WO2021238137A1 - 一种无磁计量装置、计量方法和流体计量设备 - Google Patents

一种无磁计量装置、计量方法和流体计量设备 Download PDF

Info

Publication number
WO2021238137A1
WO2021238137A1 PCT/CN2020/133765 CN2020133765W WO2021238137A1 WO 2021238137 A1 WO2021238137 A1 WO 2021238137A1 CN 2020133765 W CN2020133765 W CN 2020133765W WO 2021238137 A1 WO2021238137 A1 WO 2021238137A1
Authority
WO
WIPO (PCT)
Prior art keywords
metering
magnetic
coil
coils
processor
Prior art date
Application number
PCT/CN2020/133765
Other languages
English (en)
French (fr)
Inventor
朱林海
罗军
戴坡
孙标
Original Assignee
湖南威铭能源科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 湖南威铭能源科技有限公司 filed Critical 湖南威铭能源科技有限公司
Publication of WO2021238137A1 publication Critical patent/WO2021238137A1/zh

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
    • G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
    • G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
    • G01F1/586—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters constructions of coils, magnetic circuits, accessories therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
    • G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
    • G01F1/588—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters combined constructions of electrodes, coils or magnetic circuits, accessories therefor

Definitions

  • the invention relates to the field of fluid metering, and in particular to a non-magnetic metering device, a metering method and a fluid metering device.
  • the fluid when detecting the flow rate or flow rate of a fluid such as a liquid or gas, the fluid drives the mechanical part to rotate, and the flow rate or flow rate of the liquid or gas is calculated by the rotation of the mechanical part.
  • Existing fluid measurement technologies include magnetic sensing technology, LC oscillation excitation non-magnetic measurement technology, single-primary coil excitation multi-stage coil induction non-magnetic measurement technology, and multi-coil direct excitation non-magnetic measurement technology.
  • the mainstream fluid metering method is magnetic metering, and most of the sensors use reed switches and Hall elements. These types of sensors have magnetic characteristics and emit pulse signals under the action of a magnetic field, but they all have obvious shortcomings.
  • the reed switch is packaged in glass, which will burst in areas with large weather and temperature differences and during transportation.
  • the reed switch cannot be used as a high-precision measurement; the Hall element is a moisture-sensitive device, which is easily affected by humidity.
  • the static current of the device is too large, causing the battery of the metering equipment to be consumed in advance; these types of magnetic sensors also have a common shortcoming.
  • the proximity of the magnet will cause metering problems.
  • the user simulates the metering process, which will counteract the metering pulse, which cannot be avoided.
  • the interference of the magnetic field A device based on magnetic measurement has a permanent magnet in a rotating position. When the magnetic sensor passes near the magnet, it will act, but it is susceptible to external magnetic interference and cause measurement errors.
  • Non-magnetic metering can achieve metering without magnet triggering, and has high stability, high precision and strong anti-interference ability, which has gradually replaced magnetic metering.
  • the current sensor based on LC oscillation uses a metalized disk in the rotating part. The damping will change when it is close to the disk. The pulse is output through the comparator.
  • the LC excitation method requires high inductance and increases the distance.
  • the inductance value is required to be large, but there is an iron core in the middle of the large inductance, which is greatly affected by strong magnetism, and the air-core inductance will cause weak energy, insufficient distance, and poor practical application; the LC oscillation method has no Magnetic measurement is limited to distance reasons and requires iron core inductance.
  • the iron core is affected by strong magnetism and affects the inductance effect. Therefore, it does not really get rid of the interference of the magnet.
  • the reverse magnetic field caused by the eddy current affects the primary coil No longer at the same level, even if it is amplified, the excitation signal will be amplified by the same multiple at the same time.
  • the changes caused by the eddy current are difficult to extract from the excitation source signal, which has a greater impact on the measurement.
  • the patent document with the patent number ZL200680007522.8 discloses the invention patent of the inductive angular position sensor, which belongs to the technical solution of single primary coil and multi-stage coil.
  • This solution solves the problem that traditional magnetic sensors are easily interfered by permanent magnets.
  • this invention uses a single primary coil for excitation and 4 secondary coils for induction. According to the law of conservation of energy, the energy obtained by each secondary coil is actually less than 1/4, and the technical solution directly uses a comparator for comparison. When the distance is a little far away, the input voltage difference of the comparator is particularly small, and the comparator has a hysteresis voltage (a dozen mV). Due to this voltage range, it is easy to cause the output of the comparator to be unstable and affect the measurement.
  • the existing fluid metering technology has shortcomings and needs to be improved and improved.
  • the purpose of the present invention is to provide a non-magnetic metering device, a metering method and a fluid metering device, which use multiple primary coils for excitation and multiple secondary coils for induction, wherein the primary coils are respectively tangent , Concentric ring arrangement, each primary coil contains a concentric secondary coil, which can overcome the shortcomings of direct excitation mode and avoid the impact of insufficient excitation energy.
  • a non-magnetic measurement device including a measurement part and a detection part
  • the metering unit includes three or more primary coils, the same number of secondary coils as the primary coils, a partially metalized disk, and a shaft installed at the center of the partially metalized disk; a single secondary coil
  • the primary coil is built in a single primary coil, and is installed concentrically and in the same plane to form a single coil assembly that is inductively coupled; three or more of the formed coil assemblies are installed in the same plane around the axis;
  • the detection unit has an excitation module, a detection module, and a metering processor; the excitation module is connected to all the primary coils and simultaneously connected to the metering processor; the detection module is connected to all the stimulation coils separately Connected to the metering processor at the same time.
  • all the secondary coils are connected in parallel with each other, and then respectively connected with the detection module.
  • the detection module includes an amplifying circuit and a sampling circuit
  • the discharging circuit includes a plurality of amplifiers
  • the sampling circuit includes a plurality of samplers; one end of the amplifier and the secondary The coil is connected, and the other end is connected to the measurement processor through a sampler.
  • the metering processor has a plurality of ADC detection channels; each of the samplers is connected to one of the ADC detection channels.
  • the detection unit further includes a discharge control module, which is connected to the metering processor; and a plurality of the amplifiers are also respectively connected to the discharge control module.
  • all the primary coils have the same size; all the secondary coils have the same size.
  • the metalized part of the partially metalized disc occupies 1/n or (n-1)/n of the total; n is the number of the primary coils.
  • the number of the primary coil and the secondary coil is three.
  • a non-magnetic measurement method used in the non-magnetic measurement device including the steps:
  • the metering processor drives the excitation module to sequentially excite all primary coils in a predetermined sequence, and at the same time drives the detection module to sequentially detect all secondary coils in a predetermined sequence, and transmits the detected voltage value to all primary coils.
  • the measurement processor drives the excitation module to sequentially excite all primary coils in a predetermined sequence, and at the same time drives the detection module to sequentially detect all secondary coils in a predetermined sequence, and transmits the detected voltage value to all primary coils.
  • the metering processor sequentially identifies the detected voltage value of each secondary coil, if it is greater than or equal to the first predetermined pressure value, it is recorded as pressure value state 1; if it is less than or equal to the second predetermined pressure value, then Denoted as pressure value state 0; arrange the pressure value states of each secondary coil in the predetermined order to obtain a pressure value state number sequence;
  • the metering processor determines whether the pressure value state series is a predetermined series, and if so, the circle value is accumulated by 1; otherwise, step S1 is executed.
  • a fluid metering device includes the non-magnetic metering device.
  • the non-magnetic metering device, metering method and fluid metering equipment provided by the present invention have the following beneficial effects:
  • each primary coil contains a secondary coil, and the remaining energy after removing the metal eddy current loss is basically received by the concentrically arranged secondary coils, which improves the energy utilization rate and reduces the measurement error;
  • the present invention can increase the energy of the excitation source and increase the receiving area of the secondary coil to increase the sensing distance;
  • the secondary coil of the present invention is a complete circle in the primary coil.
  • the accuracy of sensing is higher, the receiving area is larger in the same utilization space, and the sensing can be increased at the same time distance;
  • the present invention uses the ADC detection channel to detect the induced voltage of the secondary coil, and directly samples the adjusted voltage value.
  • the ADC detection channel in the metering processor has a general conversion accuracy of up to 12 bits. If the oversampling technology is used, the conversion The accuracy can reach 16 bits. In this way, in the long-distance situation, although the induced current is weak and the signal after amplification is not large, it can still be distinguished after ADC conversion.
  • Figure 1 is a schematic diagram of the structure of a non-magnetic metering device provided by the present invention
  • Figure 2 is a schematic diagram of the relative position between a partially metalized disc and a PCB in the non-magnetic metering device provided by the present invention
  • FIG. 3 is a schematic diagram of the installation structure of the coil assembly in the non-magnetic metering device provided by the present invention.
  • Figure 4 is a circuit diagram of the principle of non-magnetic metering provided by the present invention.
  • Fig. 5 is a change diagram of the numerical sequence of the downward pressure value state of the partial metalized disc rotating clockwise according to the present invention
  • Fig. 6 is a change diagram of the numerical sequence of the depression value state of a partially metalized disc rotating counterclockwise provided by the present invention.
  • the present invention provides a non-magnetic metering device, including a metering part and a detecting part;
  • the metering section includes three or more primary coils 1/2/3, the same number of secondary coils 4/5/6 as the primary coil 1/2/3, and a partially metalized circle
  • the disk 9 and the axis A installed at the center of the partially metalized disk 9;
  • the single secondary coil 4/5/6 is built in the single primary coil 1/2/3, and is concentric and coplanar Installed to form a single coil assembly that is inductively coupled;
  • three or more formed coil assemblies are installed on the same plane around the axis A;
  • the detection unit has an excitation module 11, a detection module (not labeled), and a measurement processor 14;
  • the metering processor 14 is connected; the detection module is connected to all the stimulation coils separately, and is connected to the metering processor 14 at the same time.
  • the partially metalized disc 9 rotates around the axis A.
  • the axis A rotates to drive the partially metalized disc 9 to rotate.
  • the part of the metalized disc 9 is rotated so that the rotation here can be in the direction 7 (clockwise) or in the direction 8 (counterclockwise).
  • a plurality of the primary coils 1/2/3 are installed tangentially between two adjacent ones, and at the same time, the tangents of all the tangent points are at the center of the axis A.
  • the installation form is a balanced form, that is, the figure obtained by connecting the center points of a plurality of the primary coils 1/2/3 is a regular polygon, such as a regular triangle or a square; each primary coil 1/2/3 matches one time
  • the primary coil 4/5/6 In this embodiment, the primary coil 1 matches the secondary coil 4, the primary coil 2 matches the secondary coil 5, the primary coil 3 matches the secondary coil 6, and all the primary coils 1 /2/3 is the same size, the secondary coil 4/5/6 is the same size, the primary coils 1/2/3 are not arranged in pairs with each other, the primary coil 1/2/3 and the matching secondary coil 4/5/ 6 has a common circle center, and the primary coil 1/2/3 is inductively coupled with the secondary coil 4/5/6.
  • the metalized part of the partially metalized disc 9 is continuous, and the metal material of the metalized part is the same, such as copper, iron, etc.; please refer to Figures 2 and 3 together,
  • the detection unit has a PCB board 10, and the coil assembly is installed on the PCB board 10 according to its shape; the excitation module 11, the detection module and the metrology processor 14 are all installed on the PCB Board 10 on.
  • the primary coil 1/2/3 and the secondary coil 4/5/6 are arranged on the PCB board 10, and the PCB board 10 is fixed on the base table or the structural part, which is equivalent to the stator.
  • the primary coil 1 /2/3 is equivalent to a fixed position.
  • the partially metalized disc 9 is installed in a position corresponding to the coil assembly according to the general usage in this field, which is equivalent to a rotor.
  • the working principle of the non-magnetic metering device is: the primary coil 1/2/3 will generate an excitation magnetic field under the action of the excitation circuit, the excitation magnetic field passes through the corresponding secondary coil 4/5/6, and the excitation magnetic field It will also reach the metalized disk and produce eddy current effect on the metalized disk.
  • the eddy current will generate a magnetic field opposite to the excitation magnetic field.
  • the secondary coil 4/5/6 will get the sum of the excitation magnetic field and the magnetic field generated by the eddy current. It is a composite magnetic field. According to the change of the magnetic field, the induced current will change, the discharge current will be different, and the sampled voltage will change. According to the voltage change, each secondary coil corresponding sample has a maximum voltage.
  • the partially metalized disk 9 has a part of metal, so it can be realized in different positions during the rotation process, and the voltage detected by each secondary coil is different, so as to realize the determination of the The position of the partially metalized disc 9 is then measured.
  • the detected voltage value is greater than a certain threshold, it can be considered as the maximum voltage value, and as long as it is less than a certain threshold, it can be considered as the minimum voltage value.
  • the selection of the threshold may use a method commonly used in the art, and it is not limited. Due to the limited structure of the non-magnetic metering device, there is a certain distance between the coil and the metal disc.
  • the present invention can increase the energy of the excitation source and increase the receiving area of the secondary coil to achieve an increase in the sensing distance; at the same time, the secondary of the present invention
  • the coil is a complete circle in the primary coil, and when used in conjunction with the partially metalized disc, the sensing accuracy is higher, the receiving area is larger in the same used space, and the sensing distance can be increased at the same time.
  • the general sensing distance of the non-magnetic measurement device in the prior art is 7-9mm, and it cannot be detected if it is far away, or the detection accuracy is extremely low.
  • the sensing distance of the non-magnetic measurement device provided by the present invention Can reach 10-12mm, or even higher, in actual use, it can be more flexible.
  • L1, L2, and L3 represent the primary coil 1/2/3 respectively
  • L4, L5, and L6 represent the secondary coil 4/5/6 respectively.
  • all the secondary coils 4/5/6 are connected in parallel with each other, and then connected with each other respectively.
  • the detection module is connected. In this way, the error can be greatly reduced during detection.
  • the parallel state described here is that one of the two output terminals of each secondary coil (for details, please refer to the upper and lower output terminals of L4/L5/L6 in Figure 4), one output terminal is connected together, and the other The output terminal is connected with the detection module, and when the primary coil is excited, the potentials of the multiple secondary coils are the same.
  • the detection module includes an amplifier circuit 12 and a sampling circuit 13, the discharge circuit includes a plurality of amplifiers V25/V26/V27, the sampling circuit 13 includes a plurality of samplers; the amplifier One end is connected to the secondary coil, and the other end is connected to the metering processor 14 through a sampler.
  • the amplifier is a triode; the sampler is a capacitor C1/C2/C3.
  • the metering processor 14 has multiple ADC (analog to digital converter) detection channels 15; each of the samplers is connected to one ADC detection channel 15.
  • ADC analog to digital converter
  • the metering processor 14 is an MCU (Microcontroller Unit) commonly used in the field, and the ADC detection channel conversion accuracy is generally 12 bits. If oversampling technology is used, it can be The conversion accuracy is 16 bits, and the detection accuracy is extremely high, which can effectively ensure the accuracy of measurement. Even at a long distance (the distance between the partially metalized disk and the secondary coil), although the induced current is weak, The signal is not big after amplification, but it can still be distinguished after ADC conversion.
  • the detection unit further includes a discharge control module 16, which is connected to the metering processor 14; a plurality of the amplifiers are also connected to the discharge control module 16 respectively .
  • all the primary coils 1/2/3 have the same size; all the secondary coils 4/5/6 have the same size.
  • the metalized part of the partially metalized disk 9 accounts for 1/n or (n-1)/n of the total; n is the number of the primary coils.
  • the metalized part of the partially metalized disc 9 can also be 1/n, 2/n, ... (n-2)/n, (n-1)/n; the judgment principles are the same, so I won’t repeat them. .
  • the number of the primary coil and the secondary coil is three.
  • the excitation electrical module 11 is a driving circuit of the primary coil, responsible for generating an excitation magnetic field by the primary coil, and the excitation circuit can be switched to act on multiple primary coils respectively, or simultaneously excite, depending on the implementation mode.
  • the excitation module 11 is a commonly used excitation module 11 in the field, and is not limited; where L1, L2, and L3 represent the primary coil 1/2/3 respectively, and L4, L5, and L6 represent the secondary coil 4 respectively /5/6, the resistors R1/R2/R3 are grounded to provide a reference voltage (base level b) of the amplifying circuit 12 to facilitate the conduction of the amplifying tube.
  • the amplifying circuit 12 amplifies the weak induced current of the secondary coil 4/5/6, and after amplifying, the sampling circuit 13 performs voltage sampling.
  • the sampling circuit 13 configures a capacitor C1/C2/C3 for each amplifier Because the capacitor C1/C2/C3 has a voltage holding function, it will not cause changes to the sudden change signal and is not easily affected by instantaneous interference.
  • the capacitor C1/C2/C3 is selected as the sampling device, and the capacitor C1/C2/C3
  • the capacitance values are the same, and the temperature coefficient is better (specifically subject to on-site implementation, not limited)
  • resistors R4/R5/R6 are the charging current-limiting resistors of capacitors C1/C2/C3, where the resistors of R4/R5/R6
  • the resistance values are equal, and the temperature coefficient is good (specifically subject to on-site implementation, not limited); after the sampling circuit 13 is processed, it is converted by the ADC detection channel 15 inside the metering processor 14, and the metering processor 14 controls at the same time With the discharge control module 16, it is possible to select which way to discharge.
  • the excitation module 11 can simultaneously excite the three primary coils.
  • the transmission control module is controlled to achieve separate detection and discharge
  • the metering processor 14 also controls the excitation module 11, which can individually select a primary coil for excitation. Since the excitation period is at the ms level and the action time is at the ns level, which is far greater than the mechanical part of the measuring instrument speed, the actions can be carried out in time sharing or at the same time, and the result will not change much.
  • the excitation module 11 drives the primary coil 1/2/3, the primary coil 1/2/3 generates an excitation magnetic field, and the excitation magnetic field passes through the corresponding secondary coil 4/5/6 (4, 5, 6), Among them, the primary coil 1 and the secondary coil 4, the primary coil 2 and the secondary coil 5, and the primary coil 3 and the secondary coil 6 correspond one-to-one.
  • the metal part on the disk produces an eddy current effect.
  • the eddy current will generate a magnetic field opposite to the excitation magnetic field.
  • the secondary coil 4/5/6 will get the sum of the excitation magnetic field and the eddy current generated magnetic field, that is, the composite magnetic field, according to the change of the magnetic field. It will cause the change of the induced current.
  • the amplifying circuit 12 After the amplifying circuit 12 amplifies the induced current of the secondary coil 4/5/6, the amplified induced current becomes the discharge current of the capacitors C1, C2, C3 in the sampling circuit 13. When the disc passes through different positions, it will cause changes in the induced current, which will cause the discharge currents of C1, C2, and C3 to be different.
  • the discharge time of the discharge control circuit is required to control the same. Therefore, the voltage of C1, C2, C3 under the same discharge time It is not the same.
  • the conversion is carried out through the ADC detection channel 15 inside the metering processor 14 to obtain different voltage values. The detected voltage value will show periodic changes).
  • the present invention also provides a non-magnetic measurement method, including the steps:
  • the metering processor 14 drives the excitation module 11 to sequentially energize all primary coils 1/2/3 in a predetermined order, and at the same time drives the detection module to sequentially energize all secondary coils 4/5/ in a predetermined order.
  • 6 Perform detection and send the detected voltage value to the measurement processor 14; here, it should be noted that the time for each excitation of the primary coil is a common time in the field, and there is no limitation. Limited; the time of each excitation is ns level, and the time interval between two excitations is 10-30ms;
  • the metering processor 14 sequentially identifies the detected voltage value of each secondary coil 4/5/6, and if it is greater than or equal to the first predetermined voltage value, it is recorded as the voltage value state 1; if it is less than or equal to the first predetermined voltage value, Second, the predetermined pressure value is recorded as pressure value state 0; the pressure value states of each secondary coil 4/5/6 are arranged according to the predetermined sequence to obtain a pressure value state series;
  • the metering processor 14 determines whether the pressure value state number sequence is a predetermined number sequence, and if so, the circle value is accumulated by 1; otherwise, step S1 is executed.
  • the metering processor 14 drives the excitation module 11 to excite the primary coil 1, the primary coil 2, and the primary coil 3 in a time-division manner, that is, the excitation is performed in the order of the primary coils 1-3.
  • the primary coil 1 generates an excitation magnetic field that passes through the secondary coil 4.
  • the discharge control module 16 is turned on. The discharge timing requires that the discharge time of each coil is the same.
  • the excitation magnetic field passes through the metalized disk, and a reverse magnetic field is generated due to the eddy current effect. Passing through the secondary coil 4, the composite magnetic field of the secondary coil 4 is reduced, and the induced current is reduced. After processing by the amplifier V25/V26/V27, the corresponding amplified current is also correspondingly reduced, so that the capacitor C1 is discharged at equal The voltage reaches the maximum during the time. After ADC processing, the binary value is obtained and converted into a floating point number, where it is recorded as V4max (the detected voltage value is greater than the first predetermined voltage value), and the master record state is 1; then the primary coil is excited 2.
  • the excitation magnetic field passes through the metalized disk to produce a very weak reverse magnetic field that passes through the secondary coil 5. Because the metal part of the partially metalized disk 9 is completely absent from the secondary coil 5 The corresponding position of the composite magnetic field is basically equal to the excitation magnetic field. At this time, the induced current reaches the maximum value, the corresponding amplified discharge current is the maximum, and the voltage of the corresponding capacitor C2 reaches the minimum value.
  • the binary is converted into a floating point number and recorded as V5min( The detected voltage value is less than the second predetermined voltage value), the recording state is 0; the primary coil 3 is excited again to generate an excitation magnetic field passing through the secondary coil 6, because the metal of the metalized disk completely covers the secondary coil 6 , After the excitation magnetic field reaches the metal, a magnetic field that passes through the secondary coil 6 in the opposite direction is generated, which causes the composite magnetic field of the secondary coil 6 to decrease, resulting in a decrease in the induced current.
  • the partially metalized disc 9 is rotated 120 degrees clockwise around the axis A.
  • the metal part of the partially metalized disc 9 passes directly under the secondary coils 5 and 6, and firstly excites the primary coil 1 to produce a penetration
  • the composite magnetic field of the secondary coil 4 is basically equal to the excitation magnetic field.
  • the induced current obtained by the secondary coil 4 is the largest, the corresponding amplified discharge current is the largest, and the voltage on the capacitor C1 reaches the minimum value.
  • the converted floating point number is recorded as V4min, and the status of the master record is 0; then Excite the primary coil 2, because the metalized disk completely passes under the secondary coil 5, the composite magnetic field is reduced, the induced current is reduced, and the corresponding amplified discharge current becomes smaller, and the voltage on the capacitor C2 reaches the maximum after being discharged.
  • the binary is converted to floating point number. Here it is recorded as V5max, and the master record status is 1.
  • C3 reaches the maximum value after discharge.
  • the binary is converted to a floating point number. Here it is recorded as V6max, and the master record status is 1;
  • the pressure value state number sequence is obtained, it is arranged as 011 in the order of 4/5/6 of the secondary coil;
  • the partially metalized disc 9 is again rotated 120 degrees clockwise around the axis A. At this time, the metal part of the partially metalized disc 9 has just passed the secondary coils 4 and 5, and the primary coil 1 is first excited. The excitation magnetic field passing through the secondary coil 4 is generated, and at the same time, the excitation magnetic field will also reach the metal part of the partially metalized disc 9.
  • the reverse magnetic field is generated by the eddy current, which reduces the composite magnetic field of the secondary coil 4, resulting in secondary
  • the induced current of the level coil 4 decreases, and the corresponding discharge current decreases.
  • the value of C1 on the capacitor reaches the maximum value after discharge.
  • the binary After ADC processing, the binary is converted to a floating point number and recorded as V4max, and the master record status is 1; then excitation
  • the primary coil 2 generates an excitation magnetic field that passes through the secondary coil 5.
  • the excitation magnetic field will also reach the metal part of the disc.
  • the eddy current generates a reverse magnetic field, which reduces the composite magnetic field of the secondary coil 4, resulting in the secondary coil
  • the induced current of 4 decreases, and the corresponding discharge current decreases.
  • the value of C2 on the capacitor reaches the maximum value after discharge.
  • the binary and floating point number is recorded as V5max, and the master record status is 1; the primary coil is excited again 3. Generate an excitation magnetic field that passes through the secondary coil 6.
  • the composite magnetic field is basically equal to the excitation magnetic field, resulting in an increase in the induced current of the secondary coil 6, and the corresponding amplification
  • the discharge current of the capacitor C3 increases, and the voltage of the capacitor C3 reaches the minimum value after being discharged. It is converted into binary by ADC, and the binary is further converted into a floating point number.
  • the record is V6min, and the master record state is 0; at this time, the obtained voltage value state series It is arranged as 110 in the order of 4/5/6 of the secondary coil;
  • the partially metalized disc 9 is again rotated clockwise by 120 degrees around the axis A.
  • the metalized part of the partially metalized disc 9 passes through the secondary coils 4 and 6, and returns to step one.
  • the pressure value state number sequence is arranged as 101 in the order of 4/5/6 of the secondary coil, and the non-magnetic metering device selects one circle to complete. It is calculated that when the partially metalized disc 9 is rotating in a clockwise state, the pressure value state series are 101, 011, and 110 state changes, as shown in FIG. 5. If so, the partially metalized disc 9 rotates counterclockwise, and the operation is basically the same, except that the direction of rotation is different. Therefore, the process will not be described here.
  • the pressure value status series are 101, 110, 011 status changes, see Figure 6 for details.
  • the pressure value state number sequence is 100, 010, and 001 morphological changes, and the principle is as described above.
  • the present invention also provides a fluid metering device, including the non-magnetic metering device.
  • the fluid metering equipment includes a water meter, a gas meter, etc., wherein the metering process is as described above, and at the same time, the volume calculation of water or gas is also a common technical means used in the art, and will not be repeated here.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

一种无磁计量装置、计量方法和流体计量设备，其中无磁计量装置包括计量部和检测部；计量部包括三个或以上的初级线圈（1、2、3）、与初级线圈（1、2、3）数量相同的次级线圈（4、5、6）、部分金属化圆盘（9）以及穿过部分金属化圆盘（9）中心的轴（A）；单个次级线圈（4、5、6）内置在单个初级线圈（1、2、3）中，并同心、同平面装设，形成电感耦合的单一线圈组件；形成的三个或以上线圈组件绕轴（A）同平面装设；检测部具有激励模块（11）、检测模块和计量处理器（14）；激励模块（11）与所有的初级线圈（1、2、3）分别连接，同时与计量处理器（14）连接。每一个初级线圈（1、2、3）里面含有一个次级线圈（4、5、6），除去金属涡电流损耗剩余的能量基本被同心布置的次级线圈（4、5、6）接收，提高了能量的利用率，误差小。

Description

一种无磁计量装置、计量方法和流体计量设备 技术领域
本发明涉及流体计量领域，尤其涉及一种无磁计量装置、计量方法和流体计量设备。
背景技术
目前检测流体如液体或气体的流速或流量时，是通过流体推动机械部分转动，通过机械部件的转动来计算液体或气体的流速或流量。
现有流体计量技术包括磁传感技术、LC振荡激励无磁计量技术、单初级线圈激励多次级线圈感应式无磁计量技术、多线圈直接激励无磁计量技术。其中，主流的流体计量方式是磁性计量，传感器大多采用干簧管、霍尔元件，这几种传感器都有带有磁的特性，在磁场作用下发出脉冲信号，但是都有着较为明显的缺点，例如干簧管是玻璃封装，在天气温差大的区域和运输途中会爆裂现象，干簧管由于动作次数有限，不能作为高精度的计量；霍尔元件是潮敏器件，容易受湿度的影响，导致器件静态电流偏大，引起计量设备的电池被提前消耗；这几种磁性传感器还有一个共同的缺点，磁铁靠近会导致计量出现问题，用户模拟计量过程，会反向抵消计量脉冲，无法避免磁场的干扰。基于磁性计量的装置，其永磁铁处于旋转位置，当磁性传感器经过磁铁附近，会动作，但是容易受外界磁性干扰，引起计量出错。
而无磁计量不需要磁铁触发就可实现计量，且拥有较高的稳定性，高精度和较强的抗干扰的能力，已经慢慢的替代了磁性计量。但是，目前基于LC振荡的传感器，旋转部分采用的是金属化圆盘，靠近该圆盘，阻尼会发生变化，通过比较器输出脉冲，LC激励这种方式对电感的要求很高，在增加距离的条件下，电感要求电感值要大，但是大的电感中间有铁芯，受强磁影响很大，而空心电感又会导致能量很弱，距离不够，实际应用很差；LC振荡方式的无磁计量限于距离原因，需采用铁芯电感，铁芯受强磁影响，影响电感效应，因此没有真正摆脱磁铁的干扰，只是磁计量技术与无磁计量技术的一个过渡技术；单初级线圈激励多次级线圈感应，由于多级次级线圈对能量的均衡作用，导致能量很少，且方案中未对微弱信号进行调理，直接采用比较器，只能适应近距离的无磁计量；多线圈直接激励无磁技术，没有次级线圈，但是涡电流产生的反向磁场对直接激励的初级线圈的磁场影响太小，由于初级线圈激励的能量强，涡电流引起的反向磁场对初级线圈的影响不再一个量的级别，就算放大，激励信号会同时同倍数放大，涡电流引起的变化很难从激励源信号中提取，对计量影响较大。
专利号为ZL200680007522.8的专利文献公开了感应式角位传感器的发明专利，属于单初级线圈、多次级线圈的技术方案，该方案解决了传统磁性传感器容易被永磁体干扰的问题。但是该发明由于采用单一初级线圈激励，4个次级线圈感应，根据能量守恒定律，每个次级 线圈得到的能量实际上只有不到1/4，且该技术方案直接采用比较器对比，在距离稍微远的情况下，比较器的输入压差特别少，比较器具有滞回电压(十几个mV)，出于这个电压范围容易引起比较器输出不稳定，影响计量。
因而现有的流体计量技术存在不足，还有待改进和提高。
发明内容
鉴于上述现有技术的不足之处，本发明的目的在于提供一种无磁计量装置、计量方法和流体计量设备，使用多个初级线圈激励，多个次级线圈感应，其中初级线圈分别相切，同心环形布置，每个初级线圈里面包含一个同心的次级线圈，这样既可以克服直接激励方式的不足，又可以避免单一激励能量不足的影响。
为了达到上述目的，本发明采取了以下技术方案：
一种无磁计量装置，包括计量部和检测部；
所述计量部包括三个或以上的初级线圈、与所述初级线圈数量相同的次级线圈、部分金属化圆盘以及装设在所述部分金属化圆盘中心处的轴；单个所述次级线圈内置在单个所述初级线圈中，并同心、同平面装设，形成电感耦合的单一线圈组件；形成的三个或以上所述线圈组件绕所述轴同平面装设；
所述检测部具有激励模块、检测模块和计量处理器；所述激励模块与所有的所述初级线圈分别连接，同时与所述计量处理器连接；所述检测模块与所有的所述刺激线圈分别连接，同时与所述计量处理器连接。
优选的所述的无磁计量装置，所有的所述次级线圈相互之间并联，后分别与所述检测模块连接。
优选的所述的无磁计量装置，所述检测模块包括放大电路和采样电路，所述放电电路包括多个放大器，所述采样电路包括多个采样器；所述放大器的一端与所述次级线圈连接，另一端通过一个所述采样器与所述计量处理器连接。
优选的所述的无磁计量装置，所述计量处理器具有多个ADC检测通道；每个所述采样器与一个所述ADC检测通道连接。
优选的所述的无磁计量装置，所述检测部还包括放电控制模块，所述放电控制模块与所述计量处理器连接；多个所述放大器还分别与所述放电控制模块连接。
优选的所述的无磁计量装置，所有的所述初级线圈大小相同；所有的所述次级线圈的大小相同。
优选的所述的无磁计量装置，所述部分金属化圆盘的金属化部分占全部的1/n或(n-1)/n；n为所述初级线圈的数量。
优选的所述的无磁计量装置，所述初级线圈和所述次级线圈的数量为3个。
一种用于所述的无磁计量装置的无磁计量方法，包括步骤：
S1、所述计量处理器驱动所述激励模块按照预定顺序依次对所有初级线圈进行激励，同时驱动所述检测模块按照预定顺序依次对所有的次级线圈进行检测，并将检测电压值输送到所述计量处理器中；
S2、所述计量处理器依次识别每个所述次级线圈的检测电压值，若是大于或等于第一预定压值，则记为压值状态1；若是小于或等于第二预定压值，则记为压值状态0；按照所述预定顺序将每个所述次级线圈的压值状态进行排列得到压值状态数列；
S3、所述计量处理器判定所述压值状态数列是否为预定数列，若是，则圈数值累加1；否则，执行步骤S1。
一种流体计量设备，包括所述的无磁计量装置。
相较于现有技术，本发明提供的一种无磁计量装置、计量方法和流体计量设备，具有以下有益效果：
1)本发明中，每一个初级线圈里面含有一个次级线圈，除去金属涡电流损耗剩余的能量基本被同心布置的次级线圈接收，提高了能量的利用率，使计量误差小；
2)无磁计量器具由于限于结构原因，线圈到金属圆盘有一定的距离，本发明可以通过增大激励源的能量，增大次级线圈的接收面积实现增大感应距离；
3)本发明次级线圈在初级线圈中是完整的圆圈，与所述部分金属化圆盘配合使用时，能 够感应的精度较高，接收面积在相等利用空间里面更大，同时能增大感应距离；
4)本发明采用ADC检测通道检测次级线圈的感应电压，直接采样调理后的电压值，所述计量处理器中的ADC检测通道一般的转换精度可以达到12位，若是采用过采样技术则转换精度可以达到16位，这样在远距离情况下，虽然感应的电流较弱，放大后信号不大，但是仍能通过ADC转换后区分出来。
附图说明
图1是本发明提供的无磁计量装置结构示意图；
图2是本发明提供的无磁计量装置中部分金属化圆盘与PCB之间的相对位置示意图；
图3是本发明提供的无磁计量装置中线圈组件的装设结构示意图；
图4是本发明提供的无磁计量原理电路图；
图5是本发明提供的部分金属化圆盘顺时针旋转下压值状态数列的变化图；
图6是本发明提供的部分金属化圆盘逆时针旋转下压值状态数列的变化图。
具体实施方式
为使本发明的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
请一并参阅图1-图6，本发明提供一种无磁计量装置，包括计量部和检测部；
请着重参阅图1，所述计量部包括三个或以上的初级线圈1/2/3、与所述初级线圈1/2/3数量相同的次级线圈4/5/6、部分金属化圆盘9以及装设在所述部分金属化圆盘9中心处的轴A；单个所述次级线圈4/5/6内置在单个所述初级线圈1/2/3中，并同心、同平面装设，形成电感耦合的单一线圈组件；形成的三个或以上所述线圈组件绕所述轴A同平面装设；
请着重参阅图4，所述检测部具有激励模块11、检测模块(未标示)和计量处理器14；所述激励模块11与所有的所述初级线圈1/2/3分别连接，同时与所述计量处理器14连接；所述检测模块与所有的所述刺激线圈分别连接，同时与所述计量处理器14连接。
具体的，请一并参阅图1-图3，所述部分金属化圆盘9绕着轴A旋转，当然，也可以认为是所述轴A转动进而带动所述部分金属化圆盘9转动，使所述部分金属化圆盘9的转动是以，此处转动，可以是沿方向7(顺时针)转动，也可以沿方向8(逆时针)转动。多个所述初级线圈1/2/3相邻的两个之间相切装设，同时所有相切点的切线较差在轴A的中心处，这里需要保证所述初级线圈1/2/3装设的形态是均衡形态，即多个所述初级线圈1/2/3的中心点连线得到的图形是正多边形，例如正三角形或正方形；每个初级线圈1/2/3匹配一个次级线圈 4/5/6，在本实施例中，初级线圈1匹配的是次级线圈4，初级线圈2匹配次级线圈5，初级线圈3匹配次级线圈6，所有的所述初级线圈1/2/3大小相同，次级线圈4/5/6大小相同，初级线圈1/2/3相互之间非成对布置，初级线圈1/2/3与匹配的次级线圈4/5/6共圆心，初级线圈1/2/3与次级线圈4/5/6电感耦合。此处应当说明的是，所述部分金属化圆盘9中金属化部分是连续的，同时金属化部分的金属材质是相同的，例如铜、铁等；请一并参阅图2和图3，所述检测部具有PCB板10，所述线圈组件依照其形态装设在所述PCB板10上；所述激励模块11、所述检测模块和所述计量处理器14均装设在所述PCB板10上。此时，所述PCB板10上布置初级线圈1/2/3与次级线圈4/5/6，PCB板10固定在基表或结构件上，相当于定子，此时所述初级线圈1/2/3相当于也位置固定，所述部分金属化圆盘9根据本领域的通用使用方式，装设的位置是与所述线圈组件相应的位置，相当于转子。
具体的，所述无磁计量装置的工作原理为：初级线圈1/2/3会在激励电路作用下产生激励磁场，激励磁场穿过与之对应的次级线圈4/5/6，激励磁场也会到达金属化圆盘，在金属化圆盘上产生涡电流效应，涡电流会产生与激励磁场相反的磁场，次级线圈4/5/6会得到激励磁场与涡电流产生磁场的总和，也就是复合磁场，根据磁场的变化会导致感应电流的变化，引起放电电流的不一样，导致采样的电压的变化，根据电压的变化，每个次级线圈对应的采样都有一个电压的最大值和一个电压的最小值，所述部分金属化圆盘9由于具有一部分金属，所以在转动过程中，就可以实现在不同的位置，每个次级线圈被检测到的电压不同，从而实现确定所述部分金属化圆盘9的位置，进而进行计量。当然，在实际实施中，检测到的电压值只要大于一定的阈值即可认为是最大电压值，只要小于一定的阈值即可认为是最小电压值。所述阈值的选取使用本领域常用的方法即可，不做限定。无磁计量装置由于限于结构原因，线圈到金属圆盘有一定的距离，本发明可以通过增大激励源的能量，增大次级线圈的接收面积实现增大感应距离；同时，本发明次级线圈在初级线圈中是完整的圆圈，与所述部分金属化圆盘配合使用时，能够感应的精度较高，接收面积在相等利用空间里面更大，同时能增大感应距离。例如，一般情况下，现有技术中无磁计量装置一般的感应距离为7-9mm，远了就没法检测，或检测精度极低，而使用本发明提供的无磁计量检测装置的感应距离，可以达到10-12mm，甚至更高，在现实使用中，可以更加灵活。
请着重参阅图4，其中，L1、L2、L3分别代表初级线圈1/2/3，L4、L5、L6分别代表次级线圈4/5/6。作为优选方案，考虑到在检测过程中，能够实现每个所述次级线圈的电位相同，在本实施例中，所有的所述次级线圈4/5/6相互之间并联，后分别与所述检测模块连接。这样，检测的时候，可以极大的降低误差。此处所述并联状态为，每个所述次级线圈两个输出端(具 体可以参阅图4中的L4/L5/L6的上下两个输出端)中的一个输出端连在一起，另一个输出端与所述检测模块连接，在所述初级线圈被激励时，实现多个所述次级线圈的电位相同。
作为优选方案，本实施例中，所述检测模块包括放大电路12和采样电路13，所述放电电路包括多个放大器V25/V26/V27，所述采样电路13包括多个采样器；所述放大器的一端与所述次级线圈连接，另一端通过一个所述采样器与所述计量处理器14连接。优选的，所述放大器为三极管；所述采样器为电容C1/C2/C3。
作为优选方案，本实施例中，所述计量处理器14具有多个ADC(analog to digital converter，模数转换器)检测通道15；每个所述采样器与一个所述ADC检测通道15连接。当然，这里应当说明的是，所述计量处理器14为本领域常用的MCU(Microcontroller Unit，微控制单元)，其中的所述ADC检测通道转换精度一般为12位，若是采用过采样技术则可以达到转换精度16位，检测精度极高，可以有效保证计量的精度，这样即使在远距离(所述部分金属化圆盘与次级线圈之间的距离)情况下，虽然感应的电流较弱，放大后信号不大，但是仍能通过ADC转换后区分出来。
作为优选方案，本实施例中，所述检测部还包括放电控制模块16，所述放电控制模块16与所述计量处理器14连接；多个所述放大器还分别与所述放电控制模块16连接。
作为优选方案，本实施例中，所有的所述初级线圈1/2/3大小相同；所有的所述次级线圈4/5/6的大小相同。
作为优选方案，本实施例中，所述部分金属化圆盘9的金属化部分占全部的1/n或(n-1)/n；n为所述初级线圈的数量。当然，部分金属化圆盘9的金属化部分还可以为1/n、2/n、……(n-2)/n、(n-1)/n；其中的判定原理一致，不做赘述。
作为优选方案，本实施例中，所述初级线圈和所述次级线圈的数量为3个。
具体的，所述激励电模块11是初级线圈的驱动电路，负责初级线圈产生激励磁场，激励电路可以切换，分别对多个初级线圈进行作用，也可以同时激励，具体取决于实现方式的不一样，此处，所述激励模块11为本领域的常用激励模块11，不做限定；其中，L1、L2、L3分别代表初级线圈1/2/3，L4、L5、L6分别代表次级线圈4/5/6，电阻R1/R2/R3接地，提供一个放大电路12的基准电压(b基级)，便于放大管的导通，其中要求电阻R1/R2/R3阻值相等，即R1＝R2＝R3；所述放大电路12对次级线圈4/5/6微弱的感应电流进行放大，放大后经过采样电路13进行电压采样，采样电路13为每个放大器配置了一个电容C1/C2/C3，因为电容C1/C2/C3有电压保持作用，对于突变信号不会引起变化，不易受瞬时干扰的影响，因此选 用了电容C1/C2/C3作为了采样的器件，电容C1/C2/C3的容值相等，且温度系数要好(具体以现场实施为准，不做限定)，电阻R4/R5/R6分别是电容C1/C2/C3的充电限流电阻，此处电阻R4/R5/R6的阻值相等，温度系数较好(具体以现场实施为准，不做限定)；采样电路13处理后，由所述计量处理器14内部的ADC检测通道15转化，所述计量处理器14同时控制着所述放电控制模块16，可以选着哪一路进行放电，此时，所述激励模块11可以同时对三个所述初级线圈进行激励，只要控制所述发送控制模块就可以实现分别检测，放电时间均可以控制，同时所述计量处理器14也控制着激励模块11，可以单独选择某一路初级线圈进行激励。由于激励周期在ms级别，作用时间在ns级别，远远大于计量器具机械部分转速，因此作用可以分时或同时进行，结果不会有很大的变化。
所述激励模块11驱动初级线圈1/2/3，初级线圈1/2/3会产生激励磁场，激励磁场穿过与之对应的次级线圈4/5/6(4，5，6)，其中初级线圈1与次级线圈4、初级线圈2与次级线圈5、初级线圈3与次级线圈6一一对应，激励磁场也会到达所述部分金属化圆盘9，在部分金属化圆盘上的金属部分产生涡电流效应，涡电流会产生与激励磁场相反的磁场，次级线圈4/5/6会得到激励磁场与涡电流产生磁场的总和，也就是复合磁场，根据磁场的变化会导致感应电流的变化，经过放大电路12对次级线圈4/5/6的感应电流进行放大，放大后的感应电流成了采样电路13中电容C1、C2、C3的放电电流，由于金属化圆盘经过不同的位置，会引起感应电流的变化，也就引起C1、C2、C3放电电流的不一样，要求放电控制电路放电时间控制一致，因此相同放电时间下，C1、C2、C3的电压不一样，通过计量处理器14内部的ADC检测通道15进行转化，得到不同的电压值，根据电压值的不同实现计量(所述部分金属化圆盘9旋转一周，次级线圈4/5/6被检测的电压值会呈现周期性变化)。
相应的，本发明还提供一种无磁计量方法，包括步骤：
S1、所述计量处理器14驱动所述激励模块11按照预定顺序依次对所有初级线圈1/2/3进行激励，同时驱动所述检测模块按照预定顺序依次对所有的次级线圈4/5/6进行检测，并将检测电压值输送到所述计量处理器14中；此处，应当说明的是，每次对所述初级线圈的激励的时间为本领域的常用时长即可，不做局限限定；每次激励的时间的为ns级别，两次激励的时间间隔为10-30ms；
S2、所述计量处理器14依次识别每个所述次级线圈4/5/6的检测电压值，若是大于或等于第一预定压值，则记为压值状态1；若是小于或等于第二预定压值，则记为压值状态0；按照所述预定顺序将每个所述次级线圈4/5/6的压值状态进行排列得到压值状态数列；
S3、所述计量处理器14判定所述压值状态数列是否为预定数列，若是，则圈数值累加1；否则，执行步骤S1。
具体的，以所述初级线圈的数量为3个，所述部分金属化圆盘9的金属化部分为2/3为例，做详细说明：当所述部分金属化圆盘9，经过次级线圈4和6的位置时，所述计量处理器14驱动所述激励模块11对初级线圈1、初级线圈2、初级线圈3分时激励，即按照初级线圈1-3的顺序进行激励，首先激励初级线圈1，产生穿过次级线圈4的激励磁场，同时打开放电控制模块16，放电计时，要求每一个线圈放电时间一致，激励磁场经过金属化圆盘，由于涡电流效应产生反向的磁场穿过次级线圈4，使得次级线圈4的复合磁场降低，感应电流减少，对应经过放大器V25/V26/V27处理后，对应的放大后的电流也相对应减少，使得电容C1在相等的放电时间里电压达到最大，经过ADC处理后得到二进制，转化为浮点数，这里记录为V4max(检测到的电压值大于所述第一预定压值),同时主控记录状态为1；然后激励初级线圈2，产生穿过次级线圈5的激励磁场，同时激励磁场经过金属化圆盘产生反向的很弱磁场经过次级线圈5，由于部分金属化圆盘9的金属部分完全不在次级线圈5的对应位置，复合磁场基本等于激励磁场，这时候感应电流达到最大值，对应放大后的放电电流最大，对应电容C2的电压达到最小值，经过ADC转化后，二进制转化为浮点数记录为V5min(检测到的电压值小于所述第二预定压值)，记录状态为0；再次激励初级线圈3，产生穿过次级线圈6的激励磁场，由于金属化圆盘的金属完全覆盖次级线圈6，激励磁场到达金属后产生反向穿过次级线圈6的磁场，导致次级线圈6的复合磁场减少，导致感应电流减少，对应经过放大电路12处理后，对应的放大后的电流相对减少，使得电容C3达到最大值，经过ADC后得到的二进制经过浮点运算输出，这里记录为V6max，主控记录状态为1；此时，得到的所述压值状态数列为按照次级线圈4/5/6顺序排列为101；
所述部分金属化圆盘9，绕着轴A顺时针方向转动120度，所述部分金属化圆盘9的金属部分经过次级线圈5和6的正下方，首先激励初级线圈1，产生穿过次级线圈4的激励磁场，由于部分金属化圆盘9的金属化部分完全避开了次级线圈4，这样基本可以忽略涡电流的影响，次级线圈4的复合磁场基本等于激励磁场，这时候次级线圈4得到的感应电流最大，对应放大后的放电电流最大，电容C1上的电压达到最小值，经过ADC转换后，转化浮点数记录为V4min，主控记录的状态为0；然后激励初级线圈2,由于金属化圆盘完全经过次级线圈5的正下方，复合磁场降低，感应电流减少，对应的放大后的放电电流变小，电容C2上的电压经过放电后达到最大值，ADC处理后，二进制转化为浮点数这里记录为V5max，主控记录状态为1；再次激励初级线圈3，产生经过次级线圈6的激励磁场，金属化圆盘经过次级线圈6，导致复合磁场降低，对应次级线圈的感应电流减少，导致经过放大后的放电电流减 少，C3经过放电后达到最大值，ADC处理后，二进制转化为浮点数这里记录为V6max，主控记录状态为1；此时，得到的所述压值状态数列为按照次级线圈4/5/6顺序排列为011；
所述部分金属化圆盘9，绕着轴A，再次顺时针旋转120度，此时，所述部分金属化圆盘9的金属部分刚好经过次级线圈4和5，首先激励初级线圈1，产生穿过次级线圈4的激励磁场，同时激励磁场也会到达所述部分金属化圆盘9的金属部分，因涡电流产生反向的磁场，使得次级线圈4的复合磁场降低，导致次级线圈4的感应电流减少，对应的放电电流减少，电容上的C1的值达到经过放电后的最大值，经过ADC处理，二进制再转浮点数记录为V4max,主控记录状态为1；然后激励初级线圈2，产生穿过次级线圈5的激励磁场，同时激励磁场也会到达圆盘的金属部分，因涡电流产生反向的磁场，使得次级线圈4的复合磁场降低，导致次级线圈4的感应电流减少，对应的放电电流减少，电容上的C2的值达到经过放电后的最大值，经过ADC处理，二进制再转浮点数记录为V5max，主控记录状态为1；再次激励初级线圈3,产生穿过次级线圈6的激励磁场，由于金属化圆盘的金属部分并没经过次级线圈6，复合磁场基本等于激励磁场，导致次级线圈6的感应电流增加，对应的放大后的放电电流增加，电容C3的电压经过放电后达到最小值，经过ADC转换成二进制，二进制进一步转为浮点数记录为V6min，主控记录状态为0；此时，得到的所述压值状态数列为按照次级线圈4/5/6顺序排列为110；
所述部分金属化圆盘9，绕着轴A，再次顺时针旋转120度，所述部分金属化圆盘9的金属化部分经过次级线圈4和6，回到步骤一，此时，再次得到所述压值状态数列为按照次级线圈4/5/6顺序排列为101，所述无磁计量装置选抓一圈完成。统计出所述部分金属化圆盘9在顺时针旋转状态下，压值状态数列为101、011、110状态变化，见图5。若是，所述部分金属化圆盘9为逆时针旋转，操作基本一致，只是旋转方向不一样，因此这里不再描述其过程，统计出所述部分金属化圆盘9在逆时针旋转状态下，压值状态数列为101、110、011状态变化，具体见图6。另外，当所述部分金属化圆盘9的金属化部分为1/3时，所述压值状态数列为100、010、001形态变化，其原理如上述。
当然，本发明还提供一种流体计量设备，包括所述的无磁计量装置。所述流体计量设备包括水表、燃气表等，其中计量的过程如上述，同时，水量或燃气量的体积计算也是使用的本领域的常用技术手段，此处不做赘述。
可以理解的是，对本领域普通技术人员来说，可以根据本发明的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本发明所附的权利要求的保护范围。

Claims (10)

  1. 一种无磁计量装置，其特征在于，包括计量部和检测部；
    所述计量部包括三个或以上的初级线圈、与所述初级线圈数量相同的次级线圈、部分金属化圆盘以及装设在所述部分金属化圆盘中心处的轴；单个所述次级线圈内置在单个所述初级线圈中，并同心、同平面装设，形成电感耦合的单一线圈组件；形成的三个或以上所述线圈组件绕所述轴同平面装设；
    所述检测部具有激励模块、检测模块和计量处理器；所述激励模块与所有的所述初级线圈分别连接，同时与所述计量处理器连接；所述检测模块与所有的所述刺激线圈分别连接，同时与所述计量处理器连接。
  2. 根据权利要求1所述的无磁计量装置，其特征在于，所有的所述次级线圈相互之间并联，后分别与所述检测模块连接。
  3. 根据权利要求2所述的无磁计量装置，其特征在于，所述检测模块包括放大电路和采样电路，所述放电电路包括多个放大器，所述采样电路包括多个采样器；所述放大器的一端与所述次级线圈连接，另一端通过一个所述采样器与所述计量处理器连接。
  4. 根据权利要求3所述的无磁计量装置，其特征在于，所述计量处理器具有多个ADC检测通道；每个所述采样器与一个所述ADC检测通道连接。
  5. 根据权利要求3所述的无磁计量装置，其特征在于，所述检测部还包括放电控制模块，所述放电控制模块与所述计量处理器连接；多个所述放大器还分别与所述放电控制模块连接。
  6. 根据权利要求1所述的无磁计量装置，其特征在于，所有的所述初级线圈大小相同；所有的所述次级线圈的大小相同。
  7. 根据权利要求1所述的无磁计量装置，其特征在于，所述部分金属化圆盘的金属化部分占全部的1/n或(n-1)/n；n为所述初级线圈的数量。
  8. 根据权利要求1所述的无磁计量装置，其特征在于，所述初级线圈和所述次级线圈的数量为3个。
  9. 一种用于权利要求1-8任一所述的无磁计量装置的无磁计量方法，其特征在于，包括步骤：
    S1、所述计量处理器驱动所述激励模块按照预定顺序依次对所有初级线圈进行激励，同时驱动所述检测模块按照预定顺序依次对所有的次级线圈进行检测，并将检测电压值输送到所述计量处理器中；
    S2、所述计量处理器依次识别每个所述次级线圈的检测电压值，若是大于或等于第一预定压值，则记为压值状态1；若是小于或等于第二预定压值，则记为压值状态0；按照所述预定顺序将每个所述次级线圈的压值状态进行排列得到压值状态数列；
    S3、所述计量处理器判定所述压值状态数列是否为预定数列，若是，则圈数值累加1；否则，执行步骤S1。
  10. 一种流体计量设备，其特征在于，包括权利要求1-8任一所述的无磁计量装置。
PCT/CN2020/133765 2020-05-29 2020-12-04 一种无磁计量装置、计量方法和流体计量设备 WO2021238137A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010476377.X 2020-05-29
CN202010476377.XA CN111521228A (zh) 2020-05-29 2020-05-29 一种无磁计量装置、计量方法和流体计量设备

Publications (1)

Publication Number Publication Date
WO2021238137A1 true WO2021238137A1 (zh) 2021-12-02

Family

ID=71911332

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/133765 WO2021238137A1 (zh) 2020-05-29 2020-12-04 一种无磁计量装置、计量方法和流体计量设备

Country Status (2)

Country Link
CN (1) CN111521228A (zh)
WO (1) WO2021238137A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111521228A (zh) * 2020-05-29 2020-08-11 湖南威铭能源科技有限公司 一种无磁计量装置、计量方法和流体计量设备
CN112066869B (zh) * 2020-09-16 2022-06-21 上海信朴臻微电子有限公司 角位移传感系统及角位移分析方法
CN112325995A (zh) * 2020-11-10 2021-02-05 湖南威铭能源科技有限公司 一种无磁水表校验装置
CN113884165B (zh) * 2021-06-07 2024-04-19 利尔达科技集团股份有限公司 一种无磁计量模块性能检测装置及实现方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1122520A1 (en) * 2000-02-01 2001-08-08 Cherry GmbH Position sensor
CN109443462A (zh) * 2018-12-07 2019-03-08 杭州为峰智能科技有限公司 一种防磁计量检测装置
CN209820546U (zh) * 2019-05-13 2019-12-20 杭州广仪科技有限公司 一种防磁计量装置
CN209820564U (zh) * 2019-05-13 2019-12-20 杭州广仪科技有限公司 一种线圈感应式计量装置
CN209947622U (zh) * 2019-07-29 2020-01-14 成都千嘉科技有限公司 一种脉冲式表具传感器及脉冲式表具
CN111521228A (zh) * 2020-05-29 2020-08-11 湖南威铭能源科技有限公司 一种无磁计量装置、计量方法和流体计量设备

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156363A (en) * 1978-05-03 1979-05-29 Hokushin Electric Works, Ltd. Magnetic flowmeter
FR2882818B1 (fr) * 2005-03-07 2007-10-19 Sappel Soc Par Actions Simplif Capteur inductif de position angulaire
US9121550B2 (en) * 2011-07-12 2015-09-01 Baker Hughes Incorporated Apparatus of a magnetic resonance multiphase flow meter
CN110319898B (zh) * 2019-06-12 2024-09-10 宁波水表(集团)股份有限公司 一种电涡流机电转换装置及方法
CN110823300A (zh) * 2019-11-28 2020-02-21 王元西 一种平面绕线线圈角位传感器
CN111060164A (zh) * 2019-12-26 2020-04-24 江苏远传智能科技有限公司 感应式旋转计量装置
CN111089631A (zh) * 2020-02-12 2020-05-01 成都千嘉科技有限公司 一种无磁传感采集燃气表读数的装置
CN212721576U (zh) * 2020-05-29 2021-03-16 湖南威铭能源科技有限公司 一种无磁计量装置和流体计量设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1122520A1 (en) * 2000-02-01 2001-08-08 Cherry GmbH Position sensor
CN109443462A (zh) * 2018-12-07 2019-03-08 杭州为峰智能科技有限公司 一种防磁计量检测装置
CN209820546U (zh) * 2019-05-13 2019-12-20 杭州广仪科技有限公司 一种防磁计量装置
CN209820564U (zh) * 2019-05-13 2019-12-20 杭州广仪科技有限公司 一种线圈感应式计量装置
CN209947622U (zh) * 2019-07-29 2020-01-14 成都千嘉科技有限公司 一种脉冲式表具传感器及脉冲式表具
CN111521228A (zh) * 2020-05-29 2020-08-11 湖南威铭能源科技有限公司 一种无磁计量装置、计量方法和流体计量设备

Also Published As

Publication number Publication date
CN111521228A (zh) 2020-08-11

Similar Documents

Publication Publication Date Title
WO2021238137A1 (zh) 一种无磁计量装置、计量方法和流体计量设备
CN109443462B (zh) 一种防磁计量检测装置
JP2568620B2 (ja) 電磁流量計
US5159335A (en) Switched capacitance automatic meter reading device
CN110412310B (zh) 角位感应式传感器及感应方法
CN111174856B (zh) 一种旋转检测装置
CN104237623A (zh) 一种高精度电流传感器检测电路及其检测方法
CN105572456A (zh) 交直流磁通门电流传感器
CN111595233A (zh) 一种无磁传感器
CN112050865B (zh) 无磁感应测量装置及转动板组件转动信息的计算方法
CN110286246A (zh) 涡轮转速检测方法及装置
CN107907587A (zh) 一种欠阻尼状态脉冲涡流检测系统
CN212721576U (zh) 一种无磁计量装置和流体计量设备
CN106645881A (zh) 一种可跟踪峰值的检测电路
WO2022007322A1 (zh) 一种无磁计量装置、无磁计量方法和流量表
CN209945434U (zh) 一种感应式无磁远传水表
CN106054088B (zh) 一种提高磁通量传感器动态输出范围的自零放大电路
JPH1069741A (ja) サーボ復調装置
CN110345973A (zh) 电涡流传感器及检测方法
CN113702488B (zh) 一种同轴心圆形矩形双线圈涡流探头
CN206193088U (zh) 一种可跟踪峰值的检测电路
CN210741517U (zh) 基于数字锁存霍尔传感器的定位检测系统
CN212482605U (zh) 一种自感应式计量检测装置
CN209878040U (zh) 流体计量电路、流量计和计量仪
CN112798061A (zh) 一种用于水表和燃气表的无磁感应式旋转传感器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20937908

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20937908

Country of ref document: EP

Kind code of ref document: A1