CN203274677U - Rotation shaft angle position sensing device and sensing system - Google Patents
Rotation shaft angle position sensing device and sensing system Download PDFInfo
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- CN203274677U CN203274677U CN201320276377.0U CN201320276377U CN203274677U CN 203274677 U CN203274677 U CN 203274677U CN 201320276377 U CN201320276377 U CN 201320276377U CN 203274677 U CN203274677 U CN 203274677U
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Abstract
The utility model provides a sensor which is used for sensing the angle position of a rotation shaft and a sensing system. A magnetic block is fixedly arranged on the rotation shaft, wherein the magnetic block can rotate along with the rotation of the rotation shaft. The sensor comprises a magnet device and a Hall effect sensing element. The Hall effect sensing element is used for sensing the angle position of the rotation shaft. When the magnetic block rotates with the rotation shaft, the magnetic field generated by the magnet device makes a change. The Hall effect sensing element generates an electrical signal with the change of the magnetic field. The electrical signal indicates the angle position of the rotation shaft. According to the utility model, due to the fact that the sensor adopts a built-in U-shaped back magnetic technology, the sensing precision of the sensor is greatly improved; and by adopting an IC chip which is provided with the Hall effect sensing element, the precision requirement of rotation shaft angle position measuring can be met.
Description
Technical field
The utility model relates generally to sensing apparatus and the sensing system of the angle position of rotating shaft, and sensing apparatus and the sensing system of the angle that relates more specifically to utilize the sensing change of magnetic field strength to survey rotating shaft.
Background technology
The angle position that utilizes the variation in sensing magnetic field to survey rotating shaft is known in the industry.In general, the sensing system of existing rotating shaft angle position comprises magnet and sensing circuit; Wherein magnet is arranged on and is arranged in rotating shaft (selecting on trace as gearbox medium gear), and rotating shaft can be rotated around its axle center, also can move along its axis, and is arranged on and sensing circuit separates the position that is adjacent to magnet.Like this, the magnet that rotates with the rotation of rotating shaft produces change of magnetic field strength at the sensing circuit place, thus make sensing circuit along with the variation of magnetic field intensity output electrical signals, with the angle position of indication rotating shaft.
Although the sensing system of existing rotating shaft angle position can satisfy the opertaing device needs of (as controlling automobile), but the some shortcomings part is arranged.The first, surrounding environment has Magnetic Field Source because gear is selected trace, the change of magnetic field strength that may disturb magnet to produce when rotating, thus have influence on sensing precision and the sensitivity of sensing circuit.The second, because magnetic pole along axial displacement and the vibrations of rotating shaft, also can have influence on sensing precision and the sensitivity of sensing circuit.
In addition, use two Hall circuits that are arranged on two chips that are separated from each other (IC) that the electric signal of two-way complementation is provided in existing sensing circuit, these two IC that are separated from each other are arranged on a circuit printing plate abreast.Because two IC are arranged side by side, so two IC can sense different magnetic field intensitys, such arranging can have a negative impact to the build-up tolerance (or tolerance) of sensing system.And, because two IC are arranged side by side, so require magnet along rotating shaft certain length to be arranged axially.
Therefore, be necessary to provide a kind of angle position sensing circuit and sensing system of rotating shaft, this sensing circuit and sensing system have overcome the angle position sensing circuit of existing rotating shaft and defective and the deficiency that sensing system exists.
The utility model content
The purpose of this utility model is to provide a kind of sensor and sensing system for sensing rotating shaft angle position.
The utility model provides a kind of sensor for sensing rotating shaft angle position, is fixedly installed magnetic inductive block in described rotating shaft, can rotate along with the rotation of rotating shaft, and described sensor comprises: magnet arrangement; With the Hall effect sensing part, be used for the angle position of sensing rotating shaft; When described magnetic inductive block rotated along with rotating shaft, the magnetic field that described magnet arrangement produces changed, and described Hall effect sensing part produces electric signal along with the variation in magnetic field, the angle position of the described rotating shaft of described electric signal indication.
Further, described magnet arrangement is U-shaped magnet; Described Hall effect sensing part is arranged on the zero magnetic field position of described U-shaped magnet.
Further, described sensor comprises sensor housing and the printed circuit board (PCB) that is arranged in described sensor housing; Described Hall effect sensing part is arranged on described printed circuit board (PCB) and the surface of extending described printed circuit board (PCB), thereby is inserted into U-shaped magnet from a side of U-shaped magnet.
Further, described sensor is provided with sensor housing, the U-shaped opening of described U-shaped magnet is positioned at the top of described sensor housing, described Hall effect sensing part is arranged on the top of described printed circuit board (PCB), make the Hall effect sensing part insert U-shaped magnet from the apical position of the U-shaped opening of described U-shaped magnet, thereby make described Hall effect sensing part be in the zero magnetic field position of U-shaped magnet.
Further, described Hall effect sensing part is arranged on a chip (IC), and the sensitive surface of described IC is arranged on the zero magnetic field position of U-shaped magnet.
Further, magnet arrangement is comprised of three blocks of magnet, forms U-shaped magnet.
Further, described Hall effect sensing part comprises a delivery outlet, and described delivery outlet is divided into two passages.
Further, described two passages provide the output signal of two complementations.
Further, a passage in described two passages comprises the filtering circuit that is connected with described delivery outlet; Another passage of described two passages comprises the voltage stabilizing regulating circuit that is connected with described delivery outlet series connection, lower edge switch circuit and filtering circuit.
Further, described sensor also comprises the magnetic inductive block that is arranged in rotating shaft.
Further, the electric signal of described Hall effect sensing part generation is the electric signal that sine or cosine represent.
The utility model also provides a kind of sensing system for sensing rotating shaft angle position, and this sensing system comprises sensor and the magnetic inductive block that is arranged in rotating shaft, and described magnetic inductive block can rotate along with the rotation of rotating shaft; Described sensor comprises: magnet arrangement; With the Hall effect sensing part, be used for the angle position of sensing rotating shaft; Described magnetic inductive block is arranged on the position that is adjacent to described sensor discretely, when described magnetic inductive block rotates along with rotating shaft, described magnetic inductive block changes the magnetic field that described magnet arrangement produces, the variation in described Hall effect sensing part sensing magnetic field also produces electric signal, the angle position of the described rotating shaft of described electric signal reflection.
Further, described sensor is provided with sensor housing; Described magnet arrangement and described Hall effect sensing part are arranged in described sensor housing; Described magnetic inductive block is arranged on the position that is adjacent to described sensor housing discretely.
Further, described magnet arrangement is U-shaped magnet; Described Hall effect sensing part is arranged on the zero magnetic field position of described U-shaped magnet.
Further, described sensor comprises sensor housing and the printed circuit board (PCB) that is arranged in described sensor housing; Described Hall effect sensing part is arranged on described printed circuit board (PCB) and the surface of extending described printed circuit board (PCB), thereby is inserted into U-shaped magnet from a side of U-shaped magnet.
Further, the U-shaped opening of described U-shaped magnet is positioned at the top of sensor housing, described Hall effect sensing part is arranged on the top of described printed circuit board (PCB), make the Hall effect sensing part insert U-shaped magnet from the apical position of the U-shaped opening of described U-shaped magnet, thereby make described Hall effect sensing part be in the zero magnetic field position of U-shaped magnet.
Further, described Hall effect sensing part has two passages, is used for providing the output signal of two complementations.Further, separate a space between described sensor and described magnetic inductive block.
Further, the electric signal of described Hall effect sensing part generation is the electric signal that sine or cosine represent.
Sensing apparatus and sensing system for sensing rotating shaft angle position of the present utility model has following useful technique effect at least: magnet arrangement of the present utility model is not arranged on rotating shaft, avoid axial displacement and the vibrations of magnetic pole along rotating shaft, improved the sensing precision of sensing circuit; Further, magnet is arranged on sensor housing inside, the magnetic interference of having avoided near the Magnetic Field Source the gear trace that magnet is produced; The utility model uses U-shaped magnet (having zero magnetic field position), and changes of magnetic field is that the magnetic field saltus step is large, thereby has improved sensing precision and sensitivity from zero magnetic field position saltus step; The utility model uses a Hall effect sensing part so that the two-way complementary signal to be provided, and has simplified circuit; The utility model uses an IC chip (this IC chip is provided with a Hall effect sensing part), thereby eliminated, two IC chips (comprising two Hall effect sensing parts) are arranged side by side the location tolerance that produces when installing, improved the sensing precision, and eliminated because axial two chips arranged side by side cause the signal that causes in axle fringe region magnetic field induction difference asynchronous, thereby greatly extended the axial usable range of rotating shaft; In addition, because the utility model has only used an IC chip (need not to be arranged side by side two IC chips) that is provided with a Hall effect sensing element, thereby reduced to be arranged on the axial dimension of magnetic inductive block in rotating shaft; In the utility model, be arranged on the interior magnet arrangement of sensor for generation of magnetic field, the magnetic inductive block that is arranged in rotating shaft only is used for changing magnetic field (need not to produce magnetic field), therefore can significantly reduce to be arranged on the circumferential size of magnetic inductive block in rotating shaft.
By providing with upper sensor and sensing system, the utility model has overcome top mentioned defective of the prior art.Above and other purpose of the present utility model, feature and advantage become apparent those skilled in the art after with the embodiment below reading and accompanying drawing.
Description of drawings
With reference to accompanying drawing, the utility model embodiment is described, wherein:
Figure 1A-1B is according to the side direction of the sensing system 100 of an embodiment of the present utility model and axially concise and to the point diagram;
Fig. 2 A-2C has described an embodiment who magnet arrangement of the present utility model is fit into sensor housing, and wherein Fig. 2 A illustrates the stereographic map according to an embodiment of sensor housing of the present utility model; Fig. 2 B illustrates the stereographic map according to an embodiment of U-shaped magnet of the present utility model; Fig. 2 C illustrates the stereographic map of the sensor housing that the U-shaped magnet in Fig. 2 B is housed;
Fig. 3 A-3C has described sensing circuit potted element 304 has been arranged on an embodiment on the PCB circuit board, and wherein Fig. 3 A illustrates the stereographic map of an embodiment of PCB circuit board; Fig. 3 B illustrates the stereographic map of an embodiment of sensing circuit potted element 304; And Fig. 3 C illustrates the PCB circuit board of the sensing circuit potted element 304 that is equipped with shown in Fig. 3 B with the stereographic map of an embodiment of formation sensing apparatus;
Fig. 4 illustrates the stereographic map according to the sensor of an embodiment of the utility model, and wherein the U-shaped magnet in Fig. 2 B and the sensing apparatus in Fig. 3 C have been fit into sensor housing;
Fig. 5 A has described the sensing system 100 according to the angle position for the sensing rotating shaft of the present utility model, and rotating shaft 102 in the sensing system 100 of angle position and the side view of magnetic inductive block 104 are shown, and wherein U magnet is not illustrated;
Fig. 5 B shows the sensing system 100 according to the angle position for the sensing rotating shaft of the present utility model ", wherein sensing system 100 " all parts identical with all parts in Fig. 5 A, but U magnet 138 is illustrated;
Fig. 6 A is the schematic diagram of an embodiment of U-shaped magnet of the present utility model; Fig. 6 B is the schematic diagram of another embodiment of U-shaped magnet of the present utility model.
Embodiment
Refer now to specific embodiment, its example shown in the drawings.In the detailed description of specific embodiment, directional terminology, such as " top ", " bottom ", " top ", " below ", " left side ", " the right " etc. used with reference to the described direction of accompanying drawing.Because the parts of the utility model embodiment can be configured to many different directions, directional terminology is used as the purpose of aid illustration and restriction anything but.As much as possible, the same or analogous mark that uses in institute's drawings attached and the same or analogous part of symbolic representation.
Figure 1A-1B has described the sensing system 100 according to the angle position for sensing rotating shaft 102 of the present utility model, and the scheme of installation of these sensing system 100 phase countershafts 102 and magnetic inductive block 104.
As shown in Figure 1A, the sensing system 100 of angle position comprises magnetic inductive block 104 and the sensor 200 that is arranged in rotating shaft 102.Magnetic inductive block 104 can be by ferromagnetic material, and chromium, nickel, iron or other permeability magnetic material are made.Magnetic inductive block 104 is arranged in described rotating shaft 102 and is suitable for around the shaft 102 axle (or axle center) 111 and rotates together with rotating shaft 102.Sensor 200 is arranged on discretely the contiguous position of described magnetic inductive block 104 and is positioned at the top of magnetic inductive block 104, in mutual copline on the direction of Figure 1B, and separates a distance B (or space) 183 with magnetic inductive block 104.
Figure 1B is the axially concise and to the point diagram of the angle position sensing system 100 shown in Figure 1A.All parts in Figure 1B are identical with the parts in Figure 1A, but Figure 1B shows magnet arrangement (or U-shaped magnet) 138.As shown in Figure 1B, sensor 200 comprises a magnet arrangement 138 and Hall effect sensing part 112.Magnet arrangement 138 is a U-shaped magnet, and this U-shaped magnet 138 has zero magnetic field position.In order to improve and improve measuring accuracy and the sensitivity of sensor 200, Hall effect sensing part 112 is arranged in the U-shaped groove 142 (referring to 142 in Fig. 2 B) of U-shaped magnet 138, and is arranged on this zero magnetic field position of U-shaped magnet 138.As shown in Figure 1B, the end that sensor 200 is provided with magnet arrangement 138 is set to be adjacent to magnetic inductive block 104, and the U-shaped groove 142 of this U-shaped magnet 138 is towards also contiguous described magnetic inductive block 104.
As shown in Figure 1A-1B, rotating shaft 102 can be moved as the crow flies along its length direction, and also can rotate around its axle (heart) 111.When magnetic inductive block 104 moves along its length direction as the crow flies along with rotating shaft 102, the magnetic field of Hall effect sensing part 112 positions does not change, because Hall effect sensing part 112 can not detect any change in magnetic flux density and/or changes of magnetic field with respect to magnetic inductive block 104 from the rectilinear motion of rotating shaft 102.Yet, when rotating shaft 102 when its axle (heart) 111 rotates, be magnetic inductive block 104 along with the rotation of rotating shaft 102 when axle (heart) 111 rotates, the magnetic field that magnet arrangement 138 in sensor 200 produces changes, Hall effect sensing part 112 detects change in magnetic flux density and/or changes of magnetic field and produces electric signal
The angle position of the described rotating shaft 102 of this electric signal indication.
An embodiment of the utility model sensor is described below in conjunction with accompanying drawing.
Sensor of the present utility model comprises sensor housing 202, and is fit into magnet arrangement 138 and sensing apparatus 306 in sensor housing 202.With reference to figure 2A-2C, magnet arrangement 138 of the present utility model is mounted in sensor housing 202.As shown in Fig. 2 A, sensor housing 202 comprises base 206 and the shell 204 that is arranged on base 206.Described shell 204 limits a recess (cavity volume) 205 to hold magnet arrangement 138.Fig. 2 B illustrates a U-shaped magnet 138, and this U-shaped magnet 138 has a U-shaped groove 142.Mentioned as mentioned, U-shaped magnet 138 has one zero magnetic field position, and this zero magnetic field position is formed in the U-shaped groove 142 of U-shaped magnet 138.In order to improve and to improve measuring accuracy and sensitivity, Hall effect sensing part 112 is placed on the zero magnetic field position in this U-shaped groove 142.As shown in Fig. 2 C, during cavity volume 205 in U-shaped magnet 138 is fit into shell 204, the U-shaped groove 142 of U-shaped magnet 138 is positioned at the top of sensor housing 202, that is, and and away from an end of sensor housing base 206.When sensor 200 of the present utility model was mounted to top with the rotating shaft 102 of magnetic inductive block 104, in U-shaped magnet 138, the opening of U-shaped groove 142 was towards the direction of magnetic inductive block 104, and near magnetic inductive block 104.The U-shaped groove 142 of U-shaped magnet 138 can be used for receiving Hall effect sensing part 112, for example, the potted element 304 that is provided with Hall effect sensing part 112 can be inserted into U-shaped magnet 138 from the apical position of the U-shaped groove 142 of U-shaped magnet 138, makes this Hall effect sensing part 112 be positioned at the zero magnetic field position of U-shaped magnet 138.In the utility model, magnet arrangement 138 is not arranged in rotating shaft 102, and this has been avoided the magnetic pole of magnet arrangement 138 along axial displacement and the vibrations of rotating shaft 102, thereby has improved the sensing precision of sensor 200.Further, because magnet arrangement 138 of the present utility model is arranged on sensor housing 202 inside, the magnetic interference of having avoided near the Magnetic Field Source the gear trace that magnet arrangement is produced.
Fig. 3 A-3C has described sensing circuit potted element 304 has been installed on PCB circuit board 302 to form an embodiment of sensing apparatus 306.Fig. 3 A illustrates the PCB circuit board 302 of sensing apparatus 306, and this PCB circuit board 302 has the front that the electronic devices and components connection is set, and the back side.In Fig. 3 A, the front (not shown) of PCB circuit board 302 towards under.The front of PCB circuit board 302 is provided with the connection for the sensing control circuit 106 as shown in Fig. 5 A and Fig. 5 B, comprises current rectifying and wave filtering circuit 114, wave filter 116 and 122, voltage stabilizing regulating circuit 118 and lower edge switch circuit 120.Sensing circuit 108 is configured to independently potted element 304 (seeing Fig. 3 B) and is connected to PCB circuit board 302.PCB circuit board 302 shown in Fig. 3 A comprises three incoming ends 312,314 and 316 and four external interfaces 322,324,326 and 328.Three incoming ends 312 of PCB circuit board 302,314 are connected with the exit of the sensing circuit potted element 304 shown in Fig. 3 B respectively with being connected; And outside input supply terminal Vin, GND earth terminal, NPS signal output part 152 and the NPS-K signal output part 154 of the sensing control circuit 106 shown in four external interfaces 322 of PCB circuit board 302,324,326 and 328 difference corresponding diagram 5A or Fig. 5 B.Fig. 3 B illustrates a sensing circuit potted element 304, and this potted element 304 has three exits 142,144 and 146, respectively input end 142, earth terminal 144 and the output terminal 146 of the sensing circuit 108 shown in corresponding diagram 5A or Fig. 5 B.As shown in Figure 3 C, when being installed to sensing circuit potted element 304 on PCB circuit board 302, three exits 142 of sensing circuit potted element 304,144 with are connected respectively with the PCB circuit board on corresponding device incoming end 312,314 with are connected connection, thereby realized installing and connection as the element of the sensing control circuit 106 in Fig. 5 A or Fig. 5 B.As shown in Figure 3 C, sensing circuit potted element 304 is installed on PCB circuit board 302, and extends the surface of PCB circuit board 302, to be used for being inserted into the U-shaped groove 142 of the U-shaped magnet 138 as shown in Fig. 2 C.
Fig. 4 illustrates U-shaped magnet 138 and sensing apparatus 306 is fitted among sensor housing 402.As described above, sensing circuit potted element 304 extends from the surface of PCB circuit board.When the PCB circuit board that sensing circuit potted element 304 will be housed is installed in housing as shown in Fig. 2 C, apical position from the extended sensing circuit potted element 304 of this PCB circuit board surface from the U-shaped groove 142 of U-shaped magnet 138 inserts U-shaped magnet 138, thereby makes Hall effect sensing part 112 in this sensing circuit potted element 304 be positioned at the zero magnetic field position of U-shaped magnet 138.After in U-shaped magnet 138 and sensing apparatus 306 are assembled to housing, form sensor 200 as shown in fig. 1 by sealing (as perfusion).When described sensor 200 is arranged on the contiguous position of described magnetic inductive block 104 separatedly and is positioned at the top of magnetic inductive block 104, PCB circuit board in sensor 200 arranges perpendicular to the axle (heart) 111 of rotating shaft 102, makes the U-shaped groove 142 of this U-shaped magnet 138 towards also contiguous described magnetic inductive block 104.
Below in conjunction with the sensing system 100 of Fig. 5 A-5B explanation according to embodiment of the present utility model, 100 " be used for circuit setting and the principle of work of sensing rotating shaft angle position; wherein the sensing system shown in Fig. 5 A 100 is not provided with U-shaped magnet 138; sensing system 100 shown in Fig. 5 B " all parts identical with parts in Fig. 5 A, but Fig. 5 B shows magnet arrangement (or U-shaped magnet) 138.As shown in Fig. 5 A and 5B, sensing control circuit 106 comprises current rectifying and wave filtering circuit 114, sensing circuit 108, two output channels 148 and 149 (that is, the first and second output channels).The input end of current rectifying and wave filtering circuit 114 is connected with outside input power Vin, obtains direct current stably thereby outside input power Vin is carried out rectifying and wave-filtering, and its output is connected to sensing circuit 108 and provides power supply to all circuit in sensing apparatus 306.Sensing circuit 108 comprises Hall effect sensing part (or Hall circuit) 112 and processor (or DSP) 110.Hall effect sensing part 112 is arranged in the U-shaped groove 142 (referring to 142 in Fig. 2 B) of U-shaped magnet 138 and is positioned at the zero magnetic field position of this U-shaped magnet 138.In one embodiment, sensing circuit 108 (comprising Hall effect sensing part 112) is arranged on an IC, and the sensitive surface of this IC is arranged on the zero magnetic field position of U-shaped magnet.Sensing circuit 108 is arranged in the magnetic field of magnet arrangement 138.
When the angle position of sensing rotating shaft 102, sensing system 100 " in magnet arrangement (or U-shaped magnet) 138 produce magnetic field.When magnetic inductive block 104 when 102 axle 111 rotates together with rotating shaft 102 around the shaft, the position of magnetic inductive block 104 changes with respect to the position of U-shaped magnet 138, make magnet arrangement 138 contiguous magnetic field produce the changes of magnetic field of saltus step, thereby make Hall effect sensing part 112 produce electric signal (electric signal that represents with sinusoidal Sin or cosine Cos) along with the changes of magnetic field of this saltus step; The electric signal that Hall effect sensing part 112 produces is further processed by processor (or DSP) 110, processor (or DSP) 110 is used to indicate the angle position of rotating shaft 102 at its output terminal 146 places output one indication electric signal (switching signal or the linear signal of low-Gao-low saltus step).And when magnetic inductive block 104 moves along its length direction as the crow flies along with rotating shaft 102, Hall effect sensing part 112 can not detect any change in magnetic flux density and/or changes of magnetic field with respect to magnetic inductive block 104 from the rectilinear motion of rotating shaft 102, therefore, processing circuitry 110 keeps its indication electric signal constant at its output terminal 146.In other words, for the rectilinear motion of rotating shaft 102, processing circuitry 110 does not change the output signal on its output terminal 146.
Be imported into the first and second output channels 148 and 149 from the indication electric signal of processor (or DSP) 110 outputs.The first output channel 148 comprises filtering circuit 116, and the indication electric signal of 116 pairs of processors of this filtering circuit (or DSP), 110 outputs carries out filtering to be processed, thereby at output terminal 152 places output the first output signal V
1For example, when sensing apparatus 306 was neutral gear position sensor (NPS), the first output signal was a NPS signal.
The second output channel 149 comprises voltage stabilizing regulating circuit 118, lower edge switch circuit 120 and the filtering circuit 122 that is connected in series.Voltage stabilizing regulating circuit 118 with the voltage of the indication electric signal (switching signal or the linear signal of low-Gao-low saltus step) of processor (or DSP) 110 output from the 12V voltage stabilizing to 5V and output to lower edge switch circuit 120.Lower edge switch circuit 120 carries out low-Gao-low switch signal anti-phase, converts the high-low-high switching signal to, and the high-low-high switching signal of conversion is outputed to filtering circuit 122.According to the utility model, the people of this area can be with the anti-phase low-Gao-low switch signal that converts to of high-low-high switching signal.Thereby 122 pairs of these high-low-high switching signals of filtering circuit are carried out filtering and are processed at output terminal 154 places output the second output signal V
2For example, when sensing apparatus 306 was neutral gear position sensor (NPS), the second output signal was a NPS-K signal.
The first output signal V
1With the second output signal V
2It is the signal of two complementations.In one embodiment, the first output channel 148 directly is connected with the relaying load of customer side; The second output channel 149 is connected with the load of customer side by the applications circuit.For example, the first output signal V
1For 50mA Small current control signal, can be used for client ECU; The second output signal V
2Be the large electric current of 200mA, can directly drive the load of client relay, realized the function of two kinds of client loading interfaces of same sensor control.The utility model uses a Hall effect sensing part 112 that required two-way complementary signal V is provided
1With V
2Thereby, simplified the circuit of sensing apparatus.
Fig. 6 A and 6B illustrate respectively two embodiment of U-shaped magnet.For the ease of making, the U-shaped magnet 600 shown in Fig. 6 A is comprised of three blocks of magnet 602,604 and 606.Thereby the both sides that magnet 602,604 and 606 polar orientation are that arrange in the same way and identical magnet 602 and 604 is separately positioned on magnet 606 form a U-shaped magnet.In another embodiment of U-shaped magnet of the present utility model, as shown in Fig. 6 B, similarly, form a U-shaped magnet 600 ' by three blocks of magnet 602 ', 604 ' and 606 '.Magnet 602 ', 604 ' and 606 ' polar orientation arrange in the same way, and identical magnet 602 ' and 604 ' is separately positioned on the two ends that are positioned at magnet 606 ' on magnet 606 '.Magnet 600,600 ' all has zero field region,, Hall effect sensing part 112 is positioned at magnet 600 or 600 ' zero field region.When magnetic inductive block 104 rotates together along with rotating shaft 102, the position of magnetic inductive block makes the contiguous changes of magnetic field that produces of magnet arrangement 138 with respect to the change in location of U-shaped magnet 138, thereby the magnetic field of the sense position at Hall effect sensing part 112 places is to carry out saltus step from zero magnetic field, makes sensing precision and the sensitivity of sensing element 108 higher.
Usually, in traditional angle position sensing system, because the sensing precision of Hall effect sensing part is limited, need to use two Hall effect sensing parts (being separately positioned on two IC that are separated from each other) so that the electric signal of two-way complementation to be provided, thereby determine signal trip point accurately by the two-way output signal is compared.These two IC that are separated from each other are installed on same printed circuit board (PCB), and this printed circuit board (PCB) vertically is positioned at the contiguous position that is arranged on the magnet in rotating shaft.These two IC that are separated from each other that are arranged on same printed circuit board (PCB) must be arranged side by side with respect to the magnet in rotating shaft.Yet, in the process that IC and circuit board are installed, inevitably can produce location tolerance, thereby further affect the sensing precision.And, because these two IC are arranged side by side, so require to magnet along rotating shaft certain length to be arranged axially.
And in the sensing system of angle position of the present utility model, sensor 200 is owing to adopting built-in U-shaped back of the body magnetic technology, improved greatly the sensing precision of sensor, therefore the IC chip that adopts monolithic to be provided with a Hall effect sensing part just can satisfy the accuracy requirement of measuring the rotating shaft angle position, and do not need to compare again the output of two-way IC chip signal, thereby can save an IC chip that is provided with the Hall effect sensing part.In addition, the utility model is provided with the single IC chip of a Hall effect sensing part due to use, axial two IC chips arranged side by side have been eliminated asynchronous at the signal that axle fringe region magnetic field induction difference causes, thereby greatly extended the axial usable range of rotating shaft, and reduced to be arranged on the axial dimension of the magnetic inductive block in rotating shaft.On the other hand, in the utility model, be arranged on the interior magnet arrangement of sensor for generation of magnetic field, the magnetic inductive block that is arranged in rotating shaft only is used for changing magnetic field (need not to produce magnetic field), therefore also can significantly reduce to be arranged on the axial dimension of the magnetic inductive block in rotating shaft;
Can carry out various changes and modification and not break away from spirit and scope of the present utility model embodiment described herein for a person skilled in the art, this be obvious.Therefore, this instructions intention covers various changes and modification, if such change and modification are in the scope of the claim of enclosing and its equivalent.
Claims (19)
1. sensor (200) that is used for sensing rotating shaft (102) angle position, be fixedly installed magnetic inductive block (104) in described rotating shaft (102), can rotate along with the rotation of rotating shaft (102), it is characterized in that described sensor (200) comprising:
Magnet arrangement (138); With
Hall effect sensing part (112) is for the angle position of sensing rotating shaft (102);
When described magnetic inductive block (104) rotates along with rotating shaft (102), the magnetic field that described magnet arrangement (138) produces changes, described Hall effect sensing part (112) produces electric signal along with the variation in magnetic field, the angle position of the described electric signal described rotating shaft of indication (102).
2. sensor according to claim 1 is characterized in that:
Described magnet arrangement (138) is U-shaped magnet;
Described Hall effect sensing part (112) is arranged on the zero magnetic field position of described U-shaped magnet (138).
3. sensor according to claim 2 is characterized in that:
Described sensor (200) comprises sensor housing (206) and is arranged on printed circuit board (PCB) (302) in described sensor housing (206);
Described Hall effect sensing part (112) is arranged on the surface that described printed circuit board (PCB) (302) were gone up and extended to described printed circuit board (PCB) (302), thereby is inserted into U-shaped magnet (138) from a side of U-shaped magnet (138).
4. sensor according to claim 3, described sensor (200) is provided with sensor housing (206), it is characterized in that:
The U-shaped opening of described U-shaped magnet (138) is positioned at the top of described sensor housing (206), described Hall effect sensing part (112) is arranged on the top of described printed circuit board (PCB) (302), make Hall effect sensing part (112) insert U-shaped magnet (138) from the apical position of the U-shaped opening of described U-shaped magnet (138), thereby make described Hall effect sensing part (112) be in the zero magnetic field position of U-shaped magnet (138).
5. sensor according to claim 4 is characterized in that:
Described Hall effect sensing part (112) is arranged on a chip (IC), and the sensitive surface of described IC is arranged on the zero magnetic field position of U-shaped magnet (138).
6. sensor according to claim 1 is characterized in that:
Magnet arrangement (138) is comprised of three blocks of magnet (602,604,606), forms U-shaped magnet.
7. sensor according to claim 1 is characterized in that:
Described Hall effect sensing part (112) comprises a delivery outlet (146), and described delivery outlet (146) is divided into two passages (148,149).
8. sensor according to claim 7 is characterized in that:
Described two passages (148,149) provide the output signal of two complementations.
9. sensor according to claim 8, wherein:
A passage in described two passages (148,149) comprises the filtering circuit (116) that is connected with described delivery outlet (146);
Another passage of described two passages (148,149) comprises voltage stabilizing regulating circuit (118), lower edge switch circuit (120) and the filtering circuit (122) that series connection is connected with described delivery outlet (146).
10. sensor according to claim 1 is characterized in that:
Described sensor also comprises the magnetic inductive block (104) that is arranged in rotating shaft (102).
11. the described sensor of any one according to claim 1-10 is characterized in that:
The electric signal that described Hall effect sensing part (112) produces is the electric signal that sine or cosine represent.
12. a sensing system that is used for sensing rotating shaft (102) angle position is characterized in that:
Described sensing system comprises sensor (200) and is arranged on magnetic inductive block (104) in rotating shaft (102), and described magnetic inductive block (104) can rotate along with the rotation of rotating shaft (102);
Described sensor (200) comprising:
Magnet arrangement (138); With
Hall effect sensing part (112) is for the angle position of sensing rotating shaft (102);
Described magnetic inductive block (104) is arranged on the position that is adjacent to described sensor (200) discretely,
When described magnetic inductive block (104) rotates along with rotating shaft (102), described magnetic inductive block (104) changes the magnetic field that described magnet arrangement (138) produces, the variation in described Hall effect sensing part (112) sensing magnetic field also produces electric signal, the angle position of the described electric signal described rotating shaft of reflection (102).
13. sensing system according to claim 12 is characterized in that:
Described sensor (200) is provided with sensor housing (206);
Described magnet arrangement (138) and described Hall effect sensing part (112) are arranged in described sensor housing (206);
Described magnetic inductive block (104) is arranged on the position that is adjacent to described sensor housing (206) discretely.
14. sensing system according to claim 12 is characterized in that:
Described magnet arrangement (138) is U-shaped magnet;
Described Hall effect sensing part (112) is arranged on the zero magnetic field position of described U-shaped magnet (138).
15. sensing system according to claim 14 is characterized in that:
Described sensor (200) comprises sensor housing (206) and is arranged on printed circuit board (PCB) (302) in described sensor housing (206);
Described Hall effect sensing part (112) is arranged on the surface that described printed circuit board (PCB) (302) were gone up and extended to described printed circuit board (PCB) (302), thereby is inserted into U-shaped magnet (138) from a side of U-shaped magnet (138).
16. sensing system according to claim 15 is characterized in that:
The U-shaped opening of described U-shaped magnet (138) is positioned at the top of sensor housing (206), described Hall effect sensing part (112) is arranged on the top of described printed circuit board (PCB) (302), make Hall effect sensing part (112) insert U-shaped magnet (138) from the apical position of the U-shaped opening of described U-shaped magnet (138), thereby make described Hall effect sensing part (112) be in the zero magnetic field position of U-shaped magnet (138).
17. sensing system according to claim 14 is characterized in that:
Described Hall effect sensing part (112) has two passages, is used for providing the output signal of two complementations.
18. sensing system according to claim 12 is characterized in that:
Separate a space (183) between described sensor (200) and described magnetic inductive block (104).
19. the described sensing system of any one according to claim 12-17 is characterized in that:
The electric signal that described Hall effect sensing part (112) produces is the electric signal that sine or cosine represent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320276377.0U CN203274677U (en) | 2013-05-20 | 2013-05-20 | Rotation shaft angle position sensing device and sensing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320276377.0U CN203274677U (en) | 2013-05-20 | 2013-05-20 | Rotation shaft angle position sensing device and sensing system |
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| CN203274677U true CN203274677U (en) | 2013-11-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615535A (en) * | 2013-11-29 | 2014-03-05 | 长城汽车股份有限公司 | Position sensor assembly for manual transmission and manual transmission |
| CN104180752A (en) * | 2013-05-20 | 2014-12-03 | 泰科电子(上海)有限公司 | Rotating shaft angle position sensing device and sensing system |
| CN105526852A (en) * | 2014-09-30 | 2016-04-27 | 泰科电子(上海)有限公司 | Neutral-gear reverse-gear position sensing sensor and system thereof |
| CN110858493A (en) * | 2018-08-23 | 2020-03-03 | 神讯电脑(昆山)有限公司 | Information acquisition device |
-
2013
- 2013-05-20 CN CN201320276377.0U patent/CN203274677U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180752A (en) * | 2013-05-20 | 2014-12-03 | 泰科电子(上海)有限公司 | Rotating shaft angle position sensing device and sensing system |
| CN104180752B (en) * | 2013-05-20 | 2018-09-28 | 泰科电子(上海)有限公司 | Shaft angle position sensing device further and sensing system |
| CN103615535A (en) * | 2013-11-29 | 2014-03-05 | 长城汽车股份有限公司 | Position sensor assembly for manual transmission and manual transmission |
| CN105526852A (en) * | 2014-09-30 | 2016-04-27 | 泰科电子(上海)有限公司 | Neutral-gear reverse-gear position sensing sensor and system thereof |
| CN105526852B (en) * | 2014-09-30 | 2019-07-12 | 泰科电子(上海)有限公司 | Neutral gear is reversed gear position sensing sensor and system |
| CN110858493A (en) * | 2018-08-23 | 2020-03-03 | 神讯电脑(昆山)有限公司 | Information acquisition device |
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Address after: Full Place of the First Floor 142 Hedan Road, Waigaoqiao Bonded Zone, Pudong New Area, Shanghai Co-patentee after: TE CONNECTIVITY Corp. Patentee after: Tyco Electronics (Shanghai) Co.,Ltd. Address before: Full Location of the First Floor 142 Hedan Road, Waigaoqiao Free Trade Zone, Pudong New Area, Shanghai, 2001 Co-patentee before: Tyco Electronics Corp. Patentee before: Tyco Electronics (Shanghai) Co.,Ltd. |
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Granted publication date: 20131106 |