CN214473455U - Gas check out test set and gas system - Google Patents
Gas check out test set and gas system Download PDFInfo
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- CN214473455U CN214473455U CN202120016427.6U CN202120016427U CN214473455U CN 214473455 U CN214473455 U CN 214473455U CN 202120016427 U CN202120016427 U CN 202120016427U CN 214473455 U CN214473455 U CN 214473455U
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Abstract
The application provides a gas detection device and a gas system, which comprise a control unit, a measurement unit, a first ultrasonic unit, a second ultrasonic unit, a signal processing unit, a calculation unit and a switching unit, wherein the control unit is respectively connected with the charging time measurement unit, the first ultrasonic unit, the second ultrasonic unit, the signal processing unit and the calculation unit; one end of the switching unit is connected with the signal processing unit, and the other end of the switching unit is respectively connected with the first ultrasonic unit and the second ultrasonic unit; first ultrasonic wave unit and second ultrasonic wave unit set up respectively in the upper and lower reaches of gas pipeline, and the switching unit is used for realizing through first ultrasonic wave unit transmission ultrasonic wave, through second ultrasonic wave unit receiving ultrasonic wave or realize through second ultrasonic wave unit transmission ultrasonic wave, through first ultrasonic wave unit receiving ultrasonic wave, and the control unit is so that charge time measuring unit and calculating unit calculate and obtain the gas velocity of flow, has improved the accuracy that the gas detected.
Description
Technical Field
The application relates to the technical field of gas equipment, in particular to gas detection equipment and a gas system.
Background
In recent years, with the increase of population and the development of economy, the demand of people on energy is gradually increased, and energy supply faces huge pressure, under the condition, the production and living mode taking coal as a main energy structure cannot meet the demand of energy, the demand of environmental protection and the requirement of sustainable development at the present stage, under the condition, natural gas is focused as clean energy, and in order to standardize the use standard of the natural gas, the natural gas needs to be detected for efficient utilization and monitoring.
In the related art, an ultrasonic gas meter based on a Time To Digital Converter (TDC) chip is generally used for gas detection, and the principle is that a Micro Control Unit (MCU) in the ultrasonic gas meter controls an ultrasonic sensor in the TDC chip to transmit sound wave signals to a receiving end in a downstream direction and a reverse direction respectively, and then the sound wave signals are transmitted to the TDC chip after being filtered and amplified by respective circuits and then the MCU is notified to obtain a Time difference between the ultrasonic waves passing through the downstream direction and the reverse direction, and the gas flow rate is calculated according to the Time difference.
However, in the prior art, due to the influence of the stability of devices in the ultrasonic gas meter, the accuracy of gas detection is not high.
SUMMERY OF THE UTILITY MODEL
The application provides a gas check out test set and gas system to among the solution prior art, the cost of TDC chip is too high, causes the gas to detect with high costs, moreover because the influence of the device stability in the ultrasonic gas table, the not high technical problem of accuracy that the gas detected.
In a first aspect, the application provides a gas detection device, which includes a control unit, a measurement unit, a first ultrasonic unit, a second ultrasonic unit, a signal processing unit, a calculation unit and a switching unit, wherein the control unit is respectively connected with the measurement unit, the first ultrasonic unit, the second ultrasonic unit, the signal processing unit and the calculation unit; the first ultrasonic unit and the second ultrasonic unit are respectively arranged at the upstream and downstream of the gas pipeline, the switching unit is used for realizing the transmission of ultrasonic waves through the first ultrasonic unit and the reception of the ultrasonic waves through the second ultrasonic unit or realizing the transmission of the ultrasonic waves through the second ultrasonic unit and the reception of the ultrasonic waves through the first ultrasonic unit, the control unit controls the first ultrasonic unit and the second ultrasonic unit to transmit and receive ultrasonic signals, sends the received ultrasonic signals to the signal processing unit and sends the processed signals to the control unit; the control unit sends the processed signals to the measuring unit and the calculating unit so that the measuring unit and the calculating unit calculate the gas flow rate.
Here, the gas detection device of the embodiment of the present application is composed of a control unit, a measurement unit, a first ultrasonic unit, a second ultrasonic unit, a signal processing unit, a calculation unit and a switching unit, and further includes a switching unit, one end of the switching unit is connected to the signal processing unit, the other end is respectively connected to the first ultrasonic unit and the second ultrasonic unit, the switching unit can connect the signal processing unit to the first ultrasonic unit or connect the signal processing unit to the second ultrasonic unit to control whether the first ultrasonic unit and the second ultrasonic unit transmit or receive ultrasonic waves, and it is not necessary to separately set a separate signal processing unit for ultrasonic signals of two branches, on one hand, the cost of redundant parts is saved, on the other hand, the influence of measurement errors caused by non-uniform devices is avoided, the accuracy of gas detection is further improved.
Optionally, the measurement unit is a charging time measurement unit.
Here, the embodiment of the application adopts the charging time measuring unit to perform charging measurement, so that the time difference of transmission of the ultrasonic waves in the gas pipeline is obtained, an expensive TDC chip is not required to be adopted for measurement and calculation, the cost of gas detection is saved, in addition, the charging time measuring unit is internally provided with the constant current source, the capacitor is charged by adopting the internal constant current source, the flow velocity of the ultrasonic waves in a pipeline medium is calculated, the influence of environmental interference on the charging time measurement is reduced, the accuracy of time measurement is improved, and the accuracy of gas detection is improved.
Optionally, the calculating unit includes a timing unit and a comparing unit; the timing unit is connected with the comparison unit, and the timing unit and the comparison unit are respectively connected with the control unit;
the timing unit is used for providing a clock signal for the control unit;
the comparison unit is used for providing effective calculation data for the control unit.
Here, the calculating unit in the embodiment of the present application may include a timing unit and a comparing unit, the timing unit may provide a clock signal required for measurement and calculation according to control of the control unit, and may also trigger the first ultrasonic unit and the second ultrasonic unit to transmit ultrasonic waves according to the clock signal, the timing unit may further be configured to accurately obtain time for transmitting and receiving signals, the comparing unit may perform validity judgment according to the obtained signal data, thereby obtaining effective and accurate calculation data, obtaining accurate gas flow rate according to limited and accurate calculation data, and further improving accuracy of gas detection.
Optionally, the ultrasonic wave trigger unit is further included;
one end of the ultrasonic trigger unit is connected with the control unit, and the other end of the ultrasonic trigger unit is respectively connected with the first ultrasonic unit and the second ultrasonic unit and used for sending trigger signals to the first ultrasonic unit and the second ultrasonic unit according to instructions of the control unit.
Here, the embodiment of the present application further includes an ultrasonic trigger unit, and the ultrasonic trigger unit may send trigger signals to the first ultrasonic unit and the second ultrasonic unit according to a control signal of the control unit, so that ultrasonic waves are emitted to the first ultrasonic unit and the second ultrasonic unit for gas detection.
Optionally, the system further comprises a calibration unit;
the calibration unit is connected with the charging time measuring unit and used for calibrating the charging time measuring unit.
Here, the embodiment of the application further comprises a calibration unit, the calibration unit is connected with the charging time measuring unit, and the charging time measuring unit can be calibrated, so that the error of the charging time measuring unit is reduced, and the accuracy of gas detection is further improved.
Optionally, the signal processing unit is an amplifying circuit;
one end of the amplifying circuit is connected with the first ultrasonic unit and the second ultrasonic unit respectively, and the other end of the amplifying circuit is connected with the control unit;
the amplifying circuit is used for carrying out signal amplification processing on the received ultrasonic signals.
Optionally, the signal processing unit is a filter circuit;
one end of the filter circuit is connected with the first ultrasonic unit and the second ultrasonic unit respectively, and the other end of the filter circuit is connected with the control unit;
the filter circuit is used for filtering interference signals in the ultrasonic signals.
Optionally, the signal processing unit is a zero-crossing detection circuit;
one end of the zero-crossing detection circuit is connected with the first ultrasonic unit and the second ultrasonic unit respectively, and the other end of the zero-crossing detection circuit is connected with the control unit;
the zero-crossing detection circuit is used for controlling the output power of the processed signal.
Here, the signal processing unit that this application embodiment provided can include amplifier circuit, filter circuit and zero cross detection circuit, can amplify, filter and power control the ultrasonic signal that the receiving terminal sent, and the signal filtering after the aforesaid is handled has become invalid and unnecessary signal, and has just amplified the signal, and the ultrasonic signal after the charge time measuring unit through handling of being convenient for carries out sampling test, calculates accurate ultrasonic wave transmission time difference, has further improved the accuracy that the gas detected.
Optionally, the system further comprises an alarm unit, and the alarm unit is connected with the control unit.
Here, the alarm unit that this application embodiment provided can report to the police to the gas velocity of flow, if the gas velocity of flow is in unusual within range, is reporting to the police to prevent economic loss and the potential safety hazard that the gas velocity of flow is unusual to cause, improved the security that the gas used.
Optionally, the calculation unit and the measurement unit are arranged inside the control unit.
Here, in the embodiment of the present application, the calculating unit and the measuring unit are disposed inside the control unit, and the internal capacitor may be charged by using the constant current source inside the control unit, so as to reduce interference of an external environment on devices such as the calculating unit and the measuring unit in the gas detection device, such as radio frequency interference, external noise, and the like, and further improve accuracy of gas detection.
In a second aspect, embodiments of the present application provide a gas system, which includes a gas pipe, and a gas detection device as described in the first aspect mounted on the gas pipe.
The gas detection equipment and the gas pipeline provided by the embodiment of the application are composed of a control unit, a measuring unit, a first ultrasonic unit, a second ultrasonic unit, a signal processing unit, a calculating unit and a switching unit, wherein one end of the switching unit is connected with the signal processing unit, the other end of the switching unit is respectively connected with the first ultrasonic unit and the second ultrasonic unit, the switching unit can connect the signal processing unit with the first ultrasonic unit or connect the signal processing unit with the second ultrasonic unit so as to control the first ultrasonic unit and the second ultrasonic unit to transmit or receive ultrasonic waves, and an independent signal processing unit is not required to be arranged for ultrasonic signals of two branches, so that the cost of redundant parts is saved on one hand, and on the other hand, the influence of measurement errors caused by inconsistent devices is avoided, the accuracy of gas detection is further improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural diagram of a gas detection device provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of another gas detection device provided in the embodiment of the present application;
FIG. 3 is a schematic structural diagram of another gas detection device provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of another gas detection device provided in the embodiment of the present application.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may for example be fixed or indirectly connected through intervening media, or may be interconnected between two elements or may be in the interactive relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In recent years, with the increase of population and the development of economy, the demand of people on energy is gradually increased, and energy supply faces huge pressure, under the condition, the production and living mode taking coal as a main energy structure cannot meet the demand of energy, the demand of environmental protection and the requirement of sustainable development at the present stage, under the condition, natural gas is focused as clean energy, and in order to standardize the use standard of the natural gas, the natural gas needs to be detected for efficient utilization and monitoring.
In the related art, an ultrasonic gas meter based on a Time To Digital Converter (TDC) chip is generally used for gas detection, and the principle is that a Micro Control Unit (MCU) in the ultrasonic gas meter controls an ultrasonic sensor in the TDC chip to transmit sound wave signals to a receiving end in a downstream direction and a reverse direction respectively, and then the sound wave signals are transmitted to the TDC chip after being filtered and amplified by respective circuits and the MCU is notified to obtain a Time difference of the ultrasonic wave passing through the downstream direction and the reverse direction, and a gas flow rate is calculated according to the Time difference, which is specifically implemented as follows: the method comprises the steps that a paired ultrasonic sensors which are obliquely installed on a pipeline are utilized, a TDC chip is controlled in the downstream direction, a transmitting end of each ultrasonic sensor transmits a sound wave signal to a receiving end, and the receiving end receives the sound wave signal, transmits the sound wave signal to the TDC time measuring chip after operations such as filtering and amplification and informs an MCU of the obtained time T1; the reverse-flow direction MCU controls the transmitting end of the TDC chip ultrasonic sensor to transmit a sound wave signal to the receiving end, the receiving end receives the sound wave signal, the sound wave signal is transmitted to the TDC time measuring chip after operations such as filtering and amplification, and the MCU is informed of the obtained time T2; the flow rate was scaled from the time difference between T1 and T2.
However, in the prior art, the TDC chip has a too high cost, which greatly increases the product cost and causes a high gas detection cost, and since the circuits of the forward flow circuit and the reverse flow circuit are different circuits, although the device models are consistent, the consistency of the forward flow circuit and the reverse flow circuit caused by the individual differences of the electronic devices such as operational amplifier and resistor cannot be guaranteed, and the stability of the devices can be affected by the environment, thereby increasing the time measurement error of the forward flow circuit and the reverse flow circuit, and the gas detection accuracy is not high.
In order to solve the above technical problem, an embodiment of the present application provides a gas detection apparatus and a gas pipeline, the gas detection apparatus of the embodiment of the present application is composed of a control unit, a measurement unit, a first ultrasonic unit, a second ultrasonic unit, a signal processing unit, a calculation unit and a switching unit, wherein, one end of the switching unit of the embodiment of the application is connected with the signal processing unit, the other end is respectively connected with the first ultrasonic unit and the second ultrasonic unit, the switching unit can connect the signal processing unit with the first ultrasonic unit, or the signal processing unit is connected with the second ultrasonic unit, so that the ultrasonic signals of the two branches do not need to be independently provided with the independent signal processing unit, on one hand, the cost of redundant parts is saved, on the other hand, the influence of measurement errors caused by inconsistent devices is avoided, and the accuracy of gas detection is further improved.
The following describes the gas detection device provided in the embodiments of the present application in detail with reference to specific embodiments.
Fig. 1 is a schematic structural diagram of a gas detection device provided in an embodiment of the present application, and as shown in fig. 1, the gas detection device includes: a control unit 101, a charging time measuring unit 102, a first ultrasonic wave unit 103, a second ultrasonic wave unit 104, a signal processing unit 105, a calculation unit 106, and a switching unit 108.
The control unit 101 is connected to a charging time measuring unit 102, a first ultrasonic unit 103, a second ultrasonic unit 104, a signal processing unit 105, and a calculation unit 106, respectively.
The first ultrasonic unit 103 and the second ultrasonic unit 104 are respectively arranged upstream and downstream of the gas pipeline 107, one end of the switching unit 108 is connected with the signal processing unit 105, the other end of the switching unit 108 is respectively connected with the first ultrasonic unit 103 and the second ultrasonic unit 104, the switching unit 108 is used for realizing the transmission of ultrasonic waves through the first ultrasonic unit 103, the reception of ultrasonic waves through the second ultrasonic unit 104 or the transmission of ultrasonic waves through the second ultrasonic unit 104 and the reception of ultrasonic waves through the first ultrasonic unit 103, the control unit 104 controls the first ultrasonic unit 103 and the second ultrasonic unit 104 to transmit and receive ultrasonic signals, transmits the received ultrasonic signals to the signal processing unit 105 and transmits the processed signals to the control unit 101; the control unit 101 transmits the processed signals to the charging time measuring unit 102 and the calculating unit 106, and calculates the gas flow rate from the time information transmitted from the charging time measuring unit 102 and the calculating unit 106.
Optionally, the switching unit may be a single-pole double-throw switch, a switching circuit that can realize automatic switching between two circuits, or a device such as a relay.
Alternatively, the first ultrasonic unit and the second ultrasonic unit may be integrated ultrasonic sensors capable of transmitting and receiving ultrasonic waves, or may be ultrasonic units including independent ultrasonic transmitters and ultrasonic receivers.
Optionally, the control unit is an MCU or a Programmable Logic Controller (PLC).
Optionally, the measurement unit here is a charging time measurement unit CTMU.
Here, the embodiment of the application adopts the charging time measuring unit to perform charging measurement, so that the time difference of transmission of the ultrasonic waves in the gas pipeline is obtained, an expensive TDC chip is not required to be adopted for measurement and calculation, the cost of gas detection is saved, in addition, the charging time measuring unit is internally provided with the constant current source, the capacitor is charged by adopting the internal constant current source, the flow velocity of the ultrasonic waves in a pipeline medium is calculated, the influence of environmental interference on the charging time measurement is reduced, the accuracy of time measurement is improved, and the accuracy of gas detection is improved.
Optionally, the system further comprises a calibration unit;
the calibration unit is connected with the charging time measuring unit and used for calibrating the charging time measuring unit.
Specifically, before metering is started or before the first ultrasonic unit is controlled to transmit signals, the calibration unit charges the capacitor twice, so that the calibration value K can be calculated, and the calculated time is assigned with the value K.
Here, the embodiment of the application further comprises a calibration unit, the calibration unit is connected with the charging time measuring unit, and the charging time measuring unit can be calibrated, so that the error of the charging time measuring unit is reduced, and the accuracy of gas detection is further improved.
Specifically, the calibration unit is mainly used for calibrating the charging time measurement unit, the capacitor is charged by using the constant current source twice, the deviation is calculated, and the deviation is utilized for calibration.
Optionally, the system further comprises an alarm unit, and the alarm unit is connected with the control unit.
Alternatively, the alarm unit may be an audible alarm unit or an indicator light alarm unit.
Here, the alarm unit that this application embodiment provided can report to the police to the gas velocity of flow, if the gas velocity of flow is in unusual within range, is reporting to the police to prevent economic loss and the potential safety hazard that the gas velocity of flow is unusual to cause, improved the security that the gas used.
It is to be understood that the abnormal ranges herein may be determined according to practical circumstances, and the application is not particularly limited thereto.
Optionally, the system further comprises a display unit, and the display unit is connected with the control unit.
Here, the display element that this application embodiment provided can show the gas velocity of flow that detects to show the gas velocity of flow in real time, the user of being convenient for knows the gas situation, has improved the user experience that the gas detected, also can let the user adjust the gas to real-time data, has also improved the security that the gas was used.
Optionally, the ultrasonic wave trigger unit is further included;
one end of the ultrasonic trigger unit is connected with the control unit, and the other end of the ultrasonic trigger unit is respectively connected with the first ultrasonic unit and the second ultrasonic unit and used for sending trigger signals to the first ultrasonic unit and the second ultrasonic unit according to instructions of the control unit.
Here, the embodiment of the present application further includes an ultrasonic trigger unit, and the ultrasonic trigger unit may send trigger signals to the first ultrasonic unit and the second ultrasonic unit according to a control signal of the control unit, so that ultrasonic waves are emitted to the first ultrasonic unit and the second ultrasonic unit for gas detection.
The gas detection equipment of the embodiment of the application consists of a control unit, a measuring unit, a first ultrasonic unit, a second ultrasonic unit, a signal processing unit, a calculating unit and a switching unit, wherein, the gas detection device of the embodiment of the application also comprises a switching unit on the basis of the existing gas unit, one end of the switching unit is connected with the signal processing unit, the other end is respectively connected with the first ultrasonic unit and the second ultrasonic unit, the switching unit can connect the signal processing unit with the first ultrasonic unit, or the signal processing unit is connected with the second ultrasonic unit, so that the ultrasonic signals of the two branches do not need to be independently provided with the independent signal processing unit, on one hand, the cost of redundant parts is saved, on the other hand, the influence of measurement errors caused by inconsistent devices is avoided, and the accuracy of gas detection is further improved.
In one possible implementation, the calculation unit and the measurement unit are arranged within the control unit. Correspondingly, fig. 2 is a schematic structural diagram of another gas detection device provided in an embodiment of the present application, and as shown in fig. 2, the gas detection device includes: a control unit 101, a measurement unit 102, a first ultrasonic unit 103, a second ultrasonic unit 104, a signal processing unit 105, a calculation unit 106, and a switching unit 108, the calculation unit 106 and the measurement unit 102 being provided inside the control unit.
Here, in the embodiment of the present application, the calculating unit and the measuring unit are disposed inside the control unit, and the internal capacitor may be charged by using the constant current source inside the control unit, so as to reduce interference of an external environment on devices such as the calculating unit and the measuring unit in the gas detection device, such as radio frequency interference, external noise, and the like, and further improve accuracy of gas detection.
In a possible implementation manner, a signal processing unit in the gas detection device provided in the embodiment of the present application includes an amplifying circuit, a filtering circuit, and a zero-crossing detection circuit, and accordingly, fig. 3 is a schematic structural diagram of another gas detection apparatus provided in the embodiment of the present application, and as shown in fig. 3, the gas detection apparatus includes: the ultrasonic diagnostic apparatus comprises a control unit 101, a measurement unit 102, a first ultrasonic unit 103, a second ultrasonic unit 104, a signal processing unit 105, a calculation unit 106 and a switching unit 108, wherein the signal processing unit 105 specifically comprises an amplification circuit 1051, a filter circuit 1052 and a zero-crossing detection circuit 1053.
The amplifying circuit 1051 is connected to the filter circuit 1052, and the filter circuit 1052 is connected to the zero-crossing detecting circuit 1053, it can be understood that the connection order of the amplifying circuit, the filter circuit, and the zero-crossing detecting circuit can be determined according to the actual situation, and the types of the amplifying circuit, the filter circuit, and the zero-crossing detecting circuit are not particularly limited in this application.
The amplifying circuit is used for carrying out signal amplification processing on the received ultrasonic signals.
The filter circuit is used for filtering interference signals in the ultrasonic signals.
The zero-crossing detection circuit is used for controlling the output power of the processed signal and can also be used for detecting the period time of the ultrasonic signal to realize the calibration synchronization function.
Here, the signal processing unit provided in the embodiment of the present application may include an amplifying circuit, a filtering circuit, and a zero-crossing detection circuit, and may amplify, filter, and power control the ultrasonic signal sent by the receiving end, and the processed signal filters out invalid and redundant signals, and amplifies the signal, so that the measuring unit performs a sampling test on the processed ultrasonic signal, calculates an accurate ultrasonic transmission time difference, and further improves the accuracy of gas detection.
Fig. 4 is a schematic structural diagram of another gas detection device provided in an embodiment of the present application, and as shown in fig. 4, the gas detection device includes:
the ultrasonic diagnostic apparatus specifically comprises a control unit 101, a charging time measuring unit 1020, a first ultrasonic unit 103, a second ultrasonic unit 104, a signal processing unit 105, a calculating unit 106, a switching unit 107 and an ultrasonic triggering unit 401, wherein the signal processing unit 105 specifically comprises an amplifying circuit 1051, a filter circuit 1052 and a zero-crossing detecting circuit 1053.
The control unit 101 is connected to the charging time measuring unit 1020, the first ultrasonic unit 103, the second ultrasonic unit 104, the signal processing unit 105, and the calculation unit 106, respectively.
The first ultrasonic unit 103 and the second ultrasonic unit 104 are respectively arranged at the upstream and downstream of the gas pipeline 107, the first ultrasonic unit 103 and the second ultrasonic unit 104 are further connected with the signal processing unit 105, one end of the switching unit 201 is connected with the signal processing unit 105, the other end is respectively connected with the first ultrasonic unit 103 and the second ultrasonic unit 104, one end of the ultrasonic trigger unit 401 is connected with the control unit 101, and the other end is respectively connected with the first ultrasonic unit 103 and the second ultrasonic unit 104.
The embodiment of the application also provides a gas system, which comprises a gas pipe and the gas detection equipment in the embodiment.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (11)
1. The gas detection equipment is characterized by comprising a control unit, a measuring unit, a first ultrasonic unit, a second ultrasonic unit, a signal processing unit, a calculating unit and a switching unit, wherein the control unit is respectively connected with the measuring unit, the first ultrasonic unit, the second ultrasonic unit, the signal processing unit and the calculating unit; one end of the switching unit is connected with the signal processing unit, and the other end of the switching unit is respectively connected with the first ultrasonic unit and the second ultrasonic unit; the first ultrasonic unit and the second ultrasonic unit are respectively arranged on the upstream and the downstream of the gas pipeline;
the switching unit is used for realizing the transmission of ultrasonic waves through the first ultrasonic unit, the reception of the ultrasonic waves through the second ultrasonic unit or the transmission of the ultrasonic waves through the second ultrasonic unit and the reception of the ultrasonic waves through the first ultrasonic unit, the control unit controls the first ultrasonic unit and the second ultrasonic unit to transmit and receive ultrasonic signals, sends the received ultrasonic signals to the signal processing unit and sends the processed signals to the control unit; the control unit sends the processed signals to the measuring unit and the calculating unit so that the measuring unit and the calculating unit calculate the gas flow rate.
2. The gas detection apparatus of claim 1, wherein the measurement unit is a charge time measurement unit.
3. The gas detection apparatus of claim 1, wherein the calculation unit comprises a timing unit and a comparison unit;
the timing unit is connected with the comparison unit, and the timing unit and the comparison unit are respectively connected with the control unit;
the timing unit is used for providing a clock signal for the control unit;
the comparison unit is used for providing effective calculation data for the control unit.
4. The gas detection apparatus of claim 1, further comprising an ultrasonic trigger unit;
one end of the ultrasonic trigger unit is connected with the control unit, and the other end of the ultrasonic trigger unit is respectively connected with the first ultrasonic unit and the second ultrasonic unit and used for sending trigger signals to the first ultrasonic unit and the second ultrasonic unit according to instructions of the control unit.
5. The gas detection apparatus of claim 2, further comprising a calibration unit;
the calibration unit is connected with the charging time measuring unit and used for calibrating the charging time measuring unit.
6. The gas detection device according to any one of claims 1 to 5, wherein the signal processing unit is an amplifying circuit;
one end of the amplifying circuit is connected with the first ultrasonic unit and the second ultrasonic unit respectively, and the other end of the amplifying circuit is connected with the control unit;
the amplifying circuit is used for carrying out signal amplification processing on the received ultrasonic signals.
7. The gas detection device according to any one of claims 1 to 5, wherein the signal processing unit is a filter circuit;
one end of the filter circuit is connected with the first ultrasonic unit and the second ultrasonic unit respectively, and the other end of the filter circuit is connected with the control unit;
the filter circuit is used for filtering interference signals in the ultrasonic signals.
8. The gas detection apparatus according to any one of claims 1 to 5, wherein the signal processing unit is a zero-crossing detection circuit;
one end of the zero-crossing detection circuit is connected with the first ultrasonic unit and the second ultrasonic unit respectively, and the other end of the zero-crossing detection circuit is connected with the control unit;
the zero-crossing detection circuit is used for controlling the output power of the processed signal.
9. The gas detection device according to any one of claims 1 to 5, further comprising an alarm unit connected to the control unit.
10. The gas detection apparatus according to any one of claims 1 to 5, characterized in that the calculation unit and the measurement unit are provided inside the control unit.
11. A gas system comprising a gas pipe and a gas sensing device as claimed in any one of claims 1 to 10 mounted on the gas pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120016427.6U CN214473455U (en) | 2021-01-04 | 2021-01-04 | Gas check out test set and gas system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120016427.6U CN214473455U (en) | 2021-01-04 | 2021-01-04 | Gas check out test set and gas system |
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| CN214473455U true CN214473455U (en) | 2021-10-22 |
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| CN202120016427.6U Active CN214473455U (en) | 2021-01-04 | 2021-01-04 | Gas check out test set and gas system |
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2021
- 2021-01-04 CN CN202120016427.6U patent/CN214473455U/en active Active
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