CN202915965U - Flow measuring device - Google Patents
Flow measuring device Download PDFInfo
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- CN202915965U CN202915965U CN 201220267929 CN201220267929U CN202915965U CN 202915965 U CN202915965 U CN 202915965U CN 201220267929 CN201220267929 CN 201220267929 CN 201220267929 U CN201220267929 U CN 201220267929U CN 202915965 U CN202915965 U CN 202915965U
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Abstract
The utility model discloses a flow measuring device which comprises an air mixing judging portion for judging whether air is mixed in a measured flow path according to spreading time measured by a timing portion and an alarming portion for conducting alarming when abnormal use of gas is judged. When the air mixing judging portion detects that the air is mixed into the flow path, an abnormal use judging portion judges that the gas is used abnormally, and therefore abnormal use of the gas can be prevented.
Description
Technical field
The utility model relates to a kind of flow measurement device that utilizes the flow of ultrasonic measurement combustion gas etc.
Background technology
Existing flow measurement device comprises: the appliance identification section of the Gas appliance that judge to use with produce with register storage part in be judged to be the undesired use identification part of the undesired use of combustion gas during the different particular flow rate change curve of the appliance identification value registered.
Here, if existing flow measurement device detects at the appointed time the different specific flow curve of flow changing curve that continues minus flow etc. and normal Gas appliance when occuring, just the user has occured irregular behaviors such as gas meter apparatus dismountings in judgement.
Yet, gas meter apparatus is unloaded for improper use combustion gas the certain user or pipeline is transformed when gas meter apparatus is installed by-pass pipe, if the abnormal flow change curves such as minus flow do not occur existing flow measurement device, have the problem (example wherein can with reference to Japanese disclosure of the Invention communique 2009-139309 number) of the undesired use that may not find combustion gas.
The utility model content
Flow measurement device of the present utility model comprises: a pair of ultrasonic sensor, and signal transmission unit, signal receiving part, timing section, flow rate calculation section, air is sneaked into and is had or not judging part, undesired use judging part, and warning section.A pair of ultrasonic sensor is arranged on the upstream and downstream of the measurement stream that the measured fluid of the gas that acts as a fuel flows through.Signal transmission unit drives the ultrasonic sensor that is made as the signal transmitter side.Signal receiving part detects the received ultrasonic signal of ultrasonic sensor that is made as the signal receiver side.Timing section is carried out timing to the ultrasonic signal that sends from a side ultrasonic sensor by the travel-time that the opposite side ultrasonic sensor receives.Flow rate calculation section is calculated according to the flow of travel-time to measured fluid.Air is sneaked into the travel-time that has or not judging part to measure according to timing section and is judged having or not air to sneak in the measurement stream.Whether undesired use judging part is that undesired use is judged to combustion gas.Warning section makes at undesired use judging part and reporting to the police when the undesired use of combustion gas is judged.Sneak into when having or not judging part to detect air to sneak at air, undesired use judging part judges that then combustion gas is by undesired use.
Structure is accordingly sneaked into when having or not judging part to detect air to sneak at air, and undesired use judging part is just judged the undesired use of having carried out the combustion gas such as device is removed, pipeline transformation.Thus, can prevent rapidly the undesired use of combustion gas, the flow changing curve that does not need to set using appliance can be brought into use easily, improves the convenience that uses.
Description of drawings
Fig. 1 represents the schematic block diagram of an example of the flow measurement device of the utility model embodiment 1.
Fig. 2 represents the performance plot of an example of travel-time abnormal situation of ultrasonic signal of the flow measurement device of the utility model embodiment 1.
Embodiment
Below in conjunction with accompanying drawing embodiment more of the present utility model are elaborated, and identical or suitable key element is used prosign in following all figure, and omit its repeat specification.It is pointed out that embodiment does not limit the utility model scope.
(embodiment 1)
Below in conjunction with Fig. 1 the flow measurement device of the utility model embodiment 1 is explained.Fig. 1 represents the schematic block diagram of an example of the flow measurement device of the utility model embodiment 1.
(structure of flow measurement device)
The structure of flow measurement device of the present utility model at first is described.
As shown in Figure 1, the flow measurement device of present embodiment comprises: a pair of ultrasonic sensor 2 and 3, signal transmission unit 4, signal receiving part 5, timing section 6, flow rate calculation section 7, air is sneaked into and is had or not judging part 8, undesired use judging part 9, warning section 10, switching part 11 is measured control part 12.A pair of ultrasonic sensor 2 and 3 is arranged on the upstream and downstream of the measurement stream that measured fluid flows through.Signal transmission unit 4 drives the ultrasonic sensor 2(or 3 that is made as the signal transmitter side).Signal receiving part 5 detects the ultrasonic sensor 3(or 2 that is made as the signal receiver side) ultrasonic signal that receives.Travel-time till 6 pairs of ultrasonic signals from a side ultrasonic sensor 2 or 3 transmissions of timing section are received by opposite side ultrasonic sensor 3 or 2 is carried out timing.Flow rate calculation section 7 is calculated according to the flow of above-mentioned travel-time to measured fluid.Air is sneaked into the travel-time that has or not judging part 8 to measure according to timing section 6 and is not judged to measuring stream 1 entrained air having.Undesired use judging part 9 is used for judging whether undesired use of combustion gas.Warning section 10 reports to the police when judging the undesired use of combustion gas.Switching part 11 switchings are set as the signal receiver side with the side in ultrasonic sensor 2 or the ultrasonic sensor 3, and the opposing party is set as the signal transmitter side.Measure control part 12 and control the flow measurement of the measured fluid that carries out according to ultrasonic signal.Here, ultrasonic sensor 2 and ultrasonic sensor 3 are relatively arranged, with the angled φ of axle of the stream of the measurement stream 1 of flowing through of measured fluid.
(operation of flow measurement device)
Next, the start of the flow measurement device of said structure described.
Measure control part 12 control switching parts 11, at first, setting ultrasonic sensor 2 is the signal transmitter side, and ultrasonic sensor 3 is the signal receiver side.Then, the driving signal that sends from signal transmission unit 4 is input to the ultrasonic sensor 2 that is set to the signal transmitter side, sends ultrasonic signal from ultrasonic sensor 2.Travel-time till the ultrasonic sensor 3 of the received side of ultrasonic signal that 6 measurements of timing section are sent receives.
Then, measure control part 12 control switching parts 11, switching is set as the signal transmitter side with ultrasonic sensor 3, and ultrasonic sensor 2 is set as the signal receiver side.So the driving signal that sends from signal transmission unit 4 is input to the ultrasonic sensor 3 that is set to the signal transmitter side, sends ultrasonic signal from ultrasonic sensor 3.Travel-time till the ultrasonic sensor 2 of the received side of ultrasonic signal that 6 measurements of timing section are sent receives.
In addition, the ultrasonic signal between ultrasonic sensor 2 and the ultrasonic sensor 3 sends and receives the number of times (n time) that operation repeats to stipulate, required time is measured by timing section 6, like this, can improve measuring accuracy.
As mentioned above, measure control part 12 control switching parts 11, switch ultrasonic sensor 2 and ultrasonic sensor 3 as the setting of signal transmitter side and signal receiver side, and measure travel-time in the separately setting situation according to said method.Flow rate calculation section 7 calculates based on (formula 1) and obtains flow Q.
Q=Sv=SL/2COS φ ﹛ ﹙ 1/t1 ﹚-﹙ 1/t2 ﹚ ﹜ ... (formula 1)
In (formula 1), each mark is defined as follows.L is ultrasonic sensor 2 and 3 coverages on flow direction of ultrasonic sensor.T1 is travel-time of 3 from ultrasonic sensor 2 to ultrasonic sensor.T2 is travel-time of 2 from ultrasonic sensor 3 to ultrasonic sensor.V is the flow velocity of detected fluid.S is the area of section of measuring stream 1.φ is ultrasonic sensor 2 and 3 and measure the axle angulation of stream 1.Q is the flow of measured fluid.Repeatedly carry out successively such flow measurement, along with the time adds up flow, measure integrated flow.
Herein, in the flow measurement device of present embodiment, air is sneaked into and is had or not judging part 8 to continue record when the travel-time of flow rate calculation section 7 detects flow when being zero measurement section 6 measured ultrasonic signals, and the variation in the travel-time when being zero to flow monitors.
Fig. 2 represents the performance plot of an example of travel-time abnormal of ultrasonic signal of the flow measurement device of the utility model embodiment 1.The longitudinal axis of Fig. 2 represents the travel-time t of ultrasonic signal, and transverse axis represents elapsed time T under the measuring state, shows the variation characteristic of travel-time t.
In Fig. 2, the travel-time t of the ultrasonic signal in the regulation combustion gas of using represents that with t g the travel-time t of ultrasonic signal represented with ta when 1 li air of measurement stream was sneaked into.Here, with the principal ingredient of the using combustion gas situation (tg＜ta) describe as methane.
Arrange and after trial run confirmed, along with device is brought into use, air was sneaked into and had or not judging part 8 correspondences when flow is zero travel-time t to be continued record at flow measurement device (following also have the situation that slightly is called device).
As shown in Figure 2, after device was brought into use, the set travel-time that timing section 6 records the ultrasonic signal in the combustion gas of using was maintained to till the time point T1 as the state of tg.At time point T1, air is sneaked into and is had or not judging part 8 to begin to detect the variation of travel-time t.From time point T1 to being the increase variable domain the time point T2, air is sneaked into and is had or not detection unit 8 to detect the irregular variation that is increase trend of travel-time t.In this increased variable domain, the travel-time, t showed, the variation pattern along with irregular, the regulation of travel-time t of measuring when pipeline is removed that 1 li entrained air of stream causes.
At time point T2, travel-time t is able to assert and measures 1 li travel-time ta that has air to sneak into of stream, and air is sneaked into and had or not judging part 8 to detect air to sneak into.
From time point T2 to the time point T3, sneak into for air and to have or not judging part 8 to detect the air that state that air sneaks into continues always to sneak into the zone.Sneak in the zone at this air, air is sneaked into and is had or not judging part 8 to detect constantly the state that air sneaks into to have surpassed stipulated time Δ T.
From time point T3 to the time point T4, sneak into for air and to have or not judging part 8 to continue to be in to judge the lower time of state that has air to sneak into, the reduction variable domain that travel-time t diminishes towards the travel-time tg in combustion gas in irregular change.At time point T4, it is the state of the travel-time tg in combustion gas that timing section 6 returns to what measure, and air is sneaked into and had or not judging part 8 to detect without air to sneak into.
Sneak into that to have or not threshold value that judging part 8 judges the travel-time t when having air to sneak into be 100% the situation of travel-time ta when being full of air for measuring stream 1 although expressed air among Fig. 2, air is sneaked into and is had or not judging part 8 to judge that the threshold value of the travel-time t when having air to sneak into not necessarily will be made as the value when measuring stream 100% and being full of air.The threshold value of sneaking into the travel-time t when having or not judging part 8 to judge to have air to sneak into by setting air is, (ultrasonic signal travel-time) value when measuring the mixed gas that the combustion gas that is full of air and employed regulation in the stream 1 mixes with any melting concn, accuracy of detection can be improved.But travel-time t may reach the value larger than travel-time ta after reaching air and sneaking into travel-time ta when having or not judging part 8 to judge to have air to sneak in this case.In addition, air sneak into have or not judging part 8 to judge to have air to sneak into after, the travel-time tgg(ta＞tgg the when threshold value of judging the travel-time t that sneaks into without air also can be made as and measure 1 li of stream and sneaked into a small amount of air＞tg).
Like this, variation according to travel-time t, when timing section 6 measured travel-time t and is able to assert travel-time ta when measuring 1 li entrained air of stream, air was sneaked into and is had or not judging part 8 to detect air to sneak into, and undesired use judging part 9 judges that undesired use occurs coal gas.And then undesired use judging part 9 is informed the warning that (user) is unusual by warning section 10.
Accordingly, air is sneaked into and is had or not judging part 8 to detect air to sneak into namely and to judge and combustion gas has occured by the situation of undesired use.Like this, when the undesired use of combustion gas occurs, can detect rapidly, can prevent rapidly the undesired use of combustion gas.
The variation pattern that changes to the travel-time t in the travel-time ta process when measuring 1 li entrained air of stream from the travel-time t g combustion gas is the variation pattern of the regulation in the above-mentioned increase variable domain, when air was sneaked into and had or not judging part 8 to detect air to sneak into, undesired use judging part 9 will be judged combustion gas undesired use occurs.Accordingly, the generation to 1 li entrained air of measurement stream that can detect more reliably anticipates for some reason causes can improve the precision that detects the undesired use of combustion gas.
When relying on air to sneak into to have or not judging part 8 to detect the state continuance official hour Δ T that air sneaks into, undesired use judging part 9 can judge that coal gas are by undesired use.On the other hand, rely on air to sneak into to have or not judging part 8 to detect state continuance that air sneaks into than official hour Δ T in short-term, undesired use judging part 9 can not judge that undesired use occurs in combustion gas.Thus, prevent from the false alarm sent in the situations such as residual air that the upstream of fuel gas pipeline exists flows through from can improving user's ease of use.
In addition, in the present embodiment, when detecting the undesired use of combustion gas, the abnormal alarm that relies on warning section 10 to carry out the undesired use of combustion gas is not limited only to the alarm of the undesired use of device, can also be information from undesired use to the combustion gas provider that circulate a notice of.Also have, when detecting the undesired use of combustion gas, also can block by the block valve (not shown) that device is equipped with the supply of combustion gas.
Like this, detect the undesired use of combustion gas by the travel-time t of ultrasonic signal, the flow changing curve that produces in the time of needn't setting in advance the Gas appliance that the downstream that is installed in advance device uses and the work of this Gas appliance when beginning is used in combustion gas can be brought into use combustion gas very easily.And then, can cut down the step of bringing into use the troubles such as selection, input of the Gas appliance that carries out along with combustion gas.Like this, the higher fuel gas supply of person or user property easy to use that can offer the gas supply.And then the simplification by device and the reduction of step when using beginning can reduce cost.
In sum, sneak into when having or not judging part 8 to detect air to sneak at air, undesired use judging part 9 is judged the undesired use of combustion gas.Thus, judge to measure and have entrained air to be in the stream 1 because the user uses combustion gas to unload gas meter apparatus or transform pipeline as purpose to make device be provided with so undesired (use) behavior of manifold, cause entrained air in the pipeline with undesired.Thus, can detect reliably the situation of the transformation of fuel gas pipeline, promptly prevent the undesired use of combustion gas.
And, in the flow measurement device of present embodiment, the travel-time t that timing section 6 records is when never the travel-time t g when measuring entrained air in the stream 1 changes to variation pattern that air sneaks into the travel-time t in the travel-time ta change procedure when measuring stream 1 for the variation pattern of regulation, and undesired use judging part 9 is judged the undesired use of combustion gas is occured.
Thus, be conceived to the variation pattern of travel-time t, the pilot process of the travel-time ta when the travel-time t that timing section 6 measures reaches and measures 1 li of stream and have air to sneak into judges that undesired use occurs in combustion gas during for the variation pattern of regulation, like this, can improve accuracy of detection.
In addition, in the flow measurement device of present embodiment, when relying on air to sneak into to have or not judging part 8 to detect the state continuance official hour Δ T that air sneaks into, undesired use judging part 9 judges that undesired use occurs in combustion gas.
Thus, the time that relies on air to sneak into to have or not judging part 8 to detect the state that air sneaks into than official hour Δ T in short-term, can not judge that undesired use occurs in combustion gas.To sum up, send false alarm in the situation in the time of preventing that residual air that the upstream of fuel gas pipeline exists from flowing through etc., improve user's ease of use.
(variation)
Variation for the flow measurement device of present embodiment sees figures.1.and.2 and makes specific description.
In the flow measurement device of the variation of present embodiment, also can be to sneak at air to have or not judging part 8 to detect air to detect again in the situation of sneaking into without air after sneaking into, undesired use judging part 9 is judged the structure of the undesired use of combustion gas.That is, in embodiment 1, air is sneaked into and is had or not judging part 8 to detect air to sneak into and namely judge the undesired use of combustion gas, according to this variation, also can be that air is sneaked into and detected again after having or not judging part 8 to detect air to sneak in the situation of sneaking into without air (among the variation characteristic figure of travel-time t shown in Figure 2, detect when sneaking into without air at time point T4), judge the undesired use of combustion gas.
Like this in measuring stream 1 entrained air, air is sneaked into and is had or not judging part 8 to detect again the situation of sneaking into without air afterwards, then judge it is because the user uses combustion gas to unload gas meter apparatus or transform pipeline as order to make device be provided with so improperly behavior of by-pass tube, cause entrained air in the pipeline with undesired.Air is sneaked into and is had or not judging part 8 to detect first to detect again the situation of sneaking into without air after air is sneaked into, can judge the situation that the user has transformed the gas supply pipeline and then device is installed.Judge according to such two-fold, judge the undesired use of combustion gas, therefore can detect reliably the transformation of fuel gas pipeline, prevent reliably the undesired use of combustion gas.
And, in Fig. 2, what illustrate is that air is sneaked into and detected the situation of sneaking into without air after having or not judging part 8 to detect the state continuance official hour Δ T that air sneaks into again, also can be that the state that has air to sneak into does not continue to reach official hour Δ T and just detects in the situation of sneaking into without air, judge that namely undesired use occurs in combustion gas.
The variation pattern of travel-time t when (ultrasound wave) the travel-time tg combustion gas during entrained air does not change to travel-time ta when measuring 1 li entrained air of stream in measuring stream 1 is the variation pattern of the regulation in the above-mentioned increase variable domain, when air was sneaked into and had or not judging part 8 to detect air to sneak into, undesired use judging part 9 was judged undesired use is occured.Accordingly, the generation to 1 li entrained air of measurement stream that deliberately causes can be detected more reliably, therefore the precision that detects the undesired use of combustion gas can be improved.
Rely on air to sneak into and have or not judging part 8, when detecting the state continuance official hour Δ T that air sneaks into, undesired use judging part 9 judges that undesired use occurs coal gas.On the other hand, rely on air to sneak into to have or not judging part 8 to detect state continuance that air sneaks into than official hour Δ T in short-term, undesired use judging part 9 can not judge that undesired use occurs in combustion gas.Thus, prevent from the warning useless of sending in the situations such as residual air that the upstream of fuel gas pipeline exists flows through from can improving user's property easy to use.
In sum, sneak at air and to have or not judging part 8 to detect air to detect again in the situation of sneaking into without air after sneaking into, undesired use judging part 9 is judged the undesired use of combustion gas.Accordingly, can detect reliably because the transformation that user's improper activity is carried out fuel gas pipeline prevents the undesired use of combustion gas reliably.
In the flow measurement device of the variation of present embodiment, at the travel-time t that relies on timing section 6 to measure when never the travel-time tg when measuring entrained air in the stream 1 changes to variation pattern that air sneaks into the travel-time t in the change procedure of the travel-time ta when measuring stream 1 for the variation pattern of regulation, undesired use judging part 9 is judged the undesired use of combustion gas is occured.
Thus, be conceived to the variation pattern of travel-time t, the pilot process of the travel-time ta when the travel-time t that timing section 6 measures reaches and measures 1 li of stream and have air to sneak into judges that undesired use occurs in combustion gas during for the variation pattern of regulation, like this, can improve accuracy of detection.
In the flow measurement device of the variation of present embodiment, when relying on air to sneak into to have or not judging part 8 to detect the state continuance official hour Δ T that air sneaks into, undesired use judging part 9 judges that undesired use occurs in combustion gas.
Thus, the time that relies on air to sneak into to have or not judging part 8 to detect the state that air sneaks into than official hour Δ T in short-term, can not judge that undesired use occurs in combustion gas, can prevent be not be the air cause of the dismounting of pipeline and installing again sneak into but residual air that the upstream of fuel gas pipeline exists when flowing through etc. situation issue the warning of the usefulness of haunting, improve user's ease of use.
And, the utility model is not limited to the embodiment of above-mentioned record, may have different conversion in the illustrated scope of the claim scope of patent, different embodiments or a plurality of variation separately disclosed technological means are carried out the resulting embodiment of suitable combination and are also contained in the scope of technology of the present utility model.
In sum, in flow measurement device of the present utility model, sneak at air and to have or not in the judging part according to the travel-time of ultrasonic signal, detect to measure in the stream and have or not air to sneak into.Therefore, so long as measure the field of fluid, no matter measured fluid is what can be suitable for.
As described above, flow measurement device of the present utility model comprises: a pair of ultrasonic sensor, signal transmission unit, signal receiving part, timing section, flow rate calculation section, air are sneaked into judging part, undesired use judging part and the warning section of having or not.A pair of ultrasonic sensor is arranged on the upstream and downstream of the measurement stream that the measured fluid of the gas that acts as a fuel flows through.Signal transmission unit drives the ultrasonic sensor that is made as the signal transmitter side.Signal receiving part detects the received ultrasonic signal of ultrasonic sensor that is made as the signal receiver side.Timing section is carried out timing to the ultrasonic signal that sends from a side ultrasonic sensor by the travel-time that the opposite side ultrasonic sensor receives.Flow rate calculation section is calculated according to the flow of travel-time to measured fluid.Air is sneaked into the travel-time that has or not judging part to measure according to timing section and is judged having or not air to sneak in the measurement stream.Whether the combustion gas of undesired use judgement section judges is undesired use.Warning section makes at undesired use judging part and reporting to the police when the undesired use of combustion gas is judged.Sneak into when having or not judging part to detect air to sneak at air, undesired use judging part judges that then undesired use has occured in combustion gas.
Structure accordingly, air are sneaked into and are had or not judging part when having detected air and sneak into, and undesired use judging part is just judged the undesired use of having carried out the combustion gas such as device is removed, pipeline transformation.Thus, can prevent rapidly the undesired use of combustion gas, the flow changing curve that does not need to set using appliance can be brought into use easily, improves the convenience that uses.
In flow measurement device of the present utility model, when the travel-time that relies on timing section to measure, never the travel-time when measuring entrained air in the stream changed to variation pattern that air sneaks into the travel-time in the travel-time change procedure when measuring stream for the variation pattern of regulation, undesired use judging part was judged the undesired use of combustion gas has been occured.
Rely on such structure, being conceived to never travel-time when measuring entrained air in the stream changes to the variation pattern that air is sneaked into the travel-time in the travel-time change procedure when measuring stream, increase the situation in the process of considering to reach the travel-time when having air to sneak into the measurement stream, can improve accuracy of detection.
In addition, in the flow measurement device of utility model, when relying on air to sneak into to have or not judging part to detect the state continuance official hour that air sneaks into, undesired use judging part judges that then undesired use has occured in combustion gas.
Rely on such structure, also can not be judged as the undesired use of combustion gas even air sneaks into to have or not judging part to detect to have air to sneak in the short time.Thus, the situation such as can prevent when residual air that the upstream of fuel gas pipeline exists from flowing through issues the warning of the usefulness of haunting, and improves user's ease of use.
Flow measurement device of the present utility model comprises: a pair of ultrasonic sensor, signal transmission unit, signal receiving part, timing section, flow rate calculation section, air are sneaked into judging part, undesired use judging part and the warning section of having or not.A pair of ultrasonic sensor is arranged on the upstream and downstream of the measurement stream that the measured fluid of the gas that acts as a fuel flows through.Signal transmission unit drives the ultrasonic sensor that is made as the signal transmitter side.Signal receiving part detects the received ultrasonic signal of ultrasonic sensor that is made as the signal receiver side.Timing section is carried out timing to the ultrasonic signal that sends from a side ultrasonic sensor by the travel-time that the opposite side ultrasonic sensor receives.Flow rate calculation section is calculated according to the flow of travel-time to measured fluid.Air is sneaked into the travel-time that has or not judging part to measure according to timing section and is judged having or not air to sneak in the measurement stream.Whether the combustion gas of undesired use judgement section judges is undesired use.Warning section makes at undesired use judging part and reporting to the police when the undesired use of combustion gas is judged.Sneak at air and to have or not judging part to detect air to detect again in the situation of sneaking into without air after sneaking into, undesired use judging part judges that then combustion gas is by undesired use.
According to this structure, rely on air to sneak into to have or not judging part to detect that air is sneaked into and the dismounting of judging device, further, detect again after sneaking into and do not have air to sneak into and judge device to be mounted when having detected air, judge the undesired use of combustion gas by two-fold as above.Therefore, can detect reliably the transformation of fuel gas pipeline, prevent reliably the undesired use of combustion gas.
In flow measurement device of the present utility model, when the travel-time that relies on timing section to measure, never the travel-time when measuring entrained air in the stream changed to variation pattern that air sneaks into the travel-time in the travel-time change procedure when measuring stream for the variation pattern of regulation, the undesired use of undesired use judgement section judges generation combustion gas.
Rely on such structure, being conceived to never travel-time when measuring entrained air in the stream changes to the variation pattern that air is sneaked into the travel-time in the travel-time change procedure when measuring stream, increase the situation in the process of considering to reach the travel-time when having air to sneak into the measurement stream, can more improve accuracy of detection.
In addition, in the flow measurement device of utility model, when relying on air to sneak into to have or not judging part to detect the state continuance official hour that air sneaks into, undesired use judging part judges that then undesired use has occured in combustion gas.
Rely on such structure, also can not be judged as the undesired use of combustion gas even air sneaks into to have or not judging part to detect to have air to sneak in the short time.Thus, the situation such as can prevent when residual air that the upstream of fuel gas pipeline exists from flowing through issues the warning of the usefulness of haunting, and improves user's ease of use.
Claims (6)
1. flow measurement device is characterized in that comprising:
A pair of ultrasonic sensor is located at the upstream and downstream of the measurement stream that the detected fluid of the gas that acts as a fuel flows through;
Driving is made as the signal transmission unit of the described ultrasonic sensor of signal transmitter side;
Detection is made as the signal receiving part of the received ultrasonic signal of the described ultrasonic sensor of signal receiver side;
Timing section is carried out timing to the ultrasonic signal that sends from the described ultrasonic sensor of a side by the travel-time that the described ultrasonic sensor of opposite side receives;
The flow rate calculation section of described measured fluid flow being calculated according to the described travel-time;
Air is sneaked into and is had or not judging part, judges having or not air to sneak in the described measurement stream according to the travel-time that described timing section measures;
Judge the undesired use judging part of the undesired use of described fuel gas;
Warning section reports to the police when undesired use judging part is made the undesired use judgement of described fuel gas;
Sneak into when having or not judging part to detect air to sneak at described air, described undesired use judging part judges that described fuel gas is by undesired use.
2. flow measurement device as claimed in claim 1, it is characterized in that: when the variation pattern in the travel-time in the travel-time change procedure when never the travel-time during entrained air changed to air and sneaked into described measurement stream in the described measurement stream travel-time of being measured by described timing section was the variation pattern of regulation, described undesired use judging part was judged the undesired use of fuel gas has been occured.
3. flow measurement device as claimed in claim 1 or 2, it is characterized in that: when relying on described air to sneak into to have or not judging part to detect the state continuance official hour that air sneaks into, described undesired use judging part judges that undesired use has occured described fuel gas.
4. flow measurement device is characterized in that comprising:
A pair of ultrasonic sensor is arranged on the upstream and downstream of the measurement stream that the detected fluid of the gas that acts as a fuel flows through;
Driving is made as the signal transmission unit of the described ultrasonic sensor of signal transmitter side;
Detection is made as the signal receiving part of the received ultrasonic signal of the described ultrasonic sensor of signal receiver side;
Timing section passes to the travel-time of the described ultrasonic sensor reception of opposite side and carries out timing to the ultrasonic signal that sends from the described ultrasonic sensor of a side;
The flow rate calculation section of described measured fluid flow being calculated according to the described travel-time;
Air is sneaked into and is had or not judging part, judges having or not air to sneak in the described measurement stream according to the travel-time that described timing section measures;
Judge the undesired use judging part of the undesired use of described fuel gas;
Warning section reports to the police when undesired use judging part is made the undesired use judgement of described fuel gas;
Described air is sneaked into and is had or not judging part to detect air to detect again after sneaking into when sneaking into without air, and described undesired use judging part judges that then fuel gas is by undesired use.
5. flow measurement device as claimed in claim 4, it is characterized in that: when the variation pattern in the travel-time in the travel-time change procedure when never the travel-time during entrained air changed to air and sneaked into described measurement stream in the described measurement stream travel-time of being measured by described timing section was the variation pattern of regulation, described undesired use judging part was then judged the undesired use of fuel gas has been occured.
6. such as claim 4 or 5 described flow measurement devices, it is characterized in that: sneaked into when having or not judging part to detect the state continuance official hour that air sneaks into by described air, described undesired use judging part judges that then undesired use has occured described fuel gas.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-126983 | 2011-06-07 | ||
| JP2011126983A JP2012251967A (en) | 2011-06-07 | 2011-06-07 | Flow rate measuring device |
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| CN202915965U true CN202915965U (en) | 2013-05-01 |
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| CN 201220267929 Expired - Fee Related CN202915965U (en) | 2011-06-07 | 2012-06-07 | Flow measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784030A (en) * | 2016-02-29 | 2016-07-20 | 郑再峰 | Antitheft method of metering of gas ultrasonic flow meter |
| CN109323733A (en) * | 2018-09-18 | 2019-02-12 | 金卡智能集团股份有限公司 | Gas meter, flow meter tamper detection method based on air composition detection |
-
2011
- 2011-06-07 JP JP2011126983A patent/JP2012251967A/en not_active Withdrawn
-
2012
- 2012-06-07 CN CN 201220267929 patent/CN202915965U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784030A (en) * | 2016-02-29 | 2016-07-20 | 郑再峰 | Antitheft method of metering of gas ultrasonic flow meter |
| CN109323733A (en) * | 2018-09-18 | 2019-02-12 | 金卡智能集团股份有限公司 | Gas meter, flow meter tamper detection method based on air composition detection |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012251967A (en) | 2012-12-20 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20160607 |