CN108593163B - Photoelectric detection metal shaft deformation moment sensor - Google Patents
Photoelectric detection metal shaft deformation moment sensor Download PDFInfo
- Publication number
- CN108593163B CN108593163B CN201810103271.8A CN201810103271A CN108593163B CN 108593163 B CN108593163 B CN 108593163B CN 201810103271 A CN201810103271 A CN 201810103271A CN 108593163 B CN108593163 B CN 108593163B
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- 239000002184 metal Substances 0.000 title claims abstract description 105
- 238000001514 detection method Methods 0.000 title claims abstract description 62
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000000429 assembly Methods 0.000 description 5
- 230000000712 assembly Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a photoelectric detection metal shaft deformation moment sensor which is characterized by comprising a detection sensor, an emitter, a cylinder, an outgoing line, an outer shell, a receiving sensor, a metal shaft, a second bearing and a first bearing, wherein the detection sensor comprises the detection sensor and the emitter, the two ends of the outer shell are provided with the cylinders, the cylinders extend into the outer shell, the two ends of the cylinders and the outer shell are respectively fixed through the first bearing and the second bearing, the invention has the advantages of wide range, high precision, no contact friction, low power consumption and relatively low cost, realizes torque signal output by photoelectric detection of metal deformation, and has simple and reliable metal structure, circuit and software.
Description
Technical Field
The invention relates to the technical field of moment sensors, in particular to a moment sensor for photoelectric detection of metal shaft deformation.
Background
At present, torque detection of an automatic gearbox of an automobile in the market, an automobile steering wheel power assisting system and an electric power assisting bicycle are provided with a torque sensor in a torque mode, and the existing torque sensor mainly comprises: the torque sensor comprises a crank, an active part fixedly connected with the crank, and a passive part arranged in parallel with the active part, wherein the passive part is elastically connected with the active part and can rotate relatively, a plurality of active magnetic assemblies and a plurality of passive magnetic assemblies are respectively arranged on the active part and the passive part, the torque sensor further comprises two Hall elements which are induced by the two groups of magnetic assemblies (the active magnetic assemblies and the passive magnetic assemblies) so as to acquire signals, and the two Hall elements are arranged on a PCB. However, long-term experiments prove that the Hall element of the moment sensor has the defects of weak signal intensity, complex structure, unreliable reaction, poor precision, high cost, friction and the like.
Disclosure of Invention
In view of the above, the invention provides a photoelectric detection metal shaft deformation moment sensor, which is characterized by comprising a detection sensor and an emitter, a cylinder, an outgoing line, an outer shell, a receiving sensor, a metal shaft, a second bearing and a first bearing, wherein the detection sensor and the emitter comprise the detection sensor and the emitter, the two ends of the outer shell are provided with the cylinder, the cylinder extends to the inside of the outer shell, the cylinder and the two ends of the outer shell are respectively fixed through the first bearing and the second bearing, the metal shaft is arranged in the inner part of the outer shell, the cylinder penetrates through the metal shaft, the detection sensor and the emitter are arranged on the inner wall of the outer shell between the second bearing and the metal shaft, the receiving sensor is arranged on the inner wall of the outer shell between the first bearing and the metal shaft, the detection sensor, the emitter and the receiving sensor form the photoelectric sensor, and the outgoing line is arranged in the middle of the outer wall of the outer shell.
For further description of the invention, small holes with uniform intervals are formed in the periphery of the edges of the metal shaft, which is close to the detection sensor and the emitter, and the metal shaft is a metal shaft A; or a circle of grooves with uniform intervals are formed in the edge of the metal shaft, which is close to the detection sensor and the emitter, and the metal shaft is the metal shaft B.
For further description of the invention, when the metal shaft is provided with small holes with uniform intervals at a circle close to the edges of the detection sensor and the emitter, the metal shaft A comprises a detection cut-off point A, a detection starting point A, an emission cut-off point A and an emission starting point A, and small Kong Huoer sensors which are matched are arranged in the small holes of the metal shaft A at one end of the detection sensor and one end of the emitter; when the small Kong Huoer sensor detects the starting edge of the metal shaft A, the emitter of the photoelectric sensor starts to emit a pulse, when the small Kong Huoer sensor detects the ending edge of the metal shaft A, the emitter ends the pulse emission, a complete pulse signal T is completed, the other end receiving sensor receives an optical signal T2, and the transmission signal quantity is T=T2; when the cylinder is distorted by torsion, the metal shaft A is distorted, part of pulse signals are shielded, and at the moment, T > T2, the moment measurement is carried out according to the variation.
When a circle of grooves with uniform intervals are formed in the edge of the metal shaft, which is close to the detection sensor and the emitter, the metal shaft B comprises a detection cut-off point B, a detection start point B, an emission cut-off point B and an emission start point B, and a matched tooth slot Hall sensor is arranged in a tooth slot of the metal shaft B at one end of the detection sensor and one end of the emitter; when the tooth space Hall sensor detects the starting edge of the metal shaft B, the emitter of the photoelectric sensor starts to emit a pulse, when the tooth space Hall sensor detects the ending edge of the metal shaft B, the emitter ends the pulse emission, at the moment, a complete pulse signal T is completed, the other end receiving sensor receives an optical signal T2, and at the moment, the transmitting signal quantity is T=T2; when the cylinder is distorted by torsion, the metal shaft B is distorted, part of pulse signals are shielded, and at the moment, T > T2, the moment measurement is carried out according to the variation.
By adopting the technical scheme, the method has the following beneficial effects: the invention has the advantages of wide measuring range, high precision, no contact friction, low power consumption and relatively low cost, realizes torque signal output by photoelectric detection of metal deformation, and has simple and reliable metal structure, circuit and software.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic side view of a metal shaft A according to the present invention;
FIG. 3 is a schematic side view of a metal shaft B according to the present invention;
FIG. 4 is a schematic diagram of the front view of the detection sensor and emitter according to the present invention;
FIG. 5 is a schematic diagram of a side view of the detection sensor and emitter of the present invention;
FIG. 6 is a schematic diagram of a front view of a receiving sensor according to the present invention;
FIG. 7 is a schematic side view of a receiving sensor of the present invention;
FIG. 8 is a schematic diagram of the circuit principle of the present invention;
FIG. 9 is a schematic diagram of the working waveforms (detection Hall waveform, emission waveform, torsion-free reception waveform and torsion reception waveform) of the present invention;
1-detecting a sensor and an emitter; 2-a cylinder; 20-Metal an axis A; 21-a metal shaft B; 201-detecting a cut-off point A; 202-detection a starting point A; 203-emission cut-off point a; 204-emission start point a; 211-detecting a cut-off point B; 212-detection a start point B;
213—emission cut-off B; 214-emission start point B; 3-outgoing lines; 4-an outer shell; 5-receiving a sensor; 6-a first bearing; 7-a second bearing.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The photoelectric detection metal shaft deformation moment sensor is characterized by comprising a detection sensor and an emitter 1, a cylinder 2, a lead-out wire 3, an outer shell sleeve 4, a receiving sensor 5, a metal shaft 8, a second bearing 7 and a first bearing 6, wherein the detection sensor and the emitter 1 comprise a detection sensor 101 and an emitter 102, the two ends of the outer shell sleeve 4 are provided with the cylinder 2, the cylinder 2 extends to the inside of the outer shell sleeve 4, the two ends of the cylinder 2 and the outer shell sleeve 4 are respectively fixed through the first bearing 6 and the second bearing 7, the metal shaft 8 is arranged in the inner part of the outer shell sleeve 4, the cylinder 2 penetrates through the metal shaft 8, the receiving sensor and the emitter 1 are arranged on the inner wall of the outer shell sleeve 4 between the second bearing 7 and the metal shaft 8, the receiving sensor 5 is arranged on the inner wall of the outer shell sleeve 4 between the first bearing 6 and the metal shaft 8, the detection sensor 101, the emitter 102 and the receiving sensor 5 form a photoelectric sensor, and the lead-out wire 3 is arranged in the middle of the outer shell sleeve 4.
For further description of the invention, the metal shaft 8 is provided with small holes at uniform intervals around the periphery of the edge close to the detection sensor and the emitter 1, and the metal shaft 8 is a metal shaft A20; or a circle of evenly-spaced grooves are formed in the edge of the metal shaft 8, which is close to the detection sensor and the emitter 1, to serve as a metal shaft B21, and the metal shaft 8 is the metal shaft B21.
When the Hall sensor detects that the metal shaft A20 or the metal shaft B21 starts, the photoelectric sensor transmitting end starts to transmit a pulse, and when the Hall sensor detects that the metal shaft A20 or the metal shaft B21 ends to the edge, the photoelectric sensor transmitting end ends to transmit the pulse. At this time, a complete pulse signal T is completed, the other end receiving sensor 5 receives a photoelectric signal T2, the transmitted signal quantity is t=t2 at this time, and when the metal shaft is twisted by torsion, the metal shaft a20 or the metal shaft B21 will have a certain distortion, so that a part of the signal will be blocked, and at this time T > T2. The larger the torque, the larger the deformation and the more signals are blocked. Thereby obtaining a real and reliable moment signal.
As shown in fig. 8, after the detection sensor 101 is powered on to establish a stable power supply, the hall sensor opportunistic state starts to detect the metal shaft a20 or the metal shaft B21, and when a small hole or a tooth slot is detected, the detection sensor is uploaded to the MCU, the MCU sends out a transmitting instruction, the emitter 102 transmits, and the receiving device receives a signal. After receiving the signal, filtering the normal signal through an inverter to obtain a signal which is received by a deduction receiving end, namely the moment signal born by the current metal shaft A20 or the metal shaft B21.
Considering the calculation speed of the MCU, in a half working period, the receiving of the Hall signal, the emitting of the photoelectric and the receiving of the torsion signal can not be quickly performed, the Hall sensor can be skillfully connected with the emitter 102 in series, and the waveform chart shows that when the Hall sensor is at a low level, the emitter 102 is at a high level, so that the MCU can be saved as a monitoring resource.
In order to effectively improve the torsion detection precision, a complete Hall signal can be decomposed into N emission signals, (for example, 100 emission signals are divided in one Hall period, 100 signals are received as 0 torsion, the smaller the received signal unit is, the larger the torsion is, and the like).
The invention has two ways of identifying torque signals: only one signal is transmitted in one Hall signal, and as the distortion deformation of the metal shaft A20 or the metal shaft B21 can shade a part of the signal, the signal is lost in the transmission process, and the most direct expression is that the time of the signal is changed, and the change quantity is the moment actual reading value change quantity; n signals are transmitted in one Hall signal, and as a part of the signals can be shielded due to the distortion and deformation of the metal shaft A20 or the metal shaft B21, the signals are lost in the transmission process, and the most direct expression is that the number of the signals is changed, and the change is the actual moment reading change.
The MCU reverse technology is set, because the received signal is changed from large to small, the output torque signal is changed from small to large, and the output logic can be met only by carrying out reverse processing on the received signal.
Moment value calculation, scheme moment calculation method one: transmit signal = N receive signal = N2 moment value = 1- (N-N2).
Scheme moment calculation method II: transmit signal = received signal = T2 moment value = 1- (T-T2).
When measuring different moments, the structure of the metal shaft A20 or the metal shaft B21 can be lengthened or shortened, and the structure is specifically determined according to the large deformation stress of the metal shaft A20 or the metal shaft B21.
In a first embodiment, the specific working procedure has a small Kong Huoer sensor on the metal axis a20 at one end of the emitter 102, and the emitter 102 is arranged side by side with the small Kong Huoer sensor, the distance between the small Kong Huoer sensor and the emitter is just synchronous with the distance between the small Kong Huoer sensor and the metal axis a20, when the hall sensor detects the detection starting point a (202) of the metal axis a20, the emitting end of the photoelectric sensor starts to emit a pulse, and when the hall sensor detects the detection stopping point a (201) of the metal axis a20, the emitter 102 emits a pulse. At this time, a complete pulse signal T is completed, and the other end receiving sensor 5 receives a photoelectric signal T2. The transfer signal amount is t=t2 at this time. When the cylindrical body 2 is twisted by torsion, the metal shaft a20 will have a certain distortion, so that a part of the signal will be blocked, and T > T2. The receiving sensor 5 is always in a receiving state.
In the second embodiment, the specific working procedure has a tooth-slot hall sensor on the metal axis B21 at one end of the emitter 102, the emitter 102 is parallel to the tooth-slot hall sensor, the distance between the tooth-slot hall sensor and the emitter 102 is just synchronous with the distance between the tooth-slot hall sensor and the metal axis B21, when the hall sensor detects the detection starting point B (212) of the metal axis B21, the emitter 102 starts to emit a pulse, and when the hall sensor detects the detection stopping point B (211) of the metal axis B21, the emitter 102 emits a pulse. At this point the complete one pulse signal T is completed, the other end receiving sensor 5 receives a photoelectric signal T2. The transfer signal amount is t=t2 at this time. When the cylindrical body 2 is twisted by torsion, the metal shaft B21 will have a certain distortion, so that a part of the signal will be blocked, and T > T2. The receiving sensor 5 is always in a receiving state.
FIG. 9 is a schematic diagram of the working waveforms (detection Hall waveform, emission waveform, torsion-free reception waveform and torsion reception waveform) of the present invention; the moment detection is realized by using the Hall sensor, the cylinder 2 and the metal shaft 8, the invention has wider measuring range, high precision, no contact friction, low power consumption and low cost.
Claims (1)
1. The utility model provides a photoelectric detection metal axle deformation moment sensor, its characterized in that, including detecting sensor and projecting pole (1), cylinder (2), lead-out wire (3), shell (4), receiving sensor (5), metal axle (8), second bearing (7) and first bearing (6), detecting sensor and projecting pole (1) are including detecting sensor (101) and projecting pole (102), the both ends of shell (4) are equipped with cylinder (2), cylinder (2) extend to the inside of shell (4), be fixed through first bearing (6) and second bearing (7) respectively between cylinder (2) and shell (4) both ends, the inside of shell (4) is equipped with metal axle (8), cylinder (2) run through in metal axle (8), the inner wall of shell (4) between second bearing (7) and metal axle (8) is equipped with detecting sensor and projecting pole (1), the inner wall (5) between first bearing (6) and metal axle (8) are equipped with detecting sensor (5), sensor (102) and sensor (5) have been constituteed to the outside of shell (4), an outgoing line (3) is arranged in the middle of the outer wall of the outer shell (4);
the metal shaft (8) is provided with small holes at uniform intervals at a periphery close to the edges of the detection sensor and the emitter (1), and the metal shaft (8) is a metal shaft A (20); or a circle of evenly-spaced grooves serving as a metal shaft B (21) are formed in the edge of the metal shaft (8) close to the detection sensor and the emitter (1), and the metal shaft 8 is the metal shaft B (21);
when the metal shaft (8) is provided with small holes with uniform intervals at a circle close to the edges of the detection sensor and the emitter (1), the metal shaft A (20) comprises a detection cut-off point A (201), a detection start point A (202), an emission cut-off point A (203) and an emission start point A (204), and small Kong Huoer sensors which are matched are arranged in the small holes of the metal shaft A (20) at one end of the detection sensor and the emitter (1); when the small Kong Huoer sensor detects the detection starting point A (202) of the metal shaft A (20), the emitter (102) of the photoelectric sensor starts to emit a pulse, when the small Kong Huoer sensor detects the detection stopping point A (201) of the metal shaft A (20), the emitter (102) finishes pulse emission, at the moment, a complete pulse signal T is finished, and the other end receiving sensor (5) receives an optical signal T2, and at the moment, the transmission signal quantity is T=T2; when the cylinder (2) is distorted under the action of torsion, the metal shaft A (20) is distorted and deformed, part of pulse signals are shielded, at the moment, T is more than T2, and moment measurement is carried out according to the variation;
when the metal shaft (8) is provided with a circle of grooves with uniform intervals at the edge close to the detection sensor and the emitter (1), the metal shaft B (21) comprises a detection cut-off point B (211), a detection start point B (212), an emission cut-off point B (213) and an emission start point B (214), and a matched tooth slot Hall sensor is arranged in a tooth slot of the metal shaft B (21) at one end of the detection sensor and the emitter (1); when the tooth space Hall sensor detects a detection starting point B (212) of the metal shaft B (21), an emitter (102) of the photoelectric sensor starts to emit a pulse, when the tooth space Hall sensor detects a detection stopping point B (211) of the metal shaft B (21), the emitter (102) finishes pulse emission, a complete pulse signal T is finished, and the other end receiving sensor (5) receives an optical signal T2, and the transmission signal quantity is T=T2; when the cylinder (2) is twisted by torsion, the metal shaft B (21) is also twisted and deformed, and part of pulse signals are shielded, at this time, T > T2, and moment measurement is performed according to the variation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103271.8A CN108593163B (en) | 2018-02-01 | 2018-02-01 | Photoelectric detection metal shaft deformation moment sensor |
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| CN201810103271.8A CN108593163B (en) | 2018-02-01 | 2018-02-01 | Photoelectric detection metal shaft deformation moment sensor |
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| CN108593163A CN108593163A (en) | 2018-09-28 |
| CN108593163B true CN108593163B (en) | 2024-04-16 |
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| CN108593163A (en) | 2018-09-28 |
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