN201072349Y (en) | 2008-06-11 |
Family
ID=39550907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200383288U Expired - Fee Related CN201072349Y (en) | 2007-06-19 | 2007-06-19 | Flux temperature detecting instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201072349Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564630A (en) * | 2011-12-26 | 2012-07-11 | 联合汽车电子有限公司 | Measurement device for rotor temperature of automobile motor |
| WO2016197631A1 (en) * | 2015-06-08 | 2016-12-15 | 伊玛精密电子（苏州）有限公司 | Acid-base resistant all-metal flow temperature sensor |
-
2007
- 2007-06-19 CN CNU2007200383288U patent/CN201072349Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564630A (en) * | 2011-12-26 | 2012-07-11 | 联合汽车电子有限公司 | Measurement device for rotor temperature of automobile motor |
| CN102564630B (en) * | 2011-12-26 | 2014-08-06 | 联合汽车电子有限公司 | Measurement device for rotor temperature of automobile motor |
| WO2016197631A1 (en) * | 2015-06-08 | 2016-12-15 | 伊玛精密电子（苏州）有限公司 | Acid-base resistant all-metal flow temperature sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9612137B2 (en) | Instrument housing with embedded liquid crystal display within plastic layer | |
| EP2884252A2 (en) | Manifold assembly for a portable leak tester | |
| US20090122831A1 (en) | Intelligent flow/temperature measuring device | |
| CN201072349Y (en) | Flux temperature detecting instrument | |
| CN100520312C (en) | Flow quantity temperature detector | |
| CN207408021U (en) | A kind of New temperature transmitter experimental device | |
| CN213120668U (en) | Integrated differential pressure gas mass flowmeter | |
| CN204214495U (en) | A kind of Anti-explosion intelligent flow-sensint unit | |
| CN205157079U (en) | WK -01 temperature output quantity and switching value tester | |
| CN205809615U (en) | The motor speed of a kind of pump and the control device of flow measurement | |
| CN202255502U (en) | Flow sensor | |
| CN205403960U (en) | Novel temperature measurement circuit | |
| CN202582616U (en) | Integrated intelligent Verabar flow meter | |
| CN206270781U (en) | One kind is warned and with temperature-adjusting device for retaining | |
| CN103822658A (en) | Multifunctional integrated transmitter | |
| CN203432643U (en) | Monitoring alarm device of glass pipe water level gauge | |
| CN203615974U (en) | Electronic soap film flowmeter | |
| CN217901086U (en) | Pressure detection device for reaction kettle | |
| CN214333941U (en) | Novel liquid level sensor for inspection well | |
| CN219227865U (en) | Display system for realizing temperature control lamplight color function of LED lamp | |
| CN213301357U (en) | Air gauge capable of displaying air volume ratio in real time | |
| CN217405022U (en) | Measurement and control teaching platform adaptive to various industrial sensors | |
| CN110631235B (en) | Wind speed and air quantity measuring device and efficient air port with same | |
| CN212779412U (en) | Small-sized thermal gas mass flowmeter | |
| CN219935177U (en) | Novel concealed micro differential pressure transmitter |
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: 20080611 Termination date: 20130619 |