CN203812455U - Gas ultrasonic flowmeter practical teaching device - Google Patents
Gas ultrasonic flowmeter practical teaching device Download PDFInfo
- Publication number
- CN203812455U CN203812455U CN201420215825.0U CN201420215825U CN203812455U CN 203812455 U CN203812455 U CN 203812455U CN 201420215825 U CN201420215825 U CN 201420215825U CN 203812455 U CN203812455 U CN 203812455U
- Authority
- CN
- China
- Prior art keywords
- circuit
- flowmeter
- pin
- chip
- capacitor
- 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
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model discloses a gas ultrasonic flowmeter practical teaching device, comprising a flowmeter housing and a circuit board housing. The flowmeter housing is provided with a gas transmission channel inside. One end of the flowmeter housing is provided with a gas inlet, and the other end of the flowmeter housing is provided with a gas outlet. The gas inlet is connected with a mini air pump through an inlet air pipe and an inlet valve. The middle part of the flowmeter housing is embedded with a first ultrasonic probe and a second ultrasonic probe which are oppositely arranged. An ultrasonic emission channel circuit, an ultrasonic reception channel circuit, and an emission and reception switching circuit are integrated on the flowmeter circuit board. The emission and reception switching circuit is connected with a two-digit dial switch. The ultrasonic emission channel circuit is formed by an input interface and an ultrasonic emission drive circuit. The ultrasonic reception channel circuit is formed by a pre-amplification electric circuit, a filtering circuit, a post-amplification circuit, and an output interface. The device is low in cost, and students can master flowmeter knowledge in a deep-going manner, and experiment efficiency is improved, and practicality is good.
Description
Technical field
The utility model belongs to Practical teaching device technical field, is specifically related to a kind of Ultrasonic Wave Flowmeter Practical teaching device.
Background technology
Flowmeter experiment is the important experimental project of Experiment of College Physics and fluid mechanics experiment.Flowmeter experimental provision of the prior art, volume is larger, cost is higher, is generally arranged in special laboratory, while experiment, multiple students share an experimental provision, the experimental resources wretched insufficiency that average each student has, in a lot of situations, after having tested, some students also do not start to operate, and cause part student's manipulative ability poor; And, the flowmeter experimental provision of the prior art modes of purchasing that adopt obtain more, it is the experimental provision that integrated level is higher, when testing, student just uses, and do not participate in making, be difficult to really recognize structure and the principle of flowmeter inside, cause student not enough deeply concrete to flowmeter mastery of knowledge; In addition, flowmeter experimental provision of the prior art, the flow measurement medium using is mainly water, the time of preparing experiment is longer, and after a laboratory, also need laboratory to sweep arrangement, expended experiment a lot of time of teacher, therefore flowmeter experimental provision of the prior art is not suitable for practice-training teaching very much.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of Ultrasonic Wave Flowmeter Practical teaching device is provided, it is simple in structure, realize cost low, be convenient to student and carry out learning manipulation, can make student deeply grasp flowmeter knowledge, can improve conventional efficient, be conducive to the cultivation of College Students ' Engineering quality, practical, be convenient to promote the use of.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of Ultrasonic Wave Flowmeter Practical teaching device, it is characterized in that: comprise flowmeter shell and be arranged on flowmeter shell one end outside and for placing the circuit board housing of flowmeter electronics plate, described flowmeter shell inside is provided with the cylindrical gas transmission channel that diameter is 30mm～50mm, one end of described flowmeter shell is provided with gas access, the other end of described flowmeter shell is provided with gas vent, on described gas access, be connected with the micro air pump for generation of pressure gas by draft tube and the gas admittance valve being connected in draft tube, the middle part of described flowmeter shell embeds the first ultrasonic probe and the second ultrasonic probe that are oppositely arranged is installed, angle between angle and the second ultrasonic probe and surface level between described the first ultrasonic probe and surface level is 40 °～50 °, on described flowmeter electronics plate, be integrated with ultrasound wave transmission channel circuit and ultrasound wave receiving cable circuit, and receive commutation circuit for switching the duty of the first ultrasonic probe and the second ultrasonic probe and making one of them be operated in another transmitting that is operated in accepting state of emission state, described transmitting receives two toggle switchs that are connected to the duty for selecting the first ultrasonic probe and the second ultrasonic probe in commutation circuit, described two toggle switchs are exposed at outward on the outside surface of circuit board housing, described ultrasound wave transmission channel circuit is by joining successively and forming for input interface and the ultrasound wave transmitting driving circuit in outer signal source, described ultrasound wave receiving cable circuit is by the pre-amplification circuit joining successively, filtering circuit, rearmounted amplifying circuit and for external oscillographic output interface composition, described ultrasound wave transmitting driving circuit and pre-amplification circuit all receive commutation circuit with transmitting and join.
Above-mentioned a kind of Ultrasonic Wave Flowmeter Practical teaching device, it is characterized in that: described transmitting receives commutation circuit and is made up of chip AD7510DIJN and chip SN7404N, the 1st pin of described chip AD7510DIJN joins with the output terminal of-15V power supply, the 2nd pin ground connection of described chip AD7510DIJN, the 8th pin of described chip AD7510DIJN joins with the output terminal of+15V power supply, the 10th pin and the 11st pin of described chip AD7510DIJN all join with the first ultrasonic probe, the 14th pin and the 15th pin of described chip AD7510DIJN all join with the second ultrasonic probe, the 9th pin and the 16th pin of described chip AD7510DIJN all join with pre-amplification circuit, the 12nd pin of described chip AD7510DIJN and the 13rd pin all join with ultrasound wave transmitting driving circuit, the 3rd pin of described chip AD7510DIJN and the 1st pin of chip SN7404N join, the 5th pin of described chip AD7510DIJN and the 2nd pin of chip SN7404N all with two toggle switchs in one end of second switch join, and join by resistance R 6 and the output terminal of+5V power supply, the 4th pin of described chip AD7510DIJN and the 3rd pin of chip SN7404N join, the 6th pin of described chip AD7510DIJN and the 4th pin of chip SN7404N all with two toggle switchs in one end of the first bit switch join, and join by resistance R 5 and the output terminal of+5V power supply, the other end of the first bit switch and the equal ground connection of the other end of second switch in described two toggle switchs.
Above-mentioned a kind of Ultrasonic Wave Flowmeter Practical teaching device, is characterized in that: described ultrasound wave transmitting driving circuit is mainly made up of chip LM48560.
Above-mentioned a kind of Ultrasonic Wave Flowmeter Practical teaching device, it is characterized in that: described pre-amplification circuit is by operational amplifier U1, resistance R 1, capacitor C 1 and capacitor C 2 form, the inverting input of described operational amplifier U1 is the input end IN1 of pre-amplification circuit and joins with transmitting reception commutation circuit, one end of described resistance R 1, one end of one end of capacitor C 1 and capacitor C 2 all joins with the inverting input of operational amplifier U1, the in-phase input end ground connection of described operational amplifier U1, the output terminal of described operational amplifier U1 is the output terminal OUT1 of pre-amplification circuit and joins with the input end of filtering circuit, the other end of the other end of described resistance R 1 and capacitor C 1 all joins with the output terminal of operational amplifier U1.
Above-mentioned a kind of Ultrasonic Wave Flowmeter Practical teaching device, it is characterized in that: described filtering circuit is by operational amplifier U2, resistance R 2, resistance R 3, resistance R 4, capacitor C 3, capacitor C 4 and capacitor C 5 form, one end of described capacitor C 3 is the input end IN2 of filtering circuit and joins with the output terminal of pre-amplification circuit, one end of one end of the other end of described capacitor C 3 and resistance R 2 and capacitor C 4 joins, the other end ground connection of described resistance R 2, one end of one end of the other end of described capacitor C 4 and resistance R 3 and capacitor C 5 joins, the output terminal of the reverse input end of the other end of described resistance R 3 and operational amplifier U2 and operational amplifier U2 joins, the input end in the same way of the other end of described capacitor C 5 and operational amplifier U2 and one end of resistance R 4 join, the other end ground connection of described resistance R 4, the output terminal of described operational amplifier U2 is the output terminal OUT2 of filtering circuit and joins with the input end of rearmounted amplifying circuit.
Above-mentioned a kind of Ultrasonic Wave Flowmeter Practical teaching device, is characterized in that: described rearmounted amplifying circuit is mainly made up of operational amplifier chip AD8605.
Above-mentioned a kind of Ultrasonic Wave Flowmeter Practical teaching device, is characterized in that: the diameter of described cylindrical gas transmission channel is 40mm.
Above-mentioned a kind of Ultrasonic Wave Flowmeter Practical teaching device, is characterized in that: the angle between angle and the second ultrasonic probe and surface level between described the first ultrasonic probe and surface level is 45 °.
The utility model compared with prior art has the following advantages:
1, the utility model has been simplified the digital circuit part of finished product Ultrasonic Wave Flowmeter, adopt signal importation, outer signal source, and adopt the signal output display part of external oscillograph, the calculating section of gas flow completes by hand by student, and be recorded in laboratory report, make of the present utility model simple in structure, realize cost low, real training student can accomplish that everyone is a set of, real training resource abundance, be convenient to student and carry out learning manipulation, and operate learning is convenient and swift, can cultivate better student's manipulative ability.
2, when student uses the utility model to carry out Ultrasonic Wave Flowmeter experiment, can adopt following form: first teacher distributes the electronic devices and components loose mail of each circuit integrated on the printed circuit board of flowmeter circuit board and flowmeter electronics plate to student, and provide soldering appliance, a signal source and an oscillograph are to student, student's manual welding, after having debugged flowmeter electronics plate, be installed in circuit board housing, the first ultrasonic probe is all received to commutation circuit with transmitting with the second ultrasonic probe to be connected, and on input interface external signal source, external oscillograph on output interface, student adopts the utility model to test, not only can understand in the concrete engineering reality how specialized course's knowwhy to be applied in Ultrasonic Wave Flowmeter, can also weld exercise, circuit debugging exercise, signal source use and oscillograph uses, can participate in making Ultrasonic Wave Flowmeter, experiment content is abundant, can really recognize structure and the principle of flowmeter inside, make student deeply grasp flowmeter knowledge.
3, the flow measurement medium that the utility model uses is gas, with available technology adopting water as compared with measuring media, the time of preparing experiment can shorten greatly, and experiment cleanliness are high, after a laboratory, without arrangement is swept in laboratory, save experiment teacher's time, can improve conventional efficient.
4, Ultrasonic Wave Flowmeter because of its have accuracy high, measure wide dynamic range, without the feature of crushing, be widely used in the fields such as oil, chemical industry, metallurgy, the utility model has been introduced the engineering characteristic of Ultrasonic Wave Flowmeter in practice-training teaching, be conducive to the cultivation of College Students ' Engineering quality, contribute to student to meet as soon as possible the demand in work position.
5, of the present utility model practical, result of use is good, is convenient to promote the use of.
In sum, the utility model is simple in structure, realizes cost low, is convenient to student and carries out learning manipulation, can make student deeply grasp flowmeter knowledge, can improve conventional efficient, is conducive to the cultivation of College Students ' Engineering quality, practical, is convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the theory diagram of circuit integrated on the utility model flowmeter electronics plate.
Fig. 3 is the circuit theory diagrams that the utility model transmitting receives commutation circuit.
Fig. 4 is the circuit theory diagrams of the utility model pre-amplification circuit.
Fig. 5 is the circuit theory diagrams of the utility model filtering circuit.
Description of reference numerals:
1-flowmeter shell; 2-circuit board housing; 3-flowmeter electronics plate;
4-gas delivery passage; 5-gas access; 6-gas vent;
7-draft tube; 8-gas admittance valve; 9-micro air pump;
The 10-the first ultrasonic probe; The 11-the second ultrasonic probe;
12-ultrasound wave transmission channel circuit; 12-1-input interface;
12-2-ultrasound wave transmitting driving circuit; 13-ultrasound wave receiving cable circuit;
13-1-pre-amplification circuit; 13-2-filtering circuit; 13-3-rearmounted amplifying circuit;
13-4-output interface; 14-transmitting receives commutation circuit; 15-two toggle switchs.
Embodiment
As depicted in figs. 1 and 2, the utility model comprises flowmeter shell 1 and is arranged on flowmeter shell 1 one end outside and for placing the circuit board housing 2 of flowmeter electronics plate 3, described flowmeter shell 1 inside is provided with the cylindrical gas transmission channel 4 that diameter is 30mm～50mm, one end of described flowmeter shell 1 is provided with gas access 5, the other end of described flowmeter shell 1 is provided with gas vent 6, on described gas access 5, be connected with the micro air pump 9 for generation of pressure gas by draft tube 7 and the gas admittance valve 8 being connected in draft tube 7, the middle part of described flowmeter shell 1 embeds the first ultrasonic probe 10 and the second ultrasonic probe 11 that are oppositely arranged is installed, angle between angle and the second ultrasonic probe 11 and surface level between described the first ultrasonic probe 10 and surface level is 40 °～50 °, on described flowmeter electronics plate 3, be integrated with ultrasound wave transmission channel circuit 12 and ultrasound wave receiving cable circuit 13, and receive commutation circuit 14 for switching the duty of the first ultrasonic probe 10 and the second ultrasonic probe 11 and making one of them be operated in another transmitting that is operated in accepting state of emission state, described transmitting receives two toggle switchs 15 that are connected to the duty for selecting the first ultrasonic probe 10 and the second ultrasonic probe 11 in commutation circuit 14, outer being exposed on the outside surface of circuit board housing 2 of described two toggle switchs 15, described ultrasound wave transmission channel circuit 12 is by joining successively and forming for input interface 12-1 and the ultrasound wave transmitting driving circuit 12-2 in outer signal source, described ultrasound wave receiving cable circuit 13 is by the pre-amplification circuit 13-1 joining successively, filtering circuit 13-2, rearmounted amplifying circuit 13-3 and for external oscillographic output interface 13-4 composition, described ultrasound wave transmitting driving circuit 12-2 and pre-amplification circuit 13-1 all receive commutation circuit 14 with transmitting and join.
When concrete enforcement, described flowmeter shell 1 and circuit board housing 2 all adopt acrylic to process.
As shown in Figure 3, in the present embodiment, described transmitting receives commutation circuit 14 and is made up of chip AD7510DIJN and chip SN7404N, the 1st pin of described chip AD7510DIJN joins with the output terminal of-15V power supply, the 2nd pin ground connection of described chip AD7510DIJN, the 8th pin of described chip AD7510DIJN joins with the output terminal of+15V power supply, the 10th pin of described chip AD7510DIJN and the 11st pin all join with the first ultrasonic probe 10, the 14th pin of described chip AD7510DIJN and the 15th pin all join with the second ultrasonic probe 11, the 9th pin and the 16th pin of described chip AD7510DIJN all join with pre-amplification circuit 13-1, the 12nd pin of described chip AD7510DIJN and the 13rd pin all join with ultrasound wave transmitting driving circuit 12-2, the 3rd pin of described chip AD7510DIJN and the 1st pin of chip SN7404N join, the 5th pin of described chip AD7510DIJN and the 2nd pin of chip SN7404N all with two toggle switchs 15 in one end of second switch join, and join by resistance R 6 and the output terminal of+5V power supply, the 4th pin of described chip AD7510DIJN and the 3rd pin of chip SN7404N join, the 6th pin of described chip AD7510DIJN and the 4th pin of chip SN7404N all with two toggle switchs 15 in one end of the first bit switch join, and join by resistance R 5 and the output terminal of+5V power supply, the other end of the first bit switch and the equal ground connection of the other end of second switch in described two toggle switchs 15.
In the present embodiment, described ultrasound wave transmitting driving circuit 12-2 is mainly made up of chip LM48560.
As shown in Figure 4, in the present embodiment, described pre-amplification circuit 13-1 is by operational amplifier U1, resistance R 1, capacitor C 1 and capacitor C 2 form, the inverting input of described operational amplifier U1 is the input end IN1 of pre-amplification circuit 13-1 and joins with transmitting reception commutation circuit 14, one end of described resistance R 1, one end of one end of capacitor C 1 and capacitor C 2 all joins with the inverting input of operational amplifier U1, the in-phase input end ground connection of described operational amplifier U1, the output terminal of described operational amplifier U1 is the output terminal OUT1 of pre-amplification circuit 13-1 and joins with the input end of filtering circuit 13-2, the other end of the other end of described resistance R 1 and capacitor C 1 all joins with the output terminal of operational amplifier U1.When concrete enforcement, described operational amplifier U1 is chip AD8605.
As shown in Figure 5, in the present embodiment, described filtering circuit 13-2 is by operational amplifier U2, resistance R 2, resistance R 3, resistance R 4, capacitor C 3, capacitor C 4 and capacitor C 5 form, one end of described capacitor C 3 is the input end IN2 of filtering circuit 13-2 and joins with the output terminal of pre-amplification circuit 13-1, one end of one end of the other end of described capacitor C 3 and resistance R 2 and capacitor C 4 joins, the other end ground connection of described resistance R 2, one end of one end of the other end of described capacitor C 4 and resistance R 3 and capacitor C 5 joins, the output terminal of the reverse input end of the other end of described resistance R 3 and operational amplifier U2 and operational amplifier U2 joins, the input end in the same way of the other end of described capacitor C 5 and operational amplifier U2 and one end of resistance R 4 join, the other end ground connection of described resistance R 4, the output terminal of described operational amplifier U2 is the output terminal OUT2 of filtering circuit 13-2 and joins with the input end of rearmounted amplifying circuit 13-3.When concrete enforcement, described operational amplifier U2 is chip AD8605.
In the present embodiment, described rearmounted amplifying circuit 13-3 is mainly made up of operational amplifier chip AD8605.The diameter of described cylindrical gas transmission channel 4 is 40mm.Angle between angle and the second ultrasonic probe 11 and surface level between described the first ultrasonic probe 10 and surface level is 45 °.
The utility model can be used in the practice-training teaching of flowmeter, when student uses the utility model to carry out flowmeter experiment, first teacher distributes the electronic devices and components loose mail of each circuit integrated on the printed circuit board of flowmeter circuit board and flowmeter electronics plate to student, and provide soldering appliance, a signal source and an oscillograph are to student, student's manual welding, after having debugged flowmeter electronics plate, be installed in circuit board housing 2, the first ultrasonic probe 10 is all received to commutation circuit 14 with transmitting with the second ultrasonic probe 11 to be connected, and on input interface 12-1 external signal source, external oscillograph on output interface 13-4, then open micro air pump 9, micro air pump 9 starts output squeezing gas, forms stable test flow field, and model engineering on-the-spot test environment just can start gas flow measurement, by the aperture of manual adjustments gas admittance valve 8, and size that can adjusting gas flow.
Concrete gas flow measurement process is: first, it is 0 that the first bit switch in two toggle switchs 15 is dialled, and the second switch in two toggle switchs 15 is dialled is 1, now, receive the effect of commutation circuit 14 through transmitting, making the first ultrasonic probe 10 is transmitting probe, the second ultrasonic probe 11 is receiving transducer, operate described signal source, make the burst signal of described signal source output 200KHz, burst signal is transferred to ultrasound wave transmitting driving circuit 12-2 via input interface 12-1, ultrasound wave transmitting driving circuit 12-2 carries out power amplification rear drive the first ultrasonic probe 10 to burst signal and launches ultrasonic signal, the second ultrasonic probe 11 receives the ultrasonic signal that the first ultrasonic probe 10 launches and export to filtering circuit 13-2 after pre-amplification circuit 13-1 amplifies, filtering circuit 13-2 will export to rearmounted amplifying circuit 13-3 after the interference noise filtering in signal, after rearmounted amplifying circuit 13-3 carries out secondary amplification to signal, warp is exported to oscillograph by output interface 13-4, mistiming T1 the record of the ultrasonic signal that the ultrasonic signal of launching by oscilloscope measurement the first ultrasonic probe 10 and the second ultrasonic probe 11 receive, then, it is 1 that the first bit switch in two toggle switchs 15 is dialled, and the second switch in two toggle switchs 15 is dialled is 0, now, receive the effect of commutation circuit 14 through transmitting, making the second ultrasonic probe 11 is transmitting probe, the first ultrasonic probe 10 is receiving transducer, operate described signal source, make the burst signal of described signal source output 200KHz, burst signal is transferred to ultrasound wave transmitting driving circuit 12-2 via input interface 12-1, ultrasound wave transmitting driving circuit 12-2 carries out power amplification rear drive the second ultrasonic probe 11 to burst signal and launches ultrasonic signal, the first ultrasonic probe 10 receives the ultrasonic signal that the second ultrasonic probe 11 launches and export to filtering circuit 13-2 after pre-amplification circuit 13-1 amplifies, filtering circuit 13-2 will export to rearmounted amplifying circuit 13-3 after the interference noise filtering in signal, after rearmounted amplifying circuit 13-3 carries out secondary amplification to signal, warp is exported to oscillograph by output interface 13-4, mistiming T2 the record of the ultrasonic signal that the ultrasonic signal of launching by oscilloscope measurement the second ultrasonic probe 11 and the first ultrasonic probe 10 receive, completed Ultrasonic Wave Flowmeter experiment, after experiment, student can be according to mistiming T1 and the mistiming T2 of record, in laboratory report, calculate gas flow analysis result according to the flow rate calculation formula of transit time ultrasonic flow meters, reach the object of studying ultrasonic flow meter in depth.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification of above embodiment being done according to the utility model technical spirit, change and equivalent structure change, and all still belong in the protection domain of technical solutions of the utility model.
Claims (8)
1. a Ultrasonic Wave Flowmeter Practical teaching device, it is characterized in that: comprise flowmeter shell (1) and be arranged on flowmeter shell (1) one end outside and for placing the circuit board housing (2) of flowmeter electronics plate (3), described flowmeter shell (1) inside is provided with the cylindrical gas transmission channel (4) that diameter is 30mm～50mm, one end of described flowmeter shell (1) is provided with gas access (5), the other end of described flowmeter shell (1) is provided with gas vent (6), described gas access (5) is upper is connected with the micro air pump (9) for generation of pressure gas by draft tube (7) and the gas admittance valve (8) that is connected in draft tube (7), the middle part of described flowmeter shell (1) embeds the first ultrasonic probe (10) and the second ultrasonic probe (11) that are oppositely arranged is installed, angle between angle between described the first ultrasonic probe (10) and surface level and the second ultrasonic probe (11) and surface level is 40 °～50 °, on described flowmeter electronics plate (3), be integrated with ultrasound wave transmission channel circuit (12) and ultrasound wave receiving cable circuit (13), and receive commutation circuit (14) for switching the duty of the first ultrasonic probe (10) and the second ultrasonic probe (11) and making one of them be operated in another transmitting that is operated in accepting state of emission state, described transmitting receives two toggle switchs (15) that are connected to the duty for selecting the first ultrasonic probe (10) and the second ultrasonic probe (11) in commutation circuit (14), described two toggle switchs (15) are outer to be exposed on the outside surface of circuit board housing (2), described ultrasound wave transmission channel circuit (12) is by joining successively and forming for input interface (12-1) and the ultrasound wave transmitting driving circuit (12-2) in outer signal source, described ultrasound wave receiving cable circuit (13) is by the pre-amplification circuit joining successively (13-1), filtering circuit (13-2), rearmounted amplifying circuit (13-3) and forming for external oscillographic output interface (13-4), described ultrasound wave transmitting driving circuit (12-2) and pre-amplification circuit (13-1) all receive commutation circuit (14) with transmitting and join.
2. according to a kind of Ultrasonic Wave Flowmeter Practical teaching device claimed in claim 1, it is characterized in that: described transmitting receives commutation circuit (14) and is made up of chip AD7510DIJN and chip SN7404N, the 1st pin of described chip AD7510DIJN joins with the output terminal of-15V power supply, the 2nd pin ground connection of described chip AD7510DIJN, the 8th pin of described chip AD7510DIJN joins with the output terminal of+15V power supply, the 10th pin of described chip AD7510DIJN and the 11st pin all join with the first ultrasonic probe (10), the 14th pin of described chip AD7510DIJN and the 15th pin all join with the second ultrasonic probe (11), the 9th pin of described chip AD7510DIJN and the 16th pin all join with pre-amplification circuit (13-1), the 12nd pin of described chip AD7510DIJN and the 13rd pin all join with ultrasound wave transmitting driving circuit (12-2), the 3rd pin of described chip AD7510DIJN and the 1st pin of chip SN7404N join, the 5th pin of described chip AD7510DIJN and the 2nd pin of chip SN7404N all join with one end of the middle second switch of two toggle switchs (15), and join by resistance R 6 and the output terminal of+5V power supply, the 4th pin of described chip AD7510DIJN and the 3rd pin of chip SN7404N join, the 6th pin of described chip AD7510DIJN and the 4th pin of chip SN7404N all with two toggle switchs (15) in one end of the first bit switch join, and join by resistance R 5 and the output terminal of+5V power supply, the equal ground connection of the other end of the other end of the first bit switch and second switch in described two toggle switchs (15).
3. according to a kind of Ultrasonic Wave Flowmeter Practical teaching device claimed in claim 1, it is characterized in that: described ultrasound wave transmitting driving circuit (12-2) is mainly made up of chip LM48560.
4. according to a kind of Ultrasonic Wave Flowmeter Practical teaching device claimed in claim 1, it is characterized in that: described pre-amplification circuit (13-1) is by operational amplifier U1, resistance R 1, capacitor C 1 and capacitor C 2 form, the inverting input of described operational amplifier U1 is the input end IN1 of pre-amplification circuit (13-1) and joins with transmitting reception commutation circuit (14), one end of described resistance R 1, one end of one end of capacitor C 1 and capacitor C 2 all joins with the inverting input of operational amplifier U1, the in-phase input end ground connection of described operational amplifier U1, the output terminal of described operational amplifier U1 is the output terminal OUT1 of pre-amplification circuit (13-1) and joins with the input end of filtering circuit (13-2), the other end of the other end of described resistance R 1 and capacitor C 1 all joins with the output terminal of operational amplifier U1.
5. according to a kind of Ultrasonic Wave Flowmeter Practical teaching device claimed in claim 1, it is characterized in that: described filtering circuit (13-2) is by operational amplifier U2, resistance R 2, resistance R 3, resistance R 4, capacitor C 3, capacitor C 4 and capacitor C 5 form, one end of described capacitor C 3 is the input end IN2 of filtering circuit (13-2) and joins with the output terminal of pre-amplification circuit (13-1), one end of one end of the other end of described capacitor C 3 and resistance R 2 and capacitor C 4 joins, the other end ground connection of described resistance R 2, one end of one end of the other end of described capacitor C 4 and resistance R 3 and capacitor C 5 joins, the output terminal of the reverse input end of the other end of described resistance R 3 and operational amplifier U2 and operational amplifier U2 joins, the input end in the same way of the other end of described capacitor C 5 and operational amplifier U2 and one end of resistance R 4 join, the other end ground connection of described resistance R 4, the output terminal of described operational amplifier U2 is the output terminal OUT2 of filtering circuit (13-2) and joins with the input end of rearmounted amplifying circuit (13-3).
6. according to a kind of Ultrasonic Wave Flowmeter Practical teaching device claimed in claim 1, it is characterized in that: described rearmounted amplifying circuit (13-3) is mainly made up of operational amplifier chip AD8605.
7. according to a kind of Ultrasonic Wave Flowmeter Practical teaching device claimed in claim 1, it is characterized in that: the diameter of described cylindrical gas transmission channel (4) is 40mm.
8. according to a kind of Ultrasonic Wave Flowmeter Practical teaching device claimed in claim 1, it is characterized in that: the angle between the angle between described the first ultrasonic probe (10) and surface level and the second ultrasonic probe (11) and surface level is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215825.0U CN203812455U (en) | 2014-04-29 | 2014-04-29 | Gas ultrasonic flowmeter practical teaching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215825.0U CN203812455U (en) | 2014-04-29 | 2014-04-29 | Gas ultrasonic flowmeter practical teaching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203812455U true CN203812455U (en) | 2014-09-03 |
Family
ID=51451180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420215825.0U Expired - Fee Related CN203812455U (en) | 2014-04-29 | 2014-04-29 | Gas ultrasonic flowmeter practical teaching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203812455U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542766A (en) * | 2019-08-22 | 2019-12-06 | 中国船舶重工集团公司第七0七研究所九江分部 | processing circuit suitable for acoustic Doppler measures velocity of flow |
-
2014
- 2014-04-29 CN CN201420215825.0U patent/CN203812455U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542766A (en) * | 2019-08-22 | 2019-12-06 | 中国船舶重工集团公司第七0七研究所九江分部 | processing circuit suitable for acoustic Doppler measures velocity of flow |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205037931U (en) | High accuracy ultrasonic wave gas flowmeter | |
| CN105115553A (en) | High-accuracy ultrasonic gas flow meter based on time-difference method | |
| CN203812455U (en) | Gas ultrasonic flowmeter practical teaching device | |
| CN104005977A (en) | General fan operation parameter integration measuring method | |
| CN204168256U (en) | For the signal amplification circuit of flow quantity detecting system | |
| CN104535140A (en) | Resonant frequency testing method for energy converter of ultrasonic flowmeter | |
| CN103712652A (en) | Multi-physical field measuring method and device based on acoustic sensing technology | |
| CN103162751B (en) | Ultrasonic flowmeter | |
| CN204085486U (en) | A kind of corrosive pipeline monitoring device based on array piezoelectric film sensor | |
| CN207798941U (en) | A kind of long-range amplitude versus frequency characte measuring device based on STM32 | |
| CN202229790U (en) | Single track correlation method ultrasonic gas flow meter | |
| CN205748623U (en) | Microbubble generation electrode and device and the measurement apparatus of bubble resonance frequency | |
| CN204359406U (en) | The resonance frequency test macro of ultrasonic flowmeter transducer | |
| CN203838933U (en) | Analog signal acquisition device practical training teaching device | |
| CN203812445U (en) | Experiment teaching device for coal-bed gas well liquid level measurement | |
| CN209590128U (en) | The bionical circuit of neuron and signal frequency detection system | |
| CN203425806U (en) | Tubular reactor experimental equipment | |
| CN203588540U (en) | Vehicle-borne radar speed measurement experiment device of urban mass transit | |
| CN103115939A (en) | Simple testing device for heat transfer process between hard material and fluid | |
| CN203414556U (en) | Multifunctional low-voltage line measuring instrument | |
| CN206400900U (en) | A kind of physics floating force tests equipment special | |
| CN202974355U (en) | Ultrasonic flow measurement device | |
| CN207752677U (en) | A kind of waveform generates and translation circuit experimental provision | |
| CN201407036Y (en) | Acoustic variable density logger | |
| CN206177530U (en) | Experimental key parameter wireless remote measurement acquisition and analysis device of turbo generator gas leak -tightness |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140903 Termination date: 20150429 |
|
| EXPY | Termination of patent right or utility model |