CN205320575U - Mower - Google Patents
Mower Download PDFInfo
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- CN205320575U CN205320575U CN201521064807.8U CN201521064807U CN205320575U CN 205320575 U CN205320575 U CN 205320575U CN 201521064807 U CN201521064807 U CN 201521064807U CN 205320575 U CN205320575 U CN 205320575U
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- hay mover
- detecting electrode
- capacitance sensor
- processing circuit
- signal
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Abstract
The utility model provides a mower, includes capacitive sensor, processing circuit, controlling means and cutting device, wherein, be close to when external object during capacitive sensor, capacitive sensor's electric capacity changes, processing circuit has input and output, the input with the capacitive sensor electricity is connected, the output with the controlling means electricity is connected, processing circuit is used for the basis capacitive sensor's the corresponding signal of capacitance variation output, controlling means with the cutting device electricity is connected, controlling means is used for receiving the signal, the value that the signal corresponds and preset's threshold value relatively, when the comparative result is expressed to exist external object and is close to, control the cutting device stop work. Above -mentioned mower, external object is close to during capacitive sensor, can lead to the value that processing circuit's output signal corresponds changes, controlling means control cutting device stops the cutting.
Description
Technical field
This utility model relates to electric tool technical field, particularly relates to a kind of hay mover。
Background technology
Hay mover is a kind of lawn trimming tool, generally includes wheels, casing and cutter plate, it is possible to travels on lawn and cuts meadow。
Compared with tradition hay mover, intelligent grass-removing possesses automatic walking function and the work completing to cut the grass on a lawn that can be autonomous, and artificially need not directly control and operate, manual operation is greatly lowered, is the places such as a kind of applicable family garden, the public lawn instrument that carries out turf-mown maintenance。
But, for traditional intelligent grass-removing, the safety prevention measure for foreign body is good not, when foreign body is near cutter plate, has higher potential safety hazard。
Utility model content
Based on this, it is necessary to good not for the safety prevention measure of foreign body for traditional intelligent grass-removing, when foreign body is near cutter plate, the problem with higher potential safety hazard, it is provided that a kind of hay mover。
A kind of hay mover, including capacitance sensor, signal processing circuit, control device and cutter sweep；Wherein, when foreign body is near described capacitance sensor, the electric capacity of described capacitance sensor produces change；Described signal processing circuit has input and outfan, described input electrically connects with described capacitance sensor, described outfan electrically connects with described control device, described signal processing circuit exports corresponding signal for the capacitance variations according to described capacitance sensor, and sends described signal to described control device；Described control device electrically connects with described cutter sweep, and described control device is used for receiving described signal, value corresponding to described signal with threshold ratio set in advance relatively, comparative result represent exist foreign body near time, control described cutter sweep and quit work。
Above-mentioned hay mover, due to foreign body near described capacitance sensor time, the Parameters variation of described capacitance sensor can be caused, thus capacitance variations。Described capacitance sensor electrically connects the input of described signal processing circuit, the input capacitance change of described signal processing circuit, causes the output signal intensity of described signal processing circuit, and described control device receives the output signal of described signal processing circuit。Value corresponding to described signal with threshold ratio set in advance relatively, represent exist the foreign body that is subject to hay mover injury near time, described control device controls described cutter sweep and stops cutting, thus protecting foreign body。
Wherein in an embodiment, described capacitance sensor includes detecting electrode and reference electrode on the other side, and described detecting electrode is arranged at described cutter sweep and easily injures the side of foreign body。
So, foreign body near cutter sweep time, first described detecting electrode senses this object, causes the capacitance variations of described capacitance sensor。
Wherein in an embodiment, hay mover also includes: shell, and described detecting electrode is the metal detection limit being arranged at described shell near the edge on ground。
So, when foreign body is close or touches this edge, the signal intensity of capacitance sensor will be caused。
Wherein in an embodiment, described shell is metal material, and hay mover also includes the insulating barrier being arranged between described shell and described metal detection limit, and described insulating barrier is for insulating described shell and described metal detection limit。
Foreign body so can be avoided to touch shell and also to cause the signal intensity of described capacitance sensor。
Wherein in an embodiment, described cutter sweep includes the rotating shaft electrically connected with described control device and the cutting blade being connected on described rotating shaft, and described cutting blade can rotate around described rotating shaft, is used for performing cutting operation。
Wherein in an embodiment, the quantity of described cutting blade is one or more, multiple described cutting blades are circumferentially distributed, and described detecting electrode is than described cutting blade near ground, and the distance of described detecting electrode and described rotating shaft is more than or equal to the radius of a circle of described cutting blade。
In this manner it is ensured that foreign body is when cutter sweep, first near described detecting electrode。
Wherein in an embodiment, described detecting electrode is one or more。
Wherein in an embodiment, described detecting electrode is described cutting blade。
So, when foreign body is near cutting blade, causes that capacitive sensor signal changes at the same time it can also be save hay mover part, save cost。
Accompanying drawing explanation
Fig. 1 is the top view of the hay mover with metal detection limit of an embodiment；
Fig. 2 is user's side view of hay mover when metal detection limit in the embodiment shown in Fig. 1；
Fig. 3 is the schematic diagram of signal processing circuit；
Fig. 4 is the output signal schematic representation of signal processing circuit；
Fig. 5 is the top view of the hay mover of another embodiment；
Fig. 6 is the side view of the hay mover of the embodiment shown in Fig. 5；
Fig. 7 is the top view of the hay mover of another embodiment；
Fig. 8 is the side view of the hay mover of the embodiment shown in Fig. 7。
Detailed description of the invention
As described in background, traditional intelligent grass-removing lacks the device effectively detecting foreign body, when foreign body enters by mistake through blade cut coverage, it is easy to foreign objects damages。Therefore, traditional intelligent grass-removing possesses certain potential safety hazard。
For solving the problems referred to above, in the embodiment having, intelligent grass-removing adopts accelerometer detection fuselage inclination angle, when people machine lifted cause that fuselage forms an angle with horizontal plane structure time, blade is stall at once, protects foreign body。Or in further embodiments, back handle adopts metallic conductor, using this conductor as capacitance probe, when foreign body contacting metal handle, causes capacitance variations, shuts down at once, protects foreign body。But, the detection of aforesaid way foreign objects is indirect detection, when foreign body is not lifting machine or not contact handle, when directly trick being stretched into below machine, all cannot detect, it is impossible to effectively protect foreign body。
Further; the present embodiment provides a kind of intelligent grass-removing; the position that its sensor is arranged in intelligent grass-removing foreign body and easily comes to harm near blade; by detecting the capacitance variations of sensor; the output frequency causing signal processing circuit reduces; controlling device and stop cutting according to this FREQUENCY CONTROL blade, thus reaching the purpose of protection foreign body, improving its security protection performance。
Embodiment one
Refer to Fig. 1 to Fig. 4, Fig. 1 is the top view of the hay mover with metal detection limit of the present embodiment, Fig. 2 is user's side view of hay mover when metal detection limit in the present embodiment, Fig. 3 is the schematic diagram of the signal processing circuit 11 of the present embodiment, and Fig. 4 is the output signal schematic representation of the signal processing circuit 11 of the present embodiment。
As shown in Figure 1, Figure 2 and Figure 3, the hay mover of the present embodiment includes capacitance sensor 10, signal processing circuit 11, controls device 12 and cutter sweep (not shown)；Wherein, when foreign body is near capacitance sensor 10, the electric capacity of capacitance sensor 10 produces change；Signal processing circuit 11 has input (not shown) and outfan (not shown), input electrically connects with capacitance sensor 10, outfan electrically connects with controlling device 12, signal processing circuit exports corresponding signal for the capacitance variations according to capacitance sensor 10, and sends the signal to control device 12；Control device 12 electrically connect with cutter sweep, control device and be used for receiving signal, value corresponding to signal and threshold ratio set in advance relatively, comparative result represent exist foreign body near time, control cutter sweep quits work。
Capacitance sensor 10 electrically connects with signal processing circuit 11, and when foreign body is near capacitance sensor 10, the electric capacity of capacitance sensor 10 produces change。In the present embodiment, capacitance sensor 10 includes detecting electrode 14 and reference electrode (not shown) on the other side, reference electrode is connected with the earth terminal controlling device 12, detecting electrode 14 is connected with the input of signal processing circuit 11, detecting electrode 14 is arranged at cutter sweep and easily injures the side of foreign body, so, foreign body near cutter sweep time, first detecting electrode 14 senses this object。Accordingly, when user is near cutter sweep, detecting electrode 14 can also sense user, provides safeguard for user security。
In the present embodiment, hay mover also includes shell 16, for holding the capacitance sensor 10 of hay mover, signal processing circuit 11, controlling device 12 and cutter sweep。Detecting electrode 14 is the metal detection limit being arranged at shell 16 near the edge on ground, and detecting electrode 14 is connected with the input of signal processing circuit 11。So, when foreign body imprudence stretch into inside hay mover, near cutter sweep time, will first near or touch this metal detection limit。Owing to the right opposite of the dielectric constant of medium between electric capacity and two electrodes of capacitance sensor 10, two electrodes is long-pending and distance dependent between two electrodes, when foreign body comes close to or in contact with detecting electrode 14, the change in dielectric constant of medium between two electrodes of capacitance sensor 10 can be caused, and the right opposite between two electrodes of the capacitance sensor 10 being arranged in hay mover amasss and apart from constant, thus the capacitance variations of capacitance sensor 10 can be caused。It should be noted that in other embodiments, the setting of the detecting electrode 14 of capacitance sensor 10 is not limited to this, as long as the position that foreign body easily comes to harm near blade can be detected。
The material of shell 16 can be metal material or nonmetallic materials, for not affecting the normal operation of detecting electrode 14, as long as ensureing that shell 16 and detecting electrode 14 insulate。In the present embodiment, the material of shell 16 is metal material, and is provided with insulating barrier between shell 16 and metal detection limit, for described shell and described metal detection limit being insulated, also cause the signal intensity of capacitance sensor 10 to avoid foreign body to touch shell 16, make hay mover quit work by mistake。
As shown in Figure 3 and Figure 4, the signal processing circuit 11 of hay mover has input and outfan, and input electrically connects with capacitance sensor 10, and outfan electrically connects with controlling device 12, export corresponding signal for the capacitance variations according to capacitance sensor 10, and send the signal to control device 12。In the present embodiment, signal processing circuit 11 includes Schmidt trigger 18, capacitance sensor 10 electrically connects the input of Schmidt trigger 18, Schmidt trigger 18 receives the capacitance signal of capacitance sensor 10, capacitance signal is changed into the rectangle square-wave signal with certain frequency, namely, in the present embodiment, the output signal of signal processing circuit 11 is frequency signal。The outfan (not shown) of Schmidt trigger 18 electrically connects with controlling device 12, and output signal sends to control device 12。When foreign body is near the detecting electrode 14 of capacitance sensor 10, the capacitance variations of capacitance sensor 10, can cause that the output signal frequency of Schmidt trigger 18 reduces。
It should be noted that in other embodiments, the frequency change of output signal is not limited to this, and the frequency of output signal can also increase, or the change of output signal frequency can also be alternate manner。Additionally, in other embodiments, signal processing circuit 11 principle is not limited to this, it is also possible to for the electronic circuit of other principle, the output signal of signal processing circuit 11 can also be other signal such as voltage signal or current signal。
Electrically connect with cutter sweep as in figure 2 it is shown, control device 12, be used for receiving signal, and by value corresponding for this signal and threshold ratio set in advance relatively, comparative result represent exist foreign body near time, control described cutter sweep and quit work。In the present embodiment, when user is not in contact with metal detection limit, Schmidt trigger 18 output signal frequency is in the scope of 600Khz-1Mhz, and correspondingly, presetting the threshold value controlling device 12 is 600Khz, when user is close or touches this metal detection limit, cause output signal frequency to reduce, when output signal frequency value is lower than threshold value 600Khz, namely can determine whether that useful family is near cutter sweep, control device 12 and namely control hay mover brake, stall。
It should be noted that in other embodiments, the output signal frequency of Schmidt trigger 18 is not limited to this scope, and the threshold value controlling the signal frequency that device receives can also be set to other numerical value in advance。And in other embodiments, when controlling value corresponding to the signal that receives of device 12 more than threshold value set in advance, it is also possible to represent there is foreign body near cutter sweep, as long as can recognise that the user near cutter sweep or animal。
In the present embodiment, cutter sweep includes and controls the rotating shaft (not shown) that device 12 electrically connects and the cutting blade (not shown) being connected on rotating shaft, and cutting blade, near ground, can rotate around rotating shaft, is used for performing cutting operation。
Above-mentioned hay mover, due to foreign body near capacitance sensor 10 time, the Parameters variation of capacitance sensor 10 can be caused, thus capacitance variations, capacitance sensor 10 is as the input of signal processing circuit 11。The input capacitance change of signal processing circuit 11, causes that the output frequency of signal processor circuit reduces, and controls device 12 and receive the output frequency of signal processing circuit 11。When signal processing circuit 11 output frequency lower than control device 12 setting threshold value time, represent exist be subject to hay mover injury foreign body close, control device 12 control cutter sweep stop cutting, thus protecting foreign body。
Embodiment two
Different from embodiment one, in the present embodiment, the detecting electrode 22 of capacitance sensor is scattered Spot electrodes, is arranged on cutting blade 24 peripheral。
Refer to the top view of the hay mover that Fig. 5 and Fig. 6, Fig. 5 are the present embodiment, Fig. 6 is the side view of the hay mover of the embodiment shown in Fig. 5。
In the present embodiment, hay mover includes capacitance sensor (not shown), signal processing circuit 25, controls device 26 and cutter sweep (not shown), their setting and annexation can refer to embodiment one, and the principle of signal processing circuit 25 can also refer to embodiment one。
In the present embodiment, cutter sweep includes and controls the rotating shaft (not shown) that device 26 electrically connects and the cutting blade 24 being connected on rotating shaft, and cutting blade 24 can rotate around rotating shaft, is used for performing cutting operation。
The quantity of cutting blade 24 is one or more, and multiple cutting blades 24 are circumferentially distributed, and detecting electrode 22 is than cutting blade 24 near ground, and the distance of detecting electrode 22 and rotating shaft is more than or equal to the radius of a circle of cutting blade 24。In the present embodiment, the quantity of cutting blade 24 is 3, is uniformly distributed on circumference。
Detecting electrode 22 is one or more。In the present embodiment, the quantity of detecting electrode 22 is 4, is evenly distributed on etc. on the circumference of radius, and the radius of a circle of detecting electrode 22 distribution is more than the radius of a circle of cutting blade 24。
It should be noted that, in other embodiments, the distribution of cutting blade 24 and detecting electrode 22 is not limited to this, can also be other quantity, it can be other distribution of shapes, such as it is more easy at foreign body and greater number of detecting electrode is set near place, and small number of detecting electrode is not easily set near place at foreign body。
Above-mentioned hay mover, detecting electrode 22 arrange radius of a circle more than cutting blade 24 radius, aspect ratio cutting blade 24 is low, namely distance ground closer to。When foreign body contacts blade, first touch the detecting electrode 22 of capacitance sensor, controlling device 26 and control cutter sweep stopping cutting, thus protecting foreign body, strengthening hay mover security protection performance。
Embodiment three
Different from embodiment one and embodiment two, the present embodiment need not be separately provided detecting electrode, as long as cutting blade 28 is metal material, cutting blade 28 can function simultaneously as detecting electrode。
Refer to the top view of the hay mover that Fig. 7 and Fig. 8, Fig. 7 are the present embodiment, Fig. 8 is the side view of the hay mover of the present embodiment。
In the present embodiment, hay mover includes capacitance sensor (not shown), signal processing circuit 30, controls device 32 and cutter sweep (not shown), their setting and annexation can refer to embodiment one, and the principle of signal processing circuit 30 can also refer to embodiment one。
In the present embodiment, the setting of cutting blade 28 can refer to embodiment two。
In the present embodiment, detecting electrode is cutting blade 28。
Above-mentioned hay mover, when foreign body is near cutting blade 28, can cause capacitive sensor signal to change; control device 32 and control cutter sweep stopping cutting, thus protecting foreign body, while strengthening hay mover security protection; hay mover part can also be saved, save cost。
In embodiment described above, the hay mover of any two or three embodiment combinations can also protect foreign body to preserve from, and strengthens the security protection performance of hay mover。
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded。
Embodiment described above only have expressed several embodiments of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope。It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model。Therefore, the protection domain of this utility model patent should be as the criterion with claims。
Claims (8)
1. a hay mover, it is characterised in that include capacitance sensor, signal processing circuit, control device and cutter sweep；
Wherein, when foreign body is near described capacitance sensor, the electric capacity of described capacitance sensor produces change；
Described signal processing circuit has input and outfan, described input electrically connects with described capacitance sensor, described outfan electrically connects with described control device, described signal processing circuit exports corresponding signal for the capacitance variations according to described capacitance sensor, and sends described signal to described control device；
Described control device electrically connects with described cutter sweep, and described control device is used for receiving described signal, value corresponding to described signal with threshold ratio set in advance relatively, comparative result represent exist foreign body near time, control described cutter sweep and quit work。
2. hay mover according to claim 1, it is characterised in that described capacitance sensor includes detecting electrode and reference electrode on the other side, and described detecting electrode is arranged at described cutter sweep and easily injures the side of foreign body。
3. hay mover according to claim 2, it is characterised in that also include: shell, described detecting electrode is the metal detection limit being arranged at described shell near the edge on ground。
4. hay mover according to claim 3, it is characterized in that, described shell is metal material, and described hay mover also includes the insulating barrier being arranged between described shell and described metal detection limit, and described insulating barrier is for insulating described shell and described metal detection limit。
5. hay mover according to claim 2, it is characterized in that, described cutter sweep includes the rotating shaft electrically connected with described control device and the cutting blade being connected on described rotating shaft, and described cutting blade can rotate around described rotating shaft, is used for performing cutting operation。
6. hay mover according to claim 5, it is characterized in that, the quantity of described cutting blade is one or more, multiple described cutting blades are circumferentially distributed, described detecting electrode is than described cutting blade near ground, and the distance of described detecting electrode and described rotating shaft is more than or equal to the radius of a circle of described cutting blade。
7. hay mover according to claim 6, it is characterised in that described detecting electrode is one or more。
8. hay mover according to claim 5, it is characterised in that described detecting electrode is described cutting blade。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064807.8U CN205320575U (en) | 2015-12-17 | 2015-12-17 | Mower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064807.8U CN205320575U (en) | 2015-12-17 | 2015-12-17 | Mower |
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| Publication Number | Publication Date |
|---|---|
| CN205320575U true CN205320575U (en) | 2016-06-22 |
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| CN201521064807.8U Active CN205320575U (en) | 2015-12-17 | 2015-12-17 | Mower |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888673A (en) * | 2015-12-17 | 2017-06-27 | 苏州宝时得电动工具有限公司 | Hay mover |
| CN107027433A (en) * | 2016-02-03 | 2017-08-11 | 苏州宝时得电动工具有限公司 | Hay mover |
| WO2018001340A1 (en) * | 2016-06-29 | 2018-01-04 | 苏州宝时得电动工具有限公司 | Self-mobile device |
| CN108323310A (en) * | 2017-01-19 | 2018-07-27 | 苏州科瓴精密机械科技有限公司 | Grass-removing robot |
| CN108575324A (en) * | 2017-02-24 | 2018-09-28 | 罗伯特·博世有限公司 | Method for protecting body part and grass trimmer |
| DE102018212412A1 (en) * | 2018-07-25 | 2020-01-30 | Robert Bosch Gmbh | Autonomous work tool |
| WO2022001556A1 (en) * | 2020-06-30 | 2022-01-06 | 纳恩博（北京）科技有限公司 | Grass mowing robot |
-
2015
- 2015-12-17 CN CN201521064807.8U patent/CN205320575U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888673A (en) * | 2015-12-17 | 2017-06-27 | 苏州宝时得电动工具有限公司 | Hay mover |
| CN115211274A (en) * | 2015-12-17 | 2022-10-21 | 苏州宝时得电动工具有限公司 | Grass cutter |
| CN107027433A (en) * | 2016-02-03 | 2017-08-11 | 苏州宝时得电动工具有限公司 | Hay mover |
| WO2018001340A1 (en) * | 2016-06-29 | 2018-01-04 | 苏州宝时得电动工具有限公司 | Self-mobile device |
| CN107544492A (en) * | 2016-06-29 | 2018-01-05 | 苏州宝时得电动工具有限公司 | It is a kind of from mobile device |
| CN108323310A (en) * | 2017-01-19 | 2018-07-27 | 苏州科瓴精密机械科技有限公司 | Grass-removing robot |
| CN108575324A (en) * | 2017-02-24 | 2018-09-28 | 罗伯特·博世有限公司 | Method for protecting body part and grass trimmer |
| DE102018212412A1 (en) * | 2018-07-25 | 2020-01-30 | Robert Bosch Gmbh | Autonomous work tool |
| WO2020020652A1 (en) | 2018-07-25 | 2020-01-30 | Robert Bosch Gmbh | Autonomous work device |
| WO2022001556A1 (en) * | 2020-06-30 | 2022-01-06 | 纳恩博（北京）科技有限公司 | Grass mowing robot |
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