WO2017016000A1 - Metal sensor - Google Patents
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- WO2017016000A1 WO2017016000A1 PCT/CN2015/087330 CN2015087330W WO2017016000A1 WO 2017016000 A1 WO2017016000 A1 WO 2017016000A1 CN 2015087330 W CN2015087330 W CN 2015087330W WO 2017016000 A1 WO2017016000 A1 WO 2017016000A1
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- the invention relates to the field of detection and positioning, and in particular to a metal sensor.
- Metal detectors are mainly used to locate metal objects. Existing detectors are divided into many categories and operate through a variety of principles.
- the main component is a sensor
- the sensor is formed by a coil
- the transmitting coil is used to emit a continuous alternating field.
- the alternating field is received by the receiving coil.
- the receiving coil is arranged such that it is not When the object to be tested has an influence, the induced voltages on the receiving coil cancel each other out, so that the induced voltage output is close to zero. If the object to be measured has an influence, the object to be measured changes the original alternating field, and To be precise, the object to be measured produces another alternating field, which is transmitted to the receiving coil and generates an induced voltage on the receiving coil, which is amplified and analyzed accordingly.
- FIG. 1 is a schematic structural view of a sensor in the prior art, the geometry of which is: a receiving coil system consisting of two sets of inverted first receiving wire loop 1 and second receiving wire loop 2, first receiving wire loop 1 and The two receiving wire loops 2 are arranged coaxially to one another in a common plane 3, the transmitter coil 4 being situated at a distance z above the common receiver plane 3, the transmitter coil also being identical to the first receiving wire loop 1 and The two receiving wire loops 2 are arranged coaxially.
- the windings of the first receiving wire loop 1 are here, for example, arranged to be wound clockwise, and the windings of the second receiving wire loop 2 are wound in a counterclockwise direction, so that the voltages induced in these windings have opposite signs and After appropriately sizing, it is possible to compensate each other without outputting an induced voltage in the absence of an external target.
- the object positioned by the sensor has the following defects: (1) because the transmitting coil generates a large alternating field, and the measured object passes the sense The reverse field that should be generated is extremely small, so when detecting the alternating field generated by the extremely weak object, the receiving coil must ignore the alternating field generated by the huge transmitting coil, so that the receiving coil and the transmitting coil do not exist.
- the first receiving wire loop 1 and the second receiving wire loop 2 must be reversed, so that the alternating field generated by the target must be cancelled, and the sensitivity of the detecting is reduced.
- the target is at a specific position, the induced voltage of the second magnetic field in the receiving coil is completely canceled, so that a dead zone of measurement is formed, and the target is not detected, but the target actually exists, that is, There is a blind spot or the most extremely low sensitivity area;
- the second coil of the first coil is coaxial with different radii, changing the magnetic flux is mainly achieved by changing the area. In order to reach a larger range of compensation, the radius of the two coils The difference can not be too small, can only be achieved by increasing the size of the board, which inevitably occupies board space.
- the present invention is directed to the deficiencies in the prior art, and provides a metal sensor in which the receiving coils are arranged with the same winding direction, and the second magnetic field generated for the target metal object is superimposed on the receiving coil to generate an induced voltage. Sensitivity to the target, and does not form a blind spot of measurement, greatly improving the accuracy of the measurement.
- a metal sensor having at least one transmitting coil and at least one receiving coil system inductively coupled to each other, the receiving coil system including at least one first receiving coil and at least one second receiving coil in a same plane, the transmitting coil being a projection is formed on the plane, an area formed by the first receiving coil on the plane includes the projection, and an area formed by the second receiving coil on the plane is disposed around the projection, The first receiving coil and the second receiving coil are electrically connected.
- the area formed by the first receiving coil on the plane all includes the cast Shadow.
- the portion of the region formed by the first receiving coil on the plane contains the projection.
- the second receiving coil has a region formed on the plane, and the region is surrounded by an opening around the projection.
- the second receiving coil has at least two regions formed on the plane, and the regions are sequentially distributed around the projection.
- one output stage is respectively disposed on the connection line of the first receiving coil and/or the second receiving coil and/or the first and second receiving coils.
- first receiving coil is provided with at least two output stages
- second receiving coil is provided with at least two output stages
- the switching device is included, and the output stages on the first receiving coil and the second receiving coil are respectively connected to the switching device.
- the switching device is a Mos tube or a tertiary tube.
- an analysis circuit is included, and an output stage of the receiving coil system is connected to the analysis circuit through a switching device.
- an analysis circuit is included, and an output stage of the receiving coil system is connected to the analysis circuit.
- the analysis circuit includes an operational amplifier and a processor.
- the transmitting coil is embedded in a printed circuit board.
- a measuring device comprising the sensor described above.
- the measuring device is a handheld positioning device.
- the second magnetic field generated by the target is superimposed by the coils in the same direction, so that the induced electromotive force generated by the coils is superimposed on each other, thereby enhancing the sensitivity of the receiving coil to the magnetic field induction of the target, and Forming the blind zone of the measurement greatly improves the accuracy of the measurement; at the same time, the first receiving coil and the second receiving coil are arranged on the circuit board, and the precision of the position is very high for the external winding receiving coil, which can be 0.1 mm at present
- the above greatly improves the consistency of the product, and can better offset the induced voltage generated by the first magnetic field, and the cost can be reduced by being arranged on the circuit board.
- FIG. 1 is a schematic structural view of a prior art metal sensor
- FIG. 2 is a schematic structural view of a first embodiment of a metal sensor according to the present invention.
- FIG. 3 is a schematic structural view of a second embodiment of a metal sensor according to the present invention.
- FIG. 4 is a schematic diagram showing the connection of a receiving coil system corresponding to a metal sensor according to an embodiment of the present invention
- FIG. 5 is a schematic diagram showing the connection of a receiving coil system corresponding to the second embodiment of the metal sensor of the present invention.
- FIG. 6 is a schematic structural diagram of a geometrical structure corresponding to a metal sensor according to the present invention.
- FIG. 7 is a schematic structural diagram of a geometrical structure corresponding to a metal sensor according to a second embodiment of the present invention.
- FIG. 8 is a schematic diagram of detection of a metal sensor according to a first embodiment of the present invention.
- FIG. 9 is a schematic diagram of detection of a second embodiment of a metal sensor according to the present invention.
- Figure 10 is a vector diagram of the analysis method of the present invention.
- Figure 11 is a measurement curve of a detection signal of the detection method of the present invention.
- the terms “installation”, “connected”, “connected”, “fixed” and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or connected integrally; may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
- installation shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise.
- , or connected integrally may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
- the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
- the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them.
- the first feature "above”, “above” and “above” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature.
- the first feature “below”, “below” and “below” the second feature includes the first feature directly below and below the second feature, or simply The first feature level is less than the second feature.
- field line should not be understood literally, since to some extent the "field line” only more simply represents the same magnetic strength and pole. Sexual area. For this reason, in the following description of the invention, this term will be used to denote the magnetic density. For better description, only one winding is used to represent the coil. It will be readily understood that the present invention is considered to have its starting coil having a plurality of windings, or the coils being "printed" on the board. The alternating signal can operate in the coil; the field lines are represented during the course of a single clock phase.
- a greatly simplified schematic diagram shows a first embodiment of the sensor geometry of the sensor of the invention for positioning a metal object.
- a metal sensor having a transmitting coil 100 and a receiving coil system 200 inductively coupled to each other. This embodiment is described by taking one transmitting coil 100 and one receiving coil system 200 as an example, but the sensor of the present invention is not limited to one.
- the receiving coil system 200 of the present invention includes a first receiving coil 201 and a second receiving coil 202 on the same plane, the transmitting coil 100 forming a projection on the plane, the first receiving coil 201 being in the plane
- the above-formed regions all include the projections, and of course may also partially include the projections
- the second receiving coil 202 has one area formed on the plane, and the area is surrounded by an opening.
- the receiving coil system 200 is not limited to include a first receiving coil 201 and a second receiving coil 202 in the same plane, which constitute Can be two or more.
- FIG. 3 a greatly simplified schematic diagram for positioning gold
- a metal sensor having a transmitting coil 100 and a receiving coil system 200 inductively coupled to each other. This embodiment is described by taking one transmitting coil 100 and one receiving coil system 200 as an example, but the sensor of the present invention is not limited to one.
- the receiving coil system 200 of the present invention includes a first receiving coil 201 and a second receiving coil 202 on the same plane, the transmitting coil 100 forming a projection on the plane, the first receiving coil 201 being in the plane
- the above-formed regions all include the projections. Of course, the projections may be partially included.
- the second receiving coil 202 has two regions formed on the plane, respectively being the second receiving coils (202'. , 202"), the regions are sequentially distributed around the projection, and the first receiving coil 201 and the second receiving coil (202', 202") are electrically connected, and the receiving coil system 200 is not limited to include One first receiving coil 201 and two second receiving coils second receiving coils (202', 202") of the same plane may be composed of three or more.
- the optimal mode is that the second receiving coil (202', 202") group is symmetrically distributed with respect to the transmitting coil 100, and the various factors such as humidity and temperature may affect the emission.
- the magnetic field of the coil 100 if it is symmetrical, better offsets this effect, of course, the asymmetry can also be achieved.
- the specific implementation process sometimes to increase the sensitivity, while maintaining the balance of the induced voltage, increase the reception
- the number of wires of the coil system such as the first receiving coil 201 or the second receiving coil (202, 202', 202") and the area enclosed by the coil can improve the sensitivity of the measurement.
- the position setting of the transmitting coil 100 of this embodiment may be located at a certain distance above the common receiving plane and arranged in parallel with the receiving coil system 200. At least two of the printed circuit are provided for fixed mounting of the transmitting coil 100. a positioning hole, a pin of the transmitting coil 100 is inserted into the positioning hole and soldered on the circuit board; the transmitting coil 100 may also be a wire structure directly disposed on the printed circuit board or embedded in the printed circuit board. The way is fine.
- the first receiving coil 201 and the second receiving coil 202 of the present invention have the same winding direction.
- the positive electrode of the induced voltage of the first receiving coil 201 is as shown in FIG.
- the connection manner corresponding to the second embodiment is similar to that shown in FIG. 5.
- the connection mode it can be seen that for the induced voltage of the receiving coil to induce the first magnetic field, the connection mode can cancel the induced voltage, and the induced voltage of the second magnetic field is superimposed, so that the first sensing can be cancelled out.
- the induced voltage of the magnetic field can increase the induced voltage of the second magnetic field, which greatly improves the sensitivity of the detection.
- the receiving coil and the second receiving coil are arranged on the circuit board, and the precision of the position is very high for the external winding receiving coil, and can be more than 0.1 mm at present, which greatly improves the consistency of the product and can better offset
- the induced voltage generated by the first magnetic field can be reduced on the circuit board.
- connection points that is, the output stages
- the first receiving coil 201 is generally disposed at least in the figure.
- a connection point if set as a connection point, is generally set at the beginning of the coil. The more the set point, the larger the range that can be calibrated. Generally, it is preferable to set 3 points, corresponding to the first one of the first embodiment.
- the receiving coil 201 is provided with three output stages (11, 22, 33). The smaller the position interval of the output stage, the higher the accuracy of the calibration, and it is generally about one turn apart, and the interval is consistent.
- connection point is generally disposed on the second receiving coil 202. If it is set as a connection point, it can be disposed at the end position of the coil, generally about 3 to 10, corresponding to the second receiving coil of the first embodiment.
- the 202 has three output stages (44, 55, 66).
- the output stage connection point can be set to a position that satisfies the following conditions: in the absence of metal, the second reception The voltage induced between the output stages furthest apart on the coil is substantially equal to the voltage induced between the two output stages closest to the first receiving coil; or the first connection The voltage induced between the output stages of the farthest interval on the receiving coil is substantially equal to the voltage induced between the two output stages of the second receiving coil, and the smaller the position interval of the connecting points on the second receiving coil, The higher the accuracy of the calibration, the more connection points are required, generally about one turn apart, and the spacing is consistent.
- the three output stages (11, 22, 33) on the first receiving coil 201 are electrically connected to one ends of the switching devices (11 ⁇ , 22 ⁇ , 33 ⁇ ), respectively, and the other ends of the three switching devices are electrically connected to the input terminals of the amplifying circuit 500.
- the output port of the amplifying circuit 500 is connected to the processor 400.
- the switching device of the embodiment is generally a Mos tube or a three-stage tube, and the processor 400 controls the closing and opening of the switching device.
- the amplifier of this embodiment generally selects an operational amplifier with high input impedance, low noise, and low temperature drift.
- the three output stages (44, 55, 66) on the second receiving coil 202 are electrically connected to one end of the switching device (44 ⁇ , 55 ⁇ , 66 ⁇ ), respectively, and the other end of the three switching devices and the input of the amplifying circuit 500.
- the terminal is electrically connected, and the output of the amplifying circuit 500 is connected to the processor 400.
- the operating device runs the device in the absence of the object to be located, and the processor 400 sequentially detects the output signal amplitude of each output stage through the switching device by controlling each output stage, and stores the switching device setting information, the switching device setting information is The output signal amplitude is used to compare and filter the open/close state information of each switch device corresponding to the selected minimum amplitude output signal; the switch device is controlled to open and close according to the switch device setting information, and the running device performs object positioning.
- the transmitting coil 100 is driven to generate an alternating magnetic field in the absence of an object, and the processor 400 detects the amplitude of the output signal of the amplifying circuit 500.
- the processor 400 directly reads the state of the switch from the non-volatile memory in the next operation, The sensitivity to the detection of the target is improved; the state of the switching device of this embodiment has n*m states, where n is the number of connection points on the first receiving coil, and m is the connection on the second receiving coil. The number of points.
- the first receiving coil 201 and the second receiving line of the embodiment of the present invention can arrange a plurality of coil numbers in a small area, and in the first receiving coil 201 and the second receiving coil (202, 202', 202"
- the coils are arranged at different positions, so that the calibration can be performed over a wide range. It saves space, can increase the number of switches set, improve the adjustment precision, and can realize bidirectional calibration of the induced voltage, greatly improving the adjustment accuracy.
- an analysis circuit is further included, the analysis circuit includes an operational amplifier and a processor, and an output stage of the receiving coil system 200 of the embodiment of the present invention may be connected to the analysis circuit through a switching device. It can also be directly connected to the analysis circuit, and the following is described by being connected to the analysis circuit through a switching device.
- the processor can control the opening and closing of the switching device, and the switching device connected to the connection point on the first receiving coil 201 One end is connected to the input end of the amplifying circuit, the other end of the switching device connected to the connection point on the second receiving coil 202 is connected to the other end input end of the amplifying circuit, and a capacitor is connected in series at the input end of the amplifying circuit to reduce the receiving coil DC
- the effect of the signal, the amplifier output is electrically connected to the processor, and the op amp typically selects a high input impedance, low noise, low temperature drift op amp.
- the line segments of the first receiving coil 201 and the second receiving coil 202 of the present embodiment have a planar, single-layer winding geometry. Moreover, it is possible to arrange a plurality of coil numbers in a small area, and the present invention can arrange a plurality of receiving coils in a small area, and connect each coil group in the switching device (1'-6').
- the number of wires in the circuit can be adjusted in a larger range, and the arrangement space of the number of receiving coils can be saved, and the length (number of times) and the number of switching devices of each adjacent switching device can be adjusted in advance.
- the range and accuracy of the control are controlled, that is, the dimensional accuracy of the winding is very high, and it is technically not problematic to accurately manufacture a copper structure of up to 25 ⁇ m on the board.
- the invention analyzes the measurement signal of the sensor by the following method: digitally generating an excitation signal of frequency F1, driving the transmitting coil, generating an alternating magnetic field, and measuring amplifier of the analyzing circuit of the sensor
- Whether or not there is target data is analyzed.
- spectrum analysis is performed on the converted signal to obtain a vector of a signal of frequency F1, which is represented as a vector signal A (Vx1 in the complex plane).
- the amplitude of the vector signal C is greater than a set threshold, theoretically, in the absence of an object, the amplitude of C is zero, and there is no phase, but in practice, due to the noise of the power supply, the receiving coil Distribution, the noise of the op amp circuit, temperature, humidity and other factors, so that the vector signal C is not 0, assuming the threshold is set to W, due to the randomness of the noise, the phase is also uncertain, at this time there is no The object exists.
- the magnitude of the vector is greater than W and the phase also satisfies the condition, then an object is considered to exist.
- phase is also different, so after the circuit is determined, the metal objects with the largest magnetic permeability and the smallest magnetic permeability are respectively measured, and their phase values are recorded.
- the phase range covered by the metal object can be obtained, so when the amplitude of the vector C is greater than W, but the phase is within the range of the first phase interval covered, it can be judged that there is metal, and the first phase interval
- the values of the two ends are the phase values of the vector signal C when the object to be detected is the metal with the largest magnetic permeability and the lowest magnetic permeability.
- the magnetic metals with the largest magnetic permeability and the smallest magnetic permeability are measured, and they are recorded.
- the phase value of the phase can be obtained, so when the amplitude of the vector C is greater than W, but the phase is within the range of the second phase interval covered, it can be judged that the presence of magnetic metal exists.
- the values of the two ends of the second phase interval are the phase values of the vector signal C when the object to be detected is the magnetic material with the largest magnetic permeability and the smallest magnetic permeability, and so on. Measuring the non-magnetic metal with the largest magnetic permeability and the smallest magnetic permeability, and recording their phase values, the phase range covered by the object can be obtained, so when the amplitude of the vector C is greater than W, the phase is at the third coverage.
- phase interval there is a non-magnetic metal, wherein the two ends of the third phase interval are respectively the magnetic permeability of the object to be detected.
- the sensor of the present invention detects an object enclosed in a medium by the following detection method.
- the detection method of the present invention is as follows: the attribute and position information of the enclosed object are obtained by analyzing the measurement signal, the measurement The signal is a vector signal obtained by subtracting a signal generated by the receiving coil end from the preset signal when the sensor detects the state, and the preset signal is a signal generated by the sensor receiving coil end in the absence of the object.
- the output determination signal When the amplitude of the measurement signal is greater than a set threshold, the output determination signal displays an object in the medium, analyzes the phase of the measurement signal, and outputs a determination signal when the phase of the measurement signal is within the first phase interval.
- the object in the display medium is metal, otherwise the output judgment signal indicates that the object in the medium is no metal object; the two ends of the first phase interval are respectively measured when the object to be detected is the metal with the largest magnetic permeability and the smallest magnetic permeability.
- the phase value of the signal is the amplitude of the measurement signal.
- the output determination signal displays an object in the medium, analyzes the phase of the measurement signal, and outputs a determination signal when the phase of the measurement signal is within the second phase interval.
- the object in the display medium is a magnetic metal
- the two ends of the second phase interval are phase values of the measurement signal when the object to be detected is a magnetic metal having the largest magnetic permeability and the smallest magnetic permeability.
- the output judgment signal indicates that the object in the medium is a non-magnetic metal
- the two ends of the third phase interval are respectively the magnetic permeability and the magnetic permeability of the object to be detected.
- the phase value of the signal is measured with the smallest non-magnetic metal.
- the detection method of the present invention can also distinguish between magnetic metal and non-magnetic metal based on the phase value.
- the amplitude change of the measurement signal is analyzed, and the first wave peak and the second wave peak position in the amplitude change of the measurement signal are recorded, and the midpoint position information of the plane position one and two is used as the medium object in the medium.
- the closest location information output.
- the sensor of the present invention when the target object is not located below the receiving coil, the closer the receiving coil system is to the target, the vector The larger the amplitude of C is, the smaller the amplitude of vector C is when the receiving coil is far away from the target; when the metal moves from the edge of the receiving coil toward the receiving coil, the amplitude of vector C becomes smaller from small to large.
- the amplitude of the vector C suddenly changes from large to small, indicating that the object is close to the center point of the second receiving coil system. At this time, it is marked as the starting point of the midpoint.
- the target is in the second position.
- the center position of the receiving coil when the amplitude of the vector C suddenly changes from large to small, indicating that the target is away from the second receiving coil, and is marked as the end point of the midpoint.
- the sensor of the invention can advantageously be integrated into a measuring device.
- the measuring device can be embodied in particular as a hand-held metal positioning device or as a further function comprising the metal positioning capability of the sensor of the invention.
- the invention makes it possible to realize a low-cost sensor which makes it possible to replace as many costly components and device components as possible, that is to say that the sensor circuit board is used not only as a carrier material for the electronic circuit but also as a functional part.
- a sensor for positioning a metal object according to the present invention requires only a single coil. This is in particular by replacing the typically wound receiving coil as disclosed in the prior art by means of a wire set on the circuit board of the sensor's analysis circuit.
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Abstract
A metal sensor, having at least one transmission coil (100) and at least one receiving coil system (200) inductively coupled to each other, wherein the receiving coil system (200) comprises at least one first receiving coil (201) and at least one second receiving coil (202) which are located in a same plane, the transmission coil (100) forms a projection on the plane, an area formed by the first receiving coil (201) on the plane contains the projection, and an area formed by the second receiving coil (202) on the plane is arranged around the projection. The receiving coils (201, 202) are arranged to have the same winding direction therebetween, and induced voltages of a second magnetic field (700), generated by a target metal object, on the receiving coils (201, 202) are superimposed with one another. The sensitivity to a target object can be improved, and a measurement blind zone is not formed, which significantly improves the measurement accuracy.
Description
本发明涉及检测定位领域,尤其涉及一种金属传感器。The invention relates to the field of detection and positioning, and in particular to a metal sensor.
金属探测器主要用于对金属类物体进行定位,现有的探测器分成很多类别,也通过多种原理进行操作。比如,其主要组成部件为传感器,传感器通过线圈来构成的,使用发射线圈来发射连续的交变场,该交变场由接收线圈接收,相对于发射线圈,此接收线圈布置成使得在没有由待测物体产生影响的情况下,在接收线圈上产生感应电压相互抵消,使得感应电压输出接近为0,有待测物体产生影响的情况下,待测物体就会改变原来的交变场,更准确来说,待测物体会产生另一个交变的场,这种交变场会传递到接收线圈,并在接收线圈上产生感应电压,通过放大并相应进行分析。Metal detectors are mainly used to locate metal objects. Existing detectors are divided into many categories and operate through a variety of principles. For example, the main component is a sensor, the sensor is formed by a coil, and the transmitting coil is used to emit a continuous alternating field. The alternating field is received by the receiving coil. The receiving coil is arranged such that it is not When the object to be tested has an influence, the induced voltages on the receiving coil cancel each other out, so that the induced voltage output is close to zero. If the object to be measured has an influence, the object to be measured changes the original alternating field, and To be precise, the object to be measured produces another alternating field, which is transmitted to the receiving coil and generates an induced voltage on the receiving coil, which is amplified and analyzed accordingly.
图1为现有技术中的传感器结构示意图,其几何结构为:由两组反向的第一接收线环1和第二接收线环2组成的接收线圈***,第一接收线环1和第二接收线环2在共同的平面3中彼此同轴地布置,发射机线圈4位于该共同的接收机平面3之上一定距离z处,该发射机线圈同样与第一接收线环1和第二接收线环2同轴地布置。第一接收线环1的绕组在此例如设置为顺时针方向缠绕,则第二接收线环2的绕组需采用逆时针方向缠绕,使得在这些绕组中所感生的电压具有相反的符号,且在适当确定尺寸后在不存在外部目标物的情况下能达到彼此补偿而不输出感应电压。通过该传感器定位物体存在如下的缺陷:(1)由于发射线圈产生一个很大的交变场,而被测物通过感
应产生的反向场是极其微小的,所以当探测极其微弱的被测物产生的交变场时,接收线圈一定要忽略巨大的发射线圈产生的交变场,使得接收线圈和发射线圈不存在感应耦合,现有技术中线圈布局方式中,必需使第一接收线环1和第二接收线环2相反的绕向,这样也务必抵消由目标物产生的交变场,降低探测的灵敏度,目标物在某个特定的位置,接收线圈中感应第二磁场的感应电压处于完全抵消状态,这样就会形成测量的盲区,探测不到目标物,而实际上目标物是存在的,也就是说,存在测量盲点或者灵敏度最极低区域;(2)由于第一线圈第二线圈同轴不同半径,改变磁通量主要是通过改变面积来实现的,为了到达较大范围的补偿,2个线圈的半径差不能太小,只能通过增大电路板的尺寸来实现,这样必然占用电路板空间。1 is a schematic structural view of a sensor in the prior art, the geometry of which is: a receiving coil system consisting of two sets of inverted first receiving wire loop 1 and second receiving wire loop 2, first receiving wire loop 1 and The two receiving wire loops 2 are arranged coaxially to one another in a common plane 3, the transmitter coil 4 being situated at a distance z above the common receiver plane 3, the transmitter coil also being identical to the first receiving wire loop 1 and The two receiving wire loops 2 are arranged coaxially. The windings of the first receiving wire loop 1 are here, for example, arranged to be wound clockwise, and the windings of the second receiving wire loop 2 are wound in a counterclockwise direction, so that the voltages induced in these windings have opposite signs and After appropriately sizing, it is possible to compensate each other without outputting an induced voltage in the absence of an external target. The object positioned by the sensor has the following defects: (1) because the transmitting coil generates a large alternating field, and the measured object passes the sense
The reverse field that should be generated is extremely small, so when detecting the alternating field generated by the extremely weak object, the receiving coil must ignore the alternating field generated by the huge transmitting coil, so that the receiving coil and the transmitting coil do not exist. Inductive coupling, in the coil layout of the prior art, the first receiving wire loop 1 and the second receiving wire loop 2 must be reversed, so that the alternating field generated by the target must be cancelled, and the sensitivity of the detecting is reduced. When the target is at a specific position, the induced voltage of the second magnetic field in the receiving coil is completely canceled, so that a dead zone of measurement is formed, and the target is not detected, but the target actually exists, that is, There is a blind spot or the most extremely low sensitivity area; (2) Since the second coil of the first coil is coaxial with different radii, changing the magnetic flux is mainly achieved by changing the area. In order to reach a larger range of compensation, the radius of the two coils The difference can not be too small, can only be achieved by increasing the size of the board, which inevitably occupies board space.
发明内容Summary of the invention
本发明针对现有技术中的不足,提供一种金属传感器,接收线圈之间布置具有相同的绕向,对于目标金属物产生的第二磁场,并在接收线圈上产生感应电压相互叠加,能提高对目标物的灵敏度,而且不会形成测量的盲区,大大提高了测量的精度。The present invention is directed to the deficiencies in the prior art, and provides a metal sensor in which the receiving coils are arranged with the same winding direction, and the second magnetic field generated for the target metal object is superimposed on the receiving coil to generate an induced voltage. Sensitivity to the target, and does not form a blind spot of measurement, greatly improving the accuracy of the measurement.
为了解决上述技术问题,本发明通过下述技术方案得以解决:In order to solve the above technical problems, the present invention is solved by the following technical solutions:
一种金属传感器,具有彼此感应耦合的至少一个发射线圈和至少一个接收线圈***,所述接收线圈***包括位于同一平面的至少一个第一接收线圈和至少一个第二接收线圈,所述发射线圈在所述平面上形成投影,所述第一接收线圈在所述平面上形成的区域包含所述的投影,所述第二接收线圈在所述平面上形成的区域布置在所述投影的周围,所述第一接收线圈和第二接收线圈电连接。A metal sensor having at least one transmitting coil and at least one receiving coil system inductively coupled to each other, the receiving coil system including at least one first receiving coil and at least one second receiving coil in a same plane, the transmitting coil being a projection is formed on the plane, an area formed by the first receiving coil on the plane includes the projection, and an area formed by the second receiving coil on the plane is disposed around the projection, The first receiving coil and the second receiving coil are electrically connected.
优选的,所述第一接收线圈在所述平面上形成的区域全部包含所述的投
影。Preferably, the area formed by the first receiving coil on the plane all includes the cast
Shadow.
优选的,所述第一接收线圈在所述平面上形成的区域部分包含所述的投影。Preferably, the portion of the region formed by the first receiving coil on the plane contains the projection.
优选的,所述第二接收线圈在所述平面上形成的区域为一个,所述的区域呈开口环绕在所述投影的周围。Preferably, the second receiving coil has a region formed on the plane, and the region is surrounded by an opening around the projection.
优选的,所述第二接收线圈在所述平面上形成的区域为至少两个,所述的区域依次分布在所述投影的周围。Preferably, the second receiving coil has at least two regions formed on the plane, and the regions are sequentially distributed around the projection.
进一步的,所述第一接收线圈和/或第二接收线圈和/或第一与第二接收线圈的连接线上分别设有1个输出级。Further, one output stage is respectively disposed on the connection line of the first receiving coil and/or the second receiving coil and/or the first and second receiving coils.
进一步的,所述第一接收线圈设有至少2个输出级,所述第二接收线圈设有至少2个输出级。Further, the first receiving coil is provided with at least two output stages, and the second receiving coil is provided with at least two output stages.
进一步的,包括开关装置,所述第一接收线圈、第二接收线圈上的输出级分别与开关装置相连。Further, the switching device is included, and the output stages on the first receiving coil and the second receiving coil are respectively connected to the switching device.
进一步的,所述开关装置为Mos管或三级管。Further, the switching device is a Mos tube or a tertiary tube.
进一步的,包括分析电路,所述接收线圈***的输出级通过开关装置与所述分析电路相连。Further, an analysis circuit is included, and an output stage of the receiving coil system is connected to the analysis circuit through a switching device.
进一步的,包括分析电路,所述接收线圈***的输出级与所述分析电路相连。Further, an analysis circuit is included, and an output stage of the receiving coil system is connected to the analysis circuit.
进一步的,所述分析电路包括运算放大器和处理器。Further, the analysis circuit includes an operational amplifier and a processor.
进一步的,所述发射线圈嵌入式安装在印制电路板上。Further, the transmitting coil is embedded in a printed circuit board.
一种测量设备,包括上述所述的传感器。A measuring device comprising the sensor described above.
进一步的,所述测量设备是手持式定位设备。Further, the measuring device is a handheld positioning device.
本发明取得如下的有益效果:The present invention achieves the following beneficial effects:
对于目标物产生的第二磁场,由于线圈的同向绕向,使得其产生的感应电动势相互叠加,进而增强接收线圈对目标物的磁场感应的灵敏度,且不会
形成测量的盲区,大大提高了测量的准确性;同时第一接收线圈和第二接收线圈布置在电路板上,针对外置绕线接收线圈,具有位置的精度非常高,目前可以做到0.1mm以上,大大提高了产品的一致性,也可以更好的抵消第一磁场产生的感应电压,布置在电路板上可以降低成本。The second magnetic field generated by the target is superimposed by the coils in the same direction, so that the induced electromotive force generated by the coils is superimposed on each other, thereby enhancing the sensitivity of the receiving coil to the magnetic field induction of the target, and
Forming the blind zone of the measurement greatly improves the accuracy of the measurement; at the same time, the first receiving coil and the second receiving coil are arranged on the circuit board, and the precision of the position is very high for the external winding receiving coil, which can be 0.1 mm at present The above greatly improves the consistency of the product, and can better offset the induced voltage generated by the first magnetic field, and the cost can be reduced by being arranged on the circuit board.
本发明的附加方面和优点将在下面的描述中部分给出,部分将从下面的描述中变得明显,或通过本发明的实践了解到。The additional aspects and advantages of the invention will be set forth in part in the description which follows.
此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:
图1为现有技术金属传感器的结构示意图;1 is a schematic structural view of a prior art metal sensor;
图2为本发明一种金属传感器实施例一的结构示意图;2 is a schematic structural view of a first embodiment of a metal sensor according to the present invention;
图3为本发明一种金属传感器实施例二的结构示意图;3 is a schematic structural view of a second embodiment of a metal sensor according to the present invention;
图4为本发明一种金属传感器实施例一对应的接收线圈***连接示意图;4 is a schematic diagram showing the connection of a receiving coil system corresponding to a metal sensor according to an embodiment of the present invention;
图5为本发明一种金属传感器实施例二对应的接收线圈***连接示意图;5 is a schematic diagram showing the connection of a receiving coil system corresponding to the second embodiment of the metal sensor of the present invention;
图6为本发明一种金属传感器实施例一几何结构对应的原理构造图;6 is a schematic structural diagram of a geometrical structure corresponding to a metal sensor according to the present invention;
图7为本发明一种金属传感器实施例二几何结构对应的原理构造图;7 is a schematic structural diagram of a geometrical structure corresponding to a metal sensor according to a second embodiment of the present invention;
图8为本发明一种金属传感器实施例一对应的检测示意图;8 is a schematic diagram of detection of a metal sensor according to a first embodiment of the present invention;
图9为本发明一种金属传感器实施例二对应的检测示意图;9 is a schematic diagram of detection of a second embodiment of a metal sensor according to the present invention;
图10为本发明分析方法的矢量图;Figure 10 is a vector diagram of the analysis method of the present invention;
图11为本发明检测方法检测信号的测量曲线。
Figure 11 is a measurement curve of a detection signal of the detection method of the present invention.
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例的附图,对本发明实施例的技术方案进行清楚、完整地描述。显然,所描述的实施例是本发明的一部分实施例,而不是全部的实施例。基于所描述的本发明的实施例,本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护的范围。The technical solutions of the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention.
在本发明的描述中,需要理解的是,术语“上”、“下”、“前”、“后”、“左”、“右”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" The orientation or positional relationship of the instructions is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the present invention and the simplified description, rather than indicating or implying that the device or component referred to has a specific orientation, The orientation and construction of the orientation are not to be construed as limiting the invention.
在本发明中,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本发明中的具体含义。In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or connected integrally; may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
在本发明中,除非另有明确的规定和限定,第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触,也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且,第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方,或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方,或仅仅表示
第一特征水平高度小于第二特征。In the present invention, the first feature "on" or "under" the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and below the second feature, or simply
The first feature level is less than the second feature.
除非另作定义,此处使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本发明专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性,而只是用来区分不同的组成部分。同样,“一个”或者“一”等类似词语也不表示数量限制,而是表示存在至少一个。Unless otherwise defined, technical terms or scientific terms used herein shall be taken to mean the ordinary meaning of the ordinary skill in the art to which the invention pertains. The words "first", "second" and similar terms used in the specification and claims of the present invention do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the words "a" or "an" and the like do not denote a quantity limitation, but mean that there is at least one.
对于本领域中的所有技术人员来说,已知的事实是术语“场线”不应在字面上理解,这是因为在一定程度上,“场线”仅更简单地表示相同磁性强度和极性的区域。由于此原因,在本发明的以下描述中,此术语将用来表示磁密度。为了更好地描述,仅用一个绕组来表示线圈。将容易理解,本发明视作其起点线圈具有多个绕组,或线圈“印刷”在板上。交变信号可在线圈中操作;场线在单个时钟相位的过程中表示。It is a known fact for all those skilled in the art that the term "field line" should not be understood literally, since to some extent the "field line" only more simply represents the same magnetic strength and pole. Sexual area. For this reason, in the following description of the invention, this term will be used to denote the magnetic density. For better description, only one winding is used to represent the coil. It will be readily understood that the present invention is considered to have its starting coil having a plurality of windings, or the coils being "printed" on the board. The alternating signal can operate in the coil; the field lines are represented during the course of a single clock phase.
作为本发明的实施例,如图2所示,大大简化的原理图示出用于定位金属物体的本发明传感器的传感器几何结构的第一实施例。一种金属传感器,具有彼此感应耦合的一个发射线圈100和一个接收线圈***200,本实施例以一个发射线圈100和一个接收线圈***200为例进行说明,但本发明的传感器并不局限一个。本发明的接收线圈***200包括位于同一平面的一个第一接收线圈201和一个第二接收线圈202,所述发射线圈100在所述平面上形成投影,所述第一接收线圈201在所述平面上形成的区域全部包含所述的投影,当然还可以是部分包含所述的投影,所述第二接收线圈202在所述平面上形成的区域为一个,且所述的区域呈开口环绕在所述投影的周围,且第一接收线圈201和第二接收线圈202电连接,同理接收线圈***200并不局限包括位于同一平面的一个第一接收线圈201和一个第二接收线圈202,其组成可以为两个或多个。As an embodiment of the invention, as shown in Fig. 2, a greatly simplified schematic diagram shows a first embodiment of the sensor geometry of the sensor of the invention for positioning a metal object. A metal sensor having a transmitting coil 100 and a receiving coil system 200 inductively coupled to each other. This embodiment is described by taking one transmitting coil 100 and one receiving coil system 200 as an example, but the sensor of the present invention is not limited to one. The receiving coil system 200 of the present invention includes a first receiving coil 201 and a second receiving coil 202 on the same plane, the transmitting coil 100 forming a projection on the plane, the first receiving coil 201 being in the plane The above-formed regions all include the projections, and of course may also partially include the projections, the second receiving coil 202 has one area formed on the plane, and the area is surrounded by an opening. Around the projection, and the first receiving coil 201 and the second receiving coil 202 are electrically connected, the receiving coil system 200 is not limited to include a first receiving coil 201 and a second receiving coil 202 in the same plane, which constitute Can be two or more.
作为本发明的实施例,如图3所示,大大简化的原理图示出用于定位金
属物体的本发明传感器的传感器几何结构的第二实施例。一种金属传感器,具有彼此感应耦合的一个发射线圈100和一个接收线圈***200,本实施例以一个发射线圈100和一个接收线圈***200为例进行说明,但本发明的传感器并不局限一个。本发明的接收线圈***200包括位于同一平面的一个第一接收线圈201和一个第二接收线圈202,所述发射线圈100在所述平面上形成投影,所述第一接收线圈201在所述平面上形成的区域全部包含所述的投影,当然还可以是部分包含所述的投影,所述第二接收线圈202在所述平面上形成的区域为两个,分别为第二接收线圈(202',202”),所述的区域依次分布在所述投影的周围,且第一接收线圈201和第二接收线圈(202',202”)电连接,同理接收线圈***200并不局限包括位于同一平面的一个第一接收线圈201和两个第二接收线圈第二接收线圈(202',202”),其组成可以为三个或多个。As an embodiment of the present invention, as shown in FIG. 3, a greatly simplified schematic diagram for positioning gold
A second embodiment of the sensor geometry of the sensor of the invention belonging to the object. A metal sensor having a transmitting coil 100 and a receiving coil system 200 inductively coupled to each other. This embodiment is described by taking one transmitting coil 100 and one receiving coil system 200 as an example, but the sensor of the present invention is not limited to one. The receiving coil system 200 of the present invention includes a first receiving coil 201 and a second receiving coil 202 on the same plane, the transmitting coil 100 forming a projection on the plane, the first receiving coil 201 being in the plane The above-formed regions all include the projections. Of course, the projections may be partially included. The second receiving coil 202 has two regions formed on the plane, respectively being the second receiving coils (202'. , 202"), the regions are sequentially distributed around the projection, and the first receiving coil 201 and the second receiving coil (202', 202") are electrically connected, and the receiving coil system 200 is not limited to include One first receiving coil 201 and two second receiving coils second receiving coils (202', 202") of the same plane may be composed of three or more.
在本实施例中,如图3所示的布局时,最优方式是第二接收线圈(202',202”)组关于发射线圈100对称分布,在各种因素比如湿度,温度,会影响发射线圈100的磁场,如果成对称,更好抵消掉这种影响,当然不对称的也可以实现。在具体实施的过程中,有时候为提高灵敏度,在维持感应电压的平衡的前提下,增加接收线圈***如第一接收线圈201或第二接收线圈(202,202',202”)的扎数和线圈所包含的面积,能提高测量的灵敏度。In this embodiment, when the layout is as shown in FIG. 3, the optimal mode is that the second receiving coil (202', 202") group is symmetrically distributed with respect to the transmitting coil 100, and the various factors such as humidity and temperature may affect the emission. The magnetic field of the coil 100, if it is symmetrical, better offsets this effect, of course, the asymmetry can also be achieved. In the specific implementation process, sometimes to increase the sensitivity, while maintaining the balance of the induced voltage, increase the reception The number of wires of the coil system such as the first receiving coil 201 or the second receiving coil (202, 202', 202") and the area enclosed by the coil can improve the sensitivity of the measurement.
本实施例的发射线圈100位置设置可以是位于该共同的接收平面之上一定距离处,且与接收线圈***200呈平行布置,印制电路上设有至少两个供所述发射线圈100固定安装的定位孔,发射线圈100的引脚***到定位孔中并焊接在电路板上;发射线圈100还可以是直接布置在印制电路板上的导线结构或者嵌入设置在印制电路板中,这些方式都可以的。The position setting of the transmitting coil 100 of this embodiment may be located at a certain distance above the common receiving plane and arranged in parallel with the receiving coil system 200. At least two of the printed circuit are provided for fixed mounting of the transmitting coil 100. a positioning hole, a pin of the transmitting coil 100 is inserted into the positioning hole and soldered on the circuit board; the transmitting coil 100 may also be a wire structure directly disposed on the printed circuit board or embedded in the printed circuit board. The way is fine.
本发明的第一接收线圈201和第二接收线圈202具有相同绕向,对于实施例一对应的连接方式,如图4所示,第一接收线圈201的感应电压的正极
连接到第二接收线圈202的感应电压的负极,线圈的感应电压相加,同理对于实施例二对应的连接方式,如图5所示。在这种连接方式中可以看出,对于接收线圈感应第一磁场的感应电压来说,这样连接方式又可以抵消感应电压,对于第二磁场感应电压是叠加的,所以既能抵消掉感应第一磁场的感应电压,又能增加感应第二磁场的感应电压,大大提高检测的灵敏度。The first receiving coil 201 and the second receiving coil 202 of the present invention have the same winding direction. For the corresponding connection manner of the first embodiment, as shown in FIG. 4, the positive electrode of the induced voltage of the first receiving coil 201 is as shown in FIG.
Connected to the negative pole of the induced voltage of the second receiving coil 202, the induced voltages of the coils are added, and the connection manner corresponding to the second embodiment is similar to that shown in FIG. 5. In this connection mode, it can be seen that for the induced voltage of the receiving coil to induce the first magnetic field, the connection mode can cancel the induced voltage, and the induced voltage of the second magnetic field is superimposed, so that the first sensing can be cancelled out. The induced voltage of the magnetic field can increase the induced voltage of the second magnetic field, which greatly improves the sensitivity of the detection.
如图6和7所示,对于目标物产生的第二磁场,感应电压公式是根据E=nΔΦ/Δt,E:感应电动势(V),n:感应线圈匝数,ΔΦ/Δt:磁通量的变化率,由于线圈的同向绕向,它们产生的感应电动势相互叠加,所以会增强接收线圈对目标物的磁场感应的灵敏度,不会形成测量的盲区,大大提高了测量的准确性;且第一接收线圈和第二接收线圈布置在电路板上,针对外置绕线接收线圈,具有位置的精度非常高,目前可以做到0.1mm以上,大大提高了产品的一致性,也可以更好的抵消第一磁场产生的感应电压,布置在电路板上可以降低成本。As shown in Figures 6 and 7, for the second magnetic field generated by the target, the induced voltage formula is based on E = n ΔΦ / Δt, E: induced electromotive force (V), n: number of induction coil turns, ΔΦ / Δt: change in magnetic flux Rate, due to the co-directional winding of the coils, the induced electromotive forces generated by them are superimposed on each other, so the sensitivity of the receiving coil to the magnetic field induction of the target object is enhanced, the blind area of the measurement is not formed, and the measurement accuracy is greatly improved; The receiving coil and the second receiving coil are arranged on the circuit board, and the precision of the position is very high for the external winding receiving coil, and can be more than 0.1 mm at present, which greatly improves the consistency of the product and can better offset The induced voltage generated by the first magnetic field can be reduced on the circuit board.
在本实施例在,如图8所示,图中的黑色的点表示是连接点也就是输出级,一般是在线圈的开始和末端会设置,图中在第一接收线圈201上一般设置至少一个连接点,如果设置成一个连接点,一般设置在线圈的开始位置,设置点越多,可以校准的范围也就越大,一般设置3个点为宜,对应实施例一的所述第一接收线圈201设有3个输出级(11,22,33),输出级的位置间隔越小,可以校准的精度越高,一般为大约相隔大约为一圈为宜,且间隔保持一致。图中第二接收线圈202上一般设置至少一个连接点,如果设置成一个连接点,则可设置在线圈的末端位置,一般设置3~10个左右,对应实施例一的所述第二接收线圈202设有3个输出级(44,55,66),为达到更好的校准效果,可将输出级连接点设置在满足以下条件的位置:在没有金属存在的情况下,所述第二接收线圈上间隔最远的输出级间感应的电压与所述第一接收线圈上间隔最近的2个输出级间感应的电压基本相等;或者所述第一接
收线圈上间隔最远的输出级间感应的电压与所述第二接收线圈上间隔最近的2个输出级间感应的电压基本相等,第二接收线圈上的连接点的位置间隔越小,可以校准的精度越高,那么需要的连接点也就越多,一般为大约相隔大约为一圈为宜,且间隔保持一致。In the present embodiment, as shown in FIG. 8, the black dots in the figure indicate that the connection points, that is, the output stages, are generally disposed at the beginning and the end of the coil, and the first receiving coil 201 is generally disposed at least in the figure. A connection point, if set as a connection point, is generally set at the beginning of the coil. The more the set point, the larger the range that can be calibrated. Generally, it is preferable to set 3 points, corresponding to the first one of the first embodiment. The receiving coil 201 is provided with three output stages (11, 22, 33). The smaller the position interval of the output stage, the higher the accuracy of the calibration, and it is generally about one turn apart, and the interval is consistent. In the figure, at least one connection point is generally disposed on the second receiving coil 202. If it is set as a connection point, it can be disposed at the end position of the coil, generally about 3 to 10, corresponding to the second receiving coil of the first embodiment. The 202 has three output stages (44, 55, 66). For better calibration, the output stage connection point can be set to a position that satisfies the following conditions: in the absence of metal, the second reception The voltage induced between the output stages furthest apart on the coil is substantially equal to the voltage induced between the two output stages closest to the first receiving coil; or the first connection
The voltage induced between the output stages of the farthest interval on the receiving coil is substantially equal to the voltage induced between the two output stages of the second receiving coil, and the smaller the position interval of the connecting points on the second receiving coil, The higher the accuracy of the calibration, the more connection points are required, generally about one turn apart, and the spacing is consistent.
第一接收线圈201上的3个输出级(11,22,33)分别与开关装置(11ˋ,22ˋ,33ˋ)的一端电连接,三个开关装置的另一端与放大电路500的输入端电连接,放大电路500的输出口与处理器400相连,本实施例的开关装置一般为为Mos管或三级管,处理器400控制开关装置的闭合与开启。本实施例的放大器一般选择高输入阻抗,低噪声,低温漂的运算放大器。The three output stages (11, 22, 33) on the first receiving coil 201 are electrically connected to one ends of the switching devices (11ˋ, 22ˋ, 33ˋ), respectively, and the other ends of the three switching devices are electrically connected to the input terminals of the amplifying circuit 500. The output port of the amplifying circuit 500 is connected to the processor 400. The switching device of the embodiment is generally a Mos tube or a three-stage tube, and the processor 400 controls the closing and opening of the switching device. The amplifier of this embodiment generally selects an operational amplifier with high input impedance, low noise, and low temperature drift.
同理,第二接收线圈202上的3个输出级(44,55,66)分别与开关装置(44ˋ,55ˋ,66ˋ)的一端电连接,三个开关装置的另一端与放大电路500的输入端电连接,放大电路500的输出口与处理器400相连。Similarly, the three output stages (44, 55, 66) on the second receiving coil 202 are electrically connected to one end of the switching device (44ˋ, 55ˋ, 66ˋ), respectively, and the other end of the three switching devices and the input of the amplifying circuit 500. The terminal is electrically connected, and the output of the amplifying circuit 500 is connected to the processor 400.
在未存在待定位物体情况下运行装置,处理器400通过控制各输出级通过开关装置依次对各输出级的输出信号幅值进行检测并存储开关装置设置信息,所述开关装置设置信息为对各输出信号幅值进行比较筛选出的最小幅值输出信号所对应的各开关装置开闭状态信息;根据所述开关装置设置信息控制各开关装置开闭,运行装置进行物体定位。The operating device runs the device in the absence of the object to be located, and the processor 400 sequentially detects the output signal amplitude of each output stage through the switching device by controlling each output stage, and stores the switching device setting information, the switching device setting information is The output signal amplitude is used to compare and filter the open/close state information of each switch device corresponding to the selected minimum amplitude output signal; the switch device is controlled to open and close according to the switch device setting information, and the running device performs object positioning.
具体实施过程如下:The specific implementation process is as follows:
在没有物体存在情况下,驱动发射线圈100,产生交变的磁场,处理器400检测放大电路500输出信号的幅值。The transmitting coil 100 is driven to generate an alternating magnetic field in the absence of an object, and the processor 400 detects the amplitude of the output signal of the amplifying circuit 500.
开启开关装置11ˋ和开关装置44ˋ,关闭其他的开关装置,检测放大电路500输出信号的幅值A1;Turning on the switching device 11A and the switching device 44A, turning off the other switching devices, detecting the amplitude A1 of the output signal of the amplifying circuit 500;
开启开关装置11ˋ和开关装置55ˋ,关闭其他的开关装置,检测放大电路500输出信号的幅值A2;Turning on the switching device 11ˋ and the switching device 55ˋ, turning off the other switching devices, detecting the amplitude A2 of the output signal of the amplifying circuit 500;
开启开关装置11ˋ和开关装置66ˋ,关闭其他的开关装置,检测放大电
路500输出信号的幅值A3;Turn on the switch device 11ˋ and the switch device 66ˋ, turn off the other switch devices, and detect the amplified power.
The amplitude A3 of the output signal of the road 500;
开启开关装置22ˋ和开关装置44ˋ,关闭其他的开关装置,检测放大电路500输出信号的幅值B1;Turning on the switching device 22ˋ and the switching device 44ˋ, turning off the other switching devices, detecting the amplitude B1 of the output signal of the amplifying circuit 500;
开启开关装置22ˋ和开关装置55ˋ,关闭其他的开关装置,检测放大电路500输出信号的幅值B2;Turning on the switching device 22ˋ and the switching device 55ˋ, turning off the other switching devices, detecting the amplitude B2 of the output signal of the amplifying circuit 500;
开启开关装置22ˋ和开关装置66ˋ,关闭其他的开关装置,检测放大电路500输出信号的幅值B3;Turning on the switching device 22ˋ and the switching device 66ˋ, turning off the other switching devices, detecting the amplitude B3 of the output signal of the amplifying circuit 500;
开启开关装置33ˋ和开关装置44ˋ,关闭其他的开关装置,检测放大电路500输出信号的幅值C1;Turning on the switching device 33ˋ and the switching device 44ˋ, turning off the other switching devices, detecting the amplitude C1 of the output signal of the amplifying circuit 500;
开启开关装置33ˋ和开关装置55ˋ,关闭其他的开关装置,检测放大电路500输出信号的幅值C2;Turning on the switching device 33A and the switching device 55A, turning off the other switching devices, detecting the amplitude C2 of the output signal of the amplifying circuit 500;
开启开关装置33ˋ和开关装置66ˋ,关闭其他的开关装置,检测放大电路500输出信号的幅值C3;Turning on the switching device 33ˋ and the switching device 66ˋ, turning off the other switching devices, detecting the amplitude C3 of the output signal of the amplifying circuit 500;
求出最小幅值,得到对应开关装置的状态,并将这种状态存储在非易失性存储器中,在下次工作时,处理器400直接从非易失性存储器中读出开关的状态,大大提高了对目标物探测的灵敏度;本实施例的开关装置的状态有n*m种状态,其中n为位于第一接收线圈上的连接点的个数,m为位于第二接收线圈上的连接点的个数。Finding the minimum amplitude, obtaining the state of the corresponding switching device, and storing the state in the non-volatile memory, the processor 400 directly reads the state of the switch from the non-volatile memory in the next operation, The sensitivity to the detection of the target is improved; the state of the switching device of this embodiment has n*m states, where n is the number of connection points on the first receiving coil, and m is the connection on the second receiving coil. The number of points.
在本实施例在,如图9所示,对于实施例二的装置,由于第二接收线圈202'和第二接收线圈202”基本呈对称设置的,第二接收线圈202'的输出端和第二接收线圈202”的输入端电连接,其他的原理同上面实施例一,在此不再赘述。In this embodiment, as shown in FIG. 9, for the apparatus of the second embodiment, since the second receiving coil 202' and the second receiving coil 202" are substantially symmetrically disposed, the output end of the second receiving coil 202' and the The input ends of the two receiving coils 202" are electrically connected. The other principles are the same as those in the first embodiment, and are not described here.
总之,本发明实施例第一接收线圈201和第二接收线可以在较小的面积内布置多的线圈扎数,且在第一接收线圈201和第二接收线圈(202,202',202”)的线圈不同位置设置开关装置,这样既能较大范围的进行校准,大大
节省了空间,可以增加设置的开关个数,提高调节精度,且可以对感应电压实现双方向校准,大大提高调节精度。In summary, the first receiving coil 201 and the second receiving line of the embodiment of the present invention can arrange a plurality of coil numbers in a small area, and in the first receiving coil 201 and the second receiving coil (202, 202', 202" The coils are arranged at different positions, so that the calibration can be performed over a wide range.
It saves space, can increase the number of switches set, improve the adjustment precision, and can realize bidirectional calibration of the induced voltage, greatly improving the adjustment accuracy.
在本发明实施例中,还包括分析电路,所述分析电路包括运算放大器和处理器,本发明实施例的接收线圈***200的输出级可以通过开关装置与所述分析电路相连。还可以直接与所述分析电路相连,下面以通过开关装置与所述分析电路相连进行说明,处理器可以控制开关装置的开启与闭合,与第一接收线圈201上的连接点连接的开关装置另一端连接到放大电路的输入端,与第二接收线圈202上的连接点连接的开关装置另一端连接到放大电路的另一端输入端,在放大电路的输入端串联一个电容,可以减少接收线圈直流信号的影响,放大器输出端与处理器电连接,运算放大器一般选择高输入阻抗,低噪声,低温漂的运算放大器。In an embodiment of the present invention, an analysis circuit is further included, the analysis circuit includes an operational amplifier and a processor, and an output stage of the receiving coil system 200 of the embodiment of the present invention may be connected to the analysis circuit through a switching device. It can also be directly connected to the analysis circuit, and the following is described by being connected to the analysis circuit through a switching device. The processor can control the opening and closing of the switching device, and the switching device connected to the connection point on the first receiving coil 201 One end is connected to the input end of the amplifying circuit, the other end of the switching device connected to the connection point on the second receiving coil 202 is connected to the other end input end of the amplifying circuit, and a capacitor is connected in series at the input end of the amplifying circuit to reduce the receiving coil DC The effect of the signal, the amplifier output is electrically connected to the processor, and the op amp typically selects a high input impedance, low noise, low temperature drift op amp.
本实施例的第一接收线圈201和第二接收线圈202的线路段具有平面的、单层的绕线几何结构。更是可以在较小的面积内布置多的线圈扎数,本发明可以在较小的面积内布置多的接收线圈的扎数,在开关装置(1'-6')每个线圈组连入电路中扎数,这样既能较大范围的进行调节,又可以节省接收线圈扎数的布置空间,还可以事先调节好每个相邻开关装置之间的长度(扎数)及开关装置的个数来控制调节的范围和精度,即绕组的尺寸精确度非常高,在电路板上精确地制造最大25微米的铜结构在技术上不造成任何问题。The line segments of the first receiving coil 201 and the second receiving coil 202 of the present embodiment have a planar, single-layer winding geometry. Moreover, it is possible to arrange a plurality of coil numbers in a small area, and the present invention can arrange a plurality of receiving coils in a small area, and connect each coil group in the switching device (1'-6'). The number of wires in the circuit can be adjusted in a larger range, and the arrangement space of the number of receiving coils can be saved, and the length (number of times) and the number of switching devices of each adjacent switching device can be adjusted in advance. The range and accuracy of the control are controlled, that is, the dimensional accuracy of the winding is very high, and it is technically not problematic to accurately manufacture a copper structure of up to 25 μm on the board.
本发明通过下面的方法对传感器的测量信号进行分析,该分析方法为:通过数字地生成频率F1的激励信号,驱动发射线圈,产生交变的磁场,以及对所述传感器的分析电路的测量放大器的输出信号进行相位同步的模数转换,所述测量放大器的输出信号的相位同步的模数转换以频率f1=nF1进行转换并输出转换信号,其中n≥2,n为整数。对是否有目标的数据进行分析,在无目标物体时,如图10所示,对所述转换信号进行频谱分析,得到频率为F1的信号的矢量,在复平面里表示为矢量信号A(Vx1,Vy1);在有目标物
体时,对所述转换信号进行频谱分析,得到频率为F1的信号的矢量,在复平面表示为矢量信号矢量信号B(Vx2,Vy2);将矢量信号A、B相减,得到新的矢量信号C(Vx2-Vx1,Vy2-Vy1)。分析矢量信号C的幅值变化,记录矢量信号C的幅值变化中的第一波峰值和第二波峰值所在平面位置一和二,将平面位置一、二的中点位置信息作为介质中物体的最接近位置信息输出。The invention analyzes the measurement signal of the sensor by the following method: digitally generating an excitation signal of frequency F1, driving the transmitting coil, generating an alternating magnetic field, and measuring amplifier of the analyzing circuit of the sensor The output signal is subjected to phase-synchronized analog-to-digital conversion, and the phase-synchronized analog-to-digital conversion of the output signal of the measuring amplifier is converted at a frequency f1=nF1 and a converted signal is output, where n≥2, n is an integer. Whether or not there is target data is analyzed. When there is no target object, as shown in FIG. 10, spectrum analysis is performed on the converted signal to obtain a vector of a signal of frequency F1, which is represented as a vector signal A (Vx1 in the complex plane). , Vy1); in the presence of the target
In the case of the body, the spectrum of the converted signal is analyzed to obtain a vector of the signal of frequency F1, which is represented as a vector signal vector signal B (Vx2, Vy2) in the complex plane; and the vector signals A and B are subtracted to obtain a new vector. Signal C (Vx2-Vx1, Vy2-Vy1). Analyzing the amplitude change of the vector signal C, recording the first wave peak in the amplitude change of the vector signal C and the plane position one and two of the second wave peak, and using the midpoint position information of the plane position one and two as the medium object in the medium The closest location information output.
当所述矢量信号C的幅值大于设定阈值时,理论上在没有物体存在的情况,C的幅值为0,也就不存在相位,但是在实际中,由于电源的噪声,接收线圈的分布,运放电路的噪声,温度,湿度等等因素的影响,使得矢量信号C不为0,假设设定阈值为W,由于噪声的随机性,所以相位也不确定的,此时也就是没有物体存在,当矢量的幅值大于W,相位也满足条件时,此时认为有物体存在。When the amplitude of the vector signal C is greater than a set threshold, theoretically, in the absence of an object, the amplitude of C is zero, and there is no phase, but in practice, due to the noise of the power supply, the receiving coil Distribution, the noise of the op amp circuit, temperature, humidity and other factors, so that the vector signal C is not 0, assuming the threshold is set to W, due to the randomness of the noise, the phase is also uncertain, at this time there is no The object exists. When the magnitude of the vector is greater than W and the phase also satisfies the condition, then an object is considered to exist.
不同的电路参数,不同的接收线圈分布,测量同一物体,相位也是不一样的,所以在电路确定以后,分别测量磁导率最大和磁导率最小的金属物体,并记录下他们的相位值,就可以得到金属物体所覆盖相位范围,所以当矢量C的幅值大于W时,却相位位于所覆盖第一相位区间范围之内,此时就可以判断有金属存在,所述第一相位区间的两端值分别为待检测物体为磁导率最大和磁导率最小的金属时矢量信号C的相位值;同理,分别测量磁导率最大和磁导率最小的磁性金属,并记录下他们的相位值,就可以得到物体所覆盖相位范围,所以当矢量C的幅值大于W时,却相位位于所覆盖第二相位区间范围之内,此时就可以判断有磁性金属存在,其中所述第二相位区间的两端值分别为待检测物体为磁导率最大和磁导率最小的磁性金属时矢量信号C的相位值,同理,分别测量磁导率最大和磁导率最小的非磁性金属,并记录下他们的相位值,就可以得到物体所覆盖相位范围,所以当矢量C的幅值大于W时,却相位位于所覆盖第三相位区间范围之内,此时就可以判断有非磁性金属存在,其中所述第三相位区间的两端值分别为待检测物体为磁导率最
大和磁导率最小的非磁性金属时矢量信号C的相位值,由此区分目标物为磁性金属还是非磁性金属,通过本发明的分析方法,能准确得出被检测物的性质,且精度高。Different circuit parameters, different receiving coil distributions, measuring the same object, the phase is also different, so after the circuit is determined, the metal objects with the largest magnetic permeability and the smallest magnetic permeability are respectively measured, and their phase values are recorded. The phase range covered by the metal object can be obtained, so when the amplitude of the vector C is greater than W, but the phase is within the range of the first phase interval covered, it can be judged that there is metal, and the first phase interval The values of the two ends are the phase values of the vector signal C when the object to be detected is the metal with the largest magnetic permeability and the lowest magnetic permeability. Similarly, the magnetic metals with the largest magnetic permeability and the smallest magnetic permeability are measured, and they are recorded. The phase value of the phase can be obtained, so when the amplitude of the vector C is greater than W, but the phase is within the range of the second phase interval covered, it can be judged that the presence of magnetic metal exists. The values of the two ends of the second phase interval are the phase values of the vector signal C when the object to be detected is the magnetic material with the largest magnetic permeability and the smallest magnetic permeability, and so on. Measuring the non-magnetic metal with the largest magnetic permeability and the smallest magnetic permeability, and recording their phase values, the phase range covered by the object can be obtained, so when the amplitude of the vector C is greater than W, the phase is at the third coverage. Within the range of the phase interval, it can be judged that there is a non-magnetic metal, wherein the two ends of the third phase interval are respectively the magnetic permeability of the object to be detected.
The phase value of the vector signal C of the non-magnetic metal having the smallest and largest magnetic permeability, thereby distinguishing whether the target is a magnetic metal or a non-magnetic metal, and the analysis method of the present invention can accurately obtain the property of the detected object with high precision. .
在本实施例中,本发明的传感器通过如下的检测方法来检测被包围在介质中的物体,本发明的检测方法如下:通过分析测量信号来获得被包围物体的属性和位置信息,所述测量信号为所述传感器检测状态时接收线圈端产生的信号与预设信号相减后得到的矢量信号,所述预设信号为未存在物体情况下传感器接收线圈端产生的信号。In the present embodiment, the sensor of the present invention detects an object enclosed in a medium by the following detection method. The detection method of the present invention is as follows: the attribute and position information of the enclosed object are obtained by analyzing the measurement signal, the measurement The signal is a vector signal obtained by subtracting a signal generated by the receiving coil end from the preset signal when the sensor detects the state, and the preset signal is a signal generated by the sensor receiving coil end in the absence of the object.
当所述测量信号的幅值大于设定阈值时,输出判断信号显示介质中存在物体,对所述测量信号的相位进行分析,当所述测量信号的相位在第一相位区间内时输出判断信号显示介质中物体为金属,否则输出判断信号显示介质中物体为没有金属物体存在;所述第一相位区间的两端值分别为待检测物体为磁导率最大和磁导率最小的金属时测量信号的相位值。When the amplitude of the measurement signal is greater than a set threshold, the output determination signal displays an object in the medium, analyzes the phase of the measurement signal, and outputs a determination signal when the phase of the measurement signal is within the first phase interval. The object in the display medium is metal, otherwise the output judgment signal indicates that the object in the medium is no metal object; the two ends of the first phase interval are respectively measured when the object to be detected is the metal with the largest magnetic permeability and the smallest magnetic permeability. The phase value of the signal.
当所述测量信号的幅值大于设定阈值时,输出判断信号显示介质中存在物体,对所述测量信号的相位进行分析,当所述测量信号的相位在第二相位区间内时输出判断信号显示介质中物体为磁性金属,所述第二相位区间的两端值分别为待检测物体为磁导率最大和磁导率最小的磁性金属时测量信号的相位值。当所述测量信号的相位在第三相位区间内时输出判断信号显示介质中物体为非磁性金属,所述第三相位区间的两端值分别为待检测物体为磁导率最大和磁导率最小的非磁性金属时测量信号的相位值。通过本发明的该检测方法还能根据相位值可以区分磁性金属和非磁性金属。When the amplitude of the measurement signal is greater than a set threshold, the output determination signal displays an object in the medium, analyzes the phase of the measurement signal, and outputs a determination signal when the phase of the measurement signal is within the second phase interval. The object in the display medium is a magnetic metal, and the two ends of the second phase interval are phase values of the measurement signal when the object to be detected is a magnetic metal having the largest magnetic permeability and the smallest magnetic permeability. When the phase of the measurement signal is in the third phase interval, the output judgment signal indicates that the object in the medium is a non-magnetic metal, and the two ends of the third phase interval are respectively the magnetic permeability and the magnetic permeability of the object to be detected. The phase value of the signal is measured with the smallest non-magnetic metal. The detection method of the present invention can also distinguish between magnetic metal and non-magnetic metal based on the phase value.
同时,分析测量信号的幅值变化,记录测量信号的幅值变化中的第一波峰值和第二波峰值所在平面位置一和二,将平面位置一、二的中点位置信息作为介质中物体的最接近位置信息输出。如图11所示,通过本发明的传感器,在有目标物不位于接收线圈的下方时,当接收线圈***越靠近目标物,矢量
C的幅值也就越大,当接收线圈远离目标物,矢量C的幅值也就越小;当金属由接收线圈边缘朝接收线圈移动时,矢量C的幅值是由小变大,当矢量C的幅值突然由大变小,说明物体接近第二接收线圈***的中心点,此时标记为中点的起点,当矢量C的幅值突然由小变大,说明目标物处于第二接收线圈的中心位置,当矢量C的幅值突然由大变小,说明目标物远离第二接收线圈,此时标记为中点的终点。At the same time, the amplitude change of the measurement signal is analyzed, and the first wave peak and the second wave peak position in the amplitude change of the measurement signal are recorded, and the midpoint position information of the plane position one and two is used as the medium object in the medium. The closest location information output. As shown in FIG. 11, with the sensor of the present invention, when the target object is not located below the receiving coil, the closer the receiving coil system is to the target, the vector
The larger the amplitude of C is, the smaller the amplitude of vector C is when the receiving coil is far away from the target; when the metal moves from the edge of the receiving coil toward the receiving coil, the amplitude of vector C becomes smaller from small to large. The amplitude of the vector C suddenly changes from large to small, indicating that the object is close to the center point of the second receiving coil system. At this time, it is marked as the starting point of the midpoint. When the amplitude of the vector C suddenly increases from small to large, the target is in the second position. The center position of the receiving coil, when the amplitude of the vector C suddenly changes from large to small, indicating that the target is away from the second receiving coil, and is marked as the end point of the midpoint.
本发明的传感器可以有利地被集成到测量设备中。在此,这种测量设备可以尤其是被构造为手持式金属定位设备,或者包含本发明传感器的金属定位能力作为附加功能。此外还可以并且有利的是,将本发明传感器也集成到机床中、例如集成到钻孔工具中,以便使应用者能够利用该机器安全地工作。The sensor of the invention can advantageously be integrated into a measuring device. In this case, the measuring device can be embodied in particular as a hand-held metal positioning device or as a further function comprising the metal positioning capability of the sensor of the invention. In addition, it is also possible and advantageous to integrate the sensor of the invention into a machine tool, for example into a drilling tool, in order to enable the user to work safely with the machine.
本发明使得能够实现成本低的传感器,该传感器通过以下方式使尽可能多的成本高的部件和设备元件成为多余,即传感器的电路板不仅被用作电子电路的载体材料,而且作为功能部分是传感器的整体的组成部分。根据本发明的用于定位金属物体的传感器仅仅需要单个线圈。这特别是通过用传感器的分析电路的电路板上的导线组代替如现有技术中公开的、典型地缠绕的接收线圈。The invention makes it possible to realize a low-cost sensor which makes it possible to replace as many costly components and device components as possible, that is to say that the sensor circuit board is used not only as a carrier material for the electronic circuit but also as a functional part. The integral part of the sensor. A sensor for positioning a metal object according to the present invention requires only a single coil. This is in particular by replacing the typically wound receiving coil as disclosed in the prior art by means of a wire set on the circuit board of the sensor's analysis circuit.
最后应说明的是:以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present invention.
总之,以上所述仅为本发明的较佳实施例,凡依本发明申请专利范围所作的均等变化与修饰,皆应属本发明专利的涵盖范围。
In summary, the above description is only the preferred embodiment of the present invention, and all changes and modifications made by the scope of the present invention should be covered by the present invention.
Claims (15)
- 一种金属传感器,具有彼此感应耦合的至少一个发射线圈和至少一个接收线圈***,所述接收线圈***包括位于同一平面的至少一个第一接收线圈和至少一个第二接收线圈,所述发射线圈在所述平面上形成投影,其特征在于:所述第一接收线圈在所述平面上形成的区域包含所述的投影,所述第二接收线圈在所述平面上形成的区域布置在所述投影的周围,所述第一接收线圈和第二接收线圈电连接。A metal sensor having at least one transmitting coil and at least one receiving coil system inductively coupled to each other, the receiving coil system including at least one first receiving coil and at least one second receiving coil in a same plane, the transmitting coil being Forming a projection on the plane, wherein: an area formed by the first receiving coil on the plane includes the projection, and an area formed by the second receiving coil on the plane is disposed at the projection Around the first receiving coil and the second receiving coil are electrically connected.
- 根据权利要求1所述的传感器,其特征在于:所述第一接收线圈在所述平面上形成的区域全部包含所述的投影。The sensor according to claim 1, wherein the area formed by said first receiving coil on said plane all comprises said projection.
- 根据权利要求1所述的传感器,其特征在于:所述第一接收线圈在所述平面上形成的区域部分包含所述的投影。The sensor of claim 1 wherein the portion of the region formed by the first receiving coil on the plane comprises the projection.
- 根据权利要求1-3任一项所述的传感器,其特征在于:所述第二接收线圈在所述平面上形成的区域为一个,所述的区域呈开口环绕在所述投影的周围。A sensor according to any one of claims 1 to 3, wherein the second receiving coil has a region formed on the plane, and the region is surrounded by an opening around the projection.
- 根据权利要求1-3任一项所述的传感器,其特征在于:所述第二接收线圈在所述平面上形成的区域为至少两个,所述的区域依次分布在所述投影的周围。The sensor according to any one of claims 1 to 3, characterized in that the second receiving coil has at least two regions formed on the plane, and the regions are sequentially distributed around the projection.
- 根据权利要求4或5所述的传感器,其特征在于:所述第一接收线圈和/或第二接收线圈和/或第一与第二接收线圈的连接线上分别设有1个输出级。The sensor according to claim 4 or 5, characterized in that each of the first receiving coil and/or the second receiving coil and/or the first and second receiving coils is provided with one output stage.
- 根据权利要求4或5所述的传感器,其特征在于:所述第一接收线圈设有至少2个输出级,所述第二接收线圈设有至少2个输出级。The sensor according to claim 4 or 5, characterized in that the first receiving coil is provided with at least two output stages, and the second receiving coil is provided with at least two output stages.
- 根据权利要求7所述的传感器,其特征在于:包括开关装置,所述输出级分别与开关装置相连。 The sensor according to claim 7, comprising switching means, said output stages being respectively connected to the switching means.
- 根据权利要求8所述的传感器,其特征在于:所述开关装置为Mos管或三级管。The sensor according to claim 8, wherein said switching device is a Mos tube or a tertiary tube.
- 根据权利要求9所述的传感器,其特征在于:包括分析电路,所述接收线圈***的输出级通过开关装置与所述分析电路相连。A sensor according to claim 9 including an analysis circuit, the output stage of said receiving coil system being coupled to said analysis circuit via a switching device.
- 根据权利要求6所述的传感器,其特征在于:包括分析电路,所述接收线圈***的输出级与所述分析电路相连。The sensor of claim 6 including an analysis circuit, the output stage of said receive coil system being coupled to said analysis circuit.
- 根据权利要求11所述的传感器,其特征在于:所述分析电路包括运算放大器和处理器。The sensor of claim 11 wherein said analysis circuit comprises an operational amplifier and a processor.
- 根据权利要求12所述的传感器,其特征在于:所述发射线圈嵌入式安装在印制电路板上。The sensor of claim 12 wherein said transmitting coil is embedded in a printed circuit board.
- 一种测量设备,包括权利要求1-13中任一项所述的传感器。A measuring device comprising the sensor of any of claims 1-13.
- 根据权利要求14的测量设备,其特征在于:所述测量设备是手持式定位设备。 A measuring device according to claim 14, characterized in that said measuring device is a hand-held positioning device.
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Families Citing this family (11)
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---|---|---|---|---|
CN105182428B (en) * | 2015-07-29 | 2019-01-01 | 金华马卡科技有限公司 | A kind of sensor, for analyte sensors measuring signal method and detection object method |
CN105301665B (en) * | 2015-07-29 | 2019-01-01 | 金华马卡科技有限公司 | A kind of metal sensor and the method for the besieged object in the medium of metal sensor detection |
CN107831547A (en) * | 2017-09-22 | 2018-03-23 | 永康市卓图工贸有限公司 | The method that a kind of metal detector and metal detector compensate to its detection coil |
CN108227013A (en) * | 2018-01-29 | 2018-06-29 | 中国科学院电子学研究所 | A kind of reception device for transient electromagnetic exploration |
CN109143382B (en) * | 2018-06-19 | 2020-12-08 | 华为技术有限公司 | Detection coil, detection device and detection system |
CN110187395B (en) * | 2019-06-24 | 2020-12-01 | 安徽理工大学 | Zero-magnetic-flux shallow transient electromagnetic test coil and test method thereof |
CN111812722A (en) * | 2020-01-04 | 2020-10-23 | 深圳市度彼电子有限公司 | Wall detector and method for positioning metal target center by using same |
CN111399069A (en) * | 2020-03-20 | 2020-07-10 | 惠州市迈测科技有限公司 | Metal detection device |
CN112925031A (en) * | 2021-02-04 | 2021-06-08 | 福州昱新电子有限公司 | Metal positioning device and method |
WO2023000193A1 (en) * | 2021-07-21 | 2023-01-26 | 深圳市杜比激光有限公司 | Wall body metal detector and target positioning method therefor |
CN116314147A (en) * | 2022-12-26 | 2023-06-23 | 莱弗利科技(苏州)有限公司 | High-voltage inductance isolator |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050062469A1 (en) * | 2003-09-23 | 2005-03-24 | Anderson Peter Traneus | System and method for hemisphere disambiguation in electromagnetic tracking systems |
CN101031823A (en) * | 2004-09-29 | 2007-09-05 | 罗伯特·博世有限公司 | Sensor for locating metallic objects and method for evaluating measurement signals of a sensor of this type |
CN101840002A (en) * | 2010-06-10 | 2010-09-22 | 尹武良 | Detection device and method for suspect metal object in shoe based on electromagnetic sensor |
US20130154649A1 (en) * | 2011-12-19 | 2013-06-20 | Minelab Electronics Pty Limited | Transmit signal of a metal detector |
CN204832544U (en) * | 2015-07-29 | 2015-12-02 | 金华马卡科技有限公司 | A metal sensor for location |
CN105182428A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Sensor, method for analyzing measurement signal of sensor, and method for detecting object |
CN105182448A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Device for positioning object, and method for positioning object through device |
CN204945412U (en) * | 2015-07-29 | 2016-01-06 | 金华马卡科技有限公司 | A kind of device for positioning object |
CN105301665A (en) * | 2015-07-29 | 2016-02-03 | 金华马卡科技有限公司 | Metal sensor and method for detecting object enclosed in medium therethrough |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004047188B4 (en) * | 2004-09-29 | 2022-10-27 | Robert Bosch Gmbh | Device for locating metallic objects |
DE102005007803A1 (en) * | 2005-02-21 | 2006-08-24 | Robert Bosch Gmbh | Method for detecting objects enclosed in a medium and measuring device for carrying out the method |
CN101776770B (en) * | 2010-02-26 | 2012-07-25 | 重庆大学 | Electromagnetic prospecting sending-receiving integration method and device |
DE102010043078A1 (en) * | 2010-10-28 | 2012-05-03 | Robert Bosch Gmbh | Sensor device, in particular metal sensor, with field compensated magnetic field sensor |
DE102012001202A1 (en) * | 2011-08-10 | 2013-02-14 | Gerd Reime | Sensor for locating metallic objects and associated coil |
-
2015
- 2015-07-29 CN CN201510454444.7A patent/CN105182427B/en active Active
- 2015-08-18 WO PCT/CN2015/087330 patent/WO2017016000A1/en active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050062469A1 (en) * | 2003-09-23 | 2005-03-24 | Anderson Peter Traneus | System and method for hemisphere disambiguation in electromagnetic tracking systems |
CN101031823A (en) * | 2004-09-29 | 2007-09-05 | 罗伯特·博世有限公司 | Sensor for locating metallic objects and method for evaluating measurement signals of a sensor of this type |
CN101840002A (en) * | 2010-06-10 | 2010-09-22 | 尹武良 | Detection device and method for suspect metal object in shoe based on electromagnetic sensor |
US20130154649A1 (en) * | 2011-12-19 | 2013-06-20 | Minelab Electronics Pty Limited | Transmit signal of a metal detector |
CN204832544U (en) * | 2015-07-29 | 2015-12-02 | 金华马卡科技有限公司 | A metal sensor for location |
CN105182428A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Sensor, method for analyzing measurement signal of sensor, and method for detecting object |
CN105182448A (en) * | 2015-07-29 | 2015-12-23 | 金华马卡科技有限公司 | Device for positioning object, and method for positioning object through device |
CN204945412U (en) * | 2015-07-29 | 2016-01-06 | 金华马卡科技有限公司 | A kind of device for positioning object |
CN105301665A (en) * | 2015-07-29 | 2016-02-03 | 金华马卡科技有限公司 | Metal sensor and method for detecting object enclosed in medium therethrough |
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