CN205262553U - Liquid ultrasonic flowmeter's detecting system - Google Patents
Liquid ultrasonic flowmeter's detecting system Download PDFInfo
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- CN205262553U CN205262553U CN201520336812.3U CN201520336812U CN205262553U CN 205262553 U CN205262553 U CN 205262553U CN 201520336812 U CN201520336812 U CN 201520336812U CN 205262553 U CN205262553 U CN 205262553U
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Abstract
The utility model provides a liquid ultrasonic flowmeter's detecting system, include: judge the device, judge the device with on -the -spot array able to programme electricity is connected, judges and receives whether sinusoidal wave envelope signal's frequency and amplitude are lighter than the predetermined threshold value that triggers to with the judged result send to digital signal processor, the digital signal processor electricity is connected the voltage driving circuit is worked as sinusoidal wave envelope signal's amplitude and frequency, its arbitrary one is lighter than predeterminedly when triggering the threshold value, sends the adjustment instruction, until the amplitude with the frequency all is not less than and triggers the threshold value, then judges the pipeline is the air traffic control. Through judging that the pipeline be the air traffic control or liquid ultrasonic flowmeter is the malfunction, not only solved the unsafe problem of fluidflowmeter measurement, simultaneously, improved its measuring flow's efficiency.
Description
Technical field
The utility model relates to ultrasonic flowmeter, is particularly a kind ofly applicable to the detection system that pipeline nominal diameter is greater than 100 liquid ultrasonic flowmeter.
Background technology
Liquid ultrasonic flowmeter generally adopts time difference method to measure rate of flow of fluid, and general principle is to measure the time difference of ultrasonic pulse in suitable journey flow direction and flyback flow direction to react flow velocity, thereby measures fluid flow in pipeline. The transducer drive frequency of liquid ultrasonic flowmeter is 1MHz, far away higher than the driving frequency (200KHz) of gas, is more conducive to the waveform of collection, and measured value is more accurate.
But, existing liquid ultrasonic flowmeter, when fluid flow in measuring channel, the fluid flow value of measuring is inaccurate. Trace it to its cause and be: in the time using normal frequency transmitting transducer to drive in liquid ultrasonic flowmeter, uncertain described pipeline is blank pipe, and because decay in blank pipe is larger, the sinusoidal wave envelope signal distortion that causes receiving transducer to receive is serious, finally, the fluid flow value of measuring is inaccurate.
Utility model content
The shortcoming of prior art in view of the above, the purpose of this utility model is to provide a kind of detection system of liquid ultrasonic flowmeter, be used for solving prior art fluid flowmeter in the time of measuring channel flow velocity, cannot judge the whether whether problem of fault of blank pipe and described transducer of described pipeline.
For achieving the above object and other relevant objects, the utility model provides a kind of detection system of liquid ultrasonic flowmeter, this detection system electrical connection liquid ultrasonic flowmeter, whether be blank pipe in order to the pipeline that detects described liquid ultrasonic flowmeter measurement, wherein said liquid ultrasonic flowmeter comprises digital signal processor, field programmable gate array and Voltag driving circuit, and described detection system at least comprises:
Judgment means, described judgment means is electrically connected with described field programmable gate array, judges whether frequency and the amplitude of the sinusoidal wave envelope signal receiving is less than default activation threshold value, and judged result is sent to described digital signal processor;
Described digital signal processor is electrically connected described Voltag driving circuit, when amplitude and the frequency of described sinusoidal wave envelope signal, its any one while being less than default activation threshold value, send and adjust instruction, until described amplitude and described frequency are all not less than activation threshold value, judge that described pipeline is as blank pipe.
Preferably, described Voltag driving circuit comprises high-voltage driving circuit and low-voltage driving circuit, and wherein said low-voltage driving circuit is electrically connected described digital signal processor, is applicable to receive low-voltage driving signal, 8 to 15V voltage driving is provided, and offset of sinusoidal ripple signal amplifies; Described high-voltage driving circuit is electrically connected described digital signal processor, is applicable to receive high-voltage driven signal, and 50 to 65V voltage driving is provided, and offset of sinusoidal ripple signal amplifies.
Preferably, described detection system also comprises:
Digital to analog converter, the input of described digital to analog converter is electrically connected described Voltag driving circuit input, is applicable to according to described sine wave parameter, and output meets the sine wave signal of sine wave parameter;
Transmitting transducer, the output of described Voltag driving circuit is electrically connected described transmitting transducer, is applicable to the sine wave signal of amplification to carry out electroacoustic conversion, generates ultrasonic pulse signal, and sends described ultrasonic pulse signal;
Receiving transducer, is applicable to obtain the ultrasonic pulse signal of transmitting transducer in described liquid ultrasonic flowmeter, and the ultrasonic pulse signal of reception is carried out to acoustic-electric conversion, obtains the signal of telecommunication;
Analog-digital converter, the output of described receiving transducer is electrically connected the input of described analog-digital converter, is applicable to the described signal of telecommunication to carry out analog-to-digital conversion, obtains described sinusoidal wave envelope signal, and wherein, described sinusoidal wave envelope signal comprises its amplitude and frequency.
Preferably, described digital signal processor, is also applicable to, in the time that the amplitude of described sinusoidal wave envelope signal and frequency are all not less than default activation threshold value, keep transmitting transducer driving voltage in described liquid ultrasonic flowmeter.
Preferably, described judgment means electrical connection digital signal processor, is applicable to when the driving voltage that increases described transmitting transducer, and described amplitude and described frequency are while being less than activation threshold value, judge described transducer fault.
Preferably, also comprise: warning device, described digital signal processor is electrically connected described warning device, is applicable to receive the alarm command that described digital signal processor sends, alarm sounds.
Preferably, described digital signal processor, was also suitable for according to the time difference between ultrasonic pulse signal and the ultrasonic pulse signal of reception of transmitting, calculated the flow of liquid in described pipeline.
As mentioned above, the detection system of liquid ultrasonic flowmeter of the present utility model, has following beneficial effect:
By gathering the sinusoidal wave envelope signal of receiving transducer in described pipeline, described judgment means judges whether the amplitude of described sinusoidal wave envelope signal and frequency are less than default activation threshold value, when amplitude and the frequency of described sinusoidal wave envelope signal, its any one while being less than default activation threshold value, increase the driving voltage of transmitting transducer in described liquid ultrasonic flowmeter, until described amplitude and described frequency are all not less than activation threshold value, judge that described pipeline is as blank pipe; Solve existing liquid ultrasonic flowmeter in the time of measuring channel flow, cannot judge that pipeline is the problem of blank pipe; When increasing the driving voltage of transmitting transducer, not only improve liquid ultrasonic flowmeter accuracy of measurement. When increasing the driving voltage of described transmitting transducer, until driving voltage is while increasing to maximum, and described amplitude and described frequency are while being less than activation threshold value, judge described transducer fault, can also locate described liquid ultrasonic flowmeter transducer fault, easy to use.
Brief description of the drawings
Fig. 1 is shown as the utility model embodiment a kind of liquid ultrasonic flowmeter theory structure block diagram is provided;
Fig. 2 is shown as the detection system block diagram of a kind of liquid ultrasonic flowmeter that the utility model embodiment provides;
Fig. 3 is shown as low-voltage driving circuit, the high-voltage driving circuit structure chart in Fig. 2 that the utility model embodiment provides.
Element numbers explanation:
1, digital signal processor, 2, field programmable gate array, 3, DA converter, 4, low-voltage driving circuit, 5, high-voltage driving circuit, 6, transmitting transducer, 7, receiving transducer, 8, AD converter, 9, judgment means, 10, warning device.
Detailed description of the invention
By specific instantiation, embodiment of the present utility model is described below, those skilled in the art can understand other advantages of the present utility model and effect easily by the disclosed content of this description. The utility model can also be implemented or be applied by other different detailed description of the invention, and the every details in this description also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present utility model.
Refer to Fig. 1 to Fig. 3. It should be noted that, the diagram providing in the present embodiment only illustrates basic conception of the present utility model in a schematic way, satisfy and only show with assembly relevant in the utility model in graphic but not component count, shape and size drafting while implementing according to reality, when its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
As shown in Figure 1, a kind of liquid ultrasonic flowmeter theory structure block diagram providing for the utility model embodiment, in the present embodiment, transducer 1 is as sending ultrasonic pulse signal, transducer 2 is as receiving ultrasonic pulse signal, the time differing between its transmitting and reception is t1, transducer 2 is as sending ultrasonic pulse signal, transducer 1 is as receiving ultrasonic pulse signal, the time differing between its transmitting and reception is t2, the difference of t1 and t2 is Δ t, itself and pipeline inner fluid speed relation:
In formula (1), c is the speed of ultrasonic wave in fluid, and D is pipe diameter, and θ is two ultrasonic transducers and pipe level angular separation. From formula (1), when ultrasonic wave is when in stationary gas, spread speed can be thought constant, rate of flow of fluid is directly proportional to time difference Δ t, measures Δ t and can obtain flow velocity, thereby calculate the flow velocity of fluid from pipeline.
Particularly, described liquid ultrasonic flowmeter need to be arranged on pipeline to the flow velocity of fluid in ability measuring channel.
As shown in Figure 2, the detection system block diagram of a kind of liquid ultrasonic flowmeter providing for the utility model embodiment, this detection system electrical connection liquid ultrasonic flowmeter, whether be blank pipe in order to the pipeline that detects described liquid ultrasonic flowmeter measurement, wherein said liquid ultrasonic flowmeter comprises digital signal processor 1, field programmable gate array 2 and Voltag driving circuit, and described detection system at least comprises:
Judgment means 9, described judgment means 9 is electrically connected with described field programmable gate array 2, judges whether frequency and the amplitude of the sinusoidal wave envelope signal receiving is less than default activation threshold value, and judged result is sent to described digital signal processor 1;
Described digital signal processor 1 is electrically connected described Voltag driving circuit, when amplitude and the frequency of described sinusoidal wave envelope signal, its any one while being less than default activation threshold value, send and adjust instruction, until described amplitude and described frequency are all not less than activation threshold value, judge that described pipeline is as blank pipe.
Wherein, described judgment means 9 compares according to the amplitude of described sinusoidal wave envelope signal and frequency and default activation threshold value, judge whether described amplitude and frequency are less than default activation threshold value, judged result is sent to described digital signal processor, described digital signal processor is by being transformed to high drive from low-voltage driving, under high drive, increase in described driving voltage process, judge that whether described pipeline is whether fault of the transmitting transducer 6 of blank pipe, described liquid ultrasonic flowmeter or receiving transducer 7; Wherein, in described default activation threshold value, amplitude voltage is preferably 30mv, and described calibration is set to 1MHZ; In addition, described activation threshold value becomes negative correlation with transducer power, described activation threshold value and pipe diameter become positive correlation.
In the present embodiment, the judged result receiving when described digital signal processor 1 is: when amplitude and the frequency of described sinusoidal wave envelope signal, its any one while being less than default activation threshold value, send and adjust instruction, increase the driving voltage of described transmitting transducer 6, wherein, described amplitude is less than 30mv, when described frequency is less than 1MHZ, increase the driving voltage of described transmitting transducer, described sine wave signal is processed, while adjusting described driving voltage to maximum, in the process of increase driving voltage, described judgment means 9 is by repeatedly judging described amplitude and described frequency, when the amplitude having occurred when described sinusoidal wave envelope signal is not less than 30mv or described frequency and is not less than 1MHZ, finally, judge that described pipeline is as blank pipe.
In the present embodiment, the judged result receiving when described digital signal processor 1 is: when amplitude and the frequency of described sinusoidal wave envelope signal, its any one while being all less than default activation threshold value, described digital signal processor 1 does not need to adjust the voltage of Voltag driving circuit, keeps transmitting transducer 6 driving voltages in described liquid ultrasonic flowmeter.
Wherein, described judgment means can be comparator, budget amplifier or judgment means set is arrived to digital signal processor, and other can realize the device that threshold condition is judged.
Particularly, described Voltag driving circuit comprises high-voltage driving circuit 5 and low-voltage driving circuit 4, and wherein said low-voltage driving circuit 4 is electrically connected described digital signal processor 1, is applicable to receive low-voltage driving signal, 8 to 15V voltage driving is provided, and offset of sinusoidal ripple signal amplifies; Described high-voltage driving circuit 5 is electrically connected described digital signal processor 1, is applicable to receive high-voltage driven signal, and 50 to 65V voltage driving is provided, and offset of sinusoidal ripple signal amplifies.
Preferably, described liquid ultrasonic flowmeter detection system also comprises:
Digital to analog converter, i.e. DA converter 3, the input of described digital to analog converter is electrically connected described Voltag driving circuit input, is applicable to according to described sine wave parameter, and output meets the sine wave signal of sine wave parameter;
Transmitting transducer 6, the output of described Voltag driving circuit is electrically connected described transmitting transducer 6, is applicable to the sine wave signal of amplification to carry out electroacoustic conversion, generates ultrasonic pulse signal, and sends described ultrasonic pulse signal;
Receiving transducer 7, is applicable to obtain the ultrasonic pulse signal of transmitting transducer 6 in described liquid ultrasonic flowmeter, and the ultrasonic pulse signal of reception is carried out to acoustic-electric conversion, obtains the signal of telecommunication;
Analog-digital converter, i.e. AD converter 8, the output of described receiving transducer 7 is electrically connected the input of described analog-digital converter, be applicable to the described signal of telecommunication to carry out analog-to-digital conversion, obtain described sinusoidal wave envelope signal, wherein, described sinusoidal wave envelope signal comprises its amplitude and frequency.
Preferably, described judgment means 9 is electrically connected digital signal processor 1, be applicable to when increasing the driving voltage of described transmitting transducer 6, and described amplitude and described frequency is while being less than activation threshold value, judge described transducer fault.
In the present embodiment, the frequency of described sinusoidal wave envelope signal and amplitude are all normal, all can meet the default activation threshold value of described liquid ultrasonic flowmeter, represent that described pipeline is for blank pipe and described liquid ultrasonic flowmeter are normal and fault-free.
Preferably, also comprise: warning device 10, described digital signal processor 1 is electrically connected described warning device 10, is applicable to receive the alarm command that described digital signal processor 1 sends, alarm sounds.
Particularly, increase the driving voltage of transmitting transducer 6 in described liquid ultrasonic flowmeter, until described driving voltage is greater than while increasing to its maximum, and when the amplitude of described sinusoidal wave envelope signal and frequency are less than default activation threshold value, judge the damage of described transducer, and send alarm signal, control warning device 10 and sound, to remind operating personnel.
Wherein, warning device can be different alarm device, and described alarm device comprises that buzzer, flashing lamp and other can remind operating personnel's warning device. For example, alarm device adopts stand by lamp, when occurring that transducer damages, sends red light, when alarm device is while being normal, not shinny.
In the present embodiment, when frequency and the amplitude of the sinusoidal wave envelope signal in described receiving transducer 7 are less than preset value, or do not receive sinusoidal wave envelope signal, increase the driving voltage of transmitting transducer 6 in described liquid ultrasonic flowmeter, until described driving voltage is while arriving its maximum, be that the ultrasonic pulse signal driving voltage that sends of described transmitting transducer 6 is when maximum, and when the amplitude of described sinusoidal wave envelope signal and frequency are less than default activation threshold value, judge the damage of described receiving transducer 7, and send alarm signal, controlling warning device 10 sounds.
Preferably, described digital signal processor 1, was also suitable for according to the time difference between ultrasonic pulse signal and the ultrasonic pulse signal of reception of transmitting, calculated the flow of liquid in described pipeline.
Preferably, described liquid ultrasonic flowmeter detection system also comprises:
According to the time difference between ultrasonic pulse signal and the ultrasonic pulse signal of reception of transmitting, calculate the flow of liquid in described pipeline.
Wherein, in the time of the flow of measuring channel fluid (gas or liquid) or flow velocity, by start liquid ultrasonic flowmeter, Obtaining Accurate is launched the time difference between ultrasonic pulse signal and the ultrasonic pulse signal of reception, calculates the flow of liquid in described pipeline.
Wherein, described digital signal processor 1 is the TMS320F28355 of TI company, as communicating by letter between controller and FPGA (field programmable gate array 2).
Workflow:
In the present embodiment, when described digital signal processor 1 sends test instruction, in the time that described field programmable gate array 2 receives this test instruction, the data signal of corresponding output frequency and amplitude sine wave parameter, described digital to analog converter meets the sine wave signal of sine wave parameter according to described sine wave parameter output, described Voltag driving circuit amplifies sine wave signal, be sent to transmitting transducer 6, described transmitting transducer 6 sends ultrasonic pulse signal, ultrasonic pulse signal is converted into the signal of telecommunication by described receiving transducer 7, described analog-digital converter transfers the described signal of telecommunication for corresponding data signal to, described field programmable gate array 2, be FPGA, obtain frequency and the amplitude of described sinusoidal wave envelope signal, the frequency of described sinusoidal wave envelope signal and amplitude are sent to described judgment means 9, described judgment means 9 judges whether the amplitude of described sinusoidal wave envelope signal and amplitude are less than default activation threshold value, judged result is sent to described digital signal processor 1, judged result is: when described amplitude and described amplitude are all not less than default activation threshold value, keep described driving voltage, continue to gather described sinusoidal wave envelope signal, simultaneously, according to the time difference of send and receive ultrasonic pulse signal between described transmitting transducer 6 and receiving transducer 7, calculate the fluid flow in described pipeline.
Be less than default activation threshold value when described data signal judges the amplitude of described sinusoidal wave envelope signal and amplitude, and for any one parameter is wherein less than default activation threshold value, the amplitude that comprises of described activation threshold value is 30mv, frequency is 1MHZ; Adopt low-voltage driving circuit 4 to amplify described sine wave signal, until described low-voltage driving circuit 4 is while increasing to maximum, the amplitude of described sinusoidal wave envelope signal and amplitude, its any one be still less than default activation threshold value; Adopt high-voltage driving circuit 5, in the time adopting described high-voltage driving circuit 5 to drive described transmitting transducer 6, in the process that voltage increases gradually within the scope of high drive, when having occurred amplitude and the amplitude of described sinusoidal wave envelope signal, its any one be all not less than default activation threshold value, judge that described pipeline is now blank pipe, and judged result is sent to described digital signal processor 1.
In the time judging described pipeline as blank pipe, adopt high-voltage driving circuit 5 to amplify described sine wave signal, compensate the distortion of described sine wave signal; While having avoided described pipeline to be blank pipe, serious because of distortion, the inaccurate problem of testing conduit flow causing.
In the time adopting described high-voltage driving circuit 5 or described low-voltage driving circuit 4, if the ultrasonic pulse signal that described transmitting transducer 6 is launched is to described receiving transducer 7, and while increasing to described high-voltage driving circuit 5 maximum, or while increasing to the maximum of described low-voltage driving circuit 4, described digital to analog converter is sent through amplifying sine wave signal by transmitting transducer 6, when the amplitude and the amplitude that have occurred described sinusoidal wave envelope signal are all less than default activation threshold value, judge that described receiving transducer 7 or transmitting transducer 6 damage, and send alarm command to described warning device 10 simultaneously, alarm sounds sound.
As shown in Figure 3, low-voltage driving circuit 4, high-voltage driving circuit 5 structure charts in the Fig. 2 providing for utility model embodiment, wherein, Y1 is low-voltage driving circuit 4, Y2 is high-voltage driving circuit 5, U3 is dual operational amplifier, and Output is the transducer excitation signal that DA converter 3 is inputted, and J1 is transmitting transducer 6.
Wherein, the electronic devices and components that described Y1 comprises respectively with Y2 equate, transducer excitation signal process high-voltage driving circuit 5 and low-voltage driving circuit 4 different amplifications respectively, after making transmitting transducer 6 that sine wave signal is amplified, through electroacoustic conversion, be converted to ultrasonic pulse signal.
When N8 in circuit be input as high level time, described high-voltage driving circuit 5 is not exported, because metal-oxide-semiconductor Q2 cut-off causes this circuit output LOW voltage; When N8 in circuit be input as low level time, described on-off circuit conducting, i.e. metal-oxide-semiconductor Q2 conducting, described high-voltage driving circuit 5 is exported, by transformer L1, high-voltage driving circuit 5 is transformed into low-voltage driving circuit 4, thereby promotes described low-voltage driving circuit 4 output voltages.
In sum, the utility model is by gathering the sinusoidal wave envelope signal of receiving transducer 7 in described pipeline, described judgment means 1 judges whether the amplitude of described sinusoidal wave envelope signal and frequency are less than default activation threshold value, when amplitude and the frequency of described sinusoidal wave envelope signal, its any one while being less than default activation threshold value, increase the driving voltage of transmitting transducer 6 in described liquid ultrasonic flowmeter, until described amplitude and described frequency are all not less than activation threshold value, judge that described pipeline is as blank pipe; Solve existing liquid ultrasonic flowmeter in the time of measuring channel flow, cannot judge that pipeline is the problem of blank pipe; When increasing the driving voltage of transmitting transducer 6, not only improve liquid ultrasonic flowmeter accuracy of measurement. When increasing the driving voltage of described transmitting transducer 6, until driving voltage is while increasing to maximum, and described amplitude and described frequency are while being less than activation threshold value, judge described transducer 7 faults, also detect described liquid ultrasonic flowmeter specific fault problem, easy to use. So the utility model has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model. Any person skilled in the art scholar all can, under spirit of the present utility model and category, modify or change above-described embodiment. Therefore, have in technical field under such as and conventionally know that the knowledgeable modifies or changes not departing from all equivalences that complete under spirit that the utility model discloses and technological thought, must be contained by claim of the present utility model.
Claims (7)
1. the detection system of a liquid ultrasonic flowmeter, it is characterized in that, this detection system electrical connection liquid ultrasonic flowmeter, whether be blank pipe in order to the pipeline that detects described liquid ultrasonic flowmeter measurement, wherein said liquid ultrasonic flowmeter comprises digital signal processor, field programmable gate array and Voltag driving circuit, and described detection system at least comprises:
Judgment means, described judgment means is electrically connected with described field programmable gate array, judges whether frequency and the amplitude of the sinusoidal wave envelope signal receiving is less than default activation threshold value, and judged result is sent to described digital signal processor;
Described digital signal processor is electrically connected described Voltag driving circuit, when amplitude and the frequency of described sinusoidal wave envelope signal, its any one while being less than default activation threshold value, send and adjust instruction, until described amplitude and described frequency are all not less than activation threshold value, judge that described pipeline is as blank pipe.
2. the detection system of liquid ultrasonic flowmeter according to claim 1, it is characterized in that, described Voltag driving circuit comprises high-voltage driving circuit and low-voltage driving circuit, wherein said low-voltage driving circuit is electrically connected described digital signal processor, be applicable to receive low-voltage driving signal, 8 to 15V voltage driving is provided, and offset of sinusoidal ripple signal amplifies; Described high-voltage driving circuit is electrically connected described digital signal processor, is applicable to receive high-voltage driven signal, and 50 to 65V voltage driving is provided, and offset of sinusoidal ripple signal amplifies.
3. the detection system of liquid ultrasonic flowmeter according to claim 1, is characterized in that, also comprises:
Digital to analog converter, the input of described digital to analog converter is electrically connected described Voltag driving circuit input, is applicable to according to sine wave parameter, and output meets the sine wave signal of sine wave parameter;
Transmitting transducer, the output of described Voltag driving circuit is electrically connected described transmitting transducer, is applicable to the sine wave signal of amplification to carry out electroacoustic conversion, generates ultrasonic pulse signal, and sends described ultrasonic pulse signal;
Receiving transducer, is applicable to obtain the ultrasonic pulse signal of transmitting transducer in described liquid ultrasonic flowmeter, and the ultrasonic pulse signal of reception is carried out to acoustic-electric conversion, obtains the signal of telecommunication;
Analog-digital converter, the output of described receiving transducer is electrically connected the input of described analog-digital converter, is applicable to the described signal of telecommunication to carry out analog-to-digital conversion, obtains described sinusoidal wave envelope signal, and wherein, described sinusoidal wave envelope signal comprises its amplitude and frequency.
4. the detection system of liquid ultrasonic flowmeter according to claim 1, it is characterized in that, described digital signal processor, also be applicable to, in the time that the amplitude of described sinusoidal wave envelope signal and frequency are all not less than default activation threshold value, keep transmitting transducer driving voltage in described liquid ultrasonic flowmeter.
5. the detection system of liquid ultrasonic flowmeter according to claim 3, it is characterized in that, described judgment means electrical connection digital signal processor, be applicable to when the driving voltage that increases described transmitting transducer, and when described amplitude and described frequency are less than activation threshold value, judge described transducer fault.
6. the detection system of liquid ultrasonic flowmeter according to claim 1, it is characterized in that, also comprise: warning device, described digital signal processor is electrically connected described warning device, be applicable to receive the alarm command that described digital signal processor sends, alarm sounds.
7. the detection system of liquid ultrasonic flowmeter according to claim 1, it is characterized in that, described digital signal processor, was also suitable for according to the time difference between ultrasonic pulse signal and the ultrasonic pulse signal of reception of transmitting, calculated the flow of liquid in described pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520336812.3U CN205262553U (en) | 2015-05-22 | 2015-05-22 | Liquid ultrasonic flowmeter's detecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520336812.3U CN205262553U (en) | 2015-05-22 | 2015-05-22 | Liquid ultrasonic flowmeter's detecting system |
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| CN205262553U true CN205262553U (en) | 2016-05-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827642A (en) * | 2019-03-29 | 2019-05-31 | 宁夏隆基宁光仪表股份有限公司 | A kind of ultrasonic wave gas meter calibration system and method based on WIFI communication |
| CN112964319A (en) * | 2021-03-23 | 2021-06-15 | 天津商业大学 | Multi-frequency array ultrasonic flowmeter |
| CN113959510A (en) * | 2021-09-18 | 2022-01-21 | 深圳市华奥通通信技术有限公司 | Method and device for determining working frequency of transducer, flowmeter and storage medium |
-
2015
- 2015-05-22 CN CN201520336812.3U patent/CN205262553U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827642A (en) * | 2019-03-29 | 2019-05-31 | 宁夏隆基宁光仪表股份有限公司 | A kind of ultrasonic wave gas meter calibration system and method based on WIFI communication |
| CN112964319A (en) * | 2021-03-23 | 2021-06-15 | 天津商业大学 | Multi-frequency array ultrasonic flowmeter |
| CN113959510A (en) * | 2021-09-18 | 2022-01-21 | 深圳市华奥通通信技术有限公司 | Method and device for determining working frequency of transducer, flowmeter and storage medium |
| CN113959510B (en) * | 2021-09-18 | 2023-09-22 | 深圳市华奥通通信技术有限公司 | Method and device for determining working frequency of transducer, flowmeter and storage medium |
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